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Condensed Schedule of Investments	Jun. 30, 2018 USD ($)
Value/ Unrealized Gain (Loss) on Open Commodity Contracts	$ 203,630,680
Open Futures Contracts - Long [Member] | United States Contracts [Member] | NYMEX WTI Crude Oil Futures CL August 2018 contracts, expiring July 2018 [Member]
Notional Amount	$ 1,607,927,970	[1]
Number of Contracts	24,431	[1]
Value/ Unrealized Gain (Loss) on Open Commodity Contracts	$ 203,630,680	[1]
% of Partners' Capital	11.24%	[1]
Cash Equivalents [Member]
Market Value	$ 1,831,192,379
% of Partners' Capital	101.09%
Cash Equivalents [Member] | United States Treasury Obligations [Member]
Market Value	$ 1,562,192,379
% of Partners' Capital	86.24%
Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S. Treasury Bills, 1.56%, 7/05/2018 [Member]
Principal Amount	$ 50,000,000
Market Value	$ 49,991,389
% of Partners' Capital	2.76%
Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S. Treasury Bills, 1.56%, 7/12/2018[Member]
Principal Amount	$ 60,000,000
Market Value	$ 59,971,583
% of Partners' Capital	3.31%
Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S. Treasury Bills, 1.60%, 7/19/2018[Member]
Principal Amount	$ 50,000,000
Market Value	$ 49,960,250
% of Partners' Capital	2.76%
Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S. Treasury Bills, 1.61%, 7/26/2018[Member]
Principal Amount	$ 75,000,000
Market Value	$ 74,916,927
% of Partners' Capital	4.14%
Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S. Treasury Bills, 1.63%, 8/02/2018[Member]
Principal Amount	$ 50,000,000
Market Value	$ 49,928,000
% of Partners' Capital	2.76%
Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S. Treasury Bills, 1.71%, 8/09/2018[Member]
Principal Amount	$ 50,000,000
Market Value	$ 49,908,187
% of Partners' Capital	2.76%
Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S. Treasury Bills, 1.77%, 8/16/2018[Member]
Principal Amount	$ 75,000,000
Market Value	$ 74,831,813
% of Partners' Capital	4.13%
Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S. Treasury Bills, 1.82%, 8/23/2018[Member]
Principal Amount	$ 75,000,000
Market Value	$ 74,801,250
% of Partners' Capital	4.13%
Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S. Treasury Bills, 1.82%, 8/30/2018[Member]
Principal Amount	$ 75,000,000
Market Value	$ 74,774,375
% of Partners' Capital	4.13%
Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S. Treasury Bills, 1.85%, 9/06/2018[Member]
Principal Amount	$ 50,000,000
Market Value	$ 49,829,708
% of Partners' Capital	2.75%
Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S. Treasury Bills, 1.90%, 9/13/2018[Member]
Principal Amount	$ 75,000,000
Market Value	$ 74,709,396
% of Partners' Capital	4.12%
Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S. Treasury Bills, 1.92%, 9/20/2018[Member]
Principal Amount	$ 50,000,000
Market Value	$ 49,785,688
% of Partners' Capital	2.75%
Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S. Treasury Bills, 1.90%, 9/27/2018[Member]
Principal Amount	$ 50,000,000
Market Value	$ 49,770,528
% of Partners' Capital	2.75%
Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S. Treasury Bills, 1.87%,10/04/2018 [Member]
Principal Amount	$ 75,000,000
Market Value	$ 74,632,864
% of Partners' Capital	4.12%
Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S. Treasury Bills, 1.90%, 10/11/2018 [Member]
Principal Amount	$ 60,000,000
Market Value	$ 59,680,400
% of Partners' Capital	3.29%
Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S. Treasury Bills, 1.97%, 10/18/2018 [Member]
Principal Amount	$ 60,000,000
Market Value	$ 59,645,750
% of Partners' Capital	3.29%
Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S. Treasury Bills, 2.00%, 10/25/2018 [Member]
Principal Amount	$ 50,000,000
Market Value	$ 49,681,000
% of Partners' Capital	2.74%
Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S. Treasury Bills, 2.00%, 11/01/2018 [Member]
Principal Amount	$ 60,000,000
Market Value	$ 59,594,100
% of Partners' Capital	3.29%
Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S. Treasury Bills, 2.03%, 11/08/2018 [Member]
Principal Amount	$ 50,000,000
Market Value	$ 49,637,986
% of Partners' Capital	2.74%
Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S. Treasury Bills, 2.05%, 11/15/2018 [Member]
Principal Amount	$ 50,000,000
Market Value	$ 49,613,736
% of Partners' Capital	2.74%
Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S. Treasury Bills, 2.07%, 11/23/2018 [Member]
Principal Amount	$ 70,000,000
Market Value	$ 69,422,014
% of Partners' Capital	3.83%
Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S. Treasury Bills, 2.05%, 11/29/2018 [Member]
Principal Amount	$ 70,000,000
Market Value	$ 69,405,438
% of Partners' Capital	3.83%
Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S. Treasury Bills, 2.09%, 12/06/2018 [Member]
Principal Amount	$ 70,000,000
Market Value	$ 69,364,050
% of Partners' Capital	3.83%
Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S. Treasury Bills, 2.06%, 12/13/2018 [Member]
Principal Amount	$ 60,000,000
Market Value	$ 59,439,000
% of Partners' Capital	3.28%
Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S. Treasury Bills, 2.09%, 12/20/2018 [Member]
Principal Amount	$ 60,000,000
Market Value	$ 59,406,600
% of Partners' Capital	3.28%
Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S. Treasury Bills, 2.07%, 12/27/2018 [Member]
Principal Amount	$ 50,000,000
Market Value	$ 49,490,347
% of Partners' Capital	2.73%
Cash Equivalents [Member] | United States - Money Market Funds [Member]
Market Value	$ 269,000,000
% of Partners' Capital	14.85%
Cash Equivalents [Member] | United States - Money Market Funds [Member] | Fidelity Investments Money Market Funds - Government Portfolio [Member]
Principal Amount	$ 69,000,000
Market Value	$ 69,000,000
% of Partners' Capital	3.81%
Cash Equivalents [Member] | United States - Money Market Funds [Member] | Goldman Sachs Financial Square Funds - Government Fund - Class FS [Member]
Principal Amount	$ 100,000,000
Market Value	$ 100,000,000
% of Partners' Capital	5.52%
Cash Equivalents [Member] | United States - Money Market Funds [Member] | Morgan Stanley Institutional Liquidity Funds - Government Portfolio [Member]
Principal Amount	$ 100,000,000
Market Value	$ 100,000,000
% of Partners' Capital	5.52%
[1] Collateral amounted to $124,439,236 on open futures contracts.

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