XML 45 R27.htm IDEA: XBRL DOCUMENT v3.24.0.1

FEES PAID BY THE FUND AND RELATED PARTY TRANSACTIONS (Details) - USD ($)	12 Months Ended
	Dec. 31, 2023	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	$ 0	$ 92,130	$ 151,475
Estimated directors' fees and expenses	36,584	46,961	46,172
Licensing fee incurred	11,497	18,975	26,868
USL and other Related Public Funds
FEES PAID BY THE FUND AND RELATED PARTY TRANSACTIONS
Estimated directors' fees and expenses	$ 36,584	1,258,000	1,081,963
Licensing Fees
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	$ 1,210,000	46,961		$ 46,172
Investor tax reporting cost	$ 66,664
Investor reporting costs		$ 140,802	$ 269,372

X

- Definition

Amount of registration fee expense for issuance of shares or units.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 946
-SubTopic 220
-Name Accounting Standards Codification
-Section 45
-Paragraph 3
-Subparagraph (m)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483581/946-220-45-3

+ 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
-Topic 942
-SubTopic 220
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-04.14)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483589/942-220-S99-1

+ 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
-Topic 220
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.6)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483621/220-10-S99-2

+ 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: