Statement of Changes in Shareholders' Equity - USD ($)	Total	General Shares [Member]	Shares [Member]
Balance - Value at Dec. 31, 2022	$ 1,072,706,930	$ 806	$ 1,072,706,124
Balance - Shares at Dec. 31, 2022		40	53,200,000
Purchases of Shares - Value	135,445,983		$ 135,445,983
Purchases of Shares - Shares			6,350,000
Redemption of Shares - Value	(530,223,496)		$ (530,223,496)
Redemption of Shares - Shares			(25,600,000)
Net Increase (Decrease) due to Share Transactions, value	(394,777,513)		$ (394,777,513)
Net Increase (Decrease) due to Share Transactions, shares			(19,250,000)
Return of Capital Distributions	(34,240,081)	$ (38)	$ (34,240,043)
Net Income (Loss)
Net Investment Income (Loss)	35,756,686	39	35,756,647
Net Realized Gain (Loss) on United States Treasury Obligations, Affiliated Investments and Commodity Futures Contracts	32,701,248	30	32,701,218
Net Change in Unrealized Gain (Loss) on United States Treasury Obligations, Affiliated Investments and Commodity Futures Contracts	(7,880,700)	(7)	(7,880,693)
Net Income (Loss)	60,577,234	62	60,577,172
Net Change in Shareholders' Equity, value	(368,440,360)	24	$ (368,440,384)
Net Change in Shareholders' Equity, shares			(19,250,000)
Balance - Value at Dec. 31, 2023	704,266,570	$ 830	$ 704,265,740
Balance - Shares at Dec. 31, 2023		40	33,950,000
Purchases of Shares - Value	146,581,643		$ 146,581,643
Purchases of Shares - Shares			5,850,000
Redemption of Shares - Value	(242,097,606)		$ (242,097,606)
Redemption of Shares - Shares			(10,200,000)
Net Increase (Decrease) due to Share Transactions, value	(95,515,963)		$ (95,515,963)
Net Increase (Decrease) due to Share Transactions, shares			(4,350,000)
Return of Capital Distributions	(31,763,587)	$ (43)	$ (31,763,544)
Net Income (Loss)
Net Investment Income (Loss)	31,513,291	43	31,513,248
Net Realized Gain (Loss) on United States Treasury Obligations, Affiliated Investments and Commodity Futures Contracts	112,377,239	147	112,377,092
Net Change in Unrealized Gain (Loss) on United States Treasury Obligations, Affiliated Investments and Commodity Futures Contracts	66,504,144	87	66,504,057
Net Income (Loss)	210,394,674	277	210,394,397
Net Change in Shareholders' Equity, value	83,115,124	234	$ 83,114,890
Net Change in Shareholders' Equity, shares			(4,350,000)
Balance - Value at Dec. 31, 2024	787,381,694	$ 1,064	$ 787,380,630
Balance - Shares at Dec. 31, 2024		40	29,600,000
Purchases of Shares - Value	176,609,663		$ 176,609,663
Purchases of Shares - Shares			6,500,000
Redemption of Shares - Value	(205,492,015)		$ (205,492,015)
Redemption of Shares - Shares			(7,800,000)
Net Increase (Decrease) due to Share Transactions, value	(28,882,352)		$ (28,882,352)
Net Increase (Decrease) due to Share Transactions, shares			(1,300,000)
Return of Capital Distributions	(25,865,726)	$ (37)	$ (25,865,689)
Net Income (Loss)
Net Investment Income (Loss)	26,373,992	38	26,373,954
Net Realized Gain (Loss) on United States Treasury Obligations, Affiliated Investments and Commodity Futures Contracts	24,130,345	28	24,130,317
Net Change in Unrealized Gain (Loss) on United States Treasury Obligations, Affiliated Investments and Commodity Futures Contracts	(60,335,352)	(71)	(60,335,281)
Net Income (Loss)	(9,831,015)	(5)	(9,831,010)
Net Change in Shareholders' Equity, value	(64,579,093)	(42)	$ (64,579,051)
Net Change in Shareholders' Equity, shares			(1,300,000)
Balance - Value at Dec. 31, 2025	$ 722,802,601	$ 1,022	$ 722,801,579
Balance - Shares at Dec. 31, 2025		40	28,300,000