XML 19 R3.htm IDEA: XBRL DOCUMENT v3.5.0.2

Condensed Schedule of Investments	Sep. 30, 2016 USD ($) Contract
Unrealized Gain (Loss) on Open Commodity Contracts	$ 131,531,240
Open Futures Contracts - Long [Member] | United States [Member] | NYMEX WTI Crude Oil Futures CL November 2016 contracts, expiring October 2016 [Member]
Number of Contracts | Contract	70,420	[1]
Unrealized Gain (Loss) on Open Commodity Contracts	$ 131,531,240	[1]
% of Partners' Capital	3.87%	[1]
Cash Equivalent [Member]
Market Value	$ 2,837,763,208
% of Partners' Capital	83.54%
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.34%, 10/06/2016 [Member]
Principal Amount	$ 75,000,000
Market Value	$ 74,996,510
% of Partners' Capital	2.21%
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.35%, 10/13/2016 [Member]
Principal Amount	$ 75,000,000
Market Value	$ 74,991,375
% of Partners' Capital	2.21%
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.34%, 10/20/2016 [Member]
Principal Amount	$ 75,000,000
Market Value	$ 74,986,542
% of Partners' Capital	2.21%
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.39%, 10/27/2016 [Member]
Principal Amount	$ 100,000,000
Market Value	$ 99,971,653
% of Partners' Capital	2.94%
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.37%, 11/03/2016 [Member]
Principal Amount	$ 75,000,000
Market Value	$ 74,974,391
% of Partners' Capital	2.21%
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.36%, 11/10/2016 [Member]
Principal Amount	$ 70,000,000
Market Value	$ 69,972,389
% of Partners' Capital	2.06%
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.39%, 11/17/2016 [Member]
Principal Amount	$ 75,000,000
Market Value	$ 74,961,812
% of Partners' Capital	2.21%
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.46%, 11/25/2016 [Member]
Principal Amount	$ 170,000,000
Market Value	$ 169,881,826
% of Partners' Capital	5.00%
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.47%, 12/01/2016 [Member]
Principal Amount	$ 75,000,000
Market Value	$ 74,940,906
% of Partners' Capital	2.21%
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.41%, 12/08/2016 [Member]
Principal Amount	$ 75,000,000
Market Value	$ 74,941,917
% of Partners' Capital	2.21%
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.34%, 12/15/2016 [Member]
Principal Amount	$ 75,000,000
Market Value	$ 74,946,875
% of Partners' Capital	2.21%
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.39%, 12/22/2016 [Member]
Principal Amount	$ 75,000,000
Market Value	$ 74,933,802
% of Partners' Capital	2.21%
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.34%, 12/29/2016 [Member]
Principal Amount	$ 75,000,000
Market Value	$ 74,937,885
% of Partners' Capital	2.21%
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.34%, 1/05/2017 [Member]
Principal Amount	$ 75,000,000
Market Value	$ 74,932,000
% of Partners' Capital	2.20%
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.38%, 1/12/2017 [Member]
Principal Amount	$ 50,000,000
Market Value	$ 49,945,639
% of Partners' Capital	1.47%
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.43%, 1/19/2017 [Member]
Principal Amount	$ 50,000,000
Market Value	$ 49,935,069
% of Partners' Capital	1.47%
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.36%, 1/26/2017 [Member]
Principal Amount	$ 100,000,000
Market Value	$ 99,883,000
% of Partners' Capital	2.94%
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.40%, 2/02/2017 [Member]
Principal Amount	$ 75,000,000
Market Value	$ 74,896,667
% of Partners' Capital	2.20%
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.42%, 2/09/2017 [Member]
Principal Amount	$ 75,000,000
Market Value	$ 74,885,375
% of Partners' Capital	2.20%
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.45%, 2/16/2017 [Member]
Principal Amount	$ 100,000,000
Market Value	$ 99,827,500
% of Partners' Capital	2.94%
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.45%, 2/23/2017 [Member]
Principal Amount	$ 75,000,000
Market Value	$ 74,865,573
% of Partners' Capital	2.20%
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.45%, 3/02/2017 [Member]
Principal Amount	$ 75,000,000
Market Value	$ 74,857,500
% of Partners' Capital	2.20%
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.47%, 3/09/2017 [Member]
Principal Amount	$ 100,000,000
Market Value	$ 99,792,417
% of Partners' Capital	2.94%
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.50%, 3/16/2017 [Member]
Principal Amount	$ 75,000,000
Market Value	$ 74,826,219
% of Partners' Capital	2.20%
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.45%, 3/23/2017 [Member]
Principal Amount	$ 75,000,000
Market Value	$ 74,839,615
% of Partners' Capital	2.20%
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.43%, 3/30/2017 [Member]
Principal Amount	$ 75,000,000
Market Value	$ 74,838,750
% of Partners' Capital	2.20%
Cash Equivalent [Member] | United States [Member] | US Treasury Securities [Member]
Market Value	$ 2,087,763,207
% of Partners' Capital	61.46%
Cash Equivalent [Member] | United States [Member] | Money Market Funds [Member]
Market Value	$ 750,000,001
% of Partners' Capital	22.08%
Cash Equivalent [Member] | United States [Member] | Money Market Funds [Member] | Fidelity Institutional Money Market Funds - Government Portfolio [Member]
Principal Amount	$ 300,000,000
Market Value	$ 300,000,000
% of Partners' Capital	8.83%
Cash Equivalent [Member] | United States [Member] | Money Market Funds [Member] | Goldman Sachs Financial Square Funds - Government Fund - Class FS [Member]
Principal Amount	$ 200,000,001
Market Value	$ 200,000,001
% of Partners' Capital	5.89%
Cash Equivalent [Member] | United States [Member] | Money Market Funds [Member] | Morgan Stanley Institutional Liquidity Funds - Government Portfolio [Member]
Principal Amount	$ 200,000,000
Market Value	$ 200,000,000
% of Partners' Capital	5.89%
Cash Equivalent [Member] | United States [Member] | Money Market Funds [Member] | Wells Fargo Advantage Government Money Market Fund - Class I [Member]
Principal Amount	$ 50,000,000
Market Value	$ 50,000,000
% of Partners' Capital	1.47%
[1] Collateral amounted to $239,891,625 on open futures contracts.

