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Related-Party Transactions (Tables) | 12 Months Ended
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Dec. 31, 2017
Related Party Transactions [Abstract] |
Schedule of Related Party Transactions | Related party transactions with affiliates for the years ended December 31, 2017, 2016, and 2015 were as follows (in millions):
| Year Ended December 31, 2017 |  | Year Ended December 31, 2016 |  | Year Ended December 31, 2015
Motor fuel sales to affiliates | $ | 55 |  |  | $ | 62 |  |  | $ | 20 |
Bulk fuel purchases from affiliates | $ | 2,416 |  |  | $ | 1,867 |  |  | $ | 2,449 |

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- Definition Tabular disclosure of related party transactions. Examples of related party transactions include, but are not limited to, transactions between (a) a parent company and its subsidiary; (b) subsidiaries of a common parent; (c) and entity and its principal owners and (d) affiliates. + References No definition available. + Details
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