Income Taxes - Significant Components (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Current:
Federal	$ 1.7	$ (0.2)	$ 4.9
State and local	3.2	1.9	2.7
Foreign	16.5	12.2	11.4
Total current	21.4	13.9	19.0
Deferred:
Federal	(5.8)	7.5	(2.0)
State and local	1.1	(2.9)	(5.5)
Foreign	(3.2)	(3.6)	(8.7)
Total deferred	(7.9)	1.0	(16.2)
Income tax expense, net	$ 13.5	$ 14.9	$ 2.8