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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, 2023
Jun. 30, 2022
Jun. 30, 2023
Jun. 30, 2022
Dec. 31, 2022
Segment Reporting Information [Line Items]          
Net sales $ 2,236 $ 3,144 $ 4,523 $ 5,517  
Operating income (loss): 224 402 554 623  
Interest expense, net (16) (23) (32) (48)  
Other income (expense), net 4 (74) 6 (84)  
Income before income tax expense 212 305 528 491  
Depreciation and amortization 72 73 141 140  
Capital expenditures 48 41 97 91  
Total assets 4,217   4,217   $ 4,119
Operating Segments | Petroleum          
Segment Reporting Information [Line Items]          
Net sales 2,000 2,868 3,993 5,022  
Operating income (loss): 171 297 408 427  
Depreciation and amortization 45 46 91 93  
Capital expenditures 22 19 53 38  
Total assets 4,260   4,260   4,354
Operating Segments | Nitrogen Fertilizer Segment          
Segment Reporting Information [Line Items]          
Net sales 183 244 409 467  
Operating income (loss): 67 126 176 230  
Depreciation and amortization 20 21 35 42  
Capital expenditures 6 9 10 14  
Total assets 1,019   1,019   1,100
Other, including intersegment eliminations          
Segment Reporting Information [Line Items]          
Net sales 53 32 121 28  
Operating income (loss): (14) (21) (30) (34)  
Depreciation and amortization 7 6 15 5  
Capital expenditures 20 $ 13 34 $ 39  
Total assets $ (1,062)   $ (1,062)   $ (1,335)