Revenue from Contracts with Customers [Abstract]
Revenue from Contracts with Customers [Abstract]
Statement [Table]
Statement [Table]
Legal Entity [Axis]
Legal Entity [Axis]
Entity [Domain]
Entity [Domain]
Statement [Line Items]
Statement [Line Items]
Revenue from Contracts with Customers
Revenue from Contract with Customer [Text Block]
Debt Disclosure [Abstract]
Long-term Debt
Schedule of Debt [Table Text Block]
Long-term Debt Issuances
Long Term Debt and Other Securities Issued [Text Block]
This element may be used as a single block of text to encapsulate long-term debt and other securities issued during the period.
Retirements and Principal Payments
Schedule of Extinguishment of Debt [Table Text Block]
Utility Money Pool Participants' Money Pool Activity and Authorized Borrowing Limits
Utility Money Pool Participants Money Pool Activity And Authorized Borrowing Limits [Text Block]
Tabular disclosure of a Utility Money Pool participants' money pool activity and authorized borrowing limits including: (1) Maximum Borrowings from Utility Money Pool; (2) Maximum Loans to Utility Money Pool; (3) Average Borrowings from Utility Money Pool; (4) Average Loans to Utility Money Pool; (5) Net Loans (Borrowings) to/from Utility Money Pool as of the balance sheet date; (6) Authorized Short-term Borrowing Limit. The Utility Money Pool represents centralized funding mechanism AEP uses to meet the short-term cash requirements of certain utility subsidiaries.
Nonutility Money Pool Activity
Nonutility Money Pool Activity [Table Text Block]
Tabular disclosure of a Nonutility Money Pool participants' money pool activity including: (1) Maximum Borrowings from Nonutility Money Pool; (2) Maximum Loans to Nonutility Money Pool; (3) Average Borrowings from Nonutility Money Pool; (4) Average Loans to Nonutility Money Pool; (5) Net Loans (Borrowings) to/from Nonutility Money Pool as of the balance sheet date. The Nonutility Money Pool represents centralized funding mechanism AEP uses to meet the short-term cash requirements of certain nonutility subsidiaries.
Direct Borrowing Activity
Direct Borrowing Activity [Table Text Block]
[Table Text Block] for Tabular disclosure of the Direct borrowing participants; activity including: (1) Maximum borrowings from AEP; (2) Maximum Loans to AEP; (3) Average Borrowings from AEP; (4) Average Loans to AEP; (5) Borrowings from AEP as of the balance sheet date; (6) Loans to AEP as of the balance sheet date. Direct Borrowing represents centralized funding mechanism AEP uses to meet the short-term cash requirement of certain subsidiaries.
Maximum and Minimum Interest Rates for Funds Either Borrowed from or Loaned to Utility Money Pool
Maximum And Minimum Interest Rates For Funds Either Borrowed From Or Loaned To Utility Money Pool [Text Block]
Tabular disclosure of the maximum and minimum weighted-average interest rate, calculated on a daily basis, of funds either borrowed from or loaned to a Utility Money Pool during the period. The Utility Money Pool represents centralized funding mechanism AEP uses to meet the short-term cash requirements of certain utility subsidiaries.
Average Interest Rates for Funds Borrowed from and Loaned to Utility Money Pool
Average Interest Rates For Funds Borrowed From And Loaned To Utility Money Pool [Text Block]
Tabular disclosure of the average interest rates for funds borrowed from and loaned to a Utility Money Pool. The Utility Money Pool represents centralized funding mechanism AEP uses to meet the short-term cash requirements of certain utility subsidiaries.
Maximum Minimum Average Interest Rates for Funds Borrowed from Loaned to Nonutility Money Pool
Maximum Minimum Average Interest Rates for Funds Borrowed from Loaned to Nonutility Money Pool [Text Block]
Tabular disclosure of the maximum and minimum weighted-average interest rate, calculated on a daily basis and the average interest rates of funds borrowed from or loaned to a Nonutility Money Pool during the period.The Nonutility Money Pool represents centralized funding mechanism AEP uses to meet the short-term cash requirements of certain nonutility subsidiaries.
Maximum Minimum and Average Interest Rates for Funds Borrowed from and Loaned to AEP
Maximum Minimum and Average Interest Rates for Funds Borrowed from and Loaned to AEP [Table Text Block]
[Table Text Block] for Tabular disclosure of the maximum and minimum weighted-average interest rate, calculated on a daily basis and the average interest rates of funds borrowed from or loaned to AEP during the period. The Direct Borrowing represents centralized funding mechanism AEP uses to meet the short-term cash requirements of certain subsidiaries.
Short Term Debt
Schedule of Short-term Debt [Table Text Block]
Comparative Accounts Receivable Information
Comparative Accounts Receivable Information [Text block]
Comparative accounts receivable information.
Customer Accounts Receivable Managed Portfolio
Customer Accounts Receivable Managed Portfolio [Text Block]
Customer accounts receivable managed portfolio.
Accounts Receivable and Accrued Unbilled Revenues
Accounts Receivable and Accrued Unbilled Revenues [Text Block]
Accounts receivable and accrued unbilled revenues under the sale of receivables agreement.
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold [Text Block]
Fees paid to AEP Credit for customer accounts receivable sold.
