Revenue Recognition - Accounts Receivable (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Disaggregation of Revenue [Line Items]
Allowance for doubtful accounts	$ (30)	$ (21)
Total accounts receivable, net	746	990
Oil, natural gas and NGL sales
Disaggregation of Revenue [Line Items]
Accounts receivable, gross	589	737
Joint interest billings
Disaggregation of Revenue [Line Items]
Accounts receivable, gross	119	200
Other
Disaggregation of Revenue [Line Items]
Accounts receivable, gross	$ 68	$ 74

Amount, before allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business, classified as current.

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Amount, after allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business, classified as current.

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No definition available.

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