XML 38 R24.htm IDEA: XBRL DOCUMENT
v3.22.1

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) | Mar. 31, 2022 USD ($) $ / item
--- | ---
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES |
Unrecognized tax benefits accrued for interest and penalties | $ | $ 0
Fee paid by Authorized Purchasers for each order placed to create one or more Creation Baskets or to redeem one or more baskets | 350
Redemption Baskets [Member] |
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES |
Number of units per basket | 50,000

X
- Definition Fee Paid Per Order + References No definition available. + Details
Name: | unl_FeePaidPerOrder
Namespace Prefix: | unl_
Data Type: | srt-types:perUnitItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of Units per Basket + References No definition available. + Details
Name: | unl_NumberOfUnitsPerBasket
Namespace Prefix: | unl_
Data Type: | srt-types:perUnitItemType
Balance Type: | na
Period Type: | instant

X
- Definition Significant Accounting Policies [Line Items] + References No definition available. + Details
Name: | unl_SignificantAccountingPoliciesLineItems
Namespace Prefix: | unl_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount accrued for interest on an underpayment of income taxes and penalties related to a tax position claimed or expected to be claimed in the tax return. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=121826272&loc=d3e32718-109319 + Details
Name: | us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=unl_RedemptionBasketsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |