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FEES PAID BY THE FUND AND RELATED PARTY TRANSACTIONS (Details)	3 Months Ended		12 Months Ended
	Mar. 31, 2021 USD ($)	Mar. 31, 2020 USD ($)	Dec. 31, 2021 USD ($)
Fees Paid and Related Party Transactions [Line Items]
Licensing fee incurred	$ 13,024	$ 17,204
Estimated investor tax reporting cost			$ 750,000
Estimated directors fees and expenses	$ 18,891	24,503	0
USNG and the Related Public Funds [Member]
Fees Paid and Related Party Transactions [Line Items]
Estimated directors fees and expenses			$ 0
UNITED STATES GAS FUND LP [Member]
Fees Paid and Related Party Transactions [Line Items]
Monthly fee obligated to pay on average daily total net assets, maximum base fee 1,000,000,000 (as a percentage)	0.60
Average daily total net assets	$ 1,000,000,000
Monthly fee obligated to pay on average daily total net assets (as a percentage)	0.50
Licensing Agreements [Member]
Fees Paid and Related Party Transactions [Line Items]
Fee percentage	0.015%
United States Oil Fund LP [Member]
Fees Paid and Related Party Transactions [Line Items]
Ongoing Registration Fees and Other Offering Expenses	$ 81,000	$ 68,250

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- Definition

Amount of daily average total net assets outstanding.

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Percentage of fee obligated to pay by UNG that are greater than average daily total net assets.

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Percentage of fee obligated to pay by UNG on maximum average daily total net assets.

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Base Fee Percentage

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Fees Paid and Related Party Transactions [Line Items]

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Its represents the value of license fees and other offering expenses.

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Registration Fees And Other Offering Expenses

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- Definition

Noninterest expense related to directors' fees which are fees paid by an Entity to its directors. Directors' fees may be paid in addition to salary and other benefits.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 220
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-04.14)
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Amount of general expenses not normally included in Other Operating Costs and Expenses.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
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