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FEES PAID BY THE FUND AND RELATED PARTY TRANSACTIONS (Details)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2020 USD ($)	Sep. 30, 2019 USD ($)	Sep. 30, 2020 USD ($)	Sep. 30, 2019 USD ($)	Dec. 31, 2020 USD ($)
Fees Paid and Related Party Transactions [Line Items]
Licensing fee incurred	$ 13,789	$ 11,487	$ 45,524	$ 32,617
Estimated directors fees and expenses	19,075	$ 18,785	$ 63,273	49,368
Scenario, Forecast [Member]
Fees Paid and Related Party Transactions [Line Items]
Estimated investor tax reporting cost					$ 700,000
USNG and the Related Public Funds [Member] | Scenario, Forecast [Member]
Fees Paid and Related Party Transactions [Line Items]
Estimated directors fees and expenses					574,000
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		$ 1,000,000,000
Monthly fee obligated to pay on average daily total net assets (as a percentage)			0.50
UNITED STATES GAS FUND LP [Member] | Scenario, Forecast [Member]
Fees Paid and Related Party Transactions [Line Items]
Estimated directors fees and expenses					$ 80,000
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			$ 281,400	$ 75,440

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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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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 220
-Section S99
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