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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)

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