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Goodwill and Intangible Assets - Summarized Amounts Reported as Intangible Assets (Detail) - USD ($) $ in Millions | Dec. 31, 2017 | Jun. 30, 2017
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Intangible Assets [Line Items] |  |
Gross Carrying Amount, amortized intangible assets | $ 534.8 | $ 533.3
Gross Carrying Amount, total intangible assets | 558.8 | 556.4
Accumulated Amortization | (83.6) | (64.8)
Net, amortized intangible assets | 451.2 | 468.5
Net, total intangible assets | 475.2 | 491.6
Net, non-amortizable intangible assets | 24.0 | 23.1
In-Process Research and Development [Member] |  |
Intangible Assets [Line Items] |  |
Net, non-amortizable intangible assets | 24.0 | 23.1
Purchased Licenses and Technologies [Member] |  |
Intangible Assets [Line Items] |  |
Gross Carrying Amount, amortized intangible assets | 527.2 | 525.7
Accumulated Amortization | (79.6) | (61.2)
Net, amortized intangible assets | 447.6 | 464.5
Customer Relationships [Member] |  |
Intangible Assets [Line Items] |  |
Gross Carrying Amount, amortized intangible assets | 4.6 | 4.6
Accumulated Amortization | (3.1) | (2.8)
Net, amortized intangible assets | 1.5 | 1.8
Trademarks [Member] |  |
Intangible Assets [Line Items] |  |
Gross Carrying Amount, amortized intangible assets | 3.0 | 3.0
Accumulated Amortization | (0.9) | (0.8)
Net, amortized intangible assets | $ 2.1 | $ 2.2

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- Definition Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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- Definition Sum of the carrying amounts of all intangible assets, excluding goodwill, as of the balance sheet date, net of accumulated amortization and impairment charges. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16212-109274 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph ((a)(1),(b)) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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