XML 36 R22.htm IDEA: XBRL DOCUMENT
v3.22.2

ORGANIZATION AND BUSINESS (Details) |  |  | 1 Months Ended | 6 Months Ended |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Jan. 04, 2018 $ / shares shares | Jan. 04, 2018 $ / shares shares | Apr. 18, 2007 USD ($) $ / shares shares | Apr. 30, 2007 | Jun. 30, 2022 contract $ / shares $ / item | Mar. 31, 2022 $ / shares | Dec. 31, 2021 $ / shares | Jun. 30, 2021 $ / shares | Mar. 31, 2021 $ / shares | Dec. 31, 2020 $ / shares
Organization, Consolidation and Presentation of Financial Statements Disclosure |  |  |  |  |  |  |  |  |  |
Number of successive valuation days |  |  |  |  | 30 days |  |  |  |  |
Average daily percentage change in the price of the Benchmark Futures Contract considered |  |  |  |  | 10.00% |  |  |  |  |
Fee paid by Authorized Purchasers for each order placed to create one or more Creation Baskets or to redeem one or more baskets | $ / item |  |  |  |  | 1,000 |  |  |  |  |
Number of initially registered units on Form S-1 with the U.S. Securities and Exchange Commission |  |  |  | 30,000,000 |  |  |  |  |  |
Net Asset Value Per Unit | $ / shares |  |  |  |  | $ 18.45 | $ 19.69 | $ 12.39 | $ 12.75 | $ 9.61 | $ 9.20
Number of units issued |  |  | 200,000 |  |  |  |  |  |  |
Value of unit issued | $ |  |  | $ 10,001,000 |  |  |  |  |  |  |
Number of registered units |  |  |  |  | 2,280,000,000 |  |  |  |  |
Committee For Uniform Securities Identification Procedure Cusip | 912318300 |  |  |  |  |  |  |  |  |
Stockholders' Equity, Reverse Stock Split |  | 0.25 |  |  |  |  |  |  |  |
Prior to Reverse Split |  |  |  |  |  |  |  |  |  |
Organization, Consolidation and Presentation of Financial Statements Disclosure |  |  |  |  |  |  |  |  |  |
Net Asset Value Per Unit | $ / shares | $ 5.69 | $ 5.69 | $ 50.00 |  |  |  |  |  |  |
Issued units | 97,466,476 | 97,466,476 |  |  |  |  |  |  |  |
Capital Units, Outstanding | 97,466,476 | 97,466,476 |  |  |  |  |  |  |  |
Stockholders' Equity, Reverse Stock Split |  | 0.25 |  |  |  |  |  |  |  |
Following Reverse Split |  |  |  |  |  |  |  |  |  |
Organization, Consolidation and Presentation of Financial Statements Disclosure |  |  |  |  |  |  |  |  |  |
Net Asset Value Per Unit | $ / shares | $ 22.76 | $ 22.76 |  |  |  |  |  |  |  |
Issued units | 24,366,619 | 24,366,619 |  |  |  |  |  |  |  |
Capital Units, Outstanding | 24,366,619 | 24,366,619 |  |  |  |  |  |  |  |
Creation Baskets |  |  |  |  |  |  |  |  |  |
Organization, Consolidation and Presentation of Financial Statements Disclosure |  |  |  |  |  |  |  |  |  |
Number of units per basket | $ / item |  |  |  |  | 100,000 |  |  |  |  |
Redemption Baskets |  |  |  |  |  |  |  |  |  |
Organization, Consolidation and Presentation of Financial Statements Disclosure |  |  |  |  |  |  |  |  |  |
Number of units per basket | $ / item |  |  |  |  | 100,000 |  |  |  |  |
Open Commodity Futures Contracts, Long | United States | NYMEX Natural Gas Futures Contracts |  |  |  |  |  |  |  |  |  |
Organization, Consolidation and Presentation of Financial Statements Disclosure |  |  |  |  |  |  |  |  |  |
Number of Contracts | contract |  |  |  |  | 7,647 |  |  |  |  |

