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Capital Units, Issued

No definition available.

Name:	ung_CapitalUnitsIssued
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Nine character alphanumeric identifier of an entity or issuer and the type of security.

No definition available.

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The amount of fee paid per order.

No definition available.

Name:	ung_FeePaidPerOrder
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Data Type:	xbrli:monetaryItemType
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Per unit of net asset value.

No definition available.

Name:	ung_NetAssetValuePerUnit
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Number of units per Basket.

No definition available.

Name:	ung_NumberOfUnitsPerBasket
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Number of initially registered shares.

No definition available.

Name:	ung_NumberOfUnitsRegisteredInPeriod
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Organization, Consolidation and Presentation of Financial Statements Disclosure

No definition available.

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Number of shares issued during the period.

No definition available.

Name:	ung_UnitsIssuedDuringPeriodUnitsNewIssues
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Amount received from the issuance of new shares during the period.

No definition available.

Name:	ung_UnitsIssuedDuringPeriodValueNewIssues
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Number of capital units or capital shares outstanding. This element is relevant to issuers of face-amount certificates and registered investment companies.

No definition available.

Name:	us-gaap_CapitalUnitsOutstanding
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Balance held at close of period in number of contracts.

No definition available.

Name:	us-gaap_InvestmentOwnedBalanceContracts
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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.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 4
-Subparagraph (SAB Topic 4.C)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480008/505-10-S99-4

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