Goodwill (Details) $ in Millions	9 Months Ended
	Apr. 03, 2021 USD ($)
Changes in goodwill
Balance at the beginning of the period	$ 381.4
Currency translation adjustments	15.0
Balance at the end of the period	396.4
Network Enablement
Changes in goodwill
Balance at the beginning of the period	334.9
Currency translation adjustments	15.0
Balance at the end of the period	349.9
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