Discontinued Operations - Statement of Operations (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Apr. 01, 2017	Apr. 02, 2016	Apr. 01, 2017	Apr. 02, 2016
Operating expenses:
Provision for income taxes		$ (6.1)
Income (loss) from discontinued operations, net of taxes	$ 0.0	$ 5.0	$ 0.0	$ (45.4)
Spinoff | Lumentum
Discontinued Operations
Net revenues				66.5
Cost of revenues				49.8
Amortization of acquired technologies				0.6
Gross profit				16.1
Operating expenses:
Research and development				12.5
Selling, general and administrative				24.7
Restructuring charges				0.1
Total operating expenses				37.3
Loss from operations				(21.2)
Interest and other income (expense), net				0.0
Loss before income taxes				(21.2)
Provision for income taxes				24.4
Net loss from discontinued operations				$ (45.6)