BUSINESS SEGMENT INFORMATION - Financial Segment Information (Details) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
Operating Expenses:
Lease operating expenses		$ 314	$ 344
Taxes other than income		50	70
Exploration		44	25
Depreciation, depletion, and amortization		308	291
Asset retirement obligation accretion		28	29
Total operating expenses		1,033	1,191
Operating Income (Loss)		912	1,478
Other Income (Expense):
Derivative instrument losses, net		0	(62)
Gain on divestitures, net		1	1,176
Other, net		(32)	45
General and administrative		(58)	(151)
Transaction, reorganization, and separation		(4)	(14)
Financing costs, net		(49)	(140)
NET INCOME BEFORE INCOME TAXES		770	2,332
Total assets		14,259	13,494	$ 14,255
Operating Segments | Egypt
Operating Expenses:
Lease operating expenses		97	131
Taxes other than income		0	0
Exploration		36	15
Depreciation, depletion, and amortization		123	97
Asset retirement obligation accretion		0	0
Total operating expenses		263	248
Operating Income (Loss)		459	643
Other Income (Expense):
Total assets		3,334	2,966
Impairments of oil and gas properties			1
Operating Segments | North Sea
Operating Expenses:
Lease operating expenses		77	96
Taxes other than income		0	0
Exploration		5	5
Depreciation, depletion, and amortization		58	62
Asset retirement obligation accretion		18	20
Total operating expenses		169	195
Operating Income (Loss)		183	248
Other Income (Expense):
Total assets		1,836	2,169
Impairments of oil and gas properties		3
Operating Segments | U.S.
Operating Expenses:
Lease operating expenses		140	118
Taxes other than income		50	67
Exploration		3	4
Depreciation, depletion, and amortization		127	130
Asset retirement obligation accretion		10	8
Total operating expenses		601	755
Operating Income (Loss)		270	578
Other Income (Expense):
Total assets		9,089	8,359
Impairments of oil and gas properties		2	3
Reportable Legal Entities | Altus Midstream
Operating Expenses:
Lease operating expenses		0	0
Taxes other than income		0	3
Exploration		0	0
Depreciation, depletion, and amortization		0	2
Asset retirement obligation accretion		0	1
Total operating expenses		0	11
Operating Income (Loss)		0	10
Other Income (Expense):
Total assets		0	0
Intersegment Eliminations & Other
Operating Expenses:
Lease operating expenses		0	(1)
Taxes other than income		0	0
Exploration		0	1
Depreciation, depletion, and amortization		0	0
Asset retirement obligation accretion		0	0
Total operating expenses		0	(18)
Operating Income (Loss)		0	(1)
Other Income (Expense):
Total assets		0	0
Oil and gas, excluding purchased
Segment Reporting Information [Line Items]
Oil, natural gas, and natural gas liquids production revenues	[1]	1,706	2,320
Operating Expenses:
Cost of oil and gas purchased	[1]	73	81
Oil and gas, excluding purchased | Operating Segments | Egypt
Segment Reporting Information [Line Items]
Oil, natural gas, and natural gas liquids production revenues		722	891
Operating Expenses:
Cost of oil and gas purchased		7	5
Oil and gas, excluding purchased | Operating Segments | North Sea
Segment Reporting Information [Line Items]
Oil, natural gas, and natural gas liquids production revenues		352	443
Operating Expenses:
Cost of oil and gas purchased		11	12
Oil and gas, excluding purchased | Operating Segments | U.S.
Segment Reporting Information [Line Items]
Oil, natural gas, and natural gas liquids production revenues		632	989
Operating Expenses:
Cost of oil and gas purchased		55	77
Oil and gas, excluding purchased | Reportable Legal Entities | Altus Midstream
Segment Reporting Information [Line Items]
Oil, natural gas, and natural gas liquids production revenues		0	0
Operating Expenses:
Cost of oil and gas purchased		0	5
Oil and gas, excluding purchased | Intersegment Eliminations & Other
Segment Reporting Information [Line Items]
Oil, natural gas, and natural gas liquids production revenues		0	(3)
Operating Expenses:
Cost of oil and gas purchased		0	(18)
Purchased oil and gas sales
Segment Reporting Information [Line Items]
Purchased oil and gas sales		239	349
Operating Expenses:
Cost of oil and gas purchased		216	351
Purchased oil and gas sales | Operating Segments | Egypt
Segment Reporting Information [Line Items]
Purchased oil and gas sales		0	0
Operating Expenses:
Cost of oil and gas purchased		0	0
Purchased oil and gas sales | Operating Segments | North Sea
Segment Reporting Information [Line Items]
Purchased oil and gas sales		0	0
Operating Expenses:
Cost of oil and gas purchased		0	0
Purchased oil and gas sales | Operating Segments | U.S.
