Commitments and Contingencies Commitments and Contingencies (Throughput Contract) (Tables)

12 Months Ended

Dec. 31, 2019

Commitments and Contingencies Disclosure [Abstract]

Recorded Unconditional Purchase Obligations [Table Text Block]

As of December 31, 2019, the estimated minimum unconditional purchase commitments under the agreement were as follows (in millions):

Year	Commitment (1)
2020	$	2.6
2021	3.9
2022	3.9
2023	3.9
2024	4.0
Thereafter	9.4
Total (1)	$	27.7

⁽¹⁾  As of December 31, 2019, 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 consolidated balance sheets.