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Redeemable Capital Shares (Schedule Of Activity In Redeemable Capital Shares) (Details) (USD $)
 12 Months Ended
Oct. 31, 2011
Oct. 31, 2010
Oct. 31, 2009
Redeemable Capital Shares [Abstract]      
Redeemable capital shares, Beginning Balance, Shares 2,800,000 3,900,000 3,950,000
Shares issued, shares 25,450,000 18,800,000 4,050,000
Shares redeemed, shares (26,400,000) (19,900,000) (4,100,000)
Adjustment to period Shares due to currency movement and other, shares         
Redeemable capital shares, Ending Balance, Shares 1,850,000 2,800,000 3,900,000
Redeemable capital shares, Beginning Balance $ 387,741,044 $ 574,795,922 $ 502,378,480
Common stock issued, value 3,532,613,866 2,527,532,186 553,905,548
Shares redeemed, value (3,664,496,177) (2,675,163,019) (560,619,175)
Adjustment to period Shares due to currency movement and other 1,238,001 (39,424,045) 79,131,069
Redeemable capital Shares, ending Balance $ 257,096,734 $ 387,741,044 $ 574,795,922