XML 20 R3.htm IDEA: XBRL DOCUMENT
v3.6.0.2

Schedule of Investments | Dec. 31, 2016 USD ($) Contract | Dec. 31, 2015 USD ($) Contract
--- | --- | ---
Unrealized Gain (Loss) on Open Commodity Contracts | $ 111,290,560 |  | $ (138,508,060) |
Open Futures Contracts - Long [Member] | United States [Member] | NYMEX WTI Crude Oil Futures CL November 2016 contracts, expiring January 2016 [Member] |  |  |  |
Number of Contracts | Contract | 57,744 | [1] | 84,290 | [2]
Unrealized Gain (Loss) on Open Commodity Contracts | $ 111,290,560 | [1] | $ (138,508,060) | [2]
% of Partners' Capital | 3.59% | [1] | (4.44%) | [2]
Cash Equivalent [Member] |  |  |  |
Market Value | $ 2,770,212,015 |  | $ 2,468,495,664 |
% of Partners' Capital | 89.31% |  | 79.07% |
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.10%, 01/07/2016 [Member] |  |  |  |
Principal Amount |  |  | $ 50,000,000 |
Market Value |  |  | $ 49,999,208 |
% of Partners' Capital |  |  | 1.60% |
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.11%, 1/14/2016 [Member] |  |  |  |
Principal Amount |  |  | $ 50,000,000 |
Market Value |  |  | $ 49,998,059 |
% of Partners' Capital |  |  | 1.60% |
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.13%, 1/21/2016 [Member] |  |  |  |
Principal Amount |  |  | $ 50,000,000 |
Market Value |  |  | $ 49,996,528 |
% of Partners' Capital |  |  | 1.60% |
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.15%, 1/28/2016 [Member] |  |  |  |
Principal Amount |  |  | $ 75,000,000 |
Market Value |  |  | $ 74,991,844 |
% of Partners' Capital |  |  | 2.41% |
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.19%, 2/04/2016 [Member] |  |  |  |
Principal Amount |  |  | $ 75,000,000 |
Market Value |  |  | $ 74,986,896 |
% of Partners' Capital |  |  | 2.40% |
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.22%, 2/11/2016 [Member] |  |  |  |
Principal Amount |  |  | $ 75,000,000 |
Market Value |  |  | $ 74,981,635 |
% of Partners' Capital |  |  | 2.40% |
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.20%, 2/18/2016 [Member] |  |  |  |
Principal Amount |  |  | $ 75,000,000 |
Market Value |  |  | $ 74,980,000 |
% of Partners' Capital |  |  | 2.40% |
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.20%, 2/25/2016 [Member] |  |  |  |
Principal Amount |  |  | $ 75,000,000 |
Market Value |  |  | $ 74,977,656 |
% of Partners' Capital |  |  | 2.40% |
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.23%, 3/03/2016 [Member] |  |  |  |
Principal Amount |  |  | $ 75,000,000 |
Market Value |  |  | $ 74,970,615 |
% of Partners' Capital |  |  | 2.40% |
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.26%, 3/10/2016 [Member] |  |  |  |
Principal Amount |  |  | $ 75,000,000 |
Market Value |  |  | $ 74,963,344 |
% of Partners' Capital |  |  | 2.40% |
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.24%, 3/17/2016 [Member] |  |  |  |
Principal Amount |  |  | $ 50,000,000 |
Market Value |  |  | $ 49,974,667 |
% of Partners' Capital |  |  | 1.60% |
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.09%, 3/24/2016 [Member] |  |  |  |
Principal Amount |  |  | $ 75,000,000 |
Market Value |  |  | $ 74,985,302 |
% of Partners' Capital |  |  | 2.40% |
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.07%, 3/31/2016 [Member] |  |  |  |
Principal Amount |  |  | $ 75,000,000 |
Market Value |  |  | $ 74,987,812 |
% of Partners' Capital |  |  | 2.41% |
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.07%, 4/07/2016 [Member] |  |  |  |
Principal Amount |  |  | $ 75,000,000 |
Market Value |  |  | $ 74,985,854 |
% of Partners' Capital |  |  | 2.40% |
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.07%, 4/14/2016 [Member] |  |  |  |
Principal Amount |  |  | $ 75,000,000 |
Market Value |  |  | $ 74,985,917 |
% of Partners' Capital |  |  | 2.40% |
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.11%, 4/21/2016 [Member] |  |  |  |
Principal Amount |  |  | $ 75,000,000 |
Market Value |  |  | $ 74,974,563 |
% of Partners' Capital |  |  | 2.40% |
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.21%, 4/28/2016 [Member] |  |  |  |
