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v3.20.1

Commitments and Contingencies (Details) | 3 Months Ended |
--- | --- | ---
Mar. 31, 2020 USD ($) claim | Jan. 01, 2020 refinery
Long-term Purchase Commitment [Line Items] |  |
Number of owned and operated refineries | refinery |  | 4
Number of remaining claim to be resolved | claim | 2 |
Bankruptcy claims amount of claims to be settled | $ 22,400,000 |
Estimated value of claims remaining to be settled | 500,000 |
Maximum bankruptcy claims remaining | $ 22,400,000 |
Predecessor working ownership percentage | 3.40% |
Allowed claims, settlement ratio | 0.0544 |
Wyoming Refinery One |  |
Long-term Purchase Commitment [Line Items] |  |
Environmental remediation accrual | $ 16,300,000 |
Environmental costs recognized, period for recognition of one third costs | 5 years |
Environmental costs recognized, remainder, period for recognition | 30 years |
Wyoming Refinery Two | Waste Water Treatment System |  |
Long-term Purchase Commitment [Line Items] |  |
Environmental remediation accrual | $ 11,600,000 |
Wyoming Refinery |  |
Long-term Purchase Commitment [Line Items] |  |
Loss contingency, range of possible loss | 100,000 |
Tesoro Corporation | Indemnification Agreement |  |
Long-term Purchase Commitment [Line Items] |  |
Deductible for indemnification obligation | 1,000,000 |
Indemnification obligation cap | $ 15,000,000 |

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