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Revenue Recognition - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Disaggregation of Revenue [Line Items]
Customary payment terms	30 days
Customer advances	$ 700	$ 130
Point Lisas Nitrogen Limited (PLNL) | Operating equity method investments
Disaggregation of Revenue [Line Items]
Obligation to purchase ammonia (description)	50% of the ammonia produced by PLNL
Continuous Basis
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 92	$ 44	$ 55

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