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Business Acquisitions (Details) - USD ($)
$ in Millions
3 Months Ended 12 Months Ended
Nov. 02, 2016
Nov. 30, 2015
Apr. 02, 2017
Dec. 31, 2018
Oct. 28, 2018
Dec. 31, 2017
Acquisition            
Estimated useful lives       12 years 1 month 6 days    
Goodwill resulted through acquisition       $ 544.8 $ 544.3 $ 550.5
Redeemable financial instrument            
Acquisition            
Liability recorded at acquisition date fair value       $ 2.8   $ 2.9
Customer relationships            
Acquisition            
Estimated useful lives       11 years    
Technology            
Acquisition            
Estimated useful lives       7 years 2 months 12 days    
Trade name            
Acquisition            
Estimated useful lives       13 years 8 months 12 days    
PVI Riverside Holdings, Inc Member            
Acquisition            
Outstanding shares acquired (as a percent) 100.00%          
Purchase price $ 79.1          
Goodwill resulted through acquisition 41.1          
Purchase price allocated to intangible assets 31.0          
Goodwill deductible for tax purposes $ 6.9          
PVI Riverside Holdings, Inc Member | Customer relationships            
Acquisition            
Estimated useful lives 15 years          
Purchase price allocated to intangible assets $ 17.6          
PVI Riverside Holdings, Inc Member | Technology            
Acquisition            
Estimated useful lives 10 years          
Purchase price allocated to intangible assets $ 10.2          
PVI Riverside Holdings, Inc Member | Trade name            
Acquisition            
Estimated useful lives 20 years          
Purchase price allocated to intangible assets $ 3.2          
Apex            
Acquisition            
Outstanding shares acquired (as a percent)   80.00% 10.00%      
Purchase price   $ 20.4 $ 2.9      
Aggregate ownership percentage       90.00%    
Shares remaining to be acquired (as a percent)   20.00%   10.00%    
Apex | Redeemable financial instrument            
Acquisition            
Liability recorded at acquisition date fair value   $ 5.5