XML 21 R5.htm IDEA: XBRL DOCUMENT v3.22.0.1

Schedule of Investments (Parenthetical) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Expiration date	December 31, 2021	December 31, 2020
Collateral Amount On Open Futures Contracts	$ 699,318,107	$ 723,771,439
Investment, Period of Yield	7 days	7 days
Fidelity Investments Money Market Funds - Government Portfolio, 0.01% | United States Money Market Funds | Cash Equivalents
Interest rate		0.01%
Goldman Sachs Financial Square Government Fund - Institutional Shares, 0.03%# | United States Money Market Funds | Cash Equivalents
Interest rate	0.03%
Morgan Stanley Institutional Liquidity Funds - Government Portfolio - Institutional Shares, 0.03%# | United States Money Market Funds | Cash Equivalents
Interest rate	0.03%
RBC U.S. Government Money Market Fund - Institutional Share Class, 0.03% | United States Money Market Funds | Cash Equivalents
Interest rate	0.03%
RBC U.S. Government Money Market Fund - Institutional Share Class, 0.02% | United States Money Market Funds | Cash Equivalents
Interest rate		0.02%

X

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 1B
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=123466505&loc=SL123495323-112611

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

+ Details

Name:	us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

The list of dates or date range within which the options may be exercised of the investment subject to option.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 946
-SubTopic 320
-Section S99
-Paragraph 5D
-Subparagraph (SX 210.12-13D(Footnote 8(d)))
-URI http://asc.fasb.org/extlink&oid=122147990&loc=SL120429264-123010

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 946
-SubTopic 320
-Section S99
-Paragraph 6
-Subparagraph (SX 210.12-14.4(b))
-URI http://asc.fasb.org/extlink&oid=122147990&loc=d3e611322-123010

+ Details

Name:	us-gaap_InvestmentOwnedSubjectToOptionExerciseDates
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Collateral Amount On Open Futures Contracts.

+ References

No definition available.

+ Details

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

X

- Definition

Period of Yield on funds.

+ References

No definition available.

+ Details

Name:	uso_InvestmentOwnedPeriodOfYieldOnFunds
Namespace Prefix:	uso_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=uso_FidelityInvestmentsMoneyMarketFundsGovernmentPortfolioMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_CashAndCashEquivalentsAxis=us-gaap_MoneyMarketFundsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_InvestmentTypeAxis=us-gaap_CashEquivalentsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=uso_GoldmanSachsFinancialSquareFundsGovernmentFundClassFsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=uso_MorganStanleyInstitutionalLiquidityFundGovernmentPortfolioMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=uso_Rbcu.s.governmentMoneyMarketFundInstitutionalShareClass0.03Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=uso_RbcU.s.governmentMoneyMarketFundInstitutionalShareClass0.02Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: