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Discontinued Operations (Details) - USD ($) shares in Millions, $ in Millions		3 Months Ended
	Aug. 01, 2015	Oct. 03, 2015	Oct. 01, 2016
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
Spinoff \| Lumentum
Discontinued Operations
Net income tax provision for discontinued operations		$ 35.0
Transaction, advisory and other costs to effect the separation		14.0
Spinoff \| Lumentum \| Discontinued Operations
Discontinued Operations
Net income tax provision		29.6
Spinoff \| Lumentum \| Federal and State
Discontinued Operations
Net income tax provision for discontinued operations		$ 5.6
Lumentum
Discontinued Operations
Retained ownership percentage	19.90%
Shares held in investment (in shares)	11.7		3.4