Condensed Schedule of Investments (Parenthetical)	Sep. 30, 2019 USD ($)
Collateral Amount On Open Futures Contracts	$ 169,419,628
United States \| U.S. Treasury Bills, 2.40%, 10/03/2019 \| Cash Equivalents
Interest rate	2.40%
United States \| U.S. Treasury Bills, 2.41%, 10/10/2019 \| Cash Equivalents
Interest rate	2.41%
United States \| U.S. Treasury Bills, 2.42%, 10/17/2019 \| Cash Equivalents
Interest rate	2.42%
United States \| U.S. Treasury Bills, 2.40%, 10/24/2019 \| Cash Equivalents
Interest rate	2.40%
United States \| U.S. Treasury Bills, 2.37%, 10/31/2019 \| Cash Equivalents
Interest rate	2.37%
United States \| U.S. Treasury Bills, 2.40%, 11/07/2019 \| Cash Equivalents
Interest rate	2.40%
United States \| U.S. Treasury Bills, 2.38%, 11/14/2019 \| Cash Equivalents
Interest rate	2.38%
United States \| U.S. Treasury Bills, 2.37%, 11/21/2019 \| Cash Equivalents
Interest rate	2.37%
United States \| U.S. Treasury Bills, 2.33%, 11/29/2019 \| Cash Equivalents
Interest rate	2.33%
United States \| U.S. Treasury Bills, 2.20%, 12/05/2019 \| Cash Equivalents
Interest rate	2.20%
United States \| U.S. Treasury Bills, 2.16%, 12/12/2019 \| Cash Equivalents
Interest rate	2.16%
United States \| U.S. Treasury Bills, 2.15%, 12/19/2019 \| Cash Equivalents
Interest rate	2.15%
United States \| U.S. Treasury Bills, 2.07%, 12/26/2019 \| Cash Equivalents
Interest rate	2.07%
United States \| U.S. Treasury Bills, 2.05%, 1/02/2020 \| Cash Equivalents
Interest rate	2.05%
United States \| U.S. Treasury Bills, 2.03%, 1/09/2020 \| Cash Equivalents
Interest rate	2.03%
United States \| U.S. Treasury Bills, 2.01%, 1/16/2020 \| Cash Equivalents
Interest rate	2.01%
United States \| U.S. Treasury Bills, 2.04%, 1/23/2020 \| Cash Equivalents
Interest rate	2.04%
United States \| U.S. Treasury Bills, 2.02%, 1/30/2020 \| Cash Equivalents
Interest rate	2.02%
United States \| U.S. Treasury Bills, 1.89%, 2/06/2020 \| Cash Equivalents
Interest rate	1.89%
United States \| U.S. Treasury Bills, 1.87%, 2/13/2020 \| Cash Equivalents
Interest rate	1.87%
United States \| U.S. Treasury Bills, 1.85%, 2/20/2020 \| Cash Equivalents
Interest rate	1.85%
United States \| U.S. Treasury Bills, 1.85%, 2/27/2020 \| Cash Equivalents
Interest rate	1.85%
United States \| U.S. Treasury Bills, 1.83%, 3/05/2020 \| Cash Equivalents
Interest rate	1.83%
United States \| U.S. Treasury Bills, 1.84%, 3/19/2020 \| Cash Equivalents
Interest rate	1.84%
United States \| U.S. Treasury Bills, 1.88%, 3/26/2020 \| Cash Equivalents
Interest rate	1.88%