Common Stock (Details)
In Millions, unless otherwise specified
 12 Months Ended
Oct. 31, 2012
Common Stock Disclosure Details [Abstract]  
Amount of non-voting common stock shares authorized by the Company's Board of Directors to be repurchased under the share repurchase plan 8.0
Non-voting common stock shares repurchased and retired under the Company's current share repurchase plan during the period 4.0
Non-voting shares remaining to be repurchased and retired under the Company's current share repurchase plan as of the end of the period 3.9