Restructuring and Other Items (Details Textual) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jul. 01, 2012	Jul. 03, 2011	Jul. 01, 2012	Jul. 03, 2011
Restructuring Cost and Reserve [Line Items]
Acquisition related costs			$ 8.4
Restructuring and Other Items (Textual) [Abstract]
Costs of transition service agreements	1.9	1.3	6.5	1.3
Property write down charges	2.4
Sales and use tax liability		14.5		14.5
Lease terminations [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Activities, Completion Date			Dec. 31, 2013
Employee severance and benefits [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Activities, Completion Date			Dec. 31, 2013
Sand Force acquisition [Member] | Other items, net [Member]
Restructuring Cost and Reserve [Line Items]
Acquisition related costs			$ 8.4