Statements of Financial Condition (Unaudited) (Parenthetical) - USD ($)	Sep. 30, 2020	Dec. 31, 2019
Investments in Securities, Cost	$ 740,835,906	$ 229,340,530
Affiliated Investments [Member]
Affiliated Investments, at Cost	620,857,927	105,742,951
US Treasury Bill Securities [Member]
Investments in Securities, Cost	$ 119,977,979	$ 123,597,579