Statements Of Financial Condition (Parenthetical) - USD ($)	Mar. 31, 2020	Dec. 31, 2019
Statements Of Financial Condition [Abstract]
Investments in U.S. Treasury notes, amortized cost	$ 9,186,889	$ 19,948,217
Cash denominated in foreign currencies, cost	3,664,754	7,806,800
INVESTMENTS IN U.S. TREASURY NOTES, amortized cost	$ 101,043,641	$ 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.

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