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Goodwill and Other Intangible Assets, Net - Other Intangible Assets (Detail) - USD ($) $ in Millions | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Finite-Lived Intangible Assets [Line Items] |  |
Finite-lived intangible total | $ 226.2 | $ 256.5
Accumulated amortization | (136.6) | (140.7)
Finite-live intangible asset, net | 89.6 | 115.8
Indefinite-lived intangibles | 16.8 | 22.2
Other Intangible Assets | 243.0 | 278.7
Other intangible assets, net | 106.4 | 138.0
Customer relationships |  |
Finite-Lived Intangible Assets [Line Items] |  |
Finite-lived intangible total | 163.3 | 176.3
Accumulated amortization | (101.7) | (99.6)
Finite-live intangible asset, net | 61.6 | 76.7
Proprietary technology |  |
Finite-Lived Intangible Assets [Line Items] |  |
Finite-lived intangible total | 46.7 | 58.4
Accumulated amortization | (23.4) | (28.1)
Finite-live intangible asset, net | 23.3 | 30.3
Patents and other |  |
Finite-Lived Intangible Assets [Line Items] |  |
Finite-lived intangible total | 16.2 | 21.8
Accumulated amortization | (11.5) | (13.0)
Finite-live intangible asset, net | $ 4.7 | $ 8.8

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