Schedule of Investments (Unaudited) - Treasury Bills and Money Market Fund - USD ($)		Mar. 31, 2020		Dec. 31, 2019
Schedule of Investments [Line Items]
Percentage of Shareholders' Equity		97.52%		100.29%
United States Treasury Obligations, Value		$ 474,944,195		$ 664,863,392
Affiliated Investments, Value		284,958,450		767,882,587
Investments in Securities, Value		759,902,645		1,432,745,979
Investments in Securities, Cost		$ 757,591,880		$ 1,432,111,774
Affiliated Investments [Member]
Schedule of Investments [Line Items]
Percentage of Shareholders' Equity		36.57%		53.75%
Affiliated Investments, Value		$ 284,958,450		$ 767,882,587
Affiliated Investments, at Cost		$ 283,023,520		$ 767,489,717
US Treasury Bills, 1.520% Due April 2, 2020 [Member]
Schedule of Investments [Line Items]
Percentage of Shareholders' Equity	[1]	16.68%	[2]	33.47%	[3]
United States Treasury Obligations, Value	[1]	$ 130,000,035	[2]	$ 478,155,734	[3]
United States Treasury Obligations, Principal Value	[1]	$ 130,000,000	[2]	$ 480,000,000	[3]
Investment Interest Rate	[1]	1.52%	[2]	1.52%	[3]
Investment Maturity Date	[1]	Apr. 02, 2020	[2]	Apr. 02, 2020	[3]
Restricted for maintenance margin		$ 154,000,000		$ 153,399,400
US Treasury Bills, 1.505% Due May 28, 2020 [Member]
Schedule of Investments [Line Items]
Percentage of Shareholders' Equity	[1]	23.74%
United States Treasury Obligations, Value	[1]	$ 184,980,960
United States Treasury Obligations, Principal Value	[1]	$ 185,000,000
Investment Interest Rate	[1]	1.505%
Investment Maturity Date	[1]	May 28, 2020
U.S. Treasury Bills, 0.085% Due July 2, 2020 [Member]
Schedule of Investments [Line Items]
Percentage of Shareholders' Equity	[1]	20.53%
United States Treasury Obligations, Value	[1]	$ 159,963,200
United States Treasury Obligations, Principal Value	[1]	$ 160,000,000
Investment Interest Rate	[1]	0.085%
Investment Maturity Date	[1]	Jul. 02, 2020
United States Treasury Obligations [Member]
Schedule of Investments [Line Items]
Percentage of Shareholders' Equity	[1]	60.95%		46.54%
United States Treasury Obligations, Value	[1]	$ 474,944,195		$ 664,863,392
Investments in Securities, Cost	[1]	$ 474,568,360		$ 664,622,057
Exchange-Traded Fund [Member] | Affiliated Investments [Member]
Schedule of Investments [Line Items]
Percentage of Shareholders' Equity	[4]	32.33%		17.53%
Affiliated Investments, Value	[4]	$ 251,925,156		$ 250,383,096
Affiliated Investments, Shares	[4]	2,372,400		2,372,400
Affiliated Investments, at Cost	[4]	$ 249,990,226		$ 249,990,226
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		4.24%	[5]	36.22%	[6]
Affiliated Investments, Value		$ 33,033,294	[5]	$ 517,499,491	[6]
Affiliated Investments, Shares		33,033,294	[5]	517,499,491	[6]
Investment Interest Rate		0.54%	[5]	1.47%	[6]
Affiliated Investments, at Cost		$ 33,033,294	[5]	$ 517,499,491	[6]
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

[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 $154,000,000 are on deposit with the Commodity Broker and held as maintenance margin for open futures contracts.

[3] United States Treasury Obligations of $153,399,400 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.