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Condensed Schedule of Investments [Parenthetical]	9 Months Ended
	Sep. 30, 2016 USD ($)
Collateral amount on open futures contracts	$ 9,995,363
Cash Equivalents [Member] | United States [Member] | U.S. Treasury Bills,0.34%, 10/06/2016 | Us Treasury Securities [Member]
Interest rate	0.34%
Expiration date	October 06, 2016
Cash Equivalents [Member] | United States [Member] | U.S. Treasury Bills,0.35%, 10/13/2016 | Us Treasury Securities [Member]
Interest rate	0.35%
Expiration date	October 13, 2016
Cash Equivalents [Member] | United States [Member] | U.S. Treasury Bills,0.34%, 10/20/2016 | Us Treasury Securities [Member]
Interest rate	0.34%
Expiration date	October 20, 2016
Cash Equivalents [Member] | United States [Member] | U.S. Treasury Bills,0.39%, 10/27/2016 | Us Treasury Securities [Member]
Interest rate	0.39%
Expiration date	October 27, 2016
Cash Equivalents [Member] | United States [Member] | U.S. Treasury Bills,0.37%, 11/03/2016 | Us Treasury Securities [Member]
Interest rate	0.37%
Expiration date	November 03, 2016
Cash Equivalents [Member] | United States [Member] | U.S. Treasury Bills,0.36%, 11/10/2016 | Us Treasury Securities [Member]
Interest rate	0.36%
Expiration date	November 10, 2016
Cash Equivalents [Member] | United States [Member] | U.S. Treasury Bills,0.39%, 11/17/2016 | Us Treasury Securities [Member]
Interest rate	0.39%
Expiration date	November 17, 2016
Cash Equivalents [Member] | United States [Member] | U.S. Treasury Bills,0.46%, 11/25/2016 | Us Treasury Securities [Member]
Interest rate	0.46%
Expiration date	November 25, 2016
Cash Equivalents [Member] | United States [Member] | U.S. Treasury Bills,0.47%, 12/01/2016 | Us Treasury Securities [Member]
Interest rate	0.47%
Expiration date	December 01, 2016
Cash Equivalents [Member] | United States [Member] | U.S. Treasury Bills,0.41%, 12/08/2016 | Us Treasury Securities [Member]
Interest rate	0.41%
Expiration date	December 08, 2016
Cash Equivalents [Member] | United States [Member] | U.S. Treasury Bills,0.34%, 12/15/2016 | Us Treasury Securities [Member]
Interest rate	0.34%
Expiration date	December 15, 2016
Cash Equivalents [Member] | United States [Member] | U.S. Treasury Bills,0.39%, 12/22/2016 | Us Treasury Securities [Member]
Interest rate	0.39%
Expiration date	December 22, 2016
Cash Equivalents [Member] | United States [Member] | U.S. Treasury Bills,0.34%, 12/29/2016 | Us Treasury Securities [Member]
Interest rate	0.34%
Expiration date	December 29, 2016
Cash Equivalents [Member] | United States [Member] | U.S. Treasury Bills,0.34%, 1/05/2017 | Us Treasury Securities [Member]
Interest rate	0.34%
Expiration date	January 05, 2017
Cash Equivalents [Member] | United States [Member] | U.S. Treasury Bills,0.43%, 1/19/2017 | Us Treasury Securities [Member]
Interest rate	0.43%
Expiration date	January 19, 2017
Cash Equivalents [Member] | United States [Member] | U.S. Treasury Bills,0.40%, 2/02/2017 | Us Treasury Securities [Member]
Interest rate	0.40%
Expiration date	February 02, 2017
Cash Equivalents [Member] | United States [Member] | U.S. Treasury Bills,0.42%, 2/09/2017 | Us Treasury Securities [Member]
Interest rate	0.42%
Expiration date	February 09, 2017
Cash Equivalents [Member] | United States [Member] | U.S. Treasury Bills,0.45%, 2/16/2017 | Us Treasury Securities [Member]
Interest rate	0.45%
Expiration date	February 16, 2017
Cash Equivalents [Member] | United States [Member] | U.S. Treasury Bills,0.45%, 2/23/2017 | Us Treasury Securities [Member]
Interest rate	0.45%
Expiration date	February 23, 2017
Cash Equivalents [Member] | United States [Member] | U.S. Treasury Bills,0.45%, 3/02/2017 | Us Treasury Securities [Member]
Interest rate	0.45%
Expiration date	March 02, 2017
Cash Equivalents [Member] | United States [Member] | U.S. Treasury Bills,0.47%, 3/09/2017 | Us Treasury Securities [Member]
Interest rate	0.47%
Expiration date	March 09, 2017
Cash Equivalents [Member] | United States [Member] | U.S. Treasury Bills,0.50%, 3/16/2017 | Us Treasury Securities [Member]
Interest rate	0.50%
Expiration date	March 16, 2017
Cash Equivalents [Member] | United States [Member] | U.S. Treasury Bills,0.45%, 3/23/2017 | Us Treasury Securities [Member]
Interest rate	0.45%
Expiration date	March 23, 2017
Cash Equivalents [Member] | United States [Member] | U.S. Treasury Bills,0.43%, 3/30/2017 | Us Treasury Securities [Member]
Interest rate	0.43%
Expiration date	March 30, 2017
Open Futures Contracts - Long [Member] | United States [Member] | Ice Brent Crude Oil Futures Co December 2016 Contracts Expiring October 2016 [Member]
Expiration date	October 2016

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- Definition

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+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 946
-SubTopic 320
-Section S99
-Paragraph 6
-Subparagraph (SX 210.12-14.4(b))
-URI http://asc.fasb.org/extlink&oid=50485924&loc=d3e611322-123010

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 946
-SubTopic 320
-Section S99
-Paragraph 5
-Subparagraph (SX 210.12-13.5(d))
-URI http://asc.fasb.org/extlink&oid=50485924&loc=d3e611282-123010

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