Income Taxes - Computed Amount and Differences in Provision for Income Taxes (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Income Tax Disclosure [Abstract]
Pretax income	$ 760.3	$ 749.4	$ 579.8
Computed amount at statutory rate of 21%	159.7	157.4	121.8
State and local income tax (net of federal tax benefit)	12.6	11.4	8.0
Taxes on non-U.S. earnings-net of foreign tax credits	10.8	12.4	9.2
Global Intangible Low-Taxed Income	0.0	2.0	0.4
Effective Income Tax Rate Reconciliation, FDII, Amount	(11.3)	(11.9)	(7.5)
Share-based payments	(2.0)	(2.6)	(3.5)
Other	(5.1)	(6.0)	2.1
Total provision for income taxes	$ 164.7	$ 162.7	$ 130.5
Computed amount at statutory rate of 21%	21.00%	21.00%	21.00%
State and local income tax (net of federal tax benefit)	1.70%	1.50%	1.40%
Taxes on non-U.S. earnings-net of foreign tax credits	1.40%	1.70%	1.60%
Global Intangible Low-Taxed Income	0.00%	0.30%	0.10%
Foreign-Derived Intangible Income Deduction	(1.50%)	(1.60%)	(1.30%)
Share-based payments	(0.30%)	(0.40%)	(0.60%)
Other	(0.60%)	(0.80%)	0.30%
Total provision for income taxes	21.70%	21.70%	22.50%