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BUSINESS SEGMENT INFORMATION - Financial Segment Information (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Operating Expenses:      
Lease operating expenses $ 1,444 $ 1,241 $ 1,127
Taxes other than income 268 204 123
Exploration 305 155 274
Depreciation, depletion, and amortization 1,233 1,360 1,772
Asset retirement obligation accretion 117 113 109
Impairments 0 208 4,501
Total operating expenses 5,510 5,125 8,537
Operating Income (Loss) 5,565 2,860 (4,102)
Other Income (Expense):      
Gain on divestitures, net 1,180 67 32
Losses on previously sold Gulf of Mexico properties (157) (446) 0
Derivative instrument gains (losses), net (114) 94 (223)
Other 148 228 64
General and administrative (483) (376) (290)
Transaction, reorganization, and separation (26) (22) (54)
Financing costs, net (379) (514) (267)
NET INCOME (LOSS) BEFORE INCOME TAXES 5,734 1,891 (4,840)
Total assets 13,147 [1] 13,303 [1] 12,746
Net Property and Equipment 9,012 [1] 8,335 [1] 8,819
Additions to Net Property and Equipment 2,607 1,155 1,162
Operating Segments | Egypt      
Operating Expenses:      
Lease operating expenses 526 469 424
Taxes other than income 0 0 0
Exploration 84 63 63
Depreciation, depletion, and amortization 400 524 601
Asset retirement obligation accretion 0 0 0
Impairments   26 529
Total operating expenses 1,032 1,094 1,655
Operating Income (Loss) 2,489 991 (265)
Other Income (Expense):      
Total assets 3,148 2,796 3,003
Net Property and Equipment 1,976 1,720 1,955
Additions to Net Property and Equipment 695 319 454
Operating Segments | North Sea      
Operating Expenses:      
Lease operating expenses 404 383 305
Taxes other than income 0 0 0
Exploration 35 34 28
Depreciation, depletion, and amortization 238 270 380
Asset retirement obligation accretion 82 79 73
Impairments   22 7
Total operating expenses 802 827 843
Operating Income (Loss) 756 309 40
Other Income (Expense):      
Total assets 1,911 2,199 2,220
Net Property and Equipment 1,386 1,646 1,773
Additions to Net Property and Equipment 210 159 215
Operating Segments | U.S.      
Operating Expenses:      
Lease operating expenses 515 391 400
Taxes other than income 265 190 108
Exploration 24 28 168
Depreciation, depletion, and amortization 593 554 779
Asset retirement obligation accretion 34 30 32
Impairments   0 3,963
Total operating expenses 3,522 3,077 6,095
Operating Income (Loss) 2,472 1,679 (3,937)
Other Income (Expense):      
Total assets 7,574 6,269 5,540
Net Property and Equipment 5,226 4,507 4,760
Additions to Net Property and Equipment 1,439 523 345
Reportable Legal Entities | Altus Midstream      
Segment Reporting Information [Line Items]      
Revenue from contract with customer, including assessed tax 16 127 145
Operating Expenses:      
Lease operating expenses 0 0 0
Taxes other than income 3 14 15
Exploration 0 0 0
Depreciation, depletion, and amortization 2 12 12
Asset retirement obligation accretion 1 4 4
Impairments   160 2
Total operating expenses 11 227 74
Operating Income (Loss) 10 (89) 75
Other Income (Expense):      
Total assets 0 1,698 1,786
Net Property and Equipment 0 187 196
Additions to Net Property and Equipment 0 3 12
Intersegment Eliminations & Other      
Segment Reporting Information [Line Items]      
Revenue from contract with customer, including assessed tax (16) (127) (145)
Operating Expenses:      
Lease operating expenses (1) (2) (2)
Taxes other than income 0 0 0
Exploration 162 30 15
Depreciation, depletion, and amortization 0 0 0
Asset retirement obligation accretion 0 0 0
Impairments   0 0
Total operating expenses 143 (100) (130)
Operating Income (Loss) (162) (30) (15)
Other Income (Expense):      
Total assets 514 341 197
Net Property and Equipment 424 275 135
Additions to Net Property and Equipment 263 151 136
Oil and gas, excluding purchased      
Segment Reporting Information [Line Items]      
Oil, natural gas, and natural gas liquids production revenues [2] 9,220 6,498 4,037
Operating Expenses:      
Cost of oil and gas purchased [2] 367 264 274
Oil and gas, excluding purchased | Operating Segments | Egypt      
Segment Reporting Information [Line Items]      
Oil, natural gas, and natural gas liquids production revenues 3,521 2,085 1,390
Operating Expenses:      
Cost of oil and gas purchased 22 12 38
Oil and gas, excluding purchased | Operating Segments | North Sea      
Segment Reporting Information [Line Items]      
Oil, natural gas, and natural gas liquids production revenues 1,558 1,136 883
Operating Expenses:      
Cost of oil and gas purchased 43 39 50
Oil and gas, excluding purchased | Operating Segments | U.S.      
