Quarterly report pursuant to Section 13 or 15(d)

Derivative Instruments - Schedule of Level 3 Derivatives Activity (Details)

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Derivative Instruments - Schedule of Level 3 Derivatives Activity (Details) - Physical Liquefaction Supply Derivatives [Member] - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Balance, beginning of period $ 40 $ 22 $ 79 $ 32
Realized and mark-to-market losses:        
Included in cost of sales (8) (11) (43) (20) [1]
Purchases and settlements:        
Purchases (1) 1 1 1
Settlements (2) 0 (8) (1) [1]
Balance, end of period 29 12 29 12
Change in unrealized gains relating to instruments still held at end of period $ (8) $ (11) $ (43) (20)
Decrease in Fair Value Realized and Capitalized During Period       $ 1
[1] Does not include the decrease in fair value of $1 million related to the realized gains capitalized during the nine months ended September 30, 2016.