Goodwill (Details) $ in Millions	3 Months Ended
Sep. 29, 2018 USD ($)
Changes in goodwill
Balance at the beginning of the period	$ 336.3
Acquisitions	6.3
Currency translation adjustments	(1.5)
Balance at the end of the period	341.1
Network Enablement
Changes in goodwill
Balance at the beginning of the period	328.0
Acquisitions	6.3
Currency translation adjustments	(1.5)
Balance at the end of the period	332.8
Service Enablement
Changes in goodwill
Balance at the beginning of the period	0.0
Currency translation adjustments	0.0
Balance at the end of the period	0.0
Optical Security and Performance Products
Changes in goodwill
Balance at the beginning of the period	8.3
Currency translation adjustments	0.0
Balance at the end of the period	$ 8.3

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.

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Amount of increase (decrease) from adjustments after acquisition date under purchase accounting 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.

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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.

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