Other Current Liabilities (Details) - USD ($) $ in Millions	Mar. 31, 2021	Dec. 31, 2020
Other Liabilities Disclosure [Abstract]
Revenues and royalties due others	$ 418	$ 236
Accrued drilling and production costs	71	104
Other accrued taxes	60	82
Accrued compensation and benefits	39	59
Operating leases	27	24
Debt and equity financing fees	0	69
Joint interest prepayments received	18	8
Other	148	141
Total other current liabilities	$ 781	$ 723