Statement of Changes in Shareholders' Equity (Unaudited) - USD ($)	Total	General Shares [Member]	Shares [Member]
Balance - Value at Dec. 31, 2018	$ 494,352,592	$ 1,019	$ 494,351,573
Balance - Shares at Dec. 31, 2018		40	19,400,000
Purchases of Shares - Value	147,608,322		$ 147,608,322
Purchases of Shares - Shares			5,600,000
Redemption of Shares - Value	(332,083,125)		$ (332,083,125)
Redemption of Shares - Shares			(12,800,000)
Net Increase (Decrease) due to Share Transactions, value	(184,474,803)		$ (184,474,803)
Net Increase (Decrease) due to Share Transactions, shares			(7,200,000)
Net Income (Loss)
Net Investment Income (Loss)	4,312,552	$ 14	$ 4,312,538
Net Realized Gain (Loss) on United States Treasury Obligations, Affiliated Investments and Currency Futures Contracts	8,251,398	26	8,251,372
Net Change in Unrealized Gain (Loss) on United States Treasury Obligations, Affiliated Investments and Currency Futures Contracts	8,022,329	25	8,022,304
Net Income (Loss)	20,586,279	65	20,586,214
Net Change in Shareholders' Equity, value	(163,888,524)	65	$ (163,888,589)
Net Change in Shareholders' Equity, shares			(7,200,000)
Balance - Value at Sep. 30, 2019	330,464,068	$ 1,084	$ 330,462,984
Balance - Shares at Sep. 30, 2019		40	12,200,000
Balance - Value at Jun. 30, 2019	321,935,385	$ 1,038	$ 321,934,347
Balance - Shares at Jun. 30, 2019		40	12,400,000
Purchases of Shares - Value	85,188,789		$ 85,188,789
Purchases of Shares - Shares			3,200,000
Redemption of Shares - Value	(90,311,144)		$ (90,311,144)
Redemption of Shares - Shares			(3,400,000)
Net Increase (Decrease) due to Share Transactions, value	(5,122,355)		$ (5,122,355)
Net Increase (Decrease) due to Share Transactions, shares			(200,000)
Net Income (Loss)
Net Investment Income (Loss)	1,168,953	$ 5	$ 1,168,948
Net Realized Gain (Loss) on United States Treasury Obligations, Affiliated Investments and Currency Futures Contracts	6,751,594	22	6,751,572
Net Change in Unrealized Gain (Loss) on United States Treasury Obligations, Affiliated Investments and Currency Futures Contracts	5,730,491	19	5,730,472
Net Income (Loss)	13,651,038	46	13,650,992
Net Change in Shareholders' Equity, value	8,528,683	46	$ 8,528,637
Net Change in Shareholders' Equity, shares			(200,000)
Balance - Value at Sep. 30, 2019	330,464,068	$ 1,084	$ 330,462,984
Balance - Shares at Sep. 30, 2019		40	12,200,000
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