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Business Segments - Summary of Operating Results, Capital Expenditures, and Total Asset Information by Segment (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Segment Reporting Information [Line Items]      
Total sales $ 9,247 $ 10,896 $ 7,242
Operating income (loss) 1,123 963 87
Interest income (expense) (52) (85) (117)
Investment income on marketable securities 0 0 81
Other income (expense), net 14 (77) 15
Income before income tax expense 1,085 801 66
Depreciation and amortization 298 288 279
Capital expenditures 197 203 226
Assets 4,707 4,119  
Petroleum Segment      
Segment Reporting Information [Line Items]      
Total sales 8,267 9,902 6,710
Nitrogen Fertilizer Segment      
Segment Reporting Information [Line Items]      
Total sales 681 836 533
Operating Segments | Petroleum Segment      
Segment Reporting Information [Line Items]      
Total sales 8,287 9,919 6,721
Operating income (loss) 982 719 (27)
Interest income (expense) 75 41 21
Depreciation and amortization 189 187 203
Capital expenditures 108 86 50
Assets 2,978 4,354  
Operating Segments | Nitrogen Fertilizer Segment      
Segment Reporting Information [Line Items]      
Total sales 681 836 533
Operating income (loss) 201 320 134
Interest income (expense) (29) (34) (61)
Depreciation and amortization 80 82 73
Capital expenditures 29 41 26
Assets 975 1,100  
Corporate And Eliminations      
Segment Reporting Information [Line Items]      
Total sales 279 141 (12)
Capital expenditures 60    
Assets 754 (1,335)  
Inter-segment fees and sales      
Segment Reporting Information [Line Items]      
Total sales (20) (17) (11)
Inter-segment fees and sales | Petroleum Segment      
Segment Reporting Information [Line Items]      
Total sales (20) (17) (11)
Inter-segment fees and sales | Nitrogen Fertilizer Segment      
Segment Reporting Information [Line Items]      
Total sales 0 0 0
Other/Eliminations      
Segment Reporting Information [Line Items]      
Total sales 299 158 (1)
Operating income (loss) (60) (76) (20)
Interest income (expense) (98) (92) (77)
Depreciation and amortization $ 29 19 3
Capital expenditures   $ 76 $ 150