Income Taxes - Effective Tax Rate Reconciliation (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Income Tax Disclosure [Abstract]
Statutory rate	21.00%	21.00%	21.00%
Tax that would result from use of the federal statutory rate	$ 203.1	$ 109.9	$ 216.6
State and local income tax, net of federal effect	30.1	5.2	30.5
Varying tax rates of foreign affiliates	6.8	2.9	2.6
Valuation Allowances	0.0	(4.1)	(8.5)
Stock Options Exercised	(21.8)	(5.2)	(29.0)
Reserve for Uncertain Tax Position	(0.3)	(0.9)	0.0
Other	(6.1)	1.6	(8.0)
Recorded tax expense	$ 211.8	$ 109.4	$ 204.2
Effective tax rate	21.90%	20.90%	19.80%