Share-Based Compensation - Compensation Expense (Details) - USD ($) $ in Millions	1 Months Ended	11 Months Ended	12 Months Ended
	Feb. 09, 2021	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total restricted stock, stock option, and PSU compensation	$ 3	$ 11	$ 22	$ 32
General and administrative expense
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total restricted stock, stock option, and PSU compensation	3	7	20	26
Oil and natural gas properties
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total restricted stock, stock option, and PSU compensation	0	2	1	2
Oil, natural gas and NGL production expense
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total restricted stock, stock option, and PSU compensation	0	2	1	3
Exploration expense
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total restricted stock, stock option, and PSU compensation	$ 0	$ 0	$ 0	$ 1