Revenue - Revenue Disaggregated by Major Product (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended |
Sep. 30, 2020 | Sep. 30, 2019 | Sep. 30, 2020 | Sep. 30, 2019 |
Disaggregation of Revenue [Line Items] | | | | |
Net sales | $ 1,005 | $ 1,622 | $ 2,811 | $ 4,794 |
Revenue from product sales | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenue from product sales | 997 | 1,615 | 2,755 | 4,755 |
Gasoline | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenue from product sales | 513 | 796 | 1,329 | 2,285 |
Distillates | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenue from product sales | 381 | 692 | 1,102 | 2,035 |
Ammonia | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenue from product sales | 13 | 11 | 64 | 74 |
UAN | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenue from product sales | 51 | 62 | 153 | 200 |
Other urea products | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenue from product sales | 3 | 5 | 11 | 14 |
Freight revenue | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenue from product sales | 14 | 15 | 37 | 41 |
Other | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenue from product sales | 22 | 34 | 59 | 106 |
Crude oil sales | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenue from product sales | 8 | 7 | 55 | 36 |
Other revenue | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Other revenue | 0 | | 1 | |
Operating Segments | Petroleum | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Net sales | 927 | 1,535 | 2,556 | 4,484 |
Operating Segments | Petroleum | Revenue from product sales | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenue from product sales | 919 | 1,528 | 2,500 | 4,445 |
Operating Segments | Petroleum | Gasoline | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenue from product sales | 513 | 796 | 1,329 | 2,285 |
Operating Segments | Petroleum | Distillates | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenue from product sales | 381 | 692 | 1,102 | 2,035 |
Operating Segments | Petroleum | Ammonia | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenue from product sales | 0 | 0 | 0 | 0 |
Operating Segments | Petroleum | UAN | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenue from product sales | 0 | 0 | 0 | 0 |
Operating Segments | Petroleum | Other urea products | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenue from product sales | 0 | 0 | 0 | 0 |
Operating Segments | Petroleum | Freight revenue | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenue from product sales | 4 | 6 | 13 | 17 |
Operating Segments | Petroleum | Other | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenue from product sales | 21 | 34 | 56 | 108 |
Operating Segments | Petroleum | Crude oil sales | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenue from product sales | 8 | 7 | 55 | 36 |
Operating Segments | Petroleum | Other revenue | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Other revenue | 0 | | 1 | |
Operating Segments | Nitrogen Fertilizer | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Net sales | 79 | 89 | 260 | 318 |
Operating Segments | Nitrogen Fertilizer | Revenue from product sales | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenue from product sales | 79 | 89 | 260 | 318 |
Operating Segments | Nitrogen Fertilizer | Gasoline | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenue from product sales | 0 | 0 | 0 | 0 |
Operating Segments | Nitrogen Fertilizer | Distillates | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenue from product sales | 0 | 0 | 0 | 0 |
Operating Segments | Nitrogen Fertilizer | Ammonia | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenue from product sales | 13 | 11 | 64 | 74 |
Operating Segments | Nitrogen Fertilizer | UAN | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenue from product sales | 51 | 62 | 153 | 200 |
Operating Segments | Nitrogen Fertilizer | Other urea products | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenue from product sales | 3 | 5 | 11 | 14 |
Operating Segments | Nitrogen Fertilizer | Freight revenue | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenue from product sales | 10 | 9 | 24 | 24 |
Operating Segments | Nitrogen Fertilizer | Other | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenue from product sales | 2 | 2 | 8 | 6 |
Operating Segments | Nitrogen Fertilizer | Crude oil sales | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenue from product sales | 0 | 0 | 0 | 0 |
Operating Segments | Nitrogen Fertilizer | Other revenue | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Other revenue | 0 | | 0 | |
Other / Elimination | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Net sales | (1) | (2) | (5) | (8) |
Other / Elimination | Revenue from product sales | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenue from product sales | (1) | (2) | (5) | (8) |
Other / Elimination | Gasoline | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenue from product sales | 0 | 0 | 0 | 0 |
Other / Elimination | Distillates | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenue from product sales | 0 | 0 | 0 | 0 |
Other / Elimination | Ammonia | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenue from product sales | 0 | 0 | 0 | 0 |
Other / Elimination | UAN | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenue from product sales | 0 | 0 | 0 | 0 |
Other / Elimination | Other urea products | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenue from product sales | 0 | 0 | 0 | 0 |
Other / Elimination | Freight revenue | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenue from product sales | 0 | 0 | 0 | 0 |
Other / Elimination | Other | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenue from product sales | (1) | (2) | (5) | (8) |
Other / Elimination | Crude oil sales | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenue from product sales | 0 | $ 0 | 0 | $ 0 |
Other / Elimination | Other revenue | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Other revenue | $ 0 | | $ 0 | |