View Filing Data

Document and Entity Information - shares	3 Months Ended
Document and Entity Information - shares	Mar. 31, 2013	Apr. 30, 2013
Document and Entity Information [Abstract]
Entity Registrant Name	Targa Resources Corp.
Entity Central Index Key	0001389170
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		42,329,987
Document Fiscal Year Focus	2013
Document Fiscal Period Focus	Q1
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Mar. 31, 2013

CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Millions	Mar. 31, 2013	Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 112.7	$ 76.3
Trade receivables, net of allowances $0.9 million and $0.9 million	427.6	514.9
Inventories	66.0	99.4
Assets from risk management activities	18.2	29.3
Other current assets	6.7	13.4
Total current assets	631.2	733.3
Property, plant and equipment	4,919.6	4,708.0
Accumulated depreciation	(1,227.2)	(1,170.0)
Property, plant and equipment, net	3,692.4	3,538.0
Other intangible assets, net	674.1	680.8
Long-term assets from risk management activities	3.2	5.1
Investment in unconsolidated affiliate	54.8	53.1
Other long-term assets	92.8	94.7
Total assets	5,148.5	5,105.0
Current liabilities:
Accounts payable and accrued liabilities	621.1	679.0
Deferred income taxes	3.8	0.2
Liabilities from risk management activities	8.2	7.4
Total current liabilities	633.1	686.6
Long-term debt	2,522.4	2,475.3
Long-term liabilities from risk management activities	5.0	4.8
Deferred income taxes	127.2	131.2
Other long-term liabilities	57.6	53.7
Commitments and contingencies (see Note 14)
Targa Resources Corp. stockholders' equity:
Common stock ($0.001 par value, 300,000,000 shares authorized, 42,528,118 shares issued and 42,330,387 shares outstanding as of March 31, 2013, and 42,492,233 shares issued and 42,294,502 shares outstanding as of December 31, 2012)	0.0	0.0
Preferred stock ($0.001 par value, 100,000,000 shares authorized, no shares issued and outstanding as of March 31, 2013 and December 31, 2012)	0.0	0.0
Additional paid-in capital	173.4	184.4
Accumulated deficit	(18.6)	(32.0)
Accumulated other comprehensive income	0.1	1.2
Treasury stock, at cost (197,731 shares as of March 31, 2013 and as of December 31, 2012)	(9.5)	(9.5)
Total Targa Resources Corp. stockholders' equity	145.4	144.1
Noncontrolling interests in subsidiaries	1,657.8	1,609.3
Total owners' equity	1,803.2	1,753.4
Total liabilities and owners' equity	$ 5,148.5	$ 5,105.0

CONSOLIDATED BALANCE SHEETS (Unaudited) (Parenthetical) - USD ($) $ in Millions	Mar. 31, 2013	Dec. 31, 2012
Current assets:
Trade receivables, allowances	$ 0.9	$ 0.9
Owners' equity:
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized (in shares)	300,000,000	300,000,000
Common stock, shares issued (in shares)	42,528,118	42,492,233
Common stock, shares outstanding (in shares)	42,330,387	42,294,502
Preferred stock, par value (in dollar per share)	$ 0.001	$ 0.001
Preferred stock, shares authorized (in shares)	100,000,000	100,000,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Treasury Stock, shares (in shares)	197,731	197,731

CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) [Abstract]
Revenues	$ 1,397.8	$ 1,645.8
Costs and expenses:
Product purchases	1,137.5	1,384.2
Operating expenses	86.1	71.6
Depreciation and amortization expenses	64.0	47.4
General and administrative expenses	36.3	34.9
Income from operations	73.9	107.7
Other income (expense):
Interest expense, net	(32.1)	(30.5)
Equity earnings	1.6	2.1
Other	(0.2)	0.0
Income before income taxes	43.2	79.3
Income tax expense:
Current	(9.2)	(8.7)
Deferred	(0.2)	(1.4)
Income tax expense total	(9.4)	(10.1)
Net income	33.8	69.2
Less: Net income attributable to noncontrolling interests	20.4	59.6
Net income available to common shareholders	$ 13.4	$ 9.6
Net income available per common share - basic (in dollars per share)	$ 0.32	$ 0.23
Net income available per common share - diluted (in dollars per share)	$ 0.32	$ 0.23
Weighted average shares outstanding - basic (in shares)	41.6	41.0
Weighted average shares outstanding - diluted (in shares)	42.0	41.8

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Net income attributable to Targa Resources Corp.	$ 13.4	$ 9.6
Other comprehensive income (loss) attributable to Targa Resources Corp.
Net income attributable to noncontrolling interests	(20.4)	(59.6)
Pre-Tax [Member]
Other comprehensive income (loss) attributable to Targa Resources Corp.
Other comprehensive income (loss) attributable to Targa Resources Corp.	(1.9)	2.2
Other comprehensive income (loss) attributable to noncontrolling interests
Other comprehensive income (loss) attributable to noncontrolling interests	(10.6)	13.1
Related Income Tax [Member]
Other comprehensive income (loss) attributable to Targa Resources Corp.
Other comprehensive income (loss) attributable to Targa Resources Corp.	0.8	(0.9)
Other comprehensive income (loss) attributable to noncontrolling interests
Other comprehensive income (loss) attributable to noncontrolling interests	0.0	0.0
After Tax [Member]
Net income attributable to Targa Resources Corp.	13.4	9.6
Other comprehensive income (loss) attributable to Targa Resources Corp.
Other comprehensive income (loss) attributable to Targa Resources Corp.	(1.1)	1.3
Comprehensive income attributable to Targa Resources Corp.	12.3	10.9
Net income attributable to noncontrolling interests	20.4	59.6
Other comprehensive income (loss) attributable to noncontrolling interests
Other comprehensive income (loss) attributable to noncontrolling interests	(10.6)	13.1
Comprehensive income attributable to noncontrolling interests	9.8	72.7
Total comprehensive income	22.1	83.6
Commodity Contract [Member] \| Pre-Tax [Member]
Other comprehensive income (loss) attributable to Targa Resources Corp.
Change in fair value	(1.2)	2.4
Settlements reclassified to revenues	(0.9)	(0.6)
Other comprehensive income (loss) attributable to noncontrolling interests
Change in fair value	(6.4)	13.1
Settlements reclassified to revenues	(5.7)	(1.9)
Commodity Contract [Member] \| Related Income Tax [Member]
Other comprehensive income (loss) attributable to Targa Resources Corp.
Change in fair value	0.5	(0.9)
Settlements reclassified to revenues	0.4	0.2
Other comprehensive income (loss) attributable to noncontrolling interests
Change in fair value	0.0	0.0
Settlements reclassified to revenues	0.0	0.0
Commodity Contract [Member] \| After Tax [Member]
Other comprehensive income (loss) attributable to Targa Resources Corp.
Change in fair value	(0.7)	1.5
Settlements reclassified to revenues	(0.5)	(0.4)
Other comprehensive income (loss) attributable to noncontrolling interests
Change in fair value	(6.4)	13.1
Settlements reclassified to revenues	(5.7)	(1.9)
Interest Rate Swap [Member] \| Pre-Tax [Member]
Other comprehensive income (loss) attributable to Targa Resources Corp.
Settlements reclassified to interest expense, net	0.2	0.4
Other comprehensive income (loss) attributable to noncontrolling interests
Settlements reclassified to interest expense, net	1.5	1.9
Interest Rate Swap [Member] \| Related Income Tax [Member]
Other comprehensive income (loss) attributable to Targa Resources Corp.
Settlements reclassified to interest expense, net	(0.1)	(0.2)
Other comprehensive income (loss) attributable to noncontrolling interests
Settlements reclassified to interest expense, net	0.0	0.0
Interest Rate Swap [Member] \| After Tax [Member]
Other comprehensive income (loss) attributable to Targa Resources Corp.
Settlements reclassified to interest expense, net	0.1	0.2
Other comprehensive income (loss) attributable to noncontrolling interests
Settlements reclassified to interest expense, net	$ 1.5	$ 1.9

CONSOLIDATED STATEMENTS OF CHANGES IN OWNERS' EQUITY (Unaudited) - USD ($) shares in Thousands, $ in Millions	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Deficit [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Treasury Shares [Member]	Noncontrolling Interests [Member]	Total
Balance at beginning of period at Dec. 31, 2011	$ 0.0	$ 229.5	$ (70.1)	$ (1.3)	$ 0.0	$ 1,172.6	$ 1,330.7
Balance at beginning of period (in shares) at Dec. 31, 2011	42,398				0
Compensation on equity grants	$ 0.0	3.9	0.0	0.0	$ 0.0	0.6	4.5
Compensation on equity grants (in shares)	43				0
Sale of Partnership limited partner interests	$ 0.0	0.0	0.0	0.0	$ 0.0	115.2	115.2
Impact of Partnership equity transactions	0.0	(18.3)	0.0	0.0	0.0	18.3	0.0
Dividends	0.0	(14.3)	0.0	0.0	0.0	(0.1)	(14.4)
Distributions to owners	0.0	0.0	0.0	0.0	0.0	(54.3)	(54.3)
Other comprehensive income (loss)	0.0	0.0	0.0	1.3	0.0	13.1	14.4
Net income	0.0	0.0	9.6	0.0	0.0	59.6	69.2
Balance at end of period at Mar. 31, 2012	$ 0.0	200.8	(60.5)	0.0	$ 0.0	1,325.0	1,465.3
Balance end of period (in shares) at Mar. 31, 2012	42,441				0
Balance at beginning of period at Dec. 31, 2011	$ 0.0	229.5	(70.1)	(1.3)	$ 0.0	1,172.6	1,330.7
Balance at beginning of period (in shares) at Dec. 31, 2011	42,398				0
Net income							159.3
Balance at end of period at Dec. 31, 2012	$ 0.0	184.4	(32.0)	1.2	$ (9.5)	1,609.3	1,753.4
Balance end of period (in shares) at Dec. 31, 2012	42,295				198
Compensation on equity grants	$ 0.0	2.1	0.0	0.0	$ 0.0	1.7	3.8
Compensation on equity grants (in shares)	35				0
Accrual of distribution equivalent rights	$ 0.0	0.0	0.0	0.0	$ 0.0	(0.3)	(0.3)
Sale of Partnership limited partner interests	0.0	0.0	0.0	0.0	0.0	105.3	105.3
Impact of Partnership equity transactions	0.0	6.3	0.0	0.0	0.0	(6.3)	0.0
Dividends	0.0	(19.4)	0.0	0.0	0.0	0.0	(19.4)
Distributions to owners	0.0	0.0	0.0	0.0	0.0	(61.7)	(61.7)
Other comprehensive income (loss)	0.0	0.0	0.0	(1.1)	0.0	(10.6)	(11.7)
Net income	0.0	0.0	13.4	0.0	0.0	20.4	33.8
Balance at end of period at Mar. 31, 2013	$ 0.0	$ 173.4	$ (18.6)	$ 0.1	$ (9.5)	$ 1,657.8	$ 1,803.2
Balance end of period (in shares) at Mar. 31, 2013	42,330				198

CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Cash flows from operating activities
Net income	$ 33.8	$ 69.2
Adjustments to reconcile net income to net cash provided by operating activities:
Amortization in interest expense	4.1	4.8
Compensation on equity grants	3.8	4.5
Depreciation and amortization expense	64.0	47.4
Accretion of asset retirement obligations	1.1	1.0
Deferred income tax expense	0.2	1.4
Equity earnings, net of distributions	(1.6)	0.0
Risk management activities	(0.2)	0.9
Gain on sale or disposition of assets	(0.1)	0.0
Changes in operating assets and liabilities:
Receivables and other assets	95.1	119.6
Inventory	33.7	44.3
Accounts payable and other liabilities	(59.9)	(154.3)
Net cash provided by operating activities	174.0	138.8
Cash flows from investing activities
Outlays for property, plant and equipment	(202.9)	(103.0)
Investment in unconsolidated affiliate	0.0	(6.2)
Return of capital from unconsolidated affiliate	0.0	0.3
Other, net	(4.6)	0.8
Net cash used in investing activities	(207.5)	(108.1)
Partnership loan facilities:
Proceeds	325.0	545.0
Repayments	(380.0)	(643.0)
Partnership accounts receivable securitization facility:
Proceeds	171.4	0.0
Repayments	(60.0)	0.0
Non-Partnership loan facilities:
Proceeds	5.0	0.0
Repayments	(15.0)	0.0
Costs incurred in connection with financing arrangements	(1.1)	(4.4)
Distributions to owners	(61.7)	(54.3)
Proceeds from sale of common units of the Partnership	105.3	115.2
Dividends to common and common equivalent shareholders	(19.0)	(13.8)
Net cash provided by (used in) financing activities	69.9	(55.3)
Net change in cash and cash equivalents	36.4	(24.6)
Cash and cash equivalents, beginning of period	76.3	145.8
Cash and cash equivalents, end of period	$ 112.7	$ 121.2

Organization	3 Months Ended
Organization	Mar. 31, 2013
Organization and Operations [Abstract]
Organization	Note 1 — Organization Targa Resources Corp. ("TRC") is a Delaware corporation formed in October 2005. Our common stock is listed on the NYSE under the symbol "TRGP." In this Quarterly Report, unless the context requires otherwise, references to "we," "us," "our," "the Company" or "Targa" are intended to mean our consolidated business and operations, including our wholly owned subsidiary TRI Resources Inc. ("TRI").

- Definition

The entire disclosure for the nature of an entity's business, the major products or services it sells or provides and its principal markets, including the locations of those markets. If the entity operates in more than one business, the disclosure also indicates the relative importance of its operations in each business and the basis for the determination (for example, assets, revenues, or earnings).

+ References + Details

Basis of Presentation

3 Months Ended

Mar. 31, 2013

Basis of Presentation [Abstract]

Basis of Presentation

Note 2 — Basis of Presentation

We have prepared these unaudited consolidated financial statements in accordance with GAAP for interim financial information and with the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by GAAP for complete financial statements. While we derived the year-end balance sheet data from audited financial statements, this interim report does not include all disclosures required by GAAP for annual periods. These unaudited consolidated financial statements and other information included in this Quarterly Report should be read in conjunction with our consolidated financial statements and notes thereto included in our Annual Report.

The unaudited consolidated financial statements for the three months ended March 31, 2013 and 2012 include all adjustments which we believe are necessary for a fair presentation of the results for interim periods. All significant intercompany balances and transactions have been eliminated in consolidation. Certain amounts in prior periods may have been reclassified to conform to the current year presentation.

Our financial results for the three months ended March 31, 2013 are not necessarily indicative of the results that may be expected for the full year ending December 31, 2013.

One of our indirect subsidiaries is the sole general partner of Targa Resources Partners LP (the "Partnership"). Because we control the general partner of the Partnership, under GAAP, we must reflect our ownership interests in the Partnership on a consolidated basis. Accordingly, the Partnership's financial results are included in our consolidated financial statements even though the distribution or transfer of Partnership assets is limited by the terms of the Partnership's partnership agreement, as well as restrictive covenants in the Partnership's lending agreements. The limited partner interests in the Partnership not owned by us are reflected in our results of operations as net income attributable to noncontrolling interests and in our balance sheet equity section as noncontrolling interests in subsidiaries. Throughout these footnotes, we make a distinction where relevant between financial results of the Partnership versus those of a standalone parent and its non-partnership subsidiaries.

As of March 31, 2013, our interests in the Partnership consist of the following:

a 2% general partner interest, which we hold through our 100% ownership interest in the general partner of the Partnership;

all Incentive Distribution Rights ("IDRs"); and

12,945,659 common units of the Partnership, representing a 12.6% limited partnership interest.

The Partnership is engaged in the business of gathering, compressing, treating, processing and selling natural gas; storing, fractionating, treating, transporting and selling NGLs and NGL products; gathering, storing and terminaling crude oil; and storing, terminaling and selling refined petroleum products. See Note 15 for an analysis of our and the Partnership's operations by segment.

