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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	12 Months Ended
	Sep. 30, 2021	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance at January 1,		$ 881
Equity in earnings (losses) of unconsolidated affiliates		(170)	$ 30	$ 35
Distributions of earnings of unconsolidated affiliates		(47)	(38)	(69)
Investments		29	26	146
Balance at December 31,		576	881
Amount allocated to fund ownership venture			24
Sustainable Technology Solutions
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance at January 1,		736
Equity in earnings (losses) of unconsolidated affiliates		(199)	2	6
Impairment of equity method investments			(6)
Balance at December 31,		450	736
Impairment of equity method investments			6
Ebic Ammonia Project
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Impairment of equity method investments			(13)
Sale of equity method investment	$ (39)
Impairment of equity method investments			13
Equity method investment	39
Cash proceeds	43
Gain on disposal	4
Payment of proportionate share of sale of equity method investment to noncontrolling interest	15
Ebic Ammonia Project | NCI
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Portion of gain attributable to noncontrolling interest	$ 1
Equity Method Investments
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Beginning balance at January 1,		881	846
Equity in earnings (losses) of unconsolidated affiliates		(170)	30
Distributions of earnings of unconsolidated affiliates		(72)	(38)
Advances to (payments from) unconsolidated affiliates, net		(17)	(15)
Investments		29	26
Impairment of equity method investments		0	(19)
Sale of equity method investment		(39)	0
Foreign currency translation adjustments		(10)	50
Other		(26)	1
Balance at December 31,		576	881	$ 846
Amount allocated to fund ownership venture		26
Impairment of equity method investments		0	19
Equity method investment		$ 39	$ 0

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