Fair Value Hierarchy for Financial Assets (Cash Equivalents and Investments) Measured at Fair Value on Recurring Basis (Detail) (USD $) In Thousands, unless otherwise specified	May 04, 2013	Feb. 02, 2013	Apr. 28, 2012	Jan. 28, 2012
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	$ 383,175	$ 509,119	$ 713,443	$ 719,545
Short-term investments	113,041	121,873	8,587
Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	383,175	509,119	713,443
Short-term investments	113,041	121,873	8,587
Total	496,216	630,992	722,030
Fair Value, Measurements, Recurring | Cash
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	302,188	257,191	625,398
Fair Value, Measurements, Recurring | Money-market
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	54,954	221,929	51,915
Fair Value, Measurements, Recurring | Commercial paper
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	20,000	29,999	19,999
Fair Value, Measurements, Recurring | Treasury bills
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	6,033		16,131
Short-term investments	103,144	109,305	3,087
Fair Value, Measurements, Recurring | Term-deposits
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments	9,897	12,568
Fair Value, Measurements, Recurring | ARS | State and local government
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments			5,500
Fair Value, Measurements, Recurring | Quoted Market Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	383,175		713,443
Short-term investments	113,041		3,087
Total	496,216		716,530
Fair Value, Measurements, Recurring | Quoted Market Prices in Active Markets for Identical Assets (Level 1) | Cash
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	302,188		625,398
Fair Value, Measurements, Recurring | Quoted Market Prices in Active Markets for Identical Assets (Level 1) | Money-market
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	54,954		51,915
Fair Value, Measurements, Recurring | Quoted Market Prices in Active Markets for Identical Assets (Level 1) | Commercial paper
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	20,000		19,999
Fair Value, Measurements, Recurring | Quoted Market Prices in Active Markets for Identical Assets (Level 1) | Treasury bills
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	6,033		16,131
Short-term investments	103,144		3,087
Fair Value, Measurements, Recurring | Quoted Market Prices in Active Markets for Identical Assets (Level 1) | Term-deposits
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments	9,897
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments			5,500
Total			5,500
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) | ARS | State and local government
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments			$ 5,500