Income Taxes - Component of Income Tax Provision (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Current:
Federal	$ 128.0	$ 194.4	$ 185.6
Foreign	77.4	63.7	45.5
State	42.0	73.9	73.0
Total	247.4	332.0	304.1
Deferred:
Federal	(67.7)	(53.9)	(51.9)
Foreign	(14.9)	(20.8)	(14.9)
State	(32.8)	(8.2)	(10.2)
Total	(115.4)	(82.9)	(77.0)
Provision for income taxes	$ 132.0	$ 249.1	$ 227.1