Stock Based Compensation (Summary Of The Activity For Stock Option Awards) (Details) (Stock Options Awards [Member], USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Jan. 29, 2012 years		Jan. 30, 2011		Jan. 31, 2010
Stock Options Awards [Member]
Shares
Beginning balance	6,622		9,151		9,394
Options granted	343		403		1,334	[1]
Options exercised	(2,781)		(2,329)		(830)
Options cancelled/forfeited	(494)		(603)		(747)
Ending balance	3,690		6,622		9,151
Exercisable at end of the period	2,767
Expected to vest after January 29, 2012	786
Weighted Average Exercise Price (per share)
Beginning balance	$ 16.84
Options granted	$ 24.05		$ 17.61		$ 10.05	[1]
Options exercised	$ 16.64		$ 14.22
Options cancelled/forfeited	$ 22.30		$ 21.35
Ending balance	$ 16.94		$ 16.84
Exercisable at end of the period	$ 16.42
Expected to vest after January 29, 2012	$ 18.30
Aggregate intrinsic value
Beginning balance	$ 35,492	[2]	$ 8,998	[2]	$ 342	[2]
Options exercised	22,537	[2]	11,495	[2]	2,324	[2]
Ending balance	44,435	[2]	35,492	[2]	8,998	[2]
Exercisable at end of the period	34,738	[2]
Expected to vest after January 29, 2012	8,379	[2]
Aggregate unrecognized compensation
Beginning balance	7,067		9,436		16,275
Ending balance	$ 4,699		$ 7,067		$ 9,436
Number of shares exercisable
Beginning balance	5,160		6,302		6,070
Ending balance	2,767		5,160		6,302
Weighted average contractual term (years)
Exercisable at end of the period, years	2.41
Expected to vest after January 29, 2012, years	4.58

[1] Includes the replacement awards issued to employees of SMI who held unvested SMI options on December 9, 2009.

[2] Represents the difference between the exercise price and the value of the Company's stock at the time of exercise, for exercised grants. For outstanding awards, represents the difference between the exercise price and the value of the Company's stock at fiscal year end.