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Impairments - Before Tax Impairment Charges (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Segment Reporting Information [Line Items]
Impairments		$ 14	$ (12)	$ 674
Corporate and Other
Segment Reporting Information [Line Items]
Impairments		1	0	0
Alaska | Operating Segments
Segment Reporting Information [Line Items]
Impairments		0	2	5
Lower 48
Segment Reporting Information [Line Items]
Impairments				(89)
Lower 48 | Operating Segments
Segment Reporting Information [Line Items]
Impairments	$ 84	7	(11)	(8)
Canada | Operating Segments
Segment Reporting Information [Line Items]
Impairments		6	(2)	6
Europe, Middle East and North Africa | Operating Segments
Segment Reporting Information [Line Items]
Impairments		0	(1)	(24)
Asia Pacific | Operating Segments
Segment Reporting Information [Line Items]
Impairments		$ 0	$ 0	$ 695

X

- 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
-Name Accounting Standards Codification
-Section 45
-Paragraph 28
-Subparagraph (b)
-SubTopic 10
-Topic 230
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482740/230-10-45-28

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 45
-Paragraph 4
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482130/360-10-45-4

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- Definition

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+ References

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