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Stockholders' Equity And Benefit Plans (Schedule Of Common Stock Repurchase Activity) (Details) (USD $)
Share data in Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2011
Jan. 01, 2011
Dec. 31, 2011
Period Authorized Fiscal Year 2010 No Termination Date [Member]
Jan. 01, 2011
Period Authorized Fiscal Year 2010 No Termination Date [Member]
Dec. 31, 2011
Period Authorized Fiscal Year 2010 Termination Date December 2013 [Member]
Jan. 01, 2011
Period Authorized Fiscal Year 2010 Termination Date December 2013 [Member]
Jan. 01, 2011
Period Authorized Fiscal Year 2009 No Termination Date [Member]
Jan. 02, 2010
Period Authorized Fiscal Year 2009 No Termination Date [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Number of Shares Repurchased   3,100 0 0 3,100 3,100 500  
Repurchase of common stock $ (270,882,000) $ (199,222,000) $ 0 $ 0 $ 270,900,000 $ 179,200,000 $ 20,000,000  
Dollar Value Authorized $ 330,000,000     $ 30,000,000   $ 750,000,000   $ 20,000,000
Common stock repurchase activity Termination Date       None   December 2013   Completed