v3.26.1
Business Segments - Schedule of Operating Results and Capital Expenditures Information by Segment (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Mar. 31, 2026
Jun. 30, 2025
Mar. 31, 2025
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Segment Reporting [Line Items]              
Net sales $ 2,738   $ 1,761   $ 4,718 $ 3,407  
Cost of materials and other 2,370   1,582   4,195 3,099  
Direct operating expenses (exclusive of depreciation and amortization) 174   169   355 324  
Selling, general and administrative expenses (exclusive of depreciation and amortization) 34   36   73 73  
Depreciation and amortization         159 146  
Operating income (loss) 78   (103)   (67) (235)  
Reconciliation of Operating income (loss) to Net income:              
Interest income (expense), net (25)   (30)   (83) (55)  
Other income, net 3   1   17 4  
Income tax (expense) benefit (10)   42   19 91  
Net income (loss) 46 $ (160) (90) $ (105) (114) (195)  
Other segment disclosures:              
Capital expenditures 46   36   90 92  
Assets 4,079       4,079   $ 3,706
Product Sales, Excluding Renewable Fuel Activity              
Segment Reporting [Line Items]              
Net sales 2,738   1,726   4,718 3,343  
Petroleum Segment | Product Sales, Excluding Renewable Fuel Activity              
Segment Reporting [Line Items]              
Net sales 2,536   1,558   4,336 3,033  
Nitrogen Fertilizer Segment | Product Sales, Excluding Renewable Fuel Activity              
Segment Reporting [Line Items]              
Net sales 202   168   382 310  
Operating Segments              
Segment Reporting [Line Items]              
Operating income (loss) 90   (87)   (46) (214)  
Operating Segments | Product Sales, Excluding Renewable Fuel Activity              
Segment Reporting [Line Items]              
Net sales 2,742   1,730   4,726 3,349  
Operating Segments | Petroleum Segment              
Segment Reporting [Line Items]              
Cost of materials and other 2,347   1,526   4,149 3,008  
Direct operating expenses (exclusive of depreciation and amortization) 116   102   233 193  
Selling, general and administrative expenses (exclusive of depreciation and amortization) 22   20   47 42  
Depreciation and amortization 49   48   102 90  
(Gain) loss on asset disposals 1   (2)   1 0  
Operating income (loss) 5   (133)   (188) (295)  
Reconciliation of Operating income (loss) to Net income:              
Interest income (expense), net 3   (5)   1 (5)  
Other segment disclosures:              
Capital expenditures 29   23   58 72  
Assets 3,260       3,260   2,987
Operating Segments | Petroleum Segment | Product Sales, Excluding Renewable Fuel Activity              
Segment Reporting [Line Items]              
Net sales 2,540   1,561   4,344 3,038  
Operating Segments | Nitrogen Fertilizer Segment              
Segment Reporting [Line Items]              
Cost of materials and other 28   33   58 60  
Direct operating expenses (exclusive of depreciation and amortization) 59   60   122 115  
Selling, general and administrative expenses (exclusive of depreciation and amortization) 7   8   16 16  
Depreciation and amortization 22   21   42 39  
(Gain) loss on asset disposals 1   1   2 0  
Operating income (loss) 85   46   142 81  
Reconciliation of Operating income (loss) to Net income:              
Interest income (expense), net (7)   (7)   16 15  
Other segment disclosures:              
Capital expenditures 17   10   31 16  
Assets 1,057       1,057   969
Operating Segments | Nitrogen Fertilizer Segment | Product Sales, Excluding Renewable Fuel Activity              
Segment Reporting [Line Items]              
Net sales 202   169   382 311  
Intersegment Eliminations              
Segment Reporting [Line Items]              
Net sales (4)   (4)   (8) (6)  
Operating income (loss) 1   3   4 5  
Intersegment Eliminations | Product Sales, Excluding Renewable Fuel Activity              
Segment Reporting [Line Items]              
Net sales (4)   (4)   (8) (6)  
Intersegment Eliminations | Petroleum Segment | Product Sales, Excluding Renewable Fuel Activity              
Segment Reporting [Line Items]              
Net sales (4)   (3)   (8) (5)  
Intersegment Eliminations | Nitrogen Fertilizer Segment | Product Sales, Excluding Renewable Fuel Activity              
Segment Reporting [Line Items]              
Net sales 0   (1)   0 (1)  
Corporate              
Segment Reporting [Line Items]              
Operating income (loss) (8)   (8)   (16) (15)  
Other              
Segment Reporting [Line Items]              
Net sales 0   35   0 64  
Operating income (loss) (5)   $ (11)   (9) $ (11)  
Corporate and Eliminations              
Other segment disclosures:              
Assets $ (238)       $ (238)   $ (250)