Income Taxes - Income Taxes (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Current expense (benefit):
Federal	$ 2.8	$ 1.7	$ (1.6)
State	1.1	0.1	(0.2)
Foreign	15.6	13.9	9.4
Total	19.5	15.7	7.6
Deferred (benefit) expense:
Federal	(11.9)	(7.1)	(8.0)
State	(1.8)	(1.2)	0.8
Foreign	(0.9)	1.1	(1.1)
Total	(14.6)	(7.2)	(8.3)
Income tax expense (benefit)	$ 4.9	$ 8.5	$ (0.7)