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Statements of Cash Flows
 12 Months Ended
Dec. 31, 2022
USD ($)
Dec. 31, 2021
USD ($)
Dec. 31, 2020
USD ($)
Cash Flows from Operating Activities:      
Net income (loss) $ 785,240,277 $ 1,602,274,244 $ (1,905,181,579)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:      
Change in unrealized (gain) loss on open commodity futures contracts 92,251,288 287,006,734 (363,923,391)
Change in unrealized (gain) loss on open swap contracts 4,145 0 0
(Increase) decrease in dividends receivable (3,879,706) (30,032) 2,200
(Increase) decrease in interest receivable (2,773,974) 107,416 (132,758)
(Increase) decrease in prepaid insurance* 3,051 (106,243) 817
(Increase) decrease in prepaid registration fees 0 1,260,041 (1,185,800)
(Increase) decrease in ETF transaction fees receivable 0 2,000 0
Increase (decrease) payable due to custody 1,012,851 0 0
Increase (decrease) in payable due to Broker 1,387,987 (23,667,355) 14,846,706
Increase (decrease) in General Partner management fees payable (89,639) (469,125) 939,671
Increase (decrease) in professional fees payable (1,173,950) 1,712,827 449,177
Increase (decrease) in brokerage commissions payable (93,126) (123,270) 233,897
Increase (decrease) in directors'fees payable (2,124) [1] (7,712) [1] 8,661 [1]
Increase (decrease) in license fees payable (24,770) (40,723) 129,894
Net cash provided by (used in) operating activities 871,862,310 1,867,918,802 (2,253,812,505)
Cash Flows from Financing Activities:      
Addition of partnership shares 3,508,243,142 1,239,249,023 8,030,979,653
Redemption of partnership shares (4,690,627,347) (4,151,987,568) (3,644,174,420)
Net cash provided by (used in) financing activities (1,182,384,205) (2,912,738,545) 4,386,805,233
Net Increase (Decrease) in Cash and Cash Equivalents (310,521,895) (1,044,819,743) 2,132,992,728
Total Cash, Cash Equivalents and Equity in Trading Accounts, beginning of year 2,264,418,396 3,309,238,139 1,176,245,411
Total Cash, Cash Equivalents and Equity in Trading Accounts, end of year 1,953,896,501 2,264,418,396 3,309,238,139
Components of Cash and Cash Equivalents:      
Cash and cash equivalents 856,400,000 1,565,100,289 2,585,466,700
Equity in Trading Accounts:      
Cash and cash equivalents 1,097,496,501 699,318,107 723,771,439
Total Cash, Cash Equivalents and Equity in Trading Accounts $ 1,953,896,501 $ 2,264,418,396 $ 3,309,238,139
[1] Certain prior year amounts have been reclassified for consistency with the current presentation.