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Summary of Significant Accounting Policies - Summary of Intangible Assets (Detail) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Value $ 643.3 $ 554.9
Accumulated Amortization (230.4) (169.2)
Net Carrying Value 412.9 385.7
Intangible Assets, Gross (Excluding Goodwill) $ 654.1 $ 565.7
Weighted Average Useful Life (years) 10 years 6 months 11 years 6 months
Accumulated Amortization $ (230.4) $ (169.2)
Net Carrying Value 423.7 396.5
In process research and development    
Indefinite-lived Intangible Assets [Line Items]    
Net Carrying Value 10.8 10.8
Customer-based    
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Value 531.9 533.4
Accumulated Amortization (203.0) (156.3)
Net Carrying Value $ 328.9 $ 377.1
Weighted Average Useful Life (years) 11 years 7 months 6 days 11 years 7 months 6 days
Accumulated Amortization $ (203.0) $ (156.3)
Licensing agreements    
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Value 75.0  
Accumulated Amortization (10.2)  
Net Carrying Value $ 64.8  
Weighted Average Useful Life (years) 5 years  
Accumulated Amortization $ (10.2)  
Technology    
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Value 35.0 20.1
Accumulated Amortization (15.9) (11.8)
Net Carrying Value $ 19.1 $ 8.3
Weighted Average Useful Life (years) 7 years 8 years 6 months
Accumulated Amortization $ (15.9) $ (11.8)
Other    
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Value 1.4 1.4
Accumulated Amortization (1.3) (1.1)
Net Carrying Value $ 0.1 $ 0.3
Weighted Average Useful Life (years) 2 years 6 months 2 years 6 months
Accumulated Amortization $ (1.3) $ (1.1)