Balance Sheet Details - Property, Plant and Equipment (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 29, 2013	Dec. 30, 2012	Dec. 25, 2011
Property, Plant and Equipment [Line Items]
Property and equipment	$ 134.9	$ 120.8
Accumulated depreciation and amortization	(50.1)	(35.2)
Total property and equipment, net	84.8	85.6
Depreciation expense	17.2	14.1	10.0
Land and buildings
Property, Plant and Equipment [Line Items]
Property and equipment	21.0	20.8
Computer equipment and software
Property, Plant and Equipment [Line Items]
Property and equipment	20.0	17.2
Machinery and equipment
Property, Plant and Equipment [Line Items]
Property and equipment	59.0	49.9
Furniture and office equipment
Property, Plant and Equipment [Line Items]
Property and equipment	15.4	12.2
Facility under capital lease
Property, Plant and Equipment [Line Items]
Property and equipment	1.0	1.0
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property and equipment	13.7	13.9
Construction in progress
Property, Plant and Equipment [Line Items]
Property and equipment	$ 4.8	$ 5.8