Income Taxes - Provision for Income Taxes (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Current Tax Provision:
Federal	$ 250.5	$ 357.7	$ 241.5
State	63.2	84.7	74.0
Non-U.S.	92.0	130.6	147.3
Total	405.7	573.0	462.8
Deferred Tax Provision:
Federal	(54.0)	(126.0)	(11.7)
State	(1.4)	(10.7)	12.0
Non-U.S.	7.2	(6.0)	1.7
Total	(48.2)	(142.7)	2.0
Provision for Income Taxes	$ 357.5	$ 430.3	$ 464.8