Incentive Plans - Schedule of Compensation Expense for Each Type of Incentive Award (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	$ 123	$ 84	$ 119
Income tax benefit (provision)	(628)	61	(235)
Restricted stock - equity awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	44	49	79
Restricted stock - liability awards (a)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	17	12	19
Amount of liabilities attributable to liability awards included in accounts payable	9	7
Restricted stock - liability awards (a) \| Parsley Acquisition
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	33	0	0
Performance unit awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	27	21	19
Employee Stock Purchase Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	2	2	2
Income tax benefit
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Income tax benefit (provision)	$ 14	$ 7	$ 18

Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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