Stock Repurchase Program (Details) (USD $)			3 Months Ended
	Apr. 28, 2012	Jan. 28, 2012	Apr. 28, 2012 Under August 2004 Authorization [Member]	Apr. 28, 2012 Under November 2009 Authorization [Member]	Apr. 30, 2011 Under November 2009 Authorization [Member]
Equity, Class of Treasury Stock [Line Items]
Amount authorized under stock repurchase program			$ 250,000,000	$ 250,000,000
Shares of common stock repurchased during the period (in shares)				316,960	732,547
Shares acquired from holders of restricted stock unit awards to satisfy tax withholding requirements (in shares)				59,495	35,547
Value of common stock repurchased during current period				16,800,000	23,700,000
Value of tax withholding payments related to shares acquired from holders of restricted stock unit awards				3,100,000	1,100,000
Value of shares of common stock remaining available for repurchase under the program				131,100,000
Shares of common stock repurchased to date (in shares)	11,437,000	11,120,040	7,761,813	11,437,000
Value of common stock repurchased to date	$ 290,218,000	$ 273,416,000	$ 166,900,000	$ 290,200,000