Targa Resources Partners (NGLS-PA) 10-Q 6 Aug 20 2020 Q2 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	6 Months Ended
	Jun. 30, 2020	Jul. 31, 2020
Cover [Abstract]
Entity Registrant Name	TARGA RESOURCES PARTNERS LP
Trading Symbol	NGLS
Entity Central Index Key	0001379661
Current Fiscal Year End Date	--12-31
Entity Filer Category	Non-accelerated Filer
Entity Preferred Units Outstanding		5,000,000
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	Q2
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jun. 30, 2020
Entity Small Business	false
Entity Shell Company	false
Entity Emerging Growth Company	false
Entity Current Reporting Status	Yes
Entity Tax Identification Number	65-1295427
Entity File Number	001-33303
Entity Address, Address Line One	811 Louisiana St
Entity Address, Address Line Two	Suite 2100
Entity Address, City or Town	Houston
Entity Address, State or Province	TX
Entity Address, Postal Zip Code	77002
City Area Code	713
Local Phone Number	584-1000
Entity Interactive Data Current	Yes
Title of 12(b) Security	9.0% Series A Fixed-to-Floating Rate Cumulative Redeemable Perpetual Preferred Units
Security Exchange Name	NYSE
Entity Incorporation, State or Country Code	DE
Document Quarterly Report	true
Document Transition Report	false

CONSOLIDATED BALANCE SHEETS (Un

CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Millions	Jun. 30, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 173.6	$ 291.1
Trade receivables, net of allowances of $0.1 and $0.0 million at June 30, 2020 and December 31, 2019	547.3	855.2
Inventories	219.3	161.5
Assets from risk management activities	122	103.3
Deposits	95.2	35.4
Held for sale assets		137.7
Other current assets	31.5	18.8
Total current assets	1,188.9	1,603
Property, plant and equipment, net	12,417.5	14,549
Intangible assets, net	1,452.8	1,735
Long-term assets from risk management activities	43.3	35.5
Investments in unconsolidated affiliates	724.3	738.7
Other long-term assets	89.5	83.3
Total assets	15,916.3	18,744.5
Current liabilities:
Accounts payable	608.7	977.8
Accrued liabilities	75	88.7
Interest payable	144.3	125.4
Distributions payable to noncontrolling interests	89.9	91.8
Accounts payable to Targa Resources Corp.	190.4	193.8
Liabilities from risk management activities	80.5	104.1
Current debt obligations	261.9	382.2
Held for sale liabilities		6.4
Total current liabilities	1,450.7	1,970.2
Long-term debt	7,144.6	7,005.2
Long-term liabilities from risk management activities	52.9	40.8
Deferred income taxes, net	23	23
Other long-term liabilities	266.2	260
Contingencies (see Note 11)
Owners' equity:
Series A preferred limited partners (5,000,000 and 5,000,000 units issued and 5,000,000 and 5,000,000 outstanding as of June 30, 2020 and December 31, 2019)	120.6	120.6
Common limited partners (275,168,410 and 275,168,410 units issued and 275,168,410 and 275,168,410 outstanding as of June 30, 2020 and December 31, 2019)	2,865.2	5,022.7
General partner (5,629,136 and 5,629,136 units issued and 5,629,136 and 5,629,136 outstanding as of June 30, 2020 and December 31, 2019)	733.8	778
Accumulated other comprehensive income (loss)	28.4	122.5
Partners' Capital	3,748	6,043.8
Noncontrolling interests	3,230.9	3,401.5
Total owners' equity	6,978.9	9,445.3
Total liabilities and owners' equity	$ 15,916.3	$ 18,744.5

CONSOLIDATED BALANCE SHEETS (_2

CONSOLIDATED BALANCE SHEETS (Unaudited) (Parenthetical) - USD ($) $ in Millions	Jun. 30, 2020	Dec. 31, 2019
Current assets:
Trade receivables, allowances	$ 0.1	$ 0
Owners' equity:
Common limited partners units issued (in units)	275,168,410	275,168,410
Common limited partners units outstanding (in units)	275,168,410	275,168,410
General partner units issued (in units)	5,629,136	5,629,136
General partner units outstanding (in units)	5,629,136	5,629,136
Series A Preferred Limited Partner Units [Member]
Owners' equity:
Series A preferred limited partners units issued (in units)	5,000,000	5,000,000
Series A preferred limited partners units outstanding (in units)	5,000,000	5,000,000

CONSOLIDATED STATEMENTS OF OPER

CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Revenues:
Total revenues	$ 1,523.5	$ 1,995.3	$ 3,572.4	$ 4,294.7
Costs and expenses:
Product purchases	860.6	1,361.6	2,043.6	3,087.6
Operating expenses	183.4	210.2	383.3	400.5
Depreciation and amortization expense	204.5	237.2	443.6	474.6
General and administrative expense	58.6	69.3	115.5	146.7
Impairment of long-lived assets	0	0	2,442.8	0
Other operating (income) expense	0.4	(0.2)	1.6	3.3
Income (loss) from operations	216	117.2	(1,858)	182
Other income (expense):
Interest expense, net	(94.3)	(69.5)	(188.1)	(144.9)
Equity earnings (loss)	14.9	3.2	35.5	5.9
Gain (loss) from financing activities	21.8	0	61.1	(1.4)
Change in contingent considerations	0	0.8	0	(8.9)
Other, net	0.8	0	0.8	0
Income (loss) before income taxes	159.2	51.7	(1,948.7)	32.7
Income tax (expense) benefit	0	0	0	0
Net income (loss)	159.2	51.7	(1,948.7)	32.7
Less: Net income (loss) attributable to noncontrolling interests	93.3	56.3	8	67.7
Net income (loss) attributable to Targa Resources Partners LP	65.9	(4.6)	(1,956.7)	(35)
Net income attributable to preferred limited partners	2.8	2.8	5.6	5.6
Net income (loss) attributable to general partner	1.2	(0.1)	(39.4)	(0.8)
Net income (loss) attributable to common limited partners	61.9	(7.3)	(1,922.9)	(39.8)
Sales of Commodities [Member]
Revenues:
Total revenues	1,280.6	1,684.2	3,060.2	3,660.7
Fees from Midstream Services [Member]
Revenues:
Total revenues	$ 242.9	$ 311.1	$ 512.2	$ 634

CONSOLIDATED STATEMENTS OF COMP

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (Unaudited) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Net income (loss)	$ 159.2	$ 51.7	$ (1,948.7)	$ 32.7
Other comprehensive income (loss):
Other comprehensive income (loss)	(193.1)	45.1	(94.1)	(15)
Comprehensive income (loss)	(33.9)	96.8	(2,042.8)	17.7
Less: Comprehensive income (loss) attributable to noncontrolling interests	93.3	56.3	8	67.7
Comprehensive income (loss) attributable to Targa Resources Partners LP	(127.2)	40.5	(2,050.8)	(50)
Commodity Contracts [Member]
Other comprehensive income (loss):
Change in fair value	(132.9)	88.4	26.2	49.6
Settlements reclassified to revenues	$ (60.2)	$ (43.3)	$ (120.3)	$ (64.6)

CONSOLIDATED STATEMENTS OF CHAN

CONSOLIDATED STATEMENTS OF CHANGES IN OWNERS' EQUITY - USD ($) shares in Thousands, $ in Millions	Total	Limited Partner Preferred [Member]	Limited Partners Common [Member]	General Partner Units [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Non-controlling Interests [Member]
Balance at Dec. 31, 2018	$ 8,546.1	$ 120.6	$ 6,227.2	$ 802.6	$ 124.9	$ 1,270.8
Balance (in units) at Dec. 31, 2018		5,000	275,168	5,629
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Contributions from Targa Resources Corp.	190	$ 0	$ 186.2	$ 3.8	0	0
Contributions from Targa Resources Corp. (in units)		0	0	0
Sale of ownership interests in subsidiaries	1,609	$ 0	$ (10.5)	$ (0.2)	0	1,619.7
Distributions to noncontrolling interests	(85.5)	0	0	0	0	(85.5)
Contributions from noncontrolling interests	403.5	0	0	0	0	403.5
Other comprehensive income (loss)	(15)	0	0	0	(15)	0
Net income (loss)	32.7	5.6	(39.8)	(0.8)	0	67.7
Distributions	(679.1)	(5.6)	(660)	(13.5)	0	0
Balance at Jun. 30, 2019	10,001.7	$ 120.6	$ 5,703.1	$ 791.9	109.9	3,276.2
Balance (in units) at Jun. 30, 2019		5,000	275,168	5,629
Balance at Mar. 31, 2019	8,403.9	$ 120.6	$ 5,961	$ 797.1	64.8	1,460.4
Balance (in units) at Mar. 31, 2019		5,000	275,168	5,629
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Contributions from Targa Resources Corp.	190	$ 0	$ 186.2	$ 3.8	0	0
Contributions from Targa Resources Corp. (in units)		0	0	0
Sale of ownership interests in subsidiaries	1,609	$ 0	$ (10.5)	$ (0.2)	0	1,619.7
Distributions to noncontrolling interests	(66.9)	0	0	0	0	(66.9)
Contributions from noncontrolling interests	206.7	0	0	0	0	206.7
Other comprehensive income (loss)	45.1	0	0	0	45.1	0
Net income (loss)	51.7	2.8	(7.3)	(0.1)	0	56.3
Distributions	(437.8)	(2.8)	(426.3)	(8.7)	0	0
Balance at Jun. 30, 2019	10,001.7	$ 120.6	$ 5,703.1	$ 791.9	109.9	3,276.2
Balance (in units) at Jun. 30, 2019		5,000	275,168	5,629
Balance at Dec. 31, 2019	9,445.3	$ 120.6	$ 5,022.7	$ 778	122.5	3,401.5
Balance (in units) at Dec. 31, 2019		5,000	275,168	5,629
Balance at Mar. 31, 2020	7,103.9	$ 120.6	$ 2,803.6	$ 732.6	221.5	3,225.6
Balance (in units) at Mar. 31, 2020		5,000	275,168	5,629
Balance at Dec. 31, 2019	9,445.3	$ 120.6	$ 5,022.7	$ 778	122.5	3,401.5
Balance (in units) at Dec. 31, 2019		5,000	275,168	5,629
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Contributions from Targa Resources Corp.	50	$ 0	$ 49	$ 1	0	0
Contributions from Targa Resources Corp. (in units)		0	0	0
Distributions to noncontrolling interests	(204.3)	$ 0	$ 0	$ 0	0	(204.3)
Contributions from noncontrolling interests	25.7	0	0	0	0	25.7
Other comprehensive income (loss)	(94.1)	0	0	0	(94.1)	0
Net income (loss)	(1,948.7)	5.6	(1,922.9)	(39.4)	0	8
Distributions	(295)	(5.6)	(283.6)	(5.8)	0	0
Balance at Jun. 30, 2020	6,978.9	$ 120.6	$ 2,865.2	$ 733.8	28.4	3,230.9
Balance (in units) at Jun. 30, 2020		5,000	275,168	5,629
Balance at Mar. 31, 2020	7,103.9	$ 120.6	$ 2,803.6	$ 732.6	221.5	3,225.6
Balance (in units) at Mar. 31, 2020		5,000	275,168	5,629
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Contributions from Targa Resources Corp.	50	$ 0	$ 49	$ 1	0	0
Contributions from Targa Resources Corp. (in units)		0	0	0
Distributions to noncontrolling interests	(103.1)	$ 0	$ 0	$ 0	0	(103.1)
Contributions from noncontrolling interests	15.1	0	0	0	0	15.1
Other comprehensive income (loss)	(193.1)	0	0	0	(193.1)	0
Net income (loss)	159.2	2.8	61.9	1.2	0	93.3
Distributions	(53.1)	(2.8)	(49.3)	(1)	0	0
Balance at Jun. 30, 2020	$ 6,978.9	$ 120.6	$ 2,865.2	$ 733.8	$ 28.4	$ 3,230.9
Balance (in units) at Jun. 30, 2020		5,000	275,168	5,629

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Cash flows from operating activities
Net income (loss)	$ (1,948.7)	$ 32.7
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Amortization in interest expense	5	4.6
Depreciation and amortization expense	443.6	474.6
Impairment of long-lived assets	2,442.8	0
Accretion of asset retirement obligations	1.7	2.3
Equity (earnings) loss of unconsolidated affiliates	(35.5)	(5.9)
Distributions of earnings received from unconsolidated affiliates	44.5	14.4
Risk management activities	(125.9)	0.1
(Gain) loss on sale or disposition of assets	0	3.1
(Gain) loss from financing activities	(61.1)	1.4
Change in contingent considerations	0	8.9
Changes in operating assets and liabilities, net of business acquisitions:
Receivables and other assets	240.1	198.2
Inventories	(56.7)	(76.7)
Accounts payable, accrued liabilities and other liabilities	(262.1)	(154.1)
Interest payable	18.9	41.4
Net cash provided by operating activities	706.6	545
Cash flows from investing activities
Outlays for property, plant and equipment	(615.9)	(1,750.5)
Proceeds from sale of business and assets	134.8	2.4
Investments in unconsolidated affiliates	(1.4)	(194.8)
Return of capital from unconsolidated affiliates	6.9	0.1
Other, net	3.5	(19.1)
Net cash used in investing activities	(472.1)	(1,961.9)
Debt obligations:
Proceeds from borrowings under credit facility	1,240	1,320
Repayments of credit facility	(800)	(1,830)
Proceeds from borrowings under accounts receivable securitization facility	226.4	742.9
Repayments of accounts receivable securitization facility	(346.4)	(724.6)
Proceeds from issuance of senior notes	0	1,500
Redemption of senior notes	(239.8)	(749.4)
Principal payments of finance leases	(6.2)	(5.5)
Costs incurred in connection with financing arrangements	(0.5)	(25.1)
Payment of contingent consideration	0	(317.1)
Sale of ownership interests in subsidiaries	0	1,619.7
Contributions from general partner	1	3.8
Contributions from TRC	49	186.2
Contributions from noncontrolling interests	25.7	403.5
Distributions to noncontrolling interests	(206.2)	(35.9)
Distributions to unitholders	(295)	(679.1)
Net cash provided by (used in) financing activities	(352)	1,409.4
Net change in cash and cash equivalents	(117.5)	(7.5)
Cash and cash equivalents, beginning of period	291.1	203.3
Cash and cash equivalents, end of period	$ 173.6	$ 195.8

Organization and Operations

Organization and Operations	6 Months Ended
	Jun. 30, 2020
Limited Liability Company Or Limited Partnership Business Organization And Operations [Abstract]
Organization and Operations	Note 1 — Organization and Operations Our Organization Targa Resources Partners LP is a Delaware limited partnership formed in October 2006 by our parent, Targa Resources Corp. (“Targa” or “TRC” or the “Company” or “Parent”). In this Quarterly Report, unless the context requires otherwise, references to “we,” “us,” “our,” “TRP,” or the “Partnership” are intended to mean the business and operations of Targa Resources Partners LP and its consolidated subsidiaries. Our common units are wholly owned by TRC and no longer publicly traded as a result of TRC’s acquisition of our outstanding common units that it and its subsidiaries did not already own in 2016. The 5,000,000 9.00% Series A Fixed-to-Floating Rate Cumulative Redeemable Perpetual Preferred Units (the “Preferred Units”) that were issued in October 2015 remain outstanding as limited partner interests in us and continue to trade on the NYSE under the symbol “NGLS/PA.” Our Operations We are primarily engaged in the business of: • gathering, compressing, treating, processing, transporting and selling natural gas; • transporting, storing, fractionating, treating and selling NGLs and NGL products, including services to LPG exporters; and • gathering, storing, terminaling and selling crude oil. See Note 14 – Segment Information for certain financial information regarding our business segments. The employees supporting our operations are employed by Targa. Our consolidated financial statements include the direct costs of Targa employees deployed to our operating segments, as well as an allocation of costs associated with our usage of Targa’s centralized general and administrative services.

Basis of Presentation

Basis of Presentation	6 Months Ended
	Jun. 30, 2020
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Basis of Presentation	Note 2 — Basis of Presentation The accompanying unaudited consolidated financial statements have been prepared in accordance with the instructions to Form 10-Q and do not include all information and disclosures required by GAAP. Therefore, this information should be read in conjunction with our consolidated financial statements and notes contained in our Annual Report. The information furnished herein reflects all adjustments that are, in the opinion of management, necessary for a fair statement of the results of the interim periods reported. All significant intercompany balances and transactions have been eliminated in consolidation. Certain amounts in prior periods have been reclassified to conform to the current year presentation. Operating results for the three and six months ended June 30, 2020 are not necessarily indicative of the results that may be expected for the year ending December 31, 2020 .