- Definition

The entire disclosure for organization, consolidation and basis of presentation of financial statements disclosure.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Research Bulletin (ARB)
-Number 51
-Paragraph 2-6
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Name Statement of Position (SOP)
-Publisher AICPA
-Number 94-6
-Paragraph 10
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Name FASB Interpretation (FIN)
-Publisher FASB
-Number 46R
-Paragraph 4, 14, 15
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=6367646&loc=d3e18780-107790

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 205
-SubTopic 10
-Section 45
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=6359553&loc=d3e288-107754

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-URI http://asc.fasb.org/subtopic&trid=2197480

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6921930&loc=d3e5614-111684

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 915
-SubTopic 235
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6472506&loc=d3e38932-110933

Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 852
-SubTopic 10
-URI http://asc.fasb.org/subtopic&trid=2209116

Reference 10: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 272
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=6373374&loc=d3e70478-108055

Reference 11: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 50
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=6970148&loc=SL6228881-111685

Reference 12: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 205
-SubTopic 10
-URI http://asc.fasb.org/subtopic&trid=2122150

Reference 13: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 205
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6359566&loc=d3e326-107755

Reference 14: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 720
-SubTopic 15
-URI http://asc.fasb.org/subtopic&trid=2122524

Reference 15: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-URI http://asc.fasb.org/subtopic&trid=2134480

Reference 16: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name FASB Staff Position (FSP)
-Number FAS140-4/FIN46(R)-8
-Paragraph 8, C1, C7
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

Significant Accounting Policies	3 Months Ended
Significant Accounting Policies	Mar. 31, 2013
Significant Accounting Policies [Abstract]
Significant Accounting Policies	Note 3 — Significant Accounting Policies Accounting Policy Updates/Revisions The accounting policies that we follow are set forth in Note 3 of the Notes to Consolidated Financial Statements in our Annual Report on Form 10-K for the year ended December 31, 2012. Significant updates or revisions to these policies during the three months ended March 31, 2013 are shown below. Accounts Receivable Securitization Facility Under the Partnership's Accounts Receivable Securitization Facility (the "Securitization Facility'), proceeds from the sales of certain receivables are treated as collateralized borrowings in our financial statements. All amounts outstanding under the Securitization Facility are reflected as long-term debt on our balance sheets to the extent that the Partnership has the ability and intent to fund the Securitization Facility's borrowings on a long-term basis. Proceeds and repayments under the Securitization Facility are reflected as cash flows from financing activities on our statements of cash flows. Intangible Assets Intangible assets arose from producer dedications under long-term contracts and customer relationships associated with businesses acquisitions. The fair value of these acquired intangible assets was determined at the date of acquisition based on the present value of estimated future cash flows. Amortization expense attributable to these assets is recorded in a manner that closely resembles the expected pattern in which we benefit from services provided to customers. Recent Accounting Pronouncements In January 2013, the FASB issued Accounting Standards Update No. 2013-01, Balance Sheet (Topic 210): Clarifying the Scope of Disclosures about Offsetting Assets and Liabilities, which clarifies that ASU 2011-11, Balance Sheet (Topic 210): Disclosures about Offsetting Assets and Liabilities, applies to financial instruments or derivative transactions accounted for under ASC 815. The amendments require disclosures to present both gross and net amounts of derivative assets and liabilities that are subject to master netting arrangements with counterparties. We currently present the Partnership's derivative assets and liabilities gross on our statement of financial position. We have provided additional disclosures regarding the gross and net amounts of derivative assets and liabilities in Note 12 in accordance with these new standards updates.

- Definition

The entire disclosure for all significant accounting policies of the reporting entity.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Principles Board Opinion (APB)
-Number 22
-Paragraph 8
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=6367646&loc=d3e18780-107790

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6367646&loc=d3e18726-107790

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6367646&loc=d3e18743-107790

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=6367646&loc=d3e18854-107790

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section 50
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=6367646&loc=d3e18861-107790

+ Details

Business Acquisitions

3 Months Ended

Mar. 31, 2013

Business Acquisitions [Abstract]

Business Acquisitions

Note 4 –Business Acquisitions

On December 31, 2012, the Partnership completed the acquisition of Saddle Butte Pipeline, LLC's ownership of its Williston Basin crude oil pipeline and terminal system and its natural gas gathering and processing operations (collectively "Badlands").

Pursuant to the Membership Interest Purchase and Sale Agreement dated November 19, 2012 (the "MIPSA"), the acquisition is subject to a contingent payment of $50 million ("the contingent consideration") if aggregate crude oil gathering volumes exceed certain stipulated monthly thresholds during the period from January 2013 through June 2014. If the threshold is not attained during the contingency period, no payment is owed. Accounting standards require that the contingent consideration be recorded at fair value at the date of acquisition and revalued at subsequent reporting dates under the acquisition method of accounting and revalued during the contingency period. At December 31, 2012, the Partnership recorded a $15.3 million accrued liability representing the fair value of this contingent consideration, determined by a probability based model measuring the likelihood of meeting certain volumetric measures identified in the MIPSA.

Future changes in the fair value of this accrued liability are included in earnings and reported as Other income (expense) in the Consolidated Statement of Operations. At March 31, 2013, the Partnership re-estimated the contingent consideration to be $15.6 million, an increase of $0.3 million attributable to accretion of the discount factor due to the passage of time. The current assessment of other valuation variables and factors has not changed since the acquisition date.

Our Annual Report on Form 10-K included the pro-forma schedule information for the year ended 2012. The following table presents updated 2012 pro forma information to reflect the effects of our 2013 policy decisions regarding depreciation and amortization of acquired properties and intangible assets, as described below. The following table also presents quarterly unaudited pro forma information for the three months ended March 31, 2012 for comparative purposes in this quarterly report.

	Year Ended December 31, 2012				Three Months Ended
	As reported in 10-K		Pro forma		March 31, 2012
	( In millions except per share amounts)
Revenues	$	5,885.7	$	5,909.9	$	1,648.7
Net income		159.3		129.5		59.2
Less: Net income attributable to noncontrolling interests		121.2		83.5		47.3
Net income attributable to Targa Resources Corp.	$	38.1	$	46.0	$	11.9

Net income per common share - Basic	$	0.93	$	1.12	$	0.29
Net income per common share - Diluted	$	0.91	$	1.10	$	0.28

The Partnership applied the same assumptions used in preparing the year-end pro forma schedules reported in its Annual Report on Form 10-K except for the following adjustments to conform to its current accounting policies:

·	depreciation expenses associated with the fair value adjustments to property, plant and equipment using straight-line method over a useful life of 15-20 years. The pro forma information included in our 2012 Form 10-K utilized a 30 year useful life;

amortization expenses associated with the fair value adjustments to definite-lived intangibles in a manner that closely resembles the expected pattern in which we benefit from services provided to customers, over a useful life of 20 years. The pro forma information included in our 2012 10-K utilized a straight-line method over a 30 year life; and

·	adjustment to pro forma revenues to report purchases, and sales on a net, rather than gross, basis for certain Badlands natural gas processing agreements in which we are in substance an agent rather than a principal.

- Definition

The entire disclosure for a business combination (or series of individually immaterial business combinations) completed during the period, including background, timing, and recognized assets and liabilities. The disclosure may include leverage buyout transactions (as applicable).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Emerging Issues Task Force (EITF)
-Number 88-16
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 141
-Paragraph 51, 52
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 141R
-Appendix F
-Paragraph F4
-Subparagraph e

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 141R
-Paragraph 67-73
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6911361&loc=d3e6927-128479

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=6972119&loc=d3e1490-128463

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=6911361&loc=d3e7008-128479

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 50
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=6972119&loc=d3e1500-128463

Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 20
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=6910749&loc=d3e4926-128472

Reference 10: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 20
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6910749&loc=d3e4922-128472

Reference 11: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6911361&loc=d3e6996-128479

Reference 12: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 50
-Paragraph 7
-URI http://asc.fasb.org/extlink&oid=6972119&loc=d3e1524-128463

Reference 13: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6972119&loc=d3e1392-128463

Reference 14: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=6911361&loc=d3e7000-128479

Reference 15: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6910749&loc=d3e4845-128472

Reference 16: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 20
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=6910749&loc=d3e4934-128472

Reference 17: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=6972119&loc=d3e1497-128463

Reference 18: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=6972119&loc=d3e1486-128463

Reference 19: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6972119&loc=d3e1383-128463

+ Details

Inventories

3 Months Ended

Mar. 31, 2013

Inventories [Abstract]

Inventories

Note 5 — Inventories

The components of inventories consisted of the following:

	March 31, 2013		December 31, 2012
Natural gas liquids	$	44.2	$	82.3
Materials and supplies		21.8		17.1
	$	66.0	$	99.4

- Definition

The entire disclosure for inventory. This may include, but is not limited to, the basis of stating inventory, the method of determining inventory cost, the major classes of inventory, and the nature of the cost elements included in inventory. If inventory is stated above cost, accrued net losses on firm purchase commitments for inventory and losses resulting from valuing inventory at the lower-of-cost-or-market may also be included. For LIFO inventory, may disclose the amount and basis for determining the excess of replacement or current cost over stated LIFO value and the effects of a LIFO quantities liquidation that impacts net income.

+ References + Details

Property, Plant and Equipment and Intangible Assets

3 Months Ended

Mar. 31, 2013

Property, Plant and Equipment and Intangible Assets [Abstract]

Property, Plant and Equipment and Intangible Assets

Note 6 — Property, Plant and Equipment and Intangible Assets

	March 31, 2013									December 31, 2012
	Targa Resources Partners LP			TRC Non-Partnership			Targa Resources Corp. Consolidated			Targa Resources Partners LP			TRC Non-Partnership			Targa Resources Corp. Consolidated			Estimated Useful Lives (In Years)
Gathering systems	$	2,048.0		$	-		$	2,048.0		$	1,975.3		$	-		$	1,975.3		5 to 20
Processing and fractionation facilities		1,262.1			6.6			1,268.7			1,251.6			6.6			1,258.2		5 to 25
Terminaling and storage facilities		502.6			-			502.6			462.0			-			462.0		5 to 25
Transportation assets		292.6			-			292.6			292.5			-			292.5		10 to 25
Other property, plant and equipment		86.7			0.2			86.9			84.6			0.2			84.8		3 to 25
Land		87.1			-			87.1			87.1			-			87.1			-
Construction in progress		633.7			-			633.7			548.1			-			548.1			-
Property, plant and equipment	$	4,912.8		$	6.8		$	4,919.6		$	4,701.2		$	6.8		$	4,708.0
Accumulated depreciation		(1,225.1	)		(2.1	)		(1,227.2	)		(1,168.0	)		(2.0	)		(1,170.0	)
Property, plant and equipment, net	$	3,687.7		$	4.7		$	3,692.4		$	3,533.2		$	4.8		$	3,538.0

Intangible assets	$	680.8		$	-		$	680.8		$	680.8		$	-		$	680.8			20
Accumulated amortization		(6.7	)		-			(6.7	)		-			-			-
Intangible assets, net	$	674.1		$	-		$	674.1		$	680.8		$	-		$	680.8

Intangible assets consist of customer contracts and customer relationships acquired in business acquisitions. The fair value of these acquired intangible assets was determined at the date of acquisition based on the present value of estimated future cash flows. Key valuation assumptions include probability of contracts under negotiation, renewals of existing contracts, economic incentives to retain customers, past and future volumes, current and future capacity of the gathering system, pricing volatility and the discount rate.

Customer contracts and customer relationships related to the Badlands system have an estimated economic useful life of 20 years. Amortization expense attributable to these assets is recorded using a method that closely reflects the cash flow pattern underlying the intangible asset valuation. Our estimated amortization expense for our intangible assets for each of the next five calendar years (2013-2017) is approximately $27.1 million, $61.4 million, $80.1 million, $88.3 million and $81.5 million.

Accounts Payable and Accrued Liabilities

3 Months Ended

Mar. 31, 2013

Accounts Payable and Accrued Liabilities [Abstract]

Accounts Payable and Accrued Liabilities

Note 7 — Accounts Payable and Accrued Liabilities

The components of accounts payable and accrued liabilities consisted of the following:

	March 31, 2013		December 31, 2012
Commodities	$	383.5	$	416.8
Other goods and services		141.0		154.4
Interest		35.3		39.5
Compensation and benefits		30.4		40.7
Other		30.9		27.6
	$	621.1	$	679.0

- Definition

The entire disclosure for accounts payable and accrued liabilities at the end of the reporting period.

+ References + Details

Debt Obligations

3 Months Ended

Mar. 31, 2013

Debt Obligations [Abstract]

Debt Obligations

Note 8 — Debt Obligations

	March 31, 2013			December 31, 2012
Long-term debt:
Non-Partnership obligations:
TRC Senior secured revolving credit facility, variable rate, due October 2017 (1)	$	72.0		$	82.0
Obligations of the Partnership: (2)
Senior secured revolving credit facility, variable rate, due October 2017 (3)		565.0			620.0
Senior unsecured notes, 11¼% fixed rate, due July 2017		72.7			72.7
Unamortized discount		(2.4	)		(2.5	)
Senior unsecured notes, 7⅞% fixed rate, due October 2018		250.0			250.0
Senior unsecured notes, 6⅞% fixed rate, due February 2021		483.6			483.6
Unamortized discount		(29.9	)		(30.5	)
Senior unsecured notes, 6⅜% fixed rate, due August 2022		400.0			400.0
Senior unsecured notes, 5¼% fixed rate, due May 2023		600.0			600.0
Accounts receivable securitization facility, due January 2014 (4)		111.4			-
Total long-term debt	$	2,522.4		$	2,475.3
Irrevocable standby letters of credit:
Letters of credit outstanding under TRC Senior secured credit facility (1)	$	-		$	-
Letters of credit outstanding under the Partnership senior secured revolving credit facility (3)		53.2			45.3
	$	53.2		$	45.3

(1)	As of March 31, 2013, $78.0 million of TRC's $150.0 million credit facility was available.

(2)	While we consolidate the debt of the Partnership in our financial statements, we do not have the obligation to make interest payments or debt payments with respect to the debt of the Partnership.

(3)	As of March 31, 2013, availability under the Partnership's $1.2 billion senior secured revolving credit facility was $581.8 million.

(4)

All amounts outstanding under the Partnership's Securitization Facility are reflected as long-term debt in our balance sheet to the extent that the Partnership has the ability and intent to fund the Securitization Facility's borrowing with availability under the Partnership's long-term Senior Secured Credit Facility (the "TRP Revolver").

The following table shows the range of interest rates and weighted average interest rate incurred on our and the Partnership's variable-rate debt obligations during the three months ended March 31, 2013:

	Range of Interest Rates Incurred			Weighted Average Interest Rate Incurred
TRC senior secured revolving credit facility		2.9% - 3.0	%		3.0	%
Partnership's senior secured revolving credit facility		1.9% - 4.5	%		2.2	%
Partnership's accounts receivable securitization facility		0.9	%		0.9	%

Compliance with Debt Covenants

As of March 31, 2013, both the Partnership and we were in compliance with the covenants contained in our various debt agreements.

Accounts Receivable Securitization Facility

In January 2013, the Partnership entered into the Securitization Facility to provide up to $200 million of borrowing capacity at commercial paper rates plus a margin through January 2014. Under this Securitization Facility, one of the Partnership's consolidated subsidiaries (Targa Liquids Marketing and Trade LLC or "TLMT") sells or contributes receivables, without recourse, to another of the Partnership's consolidated subsidiaries (Targa Receivables LLC or "TRLLC"), a special purpose consolidated subsidiary created for the sole purpose of this Securitization Facility. TRLLC, in turn, sells an undivided percentage ownership in the eligible receivables to a third-party financial institution. Eligible TRLLC receivables up to the amount of the outstanding debt under the Securitization Facility are not available to satisfy the claims of the creditors of TLMT or us. Any excess receivables are eligible to satisfy the claims of creditors of TLMT or us.

- Definition

The entire disclosure for information about short-term and long-term debt arrangements, which includes amounts of borrowings under each line of credit, note payable, commercial paper issue, bonds indenture, debenture issue, own-share lending arrangements and any other contractual agreement to repay funds, and about the underlying arrangements, rationale for a classification as long-term, including repayment terms, interest rates, collateral provided, restrictions on use of assets and activities, whether or not in compliance with debt covenants, and other matters important to users of the financial statements, such as the effects of refinancing and noncompliance with debt covenants.

+ References + Details

Partnership Units and Related Matters

3 Months Ended

Mar. 31, 2013

Partnership Units and Related Matters [Abstract]

Partnership Units and Related Matters

Note 9 — Partnership Units and Related Matters

Public Offerings of Common Units

In 2012, the Partnership filed with the SEC a universal shelf registration statement that, subject to effectiveness at the time of use, allows the Partnership to issue up to an aggregate of $300 million of debt or equity securities (the "2012 Shelf"). The 2012 Shelf expires in August 2015. In August 2012, the Partnership entered into an Equity Distribution Agreement ("2012 EDA") with Citigroup Global Markets Inc. ("Citigroup") pursuant to which the Partnership may sell, at its option, up to an aggregate of $100 million of its common units through Citibank, as sales agent, under the 2012 Shelf. Settlement for sales of common units will occur on the third business day following the date on which any sales were made in return for payment of the net proceeds to the Partnership. During the three months ended March 31, 2013, the Partnership issued 2,420,046 common units under the 2012 EDA and received gross proceeds of $96.7 million pursuant to the 2012 EDA. We contributed $2.0 million to maintain our 2% general partner interest.

