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Condensed Schedule of Investments	Jun. 30, 2017 USD ($)
Unrealized Gain (Loss) on Open Commodity Contracts	$ (6,254,900)
Open Futures Contracts - Long [Member] | United States [Member] | NYMEX WTI Crude Oil Futures CL August 2017 contracts, expiring July 2017*
Number of Contracts	68,833	[1]
Unrealized Gain (Loss) on Open Commodity Contracts	$ (6,254,900)	[1]
% of Partners' Capital	(0.20%)	[1]
Cash Equivalents [Member]
Market Value	$ 2,505,052,318
% of Partners' Capital	79.05%
Cash Equivalents [Member] | United States [Member] | U.S. Treasury Bills, 0.62%, 7/06/2017 [Member]
Principal Amount	$ 75,000,000
Market Value	$ 74,993,594
% of Partners' Capital	2.37%
Cash Equivalents [Member] | United States [Member] | U.S. Treasury Bills, 0.59%, 7/13/2017 [Member]
Principal Amount	$ 75,000,000
Market Value	$ 74,985,375
% of Partners' Capital	2.37%
Cash Equivalents [Member] | United States [Member] | U.S. Treasury Bills, 0.61%, 7/20/2017 [Member]
Principal Amount	$ 75,000,000
Market Value	$ 74,976,052
% of Partners' Capital	2.37%
Cash Equivalents [Member] | United States [Member] | U.S. Treasury Bills, 0.60%, 7/27/2017 [Member]
Principal Amount	$ 75,000,000
Market Value	$ 74,967,771
% of Partners' Capital	2.37%
Cash Equivalents [Member] | United States [Member] | U.S. Treasury Bills, 0.63%, 8/03/2017 [Member]
Principal Amount	$ 75,000,000
Market Value	$ 74,957,031
% of Partners' Capital	2.37%
Cash Equivalents [Member] | United States [Member] | U.S. Treasury Bills, 0.61%, 8/10/2017 [Member]
Principal Amount	$ 75,000,000
Market Value	$ 74,949,167
% of Partners' Capital	2.36%
Cash Equivalents [Member] | United States [Member] | U.S. Treasury Bills, 0.65%, 8/17/2017 [Member]
Principal Amount	$ 75,000,000
Market Value	$ 74,936,354
% of Partners' Capital	2.36%
Cash Equivalents [Member] | United States [Member] | U.S. Treasury Bills, 0.67%, 8/24/2017 [Member]
Principal Amount	$ 75,000,000
Market Value	$ 74,924,625
% of Partners' Capital	2.36%
Cash Equivalents [Member] | United States [Member] | U.S. Treasury Bills, 0.76%, 8/31/2017 [Member]
Principal Amount	$ 75,000,000
Market Value	$ 74,904,052
% of Partners' Capital	2.36%
Cash Equivalents [Member] | United States [Member] | U.S. Treasury Bills, 0.84%, 9/07/2017 [Member]
Principal Amount	$ 75,000,000
Market Value	$ 74,881,000
% of Partners' Capital	2.36%
Cash Equivalents [Member] | United States [Member] | U.S. Treasury Bills, 0.87%, 9/14/2017 [Member]
Principal Amount	$ 100,000,000
Market Value	$ 99,819,583
% of Partners' Capital	3.15%
Cash Equivalents [Member] | United States [Member] | U.S. Treasury Bills, 0.87%, 9/21/2017 [Member]
Principal Amount	$ 75,000,000
Market Value	$ 74,851,375
% of Partners' Capital	2.36%
Cash Equivalents [Member] | United States [Member] | U.S. Treasury Bills, 0.89%, 9/28/2017 [Member]
Principal Amount	$ 75,000,000
Market Value	$ 74,834,979
% of Partners' Capital	2.36%
Cash Equivalents [Member] | United States [Member] | U.S. Treasury Bills, 0.90%, 10/05/2017 [Member]
Principal Amount	$ 75,000,000
Market Value	$ 74,821,000
% of Partners' Capital	2.36%
Cash Equivalents [Member] | United States [Member] | U.S. Treasury Bills, 0.92%, 10/12/2017 [Member]
Principal Amount	$ 60,000,000
