Annual report pursuant to Section 13 and 15(d)

ACQUISITIONS AND INVESTMENTS - Schedule Assets and Liabilities (Details)

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ACQUISITIONS AND INVESTMENTS - Schedule Assets and Liabilities (Details) - USD ($)
$ in Millions
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Business Acquisition [Line Items]      
Identifiable intangible assets $ 59.5 $ 92.0  
Goodwill 4,495.8 4,308.3 $ 4,129.7
2020 Acquisitions      
Business Acquisition [Line Items]      
Cash 9.7    
Accounts receivable and other current assets 2.5    
Other assets 2.7    
Identifiable intangible assets 59.5    
Goodwill 58.3    
Total assets acquired 132.7    
Other current liabilities (6.4)    
Other liabilities (15.0)    
Net assets acquired $ 111.3    
2019 Acquisitions      
Business Acquisition [Line Items]      
Cash   5.5  
Accounts receivable and other current assets   5.5  
Other assets   1.5  
Identifiable intangible assets   92.0  
Goodwill   197.4  
Total assets acquired   301.9  
Other current liabilities   (5.1)  
Other liabilities   (18.4)  
Net assets acquired   $ 278.4