Share-Based Compensation - Schedule of Compensation Expense (Details) - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2026	Mar. 31, 2025
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total RSU and PSU compensation	$ 15	$ 13
Related income tax benefit	4	4
General and administrative expenses
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total RSU and PSU compensation	9	8
Natural gas and oil properties
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total RSU and PSU compensation	2	1
Production expense
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total RSU and PSU compensation	1	1
Separation and other termination costs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total RSU and PSU compensation	3	0
Marketing expense
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total RSU and PSU compensation	0	1
Other operating expense, net
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total RSU and PSU compensation	$ 0	$ 2

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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+ Details