Market Value	$ 59,842,925
% of Partners' Capital	1.89%
Cash Equivalents [Member] | United States [Member] | U.S. Treasury Bills, 0.91%, 10/19/2017 [Member]
Principal Amount	$ 75,000,000
Market Value	$ 74,792,604
% of Partners' Capital	2.36%
Cash Equivalents [Member] | United States [Member] | U.S. Treasury Bills, 0.95%, 10/26/2017 [Member]
Principal Amount	$ 90,000,000
Market Value	$ 89,722,125
% of Partners' Capital	2.83%
Cash Equivalents [Member] | United States [Member] | U.S. Treasury Bills, 0.97%, 11/02/2017 [Member]
Principal Amount	$ 75,000,000
Market Value	$ 74,750,709
% of Partners' Capital	2.36%
Cash Equivalents [Member] | United States [Member] | U.S. Treasury Bills, 1.01%, 11/09/2017 [Member]
Principal Amount	$ 80,000,000
Market Value	$ 79,707,434
% of Partners' Capital	2.52%
Cash Equivalents [Member] | United States [Member] | U.S. Treasury Bills, 0.98%, 11/16/2017 [Member]
Principal Amount	$ 75,000,000
Market Value	$ 74,718,250
% of Partners' Capital	2.36%
Cash Equivalents [Member] | United States [Member] | U.S. Treasury Bills, 1.05%, 11/24/2017 [Member]
Principal Amount	$ 80,000,000
Market Value	$ 79,660,956
% of Partners' Capital	2.51%
Cash Equivalents [Member] | United States [Member] | U.S. Treasury Bills, 1.05%, 11/30/2017 [Member]
Principal Amount	$ 75,000,000
Market Value	$ 74,669,083
% of Partners' Capital	2.36%
Cash Equivalents [Member] | United States [Member] | U.S. Treasury Bills, 1.08%, 12/07/2017 [Member]
Principal Amount	$ 75,000,000
Market Value	$ 74,645,563
% of Partners' Capital	2.36%
Cash Equivalents [Member] | United States [Member] | U.S. Treasury Bills, 1.09%, 12/14/2017 [Member]
Principal Amount	$ 80,000,000
Market Value	$ 79,601,600
% of Partners' Capital	2.51%
Cash Equivalents [Member] | United States [Member] | U.S. Treasury Bills, 1.11%, 12/21/2017 [Member]
Principal Amount	$ 80,000,000
Market Value	$ 79,577,111
% of Partners' Capital	2.51%
Cash Equivalents [Member] | United States [Member] | U.S. Treasury Bills, 1.10%, 12/28/2017 [Member]
Principal Amount	$ 80,000,000
Market Value	$ 79,562,000
% of Partners' Capital	2.51%
Cash Equivalents [Member] | United States [Member] | US Treasury Securities [Member]
Market Value	$ 1,995,052,318
% of Partners' Capital	62.96%
Cash Equivalents [Member] | United States [Member] | Money Market Funds [Member]
Market Value	$ 510,000,000
% of Partners' Capital	16.09%
Cash Equivalents [Member] | United States [Member] | Money Market Funds [Member] | Fidelity Investments Money Market Funds - Government Portfolio [Member]
Principal Amount	$ 200,000,000
Market Value	$ 200,000,000
% of Partners' Capital	6.31%
Cash Equivalents [Member] | United States [Member] | Money Market Funds [Member] | Goldman Sachs Financial Square Funds - Government Fund - Class FS [Member]
Principal Amount	$ 160,000,000
Market Value	$ 160,000,000
% of Partners' Capital	5.05%
Cash Equivalents [Member] | United States [Member] | Money Market Funds [Member] | Morgan Stanley Institutional Liquidity Funds - Government Portfolio [Member]
Principal Amount	$ 150,000,000
Market Value	$ 150,000,000
% of Partners' Capital	4.73%
[1] Collateral amounted to $453,625,077 on open futures contracts.

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