Commitments and Contingencies (Details) (USD $)	9 Months Ended
	Oct. 26, 2014		Jan. 26, 2014
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
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

[1] Please refer to Note 12 of these Notes to Condensed Consolidated Financial Statements for discussion regarding the 3dfx litigation.