Shareholders' Equity - Share Repurchase Program (Details) (USD $) Share data in Thousands	6 Months Ended			1 Months Ended			6 Months Ended	3 Months Ended
	Jul. 30, 2011	Jan. 29, 2011	Jul. 31, 2010	Mar. 31, 2010 2010 Repurchase Program [Member] Common Stock [Member]	Dec. 31, 2009 2010 Repurchase Program [Member] Common Stock [Member]	May 31, 2011 2011 Repurchase Program [Member] Common Stock [Member]	Jul. 30, 2011 2011 Repurchase Program [Member] Common Stock [Member]	Jul. 30, 2011 Common Stock [Member]
Equity, Class of Treasury Stock [Line Items]
Stock Repurchase Program, Authorized Amount				$ 400,000,000	$ 150,000,000	$ 400,000,000
Stock Repurchase Program, Increase to Repurchase Program				250,000,000
Stock Repurchased During Period, Shares								7,200
Stock Repurchased During Period, Value	240,654,000	108,363,000	242,460,000					236,000,000
Stock Repurchase Program, Remaining Authorized Repurchase Amount							$ 221,800,000