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Equity Method Investments (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Equity method investments      
Liability (refund) adjustment from settlement with taxing authority $ (110)    
Operating equity method investments | Point Lisas Nitrogen Limited (PLNL)      
Equity method investments      
Ownership interest (as a percent) 50.00%    
Equity Method Investments $ 82    
Carrying value of investments in excess of the entity's share of the affiliates' book value $ 39    
Obligation to purchase ammonia (description) 50% of the ammonia produced by PLNL    
Unrecorded Unconditional Purchase Obligation, Purchases $ 150 $ 57 $ 69
The Board of Inland Revenue | Operating equity method investments | Point Lisas Nitrogen Limited (PLNL)      
Equity method investments      
Liability (refund) adjustment from settlement with taxing authority     16
Point Lisas Nitrogen Limited (PLNL) | The Board of Inland Revenue      
Equity method investments      
Liability (refund) adjustment from settlement with taxing authority     $ 32
Property, plant and equipment | Maximum | Operating equity method investments      
Equity method investments      
Finite Lived Tangible and Intangible Assets Revaluation Increased Basis Depreciation Period 11 years