Fair Value Measurements - Narrative (Details) $ in Millions	1 Months Ended		12 Months Ended
	Jul. 31, 2020 USD ($)	May 31, 2020	Dec. 31, 2021 USD ($) bblPerDay $ / bbl	Dec. 31, 2020 USD ($) $ / bbl	Dec. 31, 2019 USD ($)	May 31, 2019
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Purchase contract, amount of barrel to be purchased and sold | bblPerDay			50,000
Long-term purchase commitment, period			6 years
Disposal group, contingent consideration received	$ 49
Contingent consideration, valuation adjustment			$ 0	$ (42)	$ (45)
South Texas deficiency fee obligation, net			(10)	80	0
Increase (decrease) in deficiency fee receivable			(4)
Unproved Properties
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impairment of oil and gas properties			4	11	4
South Texas Divestiture
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contingent consideration period		5 years
Increase (decrease) in deficiency fee obligation			(3)	84
South Texas deficiency fee obligation, net				84
Increase (decrease) in deficiency fee receivable			$ (7)	$ (4)
Sand mine
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impairment of long-lived assets to be disposed of					13
Pressure pumping assets
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impairment of long-lived assets to be disposed of					$ 16
Marketing derivatives
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative, fair value input, WASP differential deduction | $ / bbl			2.19	1.91
Annual discount rate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contingent consideration, cash payment, measurement input						3.60%
Contingent consideration, cash receipt, measurement input						3.20%