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Acquisitions - Summary of Unaudited Pro Forma Financial Information Presents Combined Results of Operations (Detail) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Conexant Systems, LLC [Member]
Business Acquisition [Line Items]
Revenue	$ 425.5	$ 414.6
Net loss	$ (28.2)	$ (0.9)
Net loss per share	$ (0.84)	$ (0.03)
Marvell Technology Group Ltd [Member]
Business Acquisition [Line Items]
Revenue	$ 457.8	$ 413.8
Net loss	$ (25.2)	$ (0.6)
Net loss per share	$ (0.75)	$ (0.02)

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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- Definition

The pro forma basic net income per share for a period as if the business combination or combinations had been completed at the beginning of a period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (h)(2)-(3)
-URI http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463

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- Definition

The pro forma net Income or Loss for the period as if the business combination or combinations had been completed at the beginning of a period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (h)(2)-(3)
-URI http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463

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The pro forma revenue for a period as if the business combination or combinations had been completed at the beginning of the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (h)(2)-(3)
-URI http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463

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