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Goodwill and Other Intangible Assets (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Goodwill
Goodwill, Beginning Balance			$ 2,374
Effect of exchange rate changes			1
Goodwill, Ending Balance	$ 2,116		2,116
Goodwill, Impairment Loss	(259)	$ 0	(259)	$ 0
U.K.
Goodwill
Goodwill, Ending Balance	26		26
Ammonia
Goodwill
Goodwill, Beginning Balance			587
Effect of exchange rate changes			0
Goodwill, Ending Balance	583		583
Goodwill, Impairment Loss			(4)
Ammonia | U.K.
Goodwill
Goodwill, Ending Balance	5		5
Granular Urea
Goodwill
Goodwill, Beginning Balance			828
Effect of exchange rate changes			0
Goodwill, Ending Balance	828		828
Goodwill, Impairment Loss			0
UAN
Goodwill
Goodwill, Beginning Balance			576
Effect of exchange rate changes			0
Goodwill, Ending Balance	576		576
Goodwill, Impairment Loss			0
AN
Goodwill
Goodwill, Beginning Balance			310
Effect of exchange rate changes			0
Goodwill, Ending Balance	77		77
Goodwill, Impairment Loss			(233)
AN | U.K.
Goodwill
Goodwill, Impairment Loss			(8)
Other
Goodwill
Goodwill, Beginning Balance			73
Effect of exchange rate changes			1
Goodwill, Ending Balance	$ 52		52
Goodwill, Impairment Loss			(22)
Other | U.K.
Goodwill
Goodwill, Impairment Loss			$ (13)

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Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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