Principal Amount |  |  | $ 75,000,000 |
Market Value |  |  | $ 74,948,375 |
% of Partners' Capital |  |  | 2.40% |
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.26%, 5/05/2016 [Member] |  |  |  |
Principal Amount |  |  | $ 50,000,000 |
Market Value |  |  | $ 49,954,861 |
% of Partners' Capital |  |  | 1.60% |
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.33%, 5/12/2016 [Member] |  |  |  |
Principal Amount |  |  | $ 70,000,000 |
Market Value |  |  | $ 69,915,300 |
% of Partners' Capital |  |  | 2.24% |
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.31%, 5/19/2016 [Member] |  |  |  |
Principal Amount |  |  | $ 75,000,000 |
Market Value |  |  | $ 74,910,229 |
% of Partners' Capital |  |  | 2.40% |
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.35%, 5/26/2016 [Member] |  |  |  |
Principal Amount |  |  | $ 80,000,000 |
Market Value |  |  | $ 79,886,445 |
% of Partners' Capital |  |  | 2.56% |
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.43%, 6/02/2016 [Member] |  |  |  |
Principal Amount |  |  | $ 75,000,000 |
Market Value |  |  | $ 74,864,531 |
% of Partners' Capital |  |  | 2.40% |
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.52%, 6/09/2016 [Member] |  |  |  |
Principal Amount |  |  | $ 50,000,000 |
Market Value |  |  | $ 49,884,445 |
% of Partners' Capital |  |  | 1.60% |
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.48%, 6/16/2016 [Member] |  |  |  |
Principal Amount |  |  | $ 50,000,000 |
Market Value |  |  | $ 49,888,667 |
% of Partners' Capital |  |  | 1.60% |
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.46%, 6/23/2016 [Member] |  |  |  |
Principal Amount |  |  | $ 70,000,000 |
Market Value |  |  | $ 69,846,058 |
% of Partners' Capital |  |  | 2.24% |
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.00%, 6/30/2016 [Member] |  |  |  |
Principal Amount |  |  | $ 150,000,000 |
Market Value |  |  | $ 149,656,853 |
% of Partners' Capital |  |  | 4.79% |
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.34%, 1/05/2017 [Member] |  |  |  |
Principal Amount | $ 75,000,000 |  |  |
Market Value | $ 74,997,167 |  |  |
% of Partners' Capital | 2.42% |  |  |
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.38%, 1/12/2017 [Member] |  |  |  |
Principal Amount | $ 50,000,000 |  |  |
Market Value | $ 49,994,194 |  |  |
% of Partners' Capital | 1.61% |  |  |
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.43%, 1/19/2017 [Member] |  |  |  |
Principal Amount | $ 50,000,000 |  |  |
Market Value | $ 49,989,375 |  |  |
% of Partners' Capital | 1.61% |  |  |
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.36%, 1/26/2017 [Member] |  |  |  |
Principal Amount | $ 100,000,000 |  |  |
Market Value | $ 99,975,000 |  |  |
% of Partners' Capital | 3.22% |  |  |
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.40%, 2/02/2017 [Member] |  |  |  |
Principal Amount | $ 75,000,000 |  |  |
Market Value | $ 74,973,333 |  |  |
% of Partners' Capital | 2.42% |  |  |
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.42%, 2/09/2017 [Member] |  |  |  |
Principal Amount | $ 75,000,000 |  |  |
Market Value | $ 74,965,875 |  |  |
% of Partners' Capital | 2.42% |  |  |
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.45%, 2/16/2017 [Member] |  |  |  |
Principal Amount | $ 100,000,000 |  |  |
Market Value | $ 99,942,500 |  |  |
% of Partners' Capital | 3.22% |  |  |
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.45%, 2/23/2017 [Member] |  |  |  |
Principal Amount | $ 75,000,000 |  |  |
Market Value | $ 74,950,865 |  |  |
% of Partners' Capital | 2.42% |  |  |
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.45%, 3/02/2017 [Member] |  |  |  |
Principal Amount | $ 75,000,000 |  |  |
Market Value | $ 74,943,750 |  |  |
% of Partners' Capital | 2.42% |  |  |
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.47%, 3/09/2017 [Member] |  |  |  |
Principal Amount | $ 100,000,000 |  |  |
Market Value | $ 99,912,528 |  |  |
% of Partners' Capital | 3.22% |  |  |
