Balance Sheet and Other Details (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Jun. 27, 2015	Mar. 28, 2015	Dec. 27, 2014	Sep. 27, 2014	Jun. 28, 2014	Mar. 29, 2014	Dec. 28, 2013	Sep. 28, 2013	Jun. 27, 2015	Jun. 28, 2014	Jun. 29, 2013
Accounts receivable allowance
Accounts receivable allowance	$ 1.2				$ 0.1				$ 1.2	$ 0.1
Inventories
Finished goods	60.1				50.6				60.1	50.6
Work in process	23.4				31.2				23.4	31.2
Raw materials and purchased parts	16.2				14.7				16.2	14.7
Inventories	99.7				96.5				99.7	96.5
Prepayments and other current assets
Prepayments	20.4				15.4				20.4	15.4
Advances to contract manufacturers	9.5				8.6				9.5	8.6
Other current assets	16.2				9.1				16.2	9.1
Prepayments and other current assets	46.1				33.1				46.1	33.1
Property, plant and equipment
Property, plant and equipment, gross	416.2				377.7				416.2	377.7
Less: Accumulated depreciation	(273.0)				(241.2)				(273.0)	(241.2)
Property, plant and equipment, net	143.2				136.5				143.2	136.5
Depreciation expense									43.0	35.5	$ 33.6
Other current liabilities
Warranty accrual	2.8				2.7				2.8	2.7
Restructuring accrual	3.2				2.2				3.2	2.2
VAT liabilities	0.2				2.8				0.2	2.8
Other	5.2				3.8				5.2	3.8
Other current liabilities	11.4				11.5				11.4	11.5
Other non-current liabilities
Long-term taxes payable	0.1				8.9				0.1	8.9
Pension accrual	2.1				1.6				2.1	1.6
Asset retirement obligation	1.8				0.9				1.8	0.9
Deferred rent	1.7				2.3				1.7	2.3
Severance accrual	1.7				0.0				1.7	0.0
Other	2.4				5.9				2.4	5.9
Other non-current liabilities	9.8				19.6				9.8	19.6
Interest and other income (expense), net
Foreign exchange gains (losses), net									(0.3)	1.6	1.1
Other income (expense), net									(0.1)	(0.3)	(0.3)
Interest and other income (expense), net	(0.3)	$ (0.1)	$ 0.1	$ (0.1)	(0.1)	$ 1.1	$ 0.3	$ 0.0	(0.4)	1.3	$ 0.8
Land
Property, plant and equipment
Property, plant and equipment, gross	5.9				5.9				5.9	5.9
Buildings and improvements
Property, plant and equipment
Property, plant and equipment, gross	28.6				28.1				28.6	28.1
Machinery and equipment
Property, plant and equipment
Property, plant and equipment, gross	326.4				299.4				326.4	299.4
Furniture and fixtures and software
Property, plant and equipment
Property, plant and equipment, gross	8.0				8.2				8.0	8.2
Leasehold improvements
Property, plant and equipment
Property, plant and equipment, gross	20.5				20.0				20.5	20.0
Construction in progress
Property, plant and equipment
Property, plant and equipment, gross	$ 26.8				$ 16.1				$ 26.8	$ 16.1