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Intangible Assets and Goodwill - Summary of Intangible Assets (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Finite-Lived Intangible Assets [Line Items]    
Cost $ 7,394.3 $ 7,379.3
Total intangible assets 8,220.8 8,408.8
Accumulated Amortization (5,136.5) (4,881.4)
Net 2,257.8 2,497.9
Total intangible assets $ 3,084.3 3,527.4
Minimum    
Finite-Lived Intangible Assets [Line Items]    
Estimated life (in years) 4 years  
Maximum    
Finite-Lived Intangible Assets [Line Items]    
Estimated life (in years) 28 years  
In-process research and development    
Finite-Lived Intangible Assets [Line Items]    
Cost and net $ 762.5 965.5
Trademarks and trade names    
Finite-Lived Intangible Assets [Line Items]    
Cost and net $ 64.0 $ 64.0