Acquisitions - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2021	Oct. 01, 2021
Significant Acquisitions and Disposals
Additions related to merger integration	$ 44
Employee Severance
Significant Acquisitions and Disposals
Additions related to merger integration	$ 44
Cimarex
Significant Acquisitions and Disposals
Issued restricted stock award	3,400,000
Transaction costs	$ 42
Cimarex \| Common Shares
Significant Acquisitions and Disposals
Right to receive (in shares)		4.0146
Value of shares issued		$ 9,083

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