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Commitments and Contingencies Commitments and Contingencies - Narrative - Throughput Contract (Details)
$ in Millions
 6 Months Ended
Jun. 30, 2020
USD ($)
bbl
Commitments and Contingencies Disclosure [Abstract]  
Unrecorded Unconditional Purchase Obligations Disclosure [Table Text Block]
As of June 30, 2020, the estimated minimum unconditional purchase commitments, including the capital recovery charge, under the agreement were as follows (in millions):
Year
Commitment
2020
$
2.0

2021
3.9

2022
3.9

2023
3.9

2024
4.0

Thereafter
10.0

Total (1)
$
27.7

 
(1) 
As of June 30, 2020, the estimated minimum payments for the unconditional purchase commitments have been accrued and are included in other current liabilities and other long-term liabilities in the condensed consolidated balance sheets. This liability was accrued due to the fact that the contract was entered into to supply crude to a divested facility.
Long-term Purchase Commitment [Line Items]  
Long-term Purchase Commitment, Minimum Volume Required | bbl 5,000
Product Liability Contingency, Third Party Recovery, Percentage 2.00%
Throughput Contract Term seven
Purchase Commitment, Remaining Minimum Amount Committed $ 27.7 [1]
2020  
Long-term Purchase Commitment [Line Items]  
Purchase Commitment, Remaining Minimum Amount Committed 2.0
2021  
Long-term Purchase Commitment [Line Items]  
Purchase Commitment, Remaining Minimum Amount Committed 3.9
2022  
Long-term Purchase Commitment [Line Items]  
Purchase Commitment, Remaining Minimum Amount Committed 3.9
2023  
Long-term Purchase Commitment [Line Items]  
Purchase Commitment, Remaining Minimum Amount Committed 3.9
2024  
Long-term Purchase Commitment [Line Items]  
Purchase Commitment, Remaining Minimum Amount Committed 4.0
Thereafter  
Long-term Purchase Commitment [Line Items]  
Purchase Commitment, Remaining Minimum Amount Committed $ 10.0
[1]
As of June 30, 2020, the estimated minimum payments for the unconditional purchase commitments have been accrued and are included in other current liabilities and other long-term liabilities in the condensed consolidated balance sheets. This liability was accrued due to the fact that the contract was entered into to supply crude to a divested facility.