Statements of Changes in Net Assets (Unaudited) - USD ($)	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Net Assets, Beginning of Period	$ 6,540,758,565	$ 4,904,036,623
Operations:
Net investment loss	(7,676,949)	(5,951,914)
Net realized loss	(9,570,709)	(43,054,318)
Net change in unrealized appreciation/depreciation	(1,423,211,664)	(69,197,383)
Net decrease in net assets resulting from operations	(1,440,459,322)	(118,203,615)
Capital Share Transactions:
Contributions for Shares issued	889,817,438	185,279,712
Distributions for Shares redeemed	(484,999,588)	(302,681,083)
Net increase (decrease) in net assets from capital share transactions	404,817,850	(117,401,371)
Decrease in net assets	(1,035,641,472)	(235,604,986)
Net Assets, End of Period	$ 5,505,117,093	$ 4,668,431,637
Shares issued and redeemed
Shares issued (in shares)	66,150,000	12,650,000
Shares redeemed (in shares)	(30,550,000)	(20,700,000)
Net increase (decrease) in Shares issued and outstanding (in shares)	35,600,000	(8,050,000)