Income Taxes - Expense (Benefit) for Income Taxes (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Current tax provision:
Federal	$ 9.8	$ 2.9	$ 1.7
State	5.7	2.3	1.5
Foreign	6.4	14.6	5.3
Current tax provision (benefit)	21.9	19.8	8.5
Deferred tax expense (benefit):
Federal	(42.6)	11.0	8.6
State	7.9	7.2	5.2
Foreign	(3.2)	(9.4)	(22.9)
Deferred tax expense (benefit)	(37.9)	8.8	(9.1)
Income tax (benefit) provision	$ (16.0)	$ 28.6	$ (0.6)