XML 43 R28.htm IDEA: XBRL DOCUMENT
v3.22.4

FEES PAID BY THE FUND AND RELATED PARTY TRANSACTIONS (Details) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
FEES PAID BY THE FUND AND RELATED PARTY TRANSACTIONS |  |  |
Percentage of management fee in average daily total net assets | 0.60% |  |
Registration fees | $ 92,130 | $ 151,475 | $ 124,835
Estimated directors' fees and expenses | 46,961 | 46,172 | 17,435
Licensing fee incurred | 18,975 | 26,868 | 27,019
USL and the other Related Public Funds |  |  |
FEES PAID BY THE FUND AND RELATED PARTY TRANSACTIONS |  |  |
Estimated directors' fees and expenses | $ 46,961 | 1,081,963 | 585,896
On and after October 20, 2011 |  |  |
FEES PAID BY THE FUND AND RELATED PARTY TRANSACTIONS |  |  |
Fee percentage | 0.015% |  |
USL's |  |  |
FEES PAID BY THE FUND AND RELATED PARTY TRANSACTIONS |  |  |
Estimated directors' fees and expenses | $ 1,258,000 | 46,172 | 17,435
Investor tax reporting cost | $ 140,802 |  |
Investor reporting costs |  | $ 269,327 | $ 172,801

X
- Definition Amount of registration fee expense for issuance of shares or units. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 220 -Section 45 -Paragraph 3 -Subparagraph (m) -URI https://asc.fasb.org/extlink&oid=124433917&loc=SL114874205-224268 + Details
Name: | us-gaap_InvestmentCompanyRegistrationExpense
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Noninterest expense related to directors' fees which are fees paid by an Entity to its directors. Directors' fees may be paid in addition to salary and other benefits. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.14) -URI https://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260 + Details
Name: | us-gaap_NoninterestExpenseDirectorsFees
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of general expenses not normally included in Other Operating Costs and Expenses. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.6) -URI https://asc.fasb.org/extlink&oid=126953954&loc=SL114868664-224227 + Details
Name: | us-gaap_OtherGeneralExpense
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Percentage of base fee. + References No definition available. + Details
Name: | usl_BaseFeePercentage
Namespace Prefix: | usl_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Fees Paid and Related Party Transactions [Line Items] + References No definition available. + Details
Name: | usl_FeesPaidAndRelatedPartyTransactionsLineItems
Namespace Prefix: | usl_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents investor reporting costs. + References No definition available. + Details
Name: | usl_InvestorReportingCosts
Namespace Prefix: | usl_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition It represent the value of license fees and other offering expenses. + References No definition available. + Details
Name: | usl_LicenseFeesAndOtherOfferingExpenses
Namespace Prefix: | usl_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Percentage of Management Fee In Average Daily Total Net Assets. + References No definition available. + Details
Name: | usl_PercentageOfManagementFeeInAverageDailyTotalNetAssets
Namespace Prefix: | usl_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_InvestmentTypeAxis=usl_FundTrustsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InvestmentTypeAxis=usl_GroupThreeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InvestmentTypeAxis=usl_UnitedStatesTwelveMonthOilFundLimitedPartnershipMemberMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |