Income Taxes - Provision/(Benefit) for Income Taxes and Income Taxes Paid (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Current:
Federal	$ 4.4	$ 0.5	$ 175.3
State	20.9	19.5	16.1
Foreign	153.8	118.5	(14.7)
Current, Total	179.1	138.5	176.7
Deferred:
Federal	(59.7)	(125.2)	(74.8)
State	(12.3)	(16.7)	1.6
Foreign	24.3	45.6	8.8
Deferred, Total	(47.7)	(96.3)	(64.4)
Provision for income taxes	131.4	42.2	112.3
Net income taxes paid	$ 328.5	$ 215.2	$ 326.6