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) - Liquefaction Supply Derivatives [Member] - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Balance, beginning of period $ 10 $ 41 $ 43 $ 79
Realized and mark-to-market losses:        
Included in cost of sales (1) (1) (12) (40)
Purchases and settlements:        
Purchases 6 2 6 5
Settlements (4) (2) (25) (4)
Transfers out of Level 3 [1] 1 0 0 0
Balance, end of period 12 40 12 40
Change in unrealized gains relating to instruments still held at end of period $ (1) $ (1) $ (12) $ (40)
[1] Transferred to Level 2 as a result of observable market for the underlying natural gas purchase agreements.