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Condensed Schedule of Investments	Mar. 31, 2016 USD ($) Number
Unrealized Gain (Loss) on Open Commodity Contracts	$ (96,981,140)
Open Futures Contracts - Long [Member] | United States [Member] | NYMEX WTI Crude Oil Futures CL May 2016 contracts, expiring April 2016 [Member]
Number of Contracts | Number	91,625	[1]
Unrealized Gain (Loss) on Open Commodity Contracts	$ (96,981,140)	[1]
% of Partners' Capital	(2.76%)	[1]
Cash Equivalent [Member]
Market Value	$ 2,617,817,593
% of Partners' Capital	74.52%
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.07%, 4/07/2016 [Member]
Principal Amount	$ 75,000,000
Market Value	$ 74,999,125
% of Partners' Capital	2.14%
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.07%, 4/14/2016 [Member]
Principal Amount	$ 75,000,000
Market Value	$ 74,998,240
% of Partners' Capital	2.14%
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.11%, 4/21/2016 [Member]
Principal Amount	$ 75,000,000
Market Value	$ 74,995,417
% of Partners' Capital	2.14%
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.21%, 4/28/2016 [Member]
Principal Amount	$ 75,000,000
Market Value	$ 74,988,187
% of Partners' Capital	2.14%
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.26%, 5/05/2016 [Member]
Principal Amount	$ 50,000,000
Market Value	$ 49,987,722
% of Partners' Capital	1.42%
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.33%, 5/12/2016 [Member]
Principal Amount	$ 70,000,000
Market Value	$ 69,973,692
% of Partners' Capital	1.99%
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.31%, 5/19/2016 [Member]
Principal Amount	$ 75,000,000
Market Value	$ 74,969,000
% of Partners' Capital	2.14%
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.35%, 5/26/2016 [Member]
Principal Amount	$ 180,000,000
Market Value	$ 179,904,514
% of Partners' Capital	5.13%
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.43%, 6/02/2016 [Member]
Principal Amount	$ 75,000,000
Market Value	$ 74,945,104
% of Partners' Capital	2.13%
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.52%, 6/09/2016 [Member]
Principal Amount	$ 50,000,000
Market Value	$ 49,950,167
% of Partners' Capital	1.42%
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.48%, 6/16/2016 [Member]
Principal Amount	$ 50,000,000
Market Value	$ 49,949,333
% of Partners' Capital	1.42%
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.46%, 6/23/2016 [Member]
Principal Amount	$ 70,000,000
Market Value	$ 69,926,568
% of Partners' Capital	1.99%
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.45%, 6/30/2016 [Member]
Principal Amount	$ 150,000,000
Market Value	$ 149,829,375
% of Partners' Capital	4.27%
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.32%, 7/07/2016 [Member]
Principal Amount	$ 50,000,000
Market Value	$ 49,956,889
% of Partners' Capital	1.42%
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.32%, 7/14/2016 [Member]
Principal Amount	$ 50,000,000
Market Value	$ 49,953,778
% of Partners' Capital	1.42%
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.38%, 7/21/2016 [Member]
Principal Amount	$ 50,000,000
Market Value	$ 49,941,417
% of Partners' Capital	1.42%
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.43%, 7/28/2016 [Member]
Principal Amount	$ 100,000,000
Market Value	$ 99,859,055
% of Partners' Capital	2.84%
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.42%, 8/04/2016 [Member]
Principal Amount	$ 50,000,000
Market Value	$ 49,927,951
% of Partners' Capital	1.42%
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.41%, 8/11/2016 [Member]
Principal Amount	$ 75,000,000
Market Value	$ 74,887,250
% of Partners' Capital	2.13%
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.43%, 8/18/2016 [Member]
Principal Amount	$ 75,000,000
Market Value	$ 74,876,927
% of Partners' Capital	2.13%
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.45%, 8/25/2016 [Member]
Principal Amount	$ 75,000,000
Market Value	$ 74,864,646
% of Partners' Capital	2.13%
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.48%, 9/01/2016 [Member]
Principal Amount	$ 75,000,000
Market Value	$ 74,847,000
% of Partners' Capital	2.13%
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.46%, 9/08/2016 [Member]
Principal Amount	$ 100,000,000
Market Value	$ 99,797,778
% of Partners' Capital	2.84%
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.45%, 9/15/2016 [Member]
Principal Amount	$ 100,000,000
Market Value	$ 99,791,250
% of Partners' Capital	2.84%
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.44%, 9/22/2016 [Member]
Principal Amount	$ 75,000,000
Market Value	$ 74,840,500
% of Partners' Capital	2.13%
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.38%, 9/29/2016 [Member]
Principal Amount	$ 75,000,000
Market Value	$ 74,856,708
% of Partners' Capital	2.13%
Cash Equivalent [Member] | United States [Member] | US Treasury Securities [Member]
Market Value	$ 2,017,817,593
% of Partners' Capital	57.45%
Cash Equivalent [Member] | United States [Member] | Money Market Funds [Member]
Market Value	$ 600,000,000
% of Partners' Capital	17.07%
Cash Equivalent [Member] | United States [Member] | Money Market Funds [Member] | Fidelity Institutional Money Market Funds - Government Portfolio [Member]
Principal Amount	$ 200,000,000
Market Value	$ 200,000,000
% of Partners' Capital	5.69%
Cash Equivalent [Member] | United States [Member] | Money Market Funds [Member] | Goldman Sachs Financial Square Funds - Government Fund - Class FS [Member]
Principal Amount	$ 200,000,000
Market Value	$ 200,000,000
% of Partners' Capital	5.69%
Cash Equivalent [Member] | United States [Member] | Money Market Funds [Member] | Morgan Stanley Institutional Liquidity Funds - Government Portfolio [Member]
Principal Amount	$ 200,000,000
Market Value	$ 200,000,000
% of Partners' Capital	5.69%
[1] Collateral amounted to $463,956,958 on open future contracts.

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