In March 2013, the Partnership entered into a second Equity Distribution Agreement (the "2013 EDA") with Citigroup, Deutsche Bank Securities Inc., Raymond James & Associates, Inc. and UBS Securities LLC, as sales agents, pursuant to which the Partnership may sell, at its option, up to an aggregate of $200 million of the Partnership common units under the 2012 Shelf. During the three months ended March 31, 2013, the Partnership issued 248,252 common units and received gross proceeds of $10.7 million, pursuant to the 2013 EDA. We contributed $0.3 million to maintain its 2% general partner interest.

Distributions

In accordance with the partnership agreement, the Partnership must distribute all of its available cash, as determined by the general partner, to unitholders of record within 45 days after the end of each quarter. The following table details the distributions declared and/or paid by the Partnership during the three months ended March 31, 2013.

		Distributions
Three Months Ended	Date Paid or to be Paid	Limited Partners		General Partner					Distributions to Targa Resources Corp.		Distributions per limited partner unit
Three Months Ended	Date Paid or to be Paid	Common		Incentive		2%	Total		Distributions to Targa Resources Corp.		Distributions per limited partner unit

(In millions, except per unit amounts)
March 31, 2013	May 15, 2013	$	71.7	$	22.1	1.9	$	95.7	$	33.0	$	0.6975
December 31, 2012	February 14, 2013		69.0		20.1	1.8		90.9		30.7		0.6800

Subsequent Event

In April 2013, the Partnership filed with the SEC a universal shelf registration statement (the "2013 Shelf"), which provides the Partnership with the ability to offer and sell an unlimited amount of debt and equity securities, subject to market conditions and the Partnership's capital needs. The 2013 Shelf expires in April 2016.

- Definition

The entire disclosure for the formation, structure, control and ownership of the partnership. Disclosures related to accounts comprising partners' capital. Includes balances of general partners' capital account, limited partners' capital account, preferred partners' capital account and total partners' capital account and units outstanding; accumulated other comprehensive income; amount and nature of changes to amount of partner's capital and units outstanding by class, rights and privileges for each class of units; distribution policies and distributions paid by unit class; impact of and correction of an error in previously issued financial statements; limitations of partners' liability; redemption, conversion and distribution policies; and deferred compensation related to the issuance of units.

+ References

+ Details

Common Stock and Related Matters

3 Months Ended

Mar. 31, 2013

Common Stock and Related Matters [Abstract]

Common Stock and Related Matters

Note 10 — Common Stock and Related Matters

The following table details the dividends declared and/or paid by us during the three months ended March 31, 2013:

Three Months Ended	Date Paid or to be Paid	Total Dividend Declared		Amount of Dividend Paid		Accrued Dividends (1)		Dividend Declared per Share of Common Stock

(In millions, except per share amounts)
March 31, 2013	May 16, 2013	$	21.0	$	20.6	$	0.4	$	0.49500
December 31, 2012	February 15, 2013		19.4		19.0		0.4		0.45750

(1)	Represents accrued dividends on the restricted shares that are payable upon vesting.

- Definition

Tabular disclosure of an entity's stock, including par or stated value per share, number and dollar amount of share subscriptions, shares authorized, shares issued, shares outstanding, number and dollar amount of shares held in an employee trust, dividend per share, total dividends, share conversion features, par value plus additional paid in capital, the value of treasury stock and other information necessary to a fair presentation, and EPS information. Stock by class includes common, convertible, and preferred stocks which are not redeemable or redeemable solely at the option of the issuer. Includes preferred stock with redemption features that are solely within the control of the issuer and mandatorily redeemable stock if redemption is required to occur only upon liquidation or termination of the reporting entity. If more than one issue is outstanding, state the title of each issue and the corresponding dollar amount; dollar amount of any shares subscribed but unissued and the deduction of subscriptions receivable there from; number of shares authorized, issued, and outstanding.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 30
-Article 5

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Article 5
-Section 02
-Paragraph 29

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 150
-Paragraph 9
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21475-112644

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21484-112644

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21488-112644

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(d),(e))
-URI http://asc.fasb.org/extlink&oid=6881521&loc=d3e23780-122690

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21506-112644

Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21538-112644

Reference 10: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 7
-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21521-112644

Reference 11: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21553-112644

Reference 12: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6403732&loc=d3e21300-112643

Reference 13: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6959260&loc=d3e187085-122770

Reference 14: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.28,29)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 15: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 480
-SubTopic 10
-Section S99
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6802392&loc=d3e177068-122764

+ Details

Earnings per Common Share

3 Months Ended

Mar. 31, 2013

Earnings per Common Share [Abstract]

Earnings per Common Share

Note 11 — Earnings per Common Share

The following table sets forth a reconciliation of net income and weighted average shares outstanding used in computing basic and diluted net income per common share:

	Three Months Ended March 31,
	2013		2012
Net income	$	33.8	$	69.2
Less: Net income attributable to noncontrolling interests		20.4		59.6
Net income attributable to common shareholders	$	13.4	$	9.6

Weighted average shares outstanding - basic		41.6		41.0

Net income available per common share - basic	$	0.32	$	0.23

Weighted average shares outstanding		41.6		41.0
Dilutive effect of unvested stock awards		0.4		0.8
Weighted average shares outstanding - diluted		42.0		41.8

Net income available per common share - diluted	$	0.32	$	0.23

- Definition

The entire disclosure for earnings per share.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 128
-Paragraph 40
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.21)
-URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6920599&loc=d3e1252-109256

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 55
-Paragraph 52
-URI http://asc.fasb.org/extlink&oid=6945512&loc=d3e4984-109258

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 45
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=6920599&loc=d3e1278-109256

+ Details

Derivative Instruments and Hedging Activities

3 Months Ended

Mar. 31, 2013

Derivative Instruments and Hedging Activities [Abstract]

Derivative Instruments and Hedging Activities

Note 12 — Derivative Instruments and Hedging Activities

Partnership Commodity Hedges

The primary purpose of the Partnership's commodity risk management activities is to manage its exposure to commodity price risk and reduce volatility in its operating cash flow due to fluctuations in commodity prices. The Partnership has hedged the commodity prices associated with a portion of its expected (i) natural gas equity volumes in Field Gathering and Processing Operations and (ii) NGL and condensate equity volumes predominately in Field Gathering and Processing segment and the LOU business unit in Coastal Gathering and Processing segment that result from its percent of proceeds processing arrangements. These hedge positions will move favorably in periods of falling prices and unfavorably in periods of rising prices. The Partnership has designated these derivative contracts as cash flow hedges for accounting purposes.

The hedges generally match the NGL product composition and the NGL and natural gas delivery points to those of the Partnership's physical equity volumes. The NGL hedges may be transacted as specific NGL hedges or as baskets of ethane, propane, normal butane, isobutane and natural gasoline based upon the Partnership's expected equity NGL composition. We believe this approach avoids uncorrelated risks resulting from employing hedges on crude oil or other petroleum products as "proxy" hedges of NGL prices. The Partnership's natural gas and NGL hedges are settled using published index prices for delivery at various locations, which closely approximate the Partnership's actual natural gas and NGL delivery points.

The Partnership hedges a portion of its condensate sales using crude oil hedges that are based on the NYMEX futures contracts for West Texas Intermediate light, sweet crude, which approximates the prices received for condensate. This necessarily exposes the Partnership to a market differential risk if the NYMEX futures do not move in exact parity with the sales price of its underlying condensate equity volumes.

At March 31, 2013, the notional volumes of the Partnership's commodity hedges for equity volumes were:

Commodity	Instrument	Unit	2013		2014		2015		2016
Natural Gas	Swaps	MMBtu/d		31,108		25,500		12,001		5,000
NGL	Swaps	Bbl/d		5,650		1,000		-		-
Condensate	Swaps	Bbl/d		1,962		1,450		-		-

The Partnership also enters into derivative instruments to help manage other short-term commodity-related business risks. The Partnership has not designated these derivatives as hedges, and records changes in fair value and cash settlements to revenues.

The Partnership's derivative contracts are subject to netting arrangements that allow net cash settlement of offsetting asset and liability positions with the same counterparty. We record derivative assets and liabilities on our Consolidated Balance Sheets on a gross basis, without considering the effect of master netting arrangements. The following schedules reflect the fair values of our derivative instruments and their location in our Consolidated Balance Sheets as well as pro forma reporting assuming that we reported derivatives subject to master netting agreements on a net basis:

		Fair Value as of March 31, 2013						Fair Value as of December 31, 2012
Balance Sheet		Derivative			Derivative			Derivative			Derivative
Location		Assets			Liabilities			Assets			Liabilities
Derivatives designated as hedging instruments
Commodity contracts	Current		$	18.1		$	8.1		$	29.2		$	7.2
Long-term				3.2			5.0			5.1			4.8
Total derivatives designated as hedging instruments			$	21.3		$	13.1		$	34.3		$	12.0

Derivatives not designated as hedging instruments
Commodity contracts	Current		$	0.1		$	0.1		$	0.1		$	0.2
Long-term				-			-			-			-
Total derivatives not designated as hedging instruments			$	0.1		$	0.1		$	0.1		$	0.2

Total current position			$	18.2		$	8.2		$	29.3		$	7.4
Total long-term position				3.2			5.0			5.1			4.8
Total derivatives			$	21.4		$	13.2		$	34.4		$	12.2

The pro forma impact of reporting derivatives in the Consolidated Balance Sheet is determined as follows:

	Gross Presentation						Pro forma Net Presentation
	Asset			Liability			Asset			Liability
March 31, 2013	Position			Position			Position			Position
Current position
Counterparties with offsetting position		$	16.3		$	7.1		$	9.2		$	-
Counterparties without offsetting position - assets			1.9			-			1.9			-
Counterparties without offsetting position - liabilities			-			1.1			-			1.1
			18.2			8.2			11.1			1.1
Long-term position
Counterparties with offsetting position			3.2			0.9			2.3			-
Counterparties without offsetting position - assets			-			-			-			-
Counterparties without offsetting position - liabilities			-			4.1			-			4.1
			3.2			5.0			2.3			4.1
Total derivatives
Counterparties with offsetting position			19.5			8.0			11.5			-
Counterparties without offsetting position - assets			1.9			-			1.9			-
Counterparties without offsetting position - liabilities			-			5.2			-			5.2
		$	21.4		$	13.2		$	13.4		$	5.2

December 31, 2012
Current position
Counterparties with offsetting position		$	23.8		$	7.4		$	16.4		$	-
Counterparties without offsetting position - assets			5.5			-			5.5			-
Counterparties without offsetting position - liabilities			-			-			-			-
			29.3			7.4			21.9			-
Long-term position
Counterparties with offsetting position			4.4			2.8			1.6			-
Counterparties without offsetting position - assets			0.7			-			0.7			-
Counterparties without offsetting position - liabilities			-			2.0			-			2.0
			5.1			4.8			2.3			2.0
Total derivatives
Counterparties with offsetting position			28.2			10.2			18.0			-
Counterparties without offsetting position - assets			6.2			-			6.2			-
Counterparties without offsetting position - liabilities			-			2.0			-			2.0
		$	34.4		$	12.2		$	24.2		$	2.0

The fair value of the Partnership's derivative instruments, depending on the type of instrument, was determined by the use of present value methods or standard option valuation models with assumptions about commodity prices based on those observed in underlying markets.

The estimated fair value of the Partnership's derivative instruments was a net asset of $8.2 million as of March 31, 2013, net of an adjustment for credit risk. The credit risk adjustment is based on the default probabilities by year as indicated by market quotes for the counterparties' credit default swap rates. These default probabilities have been applied to the unadjusted fair values of the derivative instruments to arrive at the credit risk adjustment, which was immaterial for all periods presented.

The Partnership's payment obligations in connection with substantially all of these hedging transactions and any additional credit exposure due to a rise in natural gas, NGL and crude oil prices relative to the fixed prices set forth in the hedges are secured by a first priority lien in the collateral securing its senior secured indebtedness that ranks equal in right of payment with liens granted in favor of its senior secured lenders.

The following tables reflect amounts recorded in other comprehensive income ("OCI") and amounts reclassified from OCI to revenue and expense for the periods indicated:

	Gain (Loss) Recognized in OCI on Derivatives
Derivatives in	(Effective Portion)
Cash Flow Hedging	Three Months Ended March 31,
Relationships	2013			2012
Commodity contracts		(7.6	)		15.5
	$	(7.6	)	$	15.5

	Gain (Loss) Reclassified from OCI into Income
	(Effective Portion)
	Three Months Ended March 31,
Location of Gain (Loss)		2013			2012
Interest expense, net	$	(1.7	)	$	(2.3	)
Revenues		6.6			2.5
	$	4.9		$	0.2

Hedge ineffectiveness was immaterial for all periods presented.

Our consolidated earnings are also affected by the Partnership's use of the mark-to-market method of accounting for derivative instruments that do not qualify for hedge accounting or that have not been designated as hedges. The changes in fair value of these instruments are recorded on the balance sheet and through earnings (i.e., using the "mark-to-market" method) rather than being deferred until the anticipated transaction settles. The use of mark-to-market accounting for financial instruments can cause non-cash earnings volatility due to changes in the underlying commodity price indices. Gain (loss) recognized on derivatives not designated as hedging instruments was immaterial for all periods presented.

The following table shows the deferred gains (losses) included in accumulated OCI that will be reclassified into earnings through the end of 2016:

	March 31, 2013			December 31, 2012
Commodity hedges, before tax	$	1.1		$	3.2
Commodity hedges, after tax		0.6			1.9
Interest rate swaps, before tax		(1.0	)		(1.2	)
Interest rate swaps, after tax		(0.6	)		(0.7	)

As of March 31, 2013, deferred net gains of $10.8 million on commodity hedges and deferred net losses of $5.7 million on terminated interest rate swaps recorded in OCI are expected to be reclassified to revenue and interest expense during the next twelve months.

See Note 13 for additional disclosures related to derivative instruments and hedging activities.

- Definition

The entire disclosure for the entity's entire derivative instruments and hedging activities. Describes an entity's risk management strategies, derivatives in hedging activities and non-hedging derivative instruments, the assets, obligations, liabilities, revenues and expenses arising therefrom, and the amounts of and methodologies and assumptions used in determining the amounts of such items.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 133
-Paragraph 45
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 133
-Paragraph 44
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 30
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6887037&loc=d3e80784-113994

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1A
-URI http://asc.fasb.org/extlink&oid=6935481&loc=SL5579245-113959

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4B
-URI http://asc.fasb.org/extlink&oid=6935481&loc=SL5624163-113959

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4C
-URI http://asc.fasb.org/extlink&oid=6935481&loc=SL5624171-113959

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=6935481&loc=d3e41638-113959

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1B
-URI http://asc.fasb.org/extlink&oid=6935481&loc=SL5580258-113959

Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6935481&loc=SL5579240-113959

Reference 10: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=6935481&loc=d3e41641-113959

Reference 11: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6935481&loc=d3e41620-113959

Reference 12: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 25
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6886632&loc=d3e76258-113986

Reference 13: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4E
-URI http://asc.fasb.org/extlink&oid=6935481&loc=SL5624181-113959

Reference 14: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4A
-URI http://asc.fasb.org/extlink&oid=6935481&loc=SL5618551-113959

Reference 15: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4D
-URI http://asc.fasb.org/extlink&oid=6935481&loc=SL5624177-113959

Reference 16: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 30
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6887037&loc=d3e80748-113994

Reference 17: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4H
-URI http://asc.fasb.org/extlink&oid=6935481&loc=SL5624258-113959

Reference 18: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4K
-URI http://asc.fasb.org/extlink&oid=6935481&loc=SL5708775-113959

Reference 19: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=6935481&loc=d3e41635-113959

Reference 20: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(n))
-URI http://asc.fasb.org/extlink&oid=6881521&loc=d3e23780-122690

Reference 21: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4J
-URI http://asc.fasb.org/extlink&oid=6935481&loc=SL5708773-113959

Reference 22: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 30
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6441202&loc=d3e80720-113993

+ Details

Fair Value Measurements

3 Months Ended

Mar. 31, 2013

Fair Value Measurements [Abstract]

Fair Value Measurements

Note 13 — Fair Value Measurements

Under generally accepted accounting principles, our consolidated balance sheet reflects a mixture of measurement methods for financial assets and liabilities ("financial instruments"). Derivative financial instruments are reported at fair value in our consolidated balance sheet. Other financial instruments are reported at historical cost or amortized cost in our consolidated balance sheet, with fair value measurements for these instruments provided as supplemental information.

The following is additional qualitative and quantitative disclosures regarding fair value measurements of financial instruments.

Fair Value of Derivative Financial Instruments

The Partnership's derivative instruments consist of financially settled commodity swap and option contracts and fixed price commodity contracts with certain counterparties. The Partnership determines the fair value of its derivative contracts using a discounted cash flow model for swaps and a standard option pricing-model for options, based on inputs that are readily available in public markets. The Partnership has consistently applied these valuation techniques in all periods presented and we believe the Partnership has obtained the most accurate information available for the types of derivative contracts the Partnership holds.

