Income Taxes - Rollforward of Unrecognized Tax Benefits (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Unrecognized Tax Benefits [Roll Forward]
Unrecognized tax benefits – January 1	$ 5.7	$ 6.7	$ 7.6
Additions for:
Current year tax positions	1.8	1.4	1.7
Prior year tax positions	0.1	0.5	0.3
Reductions for:
Prior year tax positions	0.0	(0.6)	(0.1)
Expiration of statute of limitations	(1.2)	(2.3)	(2.8)
Settlements	0.0	0.0	0.0
Unrecognized tax benefits – December 31	$ 6.4	$ 5.7	$ 6.7