Business Combinations (Details) (USD $)	6 Months Ended
	Jul. 29, 2012	Jan. 29, 2012
Business Acquisition, Purchase Price Allocation, Assets Acquired (Liabilities Assumed), Net [Abstract]
Retention Bonus	$ 68,000,000
No. of years for retention bonus payout	4
Deferred Tax Assets, Net, Current	49,931,000	49,931,000
Goodwill	641,030,000	641,030,000
Deferred Tax Liabilities, Noncurrent	(143,165,000)	(133,288,000)
Net assets acquired	352,200,000
Icera Business Acquisition [Member]
Business Acquisition, Purchase Price Allocation, Assets Acquired (Liabilities Assumed), Net [Abstract]
Cash acquired	3,315,000
Accounts receivable	13,740,000
Inventory	13,510,000
Prepaid and other current assets	1,972,000
Deferred Tax Assets, Net, Current	13,036,000
Property, plant and equipment	3,649,000
Goodwill	271,186,000
Acquired intangible asset	97,515,000
Other assets	591,000
Total assets acquired	418,514,000
Accounts payable	(6,026,000)
Accrued liabilities	(38,735,000)
Notes payable	(10,319,000)
Income Taxes payable	(4,558,000)
Deferred Tax Liabilities, Noncurrent	(6,677,000)
Net assets acquired	$ 352,199,000