Statement of Changes in Shareholders' Equity (Unaudited) - USD ($)	Total	General Shares [Member]	Shares [Member]
Balance - Value at Dec. 31, 2020	$ 173,836,791	$ 688	$ 173,836,103
Balance - Shares at Dec. 31, 2020		40	10,100,000
Purchases of Shares - Value	271,387,492		$ 271,387,492
Purchases of Shares - Shares			13,900,000
Redemption of Shares - Value	(70,422,688)		$ (70,422,688)
Redemption of Shares - Shares			(3,500,000)
Net Increase (Decrease) due to Share Transactions, value	200,964,804		$ 200,964,804
Net Increase (Decrease) due to Share Transactions, shares			10,400,000
Net Income (Loss)
Net Investment Income (Loss)	(1,840,646)	$ (5)	$ (1,840,641)
Net Realized Gain (Loss) on United States Treasury Obligations, Affiliated Investments and Commodity Futures Contracts	63,331,799	180	63,331,619
Net Change in Unrealized Gain (Loss) on United States Treasury Obligations, Affiliated Investments and Commodity Futures Contracts	(12,634,628)	(36)	(12,634,592)
Net Income (Loss)	48,856,525	139	48,856,386
Net Change in Shareholders' Equity, value	249,821,329	139	$ 249,821,190
Net Change in Shareholders' Equity, shares			10,400,000
Balance - Value at Sep. 30, 2021	423,658,120	$ 827	$ 423,657,293
Balance - Shares at Sep. 30, 2021		40	20,500,000
Balance - Value at Jun. 30, 2021	382,952,099	$ 806	$ 382,951,293
Balance - Shares at Jun. 30, 2021		40	19,000,000
Purchases of Shares - Value	58,962,767		$ 58,962,767
Purchases of Shares - Shares			2,900,000
Redemption of Shares - Value	(28,366,423)		$ (28,366,423)
Redemption of Shares - Shares			(1,400,000)
Net Increase (Decrease) due to Share Transactions, value	30,596,344		$ 30,596,344
Net Increase (Decrease) due to Share Transactions, shares			1,500,000
Net Income (Loss)
Net Investment Income (Loss)	(772,894)	$ (2)	$ (772,892)
Net Realized Gain (Loss) on United States Treasury Obligations, Affiliated Investments and Commodity Futures Contracts	13,714,916	29	13,714,887
Net Change in Unrealized Gain (Loss) on United States Treasury Obligations, Affiliated Investments and Commodity Futures Contracts	(2,832,345)	(6)	(2,832,339)
Net Income (Loss)	10,109,677	21	10,109,656
Net Change in Shareholders' Equity, value	40,706,021	21	$ 40,706,000
Net Change in Shareholders' Equity, shares			1,500,000
Balance - Value at Sep. 30, 2021	423,658,120	$ 827	$ 423,657,293
Balance - Shares at Sep. 30, 2021		40	20,500,000
Balance - Value at Dec. 31, 2021	487,186,183	$ 886	$ 487,185,297
Balance - Shares at Dec. 31, 2021		40	22,000,000
Purchases of Shares - Value	245,398,976		$ 245,398,976
Purchases of Shares - Shares			10,300,000
Redemption of Shares - Value	(348,219,434)		$ (348,219,434)
Redemption of Shares - Shares			(16,000,000)
Net Increase (Decrease) due to Share Transactions, value	(102,820,458)		$ (102,820,458)
Net Increase (Decrease) due to Share Transactions, shares			(5,700,000)
Net Income (Loss)
Net Investment Income (Loss)	324,861	$ 1	$ 324,860
Net Realized Gain (Loss) on United States Treasury Obligations, Affiliated Investments and Commodity Futures Contracts	43,478,244	79	43,478,165
Net Change in Unrealized Gain (Loss) on United States Treasury Obligations, Affiliated Investments and Commodity Futures Contracts	(134,465,517)	(245)	(134,465,272)
Net Income (Loss)	(90,662,412)	(165)	(90,662,247)
Net Change in Shareholders' Equity, value	(193,482,870)	(165)	$ (193,482,705)
Net Change in Shareholders' Equity, shares			(5,700,000)
Balance - Value at Sep. 30, 2022	293,703,313	$ 721	$ 293,702,592
Balance - Shares at Sep. 30, 2022		40	16,300,000
Balance - Value at Jun. 30, 2022	387,339,128	$ 782	$ 387,338,346
Balance - Shares at Jun. 30, 2022		40	19,800,000
Purchases of Shares - Value	26,775,982		$ 26,775,982
Purchases of Shares - Shares			1,400,000
Redemption of Shares - Value	(92,442,435)		$ (92,442,435)
Redemption of Shares - Shares			(4,900,000)
Net Increase (Decrease) due to Share Transactions, value	(65,666,453)		$ (65,666,453)
Net Increase (Decrease) due to Share Transactions, shares			(3,500,000)
Net Income (Loss)
Net Investment Income (Loss)	1,438,814	$ 3	$ 1,438,811
Net Realized Gain (Loss) on United States Treasury Obligations, Affiliated Investments and Commodity Futures Contracts	(36,960,677)	(54)	(36,960,623)
Net Change in Unrealized Gain (Loss) on United States Treasury Obligations, Affiliated Investments and Commodity Futures Contracts	7,552,501	(10)	7,552,511
Net Income (Loss)	(27,969,362)	(61)	(27,969,301)
Net Change in Shareholders' Equity, value	(93,635,815)	(61)	$ (93,635,754)
Net Change in Shareholders' Equity, shares			(3,500,000)
Balance - Value at Sep. 30, 2022	$ 293,703,313	$ 721	$ 293,702,592
Balance - Shares at Sep. 30, 2022		40	16,300,000