Other Liabilities - Current Table (Details) - USD ($) $ in Millions	Jun. 30, 2019	Dec. 31, 2018
Other Liabilities Disclosure [Abstract]
Revenues and royalties due others	$ 434	$ 687
Accrued drilling and production costs	441	258
Joint interest prepayments received	60	73
VPP deferred revenue	57	59
Accrued compensation and benefits	133	202
Other accrued taxes	126	108
Other	179	212
Total other current liabilities	$ 1,430	$ 1,599