Discontinued Operations - Additional Information (Details) - USD ($) shares in Millions, $ in Millions		3 Months Ended	9 Months Ended
	Aug. 01, 2015	Apr. 02, 2016	Apr. 02, 2016	Apr. 01, 2017
Discontinued Operations
Net income tax provision (benefit) for discontinued operations		$ (6.1)
Spinoff | Lumentum
Discontinued Operations
Net income tax provision (benefit) for discontinued operations			$ 24.4
Transaction, advisory and other costs to effect the separation		$ 1.1	16.5
Spinoff | Lumentum | Discontinued Operations
Discontinued Operations
Net income tax provision			17.1
Spinoff | Lumentum | Federal and State
Discontinued Operations
Net income tax provision (benefit) for discontinued operations			$ 7.6
Lumentum
Discontinued Operations
Percentage of outstanding shares distributed	80.10%
Stock conversion ratio in distribution	0.2
Cash contributions agreed to in spin-off	$ 137.6
Retained ownership percentage	19.90%
Shares held in investment (in shares)	11.7			0.4
Minimum holding period for retained interest	6 months
Maximum holding period for retained interest	3 years