Significant Accounting Policies

Significant Accounting Policies	6 Months Ended
	Jun. 30, 2020
Accounting Policies [Abstract]
Significant Accounting Policies	Note 3 — Significant Accounting Policies The accounting policies that we follow are set forth in Note 3 – Significant Accounting Policies of the Notes to Consolidated Financial Statements in our Annual Report. Other than the updates noted below, there were no significant updates or revisions to our accounting policies during the six months ended June 30, 2020. Recent Accounting Pronouncements Recently adopted accounting pronouncements Measurement of Credit Losses In June 2016, the FASB issued ASU 2016-13, Financial Instruments—Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments The amendments require entities to consider historical information, current conditions, and supportable forecasts to estimate expected credit losses, which may result in earlier recognition of losses. The amendments were effective for us on January 1, 2020 and were adopted by applying the modified retrospective transition approach. The adoption did not result in a cumulative effect adjustment to retained earnings on January 1, 2020. As a result of our adoption, see Accounting Policy Updates – Allowance for Doubtful Accounts below. Accounting Policy Updates Allowance for Doubtful Accounts Estimated losses on accounts receivable are provided through an allowance for doubtful accounts. We estimate the allowance for doubtful accounts through various procedures, including extensive review of our trade receivable balances by counterparty, assessing economic events and conditions, our historical experience with counterparties, the counterparty’s financial condition and the amount and age of past due accounts. We continuously evaluate our ability to collect amounts owed to us. Receivables are considered past due if full payment is not received by the contractual due date. These procedures also include performing account reconciliations, dispute resolution and payment confirmation. We may involve our legal counsel to pursue the recovery of defaulted trade receivables. As the financial condition of any counterparty changes, circumstances develop or additional information becomes available, adjustments to our allowance may be required.

Property, Plant and Equipment a

Property, Plant and Equipment and Intangible Assets	6 Months Ended
	Jun. 30, 2020
Property Plant And Equipment And Intangible Assets [Abstract]
Property, Plant and Equipment and Intangible Assets	Note 4 — Property, Plant and Equipment and Intangible Assets June 30, 2020 December 31, 2019 Estimated Useful Lives (In Years) Gathering systems $ 9,117.8 $ 8,976.8 5 to 20 Processing and fractionation facilities 5,666.2 5,137.0 5 to 25 Terminaling and storage facilities 1,498.7 1,495.5 5 to 25 Transportation assets 2,316.3 2,292.4 10 to 50 Other property, plant and equipment 196.2 183.9 3 to 25 Land 159.2 159.7 — Construction in progress 1,304.2 1,576.5 — Finance lease right-of-use assets 51.0 48.8 Property, plant and equipment 20,309.6 19,870.6 Accumulated depreciation, amortization and impairment (7,892.1 ) (5,321.6 ) Property, plant and equipment, net $ 12,417.5 $ 14,549.0 Intangible assets $ 2,643.5 $ 2,643.5 10 to 20 Accumulated amortization and impairment (1,190.7 ) (908.5 ) Intangible assets, net $ 1,452.8 $ 1,735.0 During the preparation of the Company's first quarter 2019 consolidated financial statements, the Company identified an error related to depreciation expense on certain assets that should have been placed in-service during 2018. The Company does not believe this error is material to its previously issued historical consolidated financial statements for any of the periods impacted and accordingly, has not adjusted the historical financial statements. The Company recorded the cumulative impact of a one-time $12.5 million overstatement of depreciation expense during the first quarter of 2019. During the three and six months ended June 30, 2020, depreciation expense was $169.3 million and $370.0 million, respectively. During the three and six months ended June 30, 2019, depreciation expense was $194.3 million and $388.7 million, respectively. Asset Impairments We review and evaluate our long-lived assets, including intangible assets, for impairment when events or changes in circumstances indicate that the related carrying amount of such assets may not be recoverable, and changes to our estimates could have an impact on our assessment of asset recoverability . During the first half of 2020, global commodity prices declined due to factors that significantly impacted both demand and supply. As the COVID-19 pandemic spread, causing travel and other restrictions to be implemented globally, the demand for commodities declined. Additionally, the supply shock late in the first quarter from certain major oil producing nations increasing production also significantly contributed to the sharp drop in commodity prices. While these major oil and gas producing countries subsequently agreed to collectively decrease production, these events, combined with the outbreak of the COVID-19 pandemic, contributed to volatility and depressed commodity prices in the first half of 2020. The drop in commodity prices resulted in prompt reactions from some domestic producers, including significantly reducing capital budgets and resultant drilling activity and shutting-in production. Commodity prices remain weak relative to historical levels and have remained volatile as uncertainty around global commodity supply and demand continues due to the COVID-19 pandemic. In the first quarter of 2020, we determined that indicators of impairment existed for certain asset groups reported primarily within our Gathering and Processing segment. For each asset group for which undiscounted future net cash flows were not sufficient to recover the net book value, fair value was determined through use of discounted estimated cash flows to measure the impairment loss. The estimated cash flows used to assess recoverability of our long-lived assets and measure fair value of our asset groups are derived from current business plans, which are developed using near-term price and volume projections reflective of the current environment and management's projections for long-term average prices and volumes. In addition to near and long-term price assumptions, other key assumptions include volume projections, operating costs, timing of incurring such costs and the use of an appropriate discount rate. We believe our estimates and models used to determine fair value are similar to what a market participant would use. The fair value measurement of our long-lived assets was based, in part, on significant inputs not observable in the market (as discussed above) and thus represents a Level 3 measurement. The significant unobservable inputs used include discount rates and terminal value exit multiples. We utilized a weighted average discount rate of 14.0% when deriving the fair value of the asset groups impaired during the first quarter of 2020. The weighted average discount rate and exit multiples reflect management’s best estimate of inputs a market participant would utilize. In the first quarter of 2020, we recorded non-cash pre-tax impairments of $2,442.8 million primarily associated with the partial impairment of gas processing facilities and gathering systems associated with our Mid-Continent operations and full impairment of our Coastal operations - all of which are in our Gathering and Processing segment. Our first quarter impairment assessment forecasted further decline in natural gas production across the Mid-Continent and Gulf of Mexico. The carrying value adjustments are included in Impairment of long-lived assets in our Consolidated Statements of Operations. There were no indicators of impairment identified during the second quarter of 2020. Intangible Assets Intangible assets consist of customer contracts and customer relationships acquired in prior business combinations. The fair value of these acquired intangible assets were determined at the date of acquisition based on the present values of estimated future cash flows. Amortization expense attributable to these assets is recorded over the periods in which we benefit from services provided to customers. As a result of the triggering events and analysis described above, in the first quarter of 2020, we The estimated annual amortization expense for intangible assets is approximately $144.0 million, $130.9 million, $122.7 million, $117.5 million and $113.7 million for each of the years 2020 through 2024, respectively. The changes in our intangible assets are as follows: Balance at December 31, 2019 $ 1,735.0 Impairment (208.6 ) Amortization (73.6 ) Balance at June 30, 2020 $ 1,452.8

Debt Obligations

Debt Obligations	6 Months Ended
	Jun. 30, 2020
Debt Disclosure [Abstract]
Debt Obligations	Note 5 — Debt Obligations June 30, 2020 December 31, 2019 Current: Accounts receivable securitization facility, due April 2021 $ 250.0 $ 370.0 Finance lease liabilities 11.9 12.2 Current debt obligations 261.9 382.2 Long-term: Senior secured revolving credit facility, variable rate, due June 2023 440.0 — Senior unsecured notes: 5¼ May 2023 559.6 559.6 4¼ November 2023 583.9 583.9 6¾ March 2024 580.1 580.1 5⅛ February 2025 481.0 500.0 5⅞ April 2026 963.2 1,000.0 5⅜ February 2027 468.1 500.0 6½ July 2027 705.2 750.0 5% fixed rate, due January 2028 700.3 750.0 6⅞ January 2029 679.3 750.0 5½ March 2030 949.6 1,000.0 TPL notes, 4¾ November 2021 6.5 6.5 TPL notes, 5⅞ August 2023 48.1 48.1 Unamortized premium 0.2 0.3 7,165.1 7,028.5 Debt issuance costs, net of amortization (43.7 ) (49.1 ) Finance lease liabilities 23.2 25.8 Long-term debt 7,144.6 7,005.2 Total debt obligations $ 7,406.5 $ 7,387.4 Irrevocable standby letters of credit outstanding (2) $ 56.8 $ 88.2 (1) As of June 30, 2020, we had $250.0 million of qualifying receivables under our $250.0 million accounts receivable securitization facility (“Securitization Facility”), resulting in zero availability. During the second quarter of 2020, we amended the Securitization Facility to decrease the facility size from $400.0 million to $250.0 million to more closely align with our expectations for borrowing needs given commodity prices and to extend the facility termination date to April 21, 2021. (2) As of June 30, 2020, availability under our $2.2 billion senior secured revolving credit facility (“TRP Revolver”) was $1,703.2 million. (3) “TPL” refers to Targa Pipeline Partners LP. The following table shows the range of interest rates and weighted average interest rate incurred on variable-rate debt obligations during the six months ended June 30, 2020: Range of Interest Rates Incurred Weighted Average Interest Rate Incurred TRP Revolver 1.9% - 6.0% 2.5% Securitization Facility 1.5% - 2.7% 2.1% Compliance with Debt Covenants As of June 30, 2020, we were in compliance with the covenants contained in our various debt agreements. Debt Repurchases During the six months ended June 30, 2020, we repurchased a portion of our outstanding senior notes on the open market as follows: Debt Repurchased Book Value Payment Gain Write-off of Debt Issuance Costs Net Gain 5⅛% Senior Notes due 2025 $ 19.0 $ (14.6 ) $ 4.4 $ (0.1 ) $ 4.3 5⅞% Senior Notes due 2026 36.8 (29.7 ) 7.1 (0.2 ) 6.9 5⅜% Senior Notes due 2027 31.9 (26.6 ) 5.3 (0.2 ) 5.1 6½% Senior Notes due 2027 44.8 (35.5 ) 9.3 (0.4 ) 8.9 5% Senior Notes due 2028 49.7 (38.0 ) 11.7 (0.4 ) 11.3 6⅞% Senior Notes due 2029 70.7 (55.2 ) 15.5 (0.6 ) 14.9 5½% Senior Notes due 2030 50.4 (40.2 ) 10.2 (0.5 ) 9.7 $ 303.3 $ (239.8 ) $ 63.5 $ (2.4 ) $ 61.1 We may retire or purchase various series of our outstanding debt through cash purchases and/or exchanges for other debt, in open market purchases, privately negotiated transactions or otherwise. Such repurchases or exchanges, if any, will depend on prevailing market conditions, our liquidity requirements, contractual restrictions and other factors. The amounts involved may be material. Contractual Obligations The following table summarizes payment obligations for debt instruments after giving effect to the debt repurchases detailed above: Payments Due By Period Less Than More Than Total 1 Year 1-3 Years 3-5 Years 5 Years (in millions) Long-term debt obligations (1) $ 7,164.9 $ - $ 1,006.1 $ 1,693.1 $ 4,465.7 Interest on debt obligations (2) 2,475.0 397.8 792.6 600.7 683.9 $ 9,639.9 $ 397.8 $ 1,798.7 $ 2,293.8 $ 5,149.6 ____________________________________________________________________________________________ (1) Represents scheduled future maturities of consolidated debt obligations for the periods indicated. (2) Represents interest expense on debt obligations based on both fixed debt interest rates and prevailing June 30, 2020 rates for floating debt.

Other Long-term Liabilities

Other Long-term Liabilities	6 Months Ended
	Jun. 30, 2020
Other Liabilities Noncurrent [Abstract]
Other Long-term Liabilities	Note 6 — Other Long-term Liabilities Other long-term liabilities are comprised of deferred revenue, asset retirement obligations and operating lease liabilities. Deferred Revenue We have certain long-term contractual arrangements for which we have received consideration that we are not yet able to recognize as revenue. The resulting deferred revenue will be recognized once all conditions for revenue recognition have been met. Deferred revenue as of June 30, 2020 and December 31, 2019, was $170.3 million and $172.0 million, respectively, which includes $129.0 million of payments received from Vitol Americas Corp. (“Vitol”) (formerly known as Noble Americas Corp.), a subsidiary of Vitol US Holding Co., in 2016, 2017, and 2018 as part of an agreement (the “Splitter Agreement”) related to the construction and operation of a crude oil and condensate splitter. In December 2018, Vitol elected to terminate the Splitter Agreement. The Splitter Agreement provides that the first three annual payments are ours if Vitol elects to terminate, which Vitol disputes. The timing of revenue recognition related to the Splitter Agreement deferred revenue is dependent on the outcome of current litigation with Vitol. Deferred revenue also includes nonmonetary consideration received in a 2015 amendment to a gas gathering and processing agreement and consideration received for other construction activities of facilities connected to our systems.

Partnership Units and Related M

Partnership Units and Related Matters	6 Months Ended
	Jun. 30, 2020
Partners Capital [Abstract]
Partnership Units and Related Matters	Note 7 — Partnership Units and Related Matters Distributions TRC is entitled to receive all Partnership distributions after payment of preferred unit distributions each quarter. The following table details the distributions declared and paid by us for the six months ended June 30, 2020: Three Months Ended Date Paid or To Be Paid Total Distributions Distributions to Targa Resources Corp. June 30, 2020 August 13, 2020 $ 51.7 $ 48.9 March 31, 2020 May 13, 2020 53.1 50.3 December 31, 2019 February 13, 2020 241.9 239.1 Contributions All capital contributions to us continue to be allocated 98% to the limited partner and 2% to our general partner; however, no units will be issued for those contributions. During the second quarter of 2020, TRC made contributions to us of $50.0 million. Preferred Units Our Preferred Units rank senior to our common units with respect to the distribution rights. Distributions on our 5,000,000 Preferred Units are cumulative from the date of original issue in October 2015 and are payable monthly in arrears on the 15th day of each month of each year, when, as and if declared by the board of directors of our general partner. Distributions on our Preferred Units are payable out of amounts legally available at a rate equal to 9.0% per annum. On and after November 1, 2020, distributions on our Preferred Units will accumulate at an annual floating rate equal to the one-month LIBOR plus a spread of 7.71%. We paid $2.8 million and $5.6 million of distributions to the holders of Preferred Units (“Preferred Unitholders”) for the three and six months ended June 30, 2020. Subsequent Event In July 2020, the board of directors of our general partner declared a cash distribution of $0.1875 per Preferred Unit, resulting in approximately $0.9 million in distributions that will be paid on August 17, 2020.

