2.3.0.15 Html 232 218 1 false 58 0 false 4 true false R1.htm 000990 - Document - Document And Entity Information Sheet http://oneokpartners.com/role/DocumentAndEntityInformation Document And Entity Information false false R2.htm 001000 - Statement - CONSOLIDATED STATEMENTS OF INCOME Sheet http://oneokpartners.com/role/ConsolidatedStatementsOfIncome CONSOLIDATED STATEMENTS OF INCOME false false R3.htm 002000 - Statement - CONSOLIDATED BALANCE SHEETS Sheet http://oneokpartners.com/role/ConsolidatedBalanceSheets CONSOLIDATED BALANCE SHEETS false false R4.htm 002010 - Statement - CONSOLIDATED BALANCE SHEETS (Parenthetical) Sheet http://oneokpartners.com/role/ConsolidatedBalanceSheetsParenthetical CONSOLIDATED BALANCE SHEETS (Parenthetical) false false R5.htm 003000 - Statement - CONSOLIDATED STATEMENTS OF CASH FLOWS Sheet http://oneokpartners.com/role/ConsolidatedStatementsOfCashFlows CONSOLIDATED STATEMENTS OF CASH FLOWS false false R6.htm 004000 - Statement - CONSOLIDATED STATEMENT OF CHANGES IN EQUITY Sheet http://oneokpartners.com/role/ConsolidatedStatementOfChangesInEquity CONSOLIDATED STATEMENT OF CHANGES IN EQUITY false false R7.htm 005000 - Statement - CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME Sheet http://oneokpartners.com/role/ConsolidatedStatementsOfComprehensiveIncome CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME false false R8.htm 006010 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Sheet http://oneokpartners.com/role/SummaryOfSignificantAccountingPolicies SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES false false R9.htm 006020 - Disclosure - FAIR VALUE MEASUREMENTS Sheet http://oneokpartners.com/role/FairValueMeasurements FAIR VALUE MEASUREMENTS false false R10.htm 006030 - Disclosure - RISK MANAGEMENT AND HEDGING ACTIVITIES USING DERIVATIVES Sheet http://oneokpartners.com/role/RiskManagementAndHedgingActivitiesUsingDerivatives RISK MANAGEMENT AND HEDGING ACTIVITIES USING DERIVATIVES false false R11.htm 006040 - Disclosure - CREDIT FACILITIES AND SHORT Sheet http://oneokpartners.com/role/CreditFacilitiesAndShort CREDIT FACILITIES AND SHORT false false R12.htm 006050 - Disclosure - LONG-TERM DEBT Sheet http://oneokpartners.com/role/LongTermDebt LONG-TERM DEBT false false R13.htm 006060 - Disclosure - EQUITY Sheet http://oneokpartners.com/role/Equity EQUITY false false R14.htm 006070 - Disclosure - LIMITED PARTNERS' NET INCOME PER UNIT Sheet http://oneokpartners.com/role/LimitedPartnersNetIncomePerUnit LIMITED PARTNERS' NET INCOME PER UNIT false false R15.htm 006080 - Disclosure - UNCONSOLIDATED AFFILIATES Sheet http://oneokpartners.com/role/UnconsolidatedAffiliates UNCONSOLIDATED AFFILIATES false false R16.htm 006090 - Disclosure - RELATED-PARTY TRANSACTIONS Sheet http://oneokpartners.com/role/RelatedPartyTransactions RELATED-PARTY TRANSACTIONS false false R17.htm 006100 - Disclosure - COMMITMENTS AND CONTINGENCIES Sheet http://oneokpartners.com/role/CommitmentsAndContingencies COMMITMENTS AND CONTINGENCIES false false R18.htm 006110 - Disclosure - SEGMENTS Sheet http://oneokpartners.com/role/Segments SEGMENTS false false R19.htm 006120 - Disclosure - SUPPLEMENTAL CONDENSED CONSOLIDATING FINANCIAL INFORMATION Sheet http://oneokpartners.com/role/SupplementalCondensedConsolidatingFinancialInformation SUPPLEMENTAL CONDENSED CONSOLIDATING FINANCIAL INFORMATION false false R20.htm 007030 - Disclosure - RISK MANAGEMENT AND HEDGING ACTIVITIES USING DERIVATIVES (Policies) Sheet http://oneokpartners.com/role/RiskManagementAndHedgingActivitiesUsingDerivativesPolicies RISK MANAGEMENT AND HEDGING ACTIVITIES USING DERIVATIVES (Policies) false false R21.htm 007060 - Disclosure - EQUITY (Policies) Sheet http://oneokpartners.com/role/EquityPolicies EQUITY (Policies) false false R22.htm 008020 - Disclosure - FAIR VALUE MEASUREMENTS (Tables) Sheet http://oneokpartners.com/role/FairValueMeasurementsTables FAIR VALUE MEASUREMENTS (Tables) false false R23.htm 008030 - Disclosure - RISK MANAGEMENT AND HEDGING ACTIVITIES USING DERIVATIVES (Tables) Sheet http://oneokpartners.com/role/RiskManagementAndHedgingActivitiesUsingDerivativesTables RISK MANAGEMENT AND HEDGING ACTIVITIES USING DERIVATIVES (Tables) false false R24.htm 008080 - Disclosure - UNCONSOLIDATED AFFILIATES (Tables) Sheet http://oneokpartners.com/role/UnconsolidatedAffiliatesTables UNCONSOLIDATED AFFILIATES (Tables) false false R25.htm 008090 - Disclosure - RELATED-PARTY TRANSACTIONS (Tables) Sheet http://oneokpartners.com/role/RelatedPartyTransactionsTables RELATED-PARTY TRANSACTIONS (Tables) false false R26.htm 008110 - Disclosure - SEGMENTS (Tables) Sheet http://oneokpartners.com/role/SegmentsTables SEGMENTS (Tables) false false R27.htm 008120 - Disclosure - SUPPLEMENTAL CONDENSED CONSOLIDATING FINANCIAL INFORMATION (Tables) Sheet http://oneokpartners.com/role/SupplementalCondensedConsolidatingFinancialInformationTables SUPPLEMENTAL CONDENSED CONSOLIDATING FINANCIAL INFORMATION (Tables) false false R28.htm 009010 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) Sheet http://oneokpartners.com/role/SummaryOfSignificantAccountingPoliciesDetails SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) false false R29.htm 009020 - Disclosure - FAIR VALUE MEASUREMENTS (Details) Sheet http://oneokpartners.com/role/FairValueMeasurementsDetails FAIR VALUE MEASUREMENTS (Details) false false R30.htm 009030 - Disclosure - RISK MANAGEMENT AND HEDGING ACTIVITIES USING DERIVATIVES (Details) Sheet http://oneokpartners.com/role/RiskManagementAndHedgingActivitiesUsingDerivativesDetails RISK MANAGEMENT AND HEDGING ACTIVITIES USING DERIVATIVES (Details) false false R31.htm 009031 - Disclosure - RISK MANAGEMENT AND HEDGING ACTIVITIES USING DERIVATIVES, BY INCOME STATEMENT LOCATIONS (Details) Sheet http://oneokpartners.com/role/RiskManagementAndHedgingActivitiesUsingDerivativesByIncomeStatementLocationDetails RISK MANAGEMENT AND HEDGING ACTIVITIES USING DERIVATIVES, BY INCOME STATEMENT LOCATIONS (Details) false false R32.htm 009040 - Disclosure - CREDIT FACILITIES AND SHORT (Details) Sheet http://oneokpartners.com/role/CreditFacilitiesAndShortDetails CREDIT FACILITIES AND SHORT (Details) false false R33.htm 009050 - Disclosure - LONG-TERM DEBT (Details) Sheet http://oneokpartners.com/role/LongTermDebtDetails LONG-TERM DEBT (Details) false false R34.htm 009060 - Disclosure - EQUITY (Details) Sheet http://oneokpartners.com/role/EquityDetails EQUITY (Details) false false R35.htm 009070 - Disclosure - LIMITED PARTNERS' NET INCOME PER UNIT (Details) Sheet http://oneokpartners.com/role/LimitedPartnersNetIncomePerUnitDetails LIMITED PARTNERS' NET INCOME PER UNIT (Details) false false R36.htm 009080 - Disclosure - UNCONSOLIDATED AFFILIATES (Details) Sheet http://oneokpartners.com/role/UnconsolidatedAffiliatesDetails UNCONSOLIDATED AFFILIATES (Details) false false R37.htm 009090 - Disclosure - RELATED-PARTY TRANSACTIONS (Details) Sheet http://oneokpartners.com/role/RelatedPartyTransactionsDetails RELATED-PARTY TRANSACTIONS (Details) false false R38.htm 009100 - Disclosure - COMMITMENTS AND CONTINGENCIES (Details) Sheet http://oneokpartners.com/role/CommitmentsAndContingenciesDetails COMMITMENTS AND CONTINGENCIES (Details) false false R39.htm 009110 - Disclosure - SEGMENTS (Details) Sheet http://oneokpartners.com/role/SegmentsDetails SEGMENTS (Details) false false R40.htm 009120 - Disclosure - SUPPLEMENTAL CONDENSED CONSOLIDATING FINANCIAL INFORMATION (Details) Sheet http://oneokpartners.com/role/SupplementalCondensedConsolidatingFinancialInformationDetails SUPPLEMENTAL CONDENSED CONSOLIDATING FINANCIAL INFORMATION (Details) false false All Reports Book All Reports Element us-gaap_CostOfRevenue had a mix of decimals attribute values: -3 -5. Element oks_OperationsAndMaintenance had a mix of decimals attribute values: -3 -5. Element oks_GeneralTaxes had a mix