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Acquisitions - Summary of Aggregate Preliminary Estimates of Fair Value of Assets Acquired and Liabilities Assumed (Detail) - USD ($)
$ in Millions
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Business Acquisition [Line Items]      
Goodwill $ 8,919.4 $ 8,983.1 $ 9,197.1
2020 Acquisitions [Member]      
Business Acquisition [Line Items]      
Current assets 30.5    
Goodwill 172.6    
Other assets 5.1    
Total assets acquired 450.3    
Current liabilities 4.6    
Deferred income taxes 42.0    
Total liabilities assumed 46.6    
Net assets acquired 403.7    
Technology [Member] | 2020 Acquisitions [Member]      
Business Acquisition [Line Items]      
Intangible assets subject to amortization: 147.9    
Trademarks and trade names [Member] | 2020 Acquisitions [Member]      
Business Acquisition [Line Items]      
Intangible assets subject to amortization: 1.5    
Customer relationships [Member] | 2020 Acquisitions [Member]      
Business Acquisition [Line Items]      
Intangible assets subject to amortization: $ 92.7