Inventory (Details) - USD ($) $ in Millions  | 
Mar. 31, 2018  | 
Dec. 31, 2017  | 
|---|---|---|
| Inventory [Line Items] | ||
| Inventory | $ 123 | $ 243 | 
| Natural gas [Member] | ||
| Inventory [Line Items] | ||
| Inventory | 16 | 17 | 
| LNG [Member] | ||
| Inventory [Line Items] | ||
| Inventory | 24 | 44 | 
| LNG in-transit [Member] | ||
| Inventory [Line Items] | ||
| Inventory | 30 | 130 | 
| Materials and other [Member] | ||
| Inventory [Line Items] | ||
| Inventory | $ 53 | $ 52 | 
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available. 
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- Definition Amount after valuation and LIFO reserves of inventory expected to be sold, or consumed within one year or operating cycle, if longer. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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