Segments - Schedule of Industry Segments and Eliminations (Details) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022 USD ($)	Jun. 30, 2021 USD ($)	Jun. 30, 2022 USD ($) segment	Jun. 30, 2021 USD ($) shares
Segment Information
Number of operating segments | segment			3
Net sales	$ 10,676	$ 5,958	$ 19,025	$ 11,251
Income (loss) from continuing operations before income taxes	4,986	143	8,069	458
Income tax benefit (expense)	(1,231)	(43)	562	(59)
Income (loss) from continuing operations	3,755	100	8,631	399
Gain (loss) on derivative instrument	127	(223)	262	176
Mark to market gain (loss) on interest rate swaps	96
Operating segments | Oil and gas
Segment Information
Net sales	7,696	4,505	13,771	8,169
Income (loss) from continuing operations before income taxes	4,094	631	6,992	569
Income tax benefit (expense)	0	0	0	0
Income (loss) from continuing operations	4,094	631	6,992	569
Gain (loss) on derivative instrument		(140)		(180)
Impairment charge				156
Operating segments | Oil and gas | Disposed of by sale, not discontinued operations | Permian Basin
Segment Information
Gain on sale			147
Operating segments | Chemical
Segment Information
Net sales	1,909	1,187	3,593	2,275
Income (loss) from continuing operations before income taxes	800	312	1,471	563
Income tax benefit (expense)	0	0	0	0
Income (loss) from continuing operations	800	312	1,471	563
Operating segments | Midstream and marketing
Segment Information
Net sales	1,474	497	2,356	1,304
Income (loss) from continuing operations before income taxes	264	(30)	214	252
Income tax benefit (expense)	0	0	0	0
Income (loss) from continuing operations	264	(30)	214	252
Gain (loss) on derivative instrument		(180)		(165)
Mark to market gain (loss) on interest rate swaps			(102)
Operating segments | Midstream and marketing | Disposed of by sale, not discontinued operations | WES Midstream segment
Segment Information
Gain on sale				$ 124
Number of limited partner units sold (in units) | shares				11.5
Corporate and eliminations
Segment Information
Net sales	(403)	(231)	(695)	$ (497)
Income (loss) from continuing operations before income taxes	(172)	(770)	(608)	(926)
Income tax benefit (expense)	(1,231)	(43)	562	(59)
Income (loss) from continuing operations	(1,403)	(813)	(46)	(985)
Mark to market gain (loss) on interest rate swaps	127	$ (223)	262	$ 176
Gain on debt extinguished	$ 179
Non-cash income tax benefit from reorganization			2,600
Gain loss on debt tenders			$ 161