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Revenue - Summary of Deferred Revenue Activity (Details)
$ in Millions
 12 Months Ended
Dec. 31, 2021
USD ($)
Change in Contract with Customer, Liability [Roll Forward]  
Balance at December 31, 2020 $ 31
Less:  
Balance at December 31, 2021 87
Nitrogen Fertilizer Segment  
Change in Contract with Customer, Liability [Roll Forward]  
Balance at December 31, 2020 31
Add:  
New prepay contracts entered into during the period 147
Less:  
Revenue recognized that was included in the contract liability balance at the beginning of the period (30)
Revenue recognized related to contracts entered into during the period (60)
Other changes (1)
Balance at December 31, 2021 87
Prepaid contracts, payment collected $ 94