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Segment, Customers, and Geographic Information - Net Revenue from External Customers (Detail) - USD ($) $ in Millions | 3 Months Ended
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Sep. 30, 2017 | Sep. 30, 2016
Revenue from External Customer [Line Items] |  |
Net revenue | $ 417.4 | $ 386.2
Mobile Product Applications [Member] |  |
Revenue from External Customer [Line Items] |  |
Net revenue | 292.9 | 314.0
PC Product Applications [Member] |  |
Revenue from External Customer [Line Items] |  |
Net revenue | 65.3 | 54.9
Internet of Things Product Applications [Member] |  |
Revenue from External Customer [Line Items] |  |
Net revenue | $ 59.2 | $ 17.3

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- Definition Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
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