SEGMENTS - Schedule of Industry Segments and Eliminations (Details) shares in Millions, $ in Millions	1 Months Ended	3 Months Ended		9 Months Ended
	Aug. 31, 2024 USD ($) shares	Sep. 30, 2024 USD ($) shares	Sep. 30, 2023 USD ($) shares	Sep. 30, 2024 USD ($) segment shares	Sep. 30, 2023 USD ($) shares
Segment Information
Number of operating segments | segment				3
Net sales		$ 7,173	$ 7,158	$ 19,965	$ 21,085
Income (loss) before income taxes		1,594	1,809	4,239	4,870
Income tax expense		(454)	(434)	(1,223)	(1,372)
Income from continuing operations		1,140	1,375	3,016	3,498
Gain on disposition of assets		(79)	192	(52)	197
Income from equity investments and other		166	106	709	391
Acquisition-related costs		49	0	75	0
Deferred Income Tax Charge
Segment Information
Deferred tax charges, contract renewal					65
WES Midstream
Segment Information
Gain on sale	$ 489
Number of limited partner units sold (in shares) | shares	19.5
Oil and gas | Black Butte Coal
Segment Information
Impairment of equity method investment					29
Oil and gas | Land
Segment Information
Impairment and related charges					180
Midstream and marketing
Segment Information
Net derivative gain (loss)			(81)		(41)
Midstream and marketing | WES Midstream
Segment Information
Impairment and related charges		21		21
Gain on sale		$ 489		$ 489
Number of limited partner units sold (in shares) | shares		19.5		19.5
Net derivative gain (loss)		$ 142		$ 56
Income from equity investments and other				158
Midstream and marketing | TerraLithium
Segment Information
Fair value gain				27
Operating segments | Oil and gas
Segment Information
Net sales		5,697	5,594	16,081	15,860
Income (loss) before income taxes		1,165	1,969	4,042	4,668
Income tax expense		0	0	0	0
Income from continuing operations		1,165	1,969	4,042	4,668
Loss on sale of business		572		572
Legal settlement expense				54
Gains related to legal settlements					26
Operating segments | Oil and gas | Permian Basin | Disposed of by Sale, Not Discontinued Operations
Segment Information
Gain on disposition of assets			142		142
Operating segments | Chemical
Segment Information
Net sales		1,246	1,309	3,706	4,089
Income (loss) before income taxes		304	373	854	1,281
Income tax expense		0	0	0	0
Income from continuing operations		304	373	854	1,281
Operating segments | Midstream and marketing
Segment Information
Net sales		440	552	821	1,919
Income (loss) before income taxes		631	(130)	714	(158)
Income tax expense		0	0	0	0
Income from continuing operations		631	(130)	714	(158)
Operating segments | Midstream and marketing | WES Midstream | Disposed of by Sale, Not Discontinued Operations
Segment Information
Impairment and related charges			34		60
Gain on sale			$ 51		$ 51
Number of limited partner units sold (in shares) | shares			5.1		5.1
Corporate and eliminations
Segment Information
Net sales		(210)	$ (297)	(643)	$ (783)
Income (loss) before income taxes		(506)	(403)	(1,371)	(921)
Income tax expense		(454)	(434)	(1,223)	(1,372)
Income from continuing operations		(960)	$ (837)	(2,594)	(2,293)
Corporate and eliminations | Maxus Filed Bankruptcy
Segment Information
Gains related to legal settlements					$ 260
Corporate and eliminations | CrownRock Acquisition
Segment Information
Acquisition-related costs		$ 56		$ 141