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Business Segments - Summary of Operating Results and Capital Expenditures by Segment (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Dec. 31, 2021
Segment Reporting Information [Line Items]      
Net sales $ 2,373 $ 1,463  
Operating income (loss): 220 (135)  
Interest expense, net (24) (31)  
Investment income on marketable securities 0 62  
Other (expense) income, net (9) 7  
Income (loss) before income tax expense 187 (97)  
Depreciation and amortization 67 66  
Capital expenditures 50 68  
Total assets 4,345   $ 3,906
Operating Segments | Petroleum      
Segment Reporting Information [Line Items]      
Net sales 2,154 1,404  
Operating income (loss): 130 (115)  
Depreciation and amortization 46 51  
Capital expenditures 19 10  
Total assets 3,874   3,368
Operating Segments | Nitrogen Fertilizer      
Segment Reporting Information [Line Items]      
Net sales 223 61  
Operating income (loss): 104 (14)  
Depreciation and amortization 19 14  
Capital expenditures 5 3  
Total assets 1,103   1,127
Other, including intersegment eliminations      
Segment Reporting Information [Line Items]      
Net sales (4) (2)  
Operating income (loss): (14) (6)  
Depreciation and amortization 2 1  
Capital expenditures 26 $ 55  
Total assets $ (632)   $ (589)