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Equity Method Investments and Variable Interest Entities (Narrative) (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020
Schedule of Equity Method Investments [Line Items] |  |  |  |
Equity in earnings (losses) of unconsolidated affiliates | $ (186) | $ 16 | $ (174) | $ 17
Sustainable Technology Solutions |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |
Equity in earnings (losses) of unconsolidated affiliates | (194) | $ 9 | (189) | 5
JKC joint venture (Ichthys LNG project) | Sustainable Technology Solutions |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |
Equity in earnings (losses) of unconsolidated affiliates | $ (193) |  | (193) |
Transactions with Related Parties |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |
Revenue from related parties |  |  | $ 194 | $ 276

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