Reportable Segments Segment Adjusted EBITDA (Details) - USD ($) $ in Millions	3 Months Ended			6 Months Ended			12 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	[1]	Jun. 30, 2020	Jun. 30, 2019	[1]	Dec. 31, 2019	Dec. 31, 2018
Segment Reporting Information [Line Items]
Inventory valuation adjustments	$ 90	$ 4		$ (137)	$ 97
Segment Adjusted EBITDA	2,441	2,828		5,079	5,561
Depreciation, depletion and amortization	(934)	(781)		(1,799)	(1,552)
Interest expense, net of interest capitalized	(578)	(578)		(1,178)	(1,105)
Asset Impairment Charges	(4)	0		(1,329)	(50)
Losses on interest rate derivatives	(3)	(122)		(332)	(196)
Non-cash compensation expense	(41)	(29)		(63)	(58)
Unrealized gains (losses) on commodity risk management activities	(48)	(23)		3	26
Gain (Loss) on Extinguishment of Debt	0	0		(59)	(2)
Adjusted EBITDA related to unconsolidated affiliates	(157)	(163)		(311)	(309)
Equity in earnings of unconsolidated affiliates	85	77		78	142
Other, net	(34)	104		(20)	108
INCOME BEFORE INCOME TAX EXPENSE (BENEFIT)	817	1,317		(68)	2,662		$ 5,312	$ 4,099
Income tax expense (benefit)	(98)	(35)		(127)	(161)
Net income (loss)	719	1,282		(195)	2,501		$ 5,112	$ 3,829
Intrastate transportation and storage
Segment Reporting Information [Line Items]
Segment Adjusted EBITDA	187	290		427	542
Interstate transportation and storage
Segment Reporting Information [Line Items]
Segment Adjusted EBITDA	403	460		807	916
Midstream
Segment Reporting Information [Line Items]
Segment Adjusted EBITDA	367	412		750	794
NGL and refined products transportation and services
Segment Reporting Information [Line Items]
Segment Adjusted EBITDA	674	644		1,337	1,256
Crude oil transportation and services
Segment Reporting Information [Line Items]
Segment Adjusted EBITDA	519	752		1,110	1,496
Investment In Sunoco LP [Member]
Segment Reporting Information [Line Items]
Segment Adjusted EBITDA	182	152		391	305
Investment In USAC [Member]
Segment Reporting Information [Line Items]
Segment Adjusted EBITDA	105	105		211	206
All other
Segment Reporting Information [Line Items]
Segment Adjusted EBITDA	$ 4	$ 13		$ 46	$ 46

[1] *As adjusted. See Note 1.