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Revenues (Narrative) (Details) - USD ($) $ in Millions | 3 Months Ended |
--- | --- | ---
Mar. 31, 2021 | Dec. 31, 2020
Disaggregation of Revenue [Line Items] |  |
Trade accounts receivable | $ 182.1 | $ 168.8
Trade Accounts Receivable |  |
Disaggregation of Revenue [Line Items] |  |
Trade accounts receivable | $ 111.1 | $ 88.3
Bulk pipelines sales |  |
Disaggregation of Revenue [Line Items] |  |
Collection period | 7 days |
Petroleum product sales, rack sales | Marketing |  |
Disaggregation of Revenue [Line Items] |  |
Collection period | 10 days |
RINs | Marketing |  |
Disaggregation of Revenue [Line Items] |  |
Collection period | 5 days |
Minimum | Petroleum product sales (at retail) | Marketing |  |
Disaggregation of Revenue [Line Items] |  |
Collection period | 2 days |
Maximum | Petroleum product sales (at retail) | Marketing |  |
Disaggregation of Revenue [Line Items] |  |
Collection period | 7 days |

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