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		98.00%		100.42%
United States Treasury Obligations, Value		$ 111,993,384		$ 123,646,647
Affiliated Investments, Value		845,180,412		105,630,007
Investments in Securities, Value		957,173,796		229,276,654
Investments in Securities, Cost		956,655,628		229,340,530
Restricted for maintenance margin		$ 34,995,000		$ 8,068,540
Affiliated Investments [Member]
Schedule of Investments [Line Items]
Percentage of Shareholders' Equity		86.53%		46.26%
Affiliated Investments, Value		$ 845,180,412		$ 105,630,007
Affiliated Investments, at Cost		$ 844,801,306		$ 105,742,951
U.S. Treasury Bills, 1.520% due April 2, 2020 [Member]
Schedule of Investments [Line Items]
Percentage of Shareholders' Equity		5.73%		24.44%	[1]
United States Treasury Obligations, Value		$ 56,000,015		$ 55,784,836	[1]
United States Treasury Obligations, Principal Value		$ 56,000,000		$ 56,000,000	[1]
Investment Interest Rate		1.52%		1.52%	[1]
Investment Maturity Date		Apr. 02, 2020		Apr. 02, 2020	[1]
U.S. Treasury Bills, 1.505% due May 28, 2020 [Member]
Schedule of Investments [Line Items]
Percentage of Shareholders' Equity	[2]	4.20%
United States Treasury Obligations, Value	[2]	$ 40,995,780
United States Treasury Obligations, Principal Value	[2]	$ 41,000,000
Investment Interest Rate	[2]	1.505%
Investment Maturity Date	[2]	May 28, 2020
U.S. Treasury Bills, 0.050% due June 11, 2020 [Member]
Schedule of Investments [Line Items]
Percentage of Shareholders' Equity	[2]	1.54%
United States Treasury Obligations, Value	[2]	$ 14,997,589
United States Treasury Obligations, Principal Value	[2]	$ 15,000,000
Investment Interest Rate	[2]	0.05%
Investment Maturity Date	[2]	Jun. 11, 2020
United States Treasury Obligations [Member]
Schedule of Investments [Line Items]
Percentage of Shareholders' Equity		11.47%		54.16%
United States Treasury Obligations, Value		$ 111,993,384		$ 123,646,647
Investments in Securities, Cost		$ 111,854,322		$ 123,597,579
Exchange-Traded Fund [Member] | Affiliated Investments [Member]
Schedule of Investments [Line Items]
Percentage of Shareholders' Equity	[3]	8.23%		34.99%
Affiliated Investments, Value	[3]	$ 80,385,830		$ 79,893,780
Affiliated Investments, Shares	[3]	757,000		757,000
Affiliated Investments, at Cost	[3]	$ 80,006,724		$ 80,006,724
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		78.30%	[4]	11.27%	[5]
Affiliated Investments, Value		$ 764,794,582	[4]	$ 25,736,227	[5]
Affiliated Investments, Shares		764,794,582	[4]	25,736,227	[5]
Investment Interest Rate		0.54%	[4]	1.47%	[5]
Investments in Securities, Cost		$ 764,794,582	[4]	$ 25,736,227	[5]
US Treasury Bills, 1.520% Due February 6, 2020 [Member]
Schedule of Investments [Line Items]
Percentage of Shareholders' Equity				14.87%
United States Treasury Obligations, Value				$ 33,950,912
United States Treasury Obligations, Principal Value				$ 34,000,000
Investment Interest Rate				1.52%
Investment Maturity Date				Feb. 06, 2020
US Treasury Bills, 1.560% Due March 5, 2020 [Member]
Schedule of Investments [Line Items]
Percentage of Shareholders' Equity	[1]			14.85%
United States Treasury Obligations, Value	[1]			$ 33,910,899
United States Treasury Obligations, Principal Value	[1]			$ 34,000,000
Investment Interest Rate	[1]			1.56%
Investment Maturity Date	[1]			Mar. 05, 2020

[1] United States Treasury Obligations of $8,068,540 are on deposit with the Commodity Broker and held as maintenance margin for open futures contracts.

[2] United States Treasury Obligations of $34,995,000 are on deposit with the Commodity Broker and held as maintenance margin for open futures contracts.

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

[4] 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.

[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 December 31, 2019.