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Acquired Intangibles and Goodwill - Schedule of Expected Annual Aggregate Amortization Expense (Detail) - USD ($) $ in Millions | Mar. 31, 2018 | Jun. 30, 2017
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Goodwill And Intangible Assets Disclosure [Abstract] |  |
Remainder of 2018 | $ 20.9 |
2019 | 71.7 |
2020 | 48.2 |
2021 | 35.3 |
2022 | 25.8 |
2023 | 3.2 |
Thereafter | 0.7 |
To be determined | 3.6 |
Acquired intangibles, net | $ 209.4 | $ 101.0

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- Definition Amount of amortization expense for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized in the remainder of the fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References No definition available. + Details
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- Definition Amount of amortization expense for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized during the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + 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)(3) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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