0000001 - Document - Cover link:presentationLink link:calculationLink link:definitionLink 0000002 - Document - Audit Information link:presentationLink link:calculationLink link:definitionLink 9952151 - Statement - CONSOLIDATED STATEMENTS OF INCOME link:presentationLink link:calculationLink link:definitionLink 9952152 - Statement - CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) link:presentationLink link:calculationLink link:definitionLink 9952153 - Statement - CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 9952154 - Statement - CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - Calc Fix link:presentationLink link:calculationLink link:definitionLink 9952155 - Statement - CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY link:presentationLink link:calculationLink link:definitionLink 9952156 - Statement - CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 9952157 - Statement - CONSOLIDATED BALANCE SHEETS link:presentationLink link:calculationLink link:definitionLink 9952158 - Statement - CONSOLIDATED BALANCE SHEETS (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 9952159 - Statement - CONSOLIDATED STATEMENTS OF CASH FLOWS link:presentationLink link:calculationLink link:definitionLink 9952160 - Statement - CONSOLIDATED STATEMENTS OF INCOME - AEP Texas link:presentationLink link:calculationLink link:definitionLink 9952161 - Statement - CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - AEP Texas link:presentationLink link:calculationLink link:definitionLink 9952162 - Statement - CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - AEP Texas (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 9952163 - Statement - CONSOLIDATED STATEMENTS OF CHANGES IN COMMON SHAREHOLDER’S EQUITY - AEP Texas link:presentationLink link:calculationLink link:definitionLink 9952164 - Statement - CONSOLIDATED BALANCE SHEETS - 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APCo link:presentationLink link:calculationLink link:definitionLink 9952172 - Statement - CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - APCo link:presentationLink link:calculationLink link:definitionLink 9952173 - Statement - CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - APCo (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 9952174 - Statement - CONSOLIDATED STATEMENTS OF CHANGES IN COMMON SHAREHOLDER’S EQUITY - APCo link:presentationLink link:calculationLink link:definitionLink 9952175 - Statement - CONSOLIDATED BALANCE SHEETS - APCo link:presentationLink link:calculationLink link:definitionLink 9952176 - Statement - CONSOLIDATED BALANCE SHEETS - APCo (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 9952177 - Statement - CONSOLIDATED STATEMENTS OF CASH FLOWS - APCo link:presentationLink link:calculationLink link:definitionLink 9952178 - Statement - CONSOLIDATED STATEMENTS OF INCOME - I&M link:presentationLink link:calculationLink link:definitionLink 9952179 - Statement - CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - I&M link:presentationLink link:calculationLink link:definitionLink 9952180 - Statement - CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - I&M (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 9952181 - Statement - CONSOLIDATED STATEMENTS OF CHANGES IN COMMON SHAREHOLDER’S EQUITY - I&M link:presentationLink link:calculationLink link:definitionLink 9952182 - Statement - CONSOLIDATED BALANCE SHEETS - I&M link:presentationLink link:calculationLink link:definitionLink 9952183 - Statement - CONSOLIDATED BALANCE SHEETS - I&M (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 9952184 - Statement - CONSOLIDATED STATEMENTS OF CASH FLOWS - I&M link:presentationLink link:calculationLink link:definitionLink 9952185 - Statement - CONSOLIDATED STATEMENTS OF INCOME - OPCo link:presentationLink link:calculationLink link:definitionLink 9952186 - Statement - CONSOLIDATED STATEMENTS OF CHANGES IN COMMON SHAREHOLDER’S EQUITY - 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Statement - BALANCE SHEETS - PSO link:presentationLink link:calculationLink link:definitionLink 9952195 - Statement - BALANCE SHEETS - PSO (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 9952196 - Statement - STATEMENTS OF CASH FLOWS - PSO link:presentationLink link:calculationLink link:definitionLink 9952197 - Statement - CONSOLIDATED STATEMENTS OF INCOME - SWEPCo link:presentationLink link:calculationLink link:definitionLink 9952198 - Statement - CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - SWEPCo link:presentationLink link:calculationLink link:definitionLink 9952199 - Statement - CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - SWEPCo (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 9952200 - Statement - CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY - SWEPCo link:presentationLink link:calculationLink link:definitionLink 9952201 - Statement - CONSOLIDATED BALANCE SHEETS - SWEPCo link:presentationLink link:calculationLink link:definitionLink 9952202 - 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Disclosure - BENEFIT PLANS link:presentationLink link:calculationLink link:definitionLink 9952212 - Disclosure - BUSINESS SEGMENTS link:presentationLink link:calculationLink link:definitionLink 9952213 - Disclosure - DERIVATIVES AND HEDGING link:presentationLink link:calculationLink link:definitionLink 9952214 - Disclosure - FAIR VALUE MEASUREMENTS link:presentationLink link:calculationLink link:definitionLink 9952215 - Disclosure - INCOME TAXES link:presentationLink link:calculationLink link:definitionLink 9952216 - Disclosure - LEASES link:presentationLink link:calculationLink link:definitionLink 9952217 - Disclosure - VOLUNTARY SEVERANCE PROGRAM link:presentationLink link:calculationLink link:definitionLink 9952218 - Disclosure - FINANCING ACTIVITIES link:presentationLink link:calculationLink link:definitionLink 9952219 - Disclosure - STOCK-BASED COMPENSATION link:presentationLink link:calculationLink link:definitionLink 9952220 - Disclosure - RELATED PARTY TRANSACTIONS link:presentationLink link:calculationLink link:definitionLink 9952221 - Disclosure - VARIABLE INTEREST ENTITIES AND EQUITY METHOD INVESTMENTS link:presentationLink link:calculationLink link:definitionLink 9952222 - Disclosure - PROPERTY, PLANT AND EQUIPMENT link:presentationLink link:calculationLink link:definitionLink 9952223 - Disclosure - REVENUE FROM CONTRACTS WITH CUSTOMERS link:presentationLink link:calculationLink link:definitionLink 9952224 - Disclosure - SCHEDULE I - CONDENSED FINANCIAL INFORMATION OF PARENT COMPANY link:presentationLink link:calculationLink link:definitionLink 9952225 - Disclosure - SCHEDULE II – VALUATION AND QUALIFYING ACCOUNTS AND RESERVES link:presentationLink link:calculationLink link:definitionLink 9952226 - Disclosure - SCHEDULE I - CONDENSED FINANCIAL INFORMATION OF PARENT COMPANY - AEPTCO PARENT link:presentationLink link:calculationLink link:definitionLink 9955511 - Disclosure - ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies) link:presentationLink link:calculationLink link:definitionLink 9955512 - Disclosure - ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables) link:presentationLink link:calculationLink link:definitionLink 9955513 - Disclosure - COMPREHENSIVE INCOME (Tables) link:presentationLink link:calculationLink link:definitionLink 9955514 - Disclosure - RATE MATTERS (Tables) link:presentationLink link:calculationLink link:definitionLink 9955515 - Disclosure - EFFECTS OF REGULATION (Tables) link:presentationLink link:calculationLink link:definitionLink 9955516 - Disclosure - COMMITMENTS, GUARANTEES AND CONTINGENCIES (Tables) link:presentationLink link:calculationLink link:definitionLink 9955517 - Disclosure - ACQUISITIONS, DISPOSITIONS AND IMPAIRMENTS (Tables) link:presentationLink link:calculationLink link:definitionLink 9955518 - Disclosure - BENEFIT PLANS (Tables) link:presentationLink link:calculationLink link:definitionLink 9955519 - Disclosure - BUSINESS SEGMENTS (Tables) link:presentationLink link:calculationLink link:definitionLink 9955520 - Disclosure - DERIVATIVES AND HEDGING (Tables) link:presentationLink link:calculationLink link:definitionLink 9955521 - Disclosure - FAIR VALUE MEASUREMENTS (Tables) link:presentationLink link:calculationLink