Revenue - Revenue Disaggregated by Major Product (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended |
Sep. 30, 2018 | Sep. 30, 2017 | Sep. 30, 2018 | Sep. 30, 2017 |
Disaggregation of Revenue [Line Items] | | | | |
Total revenue | $ 1,935 | $ 1,454 | $ 5,386 | $ 4,395 |
Revenue from product sales | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenue from product sales | 1,922 | | 5,307 | |
Gasoline | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenue from product sales | 951 | | 2,558 | |
Distillates | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenue from product sales | 840 | | 2,324 | |
Ammonia | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenue from product sales | 11 | | 51 | |
UAN | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenue from product sales | 53 | | 157 | |
Urea products | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenue from product sales | 5 | | 15 | |
Freight revenue | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenue from product sales | 15 | | 41 | |
Other | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenue from product sales | 47 | | 161 | |
Crude oil sales | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenue from product sales | 12 | | 75 | |
Other revenue | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Operating Leases, Income Statement, Lease Revenue | 1 | | 4 | |
Operating Segments | Petroleum | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenue | 1,857 | 1,386 | 5,139 | 4,148 |
Operating Segments | Petroleum | Revenue from product sales | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenue from product sales | 1,844 | | 5,060 | |
Operating Segments | Petroleum | Gasoline | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenue from product sales | 951 | | 2,558 | |
Operating Segments | Petroleum | Distillates | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenue from product sales | 840 | | 2,324 | |
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 | | 17 | |
Operating Segments | Petroleum | Other | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenue from product sales | 47 | | 161 | |
Operating Segments | Petroleum | Crude oil sales | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenue from product sales | 12 | | 75 | |
Operating Segments | Petroleum | Other revenue | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Operating Leases, Income Statement, Lease Revenue | 1 | | 4 | |
Operating Segments | Nitrogen Fertilizer | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenue | 80 | $ 69 | 253 | $ 253 |
Operating Segments | Nitrogen Fertilizer | Revenue from product sales | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenue from product sales | 80 | | 253 | |
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 | 11 | | 51 | |
Operating Segments | Nitrogen Fertilizer | UAN | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenue from product sales | 53 | | 157 | |
Operating Segments | Nitrogen Fertilizer | Urea products | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenue from product sales | 5 | | 15 | |
Operating Segments | Nitrogen Fertilizer | Freight revenue | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenue from product sales | 9 | | 24 | |
Operating Segments | Nitrogen Fertilizer | Other | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenue from product sales | 2 | | 6 | |
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] | | | | |
Operating Leases, Income Statement, Lease Revenue | 0 | | 0 | |
Other / Eliminations | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Total revenue | (2) | | (6) | |
Other / Eliminations | Revenue from product sales | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenue from product sales | (2) | | (6) | |
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 | | | | |
Disaggregation of Revenue [Line Items] | | | | |
Revenue from product sales | (2) | | (6) | |
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] | | | | |
Operating Leases, Income Statement, Lease Revenue | $ 0 | | $ 0 | |