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Element us-gaap_SecuritiesReceivedAsCollateral had a mix of decimals attribute values: -6 -3. Element us-gaap_SecuritizedRegulatoryTransitionAssetsNoncurrent had a mix of decimals attribute values: -8 -6 -3. Element us-gaap_SeveranceCosts1 had a mix of decimals attribute values: -6 -3. Element us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod had a mix of decimals attribute values: -3 0. Element us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber had a mix of decimals attribute values: -3 0. Element us-gaap_SpentNuclearFuelObligationNoncurrent had a mix of decimals attribute values: -6 -3. Element us-gaap_StockholdersEquity had a mix of decimals attribute values: -6 -3. Element us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest had a mix of decimals attribute values: -6 -3. 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Element us-gaap_UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions had a mix of decimals attribute values: -6 -3. Element us-gaap_UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions had a mix of decimals attribute values: -6 -3. Element us-gaap_UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations had a mix of decimals attribute values: -6 -3. Element us-gaap_UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate had a mix of decimals attribute values: -6 -3. Element us-gaap_UnsecuredDebt had a mix of decimals attribute values: -6 -3. Element us-gaap_UtilitiesOperatingExpenseDepreciationAndAmortization had a mix of decimals attribute values: -6 -3. Element us-gaap_UtilitiesOperatingExpenseMaintenance had a mix of decimals attribute values: -6 -3. Element us-gaap_UtilitiesOperatingExpenseOperations had a mix of decimals attribute values: -6 -3. Element us-gaap_VariableInterestEntityConsolidatedCarryingAmountAssets had a mix of decimals attribute values: -6 -3. Element us-gaap_VariableInterestEntityEntityMaximumLossExposureAmount had a mix of decimals attribute values: -6 -3. 'Monetary' elements on report '1001000 - Statement - Consolidated Statements of Income' had a mix of different decimal attribute values. 'Monetary' elements on report '1002000 - Statement - Consolidated Statements of Comprehensive Income (Loss)' had a mix of different decimal attribute values. 'Monetary' elements on report '1002501 - Statement - Consolidated Statements of Comprehensive Income (Loss) (Parenthetical)' had a mix of different decimal attribute values. 'Monetary' elements on report '1003000 - Statement - Condensed Consolidated Statements of Changes in Equity' had a mix of different decimal attribute values. 'Monetary' elements on report '1004000 - Statement - Consolidated Balance Sheets' had a mix of different decimal attribute values. 'Monetary' elements on report '1004501 - Statement - Consolidated Balance Sheets (Parenthetical)' had a mix of different decimal attribute values. Columns in Cash Flows statement 'Consolidated Statements of Cash Flows (USD $)' have maximum duration 365 days and at least 265 values. Shorter duration columns must have at least one fourth (66) as many values. Column '1/1/2013 - 3/31/2013' is shorter (89 days) and has only 12 values, so it is being removed. Columns in Cash Flows statement 'Consolidated Statements of Cash Flows (USD $)' have maximum duration 365 days and at least 265 values. Shorter duration columns must have at least one fourth (66) as many values. Column '4/1/2013 - 6/30/2013' is shorter (90 days) and has only 6 values, so it is being removed. Columns in Cash Flows statement 'Consolidated Statements of Cash Flows (USD $)' have maximum duration 365 days and at least 265 values. Shorter duration columns must have at least one fourth (66) as many values. Column '7/1/2013 - 9/30/2013' is shorter (91 days) and has only 6 values, so it is being removed. Columns in Cash Flows statement 'Consolidated Statements of Cash Flows (USD $)' have maximum duration 365 days and at least 265 values. Shorter duration columns must have at least one fourth (66) as many values. Column '10/1/2013 - 12/31/2013' is shorter (91 days) and has only 14 values, so it is being removed. Columns in Cash Flows statement 'Consolidated Statements of Cash Flows (USD $)' have maximum duration 365 days and at least 265 values. Shorter duration columns must have at least one fourth (66) as many values. Column '1/1/2014 - 3/31/2014' is shorter (89 days) and has only 12 values, so it is being removed. Columns in Cash Flows statement 'Consolidated Statements of Cash Flows (USD $)' have maximum duration 365 days and at least 265 values. Shorter duration columns must have at least one fourth (66) as many values. Column '4/1/2014 - 6/30/2014' is shorter (90 days) and has only 6 values, so it is being removed. Columns in Cash Flows statement 'Consolidated Statements of Cash Flows (USD $)' have maximum duration 365 days and at least 265 values. Shorter duration columns must have at least one fourth (66) as many values. Column '7/1/2014 - 9/30/2014' is shorter (91 days) and has only 6 values, so it is being removed. Columns in Cash Flows statement 'Consolidated Statements of Cash Flows (USD $)' have maximum duration 365 days and at least 265 values. Shorter duration columns must have at least one fourth (66) as many values. Column '10/1/2014 - 12/31/2014' is shorter (91 days) and has only 14 values, so it is being removed. 