of decimals attribute values: -3 -5. Element us-gaap_OperatingExpenses had a mix of decimals attribute values: -3 -5. Element us-gaap_PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity had a mix of decimals attribute values: -3 -5. Element us-gaap_InterestExpense had a mix of decimals attribute values: -3 -5. Element us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest had a mix of decimals attribute values: -3 -5. Element us-gaap_IncomeTaxExpenseBenefit had a mix of decimals attribute values: -3 -5. Element us-gaap_NetIncomeLossAttributableToNoncontrollingInterest had a mix of decimals attribute values: -3 -5. Element us-gaap_NetIncomeLoss had a mix of decimals attribute values: -3 -5. Element us-gaap_NetIncomeLoss had a mix of decimals attribute values: -3 -5. Element us-gaap_CashAndCashEquivalentsAtCarryingValue had a mix of decimals attribute values: -3 -5. Element us-gaap_ReceivablesNetCurrent had a mix of decimals attribute values: -3 -5. Element us-gaap_DueFromRelatedPartiesCurrent had a mix of decimals attribute values: -3 -5. Element us-gaap_InventoryNet had a mix of decimals attribute values: -3 -5. Element oks_CommodityExchangesAndImbalances had a mix of decimals attribute values: -3 -5. Element us-gaap_OtherAssetsCurrent had a mix of decimals attribute values: -3 -5. Element us-gaap_AssetsCurrent had a mix of decimals attribute values: -3 -5. Element us-gaap_PropertyPlantAndEquipmentGross had a mix of decimals attribute values: -3 -5. Element us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment had a mix of decimals attribute values: -3 -5. Element us-gaap_PropertyPlantAndEquipmentNet had a mix of decimals attribute values: -3 -5. Element oks_GoodwillAndIntangibleAssets had a mix of decimals attribute values: -3 -5. Element us-gaap_OtherAssetsNoncurrent had a mix of decimals attribute values: -3 -5. Element oks_TotalInvestmentsAndOtherAssets had a mix of decimals attribute values: -3 -5. Element us-gaap_LongTermDebtCurrent had a mix of decimals attribute values: -3 -5. Element us-gaap_ShortTermBankLoansAndNotesPayable had a mix of decimals attribute values: -3 -5. Element us-gaap_AccountsPayableCurrent had a mix of decimals attribute values: -3 -5. Element us-gaap_DueToRelatedPartiesCurrent had a mix of decimals attribute values: -3 -5. Element oks_CommodityExchangesAndImbalancesLiabilities had a mix of decimals attribute values: -3 -5. Element us-gaap_OtherLiabilitiesCurrent had a mix of decimals attribute values: -3 -5. Element us-gaap_LiabilitiesCurrent had a mix of decimals attribute values: -3 -5. Element us-gaap_LongTermDebtNoncurrent had a mix of decimals attribute values: -3 -5. Element us-gaap_StockholdersEquity had a mix of decimals attribute values: -3 -5. Element us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest had a mix of decimals attribute values: -3 -5. Element us-gaap_LiabilitiesAndStockholdersEquity had a mix of decimals attribute values: -3 -5. Element us-gaap_PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity had a mix of decimals attribute values: -3 -5. Element us-gaap_NetCashProvidedByUsedInOperatingActivities had a mix of decimals attribute values: -3 -5. Element us-gaap_PaymentsToAcquireOtherInvestments had a mix of decimals attribute values: -3 -5. Element oks_Equitymethodinvestmentdividendsordistributionsreturnofinvestment had a mix of decimals attribute values: -3 -5. Element us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment had a mix of decimals attribute values: -3 -5. Element us-gaap_NetCashProvidedByUsedInInvestingActivities had a mix of decimals attribute values: -3 -5. Element us-gaap_PaymentsOfDividends had a mix of decimals attribute values: -3 -5. Element us-gaap_PaymentsOfDividendsMinorityInterest had a mix of decimals attribute values: -3 -5. Element us-gaap_ProceedsFromShortTermDebtMaturingInThreeMonthsOrLess had a mix of decimals attribute values: -3 -5. Element