The fair values of the Partnership's derivative instruments, which aggregate to a net asset position of $8.2 million as of March 31, 2013, are sensitive to changes in forward pricing on natural gas, NGLs and crude oil. This asset position reflects the present value, adjusted for counterparty credit risk, of the amount the Partnership expects to receive in the future on its derivative contracts. If forward pricing on natural gas, NGLs and crude oil were to increase by 10%, the result would be a fair value reflecting a net liability of $18.7 million, ignoring an adjustment for counterparty credit risk. If forward pricing on natural gas, NGLs and crude oil were to decrease by 10%, the result would be a fair value reflecting a net asset of $35.1 million, ignoring an adjustment for counterparty credit risk.

Fair Value of Other Financial Instruments

The contingent consideration obligation related to the Partnership's Badlands acquisition is reported at fair value. Due to their cash or near-cash nature, the carrying value of other financial instruments included in working capital (i.e., cash and cash equivalents, accounts receivable, accounts payable) approximates their fair value. As such, long-term debt is primarily the other financial instrument for which our carrying value could vary significantly from fair value. We determined the supplemental fair value disclosures for our long-term debt as follows:

•	senior secured revolving credit facilities and the Partnership's Securitization Facility are based on carrying value which approximates fair value as its interest rate is based on prevailing market rates;

•	senior unsecured notes are based on quoted market prices derived from trades of the debt.

Fair Value Hierarchy

We categorize the inputs to the fair value measurements using a three-tier fair value hierarchy that prioritizes the significant inputs used in measuring fair value:

•	Level 1 – observable inputs such as quoted prices in active markets;

•	Level 2 – inputs other than quoted prices in active markets that we can directly or indirectly observe to the extent that the markets are liquid for the relevant settlement periods; and

•	Level 3 – unobservable inputs in which little or no market data exists, therefore we must develop our own assumptions.

The following table shows a breakdown by fair value hierarchy category for (1) financial instruments measurements included in our consolidated balance sheet at fair value and (2) supplemental fair value disclosures for other financial instruments:

	March 31, 2013
	Carrying Value			Fair Value
	Carrying Value			Total			Level 1			Level 2			Level 3
Financial Instruments Recorded on Our Consolidated Balance Sheet at Fair Value:
Assets from commodity derivative contracts		$	21.4		$	21.4		$	-		$	21.4		$	-
Liabilities from commodity derivative contracts			13.2			13.2			-			12.2			1.0
Badlands contingent consideration liability			15.6			15.6			-			-			15.6
Financial Instruments Recorded on Our Consolidated Balance Sheet at Carrying Value:
Cash and cash equivalents			112.7			112.7
TRC Senior secured revolving credit facility			72.0			72.0			-			72.0			-
Partnership's Senior secured revolving credit facility			565.0			565.0			-			565.0			-
Partnership's Senior unsecured notes			1,774.0			1,949.8			-			1,949.8			-
Partnership's accounts receivable securitization facility			111.4			111.4			-			111.4			-

	December 31, 2012
	Carrying Value			Fair Value
	Carrying Value			Total			Level 1			Level 2			Level 3
Financial Instruments Recorded on Our Consolidated Balance Sheet at Fair Value:
Assets from commodity derivative contracts		$	34.3		$	34.3		$	-		$	34.3		$	-
Liabilities from commodity derivative contracts			12.1			12.1			-			11.5			0.6
Badlands contingent consideration liability			15.3			15.3			-			-			15.3
Financial Instruments Recorded on Our Consolidated Balance Sheet at Carrying Value:
Cash and cash equivalents			76.3			76.3
TRC Senior secured revolving credit facility			82.0			82.0			-			82.0			-
Partnership's Senior secured revolving credit facility			620.0			620.0			-			620.0			-
Partnership's Senior unsecured notes			1,773.3			1,945.2			-			1,945.2			-

Additional Information Regarding Level 3 Fair Value Measurements

As of March 31, 2013, we reported certain of the Partnership's natural gas basis swaps at fair value using Level 3 inputs due to such derivatives not having observable market prices for substantially the full term of the derivative asset or liability. For valuations that include both observable and unobservable inputs, if the unobservable input is determined to be significant to the overall inputs, the entire valuation is categorized in Level 3. This includes derivatives valued using indicative price quotations whose contract length extends into unobservable periods.

The fair value of these natural gas basis swaps is determined using a discounted cash flow valuation technique based on a forward commodity basis curve. For these derivatives, the primary input to the valuation model is the forward commodity basis curve, which is based on observable or public data sources and extrapolated when observable prices are not available.

As of March 31, 2013, the Partnership had five natural gas basis swaps categorized as Level 3. The significant unobservable inputs used in the fair value measurements of the Partnership's Level 3 derivatives are the forward natural gas basis curves, for which a significant portion of the derivative's term is beyond available forward pricing. The change in the fair value of Level 3 derivatives associated with a 10% change in the forward basis curve where prices are not observable is immaterial.

As of March 31, 2013, the Partnership had a contingent consideration liability, which was included in the preliminary valuation of the Badlands acquisition (see Note 4). The preliminary fair value was determined by a probability-based model measuring the likelihood of meeting certain volumetric measures identified in the MIPSA. Consequently, as these probability-based inputs are not observable, the entire valuation of the contingent consideration is categorized in Level 3.

The following table sets forth a reconciliation of the changes in the fair value of our and the Partnership's financial instruments classified as Level 3 in the fair value hierarchy:

	Commodity Derivative Contracts		Contingent Liability
Balance, December 31, 2012	$	0.6	$	15.3
Loss included in Revenue		0.4		-
Loss included in Other expense		-		0.3
Balance, March 31, 2013	$	1.0	$	15.6

The losses for the period included in earnings are attributable to the change in unrealized losses of liabilities held at the reporting dates. There have been no transfers of assets or liabilities between the three levels of the fair value hierarchy during the three months ended March 31, 2013.

- Definition

Tabular disclosure of the fair value measurement of assets and liabilities which includes [financial] instruments measured at fair value that are classified in stockholders' equity. Such assets and liabilities may be measured on a recurring or nonrecurring basis. The disclosures which may be required or desired include: (1) for assets and liabilities measured on a recurring basis, disclosure may include: (a) the fair value measurements at the reporting date; (b) the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets or liabilities (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3); (c) for fair value measurements using significant unobservable inputs (Level 3), a reconciliation of the beginning and ending balances, separately presenting changes during the period attributable to the following: (i) total gains or losses for the period (realized and unrealized), segregating those gains or losses included in earnings (or changes in net assets), and a description of where those gains or losses included in earnings (or changes in net assets) are reported in the statement of income (or activities); (ii) purchases, sales, issuances, and settlements (net); (iii) transfers in and transfers out of Level 3 (for example, transfers due to changes in the observability of significant inputs); (d) the amount of the total gains or losses for the period in subparagraph (c) (i) above included in earnings (or changes in net assets) that are attributable to the change in unrealized gains or losses relating to those assets and liabilities still held at the reporting date and a description of where those unrealized gains or losses are reported in the statement of income (or activities); (e) the valuation technique(s) used to measure fair value and a discussion of changes in valuation techniques, if any, during the period and (2) for assets and liabilities that are measured at fair value on a nonrecurring basis (for example, impaired assets) disclosure may include, in addition to (a) above: (a) the reasons for the fair value measurements recorded; (b) the same as (b) above; (c) for fair value measurements using significant unobservable inputs (Level 3), a description of the inputs and the information used to develop the inputs; and (d) the valuation technique(s) used to measure fair value and a discussion of changes, if any, in the valuation technique(s) used to measure similar assets and/or liabilities in prior periods. Where the quoted price in an active market for the identical liability is not available, the Level 1 input is the quoted price of an identical liability when traded as an asset.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 107
-Paragraph 10
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 157
-Paragraph 32
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 157
-Paragraph 33
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 157
-Paragraph 6
-Footnote 4
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6925170&loc=d3e19207-110258

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6925170&loc=d3e19190-110258

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=6925170&loc=d3e19279-110258

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=6925170&loc=d3e19296-110258

+ Details

Commitments and Contingencies	3 Months Ended
Commitments and Contingencies	Mar. 31, 2013
Commitments and Contingencies [Abstract]
Commitments and Contingencies	Note 14 — Commitments and Contingencies Legal Proceedings We are a party to various legal proceedings and/or regulatory proceedings and certain claims, suits and complaints arising in the ordinary course of business that have been filed or are pending against us. We believe all such matters are without merit or involve amounts, which, if resolved unfavorably, would not have a material effect on our financial position, results of operations, or cash flows.

- Definition

The entire disclosure for commitments and contingencies.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name FASB Interpretation (FIN)
-Number 14
-Paragraph 3
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 5
-Paragraph 9, 10, 11, 12
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.25)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=6952336&loc=d3e14435-108349

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 460
-SubTopic 10
-Section 50
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=6398077&loc=d3e12565-110249

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 440
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6394976&loc=d3e25287-109308

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6449706&loc=d3e16207-108621

+ Details

Segment Information

3 Months Ended

Mar. 31, 2013

Segment Information [Abstract]

Segment Information

Note 15 — Segment Information

The Partnership reports its operations in two divisions: (i) Gathering and Processing, consisting of two reportable segments – (a) Field Gathering and Processing and (b) Coastal Gathering and Processing; and (ii) Logistics and Marketing consisting of two reportable segments – (a) Logistics Assets and (b) Marketing and Distribution. The financial results of its hedging activities are reported in Other.

The Partnership's Gathering and Processing division includes assets used in the gathering of natural gas produced from oil and gas wells and processing this raw natural gas into merchantable natural gas by extracting NGLs and removing impurities. The Field Gathering and Processing segment's assets are located in North Texas and the Permian Basin of West Texas and New Mexico. With the Badlands acquisition on December 31, 2012, this segment's assets now includes the Badlands crude oil and natural gas gathering, terminaling and processing assets in North Dakota. Because the acquisition closed on December 31, 2012, Badlands had no operational impact for 2012. The Coastal Gathering and Processing segment's assets are located in the onshore and near offshore regions of the Louisiana Gulf Coast and the Gulf of Mexico.

The Partnership's Logistics and Marketing division is also referred to as its Downstream Business. The Partnership's Downstream Business includes all the activities necessary to convert mixed NGLs into NGL products and provides certain value added services such as storing, terminaling, distributing and marketing of NGLs, refined petroleum products and crude oil. It also includes certain natural gas supply and marketing activities in support of the Partnership's other operations, as well as transporting natural gas and NGLs.

The Partnership's Logistics Assets segment is involved in transporting, storing, and fractionating mixed NGLs; storing, terminaling, and transporting finished NGLs, including services for exported LPGs; and storing and terminaling refined petroleum products and crude oil. These assets are generally connected to, and supplied in part by, the Partnership's Gathering and Processing segments and are predominantly located in Mont Belvieu, Texas and Southwestern Louisiana.

The Partnership's Marketing and Distribution segment covers activities required to distribute and market raw and finished NGLs and all natural gas marketing activities. It includes (1) marketing the Partnership's own NGL production and purchasing NGL products in selected United States markets; (2) providing LPG balancing services to refinery customers; (3) transporting, storing and selling propane and providing related propane logistics services to multi-state retailers, independent retailers and other end-users; providing propane and services to LPG exporters; and (4) marketing natural gas available to the Partnership from its Gathering and Processing division and the purchase and resale and other value added activities related to third-party natural gas in selected United States markets.

Other contains the results of the Partnership's commodity hedging activities included in operating margin. Eliminations of inter-segment transactions are reflected in the corporate and eliminations column.

Segment information is shown in the following tables. We have segregated the following segment information between Partnership and non-Partnership activities. Partnership activities have been presented on a common control accounting basis, which reflects the drop-down transactions between us and the Partnership as if they occurred in prior periods similar to a pooling of interests. The non-Partnership results include activities related to certain assets and liabilities contractually excluded from the drop-down transactions and certain historical hedge activities that could not be reflected under GAAP in the Partnership common control results.

	Three Months Ended March 31, 2013
	Partnership
	Field Gathering and Processing		Coastal Gathering and Processing		Logistics Assets		Marketing and Distribution		Other		Corporate and Eliminations			TRC Non-Partnership		Consolidated
Revenues
Sales of commodities	$	38.1	$	69.6	$	32.9	$	1,136.5	$	6.6	$	-		$	-	$	1,283.7
Fees from midstream services		20.2		8.8		47.1		38.0		-		-			-		114.1
		58.3		78.4		80.0		1,174.5		6.6		-			-		1,397.8
Intersegment revenues
Sales of commodities		273.0		151.9		0.9		110.5		-		(536.3	)		-		-
Fees from midstream services		0.9		-		36.6		6.4		-		(43.9	)		-		-
		273.9		151.9		37.5		116.9		-		(580.2	)		-		-
Revenues	$	332.2	$	230.3	$	117.5	$	1,291.4	$	6.6	$	(580.2	)	$	-	$	1,397.8
Operating margin	$	53.8	$	23.5	$	56.3	$	34.0	$	6.6	$	-		$	-	$	174.2
Other financial information:
Total assets	$	2,854.7	$	416.3	$	1,210.7	$	436.9	$	21.4	$	134.2		$	74.3	$	5,148.5
Capital expenditures	$	96.1	$	6.5	$	103.7	$	-	$	-	$	0.6		$	-	$	206.9

	Three Months Ended March 31, 2012
	Partnership
	Field Gathering and Processing		Coastal Gathering and Processing		Logistics Assets		Marketing and Distribution		Other		Corporate and Eliminations			TRC Non-Partnership		Consolidated
Revenues
Sales of commodities	$	45.4	$	59.8	$	45.7	$	1,417.2	$	1.4	$	-		$	0.3	$	1,569.8
Fees from midstream services		10.9		3.7		38.7		22.7		-		-			-		76.0
		56.3		63.5		84.4		1,439.9		1.4		-			0.3		1,645.8
Intersegment revenues
Sales of commodities		317.4		220.0		-		132.0		-		(669.4	)		-		-
Fees from midstream services		0.3		0.1		24.0		9.3		-		(33.7	)		-		-
		317.7		220.1		24.0		141.3		-		(703.1	)		-		-
Revenues	$	374.0	$	283.6	$	108.4	$	1,581.2	$	1.4	$	(703.1	)	$	0.3	$	1,645.8
Operating margin	$	73.0	$	46.3	$	43.0	$	26.1	$	1.4	$	-		$	0.2	$	190.0
Other financial information:
Total assets	$	1,661.1	$	422.5	$	823.0	$	507.9	$	49.5	$	123.1		$	111.3	$	3,698.4
Capital expenditures	$	26.2	$	2.0	$	60.1	$	9.1	$	-	$	0.6		$	0.3	$	98.3

The following table shows our consolidated revenues by product and service for the periods presented:

	Three Months Ended March 31,
	2013		2012
Sales of commodities
Natural gas sales	$	255.3	$	202.9
NGL sales		963.5		1,290.2
Condensate sales		27.1		29.0
Petroleum products		31.3		45.5
Derivative activities		6.5		2.2
		1,283.7		1,569.8
Fees from midstream services
Fractionating and treating fees		29.7		26.9
Storage, terminaling, transportation and export fees		60.2		30.5
Gas gathering and processing fees		18.5		8.6
Other		5.7		10.0
		114.1		76.0
Total revenues	$	1,397.8	$	1,645.8

The following table shows a reconciliation of operating margin to net income for the periods presented:

	Three Months Ended March 31,
	2013			2012
Reconciliation of operating margin to net income
Operating margin	$	174.2		$	190.0
Depreciation and amortization expense		(64.0	)		(47.4	)
General and administrative expense		(36.3	)		(34.9	)
Interest expense, net		(32.1	)		(30.5	)
Income tax expense		(9.4	)		(10.1	)
Other, net		1.4			2.1
Net income	$	33.8		$	69.2

- Definition

The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 131
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 34
-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8981-108599

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 35
-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8984-108599

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 42
-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e9054-108599

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 40
-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e9031-108599

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 31
-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8924-108599

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8538-108599

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 30
-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8906-108599

Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 41
-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e9038-108599

Reference 10: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 29
-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8864-108599

Reference 11: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 33
-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8971-108599

Reference 12: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 26
-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8844-108599

Reference 13: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8380-108599

Reference 14: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 12
-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8595-108599

Reference 15: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 32
-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8933-108599

+ Details

Significant Accounting Policies (Policies)	3 Months Ended
Significant Accounting Policies (Policies)	Mar. 31, 2013
Significant Accounting Policies [Abstract]
Accounting Policy Updates/Revisions	Accounting Policy Updates/Revisions The accounting policies that we follow are set forth in Note 3 of the Notes to Consolidated Financial Statements in our Annual Report on Form 10-K for the year ended December 31, 2012. Significant updates or revisions to these policies during the three months ended March 31, 2013 are shown below.
Accounts Receivable Securitization Facility	Accounts Receivable Securitization Facility Under the Partnership's Accounts Receivable Securitization Facility (the "Securitization Facility'), proceeds from the sales of certain receivables are treated as collateralized borrowings in our financial statements. All amounts outstanding under the Securitization Facility are reflected as long-term debt on our balance sheets to the extent that the Partnership has the ability and intent to fund the Securitization Facility's borrowings on a long-term basis. Proceeds and repayments under the Securitization Facility are reflected as cash flows from financing activities on our statements of cash flows.
Intangible Assets	Intangible Assets Intangible assets arose from producer dedications under long-term contracts and customer relationships associated with businesses acquisitions. The fair value of these acquired intangible assets was determined at the date of acquisition based on the present value of estimated future cash flows. Amortization expense attributable to these assets is recorded in a manner that closely resembles the expected pattern in which we benefit from services provided to customers.
Recent Accounting Pronouncements	Recent Accounting Pronouncements In January 2013, the FASB issued Accounting Standards Update No. 2013-01, Balance Sheet (Topic 210): Clarifying the Scope of Disclosures about Offsetting Assets and Liabilities, which clarifies that ASU 2011-11, Balance Sheet (Topic 210): Disclosures about Offsetting Assets and Liabilities, applies to financial instruments or derivative transactions accounted for under ASC 815. The amendments require disclosures to present both gross and net amounts of derivative assets and liabilities that are subject to master netting arrangements with counterparties. We currently present the Partnership's derivative assets and liabilities gross on our statement of financial position. We have provided additional disclosures regarding the gross and net amounts of derivative assets and liabilities in Note 12 in accordance with these new standards updates.

