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Goodwill and Intangible Assets - Summarized Amounts Reported as Intangible Assets (Detail) - USD ($) $ in Millions | Sep. 30, 2016 | Jun. 30, 2016
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Intangible Assets [Line Items] |  |
Gross Carrying Amount, amortizable intangible assets | $ 535.8 | $ 236.4
Gross Carrying Amount, total intangible assets | 558.5 | 259.0
Accumulated Amortization | (37.3) | (31.5)
Net, amortizable intangible assets | 498.5 | 204.9
Net, total intangible assets | 521.2 | 227.5
Net, non-amortizable intangible assets | 22.7 | 22.6
In-Process Research and Development |  |
Intangible Assets [Line Items] |  |
Net, non-amortizable intangible assets | 22.7 | 22.6
Purchased Licenses and Technologies |  |
Intangible Assets [Line Items] |  |
Gross Carrying Amount, amortizable intangible assets | 528.1 | 228.7
Accumulated Amortization | (34.1) | (28.5)
Net, amortizable intangible assets | 494.0 | 200.2
Customer Relationships |  |
Intangible Assets [Line Items] |  |
Gross Carrying Amount, amortizable intangible assets | 4.7 | 4.7
Accumulated Amortization | (2.5) | (2.4)
Net, amortizable intangible assets | 2.2 | 2.3
Trademarks |  |
Intangible Assets [Line Items] |  |
Gross Carrying Amount, amortizable intangible assets | 3.0 | 3.0
Accumulated Amortization | (0.7) | (0.6)
Net, amortizable intangible assets | $ 2.3 | $ 2.4

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