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Acquisitions - Summary of Unaudited Pro Forma Financial Information Presents Combined Results of Operations (Detail) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Jun. 30, 2018	Jun. 24, 2017
Conexant Systems, LLC [Member]
Business Acquisition [Line Items]
Revenue	$ 1,638.4	$ 1,829.0
Net income/(loss)	$ (124.4)	$ 34.9
Net income/(loss) per share	$ (3.64)	$ 1.01
Marvell Technology Group Ltd [Member]
Business Acquisition [Line Items]
Revenue	$ 1,670.7	$ 1,793.6
Net income/(loss)	$ (123.6)	$ 27.7
Net income/(loss) per share	$ (3.61)	$ 0.82

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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/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 50
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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/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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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/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (h)(2)
-URI http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463

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