- Definition

Disclosure of accounting policy for intangible assets. This accounting policy may address both intangible assets subject to amortization and those that are not. The following also may be disclosed: (1) a description of intangible assets (2) the estimated useful lives of those assets (3) the amortization method used (4) how the entity assesses and measures impairment of such assets (5) how future cash flows are estimated (6) how the fair values of such asset are determined.

+ References + Details

Business Acquisitions (Tables)

3 Months Ended

Mar. 31, 2013

Business Acquisitions [Abstract]

Pro forma consolidated results of operations

	Year Ended December 31, 2012				Three Months Ended
	As reported in 10-K		Pro forma		March 31, 2012
	( In millions except per share amounts)
Revenues	$	5,885.7	$	5,909.9	$	1,648.7
Net income		159.3		129.5		59.2
Less: Net income attributable to noncontrolling interests		121.2		83.5		47.3
Net income attributable to Targa Resources Corp.	$	38.1	$	46.0	$	11.9

Net income per common share - Basic	$	0.93	$	1.12	$	0.29
Net income per common share - Diluted	$	0.91	$	1.10	$	0.28

- Definition

Tabular disclosure of pro forma results of operations for a material business acquisition or series of individually immaterial business acquisitions that are material in the aggregate.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 141
-Paragraph 54
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 141
-Paragraph 55
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 141R
-Paragraph 68
-Subparagraph r(2, 3)
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (h)(2)-(3)
-URI http://asc.fasb.org/extlink&oid=6972119&loc=d3e1392-128463

+ Details

Inventories (Tables)

3 Months Ended

Mar. 31, 2013

Inventories [Abstract]

Components of inventory

The components of inventories consisted of the following:

	March 31, 2013		December 31, 2012
Natural gas liquids	$	44.2	$	82.3
Materials and supplies		21.8		17.1
	$	66.0	$	99.4

Property, Plant and Equipment and Intangible Assets (Tables)

3 Months Ended

Mar. 31, 2013

Property, Plant and Equipment and Intangible Assets [Abstract]

Component of property plant and equipment and intangible assets

	March 31, 2013									December 31, 2012
	Targa Resources Partners LP			TRC Non-Partnership			Targa Resources Corp. Consolidated			Targa Resources Partners LP			TRC Non-Partnership			Targa Resources Corp. Consolidated			Estimated Useful Lives (In Years)
Gathering systems	$	2,048.0		$	-		$	2,048.0		$	1,975.3		$	-		$	1,975.3		5 to 20
Processing and fractionation facilities		1,262.1			6.6			1,268.7			1,251.6			6.6			1,258.2		5 to 25
Terminaling and storage facilities		502.6			-			502.6			462.0			-			462.0		5 to 25
Transportation assets		292.6			-			292.6			292.5			-			292.5		10 to 25
Other property, plant and equipment		86.7			0.2			86.9			84.6			0.2			84.8		3 to 25
Land		87.1			-			87.1			87.1			-			87.1			-
Construction in progress		633.7			-			633.7			548.1			-			548.1			-
Property, plant and equipment	$	4,912.8		$	6.8		$	4,919.6		$	4,701.2		$	6.8		$	4,708.0
Accumulated depreciation		(1,225.1	)		(2.1	)		(1,227.2	)		(1,168.0	)		(2.0	)		(1,170.0	)
Property, plant and equipment, net	$	3,687.7		$	4.7		$	3,692.4		$	3,533.2		$	4.8		$	3,538.0

Intangible assets	$	680.8		$	-		$	680.8		$	680.8		$	-		$	680.8			20
Accumulated amortization		(6.7	)		-			(6.7	)		-			-			-
Intangible assets, net	$	674.1		$	-		$	674.1		$	680.8		$	-		$	680.8

Accounts Payable and Accrued Liabilities (Tables)

3 Months Ended

Mar. 31, 2013

Accounts Payable and Accrued Liabilities [Abstract]

Schedule of accounts payable and accrued liabilities

The components of accounts payable and accrued liabilities consisted of the following:

	March 31, 2013		December 31, 2012
Commodities	$	383.5	$	416.8
Other goods and services		141.0		154.4
Interest		35.3		39.5
Compensation and benefits		30.4		40.7
Other		30.9		27.6
	$	621.1	$	679.0

Debt Obligations (Tables)

3 Months Ended

Mar. 31, 2013

Debt Obligations [Abstract]

Schedule of outstanding debt

	March 31, 2013			December 31, 2012
Long-term debt:
Non-Partnership obligations:
TRC Senior secured revolving credit facility, variable rate, due October 2017 (1)	$	72.0		$	82.0
Obligations of the Partnership: (2)
Senior secured revolving credit facility, variable rate, due October 2017 (3)		565.0			620.0
Senior unsecured notes, 11¼% fixed rate, due July 2017		72.7			72.7
Unamortized discount		(2.4	)		(2.5	)
Senior unsecured notes, 7⅞% fixed rate, due October 2018		250.0			250.0
Senior unsecured notes, 6⅞% fixed rate, due February 2021		483.6			483.6
Unamortized discount		(29.9	)		(30.5	)
Senior unsecured notes, 6⅜% fixed rate, due August 2022		400.0			400.0
Senior unsecured notes, 5¼% fixed rate, due May 2023		600.0			600.0
Accounts receivable securitization facility, due January 2014 (4)		111.4			-
Total long-term debt	$	2,522.4		$	2,475.3
Irrevocable standby letters of credit:
Letters of credit outstanding under TRC Senior secured credit facility (1)	$	-		$	-
Letters of credit outstanding under the Partnership senior secured revolving credit facility (3)		53.2			45.3
	$	53.2		$	45.3

(1)	As of March 31, 2013, $78.0 million of TRC's $150.0 million credit facility was available.

(2)	While we consolidate the debt of the Partnership in our financial statements, we do not have the obligation to make interest payments or debt payments with respect to the debt of the Partnership.

(3)	As of March 31, 2013, availability under the Partnership's $1.2 billion senior secured revolving credit facility was $581.8 million.

(4)

Range of interest rates paid and weighted average interest rate paid on our variable-rate debt obligations

	Range of Interest Rates Incurred			Weighted Average Interest Rate Incurred
TRC senior secured revolving credit facility		2.9% - 3.0	%		3.0	%
Partnership's senior secured revolving credit facility		1.9% - 4.5	%		2.2	%
Partnership's accounts receivable securitization facility		0.9	%		0.9	%

- Definition

Tabular disclosure of long-debt instruments or arrangements, including identification, terms, features, collateral requirements and other information necessary to a fair presentation. These are debt arrangements that originally required repayment more than twelve months after issuance or greater than the normal operating cycle of the entity, if longer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 22
-Article 5

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 1A
-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28541-108399

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21475-112644

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21506-112644

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21538-112644

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 7
-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21521-112644

Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=6584090&loc=d3e28878-108400

Reference 10: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 470
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=6479336&loc=d3e64711-112823

Reference 11: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(e),(f))
-URI http://asc.fasb.org/extlink&oid=6881521&loc=d3e23780-122690

+ Details

Partnership Units and Related Matters (Tables)

3 Months Ended

Mar. 31, 2013

Partnership Units and Related Matters [Abstract]

Schedule of distributions

		Distributions
Three Months Ended	Date Paid or to be Paid	Limited Partners		General Partner					Distributions to Targa Resources Corp.		Distributions per limited partner unit
Three Months Ended	Date Paid or to be Paid	Common		Incentive		2%	Total		Distributions to Targa Resources Corp.		Distributions per limited partner unit

(In millions, except per unit amounts)
March 31, 2013	May 15, 2013	$	71.7	$	22.1	1.9	$	95.7	$	33.0	$	0.6975
December 31, 2012	February 14, 2013		69.0		20.1	1.8		90.9		30.7		0.6800

- Definition

Tabular disclosure of payments of cash or stock or units made to members or limited partners of the LLC or LP during an accounting period.

+ References + Details

Common Stock and Related Matters (Tables)

3 Months Ended

Mar. 31, 2013

Common Stock and Related Matters [Abstract]

Common Stock and Related Matters

The following table details the dividends declared and/or paid by us during the three months ended March 31, 2013:

Three Months Ended	Date Paid or to be Paid	Total Dividend Declared		Amount of Dividend Paid		Accrued Dividends (1)		Dividend Declared per Share of Common Stock

(In millions, except per share amounts)
March 31, 2013	May 16, 2013	$	21.0	$	20.6	$	0.4	$	0.49500
December 31, 2012	February 15, 2013		19.4		19.0		0.4		0.45750

(1)	Represents accrued dividends on the restricted shares that are payable upon vesting.

Earnings per Common Share (Tables)

3 Months Ended

Mar. 31, 2013

Earnings per Common Share [Abstract]

Earnings per Common Share

The following table sets forth a reconciliation of net income and weighted average shares outstanding used in computing basic and diluted net income per common share:

	Three Months Ended March 31,
	2013		2012
Net income	$	33.8	$	69.2
Less: Net income attributable to noncontrolling interests		20.4		59.6
Net income attributable to common shareholders	$	13.4	$	9.6

Weighted average shares outstanding - basic		41.6		41.0

Net income available per common share - basic	$	0.32	$	0.23

Weighted average shares outstanding		41.6		41.0
Dilutive effect of unvested stock awards		0.4		0.8
Weighted average shares outstanding - diluted		42.0		41.8

Net income available per common share - diluted	$	0.32	$	0.23

Derivative Instruments and Hedging Activities (Tables)

3 Months Ended

Mar. 31, 2013

Derivative Instruments and Hedging Activities [Abstract]

Notional volume of commodity hedges

At March 31, 2013, the notional volumes of the Partnership's commodity hedges for equity volumes were:

Commodity	Instrument	Unit	2013		2014		2015		2016
Natural Gas	Swaps	MMBtu/d		31,108		25,500		12,001		5,000
NGL	Swaps	Bbl/d		5,650		1,000		-		-
Condensate	Swaps	Bbl/d		1,962		1,450		-		-

Fair values of derivative instruments

		Fair Value as of March 31, 2013						Fair Value as of December 31, 2012
Balance Sheet		Derivative			Derivative			Derivative			Derivative
Location		Assets			Liabilities			Assets			Liabilities
Derivatives designated as hedging instruments
Commodity contracts	Current		$	18.1		$	8.1		$	29.2		$	7.2
Long-term				3.2			5.0			5.1			4.8
Total derivatives designated as hedging instruments			$	21.3		$	13.1		$	34.3		$	12.0

Derivatives not designated as hedging instruments
Commodity contracts	Current		$	0.1		$	0.1		$	0.1		$	0.2
Long-term				-			-			-			-
Total derivatives not designated as hedging instruments			$	0.1		$	0.1		$	0.1		$	0.2

Total current position			$	18.2		$	8.2		$	29.3		$	7.4
Total long-term position				3.2			5.0			5.1			4.8
Total derivatives			$	21.4		$	13.2		$	34.4		$	12.2

Pro forma impact of derivatives net in Consolidated Balance Sheet

The pro forma impact of reporting derivatives in the Consolidated Balance Sheet is determined as follows:

	Gross Presentation						Pro forma Net Presentation
	Asset			Liability			Asset			Liability
March 31, 2013	Position			Position			Position			Position
Current position
Counterparties with offsetting position		$	16.3		$	7.1		$	9.2		$	-
Counterparties without offsetting position - assets			1.9			-			1.9			-
Counterparties without offsetting position - liabilities			-			1.1			-			1.1
			18.2			8.2			11.1			1.1
Long-term position
Counterparties with offsetting position			3.2			0.9			2.3			-
Counterparties without offsetting position - assets			-			-			-			-
Counterparties without offsetting position - liabilities			-			4.1			-			4.1
			3.2			5.0			2.3			4.1
Total derivatives
Counterparties with offsetting position			19.5			8.0			11.5			-
Counterparties without offsetting position - assets			1.9			-			1.9			-
Counterparties without offsetting position - liabilities			-			5.2			-			5.2
		$	21.4		$	13.2		$	13.4		$	5.2

December 31, 2012
Current position
Counterparties with offsetting position		$	23.8		$	7.4		$	16.4		$	-
Counterparties without offsetting position - assets			5.5			-			5.5			-
Counterparties without offsetting position - liabilities			-			-			-			-
			29.3			7.4			21.9			-
Long-term position
Counterparties with offsetting position			4.4			2.8			1.6			-
Counterparties without offsetting position - assets			0.7			-			0.7			-
Counterparties without offsetting position - liabilities			-			2.0			-			2.0
			5.1			4.8			2.3			2.0
Total derivatives
Counterparties with offsetting position			28.2			10.2			18.0			-
Counterparties without offsetting position - assets			6.2			-			6.2			-
Counterparties without offsetting position - liabilities			-			2.0			-			2.0
		$	34.4		$	12.2		$	24.2		$	2.0

Cash flow hedges included in accumulated other comprehensive income (loss)

The following tables reflect amounts recorded in other comprehensive income ("OCI") and amounts reclassified from OCI to revenue and expense for the periods indicated:

	Gain (Loss) Recognized in OCI on Derivatives
Derivatives in	(Effective Portion)
Cash Flow Hedging	Three Months Ended March 31,
Relationships	2013			2012
Commodity contracts		(7.6	)		15.5
	$	(7.6	)	$	15.5

	Gain (Loss) Reclassified from OCI into Income
	(Effective Portion)
	Three Months Ended March 31,
Location of Gain (Loss)		2013			2012
Interest expense, net	$	(1.7	)	$	(2.3	)
Revenues		6.6			2.5
	$	4.9		$	0.2

Schedule of gain (loss) on financial instruments

The following table shows the deferred gains (losses) included in accumulated OCI that will be reclassified into earnings through the end of 2016:

	March 31, 2013			December 31, 2012
Commodity hedges, before tax	$	1.1		$	3.2
Commodity hedges, after tax		0.6			1.9
Interest rate swaps, before tax		(1.0	)		(1.2	)
Interest rate swaps, after tax		(0.6	)		(0.7	)

- Definition

Tabular disclosure of the location and amount of gains and losses reported in the statement of financial performance, or when applicable, the statement of financial position. For example, (a) gains and losses recognized in the income statement on derivative instruments designated and qualifying as hedging instruments in fair value hedges and related hedged items designated and qualifying in fair value hedges and (b) gains and losses initially recognized in other comprehensive income on derivative instruments designated and qualifying as cash flow hedges.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4C
-URI http://asc.fasb.org/extlink&oid=6935481&loc=SL5624171-113959

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4A
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=6935481&loc=SL5618551-113959

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 133
-Paragraph 44C
-Subparagraph b
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 133
-Paragraph 205G
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

- Definition

Tabular disclosure of the location and fair value amounts of derivative instruments (and nonderivative instruments that are designated and qualify as hedging instruments) reported in the statement of financial position.