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.50%, 3/16/2017 [Member] |  |  |  |
Principal Amount | $ 75,000,000 |  |  |
Market Value | $ 74,922,531 |  |  |
% of Partners' Capital | 2.42% |  |  |
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.45%, 3/23/2017 [Member] |  |  |  |
Principal Amount | $ 75,000,000 |  |  |
Market Value | $ 74,924,906 |  |  |
% of Partners' Capital | 2.42% |  |  |
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.43%, 3/30/2017 [Member] |  |  |  |
Principal Amount | $ 75,000,000 |  |  |
Market Value | $ 74,921,167 |  |  |
% of Partners' Capital | 2.42% |  |  |
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.46%, 4/06/2017 [Member] |  |  |  |
Principal Amount | $ 75,000,000 |  |  |
Market Value | $ 74,909,948 |  |  |
% of Partners' Capital | 2.41% |  |  |
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.47%, 4/13/2017 [Member] |  |  |  |
Principal Amount | $ 75,000,000 |  |  |
Market Value | $ 74,900,125 |  |  |
% of Partners' Capital | 2.41% |  |  |
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.46%, 4/20/2017 [Member] |  |  |  |
Principal Amount | $ 75,000,000 |  |  |
Market Value | $ 74,896,677 |  |  |
% of Partners' Capital | 2.41% |  |  |
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.47%, 4/27/2017 [Member] |  |  |  |
Principal Amount | $ 100,000,000 |  |  |
Market Value | $ 99,850,167 |  |  |
% of Partners' Capital | 3.22% |  |  |
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.52%, 5/04/2017 [Member] |  |  |  |
Principal Amount | $ 75,000,000 |  |  |
Market Value | $ 74,866,750 |  |  |
% of Partners' Capital | 2.41% |  |  |
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.55%, 5/11/2017 [Member] |  |  |  |
Principal Amount | $ 75,000,000 |  |  |
Market Value | $ 74,852,396 |  |  |
% of Partners' Capital | 2.41% |  |  |
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.60%, 5/18/2017 [Member] |  |  |  |
Principal Amount | $ 75,000,000 |  |  |
Market Value | $ 74,830,177 |  |  |
% of Partners' Capital | 2.41% |  |  |
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.61%, 5/25/2017 [Member] |  |  |  |
Principal Amount | $ 100,000,000 |  |  |
Market Value | $ 99,757,000 |  |  |
% of Partners' Capital | 3.22% |  |  |
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.60%, 6/01/2017 [Member] |  |  |  |
Principal Amount | $ 75,000,000 |  |  |
Market Value | $ 74,812,823 |  |  |
% of Partners' Capital | 2.41% |  |  |
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.62%, 6/08/2017 [Member] |  |  |  |
Principal Amount | $ 75,000,000 |  |  |
Market Value | $ 74,797,562 |  |  |
% of Partners' Capital | 2.41% |  |  |
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.65%, 6/15/2017 [Member] |  |  |  |
Principal Amount | $ 75,000,000 |  |  |
Market Value | $ 74,778,282 |  |  |
% of Partners' Capital | 2.41% |  |  |
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.64%, 6/22/2017 [Member] |  |  |  |
Principal Amount | $ 75,000,000 |  |  |
Market Value | $ 74,770,666 |  |  |
% of Partners' Capital | 2.41% |  |  |
Cash Equivalent [Member] | United States [Member] | U.S. Treasury Bills, 0.60%, 6/29/2017 [Member] |  |  |  |
Principal Amount | $ 75,000,000 |  |  |
Market Value | $ 74,776,250 |  |  |
% of Partners' Capital | 2.41% |  |  |
Cash Equivalent [Member] | United States [Member] | US Treasury Securities [Member] |  |  |  |
Market Value | $ 2,022,212,014 |  | $ 1,843,495,664 |
% of Partners' Capital | 65.19% |  | 59.05% |
Cash Equivalent [Member] | United States [Member] | Money Market Funds [Member] |  |  |  |
Market Value | $ 748,000,001 |  | $ 625,000,000 |
% of Partners' Capital | 24.12% |  | 20.02% |
Cash Equivalent [Member] | United States [Member] | Money Market Funds [Member] | Fidelity Investments Money Market Funds - Government Portfolio [Member] |  |  |  |
Principal Amount | $ 300,000,000 |  | $ 200,000,000 |
Market Value | $ 300,000,000 |  | $ 200,000,000 |
% of Partners' Capital | 9.67% |  | 6.41% |
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 |  | $ 225,000,000 |
Market Value | $ 200,000,001 |  | $ 225,000,000 |
