Inventory (Details) - USD ($) $ in Millions	Sep. 30, 2021	Dec. 31, 2020
Inventory [Line Items]
Inventory	$ 471	$ 292
Materials [Member]
Inventory [Line Items]
Inventory	168	150
LNG in-transit [Member]
Inventory [Line Items]
Inventory	145	88
LNG [Member]
Inventory [Line Items]
Inventory	125	27
Natural gas [Member]
Inventory [Line Items]
Inventory	31	26
Other [Member]
Inventory [Line Items]
Inventory	$ 2	$ 1