GEOGRAPHIC AREAS AND INDUSTRY SEGMENTS - RESULTS OF OPERATIONS (Details) shares in Millions, $ in Millions		1 Months Ended	3 Months Ended	12 Months Ended
	Dec. 31, 2023 USD ($)	Sep. 30, 2023 USD ($)	Jun. 30, 2023 USD ($)	Dec. 31, 2023 USD ($) segment shares	Dec. 31, 2022 USD ($) shares	Dec. 31, 2021 USD ($) shares
Segment Reporting [Abstract]
Number of operating segments | segment				3
Segment Information
Net sales				$ 28,257	$ 36,634	$ 25,956
Income (loss) from continuing operations before income taxes				6,429	14,117	3,705
Income tax expense				(1,733)	(813)	(915)
Income from continuing operations				4,696	13,304	2,790
Investments in unconsolidated entities	$ 3,224			3,224	3,176	2,938
Property, plant and equipment additions				6,368	4,566	2,931
Depreciation, depletion and amortization				6,865	6,926	8,447
Total assets	74,008			74,008	72,609	75,036
Gains on sales of assets and other, net		$ 142		522	308	192
Loss on derivative instruments				0	(317)	(122)
Acquisition-related costs				26	89	153
Carbon Engineering, Ltd.
Segment Information
Equity interest in acquiree, remeasurement gain	283
Maxus Filed Bankruptcy
Segment Information
Gain (loss) related to legal settlements			$ 260
Black Butte Coal Company
Segment Information
Impairment of equity method investment				29
Land
Segment Information
Impairment and related charges				180
WES | Disposal Group, Disposed of by Sale, Not Discontinued Operations
Segment Information
Gain on sale				$ 51	$ 62	$ 102
Number of shares sold (in shares) | shares				5.1	10.0	14.0
Oil and gas | Black Butte Coal Company
Segment Information
Impairment of equity method investment				$ 29
Oil and gas | Land
Segment Information
Impairment and related charges				180
Operating segments | Oil and gas
Segment Information
Net sales				21,284	$ 27,165	$ 18,941
Income (loss) from continuing operations before income taxes				6,240	12,803	4,145
Income tax expense				0	0	0
Income from continuing operations				6,240	12,803	4,145
Investments in unconsolidated entities	93			93	142	154
Property, plant and equipment additions				5,028	3,898	2,458
Depreciation, depletion and amortization				6,112	6,179	7,741
Total assets	53,786			53,786	54,058	56,132
Gain (loss) related to legal settlements				26
Pre-tax impairment charges						282
Loss on derivative instruments						280
Operating segments | Oil and gas | Permian Basin | Disposal Group, Disposed of by Sale, Not Discontinued Operations
Segment Information
Gains on sales of assets and other, net				142	148
Operating segments | Oil and gas | Colombia | Disposal Group, Disposed of by Sale, Not Discontinued Operations
Segment Information
Earnout from divestiture of businesses				25
Gain on sale					55
Operating segments | Chemical
Segment Information
Net sales				5,321	6,757	5,246
Income (loss) from continuing operations before income taxes				1,531	2,508	1,544
Income tax expense				0	0	0
Income from continuing operations				1,531	2,508	1,544
Investments in unconsolidated entities	550			550	578	608
Property, plant and equipment additions				551	331	316
Depreciation, depletion and amortization				356	370	343
Total assets	4,682			4,682	4,558	4,671
Operating segments | Midstream and marketing
Segment Information
Net sales				2,551	4,136	2,863
Income (loss) from continuing operations before income taxes				24	273	257
Income tax expense				0	0	0
Income from continuing operations				24	273	257
Investments in unconsolidated entities	2,581			2,581	2,456	2,176
Property, plant and equipment additions				664	270	107
Depreciation, depletion and amortization				326	328	325
Total assets	13,327			13,327	12,076	11,132
Operating segments | Midstream and marketing | Carbon Engineering, Ltd.
Segment Information
Equity interest in acquiree, remeasurement gain				283
Acquisition-related costs				20
Operating segments | Midstream and marketing | WES | Disposal Group, Disposed of by Sale, Not Discontinued Operations
Segment Information
Impairment and related charges				60
Gain on sale				$ 51	$ 62	124
Loss on derivative instruments						$ 252
Number of shares sold (in shares) | shares				5.1	10.0	11.5
Mark to market (loss) gain on interest rate swaps				$ (14)	$ (259)
Operating segments | Midstream and marketing | Joint Venture | Disposal Group, Disposed of by Sale, Not Discontinued Operations
Segment Information
Gain on sale					36
Corporate and eliminations
Segment Information
Net sales				(899)	(1,424)	$ (1,094)
Income (loss) from continuing operations before income taxes				(1,366)	(1,467)	(2,241)
Income tax expense				(1,733)	(813)	(915)
Income from continuing operations				(3,099)	(2,280)	(3,156)
Investments in unconsolidated entities	0			0	0	0
Property, plant and equipment additions				125	67	50
Depreciation, depletion and amortization				71	49	38
Total assets	$ 2,213			2,213	1,917	3,101
Acquisition-related costs				6	89	153
Mark to market (loss) gain on interest rate swaps					317	122
Gain on extinguishment of debt					149	$ 118
Non-cash tax benefit					$ 2,700
Corporate and eliminations | Maxus Filed Bankruptcy
Segment Information
Gain (loss) related to legal settlements				$ (260)