Condensed Schedule of Investments (Parenthetical)	3 Months Ended
Mar. 31, 2016 USD ($)
Collateral Amount On Open Futures Contracts	$ 21,816,415
US Treasury Securities \| Cash Equivalents
Interest rate	0.46%
US Treasury Securities \| Cash Equivalents \| U.S. Treasury Bills 0.07%, 4/07/2016
Interest rate	0.07%
Expiration date	4/07/2016
US Treasury Securities \| Cash Equivalents \| U.S.Treasury Bills 0.07%, 4/14/2016
Interest rate	0.07%
Expiration date	4/14/2016
US Treasury Securities \| Cash Equivalents \| U.S.Treasury Bills 0.11%, 4/21/2016
Interest rate	0.11%
Expiration date	4/21/2016
US Treasury Securities \| Cash Equivalents \| U.S.Treasury Bills 0.21%, 4/28/2016
Interest rate	0.21%
Expiration date	4/28/2016
US Treasury Securities \| Cash Equivalents \| U.S.Treasury Bills 0.26%, 5/05/2016
Interest rate	0.26%
Expiration date	5/05/2016
US Treasury Securities \| Cash Equivalents \| U.S.Treasury Bills 0.33%, 5/12/2016
Interest rate	0.33%
Expiration date	5/12/2016
US Treasury Securities \| Cash Equivalents \| U.S.Treasury Bills 0.31%, 5/19/2016
Interest rate	0.31%
Expiration date	5/19/2016
US Treasury Securities \| Cash Equivalents \| U.S.Treasury Bills 0.35%, 5/26/2016
Interest rate	0.35%
Expiration date	5/26/2016
US Treasury Securities \| Cash Equivalents \| U.S.Treasury Bills 0.43%, 6/02/2016
Interest rate	0.43%
Expiration date	6/02/2016
US Treasury Securities \| Cash Equivalents \| U.S.Treasury Bills 0.52%, 6/09/2016
Interest rate	0.52%
Expiration date	6/09/2016
US Treasury Securities \| Cash Equivalents \| U.S.Treasury Bills 0.48%, 6/16/2016
Interest rate	0.48%
Expiration date	6/16/2016
US Treasury Securities \| Cash Equivalents \| U.S.Treasury Bills 0.46%, 6/23/2016
Interest rate	0.46%
Expiration date	6/23/2016
US Treasury Securities \| Cash Equivalents \| U.S.Treasury Bills 0.47%, 6/30/2016
Interest rate	0.47%
Expiration date	6/30/2016
US Treasury Securities \| Cash Equivalents \| U.S.Treasury Bills 0.32%, 7/07/2016
Interest rate	0.32%
Expiration date	7/07/2016
US Treasury Securities \| Cash Equivalents \| U.S.Treasury Bills 0.38%, 7/21/2016
Interest rate	0.38%
Expiration date	7/21/2016
US Treasury Securities \| Cash Equivalents \| U.S.Treasury Bills 0.39%, 7/28/2016
Interest rate	0.39%
Expiration date	7/28/2016
US Treasury Securities \| Cash Equivalents \| U.S.Treasury Bills 0.42%, 8/04/2016
Interest rate	0.42%
Expiration date	8/04/2016
US Treasury Securities \| Cash Equivalents \| U.S.Treasury Bills 0.41%, 8/11/2016
Interest rate	0.41%
Expiration date	8/11/2016
US Treasury Securities \| Cash Equivalents \| U.S.Treasury Bills 0.43%, 8/18/2016
Interest rate	0.43%
Expiration date	8/18/2016
US Treasury Securities \| Cash Equivalents \| U.S.Treasury Bills 0.45%, 8/25/2016
Interest rate	0.45%
Expiration date	8/25/2016
US Treasury Securities \| Cash Equivalents \| U.S.Treasury Bills 0.48%, 9/01/2016
Interest rate	0.48%
Expiration date	9/01/2016
US Treasury Securities \| Cash Equivalents \| U.S.Treasury Bills 0.46%, 9/08/2016
Interest rate	0.46%
Expiration date	9/08/2016
US Treasury Securities \| Cash Equivalents \| U.S.Treasury Bills 0.45%, 9/15/2016
Interest rate	0.45%
Expiration date	9/15/2016
US Treasury Securities \| Cash Equivalents \| U.S.Treasury Bills 0.44%, 9/22/2016
Interest rate	0.44%
Expiration date	9/22/2016
US Treasury Securities \| Cash Equivalents \| U.S.Treasury Bills 0.38%, 9/29/2016
Interest rate	0.38%
Expiration date	9/29/2016
United States \| NYMEX WTI Crude Oil Futures CL February 2017 contracts, expiring January 2017 \| Open Futures Contracts, Long
Expiration date	January 2017
United States \| NYMEX WTI Crude Oil Futures CL March 2017 contracts, expiring February 2017 \| Open Futures Contracts, Long
Expiration date	February 2017
United States \| NYMEX WTI Crude Oil Futures CL April 2017 contracts, expiring March 2017 \| Open Futures Contracts, Long
Expiration date	March 2017
United States \| NYMEX WTI Crude Oil Futures CL May 2016 contracts, expiring April 2016 \| Open Futures Contracts, Long
Expiration date	April 2016
United States \| NYMEX WTI Crude Oil Futures CL June 2016 contracts, expiring May 2016 \| Open Futures Contracts, Long
Expiration date	May 2016
United States \| NYMEX WTI Crude Oil Futures CL July 2016 contracts, expiring June 2016 \| Open Futures Contracts, Long
Expiration date	June 2016
United States \| NYMEX WTI Crude Oil Futures CL August 2016 contracts, expiring July 2016 \| Open Futures Contracts, Long
Expiration date	July 2016
United States \| NYMEX WTI Crude Oil Futures CL September 2016 contracts, expiring August 2016 \| Open Futures Contracts, Long
Expiration date	August 2016
United States \| NYMEX WTI Crude Oil Futures CL October 2016 contracts, expiring September 2016 \| Open Futures Contracts, Long
Expiration date	September 2016
United States \| NYMEX WTI Crude Oil Futures CL November 2016 contracts, expiring October 2016 \| Open Futures Contracts, Long
Expiration date	October 2016
United States \| NYMEX WTI Crude Oil Futures CL December 2016 contracts, expiring November 2016 \| Open Futures Contracts, Long
Expiration date	November 2016
United States \| NYMEX WTI Crude Oil Futures CL January 2017 contracts, expiring December 2016 \| Open Futures Contracts, Long
Expiration date	December 2016