3.22.1 html 70 167 1 true 24 0 false 7 false false R1.htm 100000 - Document - Document And Entity Information Sheet http://www.odec.com/20220331/taxonomy/role/DocumentDocumentAndEntityInformation Document And Entity Information Cover 1 false false R2.htm 100010 - Statement - Condensed Consolidated Balance Sheets Sheet http://www.odec.com/20220331/taxonomy/role/StatementCondensedConsolidatedBalanceSheets Condensed Consolidated Balance Sheets Statements 2 false false R3.htm 100020 - Statement - Condensed Consolidated Statements Of Revenues, Expenses, And Patronage Capital (Unaudited) Sheet http://www.odec.com/20220331/taxonomy/role/StatementCondensedConsolidatedStatementsOfRevenuesExpensesAndPatronageCapitalUnaudited Condensed Consolidated Statements Of Revenues, Expenses, And Patronage Capital (Unaudited) Statements 3 false false R4.htm 100030 - Statement - Condensed Consolidated Statements Of Cash Flows (Unaudited) Sheet http://www.odec.com/20220331/taxonomy/role/StatementCondensedConsolidatedStatementsOfCashFlowsUnaudited Condensed Consolidated Statements Of Cash Flows (Unaudited) Statements 4 false false R5.htm 100040 - Disclosure - General Sheet http://www.odec.com/20220331/taxonomy/role/DisclosureGeneral General Notes 5 false false R6.htm 100050 - Disclosure - Fair Value Measurements Sheet http://www.odec.com/20220331/taxonomy/role/DisclosureFairValueMeasurements Fair Value Measurements Notes 6 false false R7.htm 100060 - Disclosure - Derivatives And Hedging Sheet http://www.odec.com/20220331/taxonomy/role/DisclosureDerivativesAndHedging Derivatives And Hedging Notes 7 false false R8.htm 100070 - Disclosure - Investments Sheet http://www.odec.com/20220331/taxonomy/role/DisclosureInvestments Investments Notes 8 false false R9.htm 100080 - Disclosure - Other Sheet http://www.odec.com/20220331/taxonomy/role/DisclosureOther Other Notes 9 false false R10.htm 100090 - Disclosure - New Accounting Pronouncements Sheet http://www.odec.com/20220331/taxonomy/role/DisclosureNewAccountingPronouncements New Accounting Pronouncements Notes 10 false false R11.htm 100100 - Disclosure - Fair Value Measurements (Tables) Sheet http://www.odec.com/20220331/taxonomy/role/DisclosureFairValueMeasurementsTables Fair Value Measurements (Tables) Tables http://www.odec.com/20220331/taxonomy/role/DisclosureFairValueMeasurements 11 false false R12.htm 100110 - Disclosure - Derivatives And Hedging (Tables) Sheet http://www.odec.com/20220331/taxonomy/role/DisclosureDerivativesAndHedgingTables Derivatives And Hedging (Tables) Tables http://www.odec.com/20220331/taxonomy/role/DisclosureDerivativesAndHedging 12 false false R13.htm 100120 - Disclosure - Investments (Tables) Sheet http://www.odec.com/20220331/taxonomy/role/DisclosureInvestmentsTables Investments (Tables) Tables http://www.odec.com/20220331/taxonomy/role/DisclosureInvestments 13 false false R14.htm 100130 - Disclosure - Other (Tables) Sheet http://www.odec.com/20220331/taxonomy/role/DisclosureOtherTables Other (Tables) Tables http://www.odec.com/20220331/taxonomy/role/DisclosureOther 14 false false R15.htm 100140 - Disclosure - General - Additional Information (Details) Sheet http://www.odec.com/20220331/taxonomy/role/DisclosureGeneralAdditionalInformationDetails General - Additional Information (Details) Details 15 false false R16.htm 100150 - Disclosure - Fair Value Measurements (Financial Assets And Liabilities