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Debt (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Debt Instrument [Line Items]    
Long-term Line of Credit, Noncurrent, Net of Debt Issuance Costs $ 512.7 $ (15.9)
Line of Credit Facility [Line Items]    
Long-term debt, net of debt issuance costs 664.6 671.5
Line of Credit Facility, Maximum Borrowing Capacity 87.1  
Letters of Credit Outstanding, Amount 0.8 8.6
Agreement expires August 31, 2020 [Member]    
Line of Credit Facility [Line Items]    
Line of Credit Facility, Maximum Borrowing Capacity 100.0  
Line of Credit, Current $ 11.4  
Pricing on the Facility based on market rates LIBOR plus 1.15%  
Agreement expires September 23, 2019, Extension [Member]    
Line of Credit Facility [Line Items]    
Line of Credit Facility, Maximum Borrowing Capacity   375.0
Line of Credit, Current   217.3
Agreement expires September 19, 2020, Extension [Member]    
Line of Credit Facility [Line Items]    
Line of Credit Facility, Maximum Borrowing Capacity $ 775.0  
Line of Credit, Current $ 184.8  
Pricing on the Facility based on market rates LIBOR plus 1.15%  
Long-term senior notes, 4.4%, due November 2022 [Member]    
Line of Credit Facility [Line Items]    
Long-term debt, net of debt issuance costs $ 273.8 273.5
Debt Instrument, Face Amount $ 275.0 $ 275.0
Debt Instrument, Interest Rate, Stated Percentage 4.40% 4.40%
Unamortized Debt Issuance Expense $ 1.2 $ 1.5
Long-term senior notes, Euro notes, 1.96%, due June 2027 [Member]    
Line of Credit Facility [Line Items]    
Long-term debt, net of debt issuance costs 195.4 199.0
Debt Instrument, Face Amount $ 175.0 $ 175.0
Debt Instrument, Interest Rate, Stated Percentage 1.96% 1.96%
Unamortized Debt Issuance Expense $ 0.9 $ 1.1
Long-term senior notes, Euro notes, 2.21%, due June 2029 [Member]    
Line of Credit Facility [Line Items]    
Long-term debt, net of debt issuance costs 195.4 199.0
Debt Instrument, Face Amount $ 175.0 $ 175.0
Debt Instrument, Interest Rate, Stated Percentage 2.21% 2.21%
Unamortized Debt Issuance Expense $ 1.0 $ 1.1
Long-Term Senior Notes [Member]    
Line of Credit Facility [Line Items]    
Unamortized Debt Issuance Expense 3.1 3.7
Line of Credit [Member]    
Debt Instrument [Line Items]    
Long-term Line of Credit, Noncurrent, Net of Debt Issuance Costs 512.7 (15.9)
Line of Credit Facility [Line Items]    
Line of Credit Facility, Maximum Borrowing Capacity $ 2,750.0  
Pricing on the Facility based on market rates LIBOR plus 0.875% to 1.35%  
Description of variable rate basis LIBOR  
Basis spread on variable rate 1.00%  
Line of Credit Facility, Average Outstanding Amount $ 851.6 $ 364.1
Line of Credit Facility, Interest Rate During Period 3.00% 2.90%
Unamortized Debt Issuance Expense $ 12.3 $ 15.9