Related Party Transactions (Details) - Viavi - Transactions with Viavi - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Dec. 26, 2015	Dec. 27, 2014	Dec. 26, 2015	Dec. 27, 2014
Related Party Transaction [Line Items]
Allocated costs	$ 0.0	$ 23.1	$ 11.7	$ 40.2
Selling, general and administrative
Related Party Transaction [Line Items]
Allocated costs	0.0	19.8	11.7	36.6
Restructuring and related charges
Related Party Transaction [Line Items]
Allocated costs	0.0	3.2	0.0	3.2
Interest and other (income) expenses, net
Related Party Transaction [Line Items]
Allocated costs	0.0	(0.1)	(0.1)	0.0
Interest expense
Related Party Transaction [Line Items]
Allocated costs	$ 0.0	$ 0.2	$ 0.1	$ 0.4