Statements Of Financial Condition (Parenthetical) - USD ($)	Jun. 30, 2020	Dec. 31, 2019
Statements Of Financial Condition [Abstract]
Investments in U.S. Treasury notes, amortized cost	$ 9,986,733	$ 19,948,217
Cash denominated in foreign currencies, cost	4,316,434	7,806,800
INVESTMENTS IN U.S. TREASURY NOTES, amortized cost	$ 101,987,887	$ 113,491,358

Cost basis of cash denominated in foreign currencies and due from carrying brokers, translated to US Dollars at the exchange rate prevailing when such transactions occurred.

No definition available.

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Namespace Prefix:	millnestor_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant