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Euro Deposits (Details)
 3 Months Ended 12 Months Ended
Jan. 31, 2013
EUR (€)
Oct. 31, 2012
EUR (€)
Jan. 31, 2013
USD ($)
Oct. 31, 2012
USD ($)
Euro Deposits (Textual) [Abstract]        
Euro principal deposits € 238,182,268 € 1,278,954,563    
Euro principal redemptions 238,197,717 1,258,988,057    
Euro principal withdrawals 200,733 558,994    
Euro principal balance € 203,465,979 € 203,682,161 $ 276,184,540 $ 263,931,355
Interest rate on interest-bearing demand account     0.00%