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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, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Segment Reporting Information [Line Items] |  |  |
Net sales | $ 7,242 | $ 3,930 | $ 6,364
Operating income (loss) | 87 | (333) | 580
Interest expense, net | (117) | (130) | (102)
Investment income on marketable securities | 81 | 41 | 0
Other income, net | 15 | 7 | 13
Income (loss) before income tax expense | 66 | (415) | 491
Depreciation and amortization | 279 | 278 | 287
Capital expenditures | 226 | 121 | 114
Total assets | 3,906 | 3,978 |
Operating Segments | Petroleum |  |  |
Segment Reporting Information [Line Items] |  |  |
Net sales | 6,721 | 3,586 | 5,968
Operating income (loss) | (27) | (281) | 574
Depreciation and amortization | 203 | 202 | 202
Capital expenditures | 50 | 90 | 89
Total assets | 3,368 | 2,991 |
Operating Segments | Nitrogen Fertilizer |  |  |
Segment Reporting Information [Line Items] |  |  |
Net sales | 533 | 350 | 404
Operating income (loss) | 134 | (35) | 27
Depreciation and amortization | 73 | 76 | 80
Capital expenditures | 26 | 16 | 20
Total assets | 1,127 | 1,033 |
Other |  |  |
Segment Reporting Information [Line Items] |  |  |
Net sales | (12) | (6) | (8)
Operating income (loss) | (20) | (17) | (21)
Depreciation and amortization | 3 | 0 | 5
Capital expenditures | 150 | 15 | $ 5
Total assets | $ (589) | $ (46) |

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