Acquisitions and Divestitures (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Business Combination, Separately Recognized Transactions [Line Items]
Gains (Losses) on Asset Dispositions, Net	$ 17	$ (47)	$ 124
Proceeds from Sale of Oil and Gas Properties and Equipment	231	192	140
Book value of asset retirement obligations	105
Held-for-sale
Business Combination, Separately Recognized Transactions [Line Items]
Book value of assets held-for-sale	99
United States
Business Combination, Separately Recognized Transactions [Line Items]
Payments to Acquire Oil and Gas Property	$ 95	82	$ 328
Other International
Business Combination, Separately Recognized Transactions [Line Items]
Payments to Acquire Oil and Gas Property		$ 38

Book Value Liabilities Measured On Recurring Basis Obligations

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Amount classified as assets attributable to disposal group held for sale or disposed of.

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