link:definitionLink 9955522 - Disclosure - INCOME TAXES (Tables) link:presentationLink link:calculationLink link:definitionLink 9955523 - Disclosure - LEASES (Tables) link:presentationLink link:calculationLink link:definitionLink 9955524 - Disclosure - VOLUNTARY SEVERANCE PROGRAM (Tables) link:presentationLink link:calculationLink link:definitionLink 9955525 - Disclosure - FINANCING ACTIVITIES (Tables) link:presentationLink link:calculationLink link:definitionLink 9955526 - Disclosure - STOCK-BASED COMPENSATION (Tables) link:presentationLink link:calculationLink link:definitionLink 9955527 - Disclosure - RELATED PARTY TRANSACTIONS (Tables) link:presentationLink link:calculationLink link:definitionLink 9955528 - Disclosure - VARIABLE INTEREST ENTITIES AND EQUITY METHOD INVESTMENTS (Tables) link:presentationLink link:calculationLink link:definitionLink 9955529 - 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Disclosure - ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Current Target Asset Allocations (Details) link:presentationLink link:calculationLink link:definitionLink 9955536 - Disclosure - ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Earnings Per Share (Details) link:presentationLink link:calculationLink link:definitionLink 9955537 - Disclosure - ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Depreciation and Amortization (Details) link:presentationLink link:calculationLink link:definitionLink 9955538 - Disclosure - ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Supplementary Cash Flow Information (Details) link:presentationLink link:calculationLink link:definitionLink 9955539 - Disclosure - COMPREHENSIVE INCOME - Schedule of Comprehensive Income (Details) link:presentationLink link:calculationLink link:definitionLink 9955540 - Disclosure - RATE MATTERS - AEP Texas Rate Matters (Details) link:presentationLink link:calculationLink link:definitionLink 9955541 - Disclosure - RATE MATTERS - APCo and WPCo Rate Matters (Details) link:presentationLink link:calculationLink link:definitionLink 9955542 - Disclosure - RATE MATTERS - Regulatory Assets Subject to Securitization (Details) link:presentationLink link:calculationLink link:definitionLink 9955543 - Disclosure - RATE MATTERS - ETT Rate Matters (Details) link:presentationLink link:calculationLink link:definitionLink 9955544 - Disclosure - RATE MATTERS - I&M Rate Matters (Details) link:presentationLink link:calculationLink link:definitionLink 9955545 - Disclosure - RATE MATTERS - KPCo Rate Matters (Details) link:presentationLink link:calculationLink link:definitionLink 9955546 - Disclosure - RATE MATTERS - OPCo Rate Matters (Details) link:presentationLink link:calculationLink link:definitionLink 9955547 - Disclosure - RATE MATTERS - PSO Rate Matters (Details) link:presentationLink link:calculationLink link:definitionLink 9955548 - Disclosure - RATE MATTERS - SWEPCo Rate Matters (Details) link:presentationLink link:calculationLink link:definitionLink 9955549 - Disclosure - RATE MATTERS - PSO and SWEPCo Rate Matters (Details) link:presentationLink link:calculationLink link:definitionLink 9955550 - Disclosure - RATE MATTERS - FERC Rate Matters (Details) link:presentationLink link:calculationLink link:definitionLink 9955551 - Disclosure - RATE MATTERS - FERC Annual Revenue Requirements (Details) link:presentationLink link:calculationLink link:definitionLink 9955552 - Disclosure - RATE MATTERS - Impact to the Statements of Income Recorded by the Registrants (Details) link:presentationLink link:calculationLink link:definitionLink 9955553 - Disclosure - EFFECTS OF REGULATION - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955554 - Disclosure - EFFECTS OF REGULATION - Regulatory Asset, Early Retirement (Details) link:presentationLink link:calculationLink link:definitionLink 9955555 - Disclosure - EFFECTS OF REGULATION - Regulatory Assets (Details) link:presentationLink link:calculationLink link:definitionLink 9955556 - Disclosure - EFFECTS OF REGULATION - Regulatory Liabilities (Details) link:presentationLink link:calculationLink link:definitionLink 9955557 - Disclosure - EFFECTS OF REGULATION - Regulatory Assets - AEP Texas (Details) link:presentationLink link:calculationLink link:definitionLink 9955558 - Disclosure - EFFECTS OF REGULATION - Regulatory Liabilities - AEP Texas (Details) link:presentationLink link:calculationLink link:definitionLink 9955559 - Disclosure - EFFECTS OF REGULATION - Regulatory Assets - AEPTCO (Details) link:presentationLink link:calculationLink link:definitionLink 9955560 - Disclosure - EFFECTS OF REGULATION - Regulatory Liabilities - AEPTCo (Details) link:presentationLink link:calculationLink link:definitionLink 9955561 - Disclosure - EFFECTS OF REGULATION - Regulatory Assets - APCo (Details) link:presentationLink link:calculationLink link:definitionLink 9955562 - Disclosure - EFFECTS OF REGULATION - Regulatory Liabilities - APCo (Details) link:presentationLink link:calculationLink link:definitionLink 9955563 - 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Disclosure - BENEFIT PLANS - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955578 - Disclosure - BENEFIT PLANS - Schedule of Defined Benefit Assumptions (Details) link:presentationLink link:calculationLink link:definitionLink 9955579 - Disclosure - BENEFIT PLANS - Schedule of Obligation and Funded Status (Details) link:presentationLink link:calculationLink link:definitionLink 9955580 - Disclosure - BENEFIT PLANS - Schedule of Amounts Included on the Balance Sheets (Details) link:presentationLink link:calculationLink link:definitionLink 9955581 - Disclosure - BENEFIT PLANS - Schedule of Amounts Included in Regulatory Assets, Deferred Income Taxes and AOCI (Details) link:presentationLink link:calculationLink link:definitionLink 9955582 - Disclosure - BENEFIT PLANS - Schedule of Pension and OPEB Assets (Details) link:presentationLink link:calculationLink link:definitionLink 9955583 - Disclosure - BENEFIT PLANS - Schedule of Assets by Fair Value (Details) link:presentationLink link:calculationLink link:definitionLink 9955584 - Disclosure - BENEFIT PLANS - Schedule of Accumulated Benefit Obligation (Details) link:presentationLink link:calculationLink link:definitionLink 9955585 - Disclosure - BENEFIT PLANS - Schedule of Obligations in Excess of Fair Values Projected Benefit Obligation (Details) link:presentationLink link:calculationLink link:definitionLink 9955586 - Disclosure - BENEFIT PLANS - Schedule of Obligations in Excess of Fair Values Accumulated Benefit Obligation (Details) link:presentationLink link:calculationLink link:definitionLink 9955587 - Disclosure - BENEFIT PLANS - Schedule of Estimated Future Benefit Payments and Contributions (Details) link:presentationLink link:calculationLink link:definitionLink 9955588 - Disclosure - BENEFIT PLANS - Schedule of Expected Benefit Payments (Details) link:presentationLink link:calculationLink link:definitionLink 9955589 - Disclosure - BENEFIT PLANS - Schedule of Components of Net Periodic Benefit Cost (Details) link:presentationLink link:calculationLink link:definitionLink 9955590 - Disclosure - BENEFIT PLANS - Schedule of Matching Contribution Costs (Details) link:presentationLink link:calculationLink link:definitionLink 9955591 - Disclosure - BUSINESS SEGMENTS - AEP's Reportable Segment Information (Details) link:presentationLink link:calculationLink link:definitionLink 9955592 - Disclosure - BUSINESS SEGMENTS - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955593 - Disclosure - BUSINESS SEGMENTS - AEPTCo's Reportable Segment Information (Details) link:presentationLink link:calculationLink link:definitionLink 9955594 - Disclosure - DERIVATIVES AND HEDGING - Schedule of the Notional Volume of Derivative Instruments (Details) link:presentationLink link:calculationLink link:definitionLink 9955595 - Disclosure - DERIVATIVES AND HEDGING - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955596 - Disclosure - DERIVATIVES AND HEDGING - Schedule of Location and Fair Value of Derivative Assets and Liabilities (Details) link:presentationLink link:calculationLink link:definitionLink 9955597 - Disclosure - DERIVATIVES AND HEDGING - Schedule of Offsetting Assets and Liabilities (Details) link:presentationLink link:calculationLink