Revenue - Revenue Disaggregated by Major Product (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended |
Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2018 | Jun. 30, 2017 |
Disaggregation of Revenue [Line Items] | | | | |
Total revenue | $ 1,914 | $ 1,434 | $ 3,451 | $ 2,942 |
Revenue from product sales | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenue from product sales | 1,913 | | 3,448 | |
Gasoline | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenue from product sales | 896 | | 1,608 | |
Distillates | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenue from product sales | 832 | | 1,484 | |
Ammonia | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenue from product sales | 28 | | 40 | |
UAN | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenue from product sales | 51 | | 104 | |
Urea products | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenue from product sales | 5 | | 10 | |
Freight revenue | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenue from product sales | 13 | | 26 | |
Other product sales | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenue from product sales | 88 | | 176 | |
Other revenue | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Other revenue | 1 | | 3 | |
Operating Segments | Petroleum | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenue | 1,824 | 1,338 | 3,282 | 2,762 |
Operating Segments | Petroleum | Revenue from product sales | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenue from product sales | 1,823 | | 3,279 | |
Operating Segments | Petroleum | Gasoline | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenue from product sales | 896 | | 1,608 | |
Operating Segments | Petroleum | Distillates | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenue from product sales | 832 | | 1,484 | |
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 | 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 | 6 | | 11 | |
Operating Segments | Petroleum | Other product sales | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenue from product sales | 89 | | 176 | |
Operating Segments | Petroleum | Other revenue | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Other revenue | 1 | | 3 | |
Operating Segments | Nitrogen Fertilizer | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenue | 93 | $ 98 | 173 | $ 183 |
Operating Segments | Nitrogen Fertilizer | Revenue from product sales | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenue from product sales | 93 | | 173 | |
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 | 28 | | 40 | |
Operating Segments | Nitrogen Fertilizer | UAN | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenue from product sales | 51 | | 104 | |
Operating Segments | Nitrogen Fertilizer | Urea products | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenue from product sales | 5 | | 10 | |
Operating Segments | Nitrogen Fertilizer | Freight revenue | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenue from product sales | 7 | | 15 | |
Operating Segments | Nitrogen Fertilizer | Other product sales | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenue from product sales | 2 | | 4 | |
Operating Segments | Nitrogen Fertilizer | Other revenue | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Other revenue | 0 | | 0 | |
Other / Eliminations | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenue | (3) | | (4) | |
Other / Eliminations | Revenue from product sales | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenue from product sales | (3) | | (4) | |
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 | 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 product sales | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenue from product sales | (3) | | (4) | |
Other / Eliminations | Other revenue | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Other revenue | $ 0 | | $ 0 | |