Segment Reporting Information [Line Items]
Purchased oil and gas sales		239	344
Operating Expenses:
Cost of oil and gas purchased		216	351
Purchased oil and gas sales | Reportable Legal Entities | Altus Midstream
Segment Reporting Information [Line Items]
Purchased oil and gas sales		0	5
Operating Expenses:
Cost of oil and gas purchased		0	0
Purchased oil and gas sales | Intersegment Eliminations & Other
Segment Reporting Information [Line Items]
Purchased oil and gas sales		0	0
Operating Expenses:
Cost of oil and gas purchased		0	0
Midstream service affiliate revenues | Reportable Legal Entities | Altus Midstream
Segment Reporting Information [Line Items]
Purchased oil and gas sales			16
Midstream service affiliate revenues | Intersegment Eliminations & Other
Segment Reporting Information [Line Items]
Purchased oil and gas sales			(16)
Oil and gas
Segment Reporting Information [Line Items]
Revenues		1,945	2,669
Oil and gas | Operating Segments | Egypt
Segment Reporting Information [Line Items]
Revenues		722	891
Oil and gas | Operating Segments | North Sea
Segment Reporting Information [Line Items]
Revenues		352	443
Oil and gas | Operating Segments | U.S.
Segment Reporting Information [Line Items]
Revenues		871	1,333
Oil and gas | Reportable Legal Entities | Altus Midstream
Segment Reporting Information [Line Items]
Revenues		0	21
Oil and gas | Intersegment Eliminations & Other
Segment Reporting Information [Line Items]
Revenues		0	(19)
Oil revenues
Other Income (Expense):
Revenue from non-customers		172	250
Oil revenues | Oil and gas, excluding purchased
Segment Reporting Information [Line Items]
Oil, natural gas, and natural gas liquids production revenues		1,350	1,717
Oil revenues | Oil and gas, excluding purchased | Operating Segments | Egypt
Segment Reporting Information [Line Items]
Oil, natural gas, and natural gas liquids production revenues		629	790
Oil revenues | Oil and gas, excluding purchased | Operating Segments | North Sea
Segment Reporting Information [Line Items]
Oil, natural gas, and natural gas liquids production revenues		282	328
Oil revenues | Oil and gas, excluding purchased | Operating Segments | U.S.
Segment Reporting Information [Line Items]
Oil, natural gas, and natural gas liquids production revenues		439	599
Oil revenues | Oil and gas, excluding purchased | Reportable Legal Entities | Altus Midstream
Segment Reporting Information [Line Items]
Oil, natural gas, and natural gas liquids production revenues		0	0
Oil revenues | Oil and gas, excluding purchased | Intersegment Eliminations & Other
Segment Reporting Information [Line Items]
Oil, natural gas, and natural gas liquids production revenues		0	0
Natural gas revenues
Other Income (Expense):
Revenue from non-customers		26	31
Natural gas revenues | Oil and gas, excluding purchased
Segment Reporting Information [Line Items]
Oil, natural gas, and natural gas liquids production revenues		238	380
Natural gas revenues | Oil and gas, excluding purchased | Operating Segments | Egypt
Segment Reporting Information [Line Items]
Oil, natural gas, and natural gas liquids production revenues		93	98
Natural gas revenues | Oil and gas, excluding purchased | Operating Segments | North Sea
Segment Reporting Information [Line Items]
Oil, natural gas, and natural gas liquids production revenues		60	99
Natural gas revenues | Oil and gas, excluding purchased | Operating Segments | U.S.
Segment Reporting Information [Line Items]
Oil, natural gas, and natural gas liquids production revenues		85	183
Natural gas revenues | Oil and gas, excluding purchased | Reportable Legal Entities | Altus Midstream
Segment Reporting Information [Line Items]
Oil, natural gas, and natural gas liquids production revenues		0	0
Natural gas revenues | Oil and gas, excluding purchased | Intersegment Eliminations & Other
Segment Reporting Information [Line Items]
Oil, natural gas, and natural gas liquids production revenues		0	0
Natural gas liquids revenues
Other Income (Expense):
Revenue from non-customers		0	1
Natural gas liquids revenues | Oil and gas, excluding purchased
Segment Reporting Information [Line Items]
Oil, natural gas, and natural gas liquids production revenues		118	223
Natural gas liquids revenues | Oil and gas, excluding purchased | Operating Segments | Egypt
Segment Reporting Information [Line Items]
Oil, natural gas, and natural gas liquids production revenues		0	3
Natural gas liquids revenues | Oil and gas, excluding purchased | Operating Segments | North Sea
Segment Reporting Information [Line Items]
Oil, natural gas, and natural gas liquids production revenues		10	16
Natural gas liquids revenues | Oil and gas, excluding purchased | Operating Segments | U.S.
Segment Reporting Information [Line Items]
Oil, natural gas, and natural gas liquids production revenues		108	207
Natural gas liquids revenues | Oil and gas, excluding purchased | Reportable Legal Entities | Altus Midstream
Segment Reporting Information [Line Items]
Oil, natural gas, and natural gas liquids production revenues		0	0
Natural gas liquids revenues | Oil and gas, excluding purchased | Intersegment Eliminations & Other
Segment Reporting Information [Line Items]
Oil, natural gas, and natural gas liquids production revenues		$ 0	$ (3)

[1] For revenues and gathering, processing, and transmission costs associated with Kinetik, refer to Note 7—Equity Method Interests for further detail.