link:definitionLink 9955598 - Disclosure - DERIVATIVES AND HEDGING - Schedule of Gain (Loss) Recognized on Risk Management Contracts (Details) link:presentationLink link:calculationLink link:definitionLink 9955599 - Disclosure - DERIVATIVES AND HEDGING - Schedule of Hedged Items Recognized on the Balance Sheet (Details) link:presentationLink link:calculationLink link:definitionLink 9955600 - Disclosure - DERIVATIVES AND HEDGING - Schedule of Pretax Effects of Fair Value Hedge Accounting on Income (Details) link:presentationLink link:calculationLink link:definitionLink 9955601 - Disclosure - DERIVATIVES AND HEDGING - Schedule of Cash Flow Hedges Included in Accumulated Other Comprehensive Income (Loss) (Details) link:presentationLink link:calculationLink link:definitionLink 9955602 - Disclosure - FAIR VALUE MEASUREMENTS - Debt Fair Value (Details) link:presentationLink link:calculationLink link:definitionLink 9955603 - Disclosure - FAIR VALUE MEASUREMENTS - Fair Value of Other Temporary Investments and Cash (Details) link:presentationLink link:calculationLink link:definitionLink 9955604 - Disclosure - FAIR VALUE MEASUREMENTS - Activity for Investments (Details) link:presentationLink link:calculationLink link:definitionLink 9955605 - Disclosure - FAIR VALUE MEASUREMENTS - Summary of Nuclear Trust Investments (Details) link:presentationLink link:calculationLink link:definitionLink 9955606 - Disclosure - FAIR VALUE MEASUREMENTS - Securities Activity (Details) link:presentationLink link:calculationLink link:definitionLink 9955607 - Disclosure - FAIR VALUE MEASUREMENTS - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955608 - Disclosure - FAIR VALUE MEASUREMENTS - Fixed Income Securities Held in Nuclear Trusts (Details) link:presentationLink link:calculationLink link:definitionLink 9955609 - Disclosure - FAIR VALUE MEASUREMENTS - Fair Value of Assets and Liabilities on a Recurring Basis (Details) link:presentationLink link:calculationLink link:definitionLink 9955609 - Disclosure - FAIR VALUE MEASUREMENTS - Fair Value of Assets and Liabilities on a Recurring Basis (Details) link:presentationLink link:calculationLink link:definitionLink 9955609 - Disclosure - FAIR VALUE MEASUREMENTS - Fair Value of Assets and Liabilities on a Recurring Basis (Details) link:presentationLink link:calculationLink link:definitionLink 9955610 - Disclosure - FAIR VALUE MEASUREMENTS - Changes in Fair Value (Details) link:presentationLink link:calculationLink link:definitionLink 9955611 - Disclosure - FAIR VALUE MEASUREMENTS - Significant Unobservable Inputs (Details) link:presentationLink link:calculationLink link:definitionLink 9955612 - Disclosure - INCOME TAXES - Income Tax Expense (Benefit) (Details) link:presentationLink link:calculationLink link:definitionLink 9955613 - Disclosure - INCOME TAXES - Effective Tax Rate Reconciliation (Details) link:presentationLink link:calculationLink link:definitionLink 9955614 - Disclosure - INCOME TAXES - Income Taxes Paid (Details) link:presentationLink link:calculationLink link:definitionLink 9955615 - Disclosure - INCOME TAXES - Deferred Tax Assets and Liabilities (Details) link:presentationLink link:calculationLink link:definitionLink 9955615 - Disclosure - INCOME TAXES - Deferred Tax Assets and Liabilities (Details) link:presentationLink link:calculationLink link:definitionLink 9955616 - Disclosure - INCOME TAXES - Operating Loss Carryforwards (Details) link:presentationLink link:calculationLink link:definitionLink 9955617 - Disclosure - INCOME TAXES - Tax Credit Carryforwards (Details) link:presentationLink link:calculationLink link:definitionLink 9955618 - Disclosure - LEASES - Lease Rental Costs (Details) link:presentationLink link:calculationLink link:definitionLink 9955619 - Disclosure - LEASES - Supplemental Lease Information (Details) link:presentationLink link:calculationLink link:definitionLink 9955620 - Disclosure - LEASES - Balance Sheet Information (Details) link:presentationLink link:calculationLink link:definitionLink 9955621 - Disclosure - LEASES - Future Minimum Lease Payments (Details) link:presentationLink link:calculationLink