Derivatives and Financial Instruments - Assets and Liabilities Measured at Fair Value (Detail) - USD ($) $ in Millions	Jun. 30, 2025	Dec. 31, 2024	Dec. 02, 2024
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign currency contract liabilities	$ (94.4)	$ (16.3)
Contingent earn-out liabilities			$ (8.0)
Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign currency contract assets	0.1	2.5
Foreign currency contract liabilities	(94.2)	(16.3)
Deferred compensation plan	29.1	29.4
Contingent earn-out liabilities	(8.0)	(8.0)
Total recurring fair value measurements	(72.9)	9.5
Recurring | Interest Rate Contract
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate contract assets	0.3	1.9
Interest rate contract liabilities	(0.2)
Level 1 | Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign currency contract assets	0.0	0.0
Foreign currency contract liabilities	0.0	0.0
Deferred compensation plan	13.7	15.0
Contingent earn-out liabilities	0.0	0.0
Total recurring fair value measurements	13.7	15.0
Level 1 | Recurring | Interest Rate Contract
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate contract assets	0.0	0.0
Interest rate contract liabilities	0.0
Level 2 | Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign currency contract assets	0.1	2.5
Foreign currency contract liabilities	(94.2)	(16.3)
Deferred compensation plan	0.0	0.0
Contingent earn-out liabilities	0.0	0.0
Total recurring fair value measurements	(94.0)	(11.9)
Level 2 | Recurring | Interest Rate Contract
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate contract assets	0.3	1.9
Interest rate contract liabilities	(0.2)
Level 3 | Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign currency contract assets	0.0	0.0
Foreign currency contract liabilities	0.0	0.0
Deferred compensation plan	0.0	0.0
Contingent earn-out liabilities	(8.0)	(8.0)
Total recurring fair value measurements	(8.0)	(8.0)
Level 3 | Recurring | Interest Rate Contract
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate contract assets	0.0	0.0
Interest rate contract liabilities	0.0
NAV | Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign currency contract assets	0.0	0.0
Foreign currency contract liabilities	0.0	0.0
Deferred compensation plan	15.4	14.4
Contingent earn-out liabilities	0.0	0.0
Total recurring fair value measurements	15.4	14.4
NAV | Recurring | Interest Rate Contract
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate contract assets	0.0	$ 0.0
Interest rate contract liabilities	$ 0.0