Balance Sheet Details - Property, Plant and Equipment (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 27, 2015	Dec. 28, 2014	Dec. 29, 2013
Property, Plant and Equipment [Line Items]
Property and equipment	$ 110.1	$ 109.1
Accumulated depreciation and amortization	(53.9)	(47.5)
Total property and equipment, net	56.2	61.6
Depreciation expense	12.5	13.3	$ 13.6
Land and buildings
Property, Plant and Equipment [Line Items]
Property and equipment	13.3	12.8
Computer equipment and software
Property, Plant and Equipment [Line Items]
Property and equipment	27.0	24.3
Machinery and equipment
Property, Plant and Equipment [Line Items]
Property and equipment	47.4	41.0
Furniture and office equipment
Property, Plant and Equipment [Line Items]
Property and equipment	5.8	10.0
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property and equipment	10.9	13.0
Construction in progress
Property, Plant and Equipment [Line Items]
Property and equipment	$ 5.7	$ 8.0