Inventory (Details) - USD ($) $ in Millions	Mar. 31, 2021	Dec. 31, 2020
Inventory [Line Items]
Inventory	$ 314	$ 292
Materials [Member]
Inventory [Line Items]
Inventory	158	150
LNG in-transit [Member]
Inventory [Line Items]
Inventory	94	88
LNG [Member]
Inventory [Line Items]
Inventory	42	27
Natural gas [Member]
Inventory [Line Items]
Inventory	18	26
Other [Member]
Inventory [Line Items]
Inventory	$ 2	$ 1