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Euro Deposits (Details)
 12 Months Ended
Oct. 31, 2012
EUR (€)
Oct. 31, 2011
EUR (€)
Oct. 31, 2010
EUR (€)
Oct. 31, 2012
USD ($)
Oct. 31, 2011
USD ($)
Oct. 31, 2010
USD ($)
Euro Deposits (Textual) [Abstract]            
Euro principal deposits € 1,278,954,563 € 2,535,042,636 € 1,874,094,511      
Euro principal redemptions 1,258,988,057 2,629,658,330 1,983,555,915      
Euro principal withdrawals 558,994 64,021 1,274,352      
Euro principal balance € 203,682,161 € 184,274,649 € 278,954,364 $ 263,931,355 $ 257,026,161 $ 387,716,634
Interest rate on interest-bearing demand account       0.00%