Measured At Fair Value On A Recurring Basis) (Details) Sheet http://www.odec.com/20220331/taxonomy/role/DisclosureFairValueMeasurementsFinancialAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisDetails Fair Value Measurements (Financial Assets And Liabilities Measured At Fair Value On A Recurring Basis) (Details) Details http://www.odec.com/20220331/taxonomy/role/DisclosureFairValueMeasurementsTables 16 false false R17.htm 100160 - Disclosure - Derivatives And Hedging (Schedule Of Outstanding Derivative Instruments) (Details) Sheet http://www.odec.com/20220331/taxonomy/role/DisclosureDerivativesAndHedgingScheduleOfOutstandingDerivativeInstrumentsDetails Derivatives And Hedging (Schedule Of Outstanding Derivative Instruments) (Details) Details http://www.odec.com/20220331/taxonomy/role/DisclosureDerivativesAndHedgingTables 17 false false R18.htm 100170 - Disclosure - Derivatives And Hedging (Schedule Of Fair Value Of Derivative Instruments) (Details) Sheet http://www.odec.com/20220331/taxonomy/role/DisclosureDerivativesAndHedgingScheduleOfFairValueOfDerivativeInstrumentsDetails Derivatives And Hedging (Schedule Of Fair Value Of Derivative Instruments) (Details) Details http://www.odec.com/20220331/taxonomy/role/DisclosureDerivativesAndHedgingTables 18 false false R19.htm 100180 - Disclosure - Derivatives And Hedging (Schedule Of Derivative Instruments On The Statement Of Revenues, Expenses, And Patronage Capital) (Details) Sheet http://www.odec.com/20220331/taxonomy/role/DisclosureDerivativesAndHedgingScheduleOfDerivativeInstrumentsOnTheStatementOfRevenuesExpensesAndPatronageCapitalDetails Derivatives And Hedging (Schedule Of Derivative Instruments On The Statement Of Revenues, Expenses, And Patronage Capital) (Details) Details http://www.odec.com/20220331/taxonomy/role/DisclosureDerivativesAndHedgingTables 19 false false R20.htm 100190 - Disclosure - Investments (Schedule Of Investments) (Details) Sheet http://www.odec.com/20220331/taxonomy/role/DisclosureInvestmentsScheduleOfInvestmentsDetails Investments (Schedule Of Investments) (Details) Details http://www.odec.com/20220331/taxonomy/role/DisclosureInvestmentsTables 20 false false R21.htm 100200 - Disclosure - Investments (Schedule Of Contractual Maturities Of Debt Securities) (Details) Sheet http://www.odec.com/20220331/taxonomy/role/DisclosureInvestmentsScheduleOfContractualMaturitiesOfDebtSecuritiesDetails Investments (Schedule Of Contractual Maturities Of Debt Securities) (Details) Details http://www.odec.com/20220331/taxonomy/role/DisclosureInvestmentsTables 21 false false R22.htm 100210 - Disclosure - Other - Additional Information (Details) Sheet http://www.odec.com/20220331/taxonomy/role/DisclosureOtherAdditionalInformationDetails Other - Additional Information (Details) Details 22 false false R23.htm 100220 - Disclosure - Other - (Schedule of Operating Revenues) (Details) Sheet http://www.odec.com/20220331/taxonomy/role/DisclosureOtherScheduleOfOperatingRevenuesDetails Other - (Schedule of Operating Revenues) (Details) Details 23 false false All Reports Book All Reports cik885568-10q_20220331.htm cik885568-20220331.xsd cik885568-20220331_cal.xml cik885568-20220331_def.xml cik885568-20220331_lab.xml cik885568-20220331_pre.xml cik885568-ex311_6.htm cik885568-ex312_8.htm cik885568-ex321_7.htm cik885568-ex322_9.htm http://fasb.org/us-gaap/2021-01-31 http://xbrl.sec.gov/dei/2021q4 true true