Reportable Segments Table - Segment Adjusted EBITDA (Details) - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2021	Mar. 31, 2020
Segment Reporting Information [Line Items]
Segment Adjusted EBITDA	$ 5,040	$ 2,635
Depreciation, depletion and amortization	(954)	(867)
Interest expense, net	(589)	(602)
Impairment losses	(3)	(1,325)
Gains (losses) on interest rate derivatives	194	(329)
Non-cash compensation expense	(28)	(22)
Losses on extinguishments of debt	(7)	(62)
Inventory valuation adjustments	100	(227)
Equity in earnings (losses) of unconsolidated affiliates	55	(7)
INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAX EXPENSE	3,716	(936)
Income tax (benefit) expense from continuing operations	(75)	(28)
Net income (loss)	3,641	(964)
Unrealized gains (losses) on commodity risk management activities	46	51
Adjusted EBITDA related to unconsolidated affiliates	(123)	(154)
Other	(15)	(27)
Intrastate Transportation And Storage [Member]
Segment Reporting Information [Line Items]
Segment Adjusted EBITDA	2,813	240
Investment In Sunoco LP [Member]
Segment Reporting Information [Line Items]
Segment Adjusted EBITDA	157	209
Investment In USAC [Member]
Segment Reporting Information [Line Items]
Segment Adjusted EBITDA	100	106
Interstate Transportation and Storage [Member]
Segment Reporting Information [Line Items]
Segment Adjusted EBITDA	453	404
Midstream [Member]
Segment Reporting Information [Line Items]
Segment Adjusted EBITDA	288	383
NGL and refined products transportation and services [Member]
Segment Reporting Information [Line Items]
Segment Adjusted EBITDA	647	663
Crude oil transportation and services [Member]
Segment Reporting Information [Line Items]
Segment Adjusted EBITDA	510	591
All Other Segment
Segment Reporting Information [Line Items]
Segment Adjusted EBITDA	$ 72	$ 39

Proportionate amount contributed by an equity method investee to the segment performance measure.

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