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Other Intangible Assets - Summary of Other Intangible Assets (Detail) - USD ($) $ in Millions | Dec. 31, 2018 | Dec. 31, 2017
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Finite-Lived Intangible Assets [Line Items] |  |
Gross cost | $ 294.6 | $ 295.8
Accumulated amortization | (158.3) | (132.5)
Other Intangible Assets, Net | 136.3 | 163.3
Product Rights [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross cost | 34.0 | 34.0
Accumulated amortization | (20.1) | (16.4)
Brand Names [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross cost | 8.9 | 8.9
Accumulated amortization | (5.4) | (4.4)
Technology [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross cost | 55.1 | 55.1
Accumulated amortization | (19.1) | (15.7)
Customer and Distributor Relationships [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross cost | 125.6 | 127.5
Accumulated amortization | (53.5) | (43.2)
Patents [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross cost | 2.9 | 2.9
Accumulated amortization | (2.9) | (2.9)
Non-Compete Agreements [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross cost | 4.1 | 4.1
Accumulated amortization | (4.1) | (4.1)
Marketing Related [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross cost | 22.1 | 22.1
Accumulated amortization | (22.1) | (22.1)
Internally Developed Software [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross cost | 41.9 | 41.2
Accumulated amortization | $ (31.1) | $ (23.7)

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