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Goodwill and Intangible Assets - Summarized Amounts Reported as Intangible Assets (Detail) - USD ($) $ in Millions | Jun. 30, 2018 | Jun. 30, 2017
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Intangible Assets [Line Items] |  |
Gross Carrying Amount, amortizable intangible assets | $ 534.0 | $ 533.3
Gross Carrying Amount, total intangible assets | 557.5 | 556.4
Accumulated Amortization | (102.3) | (64.9)
Net, amortizable intangible assets | 431.7 | 468.4
Net, total intangible assets | 455.2 | 491.5
Net, non-amortizable intangible assets | 23.5 | 23.1
In-Process Research and Development [Member] |  |
Intangible Assets [Line Items] |  |
Net, non-amortizable intangible assets | 23.5 | 23.1
Purchased Licenses and Technologies [Member] |  |
Intangible Assets [Line Items] |  |
Gross Carrying Amount, amortizable intangible assets | 526.4 | 525.7
Accumulated Amortization | (98.0) | (61.3)
Net, amortizable intangible assets | 428.4 | 464.4
Customer Relationships [Member] |  |
Intangible Assets [Line Items] |  |
Gross Carrying Amount, amortizable intangible assets | 4.6 | 4.6
Accumulated Amortization | (3.3) | (2.8)
Net, amortizable intangible assets | 1.3 | 1.8
Trademarks [Member] |  |
Intangible Assets [Line Items] |  |
Gross Carrying Amount, amortizable intangible assets | 3.0 | 3.0
Accumulated Amortization | (1.0) | (0.8)
Net, amortizable intangible assets | $ 2.0 | $ 2.2

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