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Impairments - Before Tax Impairment Charges (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2021 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Segment Reporting Information [Line Items] |  |  |  |
Impairments |  | $ (12) | $ 674 | $ 813
Alaska | Operating Segments |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Impairments |  | 2 | 5 | 0
Lower 48 |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Impairments |  |  | (89) |
Lower 48 | Operating Segments |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Impairments | $ 84 | (11) | (8) | 804
Canada | Operating Segments |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Impairments |  | (2) | 6 | 3
Europe, Middle East and North Africa | Operating Segments |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Impairments |  | (1) | (24) | 6
Asia Pacific | Operating Segments |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Impairments |  | $ 0 | $ 695 | $ 0

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- Definition Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3602-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 45 -Paragraph 4 -URI https://asc.fasb.org/extlink&oid=126905981&loc=d3e2420-110228 + Details
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