Balance Sheet Details - Property, Plant and Equipment (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 29, 2019	Dec. 30, 2018	Dec. 31, 2017
Property, Plant and Equipment [Line Items]
Finance lease right of use assets	$ 39.6
Property and equipment		$ 135.7
Property and equipment	198.6
Accumulated depreciation and amortization	(81.7)
Accumulated depreciation and amortization		(68.6)
Total property and equipment, net	116.9
Total property and equipment, net	116.9	67.1
Depreciation expense	16.0	12.0	$ 11.8
Land and buildings
Property, Plant and Equipment [Line Items]
Property and equipment	12.2	11.9
Computer equipment and software
Property, Plant and Equipment [Line Items]
Property and equipment	32.7	28.3
Machinery and equipment
Property, Plant and Equipment [Line Items]
Property and equipment	78.7	56.8
Furniture and office equipment
Property, Plant and Equipment [Line Items]
Property and equipment	7.1	6.3
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property and equipment	12.3	10.9
Construction in progress
Property, Plant and Equipment [Line Items]
Property and equipment	$ 16.0	$ 21.5