Fair Value Measurements (Details) $ in Millions	12 Months Ended
	Dec. 31, 2023 USD ($) contract	Dec. 31, 2022 USD ($) contract
Fair value of assets and liabilities measured on recurring basis
Long-term investments maturity period	2 years
Net Investment Hedging [Member]
Fair value of assets and liabilities measured on recurring basis
Number of forward contracts | contract	0	1
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	$ 185.2	$ 61.1
Long-term investments	0.4	50.8
Forward contracts		1.5
Forward contracts	(0.5)
Redeemable noncontrolling interests	(30.7)	(20.6)
Total asset	154.4	92.8
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	185.2	61.1
Long-term investments	0.4	50.8
Forward contracts		1.5
Forward contracts	(0.5)
Redeemable noncontrolling interests	0.0	0.0
Total asset	185.1	113.4
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	(30.7)	(20.6)
Total liability	$ (30.7)	$ (20.6)