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FEES PAID BY THE FUND AND RELATED PARTY TRANSACTIONS (Details)	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2020 USD ($)	Jun. 30, 2019 USD ($)	Jun. 30, 2020 USD ($)	Jun. 30, 2019 USD ($)	Dec. 31, 2020 USD ($)
Fees Paid and Related Party Transactions [Line Items]
Licensing fee incurred	$ 14,531	$ 10,307	$ 31,735	$ 21,130
Estimated directors fees and expenses	19,695	$ 13,382	$ 44,198	30,583
Scenario, Forecast [Member]
Fees Paid and Related Party Transactions [Line Items]
Estimated investor tax reporting cost					$ 760,000
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					$ 64,000
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			$ 180,000	$ 40,819

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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
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-Name Accounting Standards Codification
-Topic 942
-SubTopic 220
-Section S99
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