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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details Textual) - Jun. 30, 2015 - USD ($)	Total
Number of Units Per Baskets	50,000
Transaction Fee	$ 350

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- Definition

Number of Units Per Baskets.

+ References

No definition available.

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Namespace Prefix:	bno_
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- Definition

A description of what the Transaction fee during the period.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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