us-gaap_ProceedsFromIssuanceOfLongTermDebt had a mix of decimals attribute values: -3 -5. Element us-gaap_PaymentsOfFinancingCosts had a mix of decimals attribute values: -3 -5. Element us-gaap_RepaymentsOfLongTermDebt had a mix of decimals attribute values: -3 -5. Element us-gaap_ProceedsFromIssuanceOfCommonLimitedPartnersUnits had a mix of decimals attribute values: -3 -5. Element us-gaap_ProceedsFromOtherEquity had a mix of decimals attribute values: -3 -5. Element us-gaap_NetCashProvidedByUsedInFinancingActivities had a mix of decimals attribute values: -3 -5. Element us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease had a mix of decimals attribute values: -3 -5. Element us-gaap_CashAndCashEquivalentsAtCarryingValue had a mix of decimals attribute values: -3 -5. Element us-gaap_CashAndCashEquivalentsAtCarryingValue had a mix of decimals attribute values: -3 -5. Element invest_DerivativeNonmonetaryNotionalAmount had a mix of decimals attribute values: 1 0. Element us-gaap_CashAndCashEquivalentsAtCarryingValue had a mix of decimals attribute values: -3 -5. Element us-gaap_DebtInstrumentInterestRateStatedPercentage had a mix of decimals attribute values: 5 4. Element us-gaap_CostOfRevenue had a mix of decimals attribute values: -3 -5. Element oks_OperationsAndMaintenance had a mix of decimals attribute values: -3 -5. Element oks_GeneralTaxes had a mix of decimals attribute values: -3 -5. Element us-gaap_OperatingExpenses had a mix of decimals attribute values: -3 -5. Element us-gaap_PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity had a mix of decimals attribute values: -3 -5. Element us-gaap_InterestExpense had a mix of decimals attribute values: -3 -5. Element us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest had a mix of decimals attribute values: -3 -5. Element us-gaap_IncomeTaxExpenseBenefit had a mix of decimals attribute values: -3 -5. Element us-gaap_NetIncomeLossAttributableToNoncontrollingInterest had a mix of decimals attribute values: -3 -5. Element us-gaap_NetIncomeLoss had a mix of decimals attribute values: -3 -5. Element us-gaap_CashAndCashEquivalentsAtCarryingValue had a mix of decimals attribute values: -3 -5. Element us-gaap_ReceivablesNetCurrent had a mix of decimals attribute values: -3 -5. Element us-gaap_DueFromRelatedPartiesCurrent had a mix of decimals attribute values: -3 -5. Element us-gaap_InventoryNet had a mix of decimals attribute values: -3 -5. Element oks_CommodityExchangesAndImbalances had a mix of decimals attribute values: -3 -5. Element us-gaap_OtherAssetsCurrent had a mix of decimals attribute values: -3 -5. Element us-gaap_AssetsCurrent had a mix of decimals attribute values: -3 -5. Element us-gaap_PropertyPlantAndEquipmentGross had a mix of decimals attribute values: -3 -5. Element us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment had a mix of decimals attribute values: -3 -5. Element us-gaap_PropertyPlantAndEquipmentNet had a mix of decimals attribute values: -3 -5. Element oks_GoodwillAndIntangibleAssets had a mix of decimals attribute values: -3 -5. Element us-gaap_OtherAssetsNoncurrent had a mix of decimals attribute values: -3 -5. Element oks_TotalInvestmentsAndOtherAssets had a mix of decimals attribute values: -3 -5. Element us-gaap_LongTermDebtCurrent had a mix of decimals attribute values: -3 -5. Element us-gaap_ShortTermBankLoansAndNotesPayable had a mix of decimals attribute values: -3 -5. Element us-gaap_AccountsPayableCurrent had a mix of decimals attribute values: -3 -5. Element us-gaap_DueToRelatedPartiesCurrent had a mix of decimals attribute values: -3 -5. Element oks_CommodityExchangesAndImbalancesLiabilities had a mix of decimals attribute values: -3 -5. Element us-gaap_OtherLiabilitiesCurrent had a mix of decimals attribute values: -3 -5. Element us-gaap_LiabilitiesCurrent had a mix of decimals attribute values: -3 -5. Element us-gaap_LongTermDebtNoncurrent had a mix of