| Debt - Convertible Notes Table (Details) | 1 Months Ended | 12 Months Ended | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Jul. 31, 2020  USD ($) | Dec. 31, 2020  USD ($)  $ / shares | Dec. 31, 2019  USD ($) | Dec. 31, 2018  USD ($) | ||||||||||
| Debt Instrument [Line Items] | |||||||||||||
| Interest paid-in-kind | $ 51,000,000 | $ 143,000,000 | $ 74,000,000 | ||||||||||
| Long Term Portion of Current Convertible Debt | [1] | 372,000,000 | |||||||||||
| 2021 Cheniere Convertible Unsecured Notes [Member] | |||||||||||||
| Debt Instrument [Line Items] | |||||||||||||
| Aggregate original principal | [2] | 1,000,000,000 | |||||||||||
| Interest paid-in-kind | [2] | 320,000,000 | |||||||||||
| Aggregate principal redeemed | $ (844,000,000) | (844,000,000) | [2] | ||||||||||
| Aggregate Remaining Principal, Convertible Debt | [2] | 476,000,000 | |||||||||||
| Debt component, net of discount and debt issuance costs | [2] | 470,000,000 | |||||||||||
| Equity component | [2] | 201,000,000 | |||||||||||
| Conversion value in excess of principal | [2] | $ 0 | |||||||||||
| Maturity date | [2] | May 28, 2021 | |||||||||||
| Contractual interest rate | [2] | 4.875% | |||||||||||
| Effective interest rate | [2],[3] | 8.10% | |||||||||||
| Remaining debt discount and debt issuance costs amortization period | [2],[4] | 4 months 24 days | |||||||||||
| Debt Instrument, Convertible, Conversion Price | $ / shares | $ 93.64 | ||||||||||||
| 2045 Cheniere Convertible Senior Notes [Member] | |||||||||||||
| Debt Instrument [Line Items] | |||||||||||||
| Aggregate original principal | $ 625,000,000 | ||||||||||||
| Interest paid-in-kind | 0 | ||||||||||||
| Aggregate principal redeemed | 0 | ||||||||||||
| Aggregate Remaining Principal, Convertible Debt | 625,000,000 | ||||||||||||
| Debt component, net of discount and debt issuance costs | 317,000,000 | ||||||||||||
| Equity component | 194,000,000 | ||||||||||||
| Conversion value in excess of principal | $ 0 | ||||||||||||
| Maturity date | Mar. 15, 2045 | ||||||||||||
| Contractual interest rate | 4.25% | ||||||||||||
| Effective interest rate | [3] | 9.40% | |||||||||||
| Remaining debt discount and debt issuance costs amortization period | [4] | 24 years 2 months 12 days | |||||||||||
| Debt Instrument, Convertible, Conversion Price | $ / shares | $ 138.38 | ||||||||||||
| Debt Instrument, Convertible, Conversion Ratio | 7.2265 | ||||||||||||
| 
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