XML 20 R5.htm IDEA: XBRL DOCUMENT
v3.24.2.u1

Condensed Schedule of Investments (Unaudited) (Parenthetical) - USD ($) | Jun. 30, 2024 | Dec. 31, 2023
--- | --- | ---
Collateral amount on open future contracts | $ 20,284,866 | $ 45,391,063
United States Money Market Funds | Cash Equivalents | Morgan Stanley Institutional Liquidity Funds - Government Portfolio - Institutional Shares |  |
Interest rate | 5.22% | 5.27%

X
- Definition Contractual interest rate for funds borrowed, under the debt agreement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)(a)(1)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1B + Details
Name: | us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition The collateral amount on open future contracts. + References No definition available. + Details
Name: | usl_CollateralAmountOnOpenFuturesContracts
Namespace Prefix: | usl_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | usl_InvestmentSecondaryCategorization1Axis=us-gaap_MoneyMarketFundsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CashAndCashEquivalentsAxis=us-gaap_CashEquivalentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=usl_MorganStanleyInstitutionalLiquidityFundsGovernmentPortfolioMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |