Goodwill (Details) $ in Millions	3 Months Ended
	Oct. 03, 2020 USD ($)
Changes in goodwill
Balance at the beginning of the period	$ 381.4
Currency translation adjustments	6.5
Balance at the end of the period	387.9
Network Enablement
Changes in goodwill
Balance at the beginning of the period	334.9
Currency translation adjustments	6.5
Balance at the end of the period	341.4
Service Enablement
Changes in goodwill
Balance at the beginning of the period	4.3
Currency translation adjustments	0.0
Balance at the end of the period	4.3
Optical Security and Performance Products
Changes in goodwill
Balance at the beginning of the period	42.2
Currency translation adjustments	0.0
Balance at the end of the period	$ 42.2