+ References + Details

- Definition

Tabular disclosure of pertinent information about a derivative or group of derivatives on a disaggregated basis, such as for individual instruments, or small groups of similar instruments. May include a combination of the type of instrument, risks being hedged, notional amount, hedge designation, related hedged item, inception date, maturity date, or other relevant item.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1A
-URI http://asc.fasb.org/extlink&oid=6935481&loc=SL5579245-113959

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4B
-URI http://asc.fasb.org/extlink&oid=6935481&loc=SL5624163-113959

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4C
-URI http://asc.fasb.org/extlink&oid=6935481&loc=SL5624171-113959

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=6935481&loc=d3e41678-113959

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(n)(2))
-URI http://asc.fasb.org/extlink&oid=6881521&loc=d3e23780-122690

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=6935481&loc=d3e41638-113959

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1B
-URI http://asc.fasb.org/extlink&oid=6935481&loc=SL5580258-113959

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6935481&loc=SL5579240-113959

Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=6935481&loc=d3e41641-113959

Reference 10: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6935481&loc=d3e41620-113959

Reference 11: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 25
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6886632&loc=d3e76258-113986

+ Details

Fair Value Measurements (Tables)

3 Months Ended

Mar. 31, 2013

Fair Value Measurements [Abstract]

Schedule of fair value, assets and liabilities measured on recurring basis

	March 31, 2013
	Carrying Value			Fair Value
	Carrying Value			Total			Level 1			Level 2			Level 3
Financial Instruments Recorded on Our Consolidated Balance Sheet at Fair Value:
Assets from commodity derivative contracts		$	21.4		$	21.4		$	-		$	21.4		$	-
Liabilities from commodity derivative contracts			13.2			13.2			-			12.2			1.0
Badlands contingent consideration liability			15.6			15.6			-			-			15.6
Financial Instruments Recorded on Our Consolidated Balance Sheet at Carrying Value:
Cash and cash equivalents			112.7			112.7
TRC Senior secured revolving credit facility			72.0			72.0			-			72.0			-
Partnership's Senior secured revolving credit facility			565.0			565.0			-			565.0			-
Partnership's Senior unsecured notes			1,774.0			1,949.8			-			1,949.8			-
Partnership's accounts receivable securitization facility			111.4			111.4			-			111.4			-

	December 31, 2012
	Carrying Value			Fair Value
	Carrying Value			Total			Level 1			Level 2			Level 3
Financial Instruments Recorded on Our Consolidated Balance Sheet at Fair Value:
Assets from commodity derivative contracts		$	34.3		$	34.3		$	-		$	34.3		$	-
Liabilities from commodity derivative contracts			12.1			12.1			-			11.5			0.6
Badlands contingent consideration liability			15.3			15.3			-			-			15.3
Financial Instruments Recorded on Our Consolidated Balance Sheet at Carrying Value:
Cash and cash equivalents			76.3			76.3
TRC Senior secured revolving credit facility			82.0			82.0			-			82.0			-
Partnership's Senior secured revolving credit facility			620.0			620.0			-			620.0			-
Partnership's Senior unsecured notes			1,773.3			1,945.2			-			1,945.2			-

Reconciliation of the changes in fair value of financial instruments classified as Level 3

The following table sets forth a reconciliation of the changes in the fair value of our and the Partnership's financial instruments classified as Level 3 in the fair value hierarchy:

	Commodity Derivative Contracts		Contingent Liability
Balance, December 31, 2012	$	0.6	$	15.3
Loss included in Revenue		0.4		-
Loss included in Other expense		-		0.3
Balance, March 31, 2013	$	1.0	$	15.6

- Definition

Tabular disclosure of the fair value measurement of liabilities using significant unobservable inputs (Level 3), a reconciliation of the beginning and ending balances, separately presenting changes during the period attributable to the following: (1) total gains or losses for the period (realized and unrealized), segregating those gains or losses included in earnings (or changes in net assets), and gains or losses recognized in other comprehensive income and a description of where those gains or losses included in earnings (or changes in net assets) are reported in the statement of income (or activities); (2) purchases, sales, issuances, and settlements (each type disclosed separately); and (3) transfers in and transfers out of Level 3 (for example, transfers due to changes in the observability of significant inputs) by class of liability.

+ References + Details

- Definition

Tabular disclosure of assets and liabilities, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3).

+ References + Details

Segment Information (Tables)

3 Months Ended

Mar. 31, 2013

Segment Information [Abstract]

Information by segment

	Three Months Ended March 31, 2013
	Partnership
	Field Gathering and Processing		Coastal Gathering and Processing		Logistics Assets		Marketing and Distribution		Other		Corporate and Eliminations			TRC Non-Partnership		Consolidated
Revenues
Sales of commodities	$	38.1	$	69.6	$	32.9	$	1,136.5	$	6.6	$	-		$	-	$	1,283.7
Fees from midstream services		20.2		8.8		47.1		38.0		-		-			-		114.1
		58.3		78.4		80.0		1,174.5		6.6		-			-		1,397.8
Intersegment revenues
Sales of commodities		273.0		151.9		0.9		110.5		-		(536.3	)		-		-
Fees from midstream services		0.9		-		36.6		6.4		-		(43.9	)		-		-
		273.9		151.9		37.5		116.9		-		(580.2	)		-		-
Revenues	$	332.2	$	230.3	$	117.5	$	1,291.4	$	6.6	$	(580.2	)	$	-	$	1,397.8
Operating margin	$	53.8	$	23.5	$	56.3	$	34.0	$	6.6	$	-		$	-	$	174.2
Other financial information:
Total assets	$	2,854.7	$	416.3	$	1,210.7	$	436.9	$	21.4	$	134.2		$	74.3	$	5,148.5
Capital expenditures	$	96.1	$	6.5	$	103.7	$	-	$	-	$	0.6		$	-	$	206.9

	Three Months Ended March 31, 2012
	Partnership
	Field Gathering and Processing		Coastal Gathering and Processing		Logistics Assets		Marketing and Distribution		Other		Corporate and Eliminations			TRC Non-Partnership		Consolidated
Revenues
Sales of commodities	$	45.4	$	59.8	$	45.7	$	1,417.2	$	1.4	$	-		$	0.3	$	1,569.8
Fees from midstream services		10.9		3.7		38.7		22.7		-		-			-		76.0
		56.3		63.5		84.4		1,439.9		1.4		-			0.3		1,645.8
Intersegment revenues
Sales of commodities		317.4		220.0		-		132.0		-		(669.4	)		-		-
Fees from midstream services		0.3		0.1		24.0		9.3		-		(33.7	)		-		-
		317.7		220.1		24.0		141.3		-		(703.1	)		-		-
Revenues	$	374.0	$	283.6	$	108.4	$	1,581.2	$	1.4	$	(703.1	)	$	0.3	$	1,645.8
Operating margin	$	73.0	$	46.3	$	43.0	$	26.1	$	1.4	$	-		$	0.2	$	190.0
Other financial information:
Total assets	$	1,661.1	$	422.5	$	823.0	$	507.9	$	49.5	$	123.1		$	111.3	$	3,698.4
Capital expenditures	$	26.2	$	2.0	$	60.1	$	9.1	$	-	$	0.6		$	0.3	$	98.3

Revenues by product and service

The following table shows our consolidated revenues by product and service for the periods presented:

	Three Months Ended March 31,
	2013		2012
Sales of commodities
Natural gas sales	$	255.3	$	202.9
NGL sales		963.5		1,290.2
Condensate sales		27.1		29.0
Petroleum products		31.3		45.5
Derivative activities		6.5		2.2
		1,283.7		1,569.8
Fees from midstream services
Fractionating and treating fees		29.7		26.9
Storage, terminaling, transportation and export fees		60.2		30.5
Gas gathering and processing fees		18.5		8.6
Other		5.7		10.0
		114.1		76.0
Total revenues	$	1,397.8	$	1,645.8

Reconciliation of operating margin to net income

The following table shows a reconciliation of operating margin to net income for the periods presented:

	Three Months Ended March 31,
	2013			2012
Reconciliation of operating margin to net income
Operating margin	$	174.2		$	190.0
Depreciation and amortization expense		(64.0	)		(47.4	)
General and administrative expense		(36.3	)		(34.9	)
Interest expense, net		(32.1	)		(30.5	)
Income tax expense		(9.4	)		(10.1	)
Other, net		1.4			2.1
Net income	$	33.8		$	69.2

- Definition

Tabular disclosure of all significant reconciling items in the reconciliation of total profit or loss from reportable segments, to the entity's consolidated income before income taxes, extraordinary items, and discontinued operations.

+ References + Details

- Definition

Tabular disclosure of entity-wide revenues from external customers for each product or service or each group of similar products or services if the information is not provided as part of the reportable operating segment information.

+ References + Details

- Definition

Tabular disclosure of the profit or loss and total assets for each reportable segment. An entity discloses certain information on each reportable segment if the amounts (a) are included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) are otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or loss.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 131
-Paragraph 27, 28
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6905597&loc=d3e13816-109267

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 25
-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8813-108599

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 21
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8721-108599

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 22
-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8736-108599

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 30
-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8906-108599

+ Details

Basis of Presentation (Details)	3 Months Ended
Basis of Presentation (Details)	Mar. 31, 2013 shares
Partnership Ownership Disclosure [Abstract]
General partner ownership interest (in hundredths)	2.00%
Parent's percentage ownership in the general partner of the Partnership (in hundredths)	100.00%
Number of Partnership common units owned (in units)	12,945,659
Limited Partner [Member]
Partnership Ownership Disclosure [Abstract]
General partner ownership interest (in hundredths)	12.60%

- Definition

The number of units or percentage investment held by the managing member or general partner of the LLC or LP.

+ References + Details

Business Acquisitions (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		12 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Dec. 31, 2012
As reported [Abstract]
Revenues	$ 1,397.8	$ 1,645.8	$ 5,885.7
Net income	33.8	69.2	159.3
Less: Net income attributable to noncontrolling interests	20.4	59.6	121.2
Net income attributable to Targa Resources Corp.	$ 13.4	$ 9.6	$ 38.1
Net income per common share - Basic (in dollars per share)	$ 0.32	$ 0.23	$ 0.93
Net income per common share - Diluted (in dollars per share)	$ 0.32	$ 0.23	$ 0.91
Pro Forma Results [Abstract]
Revenues		$ 1,648.7	$ 5,909.9
Net income		59.2	129.5
Less: Net income attributable to noncontrolling interests		47.3	83.5
Net income attributable to Targa Resources Corp.		$ 11.9	$ 46.0
Net income per common share - Basic		$ 0.29	$ 1.12
Net income per common share - Diluted		$ 0.28	$ 1.10
Useful life of acquired property, plant and equipment - minimum	15 years
Useful life of acquired property, plant and equipment - maximum	20 years
Useful life of acquired definite-lived intangibles	20 years
Useful life of acquired property, plant, and equipment - pro-forma as reported in 10-K	30 years
Useful life of acquired definite-lived intangibles - pro-forma as reported in 10-K	30 years
Badlands [Member]
Business Acquisition [Line Items]
Contingent consideration			$ 50.0
Fair value of contingent consideration	$ 15.6		$ 15.3
Increase in contingent consideration attributable to accretion of the discount factor	$ 0.3

Inventories (Details) - USD ($) $ in Millions	Mar. 31, 2013	Dec. 31, 2012
Inventories [Abstract]
Natural gas liquids	$ 44.2	$ 82.3
Materials and supplies	21.8	17.1
Inventories, Net	$ 66.0	$ 99.4

- Definition

Carrying amount (lower of cost or market) as of the balance sheet date of inventories less all valuation and other allowances. Excludes noncurrent inventory balances (expected to remain on hand past one year or one operating cycle, if longer).

+ References + Details

Property, Plant and Equipment and Intangible Assets (Details) $ in Millions	3 Months Ended
	Mar. 31, 2013 USD ($)	Dec. 31, 2012 USD ($)
Property, Plant and Equipment [Line Items]
Property, plant and equipment, at cost	$ 4,919.6	$ 4,708.0
Accumulated depreciation	(1,227.2)	(1,170.0)
Property, plant and equipment, net	3,692.4	3,538.0
Estimated amortization expense for intangible assets [Abstract]
2013	27.1
2014	61.4
2015	80.1
2016	88.3
2017	$ 81.5
Natural Gas Gathering Systems [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life, minimum (in years)	5
Estimated useful life, maximum (in years)	20
Processing and Fractionation Facilities [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life, minimum (in years)	5
Estimated useful life, maximum (in years)	25
Terminaling and Storage Facilities [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life, minimum (in years)	5
Estimated useful life, maximum (in years)	25
Transportation Assets [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life, minimum (in years)	10
Estimated useful life, maximum (in years)	25
Other Property, Plant and Equipment [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life, minimum (in years)	3
Estimated useful life, maximum (in years)	25
Targa Resources Partners LP [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, at cost	$ 4,912.8	4,701.2
Accumulated depreciation	(1,225.1)	(1,168.0)
Property, plant and equipment, net	3,687.7	3,533.2
Intangible assets	680.8	680.8
Accumulated amortization	(6.7)	0.0
Intangible assets, net	674.1	680.8
Targa Resources Partners LP [Member] \| Natural Gas Gathering Systems [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, at cost	2,048.0	1,975.3
Targa Resources Partners LP [Member] \| Processing and Fractionation Facilities [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, at cost	1,262.1	1,251.6
Targa Resources Partners LP [Member] \| Terminaling and Storage Facilities [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, at cost	502.6	462.0
Targa Resources Partners LP [Member] \| Transportation Assets [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, at cost	292.6	292.5
Targa Resources Partners LP [Member] \| Other Property, Plant and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, at cost	86.7	84.6
Targa Resources Partners LP [Member] \| Land [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, at cost	87.1	87.1
Targa Resources Partners LP [Member] \| Construction in Progress [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, at cost	633.7	548.1
Parent Company excluding Partnership [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, at cost	4,919.6	4,708.0
Accumulated depreciation	(1,227.2)	(1,170.0)
Property, plant and equipment, net	3,692.4	3,538.0
Intangible assets	680.8	680.8
Accumulated amortization	(6.7)	0.0
Intangible assets, net	674.1	680.8
Parent Company excluding Partnership [Member] \| Natural Gas Gathering Systems [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, at cost	2,048.0	1,975.3
Parent Company excluding Partnership [Member] \| Processing and Fractionation Facilities [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, at cost	1,268.7	1,258.2
Parent Company excluding Partnership [Member] \| Terminaling and Storage Facilities [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, at cost	502.6	462.0
Parent Company excluding Partnership [Member] \| Transportation Assets [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, at cost	292.6	292.5
Parent Company excluding Partnership [Member] \| Other Property, Plant and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, at cost	86.9	84.8
Parent Company excluding Partnership [Member] \| Land [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, at cost	87.1	87.1
Parent Company excluding Partnership [Member] \| Construction in Progress [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, at cost	633.7	548.1
TRC Non Partnership [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, at cost	6.8	6.8
Accumulated depreciation	(2.1)	(2.0)
Property, plant and equipment, net	4.7	4.8
Intangible assets	0.0	0.0
Accumulated amortization	0.0	0.0
Intangible assets, net	0.0	0.0
TRC Non Partnership [Member] \| Natural Gas Gathering Systems [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, at cost	0.0	0.0
TRC Non Partnership [Member] \| Processing and Fractionation Facilities [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, at cost	6.6	6.6
TRC Non Partnership [Member] \| Terminaling and Storage Facilities [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, at cost	0.0	0.0
TRC Non Partnership [Member] \| Transportation Assets [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, at cost	0.0	0.0
TRC Non Partnership [Member] \| Other Property, Plant and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, at cost	0.2	0.2
TRC Non Partnership [Member] \| Land [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, at cost	0.0	0.0
TRC Non Partnership [Member] \| Construction in Progress [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, at cost	$ 0.0	$ 0.0
Intangible Assets [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated useful lives (in years)	20

Accounts Payable and Accrued Liabilities (Details) - USD ($) $ in Millions	Mar. 31, 2013	Dec. 31, 2012
Accounts Payable and Accrued Liabilities [Abstract]
Commodities	$ 383.5	$ 416.8
Other goods and services	141.0	154.4
Interest	35.3	39.5
Compensation and benefits	30.4	40.7
Other	30.9	27.6
Accounts payable and accrued liabilities	$ 621.1	$ 679.0

- Definition

Sum of the carrying values as of the balance sheet date of obligations incurred through that date and due within one year (or the operating cycle, if longer), including liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received, taxes, interest, rent and utilities, accrued salaries and bonuses, payroll taxes and fringe benefits.

