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Revenue - Revenue Disaggregated by Major Product (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2020 | Mar. 31, 2019
Disaggregation of Revenue [Line Items] |  |
Net sales | $ 1,130 | $ 1,486
Revenue from product sales |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from product sales | 1,093 | 1,462
Gasoline |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from product sales | 516 | 673
Distillates |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from product sales | 476 | 651
Ammonia |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from product sales | 14 | 13
UAN |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from product sales | 47 | 64
Other urea products |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from product sales | 4 | 5
Freight revenue |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from product sales | 13 | 14
Other |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from product sales | 23 | 42
Crude oil sales |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from product sales | 37 | 23
Other revenue |  |
Disaggregation of Revenue [Line Items] |  |
Other revenue |  | 1
Operating Segments | Petroleum |  |
Disaggregation of Revenue [Line Items] |  |
Net sales | 1,057 | 1,397
Operating Segments | Petroleum | Revenue from product sales |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from product sales | 1,020 | 1,373
Operating Segments | Petroleum | Gasoline |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from product sales | 516 | 673
Operating Segments | Petroleum | Distillates |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from product sales | 476 | 651
Operating Segments | Petroleum | Ammonia |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from product sales | 0 | 0
Operating Segments | Petroleum | UAN |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from product sales | 0 | 0
Operating Segments | Petroleum | Other urea products |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from product sales | 0 | 0
Operating Segments | Petroleum | Freight revenue |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from product sales | 5 | 6
Operating Segments | Petroleum | Other |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from product sales | 23 | 43
Operating Segments | Petroleum | Crude oil sales |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from product sales | 37 | 23
Operating Segments | Petroleum | Other revenue |  |
Disaggregation of Revenue [Line Items] |  |
Other revenue |  | 1
Operating Segments | Nitrogen Fertilizer |  |
Disaggregation of Revenue [Line Items] |  |
Net sales | 75 | 92
Operating Segments | Nitrogen Fertilizer | Revenue from product sales |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from product sales | 75 | 92
Operating Segments | Nitrogen Fertilizer | Gasoline |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from product sales | 0 | 0
Operating Segments | Nitrogen Fertilizer | Distillates |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from product sales | 0 | 0
Operating Segments | Nitrogen Fertilizer | Ammonia |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from product sales | 14 | 13
Operating Segments | Nitrogen Fertilizer | UAN |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from product sales | 47 | 64
Operating Segments | Nitrogen Fertilizer | Other urea products |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from product sales | 4 | 5
Operating Segments | Nitrogen Fertilizer | Freight revenue |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from product sales | 8 | 8
Operating Segments | Nitrogen Fertilizer | Other |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from product sales | 2 | 2
Operating Segments | Nitrogen Fertilizer | Crude oil sales |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from product sales | 0 | 0
Operating Segments | Nitrogen Fertilizer | Other revenue |  |
Disaggregation of Revenue [Line Items] |  |
Other revenue |  | 0
Other / Eliminations |  |
Disaggregation of Revenue [Line Items] |  |
Net sales | (2) | (3)
Other / Eliminations | Revenue from product sales |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from product sales | (2) | (3)
Other / Eliminations | Gasoline |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from product sales | 0 | 0
Other / Eliminations | Distillates |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from product sales | 0 | 0
Other / Eliminations | Ammonia |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from product sales | 0 | 0
Other / Eliminations | UAN |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from product sales | 0 | 0
Other / Eliminations | Other urea products |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from product sales | 0 | 0
Other / Eliminations | Freight revenue |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from product sales | 0 | 0
Other / Eliminations | Other |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from product sales | (2) | (3)
Other / Eliminations | Crude oil sales |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from product sales | $ 0 | 0
Other / Eliminations | Other revenue |  |
Disaggregation of Revenue [Line Items] |  |
Other revenue |  | $ 0

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