link:definitionLink 9955621 - Disclosure - LEASES - Future Minimum Lease Payments (Details) link:presentationLink link:calculationLink link:definitionLink 9955622 - Disclosure - LEASES - Master Lease Agreements (Details) link:presentationLink link:calculationLink link:definitionLink 9955623 - Disclosure - VOLUNTARY SEVERANCE PROGRAM - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955624 - Disclosure - VOLUNTARY SEVERANCE PROGRAM - Summary From Program (Details) link:presentationLink link:calculationLink link:definitionLink 9955625 - Disclosure - FINANCING ACTIVITIES - Schedule of Common Stock Share Activity (Details) link:presentationLink link:calculationLink link:definitionLink 9955626 - Disclosure - FINANCING ACTIVITIES - ATM Offering Program Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955627 - Disclosure - FINANCING ACTIVITIES - Forward Sale of Equity Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955628 - Disclosure - FINANCING ACTIVITIES - Schedule of Long-Term Debt Information (Details) link:presentationLink link:calculationLink link:definitionLink 9955629 - Disclosure - FINANCING ACTIVITIES - Schedule of Long-Term Debt Maturities (Details) link:presentationLink link:calculationLink link:definitionLink 9955630 - Disclosure - FINANCING ACTIVITIES - Long-term Debt Subsequent Events Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955631 - Disclosure - FINANCING ACTIVITIES - Debt Covenants Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955632 - Disclosure - FINANCING ACTIVITIES - Dividend Restrictions Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955633 - Disclosure - FINANCING ACTIVITIES - Schedule of Dividend Restrictions (Details) link:presentationLink link:calculationLink link:definitionLink 9955634 - Disclosure - FINANCING ACTIVITIES - Line of Credit and Short-Term Debt Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955635 - Disclosure - FINANCING ACTIVITIES - Schedule of Short-term Debt (Details) link:presentationLink link:calculationLink link:definitionLink 9955636 - Disclosure - FINANCING ACTIVITIES - Schedule of Utility Money Pool Participants' Money Pool Activity and Authorized Borrowing Limits (Details) link:presentationLink link:calculationLink link:definitionLink 9955637 - Disclosure - FINANCING ACTIVITIES - Schedule of Nonutility Money Pool Activity (Details) link:presentationLink link:calculationLink link:definitionLink 9955638 - Disclosure - FINANCING ACTIVITIES - Schedule of Direct Borrowing Activity (Details) link:presentationLink link:calculationLink link:definitionLink 9955639 - Disclosure - FINANCING ACTIVITIES - Schedule of Maximum and Minimum Interest Rates for Funds Either Borrowed from or Loaned to Utility Money Pool (Details) link:presentationLink link:calculationLink link:definitionLink 9955640 - Disclosure - FINANCING ACTIVITIES - Schedule of Average Interest Rates for Funds Borrowed from and Loaned to Utility Money Pool (Details) link:presentationLink link:calculationLink link:definitionLink 9955641 - Disclosure - FINANCING ACTIVITIES - Schedule of Maximum, Minimum and Average Interest Rates for Funds Borrowed from and Loaned to the Nonutility Money Pool (Details) link:presentationLink link:calculationLink link:definitionLink 9955642 - Disclosure - FINANCING ACTIVITIES - Schedule of Maximum Minimum and Average Interest Rates for Funds Borrowed from and Loaned to AEP (Details) link:presentationLink link:calculationLink link:definitionLink 9955643 - Disclosure - FINANCING ACTIVITIES - Schedule of Interest Expense Incurred For Funds Borrowed from Utility Money Pool (Details) link:presentationLink link:calculationLink link:definitionLink 9955644 - Disclosure - FINANCING ACTIVITIES - Schedule of Interest Income Earned for Funds Loaned to Utility Money Pool (Details) link:presentationLink link:calculationLink link:definitionLink 9955645 - Disclosure - FINANCING ACTIVITIES - Securitized Accounts Receivables Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955646 - Disclosure - FINANCING ACTIVITIES - Schedule of Comparative Accounts Receivable Information (Details) link:presentationLink link:calculationLink