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Fair Value Measurements (Details) - USD ($)
$ in Millions
9 Months Ended
Sep. 30, 2022
Dec. 31, 2021
Maximum    
Fair value of assets and liabilities measured on recurring basis    
Long-term investments maturity period 2 years  
Fair value measurements recurring basis    
Fair value of assets and liabilities measured on recurring basis    
Short-term investments $ 63.0 $ 44.3
Long-term investments 49.8  
Forward contracts 4.0  
Forward contracts   (0.4)
Redeemable noncontrolling interest (20.2) (19.0)
Total asset 96.6 24.9
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 44.3
Long-term investments 0.0  
Forward contracts 0.0  
Forward contracts   0.0
Redeemable noncontrolling interest 0.0 0.0
Total asset 0.0 44.3
Fair value measurements recurring basis | Significant Observable Inputs (Level 2)    
Fair value of assets and liabilities measured on recurring basis    
Short-term investments 63.0 0.0
Long-term investments 49.8  
Forward contracts 4.0  
Forward contracts   (0.4)
Redeemable noncontrolling interest 0.0 0.0
Total liability   (0.4)
Total asset 116.8  
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  
Forward contracts 0.0  
Forward contracts   0.0
Redeemable noncontrolling interest (20.2) (19.0)
Total liability $ (20.2) $ (19.0)