Accrued Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Accrued Liabilities, Current [Abstract]
Interest costs and related debt fees	$ 245	$ 293
Accrued natural gas purchases	576	460
LNG terminals and related pipeline costs	147	327
Compensation and benefits	123	115
Accrued LNG inventory	4	6
Other accrued liabilities	80	80
Total accrued liabilities	$ 1,175	$ 1,281