Other Liabilities - Current Table (Details) - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
Other Liabilities Disclosure [Abstract]
Revenues and royalties due others	$ 235	$ 516
Accrued drilling and production costs	88	326
Debt and equity financing fees	69	0
Joint interest prepayments received	27	52
Operating leases	23	9
Accrued reorganization professional fees	23	0
VPP deferred revenue	22	55
Accrued compensation and benefits	61	156
Other accrued taxes	123	150
Other	82	168
Total other current liabilities	$ 753	$ 1,432