Income Taxes - Components of Income Tax Expense (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income before income taxes:
United States	$ 347.5	$ 340.7	$ 345.2
International	111.8	83.8	124.0
Income from continuing operations before income taxes	459.3	424.5	469.2
Provision for income taxes — current:
Federal	43.3	56.3	57.9
State	13.0	15.1	14.2
International	22.7	17.0	25.1
Total provision — current	79.0	88.4	97.2
Provision for income taxes — deferred:
Federal	8.8	1.5	7.6
State	1.9	0.2	(0.7)
International	(1.5)	(0.3)	(2.9)
Total provision — deferred	9.2	1.4	4.0
TOTAL PROVISION FOR INCOME TAXES	$ 88.2	$ 89.8	$ 101.2