Derivative Instruments and Hedg

Derivative Instruments and Hedging Activities	6 Months Ended
	Jun. 30, 2020
Derivative Instruments And Hedging Activities Disclosure [Abstract]
Derivative Instruments and Hedging Activities	Note 8 — Derivative Instruments and Hedging Activities The primary purposes of our commodity risk management activities are to manage our exposure to commodity price risk and reduce volatility in our operating cash flow due to fluctuations in commodity prices. We have entered into derivative instruments to hedge the commodity price risks associated with a portion of our expected (i) natural gas, NGL, and condensate equity volumes in our Gathering and Processing operations that result from percent-of-proceeds processing arrangements, (ii) future commodity purchases and sales in our Logistics and Transportation segment and (iii) natural gas transportation basis risk in our Logistics and Transportation segment. The hedge positions associated with (i) and (ii) above will move favorably in periods of falling commodity prices and unfavorably in periods of rising commodity prices and are designated as cash flow hedges for accounting purposes. The hedges generally match the NGL product composition and the NGL delivery points of our physical equity volumes. Our natural gas hedges are a mixture of specific gas delivery points and Henry Hub. The NGL hedges may be transacted as specific NGL hedges or as baskets of ethane, propane, normal butane, isobutane and natural gasoline based upon our 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. Our natural gas and NGL hedges are settled using published index prices for delivery at various locations. We hedge a portion of our condensate equity volumes 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 exposes us to a market differential risk if the NYMEX futures do not move in exact parity with the sales price of our underlying condensate equity volumes. We also enter into derivative instruments to help manage other short-term commodity-related business risks. We have not designated these derivatives as hedges and record changes in fair value and cash settlements to revenues. At June 30, 2020, the notional volumes of our commodity derivative contracts were: Commodity Instrument Unit 2020 2021 2022 2023 2024 2025 Natural Gas Swaps MMBtu/d 167,230 166,216 86,100 20,000 - - Natural Gas Basis Swaps MMBtu/d 416,374 450,566 295,390 250,000 90,000 5,000 NGL Swaps Bbl/d 30,814 23,729 12,371 - - - NGL Futures Bbl/d 39,370 12,288 - - - - Condensate Swaps Bbl/d 5,190 5,864 1,610 - - - Our derivative contracts are subject to netting arrangements that permit our contracting subsidiaries to net cash settle offsetting asset and liability positions with the same counterparty within the same Targa entity. 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 value of our derivative instruments and their location on 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 June 30, 2020 Fair Value as of December 31, 2019 Balance Sheet Derivative Derivative Derivative Derivative Location Assets Liabilities Assets Liabilities Derivatives designated as hedging instruments Commodity contracts Current $ 99.2 $ 74.6 $ 102.1 $ 11.6 Long-term 36.1 32.6 33.7 6.4 Total derivatives designated as hedging instruments $ 135.3 $ 107.2 $ 135.8 $ 18.0 Derivatives not designated as hedging instruments Commodity contracts Current $ 22.8 $ 5.9 $ 1.2 $ 92.5 Long-term 7.2 20.3 1.8 34.4 Total derivatives not designated as hedging instruments $ 30.0 $ 26.2 $ 3.0 $ 126.9 Total current position $ 122.0 $ 80.5 $ 103.3 $ 104.1 Total long-term position 43.3 52.9 35.5 40.8 Total derivatives $ 165.3 $ 133.4 $ 138.8 $ 144.9 The pro forma impact of reporting derivatives on our Consolidated Balance Sheets on a net basis is as follows: Gross Presentation Pro Forma Net Presentation June 30, 2020 Asset Liability Collateral Asset Liability Current Position Counterparties with offsetting positions or collateral $ 108.9 $ (80.5 ) $ 48.2 $ 76.6 $ - Counterparties without offsetting positions - assets 13.1 - - 13.1 - Counterparties without offsetting positions - liabilities - - - - - 122.0 (80.5 ) 48.2 89.7 - Long Term Position Counterparties with offsetting positions or collateral 31.5 (49.3 ) - 6.6 (24.4 ) Counterparties without offsetting positions - assets 11.8 - - 11.8 - Counterparties without offsetting positions - liabilities - (3.6 ) - - (3.6 ) 43.3 (52.9 ) - 18.4 (28.0 ) Total Derivatives Counterparties with offsetting positions or collateral 140.4 (129.8 ) 48.2 83.2 (24.4 ) Counterparties without offsetting positions - assets 24.9 - - 24.9 - Counterparties without offsetting positions - liabilities - (3.6 ) - - (3.6 ) $ 165.3 $ (133.4 ) $ 48.2 $ 108.1 $ (28.0 ) Gross Presentation Pro Forma Net Presentation December 31, 2019 Asset Liability Collateral Asset Liability Current Position Counterparties with offsetting positions or collateral $ 99.8 $ (85.0 ) $ (4.9 ) $ 56.0 $ (46.1 ) Counterparties without offsetting positions - assets 3.5 - - 3.5 - Counterparties without offsetting positions - liabilities - (19.1 ) - - (19.1 ) 103.3 (104.1 ) (4.9 ) 59.5 (65.2 ) Long Term Position Counterparties with offsetting positions or collateral 33.3 (40.5 ) - 18.1 (25.3 ) Counterparties without offsetting positions - assets 2.2 - - 2.2 - Counterparties without offsetting positions - liabilities - (0.3 ) - - (0.3 ) 35.5 (40.8 ) - 20.3 (25.6 ) Total Derivatives Counterparties with offsetting positions or collateral 133.1 (125.5 ) (4.9 ) 74.1 (71.4 ) Counterparties without offsetting positions - assets 5.7 - - 5.7 - Counterparties without offsetting positions - liabilities - (19.4 ) - - (19.4 ) $ 138.8 $ (144.9 ) $ (4.9 ) $ 79.8 $ (90.8 ) Our payment obligations in connection with a majority of these hedging transactions are secured by a first priority lien in the collateral securing the TRP Revolver that ranks equal in right of payment with liens granted in favor of our senior secured lenders. Some of our hedges are futures contracts executed through broker s that clear the hedges through an exchange. We maintain a margin deposit with the broker s in an amount sufficient enough to cover the fair value of our open futures positions. The margin deposit is considered collateral, which is located within Deposits on our Consolidated Balance Sheets and is not offset against the fair value of our derivative instruments. The fair value of our 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 our derivative instruments was a net asset of $31.9 million as of June 30, 2020. The estimated fair value is net of an adjustment for credit risk based on the default probabilities as indicated by market quotes for the counterparties’ credit default swap rates. The credit risk adjustment was immaterial for all periods presented. Our futures contracts that are cleared through an exchange are margined daily and do not require any credit adjustment. The following tables reflect amounts recorded in Other comprehensive income (“OCI”) and amounts reclassified from OCI to revenue for the periods indicated: Gain (Loss) Recognized in OCI on Derivatives (Effective Portion) Derivatives in Cash Flow Three Months Ended June 30, Six Months Ended June 30, Hedging Relationships 2020 2019 2020 2019 Commodity contracts $ (132.9 ) $ 88.4 $ 26.2 $ 49.6 Gain (Loss) Reclassified from OCI into Income (Effective Portion) Three Months Ended June 30, Six Months Ended June 30, Location of Gain (Loss) 2020 2019 2020 2019 Revenues $ 60.2 $ 43.3 $ 120.3 $ 64.6 Based on valuations as of June 30, 2020, we expect to reclassify commodity hedge-related deferred gains of $29.8 million included in accumulated other comprehensive income into earnings before income taxes through the end of 2023, with $26.3 million of gains to be reclassified over the next twelve months. Our consolidated earnings are also affected by the 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 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. For the three and six months ended June 30, 2020, the unrealized mark-to-market gains are primarily attributable to favorable movements in natural gas forward basis prices, as compared to our hedged positions. Location of Gain Gain (Loss) Recognized in Income on Derivatives Derivatives Not Designated Recognized in Income on Three Months Ended June 30, Six Months Ended June 30, as Hedging Instruments Derivatives 2020 2019 2020 2019 Commodity contracts Revenue $ 8.1 $ (1.1 ) $ 107.8 $ (10.5 ) See Note 9 – Fair Value Measurements and Note 14 – Segment Information for additional disclosures related to derivative instruments and hedging activities.

Fair Value Measurements

Fair Value Measurements	6 Months Ended
	Jun. 30, 2020
Fair Value Disclosures [Abstract]
Fair Value Measurements	Note 9 — Fair Value Measurements Under GAAP, our Consolidated Balance Sheets reflect a mixture of measurement methods for financial assets and liabilities (“financial instruments”). Derivative financial instruments and contingent consideration related to business acquisitions are reported at fair value on our Consolidated Balance Sheets. Other financial instruments are reported at historical cost or amortized cost on our Consolidated Balance Sheets. The following are additional qualitative and quantitative disclosures regarding fair value measurements of financial instruments. Fair Value of Derivative Financial Instruments Our derivative instruments consist of financially settled commodity swaps, futures, option contracts and fixed-price forward commodity contracts with certain counterparties. We determine the fair value of our derivative contracts using present value methods or standard option valuation models with assumptions about commodity prices based on those observed in underlying markets. We have consistently applied these valuation techniques in all periods presented and we believe we have obtained the most accurate information available for the types of derivative contracts we hold. The fair values of our derivative instruments are sensitive to changes in forward pricing on natural gas, NGLs and crude oil. The financial position of these derivatives at June 30, 2020, a net asset position of $31.9 million, reflects the present value, adjusted for counterparty credit risk, of the amount we expect to receive or pay in the future on our 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 $(86.5) million. 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 $150.7 million. Fair Value of Other Financial Instruments 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. Long-term debt is primarily the other financial instrument for which carrying value could vary significantly from fair value. We determined the supplemental fair value disclosures for our long-term debt as follows: • The TRP Revolver and the Securitization Facility are based on carrying value, which approximates fair value as their interest rates are based on prevailing market rates; and • Senior unsecured notes are based on quoted market prices derived from trades of the debt. Contingent consideration liabilities related to business acquisitions are carried at fair value until the end of the related earn-out period. Fair Value Hierarchy We categorize the inputs to the fair value measurements of financial assets and liabilities at each balance sheet reporting date 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 on our Consolidated Balance Sheets at fair value and (2) supplemental fair value disclosures for other financial instruments: June 30, 2020 Fair Value Carrying Value Total Level 1 Level 2 Level 3 Financial Instruments Recorded on Our Consolidated Balance Sheets at Fair Value: Assets from commodity derivative contracts (1) $ 164.0 $ 164.0 $ — $ 164.0 $ — Liabilities from commodity derivative contracts (1) 132.1 132.1 — 132.1 — TPL contingent consideration (2) 2.3 2.3 — — 2.3 Financial Instruments Recorded on Our Consolidated Balance Sheets at Carrying Value: Cash and cash equivalents 173.6 173.6 — — — TRP Revolver 440.0 440.0 — 440.0 — Senior unsecured notes 6,725.1 6,627.2 — 6,627.2 — Securitization Facility 250.0 250.0 — 250.0 — December 31, 2019 Fair Value Carrying Value Total Level 1 Level 2 Level 3 Financial Instruments Recorded on Our Consolidated Balance Sheets at Fair Value: Assets from commodity derivative contracts (1) $ 136.5 $ 136.5 $ — $ 136.2 $ 0.3 Liabilities from commodity derivative contracts (1) 142.6 142.6 — 142.0 0.6 TPL contingent consideration (2) 2.3 2.3 — — 2.3 Financial Instruments Recorded on Our Consolidated Balance Sheets at Carrying Value: Cash and cash equivalents 291.1 291.1 — — — TRP Revolver — — — — — Senior unsecured notes 7,028.5 7,376.9 — 7,376.9 — Securitization Facility 370.0 370.0 — 370.0 — (1) The fair value of derivative contracts in this table is presented on a different basis than the Consolidated Balance Sheets presentation as disclosed in Note 8– Derivative Instruments and Hedging Activities. The above fair values reflect the total value of each derivative contract taken as a whole, whereas the Consolidated Balance Sheets presentation is based on the individual maturity dates of estimated future settlements. As such, an individual contract could have both an asset and liability position when segregated into its current and long-term portions for Consolidated Balance Sheets classification purposes. (2) We have a contingent consideration liability for TPL’s previous acquisition of a gas gathering system and related assets, which is carried at fair value. Additional Information Regarding Level 3 Fair Value Measurements Included on Our Consolidated Balance Sheets We reported certain of our swaps and option contracts at fair value using Level 3 inputs due to such derivatives not having observable market prices or implied volatilities 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 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. The significant unobservable inputs used in the fair value measurements of our Level 3 derivatives were (i) the forward natural gas liquids pricing curves, for which a significant portion of the derivative’s term is beyond available forward pricing and (ii) implied volatilities, which are unobservable as a result of inactive natural gas liquids options trading. 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 was immaterial. As of June 30, 2020, we had no commodity swap and option contracts categorized as Level 3. The fair value of the TPL contingent consideration was determined using a probability-based model measuring the likelihood of meeting certain volumetric measures. The inputs are not observable; therefore, the entire valuation of the contingent consideration is categorized in Level 3. The following table summarizes the changes in fair value of our financial instruments classified as Level 3 in the fair value hierarchy: Commodity Derivative Contracts Contingent Asset/(Liability) Consideration Balance, December 31, 2019 $ (0.3 ) $ (2.3 ) Transfers out of Level 3 (1) 0.3 — Balance, June 30, 2020 $ — $ (2.3 ) (1) Transfers relate to long-term over-the-counter swaps for NGL products for which observable market prices became available for substantially their full term. Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis Nonfinancial assets and liabilities, such as long-lived assets, are measured at fair value on a nonrecurring basis upon impairment. In the first quarter of 2020, we recorded non-cash pre-tax impairments of $2,442.8 million. The impairment charge is primarily associated with the partial impairment of gas processing facilities and gathering systems associated with our Mid-Continent operations and full impairment of our Coastal operations. For disclosures related to valuation techniques, see Note 4 – Property, Plant and Equipment and Intangible Assets. The techniques described above may produce a fair value calculation that may not be indicative or reflective of future fair values. Furthermore, while we believe our valuation techniques are appropriate and consistent with other market participants, the use of different techniques or assumptions to determine fair value of certain financial and nonfinancial assets and liabilities could result in a different fair value measurement at the reporting date.

Related Party Transactions - Ta

Related Party Transactions - Targa	6 Months Ended
	Jun. 30, 2020
Related Party Transactions [Abstract]
Related Party Transactions - Targa	Note 10 — Related Party Transactions – Targa Relationship with Targa We do not have any employees. Targa provides operational, general and administrative and other services to us associated with our existing assets and assets acquired from third parties. Targa performs centralized corporate functions for us, such as legal, accounting, treasury, insurance, risk management, health, safety and environmental, information technology, human resources, credit, payroll, internal audit, taxes, engineering and marketing. Our Partnership Agreement governs the reimbursement of costs incurred by Targa on behalf of us. Targa charges us for all the direct costs of the employees assigned to our operations, as well as all general and administrative support costs other than costs attributable to Targa’s status as a separate reporting company. We generally reimburse Targa monthly for cost allocations to the extent that Targa has made a cash outlay. The following table summarizes transactions with Targa: Three Months Ended June 30, Six Months Ended June 30, 2020 2019 2020 2019 Targa billings of payroll and related costs included in operating expenses $ 66.6 $ 61.6 $ 132.2 $ 115.7 Targa allocation of general and administrative expense 56.0 61.1 108.5 128.8 Cash distributions to Targa based on general partner and limited partner ownership 50.3 435.0 289.4 673.5 Cash contributions from Targa related to limited partner ownership (1) 49.0 186.2 49.0 186.2 Cash contributions from Targa to maintain its 2% general partner ownership 1.0 3.8 1.0 3.8 ____________________________________________________________________________________________________________ (1) The cash contributions from Targa related to limited partner ownership were allocated 98% to the limited partner and 2% to general partner. See Note 7 – Partnership Units and Related Matters.

Contingencies

Contingencies	6 Months Ended
	Jun. 30, 2020
Loss Contingency [Abstract]
Contingencies	Note 11 – Contingencies Legal Proceedings We are a party to various legal, administrative and regulatory proceedings that have arisen in the ordinary course of our business. We are also a party to various proceedings with governmental environmental agencies, including but not limited to the U.S. Environmental Protection Agency, Texas Commission on Environmental Quality, Oklahoma Department of Environmental Quality, New Mexico Environment Department, Louisiana Department of Environmental Quality and North Dakota Department of Environmental Quality, which assert monetary sanctions for alleged violations of environmental regulations, including air emissions, discharges into the environment and reporting deficiencies, related to events that have arisen at certain of our facilities in the ordinary course of our business.

Revenue

Revenue	6 Months Ended
	Jun. 30, 2020
Revenue From Contract With Customer [Abstract]
Revenue	Note 12 – Revenue Fixed consideration allocated to remaining performance obligations The following table includes the estimated minimum revenue expected to be recognized in the future related to performance obligations that are unsatisfied (or partially unsatisfied) at the end of the reporting period and is comprised of fixed consideration primarily attributable to contracts with minimum volume commitments and for which a guaranteed amount of revenue can be calculated . These contracts are comprised primarily of gathering and processing, fractionation, export, terminaling and storage agreements. 2020 2021 2022 and after Fixed consideration to be recognized as of June 30, 2020 $ 270.6 $ 515.0 $ 3,202.7 In accordance with the optional exemptions that we elected to apply, the amounts presented in the table above exclude variable consideration for which the allocation exception is met and consideration associated with performance obligations of short-term contracts. In addition, consideration from contracts for which we recognize revenue at the amount that we have the right to invoice for services performed is also excluded from the table above, with the exception of any fixed consideration attributable to such contracts. The nature of the performance obligations for which the consideration has been excluded is consistent with the performance obligations described within our revenue recognition accounting policy; the estimated remaining duration of such contracts primarily ranges from 1 to 19 years. In addition, variability exists in the consideration excluded due to the unknown quantity and composition of volumes to be serviced or sold as well as fluctuations in the market price of commodities to be received as consideration or sold over the applicable remaining contract terms. Such variability is resolved at the end of each future month or quarter. For disclosures related to disaggregated revenue, see Note 14 – Segment Information.

Supplemental Cash Flow Informat

Supplemental Cash Flow Information	6 Months Ended
	Jun. 30, 2020
Supplemental Cash Flow Elements [Abstract]
Supplemental Cash Flow Information	Note 13 — Supplemental Cash Flow Information Six Months Ended June 30, 2020 2019 Cash: Interest paid, net of capitalized interest (1) $ 165.3 $ 106.2 Income taxes paid, net of refunds 0.1 (1.7 ) Non-cash investing activities: Impact of capital expenditure accruals on property, plant and equipment, net (143.9 ) (4.3 ) Transfers from materials and supplies inventory to property, plant and equipment 1.8 16.4 Non-cash financing activities: Changes in accrued distributions to noncontrolling interests $ (1.9 ) $ 49.6 __________________ (1) Interest capitalized on major projects was $22.5 million and $36.1 million for the six months ended June 30, 2020 and 2019.

Segment Information

Segment Information	6 Months Ended
	Jun. 30, 2020
Segment Reporting [Abstract]
Segment Information	Note 14 — Segment Information We operate in two primary segments: (i) Gathering and Processing, and (ii) Logistics and Transportation (also referred to as the Downstream Business). Our reportable segments include operating segments that have been aggregated based on the nature of the products and services provided. Our Gathering and Processing segment 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; and assets used for crude oil gathering and terminaling. The Gathering and Processing segment's assets are located in the Permian Basin of West Texas and Southeast New Mexico (including the Midland, Central and Delaware Basins); the Eagle Ford Shale in South Texas; the Barnett Shale in North Texas; the Anadarko, Ardmore, and Arkoma Basins in Oklahoma (including the SCOOP and STACK) and South Central Kansas; the Williston Basin in North Dakota (including the Bakken and Three Forks plays); and the onshore and near offshore regions of the Louisiana Gulf Coast and the Gulf of Mexico. Our Logistics and Transportation segment includes the activities and assets necessary to convert mixed NGLs into NGL products and also includes other assets and value-added services such as transporting, storing, fractionating, terminaling and marketing of NGLs and NGL products, including services to LPG exporters; and certain natural gas supply and marketing activities in support of our other businesses. The Logistics and Transportation segment also includes the Grand Prix NGL pipeline (“Grand Prix”), which connects our gathering and processing positions in the Permian Basin, Southern Oklahoma and North Texas with our downstream facilities in Mont Belvieu, Texas. The associated assets are generally connected to and supplied in part by our Gathering and Processing segment and, except for pipelines and smaller terminals, are located predominantly in Mont Belvieu and Galena Park, Texas, and in Lake Charles, Louisiana. Other contains the mark-to-market gains/losses related to derivative contracts that were not designated as cash flow hedges. Elimination of inter-segment transactions are reflected in the corporate and eliminations column. Reportable segment information is shown in the following tables: Three Months Ended June 30, 2020 Gathering and Processing Logistics and Transportation Other Corporate and Eliminations Total Revenues Sales of commodities $ 133.5 $ 1,136.3 $ 10.8 $ — $ 1,280.6 Fees from midstream services 110.0 132.9 — — 242.9 243.5 1,269.2 10.8 — 1,523.5 Intersegment revenues Sales of commodities 389.2 46.1 — (435.3 ) — Fees from midstream services 1.5 7.3 — (8.8 ) — 390.7 53.4 — (444.1 ) — Revenues $ 634.2 $ 1,322.6 $ 10.8 $ (444.1 ) $ 1,523.5 Operating margin $ 237.2 $ 231.5 $ 10.8 $ — $ 479.5 Other financial information: Total assets (1) $ 9,124.2 $ 6,697.2 $ 22.0 $ 72.9 $ 15,916.3 Goodwill $ 45.2 $ — $ — $ — $ 45.2 Capital expenditures $ 37.1 $ 127.9 $ — $ 4.6 $ 169.6 (1) Assets in the Corporate and Eliminations column primarily include cash, prepaids and debt issuance costs for our TRP Revolver. Three Months Ended June 30, 2019 Gathering and Processing Logistics and Transportation Other Corporate and Eliminations Total Revenues Sales of commodities $ 298.4 $ 1,378.8 $ 7.0 $ — $ 1,684.2 Fees from midstream services 176.2 134.9 — — 311.1 474.6 1,513.7 7.0 — 1,995.3 Intersegment revenues Sales of commodities 539.7 43.6 — (583.3 ) — Fees from midstream services 1.5 7.0 — (8.5 ) — 541.2 50.6 — (591.8 ) — Revenues $ 1,015.8 $ 1,564.3 $ 7.0 $ (591.8 ) $ 1,995.3 Operating margin $ 232.1 $ 184.4 $ 7.0 $ — $ 423.5 Other financial information: Total assets (1) $ 12,144.4 $ 5,994.7 $ 19.0 $ 94.6 $ 18,252.7 Goodwill $ 46.6 $ — $ — $ — $ 46.6 Capital expenditures $ 420.8 $ 425.5 $ — $ 10.8 $ 857.1 (1) Assets in the Corporate and Eliminations column primarily include cash, prepaids and debt issuance costs for our TRP Revolver. Six Months Ended June 30, 2020 Gathering and Processing Logistics and Transportation Other Corporate and Eliminations Total Revenues Sales of commodities $ 377.3 $ 2,555.7 $ 127.2 $ — $ 3,060.2 Fees from midstream services 228.2 284.0 — — 512.2 605.5 2,839.7 127.2 — 3,572.4 Intersegment revenues Sales of commodities 832.4 102.7 — (935.1 ) — Fees from midstream services 3.3 15.4 — (18.7 ) — 835.7 118.1 — (953.8 ) — Revenues $ 1,441.2 $ 2,957.8 $ 127.2 $ (953.8 ) $ 3,572.4 Operating margin $ 492.8 $ 525.5 $ 127.2 $ — $ 1,145.5 Other financial information: Total assets (1) $ 9,124.2 $ 6,697.2 $ 22.0 $ 72.9 $ 15,916.3 Goodwill $ 45.2 $ — $ — $ — $ 45.2 Capital expenditures $ 154.6 $ 306.3 $ — $ 12.9 $ 473.8 (1) Assets in the Corporate and Eliminations column primarily include cash, prepaids and debt issuance costs for our TRP Revolver. Six Months Ended June 30, 2019 Gathering and Processing Logistics and Transportation Other Corporate and Eliminations Total Revenues Sales of commodities $ 555.1 $ 3,105.6 $ — $ — $ 3,660.7 Fees from midstream services 376.1 257.9 — — 634.0 931.2 3,363.5 — — 4,294.7 Intersegment revenues Sales of commodities 1,362.5 82.1 — (1,444.6 ) — Fees from midstream services 3.3 12.5 — (15.8 ) — 1,365.8 94.6 — (1,460.4 ) — Revenues $ 2,297.0 $ 3,458.1 $ — $ (1,460.4 ) $ 4,294.7 Operating margin $ 470.3 $ 336.3 $ — $ — $ 806.6 Other financial information: Total assets (1) $ 12,144.4 $ 5,994.7 $ 19.0 $ 94.6 $ 18,252.7 Goodwill $ 46.6 $ — $ — $ — $ 46.6 Capital expenditures $ 838.5 $ 896.3 $ — $ 27.8 $ 1,762.6 (1) Assets in the Corporate and Eliminations column primarily include cash, prepaids and debt issuance costs for our TRP Revolver. The following table shows our consolidated revenues disaggregated by product and service for the periods presented: Three Months Ended June 30, Six Months Ended June 30, 2020 2019 2020 2019 Sales of commodities: Revenue recognized from contracts with customers: Natural gas $ 269.7 $ 217.6 $ 542.8 $ 628.9 NGL 908.2 1,195.5 2,069.5 2,591.9 Condensate and crude oil 27.6 172.1 163.3 309.8 Petroleum products 6.8 56.8 56.5 76.0 1,212.3 1,642.0 2,832.1 3,606.6 Non-customer revenue: Derivative activities - Hedge 60.2 43.3 120.3 64.6 Derivative activities - Non-hedge (1) 8.1 (1.1 ) 107.8 (10.5 ) 68.3 42.2 228.1 54.1 Total sales of commodities 1,280.6 1,684.2 3,060.2 3,660.7 Fees from midstream services: Revenue recognized from contracts with customers: Gathering and processing 107.4 177.5 223.3 371.9 NGL transportation, fractionation and services 32.9 40.1 72.8 76.3 Storage, terminaling and export 89.1 90.4 188.8 170.0 Other 13.5 3.1 27.3 15.8 Total fees from midstream services 242.9 311.1 512.2 634.0 Total revenues $ 1,523.5 $ 1,995.3 $ 3,572.4 $ 4,294.7 (1) Represents derivative activities that are not designated as hedging instruments under ASC 815. The following table shows a reconciliation of reportable segment operating margin to income (loss) before income taxes for the periods presented: Three Months Ended June 30, Six Months Ended June 30, 2020 2019 2020 2019 Reconciliation of reportable segment operating margin to income (loss) before income taxes: Gathering and Processing operating margin $ 237.2 $ 232.1 $ 492.8 $ 470.3 Logistics and Transportation operating margin 231.5 184.4 525.5 336.3 Other operating margin 10.8 7.0 127.2 — Depreciation and amortization expense (204.5 ) (237.2 ) (443.6 ) (474.6 ) General and administrative expense (58.6 ) (69.3 ) (115.5 ) (146.7 ) Impairment of long-lived assets — — (2,442.8 ) — Interest expense, net (94.3 ) (69.5 ) (188.1 ) (144.9 ) Equity earnings (loss) 14.9 3.2 35.5 5.9 Gain (loss) on sale or disposition of business and assets 0.7 0.2 - (3.1 ) Gain (loss) from financing activities 21.8 — 61.1 (1.4 ) Change in contingent considerations — 0.8 — (8.9 ) Other, net (0.3 ) — (0.8 ) (0.2 ) Income (loss) before income taxes $ 159.2 $ 51.7 $ (1,948.7 ) $ 32.7

Significant Accounting Polici_2

Significant Accounting Policies (Policies)	6 Months Ended
	Jun. 30, 2020
Accounting Policies [Abstract]
Recent Accounting Pronouncements	Recent Accounting Pronouncements Recently adopted accounting pronouncements Measurement of Credit Losses In June 2016, the FASB issued ASU 2016-13, Financial Instruments—Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments The amendments require entities to consider historical information, current conditions, and supportable forecasts to estimate expected credit losses, which may result in earlier recognition of losses. The amendments were effective for us on January 1, 2020 and were adopted by applying the modified retrospective transition approach. The adoption did not result in a cumulative effect adjustment to retained earnings on January 1, 2020. As a result of our adoption, see Accounting Policy Updates – Allowance for Doubtful Accounts below.
Allowance for Doubtful Accounts	Allowance for Doubtful Accounts Estimated losses on accounts receivable are provided through an allowance for doubtful accounts. We estimate the allowance for doubtful accounts through various procedures, including extensive review of our trade receivable balances by counterparty, assessing economic events and conditions, our historical experience with counterparties, the counterparty’s financial condition and the amount and age of past due accounts. We continuously evaluate our ability to collect amounts owed to us. Receivables are considered past due if full payment is not received by the contractual due date. These procedures also include performing account reconciliations, dispute resolution and payment confirmation. We may involve our legal counsel to pursue the recovery of defaulted trade receivables. As the financial condition of any counterparty changes, circumstances develop or additional information becomes available, adjustments to our allowance may be required.

Property, Plant and Equipment_2

Property, Plant and Equipment and Intangible Assets (Tables)	6 Months Ended
	Jun. 30, 2020
Property Plant And Equipment And Intangible Assets [Abstract]
Property, Plant and Equipment and Intangible Assets	June 30, 2020 December 31, 2019 Estimated Useful Lives (In Years) Gathering systems $ 9,117.8 $ 8,976.8 5 to 20 Processing and fractionation facilities 5,666.2 5,137.0 5 to 25 Terminaling and storage facilities 1,498.7 1,495.5 5 to 25 Transportation assets 2,316.3 2,292.4 10 to 50 Other property, plant and equipment 196.2 183.9 3 to 25 Land 159.2 159.7 — Construction in progress 1,304.2 1,576.5 — Finance lease right-of-use assets 51.0 48.8 Property, plant and equipment 20,309.6 19,870.6 Accumulated depreciation, amortization and impairment (7,892.1 ) (5,321.6 ) Property, plant and equipment, net $ 12,417.5 $ 14,549.0 Intangible assets $ 2,643.5 $ 2,643.5 10 to 20 Accumulated amortization and impairment (1,190.7 ) (908.5 ) Intangible assets, net $ 1,452.8 $ 1,735.0
Schedule of Changes in Intangible Assets	The changes in our intangible assets are as follows: Balance at December 31, 2019 $ 1,735.0 Impairment (208.6 ) Amortization (73.6 ) Balance at June 30, 2020 $ 1,452.8

Debt Obligations (Tables)

Debt Obligations (Tables)	6 Months Ended
	Jun. 30, 2020
Debt Disclosure [Abstract]
Schedule of Outstanding Debt	June 30, 2020 December 31, 2019 Current: Accounts receivable securitization facility, due April 2021 $ 250.0 $ 370.0 Finance lease liabilities 11.9 12.2 Current debt obligations 261.9 382.2 Long-term: Senior secured revolving credit facility, variable rate, due June 2023 440.0 — Senior unsecured notes: 5¼ May 2023 559.6 559.6 4¼ November 2023 583.9 583.9 6¾ March 2024 580.1 580.1 5⅛ February 2025 481.0 500.0 5⅞ April 2026 963.2 1,000.0 5⅜ February 2027 468.1 500.0 6½ July 2027 705.2 750.0 5% fixed rate, due January 2028 700.3 750.0 6⅞ January 2029 679.3 750.0 5½ March 2030 949.6 1,000.0 TPL notes, 4¾ November 2021 6.5 6.5 TPL notes, 5⅞ August 2023 48.1 48.1 Unamortized premium 0.2 0.3 7,165.1 7,028.5 Debt issuance costs, net of amortization (43.7 ) (49.1 ) Finance lease liabilities 23.2 25.8 Long-term debt 7,144.6 7,005.2 Total debt obligations $ 7,406.5 $ 7,387.4 Irrevocable standby letters of credit outstanding (2) $ 56.8 $ 88.2 (1) As of June 30, 2020, we had $250.0 million of qualifying receivables under our $250.0 million accounts receivable securitization facility (“Securitization Facility”), resulting in zero availability. During the second quarter of 2020, we amended the Securitization Facility to decrease the facility size from $400.0 million to $250.0 million to more closely align with our expectations for borrowing needs given commodity prices and to extend the facility termination date to April 21, 2021. (2) As of June 30, 2020, availability under our $2.2 billion senior secured revolving credit facility (“TRP Revolver”) was $1,703.2 million. (3) “TPL” refers to Targa Pipeline Partners LP.
Interest Rates Incurred on Variable-Rate Debt Obligations	The following table shows the range of interest rates and weighted average interest rate incurred on variable-rate debt obligations during the six months ended June 30, 2020: Range of Interest Rates Incurred Weighted Average Interest Rate Incurred TRP Revolver 1.9% - 6.0% 2.5% Securitization Facility 1.5% - 2.7% 2.1%
Summary of Debt Repurchased a Portion of Outstanding Senior Notes on Open Market	During the six months ended June 30, 2020, we repurchased a portion of our outstanding senior notes on the open market as follows: Debt Repurchased Book Value Payment Gain Write-off of Debt Issuance Costs Net Gain 5⅛% Senior Notes due 2025 $ 19.0 $ (14.6 ) $ 4.4 $ (0.1 ) $ 4.3 5⅞% Senior Notes due 2026 36.8 (29.7 ) 7.1 (0.2 ) 6.9 5⅜% Senior Notes due 2027 31.9 (26.6 ) 5.3 (0.2 ) 5.1 6½% Senior Notes due 2027 44.8 (35.5 ) 9.3 (0.4 ) 8.9 5% Senior Notes due 2028 49.7 (38.0 ) 11.7 (0.4 ) 11.3 6⅞% Senior Notes due 2029 70.7 (55.2 ) 15.5 (0.6 ) 14.9 5½% Senior Notes due 2030 50.4 (40.2 ) 10.2 (0.5 ) 9.7 $ 303.3 $ (239.8 ) $ 63.5 $ (2.4 ) $ 61.1
Summary of Payment Obligations for Debt Instruments	The following table summarizes payment obligations for debt instruments after giving effect to the debt repurchases detailed above: Payments Due By Period Less Than More Than Total 1 Year 1-3 Years 3-5 Years 5 Years (in millions) Long-term debt obligations (1) $ 7,164.9 $ - $ 1,006.1 $ 1,693.1 $ 4,465.7 Interest on debt obligations (2) 2,475.0 397.8 792.6 600.7 683.9 $ 9,639.9 $ 397.8 $ 1,798.7 $ 2,293.8 $ 5,149.6 ____________________________________________________________________________________________ (1) Represents scheduled future maturities of consolidated debt obligations for the periods indicated. (2) Represents interest expense on debt obligations based on both fixed debt interest rates and prevailing June 30, 2020 rates for floating debt.

Partnership Units and Related_2

Partnership Units and Related Matters (Tables)	6 Months Ended
	Jun. 30, 2020
Partners Capital [Abstract]
Schedule of Distributions	The following table details the distributions declared and paid by us for the six months ended June 30, 2020: Three Months Ended Date Paid or To Be Paid Total Distributions Distributions to Targa Resources Corp. June 30, 2020 August 13, 2020 $ 51.7 $ 48.9 March 31, 2020 May 13, 2020 53.1 50.3 December 31, 2019 February 13, 2020 241.9 239.1

Derivative Instruments and He_2

Derivative Instruments and Hedging Activities (Tables)	6 Months Ended
	Jun. 30, 2020
Derivative Instruments And Hedging Activities Disclosure [Abstract]
Notional Volume of Commodity Hedges	At June 30, 2020, the notional volumes of our commodity derivative contracts were: Commodity Instrument Unit 2020 2021 2022 2023 2024 2025 Natural Gas Swaps MMBtu/d 167,230 166,216 86,100 20,000 - - Natural Gas Basis Swaps MMBtu/d 416,374 450,566 295,390 250,000 90,000 5,000 NGL Swaps Bbl/d 30,814 23,729 12,371 - - - NGL Futures Bbl/d 39,370 12,288 - - - - Condensate Swaps Bbl/d 5,190 5,864 1,610 - - -
Fair Values of Derivative Instruments	The following schedules reflect the fair value of our derivative instruments and their location on 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 June 30, 2020 Fair Value as of December 31, 2019 Balance Sheet Derivative Derivative Derivative Derivative Location Assets Liabilities Assets Liabilities Derivatives designated as hedging instruments Commodity contracts Current $ 99.2 $ 74.6 $ 102.1 $ 11.6 Long-term 36.1 32.6 33.7 6.4 Total derivatives designated as hedging instruments $ 135.3 $ 107.2 $ 135.8 $ 18.0 Derivatives not designated as hedging instruments Commodity contracts Current $ 22.8 $ 5.9 $ 1.2 $ 92.5 Long-term 7.2 20.3 1.8 34.4 Total derivatives not designated as hedging instruments $ 30.0 $ 26.2 $ 3.0 $ 126.9 Total current position $ 122.0 $ 80.5 $ 103.3 $ 104.1 Total long-term position 43.3 52.9 35.5 40.8 Total derivatives $ 165.3 $ 133.4 $ 138.8 $ 144.9
Pro Forma Impact of Derivatives Net in Consolidated Balance Sheet	The pro forma impact of reporting derivatives on our Consolidated Balance Sheets on a net basis is as follows: Gross Presentation Pro Forma Net Presentation June 30, 2020 Asset Liability Collateral Asset Liability Current Position Counterparties with offsetting positions or collateral $ 108.9 $ (80.5 ) $ 48.2 $ 76.6 $ - Counterparties without offsetting positions - assets 13.1 - - 13.1 - Counterparties without offsetting positions - liabilities - - - - - 122.0 (80.5 ) 48.2 89.7 - Long Term Position Counterparties with offsetting positions or collateral 31.5 (49.3 ) - 6.6 (24.4 ) Counterparties without offsetting positions - assets 11.8 - - 11.8 - Counterparties without offsetting positions - liabilities - (3.6 ) - - (3.6 ) 43.3 (52.9 ) - 18.4 (28.0 ) Total Derivatives Counterparties with offsetting positions or collateral 140.4 (129.8 ) 48.2 83.2 (24.4 ) Counterparties without offsetting positions - assets 24.9 - - 24.9 - Counterparties without offsetting positions - liabilities - (3.6 ) - - (3.6 ) $ 165.3 $ (133.4 ) $ 48.2 $ 108.1 $ (28.0 ) Gross Presentation Pro Forma Net Presentation December 31, 2019 Asset Liability Collateral Asset Liability Current Position Counterparties with offsetting positions or collateral $ 99.8 $ (85.0 ) $ (4.9 ) $ 56.0 $ (46.1 ) Counterparties without offsetting positions - assets 3.5 - - 3.5 - Counterparties without offsetting positions - liabilities - (19.1 ) - - (19.1 ) 103.3 (104.1 ) (4.9 ) 59.5 (65.2 ) Long Term Position Counterparties with offsetting positions or collateral 33.3 (40.5 ) - 18.1 (25.3 ) Counterparties without offsetting positions - assets 2.2 - - 2.2 - Counterparties without offsetting positions - liabilities - (0.3 ) - - (0.3 ) 35.5 (40.8 ) - 20.3 (25.6 ) Total Derivatives Counterparties with offsetting positions or collateral 133.1 (125.5 ) (4.9 ) 74.1 (71.4 ) Counterparties without offsetting positions - assets 5.7 - - 5.7 - Counterparties without offsetting positions - liabilities - (19.4 ) - - (19.4 ) $ 138.8 $ (144.9 ) $ (4.9 ) $ 79.8 $ (90.8 )
Amounts Recorded in Other Comprehensive Income (OCI) and Amounts Reclassified from OCI to Revenue	The following tables reflect amounts recorded in Other comprehensive income (“OCI”) and amounts reclassified from OCI to revenue for the periods indicated: Gain (Loss) Recognized in OCI on Derivatives (Effective Portion) Derivatives in Cash Flow Three Months Ended June 30, Six Months Ended June 30, Hedging Relationships 2020 2019 2020 2019 Commodity contracts $ (132.9 ) $ 88.4 $ 26.2 $ 49.6 Gain (Loss) Reclassified from OCI into Income (Effective Portion) Three Months Ended June 30, Six Months Ended June 30, Location of Gain (Loss) 2020 2019 2020 2019 Revenues $ 60.2 $ 43.3 $ 120.3 $ 64.6
Gain (Loss) Recognized in Income on Derivatives	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. For the three and six months ended June 30, 2020, the unrealized mark-to-market gains are primarily attributable to favorable movements in natural gas forward basis prices, as compared to our hedged positions. Location of Gain Gain (Loss) Recognized in Income on Derivatives Derivatives Not Designated Recognized in Income on Three Months Ended June 30, Six Months Ended June 30, as Hedging Instruments Derivatives 2020 2019 2020 2019 Commodity contracts Revenue $ 8.1 $ (1.1 ) $ 107.8 $ (10.5 )

