Debt - Schedule of Carrying Values and Estimated Fair Values of Debt Instruments (Details) - USD ($) $ in Millions |
Dec. 31, 2018 |
Dec. 31, 2017 |
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Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | |||||||||
Carrying Amount, Debt | $ 16,066 | $ 16,046 | |||||||
Senior notes [Member] | Carrying Amount [Member] | |||||||||
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | |||||||||
Carrying Amount, Debt | [1] | 15,275 | 14,166 | ||||||
Senior notes [Member] | Estimated Fair Value [Member] | |||||||||
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | |||||||||
Senior Notes, Estimated Fair Value | [1] | 15,672 | 15,485 | ||||||
2037 SPL Senior Notes [Member] | Carrying Amount [Member] | |||||||||
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | |||||||||
Carrying Amount, Debt | [2] | 791 | 790 | ||||||
2037 SPL Senior Notes [Member] | Estimated Fair Value [Member] | |||||||||
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | |||||||||
Senior Notes, Estimated Fair Value | [2] | 817 | 871 | ||||||
Credit facilities [Member] | Carrying Amount [Member] | |||||||||
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | |||||||||
Carrying Amount, Debt | [3] | 0 | 1,090 | ||||||
Credit facilities [Member] | Estimated Fair Value [Member] | |||||||||
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | |||||||||
Credit Facilities, Estimated Fair Value | [3] | $ 0 | $ 1,090 | ||||||
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