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Debt - Additional Information (Details) - USD ($)
$ in Millions
1 Months Ended 3 Months Ended 6 Months Ended 12 Months Ended
Jan. 31, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2020
Jun. 30, 2019
Dec. 31, 2017
Dec. 31, 2015
Dec. 31, 2019
May 31, 2019
Debt Instrument [Line Items]                  
Borrowings     $ 1,264.7 $ 1,264.7       $ 1,050.6  
Repayment and termination of Euro term loan       $ 49.9 $ 9.0        
Term Loan                  
Debt Instrument [Line Items]                  
Repayment and termination of Euro term loan $ 49.9                
Maximum                  
Debt Instrument [Line Items]                  
Interest coverage ratio required to be maintained       375.00%          
Minimum                  
Debt Instrument [Line Items]                  
Interest coverage ratio required to be maintained       350.00%          
Senior unsecured credit facility- revolving loan due 2021 | Maximum                  
Debt Instrument [Line Items]                  
Maximum borrowing capacity                 $ 700.0
Senior unsecured credit facility- revolving loan due 2024                  
Debt Instrument [Line Items]                  
Debt instrument expiration period   2024-06              
Debt instrument, interest rate terms       The interest rate ranges from LIBOR + 0.875% to a maximum of LIBOR + 1.50%, depending upon the better of the Company’s leverage ratio or the credit rating. During the second quarter of 2020 the interest rate for the Facility increased to LIBOR + 1.125%, reflecting a change in the leverage ratio.          
Credit facility interest rate basis     LIBOR + 1.125%            
Spread on variable interest rate basis     1.125%            
Maximum amount available under credit facility agreement to issue letters of credit     $ 50.0 $ 50.0          
Letters of credit issued under credit facility       0.0          
Undrawn availability under credit facility     432.0 $ 432.0          
Weighted average interest rate       1.98%          
Debt instrument, covenant terms       As defined in the Facility agreement, we are required to maintain a minimum interest coverage ratio of 3.50 (based on the ratio of EBITDA to interest expense) and may not exceed a maximum leverage ratio of 3.75 (based on the ratio of total debt to EBITDA) with a step up to 4.25 allowed following certain acquisitions.          
Senior unsecured credit facility- revolving loan due 2024 | Level 2                  
Debt Instrument [Line Items]                  
Borrowings     $ 568.0 $ 568.0          
Senior unsecured credit facility- revolving loan due 2024 | Maximum                  
Debt Instrument [Line Items]                  
Maximum borrowing capacity   $ 1,000.0     $ 1,000.0        
Credit facility interest rate basis   LIBOR + 1.50%              
Spread on variable interest rate basis   1.50%              
Debt instrument covenant increase in interest coverage ratio       425.00%          
Senior unsecured credit facility- revolving loan due 2024 | Minimum                  
Debt Instrument [Line Items]                  
Credit facility interest rate basis   LIBOR + 0.875%              
Spread on variable interest rate basis   0.875%              
3.95% senior unsecured notes due 2027                  
Debt Instrument [Line Items]                  
Face value           $ 400.0      
Debt instrument, interest rate     3.95% 3.95%   3.95%      
Debt instrument, maturity year           2027      
Increase in senior notes interest rate           0.25%      
Effective interest rate     3.87% 3.87%          
3.95% senior unsecured notes due 2027 | Treasury Lock | Interest Lock Agreement                  
Debt Instrument [Line Items]                  
Percentage of effective interest rate benefit       0.25%          
3.95% senior unsecured notes due 2027 | Level 2                  
Debt Instrument [Line Items]                  
Fair value of senior unsecured notes     $ 427.7 $ 427.7          
3.95% senior unsecured notes due 2027 | Maximum                  
Debt Instrument [Line Items]                  
Debt instrument, interest rate           5.95%      
4.7% senior unsecured notes due 2025                  
Debt Instrument [Line Items]                  
Face value             $ 300.0    
Debt instrument, interest rate             4.70%    
Debt instrument, maturity year             2025    
Increase in senior notes interest rate             0.25%    
Effective interest rate     4.83% 4.83%          
4.7% senior unsecured notes due 2025 | Level 2                  
Debt Instrument [Line Items]                  
Fair value of senior unsecured notes     $ 326.7 $ 326.7          
4.7% senior unsecured notes due 2025 | Maximum                  
Debt Instrument [Line Items]                  
Debt instrument, interest rate             6.70%