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Shareholders' Equity - Share Repurchase Program (Details) (USD $)
Share data in Thousands, unless otherwise specified
3 Months Ended 9 Months Ended 1 Months Ended 3 Months Ended
Jan. 28, 2012
Oct. 27, 2012
Oct. 29, 2011
Oct. 27, 2012
Common Stock [Member]
May 31, 2011
2011 Repurchase Program [Member]
Common Stock [Member]
May 31, 2012
2012 Repurchase Program [Member]
Common Stock [Member]
Oct. 27, 2012
2012 Repurchase Program [Member]
Common Stock [Member]
Equity, Class of Treasury Stock [Line Items]              
Stock Repurchase Program, Authorized Amount         $ 400,000,000 $ 200,000,000  
Stock Repurchased During Period, Shares       8,100     1,600
Stock Repurchased During Period, Value $ 46,236,000 $ 304,038,000 $ 317,721,000 $ 298,500,000     $ 51,300,000