Other Current Assets and Liabilities - Other Current Assets (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2025	Sep. 30, 2025	Dec. 31, 2024
Other Current Assets and Liabilities [Abstract]
Consolidated Net RINs Obligation surplus	$ 146.8	$ 146.8	$ 0.0
Short-term derivative assets	61.0	61.0	8.8
Prepaid expenses	60.7	60.7	69.2
Income and other tax receivables	5.2	5.2	6.7
Other	4.7	4.7	0.8
Total	278.4	278.4	$ 85.5
RIN reserve	$ (39.4)	$ (39.4)