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	6 Months Ended
	Jun. 30, 2020
Fair Value Disclosures [Abstract]
Breakdown by Fair Value Hierarchy Category for Financial Instruments Included on Consolidated Balance Sheets	The following table shows a breakdown by fair value hierarchy category for (1) financial instruments measurements included on our Consolidated Balance Sheets at fair value and (2) supplemental fair value disclosures for other financial instruments: June 30, 2020 Fair Value Carrying Value Total Level 1 Level 2 Level 3 Financial Instruments Recorded on Our Consolidated Balance Sheets at Fair Value: Assets from commodity derivative contracts (1) $ 164.0 $ 164.0 $ — $ 164.0 $ — Liabilities from commodity derivative contracts (1) 132.1 132.1 — 132.1 — TPL contingent consideration (2) 2.3 2.3 — — 2.3 Financial Instruments Recorded on Our Consolidated Balance Sheets at Carrying Value: Cash and cash equivalents 173.6 173.6 — — — TRP Revolver 440.0 440.0 — 440.0 — Senior unsecured notes 6,725.1 6,627.2 — 6,627.2 — Securitization Facility 250.0 250.0 — 250.0 — December 31, 2019 Fair Value Carrying Value Total Level 1 Level 2 Level 3 Financial Instruments Recorded on Our Consolidated Balance Sheets at Fair Value: Assets from commodity derivative contracts (1) $ 136.5 $ 136.5 $ — $ 136.2 $ 0.3 Liabilities from commodity derivative contracts (1) 142.6 142.6 — 142.0 0.6 TPL contingent consideration (2) 2.3 2.3 — — 2.3 Financial Instruments Recorded on Our Consolidated Balance Sheets at Carrying Value: Cash and cash equivalents 291.1 291.1 — — — TRP Revolver — — — — — Senior unsecured notes 7,028.5 7,376.9 — 7,376.9 — Securitization Facility 370.0 370.0 — 370.0 — (1) The fair value of derivative contracts in this table is presented on a different basis than the Consolidated Balance Sheets presentation as disclosed in Note 8– Derivative Instruments and Hedging Activities. The above fair values reflect the total value of each derivative contract taken as a whole, whereas the Consolidated Balance Sheets presentation is based on the individual maturity dates of estimated future settlements. As such, an individual contract could have both an asset and liability position when segregated into its current and long-term portions for Consolidated Balance Sheets classification purposes. (2) We have a contingent consideration liability for TPL’s previous acquisition of a gas gathering system and related assets, which is carried at fair value.
Reconciliation of Changes in Fair Value of Financial Instruments Classified as Level 3	The following table summarizes the changes in fair value of our financial instruments classified as Level 3 in the fair value hierarchy: Commodity Derivative Contracts Contingent Asset/(Liability) Consideration Balance, December 31, 2019 $ (0.3 ) $ (2.3 ) Transfers out of Level 3 (1) 0.3 — Balance, June 30, 2020 $ — $ (2.3 ) (1) Transfers relate to long-term over-the-counter swaps for NGL products for which observable market prices became available for substantially their full term.

Related Party Transactions - _2

Related Party Transactions - Targa (Tables)	6 Months Ended
	Jun. 30, 2020
Related Party Transactions [Abstract]
Summary of Transactions with Affiliates	The following table summarizes transactions with Targa: Three Months Ended June 30, Six Months Ended June 30, 2020 2019 2020 2019 Targa billings of payroll and related costs included in operating expenses $ 66.6 $ 61.6 $ 132.2 $ 115.7 Targa allocation of general and administrative expense 56.0 61.1 108.5 128.8 Cash distributions to Targa based on general partner and limited partner ownership 50.3 435.0 289.4 673.5 Cash contributions from Targa related to limited partner ownership (1) 49.0 186.2 49.0 186.2 Cash contributions from Targa to maintain its 2% general partner ownership 1.0 3.8 1.0 3.8 ____________________________________________________________________________________________________________ (1) The cash contributions from Targa related to limited partner ownership were allocated 98% to the limited partner and 2% to general partner. See Note 7 – Partnership Units and Related Matters.

Revenue (Tables)

Revenue (Tables)	6 Months Ended
	Jun. 30, 2020
Revenue From Contract With Customer [Abstract]
Summary of Estimated Minimum Revenue Expected to be Recognized in Future Related to Unsatisfied Performance Obligations	The following table includes the estimated minimum revenue expected to be recognized in the future related to performance obligations that are unsatisfied (or partially unsatisfied) at the end of the reporting period and is comprised of fixed consideration primarily attributable to contracts with minimum volume commitments and for which a guaranteed amount of revenue can be calculated . These contracts are comprised primarily of gathering and processing, fractionation, export, terminaling and storage agreements. 2020 2021 2022 and after Fixed consideration to be recognized as of June 30, 2020 $ 270.6 $ 515.0 $ 3,202.7

Supplemental Cash Flow Inform_2

Supplemental Cash Flow Information (Tables)	6 Months Ended
	Jun. 30, 2020
Supplemental Cash Flow Elements [Abstract]
Supplemental Cash Flow Information	Six Months Ended June 30, 2020 2019 Cash: Interest paid, net of capitalized interest (1) $ 165.3 $ 106.2 Income taxes paid, net of refunds 0.1 (1.7 ) Non-cash investing activities: Impact of capital expenditure accruals on property, plant and equipment, net (143.9 ) (4.3 ) Transfers from materials and supplies inventory to property, plant and equipment 1.8 16.4 Non-cash financing activities: Changes in accrued distributions to noncontrolling interests $ (1.9 ) $ 49.6 __________________ (1) Interest capitalized on major projects was $22.5 million and $36.1 million for the six months ended June 30, 2020 and 2019.

Segment Information (Tables)

Segment Information (Tables)	6 Months Ended
	Jun. 30, 2020
Segment Reporting [Abstract]
Information by Segment	Reportable segment information is shown in the following tables: Three Months Ended June 30, 2020 Gathering and Processing Logistics and Transportation Other Corporate and Eliminations Total Revenues Sales of commodities $ 133.5 $ 1,136.3 $ 10.8 $ — $ 1,280.6 Fees from midstream services 110.0 132.9 — — 242.9 243.5 1,269.2 10.8 — 1,523.5 Intersegment revenues Sales of commodities 389.2 46.1 — (435.3 ) — Fees from midstream services 1.5 7.3 — (8.8 ) — 390.7 53.4 — (444.1 ) — Revenues $ 634.2 $ 1,322.6 $ 10.8 $ (444.1 ) $ 1,523.5 Operating margin $ 237.2 $ 231.5 $ 10.8 $ — $ 479.5 Other financial information: Total assets (1) $ 9,124.2 $ 6,697.2 $ 22.0 $ 72.9 $ 15,916.3 Goodwill $ 45.2 $ — $ — $ — $ 45.2 Capital expenditures $ 37.1 $ 127.9 $ — $ 4.6 $ 169.6 (1) Assets in the Corporate and Eliminations column primarily include cash, prepaids and debt issuance costs for our TRP Revolver. Three Months Ended June 30, 2019 Gathering and Processing Logistics and Transportation Other Corporate and Eliminations Total Revenues Sales of commodities $ 298.4 $ 1,378.8 $ 7.0 $ — $ 1,684.2 Fees from midstream services 176.2 134.9 — — 311.1 474.6 1,513.7 7.0 — 1,995.3 Intersegment revenues Sales of commodities 539.7 43.6 — (583.3 ) — Fees from midstream services 1.5 7.0 — (8.5 ) — 541.2 50.6 — (591.8 ) — Revenues $ 1,015.8 $ 1,564.3 $ 7.0 $ (591.8 ) $ 1,995.3 Operating margin $ 232.1 $ 184.4 $ 7.0 $ — $ 423.5 Other financial information: Total assets (1) $ 12,144.4 $ 5,994.7 $ 19.0 $ 94.6 $ 18,252.7 Goodwill $ 46.6 $ — $ — $ — $ 46.6 Capital expenditures $ 420.8 $ 425.5 $ — $ 10.8 $ 857.1 (1) Assets in the Corporate and Eliminations column primarily include cash, prepaids and debt issuance costs for our TRP Revolver. Six Months Ended June 30, 2020 Gathering and Processing Logistics and Transportation Other Corporate and Eliminations Total Revenues Sales of commodities $ 377.3 $ 2,555.7 $ 127.2 $ — $ 3,060.2 Fees from midstream services 228.2 284.0 — — 512.2 605.5 2,839.7 127.2 — 3,572.4 Intersegment revenues Sales of commodities 832.4 102.7 — (935.1 ) — Fees from midstream services 3.3 15.4 — (18.7 ) — 835.7 118.1 — (953.8 ) — Revenues $ 1,441.2 $ 2,957.8 $ 127.2 $ (953.8 ) $ 3,572.4 Operating margin $ 492.8 $ 525.5 $ 127.2 $ — $ 1,145.5 Other financial information: Total assets (1) $ 9,124.2 $ 6,697.2 $ 22.0 $ 72.9 $ 15,916.3 Goodwill $ 45.2 $ — $ — $ — $ 45.2 Capital expenditures $ 154.6 $ 306.3 $ — $ 12.9 $ 473.8 (1) Assets in the Corporate and Eliminations column primarily include cash, prepaids and debt issuance costs for our TRP Revolver. Six Months Ended June 30, 2019 Gathering and Processing Logistics and Transportation Other Corporate and Eliminations Total Revenues Sales of commodities $ 555.1 $ 3,105.6 $ — $ — $ 3,660.7 Fees from midstream services 376.1 257.9 — — 634.0 931.2 3,363.5 — — 4,294.7 Intersegment revenues Sales of commodities 1,362.5 82.1 — (1,444.6 ) — Fees from midstream services 3.3 12.5 — (15.8 ) — 1,365.8 94.6 — (1,460.4 ) — Revenues $ 2,297.0 $ 3,458.1 $ — $ (1,460.4 ) $ 4,294.7 Operating margin $ 470.3 $ 336.3 $ — $ — $ 806.6 Other financial information: Total assets (1) $ 12,144.4 $ 5,994.7 $ 19.0 $ 94.6 $ 18,252.7 Goodwill $ 46.6 $ — $ — $ — $ 46.6 Capital expenditures $ 838.5 $ 896.3 $ — $ 27.8 $ 1,762.6 (1) Assets in the Corporate and Eliminations column primarily include cash, prepaids and debt issuance costs for our TRP Revolver.
Revenues Disaggregated by Product and Service	The following table shows our consolidated revenues disaggregated by product and service for the periods presented: Three Months Ended June 30, Six Months Ended June 30, 2020 2019 2020 2019 Sales of commodities: Revenue recognized from contracts with customers: Natural gas $ 269.7 $ 217.6 $ 542.8 $ 628.9 NGL 908.2 1,195.5 2,069.5 2,591.9 Condensate and crude oil 27.6 172.1 163.3 309.8 Petroleum products 6.8 56.8 56.5 76.0 1,212.3 1,642.0 2,832.1 3,606.6 Non-customer revenue: Derivative activities - Hedge 60.2 43.3 120.3 64.6 Derivative activities - Non-hedge (1) 8.1 (1.1 ) 107.8 (10.5 ) 68.3 42.2 228.1 54.1 Total sales of commodities 1,280.6 1,684.2 3,060.2 3,660.7 Fees from midstream services: Revenue recognized from contracts with customers: Gathering and processing 107.4 177.5 223.3 371.9 NGL transportation, fractionation and services 32.9 40.1 72.8 76.3 Storage, terminaling and export 89.1 90.4 188.8 170.0 Other 13.5 3.1 27.3 15.8 Total fees from midstream services 242.9 311.1 512.2 634.0 Total revenues $ 1,523.5 $ 1,995.3 $ 3,572.4 $ 4,294.7 (1) Represents derivative activities that are not designated as hedging instruments under ASC 815.
Reconciliation of Reportable Segment Operating Margin to Income (Loss) Before Income Taxes	The following table shows a reconciliation of reportable segment operating margin to income (loss) before income taxes for the periods presented: Three Months Ended June 30, Six Months Ended June 30, 2020 2019 2020 2019 Reconciliation of reportable segment operating margin to income (loss) before income taxes: Gathering and Processing operating margin $ 237.2 $ 232.1 $ 492.8 $ 470.3 Logistics and Transportation operating margin 231.5 184.4 525.5 336.3 Other operating margin 10.8 7.0 127.2 — Depreciation and amortization expense (204.5 ) (237.2 ) (443.6 ) (474.6 ) General and administrative expense (58.6 ) (69.3 ) (115.5 ) (146.7 ) Impairment of long-lived assets — — (2,442.8 ) — Interest expense, net (94.3 ) (69.5 ) (188.1 ) (144.9 ) Equity earnings (loss) 14.9 3.2 35.5 5.9 Gain (loss) on sale or disposition of business and assets 0.7 0.2 - (3.1 ) Gain (loss) from financing activities 21.8 — 61.1 (1.4 ) Change in contingent considerations — 0.8 — (8.9 ) Other, net (0.3 ) — (0.8 ) (0.2 ) Income (loss) before income taxes $ 159.2 $ 51.7 $ (1,948.7 ) $ 32.7

Organization and Operations (De

Organization and Operations (Details) - Series A Cumulative Redeemable Perpetual Preferred Units [Member] - shares	1 Months Ended	6 Months Ended
	Oct. 31, 2015	Jun. 30, 2020	Dec. 31, 2019
Subsidiary Of Limited Liability Company Or Limited Partnership [Line Items]
Preferred units, outstanding		5,000,000	5,000,000
Preferred units dividend percentage	9.00%	9.00%

