Fair Value Measurements (Details) $ in Millions	Jun. 30, 2025 USD ($) contract	Dec. 31, 2024 USD ($) contract
Net Investment Hedging [Member]
Fair value of assets and liabilities measured on recurring basis
Number of forward contracts | contract	0	0
Cash Flow Hedging
Fair value of assets and liabilities measured on recurring basis
Number of forward contracts | contract	0	0
Fair value measurements recurring basis
Fair value of assets and liabilities measured on recurring basis
Short-term investments	$ 19.4	$ 18.4
Long-term investments	0.2	0.3
Forward contracts	2.0
Forward contracts		(1.1)
Redeemable noncontrolling interests	(10.1)	(8.7)
Total asset	11.5	8.9
Fair value measurements recurring basis | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair value of assets and liabilities measured on recurring basis
Short-term investments	0.0	0.0
Long-term investments	0.0	0.0
Forward contracts	0.0
Forward contracts		0.0
Redeemable noncontrolling interests	0.0	0.0
Total asset	0.0	0.0
Fair value measurements recurring basis | Significant Observable Inputs (Level 2)
Fair value of assets and liabilities measured on recurring basis
Short-term investments	19.4	18.4
Long-term investments	0.2	0.3
Forward contracts	2.0
Forward contracts		(1.1)
Redeemable noncontrolling interests	0.0	0.0
Total asset	21.6	17.6
Fair value measurements recurring basis | Significant Unobservable Inputs (Level 3)
Fair value of assets and liabilities measured on recurring basis
Short-term investments	0.0	0.0
Long-term investments	0.0	0.0
Forward contracts	0.0
Forward contracts		0.0
Redeemable noncontrolling interests	(10.1)	(8.7)
Total liability	$ (10.1)	$ (8.7)