Statement of Changes in Shareholders' Equity (Unaudited) - USD ($)	Total	General Shares [Member]	Shares [Member]
Balance - Value at Dec. 31, 2020	$ 648,463,433	$ 645	$ 648,462,788
Balance - Shares at Dec. 31, 2020		40	40,200,000
Purchases of Shares - Value	213,129,234		$ 213,129,234
Purchases of Shares - Shares			12,600,000
Redemption of Shares - Value	(84,594,516)		$ (84,594,516)
Redemption of Shares - Shares			(5,000,000)
Net Increase (Decrease) due to Share Transactions, value	128,534,718		$ 128,534,718
Net Increase (Decrease) due to Share Transactions, shares			7,600,000
Net Income (Loss)
Net Investment Income (Loss)	(1,548,092)	$ (2)	$ (1,548,090)
Net Realized Gain (Loss) on United States Treasury Obligations, Affiliated Investments and Commodity Futures Contracts	40,274,232	40	40,274,192
Net Change in Unrealized Gain (Loss) on United States Treasury Obligations, Affiliated Investments and Commodity Futures Contracts	(7,481,024)	(7)	(7,481,017)
Net Income (Loss)	31,245,116	31	31,245,085
Net Change in Shareholders' Equity, value	159,779,834	31	$ 159,779,803
Net Change in Shareholders' Equity, shares			7,600,000
Balance - Value at Mar. 31, 2021	808,243,267	$ 676	$ 808,242,591
Balance - Shares at Mar. 31, 2021		40	47,800,000
Balance - Value at Dec. 31, 2021	1,018,200,047	$ 789	$ 1,018,199,258
Balance - Shares at Dec. 31, 2021		40	51,600,000
Purchases of Shares - Value	861,165,818		$ 861,165,818
Purchases of Shares - Shares			40,000,000
Redemption of Shares - Value	(120,886,358)		$ (120,886,358)
Redemption of Shares - Shares			(5,700,000)
Net Increase (Decrease) due to Share Transactions, value	740,279,460		$ 740,279,460
Net Increase (Decrease) due to Share Transactions, shares			34,300,000
Net Income (Loss)
Net Investment Income (Loss)	(2,545,035)	$ (2)	$ (2,545,033)
Net Realized Gain (Loss) on United States Treasury Obligations, Affiliated Investments and Commodity Futures Contracts	45,644,549	33	45,644,516
Net Change in Unrealized Gain (Loss) on United States Treasury Obligations, Affiliated Investments and Commodity Futures Contracts	76,327,165	54	76,327,111
Net Income (Loss)	119,426,679	85	119,426,594
Net Change in Shareholders' Equity, value	859,706,139	85	$ 859,706,054
Net Change in Shareholders' Equity, shares			34,300,000
Balance - Value at Mar. 31, 2022	$ 1,877,906,186	$ 874	$ 1,877,905,312
Balance - Shares at Mar. 31, 2022		40	85,900,000