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Derivative Contract Information - Fund's OTC Derivative Liabilities (Detail) - Merrill Lynch International [Member] - Over-the-Counter ("OTC") [Member] - USD ($)	Mar. 31, 2018	Sep. 30, 2017
Offsetting Liabilities [Line Items]
Gross Amounts of Liabilities Presented in the Statement of Financial Condition	$ 0	$ 0
Financial Instruments Available for Offset	0	0
Financial Instruments Collateral Pledged	0	0
Cash Collateral Pledged	0	0
Net Amount	0	0
SPDR Long Dollar Gold Trust [Member]
Offsetting Liabilities [Line Items]
Gross Amounts of Liabilities Presented in the Statement of Financial Condition	0	0
Financial Instruments Available for Offset	0	0
Financial Instruments Collateral Pledged	0	0
Cash Collateral Pledged	0	0
Net Amount	$ 0	$ 0

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Fair value, after effects of master netting arrangements, of financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset offset against the right to receive collateral. Includes liabilities not subject to a master netting arrangement and not elected to be offset.

+ References

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Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities not subject to a master netting arrangement and not elected to be offset.

+ References

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- Definition

Fair value of securities pledged as collateral against derivative liabilities.

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+ References

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