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Derivatives and Hedging Activities - Narrative (Details)
$ in Millions
12 Months Ended
Dec. 31, 2019
USD ($)
derivative
Dec. 31, 2018
USD ($)
derivative
Dec. 31, 2017
USD ($)
Jun. 30, 2015
EUR (€)
Mar. 31, 2015
USD ($)
4.50% 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 $ (1.2) $ 0.6      
Foreign Currency Forward Contracts | Designated as Hedging Instruments          
Derivative [Line Items]          
Unrealized gain (losses) on derivative instruments, net of taxes (2.8) $ 2.9 $ (5.0)    
Estimate of net unrealized gains that will be reclassified into earnings in next twelve months $ (1.4)        
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 | 4.50% 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 $ 2.0        
Fair value of (liability) derivatives, after tax $ 1.5        
Cross-currency swaps | Net Investment Hedge          
Derivative [Line Items]          
Notional amount of outstanding derivative         $ 425.0
Cross-currency swaps | Designated as Hedging Instruments | Net Investment Hedge          
Derivative [Line Items]          
Fair Value of (liability) derivatives     61.9    
Semi-annual interest settlement resulted in AOCI     17.7    
Semi-annual interest settlement resulted in AOCI after tax     $ (44.2)