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Goodwill and Other Intangible Assets, Net - Other Intangible Assets (Detail) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2019 | Dec. 31, 2018
Finite-Lived Intangible Assets [Line Items] |  |
Finite-lived intangible total | $ 256.5 | $ 230.1
Accumulated amortization | (140.7) | (121.2)
Finite-live intangible asset, net | 115.8 | 108.9
Indefinite-lived intangibles | 22.2 | 27.2
Other Intangible Assets | 278.7 | 257.3
Other intangible assets, net | 138.0 | 136.1
Customer relationships |  |
Finite-Lived Intangible Assets [Line Items] |  |
Finite-lived intangible total | 176.3 | 164.1
Accumulated amortization | (99.6) | (86.2)
Finite-live intangible asset, net | $ 76.7 | 77.9
Finite-Lived Intangible Asset, Useful Life | 12 years 4 months 24 days |
Proprietary technology |  |
Finite-Lived Intangible Assets [Line Items] |  |
Finite-lived intangible total | $ 58.4 | 53.7
Accumulated amortization | (28.1) | (25.6)
Finite-live intangible asset, net | $ 30.3 | 28.1
Finite-Lived Intangible Asset, Useful Life | 12 years 7 months 6 days |
Patents and other |  |
Finite-Lived Intangible Assets [Line Items] |  |
Finite-lived intangible total | $ 21.8 | 12.3
Accumulated amortization | (13.0) | (9.4)
Finite-live intangible asset, net | $ 8.8 | $ 2.9
Finite-Lived Intangible Asset, Useful Life | 6 years 1 month 6 days |

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