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Commitments and Contingencies - Litigation (Details) |  | 1 Months Ended
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Jun. 25, 2021 claimant | Dec. 31, 2020 count
CRRM | Environmental, Health, and Safety Matters | Clean Air Act Matter |  |
Loss Contingencies [Line Items] |  |
Number of counts asserted related to alleged violations | count |  | 9
WRC and Others | Small Refinery Exemption |  |
Loss Contingencies [Line Items] |  |
Number of refineries whose SREs were vacated under RFS program under the CAA | 3 |
WRC | Small Refinery Exemption |  |
Loss Contingencies [Line Items] |  |
Number of refineries whose SREs were vacated under RFS program under the CAA | 1 |

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