Condensed Statements of Financial Condition (Parenthetical) - shares	Mar. 31, 2020	Dec. 31, 2019
Statement of Financial Position [Abstract]
General Partner: units issued (in units)	100,000	100,000
General Partner: units outstanding (in units)	100,000	100,000
Limited partners: units issued (in units)	97,693,215	98,092,098
Limited partners: units outstanding (in units)	97,693,215	98,092,098