Income Taxes - Components of Income Tax Expense (Benefit) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Income Tax Disclosure [Abstract]
Document Fiscal Year Focus	2022
Current:
U.S. Federal	$ 1.2	$ 0.4	$ 0.7
State and local	0.6	0.3	0.2
Foreign	5.5	14.8	10.3
Total current tax expense	7.3	15.5	11.2
Deferred:
U.S. Federal	3.0	(57.1)	(0.4)
State and local	(0.3)	(2.6)	0.2
Foreign	1.9	(1.4)	(2.6)
Total deferred tax expense (benefit)	4.6	(61.1)	(2.8)
Total income tax expense (benefit)	$ 11.9	$ (45.6)	$ 8.4