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CONTRACTS AND AGREEMENTS (Details)		9 Months Ended
	Oct. 01, 2022	Sep. 30, 2025 USD ($) $ / item	Sep. 30, 2024 USD ($)
Minimum
CONTRACTS AND AGREEMENTS
Flat fee		0.20%
Maximum
CONTRACTS AND AGREEMENTS
Flat fee		0.30%
Future contracts
CONTRACTS AND AGREEMENTS
Monthly average volume | $		$ 763,667,431	$ 1,046,433,502
Marketing Agreement | USO
CONTRACTS AND AGREEMENTS
Percentage of total net asset	0.025%
Marketing Agreement | USO | Maximum
CONTRACTS AND AGREEMENTS
Ratio of expense to average net assets		10.00%
Brokerage and Futures Commission Merchant Agreements | Minimum
CONTRACTS AND AGREEMENTS
Commissions per round-turn trade, including applicable exchange and NFA fees for oil futures contracts and options on oil futures contracts		7
Brokerage and Futures Commission Merchant Agreements | Maximum
CONTRACTS AND AGREEMENTS
Commissions per round-turn trade, including applicable exchange and NFA fees for oil futures contracts and options on oil futures contracts		8

X

- Definition

Nominal or face amount used to calculate payment on derivative.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 181
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480401/815-10-55-181

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1B
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480434/815-10-50-1B

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1A
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480434/815-10-50-1A

+ Details

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Balance Type:	na
Period Type:	instant

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef
-Topic 944
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 15
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479808/944-20-55-15

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X

- Definition

Represents the commissions per round-turn trade, including applicable exchange and NFA fees for oil futures contracts and options on oil futures contracts.

+ References

No definition available.

+ Details

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Namespace Prefix:	uso_
Data Type:	srt-types:perUnitItemType
Balance Type:	na
Period Type:	duration

X

- Definition

It represents the flat fees percentage.

+ References

No definition available.

+ Details

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Namespace Prefix:	uso_
Data Type:	dtr-types:percentItemType
Balance Type:	na
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X

- Definition

Represents the total net asset percentage.

+ References

No definition available.

+ Details

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Namespace Prefix:	uso_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Ratio Of Expenses To Average Net Assets

+ References

No definition available.

+ Details

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Namespace Prefix:	uso_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

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- Details

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- Details

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X

- Details

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X

- Details

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X

- Details

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