% of Partners' Capital | 6.45% |  | 7.20% |
Cash Equivalent [Member] | United States [Member] | Money Market Funds [Member] | Morgan Stanley Institutional Liquidity Fund Government Portfolio [Member] |  |  |  |
Principal Amount | $ 198,000,000 |  | $ 200,000,000 |
Market Value | $ 198,000,000 |  | $ 200,000,000 |
% of Partners' Capital | 6.39% |  | 6.41% |
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 | 1.61% |  |  |
[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 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_InvestmentSecuritiesSeriesAxis=uso_UsTreasuryBillSecuritiesTwentySevenMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | invest_InvestmentSecuritiesSeriesAxis=uso_UsTreasuryBillSecuritiesTwentyEightMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | invest_InvestmentSecuritiesSeriesAxis=uso_UsTreasuryBillSecuritiesTwentyNineMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | invest_InvestmentSecuritiesSeriesAxis=uso_UsTreasuryBillSecuritiesThirtyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | invest_InvestmentSecuritiesSeriesAxis=uso_UsTreasuryBillSecuritiesThirtyOneMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | invest_InvestmentSecuritiesSeriesAxis=uso_UsTreasuryBillSecuritiesThirtyTwoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | invest_InvestmentSecuritiesSeriesAxis=uso_UsTreasuryBillSecuritiesThirtyThreeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | invest_InvestmentSecuritiesSeriesAxis=uso_UsTreasuryBillSecuritiesThirtyFourMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | invest_InvestmentSecuritiesSeriesAxis=uso_UsTreasuryBillSecuritiesThirtyFiveMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | invest_InvestmentSecuritiesSeriesAxis=uso_UsTreasuryBillSecuritiesThirtySixMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | invest_InvestmentSecuritiesSeriesAxis=uso_UsTreasuryBillSecuritiesThirtySevenMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | invest_InvestmentSecuritiesSeriesAxis=uso_UsTreasuryBillSecuritiesThirtyEightMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | invest_InvestmentSecuritiesSeriesAxis=uso_UsTreasuryBillSecuritiesThirtyNineMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | invest_InvestmentSecuritiesSeriesAxis=uso_UsTreasuryBillSecuritiesFortyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | invest_InvestmentSecuritiesSeriesAxis=uso_UsTreasuryBillSecuritiesFortyOneMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | invest_InvestmentSecuritiesSeriesAxis=uso_UsTreasuryBillSecuritiesFortyTwoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | invest_InvestmentSecuritiesSeriesAxis=uso_UsTreasuryBillSecuritiesFortyThreeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | invest_InvestmentSecuritiesSeriesAxis=uso_UsTreasuryBillSecuritiesFortyFourMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | invest_InvestmentSecuritiesSeriesAxis=uso_UsTreasuryBillSecuritiesFortyFiveMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | invest_InvestmentSecuritiesSeriesAxis=uso_UsTreasuryBillSecuritiesFortySixMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | invest_InvestmentSecuritiesSeriesAxis=uso_UsTreasuryBillSecuritiesFortySevenMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | invest_InvestmentSecuritiesSeriesAxis=uso_UsTreasuryBillSecuritiesFortyEightMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | invest_InvestmentSecuritiesSeriesAxis=uso_UsTreasuryBillSecuritiesFortyNineMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | invest_InvestmentSecuritiesSeriesAxis=uso_UsTreasuryBillSecuritiesFiftyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | invest_InvestmentSecuritiesSeriesAxis=uso_UsTreasuryBillSecuritiesFiftyOneMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | invest_InvestmentSecuritiesSeriesAxis=uso_UsTreasuryBillSecuritiesFiftyTwoMember
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_FidelityInvestmentsMoneyMarketFundsGovernmentPortfolioMember
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: |