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

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- Definition

Cash collateral received from derivative counter party.

+ References

No definition available.

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- Definition

Fair value of securities received as collateral against derivative assets.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 20
-Section 55
-Paragraph 12
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- Definition

Fair value, after effects of master netting arrangements, deduction of assets not subject to a master netting arrangement and elected not to be offset, of financial asset or other 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 an obligation to return collateral.

+ References

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-Publisher FASB
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-Section 50
-Paragraph 3
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Fair value, after the effects of master netting arrangements, of a financial asset or other 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 assets not subject to a master netting arrangement and not elected to be offset.

+ References

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- Definition

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+ References

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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No definition available.

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