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Related Parties - Sponsor, Trustee, Custodian and Marketing Agent Fees - Additional Information (Detail) (USD $) | 12 Months Ended
--- | ---
Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2011
Trustee minimum fee | $ 500,000 |  |
Trustee maximum fee | 2,000,000 |  |
Sponsor [Member] |  |  |
Related party fees payable at annual rate | 0.15% |  |
Trustee [Member] |  |  |
Related party fees payable at annual rate | 0.02% |  |
Custodian Tier One [Member] |  |  |
Related party fees payable at annual rate | 0.10% |  |
Aggregate weight of gold to determine custodian fee tiers | 4,500,000 |  |
Custodian Tier Two [Member] |  |  |
Related party fees payable at annual rate | 0.06% |  |
Aggregate weight of gold to determine custodian fee tiers | 4,500,000 |  |
Marketing Agent [Member] |  |  |
Related party fees payable at annual rate | 0.15% |  |
Sponsor and Marketing Agent [Member] |  |  |
Trust expense ratio | 0.40% |  |
Assets under management required for Trust accrual | 1,200,000,000 |  |
Accounting rate of ordinary expenses after taking affect of current expenses | 0.40% |  |
Sponsor and Marketing Agent combined fees at a rate | 0.30% |  |
Minimum ANAV to unforeseen expenses | 0.70% |  |
Ordinary expenses accrual rate if gross assets drop discussion | If at the end of any month, the estimated ordinary expenses of the Trust exceed an amount equal to 0.40% per year of the daily ANAV of the Trust for such month, the Sponsor and the Marketing Agent will waive the amount of such excess from the fees payable to them from the assets of the Trust for such month in equal shares up to the amount of their fees |  |
Unforeseen expenses of the Trust discussion | If the Trust incurs unforeseen expenses that cause the total ordinary expenses of the Trust to exceed 0.70% per year of the daily ANAV of the Trust, the ordinary expenses will accrue at a rate greater than 0.40% per year of the daily ANAV of the Trust, even after the Sponsor and the Marketing Agent have completely waived their combined fees |  |
Sponsor and Marketing Agent fees reduction | $ 0 | $ 0 | $ 6,865

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- Definition Accounting rate of ordinary expenses after taking affect of current expenses. + References No definition available. + Details
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- Definition Aggregate weight of gold used to determine appropriate custodian fee tier to use in calculating custodian fee. + References No definition available. + Details
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- Definition Combined sponsor's and marketing agent's fees which can be waived to maintain the total expenses charged to the Trust at the expense ratio of the Trust. + References No definition available. + Details
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- Definition Discussion that relates to the approximate assets under management below which the ordinary expenses will accrue at a rate greater than the expense ratio. + References No definition available. + Details
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- Definition Discussion that relates to the approximate assets under management below which the ordinary expenses will accrue at a rate greater than the expense ratio. + References No definition available. + Details
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- Definition Minimum ANAV to unforeseen expenses. + References No definition available. + Details
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- Definition Discussion that relates to the approximate assets under management below which the ordinary expenses will accrue at a rate greater than the expense ratio. + References No definition available. + Details
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- Definition Discussion that relates to the rate at which unforeseen expenses might accrue which would result in the expense ratio charged to the Trust being exceeded. + References No definition available. + Details
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- Definition The reduction in the Sponsor's and marketing agent's fees made to ensure that the total expenses charged to the Trust do not exceed the expense ratio of the Trust. + References No definition available. + Details
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- Definition The maximum annual fee payable to the Trustee. + References No definition available. + Details
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