Income Taxes - Computed Amount and Differences in Provision for Income Taxes (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Pretax income	$ 579.8	$ 470.3	$ 532.9
Computed amount at statutory rate of 21%	121.8	98.8	111.9
State and local income tax (net of federal tax benefit)	8.0	5.9	8.2
Taxes on non-U.S. earnings-net of foreign tax credits	9.2	8.4	6.3
Global Intangible Low-Taxed Income	0.4	(2.7)	2.3
Foreign-Derived Intangible Income Deduction	(7.5)	(4.9)	(5.8)
Share-based payments	(3.5)	(9.8)	(11.0)
Other	2.1	(3.2)	(4.5)
Total provision for income taxes	$ 130.5	$ 92.5	$ 107.4
Computed amount at statutory rate of 21%	21.00%	21.00%	21.00%
State and local income tax (net of federal tax benefit)	1.40%	1.30%	1.50%
Taxes on non-U.S. earnings-net of foreign tax credits	1.60%	1.80%	1.20%
Global Intangible Low-Taxed Income	0.10%	(0.60%)	0.40%
Foreign-Derived Intangible Income Deduction	(1.30%)	(1.00%)	(1.10%)
Share-based payments	(0.60%)	(2.10%)	(2.10%)
Other	0.30%	(0.70%)	(0.70%)
Total provision for income taxes	22.50%	19.70%	20.20%