XML 43 R28.htm IDEA: XBRL DOCUMENT
v3.21.2

CONTRACTS AND AGREEMENTS - Additional Information (Details) $ in Billions | 9 Months Ended
--- | ---
Sep. 30, 2021 USD ($) $ / item
Maximum [Member] |
CONTRACTS AND AGREEMENTS |
Commissions per round-turn trade, including applicable exchange and NFA fees for Natural Gas-Related Futures Contracts and options on Futures Contracts | $ / item | 8
Minimum [Member] |
CONTRACTS AND AGREEMENTS |
Commissions per round-turn trade, including applicable exchange and NFA fees for Natural Gas-Related Futures Contracts and options on Futures Contracts | $ / item | 7
Marketing Agent And Affiliate Of USCF [Member] |
CONTRACTS AND AGREEMENTS |
Maximum Aggregate Compensation Paid For Distribution Related Services | 10.00%
Marketing Agreement [Member] | UNL's assets up to $3 billion [Member] |
CONTRACTS AND AGREEMENTS |
Fee percentage | 0.06%
Base amount for determining fee percentage | $ | $ 3
Marketing Agreement [Member] | UNL's assets in excess of $3 billion [Member] |
CONTRACTS AND AGREEMENTS |
Fee percentage | 0.04%
Base amount for determining fee percentage | $ | $ 3

X
- Definition Base Fee Percentage + References No definition available. + Details
Name: | unl_BaseFeePercentage
Namespace Prefix: | unl_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Basis Amount for Fee Percentage + References No definition available. + Details
Name: | unl_BasisAmountForFeePercentage
Namespace Prefix: | unl_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Commissions Paid + References No definition available. + Details
Name: | unl_CommissionsPaid
Namespace Prefix: | unl_
Data Type: | srt-types:perUnitItemType
Balance Type: | na
Period Type: | duration

X
- Definition Maximum percentage of gross proceeds from offering paid for distribution related services as compensation. + References No definition available. + Details
Name: | unl_MaximumAggregateCompensationPaidForDistributionRelatedServices
Namespace Prefix: | unl_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_LongDurationContractsAssumptionsByProductAndGuaranteeLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

X
- Details
Name: | us-gaap_TypeOfArrangementAxis=unl_MarketingAgreementMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

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