INDUSTRY SEGMENTS AND GEOGRAPHIC AREAS - Other Segment Expenses (Details) - USD ($) $ in Millions	1 Months Ended	12 Months Ended
	Sep. 30, 2023	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Segment Information
Net sales		$ 21,593	$ 22,019	$ 23,156
Gains (losses) on sales of assets and other, net	$ 142	263	(60)	522
Total		22,075	22,195	23,831
Oil and gas lease operating expense		4,681	4,738	4,677
Transportation and gathering expense		1,660	1,608	1,481
Other operating and non-operating expense		1,556	1,319	1,165
Taxes other than on income		1,030	1,039	1,087
Purchased commodities and midstream cost of sales		176	431	2,116
Depreciation, depletion and amortization		7,533	6,951	6,449
Total		19,023	18,930	19,595
Income before income taxes and other items		3,052	3,265	4,236
Income from equity investments and other		76	759	426
Income from continuing operations before income taxes		3,128	4,024	4,662
Oil and gas | Other Operating Segments And Intersegment Eliminations
Segment Information
Net sales		20,902	21,705	21,284
Gains (losses) on sales of assets and other, net		(70)	(551)	192
Total		20,832	21,154	21,476
Oil and gas lease operating expense		4,681	4,738	4,677
Transportation and gathering expense		1,629	1,583	1,427
Other operating and non-operating expense		1,161	997	889
Taxes other than on income		1,009	1,026	1,076
Depreciation, depletion and amortization		7,115	6,565	6,112
Other segment expenses		633	993	1,031
Total		16,228	15,902	15,212
Income before income taxes and other items		4,604	5,252	6,264
Income from equity investments and other		(18)	(38)	(24)
Income from continuing operations before income taxes		4,586	5,214	6,240
Midstream and marketing | Other Operating Segments And Intersegment Eliminations
Segment Information
Net sales		1,279	886	2,433
Gains (losses) on sales of assets and other, net		500	628	494
Total		1,779	1,514	2,927
Other operating and non-operating expense		359	289	234
Purchased commodities and midstream cost of sales		800	1,035	2,749
Depreciation, depletion and amortization		294	273	266
Other segment expenses		168	151	163
Total		1,621	1,748	3,412
Income before income taxes and other items		158	(234)	(485)
Income from equity investments and other		94	797	450
Income from continuing operations before income taxes		$ 252	$ 563	$ (35)