Operating Segments and Geographic Information (Details) $ in Millions	3 Months Ended
Oct. 01, 2016 USD ($) subsegment segment	Oct. 03, 2015 USD ($)
Information on reportable segments
Number of broad business categories (in segment) \| segment	2
Net revenue	$ 210.8	$ 229.7
Gross profit	$ 125.1	$ 140.5
Gross margin (as a percent)	59.30%	61.20%
Operating income (loss)	$ 10.1	$ (2.9)
Operating margin (as a percent)	4.80%	(1.30%)
Segment Measures
Information on reportable segments
Net revenue	$ 210.8	$ 229.7
Gross profit	$ 130.3	$ 146.1
Gross margin (as a percent)	61.80%	63.60%
Operating income (loss)	$ 27.5	$ 28.7
Operating margin (as a percent)	13.00%	12.50%
Reconciling Items
Information on reportable segments
Net revenue	$ 0.0	$ 0.0
Gross profit	(5.2)	(5.6)
Operating income (loss)	$ (17.4)	(31.6)
Network and Service Enablement
Information on reportable segments
Number of subsegment (in subsegment) \| subsegment	2
Network and Service Enablement \| Segment Measures
Information on reportable segments
Net revenue	$ 155.0	165.5
Gross profit	$ 98.7	$ 109.1
Gross margin (as a percent)	63.70%	65.90%
Operating income (loss)	$ 4.1	$ 2.4
Operating margin (as a percent)	2.60%	1.50%
Optical Security and Performance Products \| Segment Measures
Information on reportable segments
Net revenue	$ 55.8	$ 64.2
Gross profit	$ 31.6	$ 37.0
Gross margin (as a percent)	56.60%	57.60%
Operating income (loss)	$ 23.4	$ 26.3
Operating margin (as a percent)	41.90%	41.00%
Network Enablement \| Segment Measures
Information on reportable segments
Net revenue	$ 118.6	$ 117.6
Gross profit	$ 77.4	$ 75.7
Gross margin (as a percent)	65.30%	64.40%
Service Enablement \| Segment Measures
Information on reportable segments
Net revenue	$ 36.4	$ 47.9
Gross profit	$ 21.3	$ 33.4
Gross margin (as a percent)	58.50%	69.70%

Aggregate revenue less cost of goods and services sold or operating expenses directly attributable to the revenue generation activity.

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 210.5-03.1,2)
-URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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