Acquisitions (Narrative) (Details)	3 Months Ended	9 Months Ended
	Oct. 28, 2012 Gennum [Member] USD ($)	Oct. 28, 2012 Gennum [Member] USD ($)	Jul. 29, 2012 Gennum [Member] USD ($)	May 27, 2012 Gennum [Member] USD ($)	Mar. 20, 2012 Gennum [Member] USD ($)	Mar. 20, 2012 Gennum [Member] CAD	Mar. 07, 2012 Cycleo [Member] USD ($)
Percentage of outstanding shares acquired					100.00%	100.00%
Price paid per share						13.55
Total acquisition consideration					$ 506,546,000
Long-term debt					347,000,000
Original issue discount on debt					3,000,000
Post-acquisition compensation expense		9,600,000
Goodwill increase, purchase accounting adjustments	4,400,000
Purchase price allocation, goodwill	262,800,000	262,800,000	258,400,000		262,815,000
Acquisition related costs expensed	1,500,000	21,900,000
Net sales attributable to acquiree	45,300,000	92,600,000
Net income (loss) attributable to acquiree	1,500,000	(49,800,000)
Settled pre-acquisition contingencies related to legal matters				4,200,000
Cash paid for acquisition							5,000,000
Deferred compensation potential cash payment							$ 16,000,000