X

- Definition

Balance held at close of period in number of contracts.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 946
-SubTopic 320
-Section S99
-Paragraph 4
-Subparagraph (SX 210.12-12C.Column B)
-URI http://asc.fasb.org/extlink&oid=50485924&loc=d3e611225-123010

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 946
-SubTopic 320
-Section S99
-Paragraph 1
-Subparagraph (SX 210.12-12.Column B)
-URI http://asc.fasb.org/extlink&oid=50485924&loc=d3e611133-123010

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 946
-SubTopic 320
-Section S99
-Paragraph 6
-Subparagraph (SX 210.12-14.Column B)
-URI http://asc.fasb.org/extlink&oid=50485924&loc=d3e611322-123010

+ Details

Name:	us-gaap_InvestmentOwnedBalanceContracts
Namespace Prefix:	us-gaap_
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	instant

X

- Definition

For investments which are quantified by principal amount, the principle balance held at close of period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 946
-SubTopic 320
-Section S99
-Paragraph 6
-Subparagraph (SX 210.12-14.Column B)
-URI http://asc.fasb.org/extlink&oid=50485924&loc=d3e611322-123010

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 946
-SubTopic 320
-Section S99
-Paragraph 1
-Subparagraph (SX 210.12-12.Column B)
-URI http://asc.fasb.org/extlink&oid=50485924&loc=d3e611133-123010

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 946
-SubTopic 320
-Section S99
-Paragraph 4
-Subparagraph (SX 210.12-12C.Column B)
-URI http://asc.fasb.org/extlink&oid=50485924&loc=d3e611225-123010

+ Details

Name:	us-gaap_InvestmentOwnedBalancePrincipalAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Nominal or face amount on the investment owned.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Underlying
-URI http://asc.fasb.org/extlink&oid=6527499

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 10
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=6431724&loc=d3e32938-113948

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 20
-Section 10
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6438156&loc=d3e57880-113973

+ Details

Name:	us-gaap_InvestmentOwnedUnderlyingFaceAmountAtMarketValue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Percentage of Partners Capital

+ References

No definition available.