X
- Definition Average daily percentage change in the price of the Benchmark Futures Contract considered for determining the average daily percentage change in the fund's NAV for achieving the entity's investment objective. + References No definition available. + Details
Name: | ung_AverageDailyPercentageChangeInPriceOfBenchmarkFuturesContractConsidered
Namespace Prefix: | ung_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Capital Units, Issued + References No definition available. + Details
Name: | ung_CapitalUnitsIssued
Namespace Prefix: | ung_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Nine character alphanumeric identifier of an entity or issuer and the type of security. + References No definition available. + Details
Name: | ung_CommitteeForUniformSecuritiesIdentificationProcedureCusip
Namespace Prefix: | ung_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Fee Paid Per Order + References No definition available. + Details
Name: | ung_FeePaidPerOrder
Namespace Prefix: | ung_
Data Type: | srt-types:perUnitItemType
Balance Type: | na
Period Type: | instant

X
- Definition Net asset value per unit. + References No definition available. + Details
Name: | ung_NetAssetValuePerUnit
Namespace Prefix: | ung_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of Registered Units + References No definition available. + Details
Name: | ung_NumberOfRegisteredUnits
Namespace Prefix: | ung_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of successive valuation days over which the average daily percentage change in the fund's NAV will be considered for achieving the entity's investment objective, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
Name: | ung_NumberOfSuccessiveValuationDays
Namespace Prefix: | ung_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of unit per basket. + References No definition available. + Details
Name: | ung_NumberOfUnitPerBasket
Namespace Prefix: | ung_
Data Type: | srt-types:perUnitItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of Units Registered in Period + References No definition available. + Details
Name: | ung_NumberOfUnitsRegisteredInPeriod
Namespace Prefix: | ung_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items] + References No definition available. + Details
Name: | ung_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureLineItems
Namespace Prefix: | ung_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Units Issued During Period, Units, New Issues + References No definition available. + Details
Name: | ung_UnitsIssuedDuringPeriodUnitsNewIssues
Namespace Prefix: | ung_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Units Issued During Period, Value, New Issues + References No definition available. + Details
Name: | ung_UnitsIssuedDuringPeriodValueNewIssues
Namespace Prefix: | ung_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Number of capital units or capital shares outstanding. This element is relevant to issuers of face-amount certificates and registered investment companies. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.6-04.16(a)) -URI https://asc.fasb.org/extlink&oid=120401414&loc=d3e603758-122996 + Details
Name: | us-gaap_CapitalUnitsOutstanding
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Balance held at close of period in number of contracts. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 320 -Section S99 -Paragraph 6 -Subparagraph (SX 210.12-14.Column B) -URI https://asc.fasb.org/extlink&oid=122147990&loc=d3e611322-123010 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 320 -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-12B(Column B)) -URI https://asc.fasb.org/extlink&oid=122147990&loc=d3e611197-123010 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 320 -Section S99 -Paragraph 1 -Subparagraph (SX 210.12-12.Column B) -URI https://asc.fasb.org/extlink&oid=122147990&loc=d3e611133-123010 + Details
Name: | us-gaap_InvestmentOwnedBalanceContracts
Namespace Prefix: | us-gaap_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | instant

X
- Definition Description of the reverse stock split arrangement. Also provide the retroactive effect given by the reverse split that occurs after the balance sheet date but before the release of financial statements. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SAB Topic 4.C) -URI https://asc.fasb.org/extlink&oid=120397183&loc=d3e187143-122770 + Details
Name: | us-gaap_StockholdersEquityReverseStockSplit
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_ConversionOfStockByUniqueDescriptionAxis=ung_PriorToReverseSplitMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ConversionOfStockByUniqueDescriptionAxis=ung_FollowingReverseSplitMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

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

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

X
- Details
Name: | srt_StatementGeographicalAxis=country_US
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=ung_NYMEXNaturalGasFuturesContractsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |