Schedule of Investments (Unaudited) - Treasury Bills and Money Market Fund - USD ($)		Sep. 30, 2020	Dec. 31, 2019
Schedule of Investments [Line Items]
Percentage of Shareholders' Equity		96.83%	100.29%
United States Treasury Obligations, Value		$ 369,962,827	$ 664,863,392
Affiliated Investments, Value		648,816,139	767,882,587
Investments in Securities, Value		1,018,778,966	1,432,745,979
Investments in Securities, Cost		1,018,159,495	$ 1,432,111,774
Restricted for maintenance margin		$ 129,987,000
Affiliated Investments [Member]
Schedule of Investments [Line Items]
Percentage of Shareholders' Equity		61.67%	53.75%
Affiliated Investments, Value		$ 648,816,139	$ 767,882,587
Affiliated Investments, at Cost		$ 648,207,210	$ 767,489,717
US Treasury Bills, 0.090% Due October 15, 2020 [Member]
Schedule of Investments [Line Items]
Percentage of Shareholders' Equity	[1],[2]	15.21%
United States Treasury Obligations, Value	[1],[2]	$ 159,995,800
United States Treasury Obligations, Principal Value	[1],[2]	$ 160,000,000
Investment Interest Rate	[2]	0.09%
Investment Maturity Date	[2]	Oct. 15, 2020
US Treasury Bills, 0.085% Due November 12, 2020 [Member]
Schedule of Investments [Line Items]
Percentage of Shareholders' Equity	[1],[2]	4.75%
United States Treasury Obligations, Value	[1],[2]	$ 49,995,261
United States Treasury Obligations, Principal Value	[1],[2]	$ 50,000,000
Investment Interest Rate	[2]	0.085%
Investment Maturity Date	[2]	Nov. 12, 2020
US Treasury Bills, 0.110% Due December 17, 2020 [Member]
Schedule of Investments [Line Items]
Percentage of Shareholders' Equity	[1]	15.20%
United States Treasury Obligations, Value	[1]	$ 159,971,766
United States Treasury Obligations, Principal Value	[1]	$ 160,000,000
Investment Interest Rate	[1]	0.11%
Investment Maturity Date	[1]	Dec. 17, 2020
United States Treasury Obligations [Member]
Schedule of Investments [Line Items]
Percentage of Shareholders' Equity	[1]	35.16%	46.54%
United States Treasury Obligations, Value	[1]	$ 369,962,827	$ 664,863,392
Investments in Securities, Cost	[1]	$ 369,952,285	$ 664,622,057
Exchange-Traded Fund [Member] | Affiliated Investments [Member]
Schedule of Investments [Line Items]
Percentage of Shareholders' Equity	[3]	17.21%	17.53%
Affiliated Investments, Value	[3]	$ 181,052,052	$ 250,383,096
Affiliated Investments, Shares	[3]	1,712,400	2,372,400
Affiliated Investments, at Cost	[3]	$ 180,443,123	$ 249,990,226
Money Market Mutual Fund - Invesco Government and Agency Portfolio - Institutional Class [Member] | Affiliated Investments [Member]
Schedule of Investments [Line Items]
Percentage of Shareholders' Equity	[3],[4]	44.46%
Affiliated Investments, Value	[3],[4]	$ 467,764,087
Affiliated Investments, Shares	[3],[4]	467,764,087
Investment Interest Rate	[3],[4]	0.02%
Affiliated Investments, at Cost	[3],[4]	$ 467,764,087
U.S. Treasury Bills, 1.520% due February 6, 2020 [Member]
Schedule of Investments [Line Items]
Percentage of Shareholders' Equity	[1]		11.74%
United States Treasury Obligations, Value	[1]		$ 167,757,450
United States Treasury Obligations, Principal Value	[1]		$ 168,000,000
Investment Interest Rate	[1]		1.52%
Investment Maturity Date	[1]		Feb. 06, 2020
U.S. Treasury Bills, 1.560% due March 5, 2020 [Member]
Schedule of Investments [Line Items]
Percentage of Shareholders' Equity	[1]		1.33%
United States Treasury Obligations, Value	[1]		$ 18,950,208
United States Treasury Obligations, Principal Value	[1]		$ 19,000,000
Investment Interest Rate	[1]		1.56%
Investment Maturity Date	[1]		Mar. 05, 2020
U.S. Treasury Bills, 1.520% due April 2, 2020 [Member]
Schedule of Investments [Line Items]
Percentage of Shareholders' Equity	[1],[5]		33.47%
United States Treasury Obligations, Value	[1],[5]		$ 478,155,734
United States Treasury Obligations, Principal Value	[1],[5]		$ 480,000,000
Investment Interest Rate	[1],[5]		1.52%
Investment Maturity Date	[1],[5]		Apr. 02, 2020
Restricted for maintenance margin			$ 153,399,400
Money Market Mutual Fund - Invesco Premier U.S. Government Money Portfolio - Institutional Class [Member] | Affiliated Investments [Member]
Schedule of Investments [Line Items]
Percentage of Shareholders' Equity	[3],[6]		36.22%
Affiliated Investments, Value	[3],[6]		$ 517,499,491
Affiliated Investments, Shares	[3],[6]		517,499,491
Investment Interest Rate	[3],[6]		1.47%
Affiliated Investments, at Cost	[3],[6]		$ 517,499,491

[1] Security may be traded on a discount basis. The interest rate shown represents the discount rate at the most recent auction date of the security prior to period end.

[2] United States Treasury Obligations of $129,987,000 are on deposit with the Commodity Broker and held as maintenance margin for open futures contracts.

[3] Affiliated issuer. The issuer and/or the Fund is a wholly-owned subsidiary of Invesco Ltd., or is affiliated by having an investment adviser that is under common control of Invesco Ltd. See Note 8.

[4] The rate shown is the 7-day SEC standardized yield as of September 30, 2020.

[5] United States Treasury Obligations of $153,399,400 are on deposit with the Commodity Broker and held as maintenance margin for open futures contracts.

[6] The rate shown is the 7-day SEC standardized yield as of December 31, 2019.