Inventory (Details) - USD ($) $ in Millions	Sep. 30, 2017	Dec. 31, 2016
Inventory [Line Items]
Inventory	$ 133	$ 160
Natural gas [Member]
Inventory [Line Items]
Inventory	16	15
LNG [Member]
Inventory [Line Items]
Inventory	24	50
LNG in-transit [Member]
Inventory [Line Items]
Inventory	45	58
Materials and other [Member]
Inventory [Line Items]
Inventory	$ 48	$ 37