+ References + Details

- Definition

Carrying value as of the balance sheet date of obligations incurred and payable, which are not elsewhere specified in the taxonomy. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 19
-Subparagraph a
-Article 5

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Research Bulletin (ARB)
-Number 43
-Chapter 3
-Section A
-Paragraph 7
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.19(a))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Current Liabilities
-URI http://asc.fasb.org/extlink&oid=6509677

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section 45
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=6361293&loc=d3e6935-107765

+ Details

- Definition

Total of the carrying values as of the balance sheet date of obligations incurred through that date and payable for obligations related to services received from employees, such as accrued salaries and bonuses, payroll taxes and fringe benefits. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

+ References + Details

- Definition

Carrying value as of the balance sheet date of [accrued] interest payable on all forms of debt, including trade payables, that has been incurred and is unpaid. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Research Bulletin (ARB)
-Number 43
-Chapter 3
-Section A
-Paragraph 7
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 20
-Article 5

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Current Liabilities
-URI http://asc.fasb.org/extlink&oid=6509677

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section 45
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=6361293&loc=d3e6935-107765

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.20)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section 45
-Paragraph 9
-URI http://asc.fasb.org/extlink&oid=6361293&loc=d3e7018-107765

+ Details

- Definition

Carrying value as of the balance sheet date of obligations incurred through that date and payable arising from transactions not otherwise specified in the taxonomy. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Research Bulletin (ARB)
-Number 43
-Chapter 3
-Section A
-Paragraph 7
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 20
-Article 5

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Current Liabilities
-URI http://asc.fasb.org/extlink&oid=6509677

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section 45
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=6361293&loc=d3e6935-107765

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.20)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section 45
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=6361293&loc=d3e6911-107765

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section 45
-Paragraph 9
-URI http://asc.fasb.org/extlink&oid=6361293&loc=d3e7018-107765

+ Details

Debt Obligations (Details) - USD ($)
$ in Millions

3 Months Ended

Mar. 31, 2013

Dec. 31, 2012

Schedule of Debt Instruments [Line Items]

Long-term debt

$ 2,522.4

$ 2,475.3

Irrevocable Standby Letters of Credit [Member]

Schedule of Debt Instruments [Line Items]

Letters of credit outstanding

$ 53.2

45.3

Senior unsecured notes due 2017 [Member]

Range of interest rates and weighted average interest rate [Abstract]

Per Annum Interest Rate (in hundredths)

11.25%

Senior unsecured notes due 2018 [Member]

Range of interest rates and weighted average interest rate [Abstract]

Per Annum Interest Rate (in hundredths)

7.875%

Senior unsecured notes due 2021 [Member]

Range of interest rates and weighted average interest rate [Abstract]

Per Annum Interest Rate (in hundredths)

6.875%

Senior unsecured notes due 2022 [Member]

Range of interest rates and weighted average interest rate [Abstract]

Per Annum Interest Rate (in hundredths)

6.375%

Senior unsecured notes due 2023 [Member]

Range of interest rates and weighted average interest rate [Abstract]

Per Annum Interest Rate (in hundredths)

5.25%

TRC Senior secured credit facility [Member] | Secured Debt [Member] | Irrevocable Standby Letters of Credit [Member]

Schedule of Debt Instruments [Line Items]

Letters of credit outstanding

^[1]

$ 0.0

0.0

Partnership's Senior secured credit facility [Member] | Secured Debt [Member] | Irrevocable Standby Letters of Credit [Member]

Schedule of Debt Instruments [Line Items]

Letters of credit outstanding

^[2]

$ 53.2

45.3

Partnership's accounts receivable securitization facility [Member] | Accounts Receivable Securitization [Member]

Range of interest rates and weighted average interest rate [Abstract]

Range of Interest Rates Incurred, Maximum (in hundredths)

0.90%

Weighted Average Interest Rate Incurred (in hundredths)

0.90%

Parent Company excluding Partnership [Member] | TRC senior secured revolving credit facility due 2017 [Member]

Schedule of Debt Instruments [Line Items]

Long-term debt

^[1]

$ 72.0

82.0

Maturity date

Oct. 01, 2017

Parent Company excluding Partnership [Member] | TRP senior secured revolving credit facility due 2015 [Member]

Range of interest rates and weighted average interest rate [Abstract]

Range of Interest Rates Incurred, Minimum (in hundredths)

2.90%

Range of Interest Rates Incurred, Maximum (in hundredths)

3.00%

Weighted Average Interest Rate Incurred (in hundredths)

3.00%

Parent Company excluding Partnership [Member] | Senior unsecured notes due 2017 [Member] | Secured Debt [Member]

Range of interest rates and weighted average interest rate [Abstract]

Revolving credit facility

$ 78.0

Available capacity under revolving credit facility

150.0

Targa Resources Partners LP [Member] | Accounts receivable securitization facility [Member]

Schedule of Debt Instruments [Line Items]

Long-term debt

^[3],[4]

$ 111.4

0.0

Maturity date

Jan. 01, 2014

Targa Resources Partners LP [Member] | TRC senior secured revolving credit facility due 2017 [Member]

Schedule of Debt Instruments [Line Items]

Long-term debt

^[2],[4]

$ 565.0

620.0

Maturity date

Oct. 01, 2017

Targa Resources Partners LP [Member] | TRC senior secured revolving credit facility due 2017 [Member] | Secured Debt [Member]

Range of interest rates and weighted average interest rate [Abstract]

Revolving credit facility

$ 1,200.0

Available capacity under revolving credit facility

581.8

Targa Resources Partners LP [Member] | Senior unsecured notes due 2017 [Member]

Schedule of Debt Instruments [Line Items]

Long-term debt

^[4]

72.7

Unamortized discount

^[4]

$ (2.4)

(2.5)

Maturity date

Jul. 15, 2017

Targa Resources Partners LP [Member] | Senior unsecured notes due 2018 [Member]

Schedule of Debt Instruments [Line Items]

Long-term debt

^[4]

$ 250.0

250.0

Maturity date

Oct. 15, 2018

Targa Resources Partners LP [Member] | Senior unsecured notes due 2021 [Member]

Schedule of Debt Instruments [Line Items]

Long-term debt

^[4]

$ 483.6

483.6

Unamortized discount

^[4]

$ (29.9)

(30.5)

Maturity date

Feb. 01, 2021

Targa Resources Partners LP [Member] | Senior unsecured notes due 2022 [Member]

Schedule of Debt Instruments [Line Items]

Long-term debt

^[4]

$ 400.0

400.0

Maturity date

Aug. 01, 2022

Targa Resources Partners LP [Member] | Senior unsecured notes due 2023 [Member]

Schedule of Debt Instruments [Line Items]

Long-term debt

^[4]

$ 600.0

Maturity date

May 01, 2023

Targa Resources Partners LP [Member] | Senior unsecured notes due 2023 [Member] | Accounts Receivable Securitization [Member]

Range of interest rates and weighted average interest rate [Abstract]

Aggregated principal amount of the new note

$ 200.0

Targa Resources Partners LP [Member] | Partnership's Senior secured credit facility [Member]

Range of interest rates and weighted average interest rate [Abstract]

Range of Interest Rates Incurred, Minimum (in hundredths)

1.90%

Range of Interest Rates Incurred, Maximum (in hundredths)

4.50%

Weighted Average Interest Rate Incurred (in hundredths)

2.20%

[1]	As of March 31, 2013, $78.0 million of TRC's $150.0 million credit facility was available.
[2]	As of March 31, 2013, availability under the Partnership's $1.2 billion senior secured revolving credit facility was $581.8 million.
[3]	All amounts outstanding under the Partnership’s Securitization Facility are reflected as long-term debt in our balance sheet to the extent that the Partnership has the ability and intent to fund the Securitization Facility’s borrowing with availability under the Partnership’s long-term Senior Secured Credit Facility (the “TRP Revolver”).
[4]	While we consolidate the debt of the Partnership in our financial statements, we do not have the obligation to make interest payments or debt payments with respect to the debt of the Partnership.

Partnership Units and Related Matters (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
	Mar. 31, 2013	Dec. 31, 2012
Partnership Equity [Abstract]
General partner ownership interest (in hundredths)	2.00%
Aggregate amount of debt or equity securities allowed to be issued under the shelf agreement	$ 300.0
Number of days from end of each quarter by when cash is distributed to unitholders	45 days
Date paid or to be paid	May 15, 2013	Feb. 14, 2013
Distributions Paid Limited Partners Common	$ 71.7	$ 69.0
Distributions to General Partners (Incentive)	22.1	20.1
Distributions to General Partners (2%)	1.9	1.8
Total distributions to general and limited partners	95.7	90.9
Distributions to Targa Resources Corp.	$ 33.0	$ 30.7
Distributions per limited partner per unit (in dollars per unit)	$ 0.6975	$ 0.6800
2012 EDA [Member]
Partnership Equity [Abstract]
Number of common units sold (in shares)	2,420,046
Gross proceeds from sale of common units	$ 96.7
Dollar amount of Common Units able to sell from Equity Distribution Agreement	100.0
General partner contributed to maintain general partner ownership percentage	$ 2.0
General partner ownership interest (in hundredths)	2.00%
2013 EDA [Member]
Partnership Equity [Abstract]
Number of common units sold (in shares)	248,252
Gross proceeds from sale of common units	$ 10.7
Dollar amount of Common Units able to sell from Equity Distribution Agreement	200.0
General partner contributed to maintain general partner ownership percentage	$ 0.3
General partner ownership interest (in hundredths)	2.00%

Common Stock and Related Matters (Details) - USD ($)
$ / shares in Units, $ in Millions

3 Months Ended

Jun. 30, 2013

Mar. 31, 2013

Dec. 31, 2012

Mar. 31, 2012

Common Stock and Related Matters [Abstract]

Date paid or to be paid

May 16, 2013

Feb. 15, 2013

Total dividend declared

$ 21.0

$ 19.4

Amount of dividend paid

$ 20.6

19.0

$ 13.8

Accrued dividends

^[1]

$ 0.4

Dividend declared per share of common stock (in dollars per share)

$ 0.49500

$ 0.45750

[1]	Represents accrued dividends on the restricted shares that are payable upon vesting.

- Definition

The increase (decrease) during the reporting period in other expenses incurred but not yet paid.

+ References + Details

- Definition

The cash outflow from the distribution of an entity's earnings in the form of dividends to common shareholders.

+ References + Details

Earnings per Common Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		12 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Dec. 31, 2012
Earnings per Common Share [Abstract]
Net income	$ 33.8	$ 69.2	$ 159.3
Less: Net income attributable to noncontrolling interests	20.4	59.6	121.2
Net income attributable to Targa Resources Corp.	$ 13.4	$ 9.6	$ 38.1
Weighted average shares outstanding - basic (in shares)	41.6	41.0
Net income available per common share - basic (in dollars per share)	$ 0.32	$ 0.23	$ 0.93
Weighted average shares outstanding (in shares)	41.6	41.0
Dilutive effect of unvested stock awards (in shares)	0.4	0.8
Weighted average shares outstanding - diluted (in shares)	42.0	41.8
Net income available per common share - diluted (in dollars per share)	$ 0.32	$ 0.23	$ 0.91

- Definition

The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 128
-Paragraph 36, 37, 38
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Article 5
-Section 03
-Paragraph 20

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 04
-Article 7
-Paragraph 18

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 04
-Paragraph 21
-Article 9

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.21)
-URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6920599&loc=d3e1252-109256

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 55
-Paragraph 52
-URI http://asc.fasb.org/extlink&oid=6945512&loc=d3e4984-109258

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257

Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 225
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-04.23)
-URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882

Reference 10: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 225
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-04.19)
-URI http://asc.fasb.org/extlink&oid=6879464&loc=d3e573970-122913

Reference 11: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Emerging Issues Task Force (EITF)
-Number 07-4
-Paragraph 4
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

- Definition

The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Article 5
-Section 03
-Paragraph 20

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 04
-Article 7
-Paragraph 18

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 04
-Paragraph 21
-Article 9

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 128
-Paragraph 11, 12, 36
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.21)
-URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6920599&loc=d3e1252-109256

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Emerging Issues Task Force (EITF)
-Number 07-4
-Paragraph 4
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

- Definition

The consolidated profit or loss for the period including the portion attributable to the noncontrolling interest.

+ References + Details

- Definition

Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of share based payment arrangements using the treasury stock method.

+ References + Details

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Emerging Issues Task Force (EITF)
-Number 87-21
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Research Bulletin (ARB)
-Number 51
-Paragraph 38
-Subparagraph a
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 130
-Paragraph 10, 15
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 95
-Paragraph 28, 29, 30
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Article 5
-Section 03
-Paragraph 19

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 04
-Paragraph 20
-Article 9

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3602-108585

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Net Income
-URI http://asc.fasb.org/extlink&oid=6518256

Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Other Comprehensive Income
-URI http://asc.fasb.org/extlink&oid=6519514

Reference 10: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257

Reference 11: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.18)
-URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688

Reference 12: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 225
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-04.19)
-URI http://asc.fasb.org/extlink&oid=6879464&loc=d3e573970-122913

Reference 13: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=6920043&loc=d3e565-108580

Reference 14: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 225
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-04.22)
-URI http://asc.fasb.org/extlink&oid=6879464&loc=d3e573970-122913

Reference 15: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Research Bulletin (ARB)
-Number 51
-Paragraph 38
-Subparagraph d
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 16: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Research Bulletin (ARB)
-Number 51
-Paragraph A7
-Appendix A

+ Details

- Definition

The portion of net Income or Loss attributable to the noncontrolling interest (if any) deducted in order to derive the portion attributable to the parent.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Research Bulletin (ARB)
-Number 51
-Paragraph 38
-Subparagraph a
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Research Bulletin (ARB)
-Number 51
-Paragraph A1, A4, A5
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 55
-Paragraph 4K
-URI http://asc.fasb.org/extlink&oid=6922042&loc=SL4591552-111686

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 50
-Paragraph 1A
-URI http://asc.fasb.org/extlink&oid=6921930&loc=SL4573702-111684

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 55
-Paragraph 4J
-URI http://asc.fasb.org/extlink&oid=6922042&loc=SL4591551-111686

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Research Bulletin (ARB)
-Number 51
-Paragraph 38
-Subparagraph c(1)
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

- Definition

The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 128
-Paragraph 40
-Subparagraph a
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 128
-Paragraph 8
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 45
-Paragraph 16
-URI http://asc.fasb.org/extlink&oid=6920599&loc=d3e1505-109256

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Emerging Issues Task Force (EITF)
-Number 07-4
-Paragraph 4
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

- Definition

Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 128
-Paragraph 171
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 128
-Paragraph 40
-Subparagraph a
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 128
-Paragraph 8
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 45
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=6920599&loc=d3e1448-109256

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Weighted-Average Number of Common Shares Outstanding
-URI http://asc.fasb.org/extlink&oid=6528421

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Emerging Issues Task Force (EITF)
-Number 07-4
-Paragraph 4
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

