Derivatives and Financial Instruments - Assets and Liabilities Measured at Fair Value (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign currency contract liabilities	$ (69.0)	$ (16.3)
Impairment charges, excluding goodwill	30.9	0.0	$ 0.0
Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign currency contract assets		2.5
Foreign currency contract liabilities	(68.8)	(16.3)
Deferred compensation plan assets	32.3	29.4
Contingent earn-out liabilities	(8.0)	(8.0)
Total recurring fair value measurements	(44.7)	9.5
Recurring | Interest Rate Contract
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate contract liabilities	(0.2)
Interest rate contract assets		1.9
Level 1 | Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign currency contract assets		0.0
Foreign currency contract liabilities	0.0	0.0
Deferred compensation plan assets	32.3	15.0
Contingent earn-out liabilities	0.0	0.0
Total recurring fair value measurements	32.3	15.0
Level 1 | Recurring | Interest Rate Contract
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate contract liabilities	0.0
Interest rate contract assets		0.0
Level 2 | Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign currency contract assets		2.5
Foreign currency contract liabilities	(68.8)	(16.3)
Deferred compensation plan assets	0.0	0.0
Contingent earn-out liabilities	0.0	0.0
Total recurring fair value measurements	(69.0)	(11.9)
Level 2 | Recurring | Interest Rate Contract
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate contract liabilities	(0.2)
Interest rate contract assets		1.9
Level 3 | Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign currency contract assets		0.0
Foreign currency contract liabilities	0.0	0.0
Deferred compensation plan assets	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 liabilities	0.0
Interest rate contract assets		0.0
NAV | Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign currency contract assets		0.0
Foreign currency contract liabilities	0.0	0.0
Deferred compensation plan assets	0.0	14.4
Contingent earn-out liabilities	0.0	0.0
Total recurring fair value measurements	0.0	14.4
NAV | Recurring | Interest Rate Contract
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate contract liabilities	$ 0.0
Interest rate contract assets		$ 0.0