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Related-Party Transactions - Additional Information (Details) $ in Millions |  | 3 Months Ended |  |
--- | --- | --- | --- | ---
Sep. 25, 2012 store | Mar. 31, 2017 USD ($) agreement $ / gal | Mar. 31, 2016 USD ($) | Dec. 31, 2016 USD ($) | Sep. 30, 2016 store
Related Party Transaction [Line Items] |  |  |  |  |
Related products purchase agreements | agreement |  | 2 |  |  |
Purchase agreements renewal term |  | 12 months |  |  |
Advances from affiliates |  | $ 1 |  | $ 87 |
Repayment of Line of credit |  | 857 | $ 447 |  |
Receivables from affiliates |  | 13 |  | 3 |
Accounts payable to affiliates |  | 111 |  | 109 |
Motor fuel sales to affiliates |  | $ 21 | 7 |  |
Philadelphia Energy Solutions Refining and Marketing [Member] |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Related products purchase agreements | agreement |  | 1 |  |  |
Merrill Lynch Commodities [Member] |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Related products purchase agreements | agreement |  | 1 |  |  |
Susser [Member] |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Distribution agreement term |  | 10 years |  |  |
Profit margin | $ / gal |  | 0.03 |  |  |
Purchase option term | 3 years |  |  |  |
Number of convenience stores | store | 75 |  |  |  |
Commercial agreement, initial term | 15 years |  |  |  |
Exclusive distributor, term | 10 years |  |  |  |
Number of convenience stores, sale lease back transactions completed | store |  |  |  |  | 75
Sunoco Retail LLC [Member] |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Distribution agreement term |  | 10 years |  |  |
Profit margin | $ / gal |  | 0.04 |  |  |
Affiliated Entity [Member] |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Receivables from affiliates |  | $ 13 |  | 3 |
Accounts payable to affiliates |  | 111 |  | 109 |
Motor fuel sales to affiliates |  | 21 | 7 |  |
Bulk fuel purchase from affiliates |  | 545 | $ 340 |  |
Affiliated Entity [Member] | Sunoco LLC [Member] |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Advances from affiliates |  | $ 1 |  | $ 87 |

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