+ Details

Name:	uso_PercentageOfPartnersCapital
Namespace Prefix:	uso_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Unrealized gain (loss) on open commodity futures contracts.

+ References

No definition available.

+ Details

Name:	uso_UnrealizedGainLossOnOpenCommodityFuturesContracts
Namespace Prefix:	uso_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Details

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

X

- Details

Name:	invest_InvestmentGeographicRegionAxis=country_US
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	invest_InvestmentSecuritiesSeriesAxis=uso_NyMember
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:	invest_InvestmentSecuritiesSeriesAxis=uso_UsTreasuryBillSecuritiesOneMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	invest_InvestmentSecuritiesSeriesAxis=uso_UsTreasuryBillSecuritiesTwoMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	invest_InvestmentSecuritiesSeriesAxis=uso_UsTreasuryBillSecuritiesThreeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	invest_InvestmentSecuritiesSeriesAxis=uso_UsTreasuryBillSecuritiesFourMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	invest_InvestmentSecuritiesSeriesAxis=uso_UsTreasuryBillSecuritiesFiveMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	invest_InvestmentSecuritiesSeriesAxis=uso_UsTreasuryBillSecuritiesSixMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	invest_InvestmentSecuritiesSeriesAxis=uso_UsTreasuryBillSecuritiesSevenMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	invest_InvestmentSecuritiesSeriesAxis=uso_UsTreasuryBillSecuritiesEightMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	invest_InvestmentSecuritiesSeriesAxis=uso_UsTreasuryBillSecuritiesNineMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	invest_InvestmentSecuritiesSeriesAxis=uso_UsTreasuryBillSecuritiesTenMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	invest_InvestmentSecuritiesSeriesAxis=uso_UsTreasuryBillSecuritiesElevenMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	invest_InvestmentSecuritiesSeriesAxis=uso_UsTreasuryBillSecuritiesTwelveMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	invest_InvestmentSecuritiesSeriesAxis=uso_UsTreasuryBillSecuritiesThirteenMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	invest_InvestmentSecuritiesSeriesAxis=uso_UsTreasuryBillSecuritiesFourteenMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	invest_InvestmentSecuritiesSeriesAxis=uso_UsTreasuryBillSecuritiesFifteenMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	invest_InvestmentSecuritiesSeriesAxis=uso_UsTreasuryBillSecuritiesSixteenMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	invest_InvestmentSecuritiesSeriesAxis=uso_UsTreasuryBillSecuritiesSeventeenMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	invest_InvestmentSecuritiesSeriesAxis=uso_UsTreasuryBillSecuritiesEighteenMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	invest_InvestmentSecuritiesSeriesAxis=uso_UsTreasuryBillSecuritiesNineteenMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	invest_InvestmentSecuritiesSeriesAxis=uso_UsTreasuryBillSecuritiesTwentyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	invest_InvestmentSecuritiesSeriesAxis=uso_UsTreasuryBillSecuritiesTwentyOneMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	invest_InvestmentSecuritiesSeriesAxis=uso_UsTreasuryBillSecuritiesTwentyTwoMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	invest_InvestmentSecuritiesSeriesAxis=uso_UsTreasuryBillSecuritiesTwentyThreeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	invest_InvestmentSecuritiesSeriesAxis=uso_UsTreasuryBillSecuritiesTwentyFourMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	invest_InvestmentSecuritiesSeriesAxis=uso_UsTreasuryBillSecuritiesTwentyFiveMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	invest_InvestmentSecuritiesSeriesAxis=uso_UsTreasuryBillSecuritiesTwentySixMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	invest_InvestmentSecuritiesClassAxis=us-gaap_USTreasurySecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

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

X

- Details

Name:	invest_InvestmentSecuritiesSeriesAxis=uso_FidelityInstitutionalGovernmentPortfolioClassIMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

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

X

- Details

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

X

- Details

Name:	invest_InvestmentSecuritiesSeriesAxis=uso_WellsFargoAdvantageGovernmentMoneyMarketFundClassIMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: