Schedule of Investments (Unaudited) - Treasury Bills and Affiliated Investments - USD ($)		Mar. 31, 2020		Dec. 31, 2019
Schedule of Investments [Line Items]
Percentage of Shareholders' Equity		100.71%		101.08%
United States Treasury Obligations, Value		$ 13,998,559		$ 14,963,000
Affiliated Investments, Value		22,283,672		50,061,710
Investments in Securities, Value		36,282,231		65,024,710
Investments in Securities, cost		$ 36,172,567		$ 64,987,634
Affiliated Investments [Member]
Schedule of Investments [Line Items]
Percentage of Shareholders' Equity		61.85%		77.82%
Affiliated Investments, Value		$ 22,283,672		$ 50,061,710
Affiliated investments, at cost		$ 22,206,027		$ 50,030,279
U.S. Treasury Bills, 1.505% due May 28, 2020 [Member]
Schedule of Investments [Line Items]
Percentage of Shareholders' Equity	[1],[2]	38.86%
United States Treasury Obligations, Value	[1],[2]	$ 13,998,559
United States Treasury Obligations, Principal Value	[1],[2]	$ 14,000,000
Investment Interest Rate	[1],[3]	1.505%
Investment Maturity Date	[1],[3]	May 28, 2020
Restricted for maintenance margin		$ 7,999,200
United States Treasury Obligations [Member]
Schedule of Investments [Line Items]
Percentage of Shareholders' Equity	[1]	38.86%		23.26%
United States Treasury Obligations, Value	[1]	$ 13,998,559		$ 14,963,000
Investments in Securities, cost		$ 13,966,540		$ 14,957,355
Exchange-Traded Fund - Invesco Treasury Collateral ETF [Member] | Affiliated Investments [Member]
Schedule of Investments [Line Items]
Percentage of Shareholders' Equity	[4]	28.06%		31.14%
Affiliated Investments, Value	[4]	$ 10,109,288		$ 20,031,492
Affiliated Investments, Shares	[4]	95,200		189,800
Affiliated investments, at cost	[4]	$ 10,031,643		$ 20,000,061
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		33.79%	[5]	46.68%	[6]
Affiliated Investments, Value		$ 12,174,384	[5]	$ 30,030,218	[6]
Affiliated Investments, Shares		12,174,384	[5]	30,030,218	[6]
Investment Interest Rate		0.54%	[5]	1.47%	[6]
Affiliated investments, at cost		$ 12,174,384	[5]	$ 30,030,218	[6]
U.S. Treasury Bills, 1.520% due February 6, 2020 [Member]
Schedule of Investments [Line Items]
Percentage of Shareholders' Equity	[1]			4.66%
United States Treasury Obligations, Value	[1]			$ 2,995,669
United States Treasury Obligations, Principal Value	[1]			$ 3,000,000
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],[3]			17.05%
United States Treasury Obligations, Value	[1],[3]			$ 10,971,173
United States Treasury Obligations, Principal Value	[1],[3]			$ 11,000,000
Investment Interest Rate	[1],[3]			1.56%
Investment Maturity Date	[1],[3]			Mar. 05, 2020
Restricted for maintenance margin				$ 8,178,680
U.S. Treasury Bills, 1.520% due April 2, 2020 [Member]
Schedule of Investments [Line Items]
Percentage of Shareholders' Equity	[1]			1.55%
United States Treasury Obligations, Value	[1]			$ 996,158
United States Treasury Obligations, Principal Value	[1]			$ 1,000,000
Investment Interest Rate	[1]			1.52%
Investment Maturity Date	[1]			Apr. 02, 2020

[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 $7,999,200 are on deposit with the Commodity Broker and held as maintenance margin for open futures contracts.

[3] United States Treasury Obligations of $8,178,680 are on deposit with the Commodity Broker and held as maintenance margin for open futures contracts.

[4] Affiliated company. The security and the Fund are affiliated by having the same investment adviser. See Note 8.

[5] The security and the Fund are advised by wholly-owned subsidiaries of Invesco Ltd. and are therefore considered to be affiliated. The rate shown is the 7-day SEC standardized yield as of March 31, 2020.

[6] The security and the Fund are advised by wholly-owned subsidiaries of Invesco Ltd. and are therefore considered to be affiliated. The rate shown is the 7-day SEC standardized yield as of December 31, 2019.