decimals attribute values: -3 -5. Element us-gaap_StockholdersEquity had a mix of decimals attribute values: -3 -5. Element us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest had a mix of decimals attribute values: -3 -5. Element us-gaap_LiabilitiesAndStockholdersEquity had a mix of decimals attribute values: -3 -5. Element us-gaap_NetCashProvidedByUsedInOperatingActivities had a mix of decimals attribute values: -3 -5. Element us-gaap_PaymentsToAcquireOtherInvestments had a mix of decimals attribute values: -3 -5. Element oks_Equitymethodinvestmentdividendsordistributionsreturnofinvestment had a mix of decimals attribute values: -3 -5. Element us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment had a mix of decimals attribute values: -3 -5. Element us-gaap_NetCashProvidedByUsedInInvestingActivities had a mix of decimals attribute values: -3 -5. Element us-gaap_PaymentsOfDividends had a mix of decimals attribute values: -3 -5. Element us-gaap_PaymentsOfDividendsMinorityInterest had a mix of decimals attribute values: -3 -5. Element us-gaap_ProceedsFromShortTermDebtMaturingInThreeMonthsOrLess had a mix of decimals attribute values: -3 -5. Element us-gaap_ProceedsFromIssuanceOfCommonLimitedPartnersUnits had a mix of decimals attribute values: -3 -5. Element us-gaap_ProceedsFromIssuanceOfLongTermDebt had a mix of decimals attribute values: -3 -5. Element us-gaap_PaymentsOfFinancingCosts had a mix of decimals attribute values: -3 -5. Element us-gaap_RepaymentsOfLongTermDebt had a mix of decimals attribute values: -3 -5. Element us-gaap_ProceedsFromOtherEquity had a mix of decimals attribute values: -3 -5. Element us-gaap_NetCashProvidedByUsedInFinancingActivities had a mix of decimals attribute values: -3 -5. Element us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease had a mix of decimals attribute values: -3 -5. Element us-gaap_CashAndCashEquivalentsAtCarryingValue had a mix of decimals attribute values: -3 -5. Element us-gaap_CashAndCashEquivalentsAtCarryingValue had a mix of decimals attribute values: -3 -5. 'Monetary' elements on report '002000 - Statement - CONSOLIDATED BALANCE SHEETS' had a mix of different decimal attribute values. 'Monetary' elements on report '009030 - Disclosure - RISK MANAGEMENT AND HEDGING ACTIVITIES USING DERIVATIVES (Details)' had a mix of different decimal attribute values. 'Monetary' elements on report '009031 - Disclosure - RISK MANAGEMENT AND HEDGING ACTIVITIES USING DERIVATIVES, BY INCOME STATEMENT LOCATIONS (Details)' had a mix of different decimal attribute values. 'Monetary' elements on report '009040 - Disclosure - CREDIT FACILITIES AND SHORT (Details)' had a mix of different decimal attribute values. 'Monetary' elements on report '009050 - Disclosure - LONG-TERM DEBT (Details)' had a mix of different decimal attribute values. 'Monetary' elements on report '009080 - Disclosure - UNCONSOLIDATED AFFILIATES (Details)' had a mix of different decimal attribute values. 'Monetary' elements on report '009090 - Disclosure - RELATED-PARTY TRANSACTIONS (Details)' had a mix of different decimal attribute values. 'Monetary' elements on report '009120 - Disclosure - SUPPLEMENTAL CONDENSED CONSOLIDATING FINANCIAL INFORMATION (Details)' had a mix of different decimal attribute values. Process Flow-Through: 001000 - Statement - CONSOLIDATED STATEMENTS OF INCOME Process Flow-Through: 002000 - Statement - CONSOLIDATED BALANCE SHEETS Process Flow-Through: Removing column 'Sep. 30, 2010' Process Flow-Through: Removing column 'Dec. 31, 2009' Process Flow-Through: 002010 - Statement - CONSOLIDATED BALANCE SHEETS (Parenthetical) Process Flow-Through: 003000 - Statement - CONSOLIDATED STATEMENTS OF CASH FLOWS Process Flow-Through: 005000 - Statement - CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME oks-20110930.xml oks-20110930.xsd oks-20110930_cal.xml oks-20110930_def.xml oks-20110930_lab.xml oks-20110930_pre.xml true true