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	1,670,462,684		$ 1,670,462,684
Purchases of Shares - Shares			62,800,000
Redemption of Shares - Value	(1,123,886,037)		$ (1,123,886,037)
Redemption of Shares - Shares			(42,400,000)
Net Increase (Decrease) due to Share Transactions, value	546,576,647		$ 546,576,647
Net Increase (Decrease) due to Share Transactions, shares			20,400,000
Net Income (Loss)
Net Investment Income (Loss)	(688,948)		$ (688,948)
Net Realized Gain (Loss) on United States Treasury Obligations, Affiliated Investments and Currency Futures Contracts	(36,680,061)	$ (26)	(36,680,035)
Net Change in Unrealized Gain (Loss) on United States Treasury Obligations, Affiliated Investments and Currency Futures Contracts	3,088,321	2	3,088,319
Net Income (Loss)	(34,280,688)	(24)	(34,280,664)
Net Change in Shareholders' Equity, value	512,295,959	(24)	$ 512,295,983
Net Change in Shareholders' Equity, shares			20,400,000
Balance - Value at Sep. 30, 2020	740,613,176	$ 1,014	$ 740,612,162
Balance - Shares at Sep. 30, 2020		40	29,200,000
Balance - Value at Jun. 30, 2020	463,344,074	$ 1,053	$ 463,343,021
Balance - Shares at Jun. 30, 2020		40	17,600,000
Purchases of Shares - Value	456,910,185		$ 456,910,185
Purchases of Shares - Shares			18,000,000
Redemption of Shares - Value	(164,446,662)		$ (164,446,662)
Redemption of Shares - Shares			(6,400,000)
Net Increase (Decrease) due to Share Transactions, value	292,463,523		$ 292,463,523
Net Increase (Decrease) due to Share Transactions, shares			11,600,000
Net Income (Loss)
Net Investment Income (Loss)	(614,731)		$ (614,731)
Net Realized Gain (Loss) on United States Treasury Obligations, Affiliated Investments and Currency Futures Contracts	(11,618,483)	$ (46)	(11,618,437)
Net Change in Unrealized Gain (Loss) on United States Treasury Obligations, Affiliated Investments and Currency Futures Contracts	(2,961,207)	7	(2,961,214)
Net Income (Loss)	(15,194,421)	(39)	(15,194,382)
Net Change in Shareholders' Equity, value	277,269,102	(39)	$ 277,269,141
Net Change in Shareholders' Equity, shares			11,600,000
Balance - Value at Sep. 30, 2020	740,613,176	$ 1,014	$ 740,612,162
Balance - Shares at Sep. 30, 2020		40	29,200,000
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	460,882,194		$ 460,882,194
Purchases of Shares - Shares			18,700,000
Redemption of Shares - Value	(356,730,650)		$ (356,730,650)
Redemption of Shares - Shares			(14,500,000)
Net Increase (Decrease) due to Share Transactions, value	104,151,544		$ 104,151,544
Net Increase (Decrease) due to Share Transactions, shares			4,200,000
Net Income (Loss)
Net Investment Income (Loss)	(2,145,948)	$ (5)	$ (2,145,943)
Net Realized Gain (Loss) on United States Treasury Obligations, Affiliated Investments and Currency Futures Contracts	7,653,997	18	7,653,979
Net Change in Unrealized Gain (Loss) on United States Treasury Obligations, Affiliated Investments and Currency Futures Contracts	12,445,835	29	12,445,806
Net Income (Loss)	17,953,884	42	17,953,842
Net Change in Shareholders' Equity, value	122,105,428	42	$ 122,105,386
Net Change in Shareholders' Equity, shares			4,200,000
Balance - Value at Sep. 30, 2021	488,291,243	$ 1,012	$ 488,290,231
Balance - Shares at Sep. 30, 2021		40	19,300,000
Balance - Value at Jun. 30, 2021	430,025,576	$ 994	$ 430,024,582
Balance - Shares at Jun. 30, 2021		40	17,300,000
Purchases of Shares - Value	112,416,781		$ 112,416,781
Purchases of Shares - Shares			4,500,000
Redemption of Shares - Value	(62,379,989)		$ (62,379,989)
Redemption of Shares - Shares			(2,500,000)
Net Increase (Decrease) due to Share Transactions, value	50,036,792		$ 50,036,792
Net Increase (Decrease) due to Share Transactions, shares			2,000,000
Net Income (Loss)
Net Investment Income (Loss)	(831,722)	$ (2)	$ (831,720)
Net Realized Gain (Loss) on United States Treasury Obligations, Affiliated Investments and Currency Futures Contracts	11,195,317	27	11,195,290
Net Change in Unrealized Gain (Loss) on United States Treasury Obligations, Affiliated Investments and Currency Futures Contracts	(2,134,720)	(7)	(2,134,713)
Net Income (Loss)	8,228,875	18	8,228,857
Net Change in Shareholders' Equity, value	58,265,667	18	$ 58,265,649
Net Change in Shareholders' Equity, shares			2,000,000
Balance - Value at Sep. 30, 2021	$ 488,291,243	$ 1,012	$ 488,290,231
Balance - Shares at Sep. 30, 2021		40	19,300,000