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Statements of Financial Condition (Parenthetical) (USD $)
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Oct. 31, 2012
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Oct. 31, 2011
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|---|---|---|
| Statements of Financial Condition [Abstract] | ||
| Redeemable capital shares, no par value | ||
| Redeemable capital shares, shares authorized | 33,500,000 | 28,500,000 |
| Redeemable capital shares, shares issued | 5,650,000 | 8,100,000 |
| Redeemable capital shares, shares outstanding | 5,650,000 | 8,100,000 |