Employee Benefits - Change in Projected Benefit Obligation (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Actuarial Loss (Gain)	$ (73.6)	$ 53.3
Supplemental Plan
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Beginning Balance	109.2	113.6
Service Cost	4.7	4.8	$ 5.6
Interest Cost	5.0	5.3	3.9
Employee Contributions	0.0	0.0
Plan Amendment	0.0	0.0
Actuarial Loss (Gain)	(0.8)	8.4
Settlements	0.0	0.0
Benefits Paid	(14.3)	(22.9)
Foreign Exchange Rate Changes	0.0	0.0
Ending Balance	103.8	109.2	113.6
U.S. | Pension Plans
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Beginning Balance	1,151.7	1,077.7
Service Cost	53.6	46.0	48.0
Interest Cost	55.6	53.9	46.3
Employee Contributions	0.0	0.0
Plan Amendment	0.0	0.0
Actuarial Loss (Gain)	(60.9)	36.8
Settlements	0.0	0.0
Benefits Paid	(61.0)	(62.7)
Foreign Exchange Rate Changes	0.0	0.0
Ending Balance	1,139.0	1,151.7	1,077.7
Non U.S. Plans | Pension Plans
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Beginning Balance	148.6	129.0
Service Cost	1.9	1.6	1.7
Interest Cost	4.5	4.8	2.5
Employee Contributions	0.8	0.8
Plan Amendment	(0.4)	(0.2)
Actuarial Loss (Gain)	(11.9)	8.1
Settlements	(1.7)	0.0
Benefits Paid	(4.3)	(4.1)
Foreign Exchange Rate Changes	(6.8)	8.6
Ending Balance	$ 130.7	$ 148.6	$ 129.0