'Monetary' elements on report '1005000 - Statement - Consolidated Statements of Cash Flows' had a mix of different decimal attribute values. 'Monetary' elements on report '2401403 - Disclosure - Organization and Summary of Significant Accounting Policies (Details)' had a mix of different decimal attribute values. 'Monetary' elements on report '2403402 - Disclosure - Comprehensive Income (Details)' had a mix of different decimal attribute values. 'Monetary' elements on report '2404402 - Disclosure - Rate Matters - East Companies (Details)' had a mix of different decimal attribute values. 'Monetary' elements on report '2404403 - Disclosure - Rate Matters - West Companies (Details)' had a mix of different decimal attribute values. 'Monetary' elements on report '2406402 - Disclosure - Commitments, Guarantees and Contingencies (Details)' had a mix of different decimal attribute values. 'Monetary' elements on report '2407402 - Disclosure - Acquisitions, Dispositions Impairments (Details)' had a mix of different decimal attribute values. 'Monetary' elements on report '2409402 - Disclosure - Business Segments (Details)' had a mix of different decimal attribute values. 'Monetary' elements on report '2410403 - Disclosure - Derivatives and Hedging (Details)' had a mix of different decimal attribute values. 'Monetary' elements on report '2411403 - Disclosure - Fair Value Financial Assets Liabilities (Details)' had a mix of different decimal attribute values. 'Monetary' elements on report '2411404 - Disclosure - Fair Value Long-term Debt, Other Temporary Investments, Nuclear Trusts (Details)' had a mix of different decimal attribute values. 'Monetary' elements on report '2412403 - Disclosure - Income Taxes (Details)' had a mix of different decimal attribute values. 'Monetary' elements on report '2413403 - Disclosure - Leases (Details)' had a mix of different decimal attribute values. 'Monetary' elements on report '2414402 - Disclosure - Financing Activities (Details)' had a mix of different decimal attribute values. 'Monetary' elements on report '2415403 - Disclosure - Stock-Based Compensation (Details)' had a mix of different decimal attribute values. 'Monetary' elements on report '2416403 - Disclosure - Related Party Transactions (Details)' had a mix of different decimal attribute values. 'Monetary' elements on report '2417403 - Disclosure - Variable Interest Entities (Details)' had a mix of different decimal attribute values. 'Monetary' elements on report '2418403 - Disclosure - Property, Plant and Equipment (Details)' had a mix of different decimal attribute values. Process Flow-Through: 1001000 - Statement - Consolidated Statements of Income Process Flow-Through: Removing column '3 Months Ended Dec. 31, 2014' Process Flow-Through: Removing column '3 Months Ended Sep. 30, 2014' Process Flow-Through: Removing column '3 Months Ended Jun. 30, 2014' Process Flow-Through: Removing column '3 Months Ended Mar. 31, 2014' Process Flow-Through: Removing column '3 Months Ended Dec. 31, 2013' Process Flow-Through: Removing column '3 Months Ended Sep. 30, 2013' Process Flow-Through: Removing column '3 Months Ended Jun. 30, 2013' Process Flow-Through: Removing column '3 Months Ended Mar. 31, 2013' Process Flow-Through: 1002000 - Statement - Consolidated Statements of Comprehensive Income (Loss) Process Flow-Through: Removing column '3 Months Ended Dec. 31, 2014' Process Flow-Through: Removing column '3 Months Ended Sep. 30, 2014' Process Flow-Through: Removing column '3 Months Ended Jun. 30, 2014' Process Flow-Through: Removing column '3 Months Ended Mar. 31, 2014' Process Flow-Through: Removing column '3 Months Ended Dec. 31, 2013' Process Flow-Through: Removing column '3 Months Ended Sep. 30, 2013' Process Flow-Through: Removing column '3 Months Ended Jun. 30, 2013' Process Flow-Through: Removing column '3 Months Ended Mar. 31, 2013' Process Flow-Through: 1002501 - Statement - Consolidated Statements of Comprehensive Income (Loss) (Parenthetical) Process Flow-Through: 1003501 - Statement - Condensed Consolidated Statements of Changes in Equity (Parenthetical) Process Flow-Through: 1004000 - Statement - Consolidated Balance Sheets Process Flow-Through: Removing column 'Dec. 31, 2012' Process Flow-Through: Removing column 'Dec. 31, 2011' Process Flow-Through: 1004501 - Statement - Consolidated Balance Sheets (Parenthetical) Process Flow-Through: Removing column 'Dec. 31, 2012' Process Flow-Through: Removing column 'Dec. 31, 2011' Process Flow-Through: 1005000 - Statement - Consolidated Statements of Cash Flows aep-20141231.xml aep-20141231.xsd aep-20141231_cal.xml aep-20141231_def.xml aep-20141231_lab.xml aep-20141231_pre.xml true true