Commitments and Contingencies (Details) (USD $)	6 Months Ended
	Jul. 28, 2013		Jan. 27, 2013
Notes to financial statements [Abstract]
Aggregate purchase price of acquisition paid initially, net of direct costs	$ 70,000,000
Excess of assessed fair value over acquisition price paid	50,000,000
Assessed value of asset purchase	108,000,000
Accrued legal settlement	30,600,000	[1]	30,600,000	[1]
Various administrative expenses and Trustee fees included in conditional settlement payment	5,600,000
Conditional settlement assessed to satisfy debts and liabilities owed to the general unsecured creditors of 3dfx	25,000,000
Net warranty charge against cost of revenue	181,200,000
Net warranty charge against sales, general, and administrative expense	$ 12,700,000

[1] Please refer to Note 11 of these Notes to Condensed Consolidated Financial Statements for discussion regarding the 3dfx litigation.