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Canadian Dollar Deposits - Additional Information (Detail)
6 Months Ended 12 Months Ended
Apr. 30, 2014
CAD
Oct. 31, 2013
CAD
Apr. 30, 2014
USD ($)
Oct. 31, 2013
USD ($)
Apr. 30, 2014
Redemptions Payable [Member]
USD ($)
Oct. 31, 2013
Redemptions Payable [Member]
USD ($)
Securities Financing Transaction [Line Items]            
Canadian dollar principal deposits 29,830,978 59,661,957        
Canadian dollar principal redemptions 84,521,106 198,873,188        
Canadian dollar principal balance 298,309,783 352,999,911 $ 271,820,842 [1] $ 338,495,383 $ 271,820,842 $ 338,495,383
[1] (Unaudited)