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Condensed Schedule of Investments	Mar. 31, 2021 USD ($) contract
Fair Value/ Unrealized Gain (Loss) on Open Commodity Contracts	$ 45,223,430
United States - Money Market Funds
Market Value	$ 151,346,000
% of Partners' Capital	76.28%
United States - Money Market Funds | Goldman Sachs Financial Square Government Fund - Institutional Shares [Member]
Shares/Principal Amount	$ 200,000
Market Value	$ 200,000
% of Partners' Capital	0.10%
United States - Money Market Funds | RBC U.S. Government Money Market Fund - Institutional Shares [Member]
Shares/Principal Amount	$ 9,146,000
Market Value	$ 9,146,000
% of Partners' Capital	4.61%
United States - Money Market Funds | Morgan Stanley Institutional Liquidity Funds - Government Portfolio [Member]
Shares/Principal Amount	$ 142,000,000
Market Value	$ 142,000,000
% of Partners' Capital	71.57%
Open Commodity Futures Contracts - Long | United States Contracts
Notional Amount	$ 153,207,530
Number of Contracts | contract	3,453
Fair Value/ Unrealized Gain (Loss) on Open Commodity Contracts	$ 45,223,430
% of Partners' Capital	22.79%
Open Commodity Futures Contracts - Long | United States Contracts | NYMEX WTI Crude Oil Futures CL May 2021 contracts, expiring April 2021
Notional Amount	$ 9,862,070
Number of Contracts | contract	287
Fair Value/ Unrealized Gain (Loss) on Open Commodity Contracts	$ 7,116,850
% of Partners' Capital	3.59%
Open Commodity Futures Contracts - Long | United States Contracts | NYMEX WTI Crude Oil Futures CL June 2021 contracts, expiring May 2021
Notional Amount	$ 10,532,690
Number of Contracts | contract	288
Fair Value/ Unrealized Gain (Loss) on Open Commodity Contracts	$ 6,511,150
% of Partners' Capital	3.28%
Open Commodity Futures Contracts - Long | United States Contracts | NYMEX WTI Crude Oil Futures CL July 2021 contracts, expiring June 2021
Notional Amount	$ 11,821,950
Number of Contracts | contract	287
Fair Value/ Unrealized Gain (Loss) on Open Commodity Contracts	$ 5,119,660
% of Partners' Capital	2.58%
Open Commodity Futures Contracts - Long | United States Contracts | NYMEX WTI Crude Oil Futures CL August 2021 contracts, expiring July 2021
Notional Amount	$ 12,294,860
Number of Contracts | contract	288
Fair Value/ Unrealized Gain (Loss) on Open Commodity Contracts	$ 4,607,860
% of Partners' Capital	2.32%
Open Commodity Futures Contracts - Long | United States Contracts | NYMEX WTI Crude Oil Futures CL September 2021 contracts, expiring August 2021
Notional Amount	$ 12,916,400
Number of Contracts | contract	288
Fair Value/ Unrealized Gain (Loss) on Open Commodity Contracts	$ 3,856,720
% of Partners' Capital	1.94%
Open Commodity Futures Contracts - Long | United States Contracts | NYMEX WTI Crude Oil Futures CL October 2021 contracts, expiring September 2021
Notional Amount	$ 12,119,490
Number of Contracts | contract	288
Fair Value/ Unrealized Gain (Loss) on Open Commodity Contracts	$ 4,515,390
% of Partners' Capital	2.28%
Open Commodity Futures Contracts - Long | United States Contracts | NYMEX WTI Crude Oil Futures CL November 2020 contracts, expiring October 2020
Notional Amount	$ 12,590,960
Number of Contracts | contract	288
Fair Value/ Unrealized Gain (Loss) on Open Commodity Contracts	$ 3,908,560
% of Partners' Capital	1.97%
Open Commodity Futures Contracts - Long | United States Contracts | NYMEX WTI Crude Oil Futures CL December 2020 contracts, expiring November 2020
Notional Amount	$ 11,947,100
Number of Contracts | contract	288
Fair Value/ Unrealized Gain (Loss) on Open Commodity Contracts	$ 4,425,700
% of Partners' Capital	2.23%
Open Commodity Futures Contracts - Long | United States Contracts | NYMEX WTI Crude Oil Futures January 2022 contracts, expiring December 2021
Notional Amount	$ 13,086,720
Number of Contracts | contract	288
Fair Value/ Unrealized Gain (Loss) on Open Commodity Contracts	$ 3,162,240
% of Partners' Capital	1.59%
Open Commodity Futures Contracts - Long | United States Contracts | NYMEX WTI Crude Oil Futures February 2022 contracts, expiring January 2022
Notional Amount	$ 13,918,770
Number of Contracts | contract	288
Fair Value/ Unrealized Gain (Loss) on Open Commodity Contracts	$ 2,214,990
% of Partners' Capital	1.12%
Open Commodity Futures Contracts - Long | United States Contracts | NYMEX WTI Crude Oil Futures March 2022 contracts, expiring February 2022
Notional Amount	$ 15,233,960
Number of Contracts | contract	287
Fair Value/ Unrealized Gain (Loss) on Open Commodity Contracts	$ 737,590
% of Partners' Capital	0.37%
Open Commodity Futures Contracts - Long | United States Contracts | NYMEX WTI Crude Oil Futures April 2022 contracts, expiring March 2022
Notional Amount	$ 16,882,560
Number of Contracts | contract	288
Fair Value/ Unrealized Gain (Loss) on Open Commodity Contracts	$ (953,280)
% of Partners' Capital	(0.48%)
Cash Equivalents | United States Treasury Obligations | U.S. Treasury Bills, 0.04%, 5/06/2021
Shares/Principal Amount	$ 30,000,000
Market Value	$ 29,998,833
% of Partners' Capital	15.12%
Cash Equivalents | United States - Money Market Funds
Market Value	$ 181,344,833
% of Partners' Capital	91.40%

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