Other Current Assets and Liabilities - Accrued Expenses and Other Current Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Other Current Assets and Liabilities [Abstract]
Product financing agreements	$ 198.0	$ 21.1
Income and other taxes payable	109.5	119.6
Crude purchase liabilities	62.1	72.1
Consolidated Net RINs Obligation deficit	59.6	0.0
Short-term derivative liabilities	35.8	14.1
Employee costs	30.2	47.6
Other	51.2	72.3
Total	$ 546.4	$ 346.8