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
Mar. 31, 2018
Mar. 31, 2017
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Balance, beginning of period $ 43 $ 79
Realized and mark-to-market losses:    
Included in cost of sales (13) (41)
Purchases and settlements:    
Purchases 3 4
Settlements (23) (1)
Balance, end of period 10 41
Change in unrealized gains relating to instruments still held at end of period $ (13) $ (41)