Derivative Instruments and Hedging Activities (Details) $ in Millions	3 Months Ended
	Mar. 31, 2013 USD ($)	Mar. 31, 2012 USD ($)	Dec. 31, 2012 USD ($)
Derivative Line [Items]
Derivative financial instruments, fair value, net	$ 8.2
Cash flow commodity hedge deferred net gain to be reclassified within twelve months	10.8
Cash flow interest rate swaps deferred net loss to be reclassified within twelve months	5.7
Derivative Assets [Abstract]
Current assets	18.2		$ 29.3
Long-term assets	3.2		5.1
Derivative Liabilities [Abstract]
Current liabilities	8.2		7.4
Long-term liabilities	5.0		4.8
Total derivative assets	21.4		34.4
Total derivative liabilities	13.2		12.2
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in OCI - Effective Portion	(7.6)	$ 15.5
Gain (Loss) Reclassified from OCI into Income - Effective Portion	4.9	0.2
Asset Position [Member] \| Gross Presentation [Member]
Derivative Liabilities [Abstract]
Total current position	18.2		29.3
Total long-term position	3.2		5.1
Pro forma impact of reporting derivatives in the Consolidated Balance Sheet [Abstract]
Counterparties with offsetting position	19.5		28.2
Counterparties without offsetting position - assets	1.9		6.2
Counterparties without offsetting position - liabilities	0.0		0.0
Asset Position [Member] \| Pro-forma Net Presentation [Member]
Derivative Liabilities [Abstract]
Total current position	11.1		21.9
Total long-term position	2.3		2.3
Total derivative assets	13.4		24.2
Pro forma impact of reporting derivatives in the Consolidated Balance Sheet [Abstract]
Counterparties with offsetting position	11.5		18.0
Counterparties without offsetting position - assets	1.9		6.2
Counterparties without offsetting position - liabilities	0.0		0.0
Liability Position [Member] \| Gross Presentation [Member]
Derivative Liabilities [Abstract]
Total current position	8.2		7.4
Total long-term position	5.0		4.8
Pro forma impact of reporting derivatives in the Consolidated Balance Sheet [Abstract]
Counterparties with offsetting position	8.0		10.2
Counterparties without offsetting position - assets	0.0		0.0
Counterparties without offsetting position - liabilities	5.2		2.0
Liability Position [Member] \| Pro-forma Net Presentation [Member]
Derivative Liabilities [Abstract]
Total current position	1.1		0.0
Total long-term position	4.1		2.0
Total derivative liabilities	5.2		2.0
Pro forma impact of reporting derivatives in the Consolidated Balance Sheet [Abstract]
Counterparties with offsetting position	0.0		0.0
Counterparties without offsetting position - assets	0.0		0.0
Counterparties without offsetting position - liabilities	5.2		2.0
Current Position [Member] \| Asset Position [Member] \| Gross Presentation [Member]
Pro forma impact of reporting derivatives in the Consolidated Balance Sheet [Abstract]
Counterparties with offsetting position	16.3		23.8
Counterparties without offsetting position - assets	1.9		5.5
Counterparties without offsetting position - liabilities	0.0		0.0
Current Position [Member] \| Asset Position [Member] \| Pro-forma Net Presentation [Member]
Pro forma impact of reporting derivatives in the Consolidated Balance Sheet [Abstract]
Counterparties with offsetting position	9.2		16.4
Counterparties without offsetting position - assets	1.9		5.5
Counterparties without offsetting position - liabilities	0.0		0.0
Current Position [Member] \| Liability Position [Member] \| Gross Presentation [Member]
Pro forma impact of reporting derivatives in the Consolidated Balance Sheet [Abstract]
Counterparties with offsetting position	7.1		7.4
Counterparties without offsetting position - assets	0.0		0.0
Counterparties without offsetting position - liabilities	1.1		0.0
Current Position [Member] \| Liability Position [Member] \| Pro-forma Net Presentation [Member]
Pro forma impact of reporting derivatives in the Consolidated Balance Sheet [Abstract]
Counterparties with offsetting position	0.0		0.0
Counterparties without offsetting position - assets	0.0		0.0
Counterparties without offsetting position - liabilities	1.1		0.0
Long-term Position [Member] \| Asset Position [Member] \| Gross Presentation [Member]
Pro forma impact of reporting derivatives in the Consolidated Balance Sheet [Abstract]
Counterparties with offsetting position	3.2		4.4
Counterparties without offsetting position - assets	0.0		0.7
Counterparties without offsetting position - liabilities	0.0		0.0
Long-term Position [Member] \| Asset Position [Member] \| Pro-forma Net Presentation [Member]
Pro forma impact of reporting derivatives in the Consolidated Balance Sheet [Abstract]
Counterparties with offsetting position	2.3		1.6
Counterparties without offsetting position - assets	0.0		0.7
Counterparties without offsetting position - liabilities	0.0		0.0
Long-term Position [Member] \| Liability Position [Member] \| Gross Presentation [Member]
Pro forma impact of reporting derivatives in the Consolidated Balance Sheet [Abstract]
Counterparties with offsetting position	0.9		2.8
Counterparties without offsetting position - assets	0.0		0.0
Counterparties without offsetting position - liabilities	4.1		2.0
Long-term Position [Member] \| Liability Position [Member] \| Pro-forma Net Presentation [Member]
Pro forma impact of reporting derivatives in the Consolidated Balance Sheet [Abstract]
Counterparties with offsetting position	0.0		0.0
Counterparties without offsetting position - assets	0.0		0.0
Counterparties without offsetting position - liabilities	4.1		2.0
Revenue [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Reclassified from OCI into Income - Effective Portion	6.6	2.5
Interest Expense, Net [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Reclassified from OCI into Income - Effective Portion	(1.7)	(2.3)
Commodity Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in OCI - Effective Portion	(7.6)	$ 15.5
Unrealized gain (loss) on hedges, before tax	1.1		3.2
Unrealized gain (loss) on hedges, after tax	0.6		1.9
Interest Rate Swap [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Unrealized gain (loss) on hedges, before tax	(1.0)		(1.2)
Unrealized gain (loss) on hedges, after tax	$ (0.6)		(0.7)
Interest Rate Swap [Member] \| Year 2013 [Member] \| Units - MMBtu/day [Member] \| Natural Gas [Member]
Derivative Line [Items]
Notional volumes of commodity hedges	31,108
Interest Rate Swap [Member] \| Year 2013 [Member] \| Unit - Bbl/D [Member] \| NGL [Member]
Derivative Line [Items]
Notional volumes of commodity hedges	5,650
Interest Rate Swap [Member] \| Year 2013 [Member] \| Unit - Bbl/D [Member] \| Condensate [Member]
Derivative Line [Items]
Notional volumes of commodity hedges	1,962
Interest Rate Swap [Member] \| Year 2014 [Member] \| Units - MMBtu/day [Member] \| Natural Gas [Member]
Derivative Line [Items]
Notional volumes of commodity hedges	25,500
Interest Rate Swap [Member] \| Year 2014 [Member] \| Unit - Bbl/D [Member] \| NGL [Member]
Derivative Line [Items]
Notional volumes of commodity hedges	1,000
Interest Rate Swap [Member] \| Year 2014 [Member] \| Unit - Bbl/D [Member] \| Condensate [Member]
Derivative Line [Items]
Notional volumes of commodity hedges	1,450
Interest Rate Swap [Member] \| Year 2015 [Member] \| Units - MMBtu/day [Member] \| Natural Gas [Member]
Derivative Line [Items]
Notional volumes of commodity hedges	12,001
Interest Rate Swap [Member] \| Year 2015 [Member] \| Unit - Bbl/D [Member] \| NGL [Member]
Derivative Line [Items]
Notional volumes of commodity hedges	0
Interest Rate Swap [Member] \| Year 2015 [Member] \| Unit - Bbl/D [Member] \| Condensate [Member]
Derivative Line [Items]
Notional volumes of commodity hedges	0
Interest Rate Swap [Member] \| Year 2016 [Member] \| Units - MMBtu/day [Member] \| Natural Gas [Member]
Derivative Line [Items]
Notional volumes of commodity hedges	5,000
Interest Rate Swap [Member] \| Year 2016 [Member] \| Unit - Bbl/D [Member] \| NGL [Member]
Derivative Line [Items]
Notional volumes of commodity hedges	0
Interest Rate Swap [Member] \| Year 2016 [Member] \| Unit - Bbl/D [Member] \| Condensate [Member]
Derivative Line [Items]
Notional volumes of commodity hedges	0
Designated as Hedging Instrument [Member]
Derivative Liabilities [Abstract]
Total derivative assets	$ 21.3		34.3
Total derivative liabilities	13.1		12.0
Designated as Hedging Instrument [Member] \| Commodity Contracts [Member]
Derivative Assets [Abstract]
Current assets	18.1		29.2
Long-term assets	3.2		5.1
Derivative Liabilities [Abstract]
Current liabilities	8.1		7.2
Long-term liabilities	5.0		4.8
Not Designated as Hedging Instrument [Member]
Derivative Liabilities [Abstract]
Total derivative assets	0.1		0.1
Total derivative liabilities	0.1		0.2
Not Designated as Hedging Instrument [Member] \| Commodity Contracts [Member]
Derivative Assets [Abstract]
Current assets	0.1		0.1
Derivative Liabilities [Abstract]
Current liabilities	$ 0.1		$ 0.2

Fair Value Measurements (Details) - USD ($) $ in Millions	3 Months Ended
Fair Value Measurements (Details) - USD ($) $ in Millions	Mar. 31, 2013	Dec. 31, 2012
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Assets from commodity derivative contracts	$ 21.4	$ 34.3
Liability from commodity derivative contracts	13.2	12.1
Badlands contingent consideration liability (see Note 4)	15.6	15.3
Cash and cash equivalents	112.7	76.3
TRC Senior secured revolving credit facility	72.0	82.0
Partnership's Senior secured revolving credit facility	565.0	620.0
Partnership's Senior unsecured notes	1,949.8	1,945.2
Partnership's accounts receivable securitization facility	111.4
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative financial instruments, fair value, net	8.2
Derivative fair value commodity price increases 10 percent, net asset	18.7
Derivative fair value commodity price decreases 10 percent, net asset	35.1
Fair Value, Inputs, Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Assets from commodity derivative contracts	0.0	0.0
Liability from commodity derivative contracts	0.0	0.0
Badlands contingent consideration liability (see Note 4)	0.0	0.0
TRC Senior secured revolving credit facility	0.0	0.0
Partnership's Senior secured revolving credit facility	0.0	0.0
Partnership's Senior unsecured notes	0.0	0.0
Partnership's accounts receivable securitization facility	0.0
Fair Value, Inputs, Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Assets from commodity derivative contracts	21.4	34.3
Liability from commodity derivative contracts	12.2	11.5
Badlands contingent consideration liability (see Note 4)	0.0	0.0
TRC Senior secured revolving credit facility	72.0	82.0
Partnership's Senior secured revolving credit facility	565.0	620.0
Partnership's Senior unsecured notes	1,949.8	1,945.2
Partnership's accounts receivable securitization facility	111.4
Fair Value, Inputs, Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Assets from commodity derivative contracts	0.0	0.0
Liability from commodity derivative contracts	1.0	0.6
Badlands contingent consideration liability (see Note 4)	15.6	15.3
TRC Senior secured revolving credit facility	0.0	0.0
Partnership's Senior secured revolving credit facility	0.0	0.0
Partnership's Senior unsecured notes	0.0	0.0
Partnership's accounts receivable securitization facility	0.0
Commodity Derivative Contracts [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at beginning of period	0.6
Loss included in Revenue	0.4
Loss included in Other expense	0.0
Balance at end of period	1.0
Contingent Liability[Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at beginning of period	15.3
Loss included in Revenue	0.0
Loss included in Other expense	0.3
Balance at end of period	15.6
Carrying (Reported) Amount, Fair Value Disclosure [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Assets from commodity derivative contracts	21.4	34.3
Liability from commodity derivative contracts	13.2	12.1
Badlands contingent consideration liability (see Note 4)	15.6	15.3
Cash and cash equivalents	112.7	76.3
TRC Senior secured revolving credit facility	72.0	82.0
Partnership's Senior secured revolving credit facility	565.0	620.0
Partnership's Senior unsecured notes	1,774.0	$ 1,773.3
Partnership's accounts receivable securitization facility	$ 111.4

Segment Information (Details) $ in Millions	3 Months Ended		12 Months Ended
Segment Information (Details) $ in Millions	Mar. 31, 2013 USD ($)	Mar. 31, 2012 USD ($)	Dec. 31, 2012 USD ($)
Segment Information [Abstract]
Number of reportable segments	4
Segment Reporting Information [Line Items]
Revenues	$ 1,397.8	$ 1,645.8	$ 5,885.7
Operating Margin	174.2	190.0
Total assets	5,148.5	3,698.4	5,105.0
Capital Expenditures	206.9	98.3
Depreciation and amortization expenses	(64.0)	(47.4)
General and administrative expenses	(36.3)	(34.9)
Interest expense, net	(32.1)	(30.5)
Income tax expense	(9.4)	(10.1)
Other, net	1.4	2.1
Net income	33.8	69.2	$ 159.3
Field Gathering and Processing [Member]
Segment Reporting Information [Line Items]
Revenues	332.2	374.0
Operating Margin	53.8	73.0
Total assets	2,854.7	1,661.1
Capital Expenditures	96.1	26.2
Coastal Gathering and Processing [Member]
Segment Reporting Information [Line Items]
Revenues	230.3	283.6
Operating Margin	23.5	46.3
Total assets	416.3	422.5
Capital Expenditures	6.5	2.0
Logistics Assets [Member]
Segment Reporting Information [Line Items]
Revenues	117.5	108.4
Operating Margin	56.3	43.0
Total assets	1,210.7	823.0
Capital Expenditures	103.7	60.1
Marketing and Distribution [Member]
Segment Reporting Information [Line Items]
Revenues	1,291.4	1,581.2
Operating Margin	34.0	26.1
Total assets	436.9	507.9
Capital Expenditures	0.0	9.1
Other Segment [Member]
Segment Reporting Information [Line Items]
Revenues	6.6	1.4
Operating Margin	6.6	1.4
Total assets	21.4	49.5
Capital Expenditures	0.0	0.0
Corporate and Eliminations [Member]
Segment Reporting Information [Line Items]
Revenues	(580.2)	(703.1)
Operating Margin	0.0	0.0
Total assets	134.2	123.1
Capital Expenditures	0.6	0.6
TRC Non- Partnership [Member]
Segment Reporting Information [Line Items]
Revenues	0.0	0.3
Operating Margin	0.0	0.2
Total assets	74.3	111.3
Capital Expenditures	0.0	0.3
Natural gas sales [Member]
Segment Reporting Information [Line Items]
Sale of commodities	255.3	202.9
NGL sales [Member]
Segment Reporting Information [Line Items]
Sale of commodities	963.5	1,290.2
Condensate sales [Member]
Segment Reporting Information [Line Items]
Sale of commodities	27.1	29.0
Petroleum Products [Member]
Segment Reporting Information [Line Items]
Sale of commodities	31.3	45.5
Derivative activities [Member]
Segment Reporting Information [Line Items]
Sale of commodities	6.5	2.2
Fractionating and treating fees [Member]
Segment Reporting Information [Line Items]
Fees from midstream services	29.7	26.9
Storage And Terminaling Fees [Member]
Segment Reporting Information [Line Items]
Fees from midstream services	60.2	30.5
Gas gathering and processing fees [Member]
Segment Reporting Information [Line Items]
Fees from midstream services	18.5	8.6
Total Other Revenues [Member]
Segment Reporting Information [Line Items]
Fees from midstream services	5.7	10.0
Total outside Revenues [Member]
Segment Reporting Information [Line Items]
Sale of commodities	1,283.7	1,569.8
Fees from midstream services	114.1	76.0
Revenues	1,397.8	1,645.8
Total outside Revenues [Member] \| Field Gathering and Processing [Member]
Segment Reporting Information [Line Items]
Sale of commodities	38.1	45.4
Fees from midstream services	20.2	10.9
Revenues	58.3	56.3
Total outside Revenues [Member] \| Coastal Gathering and Processing [Member]
Segment Reporting Information [Line Items]
Sale of commodities	69.6	59.8
Fees from midstream services	8.8	3.7
Revenues	78.4	63.5
Total outside Revenues [Member] \| Logistics Assets [Member]
Segment Reporting Information [Line Items]
Sale of commodities	32.9	45.7
Fees from midstream services	47.1	38.7
Revenues	80.0	84.4
Total outside Revenues [Member] \| Marketing and Distribution [Member]
Segment Reporting Information [Line Items]
Sale of commodities	1,136.5	1,417.2
Fees from midstream services	38.0	22.7
Revenues	1,174.5	1,439.9
Total outside Revenues [Member] \| Other Segment [Member]
Segment Reporting Information [Line Items]
Sale of commodities	6.6	1.4
Fees from midstream services	0.0	0.0
Revenues	6.6	1.4
Total outside Revenues [Member] \| Corporate and Eliminations [Member]
Segment Reporting Information [Line Items]
Sale of commodities	0.0	0.0
Fees from midstream services	0.0	0.0
Revenues	0.0	0.0
Total outside Revenues [Member] \| TRC Non- Partnership [Member]
Segment Reporting Information [Line Items]
Sale of commodities	0.0	0.3
Fees from midstream services	0.0	0.0
Revenues	0.0	0.3
Total Intersegment Revenues [Member]
Segment Reporting Information [Line Items]
Sale of commodities	0.0	0.0
Fees from midstream services	0.0	0.0
Revenues	0.0	0.0
Total Intersegment Revenues [Member] \| Field Gathering and Processing [Member]
Segment Reporting Information [Line Items]
Sale of commodities	273.0	317.4
Fees from midstream services	0.9	0.3
Revenues	273.9	317.7
Total Intersegment Revenues [Member] \| Coastal Gathering and Processing [Member]
Segment Reporting Information [Line Items]
Sale of commodities	151.9	220.0
Fees from midstream services	0.0	0.1
Revenues	151.9	220.1
Total Intersegment Revenues [Member] \| Logistics Assets [Member]
Segment Reporting Information [Line Items]
Sale of commodities	0.9	0.0
Fees from midstream services	36.6	24.0
Revenues	37.5	24.0
Total Intersegment Revenues [Member] \| Marketing and Distribution [Member]
Segment Reporting Information [Line Items]
Sale of commodities	110.5	132.0
Fees from midstream services	6.4	9.3
Revenues	116.9	141.3
Total Intersegment Revenues [Member] \| Other Segment [Member]
Segment Reporting Information [Line Items]
Sale of commodities	0.0	0.0
Fees from midstream services	0.0	0.0
Revenues	0.0	0.0
Total Intersegment Revenues [Member] \| Corporate and Eliminations [Member]
Segment Reporting Information [Line Items]
Sale of commodities	(536.3)	(669.4)
Fees from midstream services	(43.9)	(33.7)
Revenues	(580.2)	(703.1)
Total Intersegment Revenues [Member] \| TRC Non- Partnership [Member]
Segment Reporting Information [Line Items]
Sale of commodities	0.0	0.0
Fees from midstream services	0.0	0.0
Revenues	$ 0.0	$ 0.0