Statement of Changes in Shareholders' Equity (Unaudited) - USD ($)	Total	Shares [Member]	General Shares [Member]
Balance - Value at Dec. 31, 2019	$ 1,428,657,083	$ 1,428,656,445	$ 638
Balance - Shares at Dec. 31, 2019		89,600,000	40
Purchases of Shares - Value	40,401,869	$ 40,401,869
Purchases of Shares - Shares		2,600,000
Redemption of Shares - Value	(310,734,938)	$ (310,734,938)
Redemption of Shares - Shares		(23,200,000)
Net Increase (Decrease) due to Share Transactions, value	(270,333,069)	$ (270,333,069)
Net Increase (Decrease) due to Share Transactions, shares		(20,600,000)
Net Income (Loss)
Net Investment Income (Loss)	2,261,243	$ 2,261,242	$ 1
Net Realized Gain (Loss) on United States Treasury Obligations, Affiliated Investments and Commodity Futures Contracts	(64,476,950)	(64,476,918)	(32)
Net Change in Unrealized Gain (Loss) on United States Treasury Obligations, Affiliated Investments and Commodity Futures Contracts	(316,909,208)	(316,909,053)	(155)
Net Income (Loss)	(379,124,915)	(379,124,729)	(186)
Net Change in Shareholders' Equity, value	(649,457,984)	$ (649,457,798)	(186)
Net Change in Shareholders' Equity, shares		(20,600,000)
Balance - Value at Mar. 31, 2020	779,199,099	$ 779,198,647	$ 452
Balance - Shares at Mar. 31, 2020		69,000,000	40
Balance - Value at Dec. 31, 2020	1,341,324,637	$ 1,341,324,051	$ 586
Balance - Shares at Dec. 31, 2020		91,500,000	40
Purchases of Shares - Value	510,665,514	$ 510,665,514
Purchases of Shares - Shares		31,200,000
Redemption of Shares - Value	(131,273,880)	$ (131,273,880)
Redemption of Shares - Shares		(8,200,000)
Net Increase (Decrease) due to Share Transactions, value	379,391,634	$ 379,391,634
Net Increase (Decrease) due to Share Transactions, shares		23,000,000
Net Income (Loss)
Net Investment Income (Loss)	(3,169,930)	$ (3,169,929)	$ (1)
Net Realized Gain (Loss) on United States Treasury Obligations, Affiliated Investments and Commodity Futures Contracts	68,206,899	68,206,870	29
Net Change in Unrealized Gain (Loss) on United States Treasury Obligations, Affiliated Investments and Commodity Futures Contracts	110,093,057	110,093,009	48
Net Income (Loss)	175,130,026	175,129,950	76
Net Change in Shareholders' Equity, value	554,521,660	$ 554,521,584	76
Net Change in Shareholders' Equity, shares		23,000,000
Balance - Value at Mar. 31, 2021	$ 1,895,846,297	$ 1,895,845,635	$ 662
Balance - Shares at Mar. 31, 2021		114,500,000	40