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Statements Of Financial Condition (Parenthetical) (USD $)
Oct. 31, 2011
Oct. 31, 2010
Statements Of Financial Condition [Abstract]    
Redeemable Capital Shares, no par value      
Redeemable Capital Shares, shares authorized 82,000,000 67,000,000
Redeemable Capital Shares, shares issued 1,850,000 2,800,000
Redeemable Capital Shares, shares outstanding 1,850,000 2,800,000