link:definitionLink 9955647 - Disclosure - FINANCING ACTIVITIES - Schedule of Customer Accounts Receivable Managed Portfolio (Details) link:presentationLink link:calculationLink link:definitionLink 9955648 - Disclosure - FINANCING ACTIVITIES - Schedule of Accounts Receivable and Accrued Unbilled Revenues (Details) link:presentationLink link:calculationLink link:definitionLink 9955649 - Disclosure - FINANCING ACTIVITIES - Schedule of Fees Paid to AEP Credit for Customer Accounts Receivable Sold (Details) link:presentationLink link:calculationLink link:definitionLink 9955650 - Disclosure - FINANCING ACTIVITIES - Schedule of Proceeds on Sale of Receivables to AEP Credit (Details) link:presentationLink link:calculationLink link:definitionLink 9955651 - Disclosure - STOCK-BASED COMPENSATION - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955652 - Disclosure - STOCK-BASED COMPENSATION - Performance Shares and Reinvested Dividends (Details) link:presentationLink link:calculationLink link:definitionLink 9955653 - Disclosure - STOCK-BASED COMPENSATION - Performance Shares Earned (Details) link:presentationLink link:calculationLink link:definitionLink 9955654 - Disclosure - STOCK-BASED COMPENSATION - Performance Shares and AEP Career Shares (Details) link:presentationLink link:calculationLink link:definitionLink 9955655 - Disclosure - STOCK-BASED COMPENSATION - Performance Shares Activity (Details) link:presentationLink link:calculationLink link:definitionLink 9955656 - Disclosure - STOCK-BASED COMPENSATION - Monte Carlo Valuation (Details) link:presentationLink link:calculationLink link:definitionLink 9955657 - Disclosure - STOCK-BASED COMPENSATION - Restricted Stock Units and Unrestricted Shares (Details) link:presentationLink link:calculationLink link:definitionLink 9955658 - Disclosure - STOCK-BASED COMPENSATION - Restricted Stock Units Activity (Details) link:presentationLink link:calculationLink link:definitionLink 9955659 - Disclosure - STOCK-BASED COMPENSATION - Stock Unit Accumulation Plan for Non-Employee Directors (Details) link:presentationLink link:calculationLink link:definitionLink 9955660 - Disclosure - STOCK-BASED COMPENSATION - Share-based Compensation Plans (Details) link:presentationLink link:calculationLink link:definitionLink 9955661 - Disclosure - RELATED PARTY TRANSACTIONS - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955662 - Disclosure - RELATED PARTY TRANSACTIONS - Contributions (Details) link:presentationLink link:calculationLink link:definitionLink 9955663 - Disclosure - RELATED PARTY TRANSACTIONS - Costs Paid (Details) link:presentationLink link:calculationLink link:definitionLink 9955664 - Disclosure - RELATED PARTY TRANSACTIONS - Transmission Service Charges (Details) link:presentationLink link:calculationLink link:definitionLink 9955665 - Disclosure - RELATED PARTY TRANSACTIONS - Revenues (Details) link:presentationLink link:calculationLink link:definitionLink 9955666 - Disclosure - VARIABLE INTEREST ENTITIES AND EQUITY METHOD INVESTMENTS - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955667 - Disclosure - VARIABLE INTEREST ENTITIES AND EQUITY METHOD INVESTMENTS - VIE Consolidation (Details) link:presentationLink link:calculationLink link:definitionLink 9955668 - Disclosure - VARIABLE INTEREST ENTITIES AND EQUITY METHOD INVESTMENTS - Billings (Details) link:presentationLink link:calculationLink link:definitionLink 9955669 - Disclosure - VARIABLE INTEREST ENTITIES AND EQUITY METHOD INVESTMENTS - Investments (Details) link:presentationLink link:calculationLink link:definitionLink 9955670 - Disclosure - VARIABLE INTEREST ENTITIES AND EQUITY METHOD INVESTMENTS - Power Purchased (Details) link:presentationLink link:calculationLink link:definitionLink 9955671 - Disclosure - PROPERTY, PLANT AND EQUIPMENT - Total Plant Balances (Details) link:presentationLink link:calculationLink link:definitionLink 9955672 - Disclosure - PROPERTY, PLANT AND EQUIPMENT - Depreciation Rates and Useful Lives (Details) link:presentationLink link:calculationLink link:definitionLink 9955673 - Disclosure - PROPERTY, PLANT AND EQUIPMENT - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955674 - Disclosure - PROPERTY, PLANT AND EQUIPMENT - ARO Reconciliation (Details) link:presentationLink link:calculationLink link:definitionLink 9955675 - Disclosure - PROPERTY, PLANT AND EQUIPMENT - Allowance for Equity Funds and Borrowed Funds Used During Construction (Details) link:presentationLink link:calculationLink link:definitionLink 9955676 - Disclosure - PROPERTY, PLANT AND EQUIPMENT - Proportionate Share of Operating Costs (Details) link:presentationLink link:calculationLink link:definitionLink 9955677 - Disclosure - REVENUE FROM CONTRACTS WITH CUSTOMERS - Disaggregation of Revenue (Details) link:presentationLink link:calculationLink link:definitionLink 9955678 - Disclosure - REVENUE FROM CONTRACTS WITH CUSTOMERS - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955679 - Disclosure - REVENUE FROM CONTRACTS WITH CUSTOMERS - Performance Obligation (Details) link:presentationLink link:calculationLink link:definitionLink 9955679 - Disclosure - REVENUE FROM CONTRACTS WITH CUSTOMERS - Performance Obligation (Details) link:presentationLink link:calculationLink link:definitionLink 9955680 - Disclosure - REVENUE FROM CONTRACTS WITH CUSTOMERS - Affiliate Accounts Receivable (Details) link:presentationLink link:calculationLink link:definitionLink 9955681 - Disclosure - SCHEDULE I - CONDENSED FINANCIAL INFORMATION OF PARENT COMPANY - CONDENSED STATEMENTS OF INCOME AND COMPREHENSIVE INCOME (Details) link:presentationLink link:calculationLink link:definitionLink 9955682 - Disclosure - SCHEDULE I - CONDENSED FINANCIAL INFORMATION OF PARENT COMPANY - CONDENSED BALANCE SHEETS (Details) link:presentationLink link:calculationLink link:definitionLink 9955683 - Disclosure - SCHEDULE I - CONDENSED FINANCIAL INFORMATION OF PARENT COMPANY - CONDENSED BALANCE SHEETS ADDITIONAL INFORMATION (Details) link:presentationLink link:calculationLink link:definitionLink 9955684 - Disclosure - SCHEDULE I - CONDENSED FINANCIAL INFORMATION OF PARENT COMPANY - CONDENSED STATEMENTS OF CASH FLOWS (Details) link:presentationLink link:calculationLink link:definitionLink 9955685 - Disclosure - SCHEDULE I - CONDENSED FINANCIAL INFORMATION OF PARENT COMPANY - FINANCING ACTIVITIES - SCHEDULE OF LONG-TERM DEBT (Details) link:presentationLink link:calculationLink link:definitionLink 9955686 - Disclosure - SCHEDULE I - CONDENSED FINANCIAL INFORMATION OF PARENT COMPANY - FINANCING ACTIVITIES - SCHEDULE OF LONG-TERM DEBT OUTSTANDING (Details) link:presentationLink link:calculationLink link:definitionLink 9955687 - Disclosure - SCHEDULE I - CONDENSED FINANCIAL INFORMATION OF PARENT COMPANY - FINANCING ACTIVITIES - SCHEDULE OF SHORT-TERM DEBT (Details) link:presentationLink link:calculationLink link:definitionLink 9955688 - Disclosure - SCHEDULE I - CONDENSED FINANCIAL INFORMATION OF PARENT COMPANY - RELATED PARTY TRANSACTIONS (Details) link:presentationLink link:calculationLink link:definitionLink 9955689 - Disclosure - SCHEDULE II – VALUATION AND QUALIFYING ACCOUNTS AND RESERVES (Details) link:presentationLink link:calculationLink link:definitionLink 9955690 - Disclosure - SCHEDULE I - CONDENSED FINANCIAL INFORMATION OF PARENT COMPANY - AEPTCO PARENT - CONDENSED STATEMENTS OF INCOME (Details) link:presentationLink link:calculationLink link:definitionLink 9955691 - Disclosure - SCHEDULE I - CONDENSED FINANCIAL INFORMATION OF PARENT COMPANY - AEPTCO PARENT - CONDENSED BALANCE SHEETS (Details) link:presentationLink link:calculationLink link:definitionLink 9955692 - Disclosure - SCHEDULE I - CONDENSED FINANCIAL INFORMATION OF PARENT COMPANY - AEPTCO PARENT - CONDENSED STATEMENTS OF CASH FLOWS (Details) link:presentationLink link:calculationLink link:definitionLink 9955693 - Disclosure - SCHEDULE I - CONDENSED FINANCIAL INFORMATION OF PARENT COMPANY - AEPTCO PARENT - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) link:presentationLink link:calculationLink link:definitionLink 9955694 - Disclosure - SCHEDULE I - CONDENSED FINANCIAL INFORMATION OF PARENT COMPANY - AEPTCO PARENT - RELATED PARTY TRANSACTIONS (Details) link:presentationLink link:calculationLink link:definitionLink