Property, Plant and Equipment_3

Property, Plant and Equipment and Intangible Assets - Property, Plant and Equipment (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2020	Dec. 31, 2019
Property Plant And Equipment [Line Items]
Property, plant and equipment	$ 20,309.6	$ 19,870.6
Accumulated depreciation, amortization and impairment	(7,892.1)	(5,321.6)
Property, plant and equipment, net	12,417.5	14,549
Intangible assets	2,643.5	2,643.5
Accumulated amortization and impairment	(1,190.7)	(908.5)
Intangible assets, net	$ 1,452.8	1,735
Minimum [Member]
Property Plant And Equipment [Line Items]
Estimated useful life	10 years
Maximum [Member]
Property Plant And Equipment [Line Items]
Estimated useful life	20 years
Gathering Systems [Member]
Property Plant And Equipment [Line Items]
Property, plant and equipment	$ 9,117.8	8,976.8
Gathering Systems [Member] | Minimum [Member]
Property Plant And Equipment [Line Items]
Estimated useful life	5 years
Gathering Systems [Member] | Maximum [Member]
Property Plant And Equipment [Line Items]
Estimated useful life	20 years
Processing and Fractionation Facilities [Member]
Property Plant And Equipment [Line Items]
Property, plant and equipment	$ 5,666.2	5,137
Processing and Fractionation Facilities [Member] | Minimum [Member]
Property Plant And Equipment [Line Items]
Estimated useful life	5 years
Processing and Fractionation Facilities [Member] | Maximum [Member]
Property Plant And Equipment [Line Items]
Estimated useful life	25 years
Terminaling and Storage Facilities [Member]
Property Plant And Equipment [Line Items]
Property, plant and equipment	$ 1,498.7	1,495.5
Terminaling and Storage Facilities [Member] | Minimum [Member]
Property Plant And Equipment [Line Items]
Estimated useful life	5 years
Terminaling and Storage Facilities [Member] | Maximum [Member]
Property Plant And Equipment [Line Items]
Estimated useful life	25 years
Transportation Assets [Member]
Property Plant And Equipment [Line Items]
Property, plant and equipment	$ 2,316.3	2,292.4
Transportation Assets [Member] | Minimum [Member]
Property Plant And Equipment [Line Items]
Estimated useful life	10 years
Transportation Assets [Member] | Maximum [Member]
Property Plant And Equipment [Line Items]
Estimated useful life	50 years
Other Property, Plant and Equipment [Member]
Property Plant And Equipment [Line Items]
Property, plant and equipment	$ 196.2	183.9
Other Property, Plant and Equipment [Member] | Minimum [Member]
Property Plant And Equipment [Line Items]
Estimated useful life	3 years
Other Property, Plant and Equipment [Member] | Maximum [Member]
Property Plant And Equipment [Line Items]
Estimated useful life	25 years
Land [Member]
Property Plant And Equipment [Line Items]
Property, plant and equipment	$ 159.2	159.7
Construction in Progress [Member]
Property Plant And Equipment [Line Items]
Property, plant and equipment	1,304.2	1,576.5
Finance Lease Right-of-Use Assets [Member]
Property Plant And Equipment [Line Items]
Property, plant and equipment	$ 51	$ 48.8

Property, Plant and Equipment_4

Property, Plant and Equipment and Intangible Assets - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended				6 Months Ended
	Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2020	Jun. 30, 2019
Property Plant And Equipment [Line Items]
Depreciation expense	$ 169.3		$ 194.3		$ 370	$ 388.7
Weighted average discount rate percentage		14.00%
Non-cash pre-tax impairments	$ 0	$ 2,442.8	$ 0		$ 2,442.8	$ 0
Restatement Adjustment [Member]
Property Plant And Equipment [Line Items]
Depreciation expense				$ 12.5

Property, Plant and Equipment_5

Property, Plant and Equipment and Intangible Assets - Intangible Assets (Details) $ in Millions	Jun. 30, 2020USD ($)
Estimated amortization expense for intangible assets [Abstract]
2020	$ 144
2021	130.9
2022	122.7
2023	117.5
2024	$ 113.7

Property, Plant and Equipment_6

Property, Plant and Equipment and Intangible Assets - Schedule of Changes in Intangible Assets (Details) $ in Millions	6 Months Ended
	Jun. 30, 2020USD ($)
Intangible Assets, net [Roll Forward]
Balance at December 31, 2019	$ 1,735
Impairment	(208.6)
Amortization	(73.6)
Balance at June 30, 2020	$ 1,452.8

Debt Obligations (Details)

Debt Obligations (Details) - USD ($) $ in Millions		Jun. 30, 2020	Dec. 31, 2019
Current:
Accounts receivable securitization facility, due April 2021	[1]	$ 250	$ 370
Finance lease liabilities		11.9	12.2
Current debt obligations		261.9	382.2
Long-term [Abstract]
Long-term debt including unamortized premium (discount)		7,165.1	7,028.5
Debt issuance costs, net of amortization		(43.7)	(49.1)
Finance lease liabilities		23.2	25.8
Long-term debt		7,144.6	7,005.2
Total debt obligations		7,406.5	7,387.4
Irrevocable standby letters of credit outstanding	[2]	56.8	88.2
Senior Unsecured Notes [Member] | Senior Unsecured 5 1/4% Notes due May 2023 [Member]
Long-term [Abstract]
Long-term debt		559.6	559.6
Senior Unsecured Notes [Member] | Senior Unsecured 4 1/4% Notes due November 2023 [Member]
Long-term [Abstract]
Long-term debt		583.9	583.9
Senior Unsecured Notes [Member] | Senior Unsecured 6 3/4% Notes due March 2024 [Member]
Long-term [Abstract]
Long-term debt		580.1	580.1
Senior Unsecured Notes [Member] | Senior Unsecured 5 1/8% Notes due February 2025 [Member]
Long-term [Abstract]
Long-term debt		481	500
Senior Unsecured Notes [Member] | Senior Unsecured 5⅞% Notes due April 2026 [Member]
Long-term [Abstract]
Long-term debt		963.2	1,000
Senior Unsecured Notes [Member] | Senior Unsecured 5 3/8% Notes due February 2027 [Member]
Long-term [Abstract]
Long-term debt		468.1	500
Senior Unsecured Notes [Member] | Senior Unsecured 6 1/2% Notes due July 2027 [Member]
Long-term [Abstract]
Long-term debt		705.2	750
Senior Unsecured Notes [Member] | Senior Unsecured 5% Notes due January 2028 [Member]
Long-term [Abstract]
Long-term debt		700.3	750
Senior Unsecured Notes [Member] | Senior Unsecured 6 7/8% Notes due January 2029 [Member]
Long-term [Abstract]
Long-term debt		679.3	750
Senior Unsecured Notes [Member] | Senior Unsecured 5 1/2 % Notes due March 2030 [Member]
Long-term [Abstract]
Long-term debt		949.6	1,000
Senior Unsecured Notes [Member] | Targa Pipeline Partners LP [Member] | Senior Unsecured 4 3/4% Notes due November 2021 [Member]
Long-term [Abstract]
Long-term debt	[3]	6.5	6.5
Senior Unsecured Notes [Member] | Targa Pipeline Partners LP [Member] | Senior Unsecured 5 7/8% Notes due August 2023 [Member]
Long-term [Abstract]
Long-term debt	[3]	48.1	48.1
Unamortized premium		0.2	$ 0.3
Revolving Credit Facility [Member] | Senior Secured Revolving Credit Facility, Variable Rate, due June 2023 [Member]
Long-term [Abstract]
Long-term debt	[2]	$ 440
[1]	As of June 30, 2020, we had $250.0 million of qualifying receivables under our $250.0 million accounts receivable securitization facility (“Securitization Facility”), resulting in zero availability. During the second quarter of 2020, we amended the Securitization Facility to decrease the facility size from $400.0 million to $250.0 million to more closely align with our expectations for borrowing needs given commodity prices and to extend the facility termination date to April 21, 2021.
[2]	As of June 30, 2020, availability under our $2.2 billion senior secured revolving credit facility (“TRP Revolver”) was $1,703.2 million.
[3]	“TPL” refers to Targa Pipeline Partners LP.

Debt Obligations (Parenthetical

Debt Obligations (Parenthetical) (Details) - USD ($)		6 Months Ended
		Jun. 30, 2020	Jun. 30, 2019	May 31, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Proceeds from borrowings under accounts receivable securitization facility		$ 226,400,000	$ 742,900,000
Accounts receivable securitization facility, due April 2021	[1]	$ 250,000,000			$ 370,000,000
Revolving Credit Facility [Member] | Senior Secured Revolving Credit Facility, Variable Rate, due June 2023 [Member]
Debt Instrument [Line Items]
Maturity date	[2]	Jun. 30, 2023
Maximum borrowing capacity		$ 2,200,000,000
Remaining borrowing capacity		$ 1,703,200,000
Securitization Facility [Member] | Securitization Facility Due April 2021 [Member]
Debt Instrument [Line Items]
Maturity date	[1]	Apr. 30, 2021
Accounts Receivable Securitization Facility [Member]
Debt Instrument [Line Items]
Maturity date		Apr. 21, 2021
Proceeds from borrowings under accounts receivable securitization facility		$ 250,000,000
Accounts receivable securitization facility, due April 2021		250,000,000
Availability amount under accounts receivable securitization		0
Maximum borrowing capacity		$ 250,000,000		$ 400,000,000
Senior Unsecured Notes [Member] | Senior Unsecured 5 1/4% Notes due May 2023 [Member]
Debt Instrument [Line Items]
Maturity date		May 31, 2023
Interest rate on fixed rate debt		5.25%
Senior Unsecured Notes [Member] | Senior Unsecured 4 1/4% Notes due November 2023 [Member]
Debt Instrument [Line Items]
Maturity date		Nov. 30, 2023
Interest rate on fixed rate debt		4.25%
Senior Unsecured Notes [Member] | Senior Unsecured 6 3/4% Notes due March 2024 [Member]
Debt Instrument [Line Items]
Maturity date		Mar. 31, 2024
Interest rate on fixed rate debt		6.75%
Senior Unsecured Notes [Member] | Senior Unsecured 5 1/8% Notes due February 2025 [Member]
Debt Instrument [Line Items]
Maturity date		Feb. 28, 2025
Interest rate on fixed rate debt		5.125%
Senior Unsecured Notes [Member] | Senior Unsecured 6 1/2% Notes due July 2027 [Member]
Debt Instrument [Line Items]
Maturity date		Jul. 31, 2027
Interest rate on fixed rate debt		6.50%
Senior Unsecured Notes [Member] | Senior Unsecured 5⅞% Notes due April 2026 [Member]
Debt Instrument [Line Items]
Maturity date		Apr. 30, 2026
Interest rate on fixed rate debt		5.875%
Senior Unsecured Notes [Member] | Senior Unsecured 5 3/8% Notes due February 2027 [Member]
Debt Instrument [Line Items]
Maturity date		Feb. 28, 2027
Interest rate on fixed rate debt		5.375%
Senior Unsecured Notes [Member] | Senior Unsecured 5% Notes due January 2028 [Member]
Debt Instrument [Line Items]
Maturity date		Jan. 31, 2028
Interest rate on fixed rate debt		5.00%
Senior Unsecured Notes [Member] | Senior Unsecured 6 7/8% Notes due January 2029 [Member]
Debt Instrument [Line Items]
Maturity date		Jan. 31, 2029
Interest rate on fixed rate debt		6.875%
Senior Unsecured Notes [Member] | Senior Unsecured 5 1/2 % Notes due March 2030 [Member]
Debt Instrument [Line Items]
Maturity date		Mar. 31, 2030
Interest rate on fixed rate debt		5.50%
Senior Unsecured Notes [Member] | Targa Pipeline Partners LP [Member] | Senior Unsecured 4 3/4% Notes due November 2021 [Member]
Debt Instrument [Line Items]
Maturity date	[3]	Nov. 30, 2021
Interest rate on fixed rate debt		4.75%
Senior Unsecured Notes [Member] | Targa Pipeline Partners LP [Member] | Senior Unsecured 5 7/8% Notes due August 2023 [Member]
Debt Instrument [Line Items]
Maturity date	[3]	Aug. 31, 2023
Interest rate on fixed rate debt		5.875%
[1]	As of June 30, 2020, we had $250.0 million of qualifying receivables under our $250.0 million accounts receivable securitization facility (“Securitization Facility”), resulting in zero availability. During the second quarter of 2020, we amended the Securitization Facility to decrease the facility size from $400.0 million to $250.0 million to more closely align with our expectations for borrowing needs given commodity prices and to extend the facility termination date to April 21, 2021.
[2]	As of June 30, 2020, availability under our $2.2 billion senior secured revolving credit facility (“TRP Revolver”) was $1,703.2 million.
[3]	“TPL” refers to Targa Pipeline Partners LP.

Debt Obligations - Interest Rat

Debt Obligations - Interest Rates on Variable-Rate Debt Obligations (Details)	Jun. 30, 2020
Targa Resources Partners LP [Member] | Securitization Facility [Member]
Range of interest rates and weighted average interest rate [Abstract]
Weighted average interest rate incurred	2.10%
Minimum [Member] | Targa Resources Partners LP [Member] | Securitization Facility [Member]
Range of interest rates and weighted average interest rate [Abstract]
Range of interest rates incurred	1.50%
Maximum [Member] | Targa Resources Partners LP [Member] | Securitization Facility [Member]
Range of interest rates and weighted average interest rate [Abstract]
Range of interest rates incurred	2.70%
TRP Revolver [Member]
Range of interest rates and weighted average interest rate [Abstract]
Weighted average interest rate incurred	2.50%
TRP Revolver [Member] | Minimum [Member]
Range of interest rates and weighted average interest rate [Abstract]
Range of interest rates incurred	1.90%
TRP Revolver [Member] | Maximum [Member]
Range of interest rates and weighted average interest rate [Abstract]
Range of interest rates incurred	6.00%

Debt Obligations - Summary of D

Debt Obligations - Summary of Debt Repurchased a Portion of Outstanding Senior Notes on Open Market (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Debt Instrument [Line Items]
Debt Repurchased, Book Value	$ 303.3		$ 303.3
Debt Repurchased, Payment	(239.8)		(239.8)
Debt Repurchased, Gain			63.5
Debt Repurchased, Write-off of Debt Issuance Costs			(2.4)
Debt Repurchased, Net Gain	21.8	$ 0	61.1	$ (1.4)
5⅛% Senior Notes due 2025 [Member]
Debt Instrument [Line Items]
Debt Repurchased, Book Value	19		19
Debt Repurchased, Payment	(14.6)		(14.6)
Debt Repurchased, Gain			4.4
Debt Repurchased, Write-off of Debt Issuance Costs			(0.1)
Debt Repurchased, Net Gain			4.3
5⅞% Senior Notes due 2026 [Member]
Debt Instrument [Line Items]
Debt Repurchased, Book Value	36.8		36.8
Debt Repurchased, Payment	(29.7)		(29.7)
Debt Repurchased, Gain			7.1
Debt Repurchased, Write-off of Debt Issuance Costs			(0.2)
Debt Repurchased, Net Gain			6.9
5⅜% Senior Notes due 2027 [Member]
Debt Instrument [Line Items]
Debt Repurchased, Book Value	31.9		31.9
Debt Repurchased, Payment	(26.6)		(26.6)
Debt Repurchased, Gain			5.3
Debt Repurchased, Write-off of Debt Issuance Costs			(0.2)
Debt Repurchased, Net Gain			5.1
6½% Senior Notes due 2027 [Member]
Debt Instrument [Line Items]
Debt Repurchased, Book Value	44.8		44.8
Debt Repurchased, Payment	(35.5)		(35.5)
Debt Repurchased, Gain			9.3
Debt Repurchased, Write-off of Debt Issuance Costs			(0.4)
Debt Repurchased, Net Gain			8.9
5% Senior Notes due 2028 [Member]
Debt Instrument [Line Items]
Debt Repurchased, Book Value	49.7		49.7
Debt Repurchased, Payment	(38)		(38)
Debt Repurchased, Gain			11.7
Debt Repurchased, Write-off of Debt Issuance Costs			(0.4)
Debt Repurchased, Net Gain			11.3
6⅞% Senior Notes due 2029 [Member]
Debt Instrument [Line Items]
Debt Repurchased, Book Value	70.7		70.7
Debt Repurchased, Payment	(55.2)		(55.2)
Debt Repurchased, Gain			15.5
Debt Repurchased, Write-off of Debt Issuance Costs			(0.6)
Debt Repurchased, Net Gain			14.9
5½% Senior Notes due 2030 [Member]
Debt Instrument [Line Items]
Debt Repurchased, Book Value	50.4		50.4
Debt Repurchased, Payment	$ (40.2)		(40.2)
Debt Repurchased, Gain			10.2
Debt Repurchased, Write-off of Debt Issuance Costs			(0.5)
Debt Repurchased, Net Gain			$ 9.7

Debt Obligations - Summary of P

Debt Obligations - Summary of Payment Obligations for Debt Instruments (Details) $ in Millions	Jun. 30, 2020USD ($)
Debt Instrument [Line Items]
Total	$ 9,639.9
Less Than 1 Year	397.8
1-3 Years	1,798.7
3-5 Years	2,293.8
More Than 5 Years	5,149.6
Long-Term Debt Obligations [Member]
Debt Instrument [Line Items]
Total	7,164.9	[1]
1-3 Years	1,006.1	[1]
3-5 Years	1,693.1	[1]
More Than 5 Years	4,465.7	[1]
Interest on Debt Obligations [Member]
Debt Instrument [Line Items]
Total	2,475	[2]
Less Than 1 Year	397.8	[2]
1-3 Years	792.6	[2]
3-5 Years	600.7	[2]
More Than 5 Years	$ 683.9	[2]
[1]	Represents scheduled future maturities of consolidated debt obligations for the periods indicated.
[2]	Represents interest expense on debt obligations based on both fixed debt interest rates and prevailing June 30, 2020 rates for floating debt.

