Inventory (Details) - USD ($) $ in Millions  | 
Jun. 30, 2021  | 
Dec. 31, 2020  | 
|---|---|---|
| Inventory [Line Items] | ||
| Inventory | $ 363 | $ 292 | 
| Materials [Member] | ||
| Inventory [Line Items] | ||
| Inventory | 162 | 150 | 
| LNG in-transit [Member] | ||
| Inventory [Line Items] | ||
| Inventory | 102 | 88 | 
| LNG [Member] | ||
| Inventory [Line Items] | ||
| Inventory | 61 | 27 | 
| Natural gas [Member] | ||
| Inventory [Line Items] | ||
| Inventory | 36 | 26 | 
| Other [Member] | ||
| Inventory [Line Items] | ||
| Inventory | $ 2 | $ 1 | 
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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://fasb.org/us-gaap/role/ref/legacyRef 
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