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Other Intangible Assets, Net (Detail) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2019 | Dec. 31, 2018
Finite-Lived Intangible Assets [Line Items] |  |
Original amount | $ 79.0 | $ 69.9
Accumulated amortization | 36.2 | 28.9
Other intangible assets, net | $ 42.8 | 41.0
Minimum |  |
Finite-Lived Intangible Assets [Line Items] |  |
Estimated useful lives of intangible assets | 8 years |
Maximum |  |
Finite-Lived Intangible Assets [Line Items] |  |
Estimated useful lives of intangible assets | 20 years |
Core Technology |  |
Finite-Lived Intangible Assets [Line Items] |  |
Original amount | $ 53.5 | 44.4
Accumulated amortization | 15.4 | 9.7
Other intangible assets, net | 38.1 | 34.7
Trademarks and trade names |  |
Finite-Lived Intangible Assets [Line Items] |  |
Original amount | 25.5 | 25.5
Accumulated amortization | 20.8 | 19.2
Other intangible assets, net | $ 4.7 | $ 6.3
Trademarks and trade names | Minimum |  |
Finite-Lived Intangible Assets [Line Items] |  |
Estimated useful lives of intangible assets | 15 years |
Trademarks and trade names | Maximum |  |
Finite-Lived Intangible Assets [Line Items] |  |
Estimated useful lives of intangible assets | 20 years |

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