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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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