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Condensed Schedule of Investments
 3 Months Ended 12 Months Ended
Mar. 31, 2024
USD ($)
contract
Dec. 31, 2023
USD ($)
contract
Notional Amount [1]   $ 223,865,330
Number of Contracts | contract 41,428  
Fair Value/ Unrealized Gain (Loss) on Open Commodity Contracts $ (19,516,706) 40,072,461
Fair Value/Open Commodity Swap Contracts [1]   238,768,541
Unrealized Gain (Loss) on Commodity Swap Contracts [1],[2]   $ 14,903,211
MACQUARIE MQCP362H 12122023 Index | Macquarie Bank Ltd.    
Payment frequency [3]   Monthly
Expiration Date [3]   Jan. 12, 2024
Notional Amount [3]   $ 129,306,126
Number of Contracts [3]   0.25
Fair Value/Open Commodity Swap Contracts [3]   $ 144,210,360
Unrealized Gain (Loss) on Commodity Swap Contracts [2],[3]   $ 14,904,234
MACQUARIE MQCP362H 12122023 Index | Societe Generale    
Payment frequency [3]   Monthly
Expiration Date [3]   Mar. 29, 2024
Notional Amount [3]   $ 94,559,204
Number of Contracts [3]   0.40
Fair Value/Open Commodity Swap Contracts [3]   $ 94,558,181
Unrealized Gain (Loss) on Commodity Swap Contracts [2],[3]   (1,023)
SOC GEN SGIXCNG1 03282024 Index | Societe Generale    
Payment frequency [3],[4] Monthly  
Expiration Date [3],[4] Sep. 27, 2024  
Notional Amount [3],[4] $ 100,000,831  
Number of Contracts [3],[4] 0.40  
Fair Value/Open Commodity Swap Contracts [3],[4] $ 100,000,000  
Unrealized Gain (Loss) on Commodity Swap Contracts [3],[4],[5] (831)  
Open Commodity Futures Contracts - Long | United States | NYMEX Natural Gas Futures NG February 2024 contracts, expiring January 2024    
Notional Amount [6]   $ 695,222,259
Number of Contracts | contract [6]   29,248
Fair Value/ Unrealized Gain (Loss) on Open Commodity Contracts [6]   $ 40,072,461
% of Partners' Capital [6]   4.11%
Open Commodity Futures Contracts - Long | United States | NYMEX Natural Gas Futures NG May 2024 contracts, expiring April 2024    
Notional Amount [7] $ 749,892,346  
Number of Contracts | contract [7] 41,428  
Fair Value/ Unrealized Gain (Loss) on Open Commodity Contracts [7] $ (19,516,706)  
% of Partners' Capital [7] (2.35%)  
Cash Equivalents | United States | Money Market Funds    
Market Value $ 70,950,000 $ 70,950,000
% of Partners' Capital 8.54% 7.29%
Cash Equivalents | United States | Money Market Funds | Morgan Stanley Institutional Liquidity Funds - Government Portfolio - Institutional Shares, 5.27%    
Shares/Principal Amount [8]   $ 70,950,000
Market Value [8]   $ 70,950,000
% of Partners' Capital [8]   7.29%
Cash Equivalents | United States | Money Market Funds | Morgan Stanley Institutional Liquidity Funds - Government Portfolio - Institutional Shares    
Shares/Principal Amount [9] $ 70,950,000  
Market Value [9] $ 70,950,000  
% of Partners' Capital [9] 8.54%  
[1] Collateral amounted to $40,660,000 on open OTC commodity swap contracts.
[2] Reflects the value at reset date of December 29, 2023.
[3] Custom index comprised of a basket of underlying instruments
[4] Collateral amounted to $36,210,000 on open OTC commodity swap contracts
[5] Reflects the value at reset date of March 28, 2024
[6] Collateral amounted to $210,148,873 on open commodity futures contracts.
[7] Collateral amounted to $239,751,800 on open commodity futures contracts
[8] Reflects the 7-day yield at December 31, 2023.
[9] Reflects the 7-day yield at March 31, 2024