Balance Sheet Components (Details) (USD $)	Jul. 28, 2013		Jan. 27, 2013
Inventories
Raw materials	$ 119,491,000		$ 157,990,000
Work in-process	64,937,000		67,352,000
Finished goods	193,852,000		187,125,000
Total inventories	378,280,000		412,467,000
Outstanding Inventory Purchase Obligations	457,600,000
Prepaid Expenses and Other Current assets:
Prepaid maintenance	17,619,000		18,013,000
Prepaid insurance	3,369,000		3,729,000
Prepaid taxes	13,644,000		9,785,000
Prepaid rent	3,019,000		2,909,000
Assets held for sale (1)	7,547,000		0
Testing materials	8,601,000		7,219,000
Other	28,077,000		35,265,000
Total prepaid expenses and other	81,876,000		76,920,000
Accrued Liabilities
Deferred revenue	267,252,000		273,605,000
Accrued customer programs (1)	158,576,000	[1]	163,406,000	[1]
Warranty accrual (2)	17,474,000	[2]	14,874,000	[2]
Accrued payroll and related expenses	104,727,000		98,977,000
Accrued legal settlement (3)	30,600,000	[3]	30,600,000	[3]
Taxes payable, short term	6,576,000		3,173,000
Other	40,315,000		35,160,000
Total accrued liabilities and other	625,520,000		619,795,000
Other Long-term Liabilities
Deferred income tax liability	197,039,000		192,950,000
Income taxes payable, long term	114,830,000		115,267,000
Asset retirement obligation	10,377,000		10,165,000
Deferred Revenue	104,011,000		236,152,000
Liabilites other noncurrent	17,686,000		34,787,000
Total other long-term liabilities	$ 443,943,000		$ 589,321,000

[1] Please refer to Note 1 of these Notes to Condensed Consolidated Financial Statements for discussion regarding the nature of accrued customer programs and their accounting treatment related to our revenue recognition policies and estimates.

[2] Please refer to Note 10 of these Notes to Condensed Consolidated Financial Statements for discussion regarding the warranty accrual.

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