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v3.21.1

Description of Business and Basis of Presentation (Details) |  | 1 Months Ended |  |
--- | --- | --- | --- | ---
Aug. 30, 2013 | Mar. 31, 2013 USD ($) $ / shares shares | Mar. 31, 2021 station states $ / shares | Dec. 31, 2020 $ / shares
Product Information [Line Items] |  |  |  |
Number of states in which entity operates | states |  |  | 25 |
Number of stations |  |  | 1,660 |
Common stock shares issued (in shares) | shares |  | 100 |  |
Common stock par value (in dollars per share) | $ / shares |  | $ 0.01 | $ 0.01 | $ 0.01
Proceeds from issuance of common stock | $ |  | $ 1.00 |  |
Percentage of shares of stock distributed (percent) | 100.00% |  |  |
Murphy USA |  |  |  |
Product Information [Line Items] |  |  |  |
Number of stations |  |  | 1,151 |
Murphy Express |  |  |  |
Product Information [Line Items] |  |  |  |
Number of stations |  |  | 353 |
QuickChek |  |  |  |
Product Information [Line Items] |  |  |  |
Number of stations |  |  | 156 |

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