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Condensed Statements of Cash Flows - USD ($)		3 Months Ended
		Mar. 31, 2023	Mar. 31, 2022
Cash Flows from Operating Activities:
Net income (loss)		$ (69,659,449)	$ 818,899,602
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Change in unrealized (gain) loss on open commodity futures contracts		36,340,617	(154,902,602)
Change in unrealized (gain) loss on open swap contracts		(2,194)	1,287
(Increase) decrease in dividends receivable		3,156,834	(204,769)
(Increase) decrease in interest receivable		(1,816,387)	(17,438)
(Increase) decrease in prepaid insurance	[1]	(355,089)	(477,968)
Increase (decrease) payable due to custody		(1,012,851)
Increase (decrease) in payable due to Broker		3,309,888	141,241,750
Increase (decrease) in General Partner management fees payable		(254,263)	370,944
Increase (decrease) in professional fees payable		(1,049,376)	(300,897)
Increase (decrease) in brokerage commissions payable		2,151	(40,775)
Increase (decrease) in directors'fees payable	[1]	(8,333)	718
Increase (decrease) in license fees payable		(19,534)	7,310
Net cash provided by (used in) operating activities		(31,367,986)	804,577,162
Cash Flows from Financing Activities:
Addition of partnership shares		861,028,987	1,114,835,644
Redemption of partnership shares		(1,138,183,917)	(1,025,052,549)
Net cash provided by (used in) financing activities		(277,154,930)	89,783,095
Net Increase (Decrease) in Cash and Cash Equivalents		(308,522,916)	894,360,257
Total Cash, Cash Equivalents and Equity in Trading Accounts, beginning of period		1,953,896,501	2,264,418,396
Total Cash, Cash Equivalents and Equity in Trading Accounts, end of period		1,645,373,585	3,158,778,653
Components of Cash, Cash Equivalents, and Equity in Trading Accounts
Cash and cash equivalents		563,367,949	2,274,171,075
Equity in Trading Accounts:
Cash and cash equivalents		1,082,005,636	884,607,578
Total Cash, Cash Equivalents and Equity in Trading Accounts		$ 1,645,373,585	$ 3,158,778,653
[1] Certain prior year amounts have been reclassified for consistency with the current presentation.

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Name:	uso_CashAndCashEquivalentsAtCarryingValueInEquityInTradingAccounts
Namespace Prefix:	uso_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Amount of change in unrealized gain (loss) on open swap contracts.

+ References

No definition available.

+ Details

Name:	uso_ChangeInUnrealizedGainLossOnOpenSwapContracts
Namespace Prefix:	uso_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- References

No definition available.

+ Details

Name:	uso_EquityInTradingAccountsAbstract
Namespace Prefix:	uso_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The amount of information pertaining to increase (decrease) in directors fees payable of an entity during the period.

+ References

No definition available.

+ Details

Name:	uso_IncreaseDecreaseInDirectorsFeesPayable
Namespace Prefix:	uso_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Increase (Decrease) in License Fees Payable

+ References

No definition available.

+ Details

Name:	uso_IncreaseDecreaseInLicenseFeesPayable
Namespace Prefix:	uso_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

The change during the period, either increase or decrease, in amounts payable due to custody.

+ References

No definition available.

+ Details

Name:	uso_IncreaseDecreaseInPayableDueToCustody
Namespace Prefix:	uso_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

The change during the period, either increase or decrease, in amounts payable due to broker.

+ References

No definition available.

+ Details

Name:	uso_IncreaseDecreaseInPayablesDueToCustomers
Namespace Prefix:	uso_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Increase decrease in prepaid insurance

+ References

No definition available.

+ Details

Name:	uso_IncreaseDecreaseInPrepaidInsurances
Namespace Prefix:	uso_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Increase (Decrease) In Professional Fees Payable

+ References

No definition available.

+ Details

Name:	uso_IncreaseDecreaseInProfessionalFeesPayable
Namespace Prefix:	uso_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Net change in management fee payable.

+ References

No definition available.

+ Details

Name:	uso_IncreaseDecreaseManagementFeesPayable
Namespace Prefix:	uso_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Payments To Partnership Redemption.

+ References

No definition available.

+ Details

Name:	uso_PaymentsToPartnershipRedemption
Namespace Prefix:	uso_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration