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Canadian Dollar Deposits - Additional Information (Detail)
12 Months Ended
Oct. 31, 2013
CAD
Oct. 31, 2012
CAD
Oct. 31, 2011
CAD
Oct. 31, 2013
USD ($)
Oct. 31, 2012
USD ($)
Oct. 31, 2011
USD ($)
Deposits [Abstract]            
Canadian dollar principal deposits 59,661,957 14,915,489 765,661,775      
Canadian dollar principal redemptions 198,873,188 154,126,721 715,943,476      
Canadian dollar principal balance 352,999,911 492,211,142 631,422,374 $ 338,495,383 $ 492,457,371 $ 635,713,440