Acquisitions, Divestitures, Decommissioning and Restructuring Activities - Narrative (Acquisitions) (Details) - USD ($) $ in Millions		12 Months Ended
	May 04, 2021	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Jan. 12, 2021
Business Acquisition [Line Items]
Shares issued or reissued for acquisitions		$ 11,116
Payments for undeveloped acreage		$ 58	$ 14	$ 28
DoublePoint Acquisition
Business Acquisition [Line Items]
Business acquisition, equity interest Issued or issuable, number of shares (in shares)	27,000,000
Payments to acquire businesses, gross	$ 1,000
Shares issued or reissued for acquisitions	4,200
Net assets acquired	$ 5,234
Parsley Acquisition
Business Acquisition [Line Items]
Exchange ratio					0.1252
Number of share issued from rights (in shares)					52,000,000
Net assets acquired					$ 6,883