Financial Instruments and Fair Value Measurement - Schedule of Fair Value Hierarchy (Details) - USD ($) $ in Millions	Dec. 31, 2025	Dec. 31, 2024
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Money market funds	$ 187.4	$ 63.2
Available for sale investments	78.4	69.6
Trading securities	32.5	28.1
Deferred compensation plan liabilities	(32.5)	(28.1)
Derivatives:
Forward exchange contracts-Assets	0.1	1.4
Forward exchange contracts-(Liabilities)	(0.5)
Fair value, net asset (liability)	268.3	137.3
Time Deposits
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Time deposits	2.9	3.1
Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Money market funds	187.4	63.2
Available for sale investments	0.0	0.0
Trading securities	32.5	28.1
Deferred compensation plan liabilities	(32.5)	(28.1)
Derivatives:
Forward exchange contracts-Assets	0.0	0.0
Forward exchange contracts-(Liabilities)	0.0
Fair value, net asset (liability)	187.4	63.2
Quoted Prices in Active Markets for Identical Assets (Level 1) | Time Deposits
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Time deposits	0.0	0.0
Quoted Prices in Active Markets for Similar Assets (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Money market funds	0.0	0.0
Available for sale investments	78.4	69.6
Trading securities	0.0	0.0
Deferred compensation plan liabilities	0.0	0.0
Derivatives:
Forward exchange contracts-Assets	0.1	1.4
Forward exchange contracts-(Liabilities)	(0.5)
Fair value, net asset (liability)	80.9	74.1
Quoted Prices in Active Markets for Similar Assets (Level 2) | Time Deposits
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Time deposits	2.9	3.1
Unobservable inputs for which little or no market data exists (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Money market funds	0.0	0.0
Available for sale investments	0.0	0.0
Trading securities	0.0	0.0
Deferred compensation plan liabilities	0.0	0.0
Derivatives:
Forward exchange contracts-Assets	0.0	0.0
Forward exchange contracts-(Liabilities)	0.0
Fair value, net asset (liability)	0.0	0.0
Unobservable inputs for which little or no market data exists (Level 3) | Time Deposits
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Time deposits	$ 0.0	$ 0.0