Income Taxes - Components of Provision for Income Taxes (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Current:
Federal	$ 59.5	$ 139.8	$ 145.4
State	13.0	21.7	25.9
Foreign	40.8	44.7	41.5
Deferred	(83.7)	(88.5)	(54.8)
Total provision for income taxes	$ 29.6	$ 117.7	$ 158.0