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CONTRACTS AND AGREEMENTS - Brokerage and Futures Commissions Merchant Agreements (Details) - USD ($)	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
CONTRACTS AND AGREEMENTS
Total commissions accrued to brokers	$ 8,179	$ 5,945	$ 8,670
Total commissions as annualized percentage of average total net assets	0.05%	0.03%	0.02%

X

- Definition

The percentage of average daily net assets.

+ References

No definition available.

+ Details

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Namespace Prefix:	unl_
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Balance Type:	na
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X

- References

No definition available.

+ Details

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X

- Definition

The amount of expense during the period for floor brokerage fees paid to other broker-dealers to execute trades on their behalf, stock exchange fees, order flow fees, and clearance fees.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 940
-SubTopic 320
-Name Accounting Standards Codification
-Section 45
-Paragraph 6
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479035/940-320-45-6

+ Details

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