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Statements of Financial Condition (Unaudited) (Parenthetical) - USD ($) | Sep. 30, 2024 | Dec. 31, 2023
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Investments in Securities, cost | $ 1,411,024,278 | $ 1,691,344,447
US Treasury Bill Securities [Member] |  |
Investments in Securities, cost | 693,877,370 | 783,578,544
Affiliated Investments [Member] |  |
Affiliated Investments, at Cost | $ 717,146,908 | $ 907,765,903

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