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Acquired Developed Technology and Other Intangibles - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Oct. 03, 2015	Jul. 01, 2017	Jul. 02, 2016	Jun. 27, 2015
Acquired developed technology, customer relationships and other intangibles
Amortization expense		$ 28.3	$ 31.9	$ 51.4
Acquired developed technology
Acquired developed technology, customer relationships and other intangibles
Useful life of intangible assets	36 months			52 months
Network Instruments, LLC (Network Instruments) | Acquired developed technology
Acquired developed technology, customer relationships and other intangibles
Intangible assets transferred from indefinite to finite-lived intangible assets				$ 1.7
Trendium Inc. (Trendium) | Acquired developed technology
Acquired developed technology, customer relationships and other intangibles
Intangible assets transferred from indefinite to finite-lived intangible assets	$ 1.8
Trendium Inc. (Trendium) | In-process research and development
Acquired developed technology, customer relationships and other intangibles
Impairment charge				$ 3.6

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Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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The amount of impairment loss recognized in the period resulting from the write-down of the carrying amount of a finite-lived intangible asset to fair value.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 3
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16373-109275

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