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Business Combinations and Asset Acquisitions (Details)
€ in Millions, $ in Millions
3 Months Ended 12 Months Ended 16 Months Ended
Jan. 01, 2022
USD ($)
Dec. 01, 2021
USD ($)
Sep. 10, 2021
USD ($)
Sep. 10, 2021
EUR (€)
Aug. 13, 2021
USD ($)
Sep. 10, 2020
USD ($)
Jun. 30, 2020
Dec. 31, 2021
USD ($)
Dec. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
Dec. 31, 2021
USD ($)
Sep. 10, 2021
EUR (€)
Dec. 31, 2018
USD ($)
Business Acquisition [Line Items]                          
Purchase of businesses, net of cash acquired               $ 22.6 $ 2.8 $ 0.0      
Ownership percentage in joint venture             50.00%            
Goodwill               1,280.8 1,306.5 1,298.3 $ 1,280.8   $ 1,495.5
Restricted Cash               6.9 $ 7.4 $ 3.2 6.9    
Reversal of contingent consideration liability               3.3          
Appareo | Subsequent event                          
Business Acquisition [Line Items]                          
Purchase of businesses, net of cash acquired $ 61.4                        
Cash acquired from acquisition $ 0.5                        
Ownership percentage in joint venture 50.00%                        
Indebtedness payable $ 0.9                        
Creatives Sites Media                          
Business Acquisition [Line Items]                          
Purchase of businesses, net of cash acquired   $ 5.7                      
Goodwill   $ 5.7                      
Faromatics                          
Business Acquisition [Line Items]                          
Purchase of businesses, net of cash acquired     $ 5.5 € 4.6                  
Cash acquired from acquisition     0.1 € 0.1                  
Goodwill     2.2                 € 1.8  
Restricted Cash     $ 0.9                 € 0.8  
Number of months in which remaining payment is due for the acquisition     18 months                 18 months  
Faromatics | Technology                          
Business Acquisition [Line Items]                          
Finite-lived intangible assets acquired     $ 5.2                 € 4.4  
Headsight                          
Business Acquisition [Line Items]                          
Purchase of businesses, net of cash acquired         $ 16.8                
Goodwill         8.9                
Finite-lived intangible assets acquired         4.8                
151 Research                          
Business Acquisition [Line Items]                          
Purchase of businesses, net of cash acquired           $ 2.8              
Goodwill           7.2              
Contingent consideration liability           $ 4.4   0.8     0.8    
Payment for contingent consideration               0.5          
Foreign currency impact included in contingent consideration liability                     (0.2)    
Headsight and Faromatics                          
Business Acquisition [Line Items]                          
Finite-lived intangible assets acquired         $ 10.0                
Headsight and Faromatics | Technology                          
Business Acquisition [Line Items]                          
Finite-lived intangible assets acquired               $ 6.1     $ 6.1    
Intangible assets useful life     15 years 15 years 10 years                
Headsight and Faromatics | Customer relationships                          
Business Acquisition [Line Items]                          
Finite-lived intangible assets acquired         $ 3.2                
Intangible assets useful life         7 years                
Headsight and Faromatics | Trademarks                          
Business Acquisition [Line Items]                          
Finite-lived intangible assets acquired         $ 0.7                
Intangible assets useful life         7 years