XML 42 R27.htm IDEA: XBRL DOCUMENT
v3.24.1.u1

CONTRACTS AND AGREEMENTS (Details) |  |  | 3 Months Ended |
--- | --- | --- | --- | ---
Oct. 01, 2022 | Sep. 30, 2022 USD ($) | Mar. 31, 2024 USD ($) $ / item | Mar. 31, 2023 USD ($)
Futures Contracts |  |  |  |
CONTRACTS AND AGREEMENTS |  |  |  |
Derivative notional amount |  |  | $ 724,968,196 | $ 848,637,568
Minimum |  |  |  |
CONTRACTS AND AGREEMENTS |  |  |  |
Commissions per round-turn trade, including applicable exchange and NFA fees for Futures Contracts and options on Futures Contracts | $ / item |  |  | 7 |
Percentage of flat fee |  |  | 0.20% |
Maximum |  |  |  |
CONTRACTS AND AGREEMENTS |  |  |  |
Commissions per round-turn trade, including applicable exchange and NFA fees for Futures Contracts and options on Futures Contracts | $ / item |  |  | 8 |
Percentage of flat fee |  |  | 0.30% |
USNG's assets up to $3 billion | Marketing Agreement |  |  |  |
CONTRACTS AND AGREEMENTS |  |  |  |
Fee percentage |  | 0.06% |  |
Base amount for determining fee percentage |  | $ 3,000,000,000 |  |
USNG's assets in excess of $3 billion | Marketing Agreement |  |  |  |
CONTRACTS AND AGREEMENTS |  |  |  |
Fee percentage |  |  | 10.00% |
Percentage of total net assets | 0.025% |  |  |
USNG's assets in excess of $3 billion | Marketing Agreement | Minimum |  |  |  |
CONTRACTS AND AGREEMENTS |  |  |  |
Fee percentage |  | 0.04% |  |
Base amount for determining fee percentage |  | $ 3,000,000,000 |  |

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

X
- Definition Amount of base fee. + References No definition available. + Details
Name: | ung_BasisAmountForFeePercentage
Namespace Prefix: | ung_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of commissions paid. + References No definition available. + Details
Name: | ung_CommissionsPaid
Namespace Prefix: | ung_
Data Type: | srt-types:perUnitItemType
Balance Type: | na
Period Type: | duration

X
- Definition Line items represents the information pertaining to contracts and agreements. + References No definition available. + Details
Name: | ung_ContractsAndAgreementsLineItems
Namespace Prefix: | ung_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage of flat fees paid. + References No definition available. + Details
Name: | ung_FlatFeesPaid
Namespace Prefix: | ung_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Percentage of total net assets. + References No definition available. + Details
Name: | ung_PercentageOfTotalNetAssets
Namespace Prefix: | ung_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Nominal or face amount used to calculate payment on derivative. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 815 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Publisher FASB -URI https://asc.fasb.org//1943274/2147480434/815-10-50-1B Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 815 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1A -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480434/815-10-50-1A + Details
Name: | us-gaap_DerivativeNotionalAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | instant

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

X
- Details
Name: | srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=ung_GroupThreeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

X
- Details
Name: | srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=ung_GroupFourMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |