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Revenue (Tables) | 3 Months Ended
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Mar. 31, 2018
Revenue [Abstract] |
Disaggregation of Revenue [Table Text Block] | The following table depicts the disaggregation of revenue by segment:
| For the Three Months Ended March 31, 2018
| (in millions)
Retail Segment |
Retail Motor Fuel | $ | 445 |
Merchandise | 135 |
Other | 30 |
Total Retail Revenue | 610 |
Wholesale Segment |
Dealer | 800 |
Distributor | 1,623 |
Unbranded Wholesale | 562 |
Commission Agent | 121 |
Rental Income (1) | 19 |
Other | 14 |
Total Wholesale Revenue | 3,139 |
Total Revenue | $ | 3,749 |
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(1) | Rental Income is the result of our lease arrangements which are outside the scope of ASC Topic 606.
Contract with Customer, Asset and Liability [Table Text Block] | The opening and closing balances of the Partnership’s contract assets and contract liabilities are as follows:
| Balance at January 1, 2018 |  | Balance at March 31, 2018 |  | Increase/ (Decrease)
| (in millions)
Contract Balances |  |  |  |  |
Contract Asset | $ | 51 |  |  | $ | 55 |  |  | $ | 4 |
Accounts receivable from contracts with customers | $ | 445 |  |  | $ | 393 |  |  | $ | (52 | )
Contract Liability | $ | 1 |  |  | $ | 1 |  |  | $ | — |
The amount of revenue recognized in the current period that was included in the opening contract liability balance was $0.1 million. This amount of revenue is a result of changes in the transaction price of the Partnership’s contracts with customers. The difference in the opening and closing balances of the contract asset and contract liability primarily results from the timing difference between entity's performance and the customer’s payment.

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- Definition Revenue [Abstract] + References No definition available. + Details
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- Definition Tabular disclosure of contract balances and changes in contract balances. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=82913847&loc=SL49130551-203045 + Details
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- Definition Tabular disclosure of disaggregation of revenue into categories depicting how nature, amount, timing, and uncertainty of revenue and cash flows are affected by economic factor. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=82913847&loc=SL49130545-203045 + Details
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