Segment Reporting Information [Line Items]      
Oil, natural gas, and natural gas liquids production revenues 4,144 3,280 1,764
Operating Expenses:      
Cost of oil and gas purchased 315 309 291
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 0
Operating Expenses:      
Cost of oil and gas purchased 5 32 38
Oil and gas, excluding purchased | Intersegment Eliminations & Other      
Segment Reporting Information [Line Items]      
Oil, natural gas, and natural gas liquids production revenues (3) (3)  
Operating Expenses:      
Cost of oil and gas purchased (18) (128) (143)
Oil and gas, purchased      
Segment Reporting Information [Line Items]      
Revenue from contract with customer, including assessed tax 1,855 1,487 398
Operating Expenses:      
Cost of oil and gas purchased 1,776 1,580 357
Oil and gas, purchased | Operating Segments | Egypt      
Segment Reporting Information [Line Items]      
Revenue from contract with customer, including assessed tax 0 0 0
Operating Expenses:      
Cost of oil and gas purchased 0 0 0
Oil and gas, purchased | Operating Segments | North Sea      
Segment Reporting Information [Line Items]      
Revenue from contract with customer, including assessed tax 0 0 0
Operating Expenses:      
Cost of oil and gas purchased 0 0 0
Oil and gas, purchased | Operating Segments | U.S.      
Segment Reporting Information [Line Items]      
Revenue from contract with customer, including assessed tax 1,850 1,476 394
Operating Expenses:      
Cost of oil and gas purchased 1,776 1,575 354
Oil and gas, purchased | Reportable Legal Entities | Altus Midstream      
Segment Reporting Information [Line Items]      
Revenue from contract with customer, including assessed tax 5 11 4
Operating Expenses:      
Cost of oil and gas purchased 0 5 3
Oil and gas, purchased | Intersegment Eliminations & Other      
Segment Reporting Information [Line Items]      
Revenue from contract with customer, including assessed tax 0 0 0
Operating Expenses:      
Cost of oil and gas purchased 0 0 0
Oil and gas      
Segment Reporting Information [Line Items]      
Revenues 11,075 7,985 4,435
Oil and gas | Operating Segments | Egypt      
Segment Reporting Information [Line Items]      
Revenues 3,521 2,085 1,390
Oil and gas | Operating Segments | North Sea      
Segment Reporting Information [Line Items]      
Revenues 1,558 1,136 883
Oil and gas | Operating Segments | U.S.      
Segment Reporting Information [Line Items]      
Revenues 5,994 4,756 2,158
Oil and gas | Reportable Legal Entities | Altus Midstream      
Segment Reporting Information [Line Items]      
Revenues 21 138 149
Oil and gas | Intersegment Eliminations & Other      
Segment Reporting Information [Line Items]      
Revenues (19) (130) (145)
Oil revenues      
Other Income (Expense):      
Revenue from non-customers 989 420 95
Oil revenues | Oil and gas, excluding purchased      
Segment Reporting Information [Line Items]      
Oil, natural gas, and natural gas liquids production revenues 6,835 4,585 3,106
Oil revenues | Oil and gas, excluding purchased | Operating Segments | Egypt      
Segment Reporting Information [Line Items]      
Oil, natural gas, and natural gas liquids production revenues 3,145 1,806 1,102
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 1,232 929 795
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 2,458 1,850 1,209
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 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 0
Natural Gas      
Other Income (Expense):      
Revenue from non-customers 117 47 14
Natural Gas | Oil and gas, excluding purchased      
Segment Reporting Information [Line Items]      
Oil, natural gas, and natural gas liquids production revenues 1,569 1,207 598
Natural Gas | Oil and gas, excluding purchased | Operating Segments | Egypt      
Segment Reporting Information [Line Items]      
Oil, natural gas, and natural gas liquids production revenues 370 270 280
Natural Gas | Oil and gas, excluding purchased | Operating Segments | North Sea      
Segment Reporting Information [Line Items]      
Oil, natural gas, and natural gas liquids production revenues 281 183 67
Natural Gas | Oil and gas, excluding purchased | Operating Segments | U.S.      
Segment Reporting Information [Line Items]      
Oil, natural gas, and natural gas liquids production revenues 918 754 251
Natural Gas | 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 0
Natural Gas | Oil and gas, excluding purchased | Intersegment Eliminations & Other      
Segment Reporting Information [Line Items]      
Oil, natural gas, and natural gas liquids production revenues 0 0 0
Natural Gas Liquids      
Other Income (Expense):      
Revenue from non-customers 2 2 0
Natural Gas Liquids | Oil and gas, excluding purchased      
Segment Reporting Information [Line Items]      
Oil, natural gas, and natural gas liquids production revenues 816 706 333
Natural Gas Liquids | Oil and gas, excluding purchased | Operating Segments | Egypt      
Segment Reporting Information [Line Items]      
Oil, natural gas, and natural gas liquids production revenues 6 9 8
Natural Gas Liquids | Oil and gas, excluding purchased | Operating Segments | North Sea      
Segment Reporting Information [Line Items]      
Oil, natural gas, and natural gas liquids production revenues 45 24 21
Natural Gas Liquids | Oil and gas, excluding purchased | Operating Segments | U.S.      
Segment Reporting Information [Line Items]      
Oil, natural gas, and natural gas liquids production revenues 768 676 304
Natural Gas Liquids | 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 0
Natural Gas Liquids | Oil and gas, excluding purchased | Intersegment Eliminations & Other      
Segment Reporting Information [Line Items]      
Oil, natural gas, and natural gas liquids production revenues $ (3) $ (3) $ 0
[1] (1)    The Altus VIE amounts are disclosed as of December 31, 2021. All Altus balances were deconsolidated as of February 22, 2022. Refer to Note 1—Summary of Significant Accounting Policies and Note 2—Acquisitions and Divestitures for further detail.
[2] (1) For revenues and gathering, processing, and transmission costs associated with Kinetik, refer to Note 6—Equity Method Interest for further detail.