Goodwill (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Jun. 27, 2015	Apr. 02, 2016
Changes in goodwill
Balance at the beginning of the period		$ 255.5
Currency translation and other adjustments		(4.2)
Goodwill allocation - WaveReady		(6.0)
Balance at the end of the period	$ 255.5	245.3
Goodwill impairment	0.0
Network Enablement
Changes in goodwill
Balance at the beginning of the period		154.5
Currency translation and other adjustments		(2.7)
Goodwill allocation - WaveReady		(6.0)
Balance at the end of the period	154.5	145.8
Service Enablement
Changes in goodwill
Balance at the beginning of the period		92.7
Currency translation and other adjustments		(1.5)
Goodwill allocation - WaveReady		0.0
Balance at the end of the period	92.7	91.2
Optical Security and Performance Products
Changes in goodwill
Balance at the beginning of the period		8.3
Currency translation and other adjustments		0.0
Goodwill allocation - WaveReady		0.0
Balance at the end of the period	$ 8.3	$ 8.3