Statement of Changes in Shareholders' Equity (Unaudited) - USD ($)	Total	General Shares [Member]	Shares [Member]
Balance - Value at Dec. 31, 2019	$ 228,317,217	$ 1,038	$ 228,316,179
Balance - Shares at Dec. 31, 2019		40	8,800,000
Purchases of Shares - Value	1,213,552,499		$ 1,213,552,499
Purchases of Shares - Shares			44,800,000
Redemption of Shares - Value	(959,439,375)		$ (959,439,375)
Redemption of Shares - Shares			(36,000,000)
Net Increase (Decrease) due to Share Transactions, value	254,113,124		$ 254,113,124
Net Increase (Decrease) due to Share Transactions, shares			8,800,000
Net Income (Loss)
Net Investment Income (Loss)	(74,217)		$ (74,217)
Net Realized Gain (Loss) on United States Treasury Obligations, Affiliated Investments and Currency Futures Contracts	(25,061,578)	$ 20	(25,061,598)
Net Change in Unrealized Gain (Loss) on United States Treasury Obligations, Affiliated Investments and Currency Futures Contracts	6,049,528	(5)	6,049,533
Net Income (Loss)	(19,086,267)	15	(19,086,282)
Net Change in Shareholders' Equity, value	235,026,857	15	$ 235,026,842
Net Change in Shareholders' Equity, shares			8,800,000
Balance - Value at Jun. 30, 2020	463,344,074	$ 1,053	$ 463,343,021
Balance - Shares at Jun. 30, 2020		40	17,600,000
Balance - Value at Mar. 31, 2020	976,671,674	$ 1,073	$ 976,670,601
Balance - Shares at Mar. 31, 2020		40	36,400,000
Purchases of Shares - Value	322,482,764		$ 322,482,764
Purchases of Shares - Shares			12,000,000
Redemption of Shares - Value	(817,621,425)		$ (817,621,425)
Redemption of Shares - Shares			(30,800,000)
Net Increase (Decrease) due to Share Transactions, value	(495,138,661)		$ (495,138,661)
Net Increase (Decrease) due to Share Transactions, shares			(18,800,000)
Net Income (Loss)
Net Investment Income (Loss)	(702,180)	$ 25	$ (702,205)
Net Realized Gain (Loss) on United States Treasury Obligations, Affiliated Investments and Currency Futures Contracts	(28,709,082)	162	(28,709,244)
Net Change in Unrealized Gain (Loss) on United States Treasury Obligations, Affiliated Investments and Currency Futures Contracts	11,222,323	(207)	11,222,530
Net Income (Loss)	(18,188,939)	(20)	(18,188,919)
Net Change in Shareholders' Equity, value	(513,327,600)	(20)	$ (513,327,580)
Net Change in Shareholders' Equity, shares			(18,800,000)
Balance - Value at Jun. 30, 2020	463,344,074	$ 1,053	$ 463,343,021
Balance - Shares at Jun. 30, 2020		40	17,600,000
Balance - Value at Dec. 31, 2020	366,185,815	$ 970	$ 366,184,845
Balance - Shares at Dec. 31, 2020		40	15,100,000
Purchases of Shares - Value	348,465,413		$ 348,465,413
Purchases of Shares - Shares			14,200,000
Redemption of Shares - Value	(294,350,661)		$ (294,350,661)
Redemption of Shares - Shares			(12,000,000)
Net Increase (Decrease) due to Share Transactions, value	54,114,752		$ 54,114,752
Net Increase (Decrease) due to Share Transactions, shares			2,200,000
Net Income (Loss)
Net Investment Income (Loss)	(1,314,226)	$ (3)	$ (1,314,223)
Net Realized Gain (Loss) on United States Treasury Obligations, Affiliated Investments and Currency Futures Contracts	(3,541,320)	(9)	(3,541,311)
Net Change in Unrealized Gain (Loss) on United States Treasury Obligations, Affiliated Investments and Currency Futures Contracts	14,580,555	36	14,580,519
Net Income (Loss)	9,725,009	24	9,724,985
Net Change in Shareholders' Equity, value	63,839,761	24	$ 63,839,737
Net Change in Shareholders' Equity, shares			2,200,000
Balance - Value at Jun. 30, 2021	430,025,576	$ 994	$ 430,024,582
Balance - Shares at Jun. 30, 2021		40	17,300,000
Balance - Value at Mar. 31, 2021	376,680,782	$ 1,004	$ 376,679,778
Balance - Shares at Mar. 31, 2021		40	15,000,000
Purchases of Shares - Value	132,105,243		$ 132,105,243
Purchases of Shares - Shares			5,400,000
Redemption of Shares - Value	(76,083,857)		$ (76,083,857)
Redemption of Shares - Shares			(3,100,000)
Net Increase (Decrease) due to Share Transactions, value	56,021,386		$ 56,021,386
Net Increase (Decrease) due to Share Transactions, shares			2,300,000
Net Income (Loss)
Net Investment Income (Loss)	(695,230)	$ (1)	$ (695,229)
Net Realized Gain (Loss) on United States Treasury Obligations, Affiliated Investments and Currency Futures Contracts	(6,643,197)	(18)	(6,643,179)
Net Change in Unrealized Gain (Loss) on United States Treasury Obligations, Affiliated Investments and Currency Futures Contracts	4,661,835	9	4,661,826
Net Income (Loss)	(2,676,592)	(10)	(2,676,582)
Net Change in Shareholders' Equity, value	53,344,794	(10)	$ 53,344,804
Net Change in Shareholders' Equity, shares			2,300,000
Balance - Value at Jun. 30, 2021	$ 430,025,576	$ 994	$ 430,024,582
Balance - Shares at Jun. 30, 2021		40	17,300,000