Fair Value Measurement - Schedule of Financial Assets and Liability by Fair Value Hierarchy Level (Details) - USD ($) $ in Millions	Jun. 30, 2026	Dec. 31, 2025
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Money market funds	$ 81.4	$ 187.4
Available for sale investments	82.1	78.4
Trading securities	34.9	32.5
Deferred compensation plan liabilities	(34.9)	(32.5)
Derivatives:
Forward exchange contracts-Assets	1.1	0.1
Forward exchange contracts-(Liabilities)		(0.5)
TOTAL	167.4	268.3
Time Deposits
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Time Deposits	2.8	2.9
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	81.4	187.4
Available for sale investments	0.0	0.0
Trading securities	34.9	32.5
Deferred compensation plan liabilities	(34.9)	(32.5)
Derivatives:
Forward exchange contracts-Assets	0.0	0.0
Forward exchange contracts-(Liabilities)		0.0
TOTAL	81.4	187.4
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	82.1	78.4
Trading securities	0.0	0.0
Deferred compensation plan liabilities	0.0	0.0
Derivatives:
Forward exchange contracts-Assets	1.1	0.1
Forward exchange contracts-(Liabilities)		(0.5)
TOTAL	86.0	80.9
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	2.8	2.9
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
TOTAL	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