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Equity Method Investments and Variable Interest Entities (Schedule of Equity in Earnings of Unconsolidated Affiliates) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
Equity Method Investment [Roll Forward]
Beginning balance at January 1,			$ 881
Equity in earnings (losses) of unconsolidated affiliates	$ (186)	$ 16	(174)	$ 17
Distributions of earnings of unconsolidated affiliates			(26)	(15)
Investments			7	12
Ending balance	662		662		$ 881
Sustainable Technology Solutions
Equity Method Investment [Roll Forward]
Equity in earnings (losses) of unconsolidated affiliates	(194)	$ 9	(189)	5
Impairment of equity method investments					(6)
Impairment of equity method investments					6
Sustainable Technology Solutions | JKC joint venture (Ichthys LNG project)
Equity Method Investment [Roll Forward]
Equity in earnings (losses) of unconsolidated affiliates	(193)		(193)
EBIC Ammonia Project
Equity Method Investment [Roll Forward]
Impairment of equity method investments					(13)
Impairment of equity method investments					13
Equity Method Investments
Equity Method Investment [Roll Forward]
Beginning balance at January 1,			881	$ 846	846
Equity in earnings (losses) of unconsolidated affiliates			(174)		30
Distributions of earnings of unconsolidated affiliates			(26)		(38)
Advances to (payments from) unconsolidated affiliates, net			(10)		(15)
Investments			7		26
Impairment of equity method investments			0		(19)
Foreign currency translation adjustments			(23)		50
Other			7		1
Ending balance	$ 662		662		881
Amount allocated to fund ownership venture			7		24
Impairment of equity method investments			$ 0		$ 19

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