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Stockholders' Equity (Details) (USD $)
In Millions, except Per Share data, unless otherwise specified
3 Months Ended
Feb. 29, 2012
Feb. 28, 2011
Stockholders' Equity (Textual) [Abstract]    
Repurchase of common stock Authorized 4  
Cash dividend declared per share $ 0.0625 $ 0.0625