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Operating Segments and Geographic Information - Customer Concentration Risk (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Jul. 01, 2017	Apr. 01, 2017	Dec. 31, 2016	Oct. 01, 2016	Jul. 02, 2016	Apr. 02, 2016	Jan. 02, 2016	Oct. 03, 2015	Jul. 01, 2017	Jul. 02, 2016	Jun. 27, 2015
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenue	$ 198.1	$ 196.0	$ 206.5	$ 210.8	$ 224.1	$ 220.4	$ 232.1	$ 229.7	$ 811.4	$ 906.3	$ 873.9
Customer Concentration Risk | Customer A - OSP customer | OSP
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenue									$ 166.8	$ 190.1	$ 143.0

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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.

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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

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