Statement of Changes in Shareholders' Equity - USD ($)	Total	General Shares [Member]	Shares [Member]
Balance - Value at Dec. 31, 2021	$ 2,629,545,115	$ 829	$ 2,629,544,286
Balance - Shares at Dec. 31, 2021		40	126,900,000
Purchases of Shares - Value	2,336,302,006		$ 2,336,302,006
Purchases of Shares - Shares			92,400,000
Redemption of Shares - Value	(2,864,026,655)		$ (2,864,026,655)
Redemption of Shares - Shares			(112,300,000)
Net Increase (Decrease) due to Share Transactions, value	(527,724,649)		$ (527,724,649)
Net Increase (Decrease) due to Share Transactions, shares			(19,900,000)
Return of Capital Distributions	(16,159,645)	$ (6)	$ (16,159,639)
Net Income (Loss)
Net Investment Income (Loss)	19,356,347	7	19,356,340
Net Realized Gain (Loss) on United States Treasury Obligations, Affiliated Investments and Commodity Futures Contracts	732,256,477	215	732,256,262
Net Change in Unrealized Gain (Loss) on United States Treasury Obligations, Affiliated Investments and Commodity Futures Contracts	(199,822,754)	(59)	(199,822,695)
Net Income (Loss)	551,790,070	163	551,789,907
Net Change in Shareholders' Equity, value	7,905,776	157	$ 7,905,619
Net Change in Shareholders' Equity, shares			(19,900,000)
Balance - Value at Dec. 31, 2022	2,637,450,891	$ 986	$ 2,637,449,905
Balance - Shares at Dec. 31, 2022		40	107,000,000
Purchases of Shares - Value	370,325,566		$ 370,325,566
Purchases of Shares - Shares			15,400,000
Redemption of Shares - Value	(1,087,834,781)		$ (1,087,834,781)
Redemption of Shares - Shares			(46,050,000)
Net Increase (Decrease) due to Share Transactions, value	(717,509,215)		$ (717,509,215)
Net Increase (Decrease) due to Share Transactions, shares			(30,650,000)
Return of Capital Distributions	(84,798,935)	$ (44)	$ (84,798,891)
Net Income (Loss)
Net Investment Income (Loss)	90,199,945	46	90,199,899
Net Realized Gain (Loss) on United States Treasury Obligations, Affiliated Investments and Commodity Futures Contracts	(248,497,642)	(109)	(248,497,533)
Net Change in Unrealized Gain (Loss) on United States Treasury Obligations, Affiliated Investments and Commodity Futures Contracts	6,587,312	3	6,587,309
Net Income (Loss)	(151,710,385)	(60)	(151,710,325)
Net Change in Shareholders' Equity, value	(954,018,535)	(104)	$ (954,018,431)
Net Change in Shareholders' Equity, shares			(30,650,000)
Balance - Value at Dec. 31, 2023	1,683,432,356	$ 882	$ 1,683,431,474
Balance - Shares at Dec. 31, 2023		40	76,350,000
Purchases of Shares - Value	208,115,689		$ 208,115,689
Purchases of Shares - Shares			9,100,000
Redemption of Shares - Value	(562,237,400)		$ (562,237,400)
Redemption of Shares - Shares			(25,300,000)
Net Increase (Decrease) due to Share Transactions, value	(354,121,711)		$ (354,121,711)
Net Increase (Decrease) due to Share Transactions, shares			(16,200,000)
Return of Capital Distributions	(67,507,155)	$ (45)	$ (67,507,110)
Net Income (Loss)
Net Investment Income (Loss)	69,103,543	46	69,103,497
Net Realized Gain (Loss) on United States Treasury Obligations, Affiliated Investments and Commodity Futures Contracts	(56,339,168)	(35)	(56,339,133)
Net Change in Unrealized Gain (Loss) on United States Treasury Obligations, Affiliated Investments and Commodity Futures Contracts	9,618,035	6	9,618,029
Net Income (Loss)	22,382,410	17	22,382,393
Net Change in Shareholders' Equity, value	(399,246,456)	(28)	$ (399,246,428)
Net Change in Shareholders' Equity, shares			(16,200,000)
Balance - Value at Dec. 31, 2024	$ 1,284,185,900	$ 854	$ 1,284,185,046
Balance - Shares at Dec. 31, 2024		40	60,150,000