Share-Based Compensation - Compensation Expense (Details) - USD ($) $ in Millions	1 Months Ended	3 Months Ended		5 Months Ended	6 Months Ended
	Feb. 09, 2021	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2021	Jun. 30, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense	$ 3	$ 8	$ 3	$ 3	$ 12
General and administrative expenses
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense	3	6	2	2	9
Natural gas and oil properties
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense	0	1	1	1	2
Production expense
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense	$ 0	$ 1	$ 0	$ 0	$ 1