XML 41 R24.htm IDEA: XBRL DOCUMENT
v3.6.0.2

ORGANIZATION AND BUSINESS (Additional Information) (Detail) | Apr. 10, 2006 USD ($) $ / shares shares | Dec. 31, 2016 Contract $ / shares $ / Unit shares | Dec. 31, 2015 Contract $ / shares | Dec. 31, 2014 $ / shares | Dec. 31, 2013 $ / shares
--- | --- | --- | --- | --- | ---
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items] |  |  |  |  |  |  |
Fee paid by Authorized Purchasers for each order placed to create one or more Creation Baskets or to redeem one or more baskets | $ / Unit |  | 1,000 |  |  |  |  |
Limited Partners' Capital Account, Units Authorized | 17,000,000 | 3,127,000,000 |  |  |  |  |
Limited Partners' Capital Account, Units Issued | 200,000 |  |  |  |  |  |
Net asset value per unit | $ / shares | $ 67.39 | $ 11.71 |  | $ 11.02 |  | $ 20.15 | $ 35.23
Value of units issued | $ | $ 13,479,000 |  |  |  |  |  |
Creation Baskets [Member] |  |  |  |  |  |  |
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items] |  |  |  |  |  |  |
Number of units per basket |  | 100,000 |  |  |  |  |
Redemption Baskets [Member] |  |  |  |  |  |  |
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items] |  |  |  |  |  |  |
Number of units per basket |  | 100,000 |  |  |  |  |
Open Futures Contracts, Long [Member] | United States [Member] | NYMEX WTI Crude Oil Futures CL November 2016 contracts, expiring October 2016 [Member] |  |  |  |  |  |  |
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items] |  |  |  |  |  |  |
Number of Contracts | Contract |  | 57,744 | [1] | 84,290 | [2] |  |
[1] | Collateral amounted to $249,864,944 on open futures contracts.
[2] | Collateral amounted to $551,734,919 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 The number of limited partner units authorized to be issued. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 5 -Subparagraph (SAB Topic 4.F) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187171-122770 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 272 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6373374&loc=d3e70434-108055 + Details
Name: | us-gaap_LimitedPartnersCapitalAccountUnitsAuthorized
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition The number of limited partner units issued. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 5 -Subparagraph (SAB Topic 4.F) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187171-122770 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 272 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6373374&loc=d3e70434-108055 + Details
Name: | us-gaap_LimitedPartnersCapitalAccountUnitsIssued
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Fee Paid Per Order + References No definition available. + Details
Name: | uso_FeePaidPerOrder
Namespace Prefix: | uso_
Data Type: | us-types:perUnitItemType
Balance Type: | na
Period Type: | instant

X
- Definition Net asset value per unit. + References No definition available. + Details
Name: | uso_NetAssetValuePerUnit
Namespace Prefix: | uso_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of units per basket. + References No definition available. + Details
Name: | uso_NumberOfUnitPerBasket
Namespace Prefix: | uso_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items] + References No definition available. + Details
Name: | uso_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureLineItems
Namespace Prefix: | uso_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Units Issued During Period, Value, New Issues + References No definition available. + Details
Name: | uso_UnitsIssuedDuringPeriodValueNewIssues
Namespace Prefix: | uso_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | invest_InvestmentSecuritiesClassAxis=uso_CreationBasketsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | invest_InvestmentSecuritiesClassAxis=uso_RedemptionBasketsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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: |