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Derivatives and Hedging Activities - Narrative (Details)
$ in Millions
12 Months Ended
Dec. 31, 2020
USD ($)
derivative
Dec. 31, 2019
USD ($)
derivative
Dec. 31, 2018
USD ($)
Jun. 30, 2016
EUR (€)
Senior Notes due September 2023        
Derivative [Line Items]        
Debt interest rate 4.50%      
Foreign Currency Forward Contracts        
Derivative [Line Items]        
Fair Value of (liability) derivatives $ 0.3 $ (1.2)    
Foreign Currency Forward Contracts | Designated as Hedging Instruments        
Derivative [Line Items]        
Unrealized (loss) gain on derivative instruments, net of taxes (1.6) $ (2.8) $ 2.9  
Estimate of net unrealized losses that will be reclassified into earnings in next twelve months $ (2.9)      
Foreign Currency Forward Contracts | Not Designated as Hedging Instruments        
Derivative [Line Items]        
Maximum original maturity period of foreign currency forward contracts 12 months      
Interest Rate Swaps        
Derivative [Line Items]        
Number of derivative instruments outstanding | derivative 0 0    
EUR - Denominated debt | Net Investment Hedge | Senior Notes due September 2023        
Derivative [Line Items]        
Debt instrument face amount | €       € 400,000,000.0
Debt interest rate       4.50%
EUR - Denominated debt | Designated as Hedging Instruments | Net Investment Hedge        
Derivative [Line Items]        
Fair Value of (liability) derivatives $ (42.0)      
Fair value of (liability) derivatives, after tax $ (31.5)