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v2.4.1.9

Condensed Statements of Cash Flows (USD $) | 3 Months Ended
--- | ---
Mar. 31, 2015 | Mar. 31, 2014
Cash Flows from Operating Activities: |  |
Net income (loss) | $ (276,690,243)us-gaap_NetIncomeLoss | $ 29,579,359 us-gaap_NetIncomeLoss
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities: |  |
(Increase) decrease in commodity futures trading account - cash and cash equivalents | (94,332,573)us-gaap_IncreaseDecreaseInFinancialInstrumentsUsedInOperatingActivities | (18,261,838)us-gaap_IncreaseDecreaseInFinancialInstrumentsUsedInOperatingActivities
Unrealized (gain) loss on open futures contracts | (51,633,790)us-gaap_UnrealizedGainLossOnDerivativesAndCommodityContracts | (3,654,730)us-gaap_UnrealizedGainLossOnDerivativesAndCommodityContracts
(Increase) decrease in dividends receivable | (849)us-gaap_IncreaseDecreaseInDividendsReceivable | 2,710 us-gaap_IncreaseDecreaseInDividendsReceivable
(Increase) decrease in interest receivable | 0 us-gaap_IncreaseDecreaseInAccruedInterestReceivableNet | 52 us-gaap_IncreaseDecreaseInAccruedInterestReceivableNet
(Increase) decrease in directors' fees and insurance receivable | (35,835)us-gaap_IncreaseDecreaseInAccountsReceivableRelatedParties | (44,390)us-gaap_IncreaseDecreaseInAccountsReceivableRelatedParties
(Increase) decrease in prepaid registration fees | (970,741)us-gaap_IncreaseDecreaseInPrepaidExpense | 0 us-gaap_IncreaseDecreaseInPrepaidExpense
(Increase) decrease in ETF transaction fees receivable | (1,000)us-gaap_IncreaseDecreaseInAccountsAndOtherReceivables | 1,000 us-gaap_IncreaseDecreaseInAccountsAndOtherReceivables
Increase (decrease) in General Partner management fees payable | 651,175 uso_IncreaseDecreaseManagementFeesPayable | (14,171)uso_IncreaseDecreaseManagementFeesPayable
Increase (decrease) in professional fees payable | (510,645)uso_IncreaseDecreaseInProfessionalFeesPayable | (403,073)uso_IncreaseDecreaseInProfessionalFeesPayable
Increase (decrease) in license fees payable | 14,290 uso_IncreaseDecreaseInLicenseFeesPayable | (4,423)uso_IncreaseDecreaseInLicenseFeesPayable
Increase (decrease) in directors' fees and insurance payable | (21,780)us-gaap_IncreaseDecreaseInDueToOfficersAndStockholders | (20,881)us-gaap_IncreaseDecreaseInDueToOfficersAndStockholders
Increase (decrease) in brokerage commissions payable | 137,822 us-gaap_IncreaseDecreaseInPayablesToBrokerDealers | 1,000 us-gaap_IncreaseDecreaseInPayablesToBrokerDealers
Net cash provided by (used in) operating activities | (423,394,169)us-gaap_NetCashProvidedByUsedInOperatingActivities | 7,180,615 us-gaap_NetCashProvidedByUsedInOperatingActivities
Cash Flows from Financing Activities: |  |
Addition of partnership shares | 3,130,059,912 us-gaap_ProceedsFromPartnershipContribution | 1,722,954,545 us-gaap_ProceedsFromPartnershipContribution
Redemption of partnership shares | (1,245,416,310)uso_PaymentsToPartnershipRedemption | (1,752,315,729)uso_PaymentsToPartnershipRedemption
Net cash provided by (used in) financing activities | 1,884,643,602 us-gaap_NetCashProvidedByUsedInFinancingActivities | (29,361,184)us-gaap_NetCashProvidedByUsedInFinancingActivities
Net Increase (Decrease) in Cash and Cash Equivalents | 1,461,249,433 us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease | (22,180,569)us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease
Cash and Cash Equivalents, beginning of period | 1,139,071,536 us-gaap_CashAndCashEquivalentsAtCarryingValue | 570,875,786 us-gaap_CashAndCashEquivalentsAtCarryingValue
Cash and Cash Equivalents, end of period | $ 2,600,320,969 us-gaap_CashAndCashEquivalentsAtCarryingValue | $ 548,695,217 us-gaap_CashAndCashEquivalentsAtCarryingValue

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