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Retirement Plans (Details)
$ in Millions
12 Months Ended
Dec. 31, 2019
USD ($)
plan
Dec. 31, 2018
USD ($)
Dec. 31, 2017
USD ($)
Defined Benefit Plan Disclosure [Line Items]      
Employer matching contribution percent 7.00% 7.00% 7.00%
United States      
Defined Benefit Plan Disclosure [Line Items]      
Entity's contribution to retirement plans as percentage of employees' compensation 3.00%    
Cost of defined contribution plans $ 16.8 $ 15.8 $ 14.2
Canada      
Defined Benefit Plan Disclosure [Line Items]      
Number of defined contribution retirement plans | plan 4    
Switzerland      
Defined Benefit Plan Disclosure [Line Items]      
Contributions to pension funds $ 4.5 $ 4.5 $ 4.0
Minimum | Canada      
Defined Benefit Plan Disclosure [Line Items]      
Entity's contribution to retirement plans as percentage of employees' compensation 3.00%    
Maximum | Canada      
Defined Benefit Plan Disclosure [Line Items]      
Entity's contribution to retirement plans as percentage of employees' compensation 15.00%