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Business Segments - Summary of Operating Results and Capital Expenditures by Segment (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
Dec. 31, 2021
Segment Reporting Information [Line Items]          
Net sales $ 3,144 $ 1,783 $ 5,517 $ 3,246  
Operating income (loss): 402 6 623 (129)  
Interest expense, net (23) (38) (48) (69)  
Investment income on marketable securities 0 21 0 83  
Other (expense) income, net (74) 3 (84) 10  
Income (loss) before income tax expense 305 (8) 491 (105)  
Depreciation and amortization 73 72 140 138  
Capital expenditures 41 83 91 151  
Total assets 4,671   4,671   $ 3,906
Operating Segments | Petroleum Segment          
Segment Reporting Information [Line Items]          
Net sales 2,868 1,648 5,022 3,052  
Operating income (loss): 297 (20) 427 (136)  
Depreciation and amortization 46 51 93 102  
Capital expenditures 19 9 38 19  
Total assets 4,280   4,280   3,368
Operating Segments | Nitrogen Fertilizer Segment          
Segment Reporting Information [Line Items]          
Net sales 244 138 467 199  
Operating income (loss): 126 30 230 16  
Depreciation and amortization 21 21 42 35  
Capital expenditures 9 4 14 7  
Total assets 1,119   1,119   1,127
Other, including intersegment eliminations (1)          
Segment Reporting Information [Line Items]          
Net sales 32 (3) 28 (5)  
Operating income (loss): (21) (4) (34) (9)  
Depreciation and amortization 6 0 5 1  
Capital expenditures 13 $ 70 39 $ 125  
Total assets $ (728)   $ (728)   $ (589)