XML 43 R28.htm IDEA: XBRL DOCUMENT
v3.25.1

CONTRACTS AND AGREEMENTS (Details) - $ / item |  | 3 Months Ended
--- | --- | ---
Oct. 01, 2022 | Mar. 31, 2025
Minimum |  |
CONTRACTS AND AGREEMENTS |  |
Commissions per round-turn trade, including applicable exchange and NFA fees for Futures Contracts and options on Futures Contracts |  | 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 |  | 8
Percentage of flat fee |  | 0.30%
USNG's assets in excess of $3 billion | Marketing Agreement |  |
CONTRACTS AND AGREEMENTS |  |
Fee percentage |  | 10.00%
Percentage of total net assets | 0.025% |

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 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
- 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_GroupFourMember
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: |