Other Long-term Liabilities - A

Other Long-term Liabilities - Additional Information (Details) - USD ($) $ in Millions	Jun. 30, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Deferred Revenue [Abstract]
Deferred revenue	$ 170.3	$ 172
Channelview Splitter [Member] | Noble Americas Corp [Member]
Deferred Revenue [Abstract]
Deferred revenue			$ 129	$ 129	$ 129

Partnership Units and Related_3

Partnership Units and Related Matters - Distributions (Details) - USD ($) $ in Millions	3 Months Ended				6 Months Ended
	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Distributions declared and/or paid by the Partnership [Abstract]
Date Paid or To be Paid	Aug. 13, 2020	May 13, 2020	Feb. 13, 2020
Total Distributions	$ 53.1			$ 437.8	$ 295	$ 679.1
Distributions Paid [Member]
Distributions declared and/or paid by the Partnership [Abstract]
Total Distributions	51.7	$ 53.1	$ 241.9
Distributions to Targa Resources Corp.	$ 48.9	$ 50.3	$ 239.1

Partnership Units and Related_4

Partnership Units and Related Matters (Details) - USD ($) $ / shares in Units, $ in Millions	1 Months Ended		3 Months Ended				6 Months Ended
	Jul. 31, 2020	Oct. 31, 2015	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Limited Partners Capital Account [Line Items]
Contributions from Targa Resources Corp.			$ 50			$ 190	$ 50	$ 190
Distributions payable date			Aug. 13, 2020	May 13, 2020	Feb. 13, 2020
Subsequent Event [Member]
Limited Partners Capital Account [Line Items]
Date of declaration for cash distribution	2020-07
Cash distribution declared per unit (in dollars per share)	$ 0.1875
Distributions to Targa Resources Corp.	$ 0.9
Distributions payable date	Aug. 17, 2020
Series A Preferred Limited Partner Units [Member]
Limited Partners Capital Account [Line Items]
Series A preferred limited partners units issued (in units)			5,000,000		5,000,000		5,000,000
Preferred units dividend percentage		9.00%					9.00%
Distribution to holders of preferred units			$ 2.8				$ 5.6
Series A Preferred Limited Partner Units [Member] | London Interbank Offered Rate (LIBOR)
Limited Partners Capital Account [Line Items]
Percentage of variable interest rate for distribution on preferred units upon maturity		7.71%
TRC/TRP Merger [Member] | Limited Partners [Member]
Limited Partners Capital Account [Line Items]
Percentage of capital contribution towards partner's interest maintained							98.00%
TRC/TRP Merger [Member] | Targa Resources GP LLC [Member]
Limited Partners Capital Account [Line Items]
Percentage of general partner's interest maintained							2.00%
Contributions from Targa Resources Corp. (in units)							0
TRC/TRP Merger [Member] | Targa Resources Corp [Member]
Limited Partners Capital Account [Line Items]
Contributions from Targa Resources Corp.			$ 50

Derivative Instruments and He_3

Derivative Instruments and Hedging Activities - Notional Volumes Of The Partnership's Commodity Derivative Contracts (Details)	6 Months Ended
	Jun. 30, 2020MMBTUbbl
Year 2020 [Member] | Swaps [Member] | Natural Gas [Member]
Derivative [Line Items]
Notional volumes of commodity hedges (in MMBtu per day) | MMBTU	167,230
Year 2020 [Member] | Swaps [Member] | NGL [Member]
Derivative [Line Items]
Notional volumes of commodity hedges (in Bbl per day)	30,814
Year 2020 [Member] | Swaps [Member] | Condensate [Member]
Derivative [Line Items]
Notional volumes of commodity hedges (in Bbl per day)	5,190
Year 2020 [Member] | Basis Swaps [Member] | Natural Gas [Member]
Derivative [Line Items]
Notional volumes of commodity hedges (in MMBtu per day) | MMBTU	416,374
Year 2020 [Member] | Future | NGL [Member]
Derivative [Line Items]
Notional volumes of commodity hedges (in Bbl per day)	39,370
Year 2021 [Member] | Swaps [Member] | Natural Gas [Member]
Derivative [Line Items]
Notional volumes of commodity hedges (in MMBtu per day) | MMBTU	166,216
Year 2021 [Member] | Swaps [Member] | NGL [Member]
Derivative [Line Items]
Notional volumes of commodity hedges (in Bbl per day)	23,729
Year 2021 [Member] | Swaps [Member] | Condensate [Member]
Derivative [Line Items]
Notional volumes of commodity hedges (in Bbl per day)	5,864
Year 2021 [Member] | Basis Swaps [Member] | Natural Gas [Member]
Derivative [Line Items]
Notional volumes of commodity hedges (in MMBtu per day) | MMBTU	450,566
Year 2021 [Member] | Future | NGL [Member]
Derivative [Line Items]
Notional volumes of commodity hedges (in Bbl per day)	12,288
Year 2022 [Member] | Swaps [Member] | Natural Gas [Member]
Derivative [Line Items]
Notional volumes of commodity hedges (in MMBtu per day) | MMBTU	86,100
Year 2022 [Member] | Swaps [Member] | NGL [Member]
Derivative [Line Items]
Notional volumes of commodity hedges (in Bbl per day)	12,371
Year 2022 [Member] | Swaps [Member] | Condensate [Member]
Derivative [Line Items]
Notional volumes of commodity hedges (in Bbl per day)	1,610
Year 2022 [Member] | Basis Swaps [Member] | Natural Gas [Member]
Derivative [Line Items]
Notional volumes of commodity hedges (in MMBtu per day) | MMBTU	295,390
Year 2022 [Member] | Future | NGL [Member]
Derivative [Line Items]
Notional volumes of commodity hedges (in Bbl per day)	0
Year 2024 [Member] | Swaps [Member] | Natural Gas [Member]
Derivative [Line Items]
Notional volumes of commodity hedges (in MMBtu per day) | MMBTU	0
Year 2024 [Member] | Swaps [Member] | NGL [Member]
Derivative [Line Items]
Notional volumes of commodity hedges (in Bbl per day)	0
Year 2024 [Member] | Swaps [Member] | Condensate [Member]
Derivative [Line Items]
Notional volumes of commodity hedges (in Bbl per day)	0
Year 2024 [Member] | Basis Swaps [Member] | Natural Gas [Member]
Derivative [Line Items]
Notional volumes of commodity hedges (in MMBtu per day) | MMBTU	90,000
Year 2024 [Member] | Future | NGL [Member]
Derivative [Line Items]
Notional volumes of commodity hedges (in Bbl per day)	0
Year 2025 [Member] | Swaps [Member] | Natural Gas [Member]
Derivative [Line Items]
Notional volumes of commodity hedges (in MMBtu per day) | MMBTU	0
Year 2025 [Member] | Swaps [Member] | NGL [Member]
Derivative [Line Items]
Notional volumes of commodity hedges (in Bbl per day)	0
Year 2025 [Member] | Swaps [Member] | Condensate [Member]
Derivative [Line Items]
Notional volumes of commodity hedges (in Bbl per day)	0
Year 2025 [Member] | Basis Swaps [Member] | Natural Gas [Member]
Derivative [Line Items]
Notional volumes of commodity hedges (in MMBtu per day) | MMBTU	5,000
Year 2025 [Member] | Future | NGL [Member]
Derivative [Line Items]
Notional volumes of commodity hedges (in Bbl per day)	0
Year 2023 [Member] | Swaps [Member] | Natural Gas [Member]
Derivative [Line Items]
Notional volumes of commodity hedges (in MMBtu per day) | MMBTU	20,000
Year 2023 [Member] | Swaps [Member] | NGL [Member]
Derivative [Line Items]
Notional volumes of commodity hedges (in Bbl per day)	0
Year 2023 [Member] | Swaps [Member] | Condensate [Member]
Derivative [Line Items]
Notional volumes of commodity hedges (in Bbl per day)	0
Year 2023 [Member] | Basis Swaps [Member] | Natural Gas [Member]
Derivative [Line Items]
Notional volumes of commodity hedges (in MMBtu per day) | MMBTU	250,000
Year 2023 [Member] | Future | NGL [Member]
Derivative [Line Items]
Notional volumes of commodity hedges (in Bbl per day)	0

Derivative Instruments and He_4

Derivative Instruments and Hedging Activities - Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type (Details) - USD ($) $ in Millions	Jun. 30, 2020	Dec. 31, 2019
Derivatives, Fair Value [Line Items]
Derivative assets	$ 165.3	$ 138.8
Derivative assets	122	103.3
Derivative assets	43.3	35.5
Derivative liabilities	133.4	144.9
Derivative liabilities	80.5	104.1
Derivative liabilities	52.9	40.8
Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative assets	135.3	135.8
Derivative liabilities	107.2	18
Designated as Hedging Instrument [Member] | Commodity Contracts [Member] | Current Assets from Risk Management Activities [Member]
Derivatives, Fair Value [Line Items]
Derivative assets	99.2	102.1
Designated as Hedging Instrument [Member] | Commodity Contracts [Member] | Long-term Assets from Risk Management Activities [Member]
Derivatives, Fair Value [Line Items]
Derivative assets	36.1	33.7
Designated as Hedging Instrument [Member] | Commodity Contracts [Member] | Current Liabilities from Risk Management Activities [Member]
Derivatives, Fair Value [Line Items]
Derivative liabilities	74.6	11.6
Designated as Hedging Instrument [Member] | Commodity Contracts [Member] | Long-term Position [Member]
Derivatives, Fair Value [Line Items]
Derivative liabilities	32.6	6.4
Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative assets	30	3
Derivative liabilities	26.2	126.9
Not Designated as Hedging Instrument [Member] | Commodity Contracts [Member] | Current Assets from Risk Management Activities [Member]
Derivatives, Fair Value [Line Items]
Derivative assets	22.8	1.2
Not Designated as Hedging Instrument [Member] | Commodity Contracts [Member] | Long-term Assets from Risk Management Activities [Member]
Derivatives, Fair Value [Line Items]
Derivative assets	7.2	1.8
Not Designated as Hedging Instrument [Member] | Commodity Contracts [Member] | Current Liabilities from Risk Management Activities [Member]
Derivatives, Fair Value [Line Items]
Derivative liabilities	5.9	92.5
Not Designated as Hedging Instrument [Member] | Commodity Contracts [Member] | Long-term Position [Member]
Derivatives, Fair Value [Line Items]
Derivative liabilities	$ 20.3	$ 34.4

Derivative Instruments and He_5

Derivative Instruments and Hedging Activities - Pro Forma Impact - Offsetting Assets (Details) - USD ($) $ in Millions	Jun. 30, 2020	Dec. 31, 2019
Derivative Asset [Abstract]
Gross asset	$ 165.3	$ 138.8
Pro forma net presentation, asset, total	108.1	79.8
Counterparties with Offsetting Position or Collateral [Member]
Derivative Asset [Abstract]
Gross asset	140.4	133.1
Pro forma net presentation, asset	83.2	74.1
Counterparties without Offsetting Position [Member]
Derivative Asset [Abstract]
Gross asset	24.9	5.7
Pro forma net presentation, asset	24.9	5.7
Current Position [Member]
Derivative Asset [Abstract]
Gross asset	122	103.3
Pro forma net presentation, asset, current	89.7	59.5
Current Position [Member] | Counterparties with Offsetting Position or Collateral [Member]
Derivative Asset [Abstract]
Gross asset	108.9	99.8
Pro forma net presentation, asset	76.6	56
Current Position [Member] | Counterparties without Offsetting Position [Member]
Derivative Asset [Abstract]
Gross asset	13.1	3.5
Pro forma net presentation, asset	13.1	3.5
Long-term Position [Member]
Derivative Asset [Abstract]
Gross asset	43.3	35.5
Pro forma net presentation, asset, noncurrent	18.4	20.3
Long-term Position [Member] | Counterparties with Offsetting Position or Collateral [Member]
Derivative Asset [Abstract]
Gross asset	31.5	33.3
Pro forma net presentation, asset	6.6	18.1
Long-term Position [Member] | Counterparties without Offsetting Position [Member]
Derivative Asset [Abstract]
Gross asset	11.8	2.2
Pro forma net presentation, asset	$ 11.8	$ 2.2

Derivative Instruments and He_6

Derivative Instruments and Hedging Activities - Pro Forma Impact - Offsetting Liabilities (Details) - USD ($) $ in Millions	Jun. 30, 2020	Dec. 31, 2019
Derivative Liability [Abstract]
Gross liability	$ (133.4)	$ (144.9)
Pro forma net presentation, liability, total	(28)	(90.8)
Counterparties with Offsetting Position or Collateral [Member]
Derivative Liability [Abstract]
Gross liability	(129.8)	(125.5)
Pro forma net presentation, liability, total	(24.4)	(71.4)
Counterparties without Offsetting Position [Member]
Derivative Liability [Abstract]
Gross liability	(3.6)	(19.4)
Pro forma net presentation, liability, total	(3.6)	(19.4)
Current Position [Member]
Derivative Liability [Abstract]
Gross liability	(80.5)	(104.1)
Pro forma net presentation, liability, current		(65.2)
Current Position [Member] | Counterparties with Offsetting Position or Collateral [Member]
Derivative Liability [Abstract]
Gross liability	(80.5)	(85)
Pro forma net presentation, liability, current		(46.1)
Current Position [Member] | Counterparties without Offsetting Position [Member]
Derivative Liability [Abstract]
Gross liability		(19.1)
Pro forma net presentation, liability, current		(19.1)
Long-term Position [Member]
Derivative Liability [Abstract]
Gross liability	(52.9)	(40.8)
Pro forma net presentation, liability, noncurrent	(28)	(25.6)
Long-term Position [Member] | Counterparties with Offsetting Position or Collateral [Member]
Derivative Liability [Abstract]
Gross liability	(49.3)	(40.5)
Pro forma net presentation, liability, noncurrent	(24.4)	(25.3)
Long-term Position [Member] | Counterparties without Offsetting Position [Member]
Derivative Liability [Abstract]
Gross liability	(3.6)	(0.3)
Pro forma net presentation, liability, noncurrent	$ (3.6)	$ (0.3)

Derivative Instruments and He_7

Derivative Instruments and Hedging Activities - Pro Forma Impact - Offsetting Collateral (Details) - USD ($) $ in Millions	Jun. 30, 2020	Dec. 31, 2019
Derivative Asset [Abstract]
Gross collateral	$ 48.2	$ (4.9)
Counterparties with Offsetting Position or Collateral [Member]
Derivative Asset [Abstract]
Gross collateral	48.2	(4.9)
Current Position [Member]
Derivative Asset [Abstract]
Gross collateral	48.2	(4.9)
Current Position [Member] | Counterparties with Offsetting Position or Collateral [Member]
Derivative Asset [Abstract]
Gross collateral	$ 48.2	$ (4.9)

Derivative Instruments and He_8

Derivative Instruments and Hedging Activities - Additional Information (Details) $ in Millions	Jun. 30, 2020USD ($)
Derivative Instruments And Hedging Activities Disclosure [Abstract]
Estimated fair value of derivative instruments, net asset	$ 31.9
Amount expected to reclassify commodity hedge related deferred gains to earnings before income taxes	29.8
Amount of deferred gains to be reclassified into earnings before income taxes over next twelve months	$ 26.3

Derivative Instruments and He_9

Derivative Instruments and Hedging Activities - Amounts Included in OCI, Income and AOCI (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Revenues [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Reclassified from OCI into Income (Effective Portion)	$ 60.2	$ 43.3	$ 120.3	$ 64.6
Commodity Contracts [Member] | Revenues [Member] | Not Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in Income on Derivatives	8.1	(1.1)	107.8	(10.5)
Cash Flow Hedging [Member] | Commodity Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in OCI on Derivatives (Effective Portion)	$ (132.9)	$ 88.4	$ 26.2	$ 49.6

Fair Value Measurements - Addit

Fair Value Measurements - Additional Information (Details) $ in Millions	3 Months Ended			6 Months Ended
	Jun. 30, 2020USD ($)Swap	Mar. 31, 2020USD ($)	Jun. 30, 2019USD ($)	Jun. 30, 2020USD ($)Swap	Jun. 30, 2019USD ($)
Fair Value Disclosures [Abstract]
Derivatives financial instruments, fair value, net	$ 31.9			$ 31.9
Derivative fair value of net liability if commodity price increases by 10 percent	(86.5)			(86.5)
Derivative fair value of net asset if commodity price decreases by 10 percent	$ 150.7			$ 150.7
Number of natural gas basis swaps categorized as Level 3 | Swap	0			0
Non-cash pre-tax impairment charges	$ 0	$ 2,442.8	$ 0	$ 2,442.8	$ 0

Fair Value Measurements - Break

Fair Value Measurements - Breakdown by Fair Value Hierarchy Category for Financial Instruments (Details) - USD ($) $ in Millions		Jun. 30, 2020	Dec. 31, 2019
Financial Instruments Recorded on Our Consolidated Balance Sheets at Fair Value [Abstract]
Assets from commodity derivative contracts		$ 108.1	$ 79.8
Liabilities from commodity derivative contracts		28	90.8
Financial Instruments Recorded on Our Consolidated Balance Sheets at Carrying Value [Abstract]
Securitization Facility	[1]	250	370
Carrying Value [Member]
Financial Instruments Recorded on Our Consolidated Balance Sheets at Fair Value [Abstract]
Assets from commodity derivative contracts	[2]	164	136.5
Liabilities from commodity derivative contracts	[2]	132.1	142.6
Financial Instruments Recorded on Our Consolidated Balance Sheets at Carrying Value [Abstract]
Cash and cash equivalents		173.6	291.1
Securitization Facility		250	370
Carrying Value [Member] | TRP Revolver [Member]
Financial Instruments Recorded on Our Consolidated Balance Sheets at Carrying Value [Abstract]
Long-term debt		440
Carrying Value [Member] | Targa Pipeline Partners LP [Member]
Financial Instruments Recorded on Our Consolidated Balance Sheets at Fair Value [Abstract]
Contingent consideration	[3]	2.3	2.3
Carrying Value [Member] | Senior Unsecured Notes [Member]
Financial Instruments Recorded on Our Consolidated Balance Sheets at Carrying Value [Abstract]
Long-term debt		6,725.1	7,028.5
Fair Value [Member]
Financial Instruments Recorded on Our Consolidated Balance Sheets at Fair Value [Abstract]
Assets from commodity derivative contracts	[2]	164	136.5
Liabilities from commodity derivative contracts	[2]	132.1	142.6
Financial Instruments Recorded on Our Consolidated Balance Sheets at Carrying Value [Abstract]
Cash and cash equivalents		173.6	291.1
Securitization Facility		250	370
Fair Value [Member] | TRP Revolver [Member]
Financial Instruments Recorded on Our Consolidated Balance Sheets at Carrying Value [Abstract]
Long-term debt		440
Fair Value [Member] | Targa Pipeline Partners LP [Member]
Financial Instruments Recorded on Our Consolidated Balance Sheets at Fair Value [Abstract]
Contingent consideration	[3]	2.3	2.3
Fair Value [Member] | Senior Unsecured Notes [Member]
Financial Instruments Recorded on Our Consolidated Balance Sheets at Carrying Value [Abstract]
Long-term debt		6,627.2	7,376.9
Fair Value [Member] | Level 2 [Member]
Financial Instruments Recorded on Our Consolidated Balance Sheets at Fair Value [Abstract]
Assets from commodity derivative contracts	[2]	164	136.2
Liabilities from commodity derivative contracts	[2]	132.1	142
Financial Instruments Recorded on Our Consolidated Balance Sheets at Carrying Value [Abstract]
Securitization Facility		250	370
Fair Value [Member] | Level 2 [Member] | TRP Revolver [Member]
Financial Instruments Recorded on Our Consolidated Balance Sheets at Carrying Value [Abstract]
Long-term debt		440
Fair Value [Member] | Level 2 [Member] | Senior Unsecured Notes [Member]
Financial Instruments Recorded on Our Consolidated Balance Sheets at Carrying Value [Abstract]
Long-term debt		6,627.2	7,376.9
Fair Value [Member] | Level 3 [Member]
Financial Instruments Recorded on Our Consolidated Balance Sheets at Fair Value [Abstract]
Assets from commodity derivative contracts	[2]		0.3
Liabilities from commodity derivative contracts	[2]		0.6
Fair Value [Member] | Level 3 [Member] | Targa Pipeline Partners LP [Member]
Financial Instruments Recorded on Our Consolidated Balance Sheets at Fair Value [Abstract]
Contingent consideration	[3]	$ 2.3	$ 2.3
[1]	As of June 30, 2020, we had $250.0 million of qualifying receivables under our $250.0 million accounts receivable securitization facility (“Securitization Facility”), resulting in zero availability. During the second quarter of 2020, we amended the Securitization Facility to decrease the facility size from $400.0 million to $250.0 million to more closely align with our expectations for borrowing needs given commodity prices and to extend the facility termination date to April 21, 2021.
[2]	The fair value of derivative contracts in this table is presented on a different basis than the Consolidated Balance Sheets presentation as disclosed in Note 8– Derivative Instruments and Hedging Activities. The above fair values reflect the total value of each derivative contract taken as a whole, whereas the Consolidated Balance Sheets presentation is based on the individual maturity dates of estimated future settlements. As such, an individual contract could have both an asset and liability position when segregated into its current and long-term portions for Consolidated Balance Sheets classification purposes.
[3]	We have a contingent consideration liability for TPL’s previous acquisition of a gas gathering system and related assets, which is carried at fair value.

Fair Value Measurements - Chang

Fair Value Measurements - Changes in Fair Value of Financial Instruments Classified as Level 3 (Details) $ in Millions	6 Months Ended
	Jun. 30, 2020USD ($)
Contingent Consideration [Member]
Changes in fair value of financial instruments classified as Level 3 in fair value hierarchy [Roll Forward]
Balance, beginning of period	$ (2.3)
Balance, end of period	(2.3)
Commodity Derivative Contracts Asset/(Liability) [Member]
Changes in fair value of financial instruments classified as Level 3 in fair value hierarchy [Roll Forward]
Balance, beginning of period	(0.3)
Transfers out of Level 3	$ 0.3	[1]
[1]	Transfers relate to long-term over-the-counter swaps for NGL products for which observable market prices became available for substantially their full term.

Related Party Transactions - _3

Related Party Transactions - Targa - Summary of Transactions with Affiliates (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Summary of transactions with Targa [Abstract]
Cash distributions to Targa based on general partner and limited partner ownership		$ 53.1	$ 437.8	$ 295	$ 679.1
Cash contributions from Targa related to limited partner ownership				49	186.2
Targa Resources Corp. [Member]
Summary of transactions with Targa [Abstract]
Targa billings of payroll and related costs included in operating expenses		66.6	61.6	132.2	115.7
Targa allocation of general and administrative expense		56	61.1	108.5	128.8
Cash distributions to Targa based on general partner and limited partner ownership		50.3	435	289.4	673.5
Cash contributions from Targa related to limited partner ownership	[1]	49	186.2	49	186.2
Contributions from Targa Resources Corp		$ 1	$ 3.8	$ 1	$ 3.8
Targa Resources Corp. [Member] | Targa Resources GP LLC [Member]
Summary of transactions with Targa [Abstract]
Percentage of general partner's interest maintained		2.00%	2.00%	2.00%	2.00%
[1]	The cash contributions from Targa related to limited partner ownership were allocated 98% to the limited partner and 2% to general partner. See Note 7 – Partnership Units and Related Matters.

Related Party Transactions - _4

Related Party Transactions - Targa - Summary of Transactions with Affiliates (Parenthetical) (Details) - Targa Resources Corp. [Member]	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Limited Partners [Member]
Related Party Transaction [Line Items]
Percentage of capital contribution towards partner's interest maintained	98.00%	98.00%	98.00%	98.00%
Targa Resources GP LLC [Member]
Related Party Transaction [Line Items]
Percentage of general partner's interest maintained	2.00%	2.00%	2.00%	2.00%

Revenue - Estimated Minimum Rev

Revenue - Estimated Minimum Revenue Expected to be Recognized in Future Related to Unsatisfied Performance Obligations (Details) - Fixed Price Contract [Member] $ in Millions	Jun. 30, 2020USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2020-07-01
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items]
Fixed consideration to be recognized	$ 270.6
Estimated remaining duration of contracts	6 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2021-01-01
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items]
Fixed consideration to be recognized	$ 515
Estimated remaining duration of contracts	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2022-01-01
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items]
Fixed consideration to be recognized	$ 3,202.7
Estimated remaining duration of contracts

Revenue - Additional Informatio

Revenue - Additional Information (Details) - Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2020-07-01	Jun. 30, 2020
Minimum [Member]
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items]
Estimated remaining duration of contracts	1 year
Maximum [Member]
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items]
Estimated remaining duration of contracts	19 years

Supplemental Cash Flow Inform_3

Supplemental Cash Flow Information (Details) - USD ($) $ in Millions		6 Months Ended
		Jun. 30, 2020	Jun. 30, 2019
Cash:
Interest paid, net of capitalized interest	[1]	$ 165.3	$ 106.2
Income taxes paid, net of refunds		0.1	(1.7)
Non-cash investing activities:
Impact of capital expenditure accruals on property, plant and equipment, net		(143.9)	(4.3)
Transfers from materials and supplies inventory to property, plant and equipment		1.8	16.4
Non-cash financing activities:
Changes in accrued distributions to noncontrolling interests		$ (1.9)	$ 49.6
[1]	Interest capitalized on major projects was $22.5 million and $36.1 million for the six months ended June 30, 2020 and 2019.

Supplemental Cash Flow Inform_4

Supplemental Cash Flow Information (Parenthetical) (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Supplemental Cash Flow Elements [Abstract]
Interest capitalized on major projects	$ 22.5	$ 36.1

Segment Information - Additiona

Segment Information - Additional Information (Details)	6 Months Ended
	Jun. 30, 2020Segment
Segment Reporting [Abstract]
Number of reportable segments	2

Segment Information - Revenues

Segment Information - Revenues and Operating Margin (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Revenues [Abstract]
Revenues	$ 1,523.5	$ 1,995.3	$ 3,572.4	$ 4,294.7
Operating margin	479.5	423.5	1,145.5	806.6
Sales of Commodities [Member]
Revenues [Abstract]
Revenues	1,280.6	1,684.2	3,060.2	3,660.7
Fees from Midstream Services [Member]
Revenues [Abstract]
Revenues	242.9	311.1	512.2	634
Gathering and Processing [Member]
Revenues [Abstract]
Revenues	634.2	1,015.8	1,441.2	2,297
Operating margin	237.2	232.1	492.8	470.3
Logistics and Transportation [Member]
Revenues [Abstract]
Revenues	1,322.6	1,564.3	2,957.8	3,458.1
Operating margin	231.5	184.4	525.5	336.3
Other [Member]
Revenues [Abstract]
Revenues	10.8	7	127.2
Operating margin	10.8	7	127.2
Corporate and Elimination [Member]
Revenues [Abstract]
Revenues	(444.1)	(591.8)	(953.8)	(1,460.4)
Operating Segments [Member]
Revenues [Abstract]
Revenues	1,523.5	1,995.3	3,572.4	4,294.7
Operating Segments [Member] | Sales of Commodities [Member]
Revenues [Abstract]
Revenues	1,280.6	1,684.2	3,060.2	3,660.7
Operating Segments [Member] | Fees from Midstream Services [Member]
Revenues [Abstract]
Revenues	242.9	311.1	512.2	634
Operating Segments [Member] | Gathering and Processing [Member]
Revenues [Abstract]
Revenues	243.5	474.6	605.5	931.2
Operating Segments [Member] | Gathering and Processing [Member] | Sales of Commodities [Member]
Revenues [Abstract]
Revenues	133.5	298.4	377.3	555.1
Operating Segments [Member] | Gathering and Processing [Member] | Fees from Midstream Services [Member]
Revenues [Abstract]
Revenues	110	176.2	228.2	376.1
Operating Segments [Member] | Logistics and Transportation [Member]
Revenues [Abstract]
Revenues	1,269.2	1,513.7	2,839.7	3,363.5
Operating Segments [Member] | Logistics and Transportation [Member] | Sales of Commodities [Member]
Revenues [Abstract]
Revenues	1,136.3	1,378.8	2,555.7	3,105.6
Operating Segments [Member] | Logistics and Transportation [Member] | Fees from Midstream Services [Member]
Revenues [Abstract]
Revenues	132.9	134.9	284	257.9
Operating Segments [Member] | Other [Member]
Revenues [Abstract]
Revenues	10.8	7	127.2
Operating Segments [Member] | Other [Member] | Sales of Commodities [Member]
Revenues [Abstract]
Revenues	10.8	7	127.2
Intersegment Eliminations [Member] | Gathering and Processing [Member]
Revenues [Abstract]
Revenues	390.7	541.2	835.7	1,365.8
Intersegment Eliminations [Member] | Gathering and Processing [Member] | Sales of Commodities [Member]
Revenues [Abstract]
Revenues	389.2	539.7	832.4	1,362.5
Intersegment Eliminations [Member] | Gathering and Processing [Member] | Fees from Midstream Services [Member]
Revenues [Abstract]
Revenues	1.5	1.5	3.3	3.3
Intersegment Eliminations [Member] | Logistics and Transportation [Member]
Revenues [Abstract]
Revenues	53.4	50.6	118.1	94.6
Intersegment Eliminations [Member] | Logistics and Transportation [Member] | Sales of Commodities [Member]
Revenues [Abstract]
Revenues	46.1	43.6	102.7	82.1
Intersegment Eliminations [Member] | Logistics and Transportation [Member] | Fees from Midstream Services [Member]
Revenues [Abstract]
Revenues	7.3	7	15.4	12.5
Intersegment Eliminations [Member] | Corporate and Elimination [Member]
Revenues [Abstract]
Revenues	(444.1)	(591.8)	(953.8)	(1,460.4)
Intersegment Eliminations [Member] | Corporate and Elimination [Member] | Sales of Commodities [Member]
Revenues [Abstract]
Revenues	(435.3)	(583.3)	(935.1)	(1,444.6)
Intersegment Eliminations [Member] | Corporate and Elimination [Member] | Fees from Midstream Services [Member]
Revenues [Abstract]
Revenues	$ (8.8)	$ (8.5)	$ (18.7)	$ (15.8)

Segment Information - Other Fin

Segment Information - Other Financial Information (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Other financial information [Abstract]
Total assets		$ 15,916.3		$ 15,916.3		$ 18,744.5
Operating Segments [Member]
Other financial information [Abstract]
Total assets	[1]	15,916.3	$ 18,252.7	15,916.3	$ 18,252.7
Goodwill		45.2	46.6	45.2	46.6
Capital expenditures		169.6	857.1	473.8	1,762.6
Gathering and Processing [Member] | Operating Segments [Member]
Other financial information [Abstract]
Total assets	[1]	9,124.2	12,144.4	9,124.2	12,144.4
Goodwill		45.2	46.6	45.2	46.6
Capital expenditures		37.1	420.8	154.6	838.5
Logistics and Transportation [Member] | Operating Segments [Member]
Other financial information [Abstract]
Total assets	[1]	6,697.2	5,994.7	6,697.2	5,994.7
Capital expenditures		127.9	425.5	306.3	896.3
Other [Member] | Operating Segments [Member]
Other financial information [Abstract]
Total assets	[1]	22	19	22	19
Corporate and Elimination [Member] | Operating Segments [Member]
Other financial information [Abstract]
Total assets	[1]	72.9	94.6	72.9	94.6
Capital expenditures		$ 4.6	$ 10.8	$ 12.9	$ 27.8
[1]	Assets in the Corporate and Eliminations column primarily include cash, prepaids and debt issuance costs for our TRP Revolver.

Segment Information - Revenue_2

Segment Information - Revenues Disaggregated by Product and Service (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Revenue from External Customer [Line Items]
Revenue recognized from customer and non-customer		$ 1,212.3	$ 1,642	$ 2,832.1	$ 3,606.6
Non-customer revenue		68.3	42.2	228.1	54.1
Total revenues		1,523.5	1,995.3	3,572.4	4,294.7
Designated as Hedging Instrument [Member]
Revenue from External Customer [Line Items]
Non-customer revenue		60.2	43.3	120.3	64.6
Not Designated as Hedging Instrument [Member]
Revenue from External Customer [Line Items]
Non-customer revenue	[1]	8.1	(1.1)	107.8	(10.5)
Natural Gas [Member]
Revenue from External Customer [Line Items]
Revenue recognized from customer and non-customer		269.7	217.6	542.8	628.9
NGL [Member]
Revenue from External Customer [Line Items]
Revenue recognized from customer and non-customer		908.2	1,195.5	2,069.5	2,591.9
Condensate and Crude Oil [Member]
Revenue from External Customer [Line Items]
Revenue recognized from customer and non-customer		27.6	172.1	163.3	309.8
Petroleum Products [Member]
Revenue from External Customer [Line Items]
Revenue recognized from customer and non-customer		6.8	56.8	56.5	76
Sales of Commodities [Member]
Revenue from External Customer [Line Items]
Total revenues		1,280.6	1,684.2	3,060.2	3,660.7
Gathering and Processing [Member]
Revenue from External Customer [Line Items]
Revenue recognized from customer and non-customer		107.4	177.5	223.3	371.9
NGL Transportation, Fractionation and Services [Member]
Revenue from External Customer [Line Items]
Revenue recognized from customer and non-customer		32.9	40.1	72.8	76.3
Storage, Terminaling and Export [Member]
Revenue from External Customer [Line Items]
Revenue recognized from customer and non-customer		89.1	90.4	188.8	170
Other [Member]
Revenue from External Customer [Line Items]
Revenue recognized from customer and non-customer		13.5	3.1	27.3	15.8
Fees from Midstream Services [Member]
Revenue from External Customer [Line Items]
Revenue recognized from customer and non-customer		242.9	311.1	512.2	634
Total revenues		$ 242.9	$ 311.1	$ 512.2	$ 634
[1]	Represents derivative activities that are not designated as hedging instruments under ASC 815.

Segment Information - Reconcili

Segment Information - Reconciliation of Reportable Segment Operating Margin to Income (Loss) Before Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended			6 Months Ended
	Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Reconciliation of reportable segment operating margin to income (loss) before income taxes:
Operating margin	$ 479.5		$ 423.5	$ 1,145.5	$ 806.6
Depreciation and amortization expense	(204.5)		(237.2)	(443.6)	(474.6)
General and administrative expense	(58.6)		(69.3)	(115.5)	(146.7)
Impairment of long-lived assets	0	$ (2,442.8)	0	(2,442.8)	0
Interest expense, net	(94.3)		(69.5)	(188.1)	(144.9)
Equity earnings (loss)	14.9		3.2	35.5	5.9
Gain (loss) on sale or disposition of business and assets	0.7		0.2	0	(3.1)
Gain (loss) from financing activities	21.8		0	61.1	(1.4)
Change in contingent considerations	0		0.8	0	(8.9)
Other, net	(0.3)			(0.8)	(0.2)
Income (loss) before income taxes	159.2		51.7	(1,948.7)	32.7
Gathering and Processing [Member]
Reconciliation of reportable segment operating margin to income (loss) before income taxes:
Operating margin	237.2		232.1	492.8	470.3
Logistics and Transportation [Member]
Reconciliation of reportable segment operating margin to income (loss) before income taxes:
Operating margin	231.5		184.4	525.5	$ 336.3
Other [Member]
Reconciliation of reportable segment operating margin to income (loss) before income taxes:
Operating margin	$ 10.8		$ 7	$ 127.2