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Goodwill (Details) - USD ($) $ in Millions	3 Months Ended
	Oct. 01, 2016	Jul. 02, 2016
Changes in goodwill
Balance at the beginning of the period	$ 152.1
Currency translation and other adjustments	(0.4)
Balance at the end of the period	151.7	$ 152.1
Network Enablement
Changes in goodwill
Balance at the beginning of the period	143.8
Currency translation and other adjustments	(0.4)
Balance at the end of the period	143.4	143.8
Goodwill impairment		0.0
Optical Security and Performance Products
Changes in goodwill
Balance at the beginning of the period	8.3
Currency translation and other adjustments	0.0
Balance at the end of the period	$ 8.3	8.3
Goodwill impairment		0.0
Service Enablement
Changes in goodwill
Goodwill impairment		$ 91.4

X

- Definition

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 50
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- Definition

Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

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

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- Definition

Amount of increase (decrease) from foreign currency translation adjustments and purchase accounting adjustments of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

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