Summary of Restricted Stock Unit Activity (Detail) (Restricted Stock Units (RSUs), USD $)	12 Months Ended
	Feb. 03, 2013		Jan. 29, 2012	Jan. 30, 2011
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Balance at January 29, 2012, shares	2,293,851
Granted, shares	1,276,183
Released, shares	(432,929)
Cancelled, shares	(364,679)
Balance at February 3, 2013, shares	2,772,426		2,293,851
Vested plus expected to vest at February 3, 2013, shares	1,956,461
Balance at January 29, 2012, weighted average grant date fair value	$ 29.74
Granted, weighted average grant date fair value	$ 37.94		$ 39.27	$ 28.13
Released, weighted average grant date fair value	$ 21.91
Cancelled, weighted average grant date fair value	$ 30.67
Balance at February 3, 2013, weighted average grant date fair value	$ 34.61		$ 29.74
Vested plus expected to vest at February 3, 2013, weighted average grant date fair value	$ 34.67
Balance at February 3, 2013, Weighted average contractual term remaining (years)	2 years 3 months 7 days
Vested plus expected to vest at February 3, weighted average contractual term remaining (years)	2 years 3 months 7 days
Balance at February 3, 2013, intrinsic value	$ 124,815,000	[1]
Vested plus expected to vest at February 3, 2013, intrinsic value	$ 88,080,000	[1]

[1] Intrinsic value for outstanding and unvested restricted stock units is based on the market value of our common stock on the last business day of the fiscal year (or $45.02).