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	15,332,463		$ 15,332,463
Purchases of Shares - Shares			600,000
Redemption of Shares - Value	(142,646,184)		$ (142,646,184)
Redemption of Shares - Shares			(5,600,000)
Net Increase (Decrease) due to Share Transactions, value	(127,313,721)		$ (127,313,721)
Net Increase (Decrease) due to Share Transactions, shares			(5,000,000)
Net Income (Loss)
Net Investment Income (Loss)	1,587,122	$ 5	$ 1,587,117
Net Realized Gain (Loss) on United States Treasury Obligations, Affiliated Investments and Currency Futures Contracts	(952,043)	(3)	(952,040)
Net Change in Unrealized Gain (Loss) on United States Treasury Obligations, Affiliated Investments and Currency Futures Contracts	7,091,006	20	7,090,986
Net Income (Loss)	7,726,085	22	7,726,063
Net Change in Shareholders' Equity, value	(119,587,636)	22	$ (119,587,658)
Net Change in Shareholders' Equity, shares			(5,000,000)
Balance - Value at Mar. 31, 2019	374,764,956	$ 1,041	$ 374,763,915
Balance - Shares at Mar. 31, 2019		40	14,400,000
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	891,069,735		$ 891,069,735
Purchases of Shares - Shares			32,800,000
Redemption of Shares - Value	(141,817,950)		$ (141,817,950)
Redemption of Shares - Shares			(5,200,000)
Net Increase (Decrease) due to Share Transactions, value	749,251,785		$ 749,251,785
Net Increase (Decrease) due to Share Transactions, shares			27,600,000
Net Income (Loss)
Net Investment Income (Loss)	627,963	$ (25)	$ 627,988
Net Realized Gain (Loss) on United States Treasury Obligations, Affiliated Investments and Currency Futures Contracts	3,647,504	(142)	3,647,646
Net Change in Unrealized Gain (Loss) on United States Treasury Obligations, Affiliated Investments and Currency Futures Contracts	(5,172,795)	202	(5,172,997)
Net Income (Loss)	(897,328)	35	(897,363)
Net Change in Shareholders' Equity, value	748,354,457	35	$ 748,354,422
Net Change in Shareholders' Equity, shares			27,600,000
Balance - Value at Mar. 31, 2020	$ 976,671,674	$ 1,073	$ 976,670,601
Balance - Shares at Mar. 31, 2020		40	36,400,000