Proceeds on Sale of Receivables to AEP Credit
Proceeds on Sale of Receivables to AEP Credit [Text Block]
Proceeds on sale of receivables to AEP Credit.
Regulated Operations [Abstract]
Public Utilities General Disclosures [Table]
Public Utilities General Disclosures [Table]
Public Utility [Axis]
Public Utility [Axis]
Utility Plant [Domain]
Utility Plant [Domain]
Oklaunion Power Station [Member]
Oklaunion Generating Station (Unit No. 1) [Member]
Oklaunion Generating Station (Unit No. 1) Member
Noncurrent Regulatory Assets [Axis]
Noncurrent Regulatory Assets [Axis]
Noncurrent Regulatory Assets Axis
Regulatory Assets [Domain]
Regulatory Assets [Domain]
Regulatory Assets Domain
Storm Costs Hurricane Harvey [Member]
Storm Costs Hurricane Harvey [Member]
Storm Costs Hurricane Harvey [Member]
Asset Retirement Obligation - Arkansas, Louisiana [Member]
Asset Retirement Obligation - Arkansas, Louisiana [Member]
Asset Retirement Obligation - Arkansas, Louisiana [Member]
Cook Plant Turbine [Member]
Cook Plant Turbine [Member]
Cook Plant Turbine [Member]
Cook Plant Uprate Project [Member]
Cook Plant Uprate Project [Member]
Cook Plant Uprate Project [Member]
Deferred Cook Plant Life Cycle Management Project Costs - Michigan [Member]
Michigan Deferred Cook Plant Life Cycle Management Project Costs [Member]
Michigan Deferred Cook Plant Life Cycle Management Project Costs [Member]
Other Regulatory Assets Pending Final Regulatory Approval [Member]
Other Regulatory Assets Pending Final Regulatory Approval [Member]
Other Regulatory Assets Pending Final Regulatory Approval [Member]
Plant Retirement Costs - Asset Retirement Obligation Costs [Member]
Asset Retirement Obligation Related to Retired Plants [Member]
Asset Retirement Obligation Related to Retired Plants [Member]
Plant Retirement Costs - Materials and Supplies [Member]
Materials and Supplies Related to Retired Plants [Member]
Materials and Supplies Related to Retired Plants [Member]
Plant Retirement Costs - Unrecovered Plant [Member]
Plant Retirement Costs - Unrecovered Plant [Member]
Plant Retirement Costs - Unrecovered Plant [Member]
Rate Case Expense [Member]
Rate Case Expense [Member]
Rate Case Expense.
Rate Case Expense - Texas [Member]
Rate Case Expense - Texas [Member]
Rate Case Expense - Texas [Member]
Rockport Dry Sorbent Injection System - Indiana [Member]
Rockport DSI System [Member]
Rockport DSI System [Member]
Shipe Road Transmission Project - FERC [Member]
Shipe Road Transmission Project [Member]
Shipe Road Transmission Project [Member]
Storm Related Costs [Member]
Storm Costs [Member]
Regulatory Asset Return Disclosure [Axis]
Regulatory Asset Return Disclosure [Axis]
Regulatory Asset Return Disclosure Axis
Regulatory Assets Return Disclosure [Domain]
Regulatory Assets Return Disclosure [Domain]
Regulatory Assets Return Disclosure Domain
Regulatory Assets Currently Earning Return [Member]
Regulatory Assets Currently Earning Return [Member]
Regulatory Assets Currently Earning a Return
Regulatory Assets Currently Not Earning Return [Member]
Regulatory Assets Currently Not Earning Return [Member]
Regulatory Assets Currently Not Earning a Return
Regulated Status [Axis]
Regulated Status [Axis]
Regulated Status Axis
Regulated Status [Domain]
Regulated Status [Domain]
Regulated Status Domain
Regulatory Assets Pending Final Regulatory Approval [Member]
Regulatory Assets Pending Final Regulatory Approval [Member]
Regulatory Assets Pending Final Regulatory Approval [Member]
AEP Texas Inc. [Member]
AEP Texas Inc. [Member]
AEP Texas Inc.
AEP Transmission Co [Member]
AEP Transmission Co [Member]
AEP Transmission Company, LLC.
Appalachian Power Co [Member]
Appalachian Power Co [Member]
Appalachian Power Company Member
Indiana Michigan Power Co [Member]
Indiana Michigan Power Co [Member]
Indiana Michigan Power Company Member
Ohio Power Co [Member]
Ohio Power Co [Member]
Ohio Power Company Member
Public Service Co Of Oklahoma [Member]
Public Service Co Of Oklahoma [Member]
Public Service Company Of Oklahoma Member
Southwestern Electric Power Co [Member]
Southwestern Electric Power Co [Member]
Southwestern Electric Power Company Member
Property, Plant and Equipment, Type [Axis]
Property, Plant and Equipment, Type [Axis]
Property, Plant and Equipment, Type [Domain]
Property, Plant and Equipment, Type [Domain]
Generating Units Probable of Abandonment [Member]
Remediation Property for Sale, Abandonment or Disposal [Member]
Public Utilities, General Disclosures [Line Items]
Public Utilities, General Disclosures [Line Items]
Gross Investment
Public Utilities, Property, Plant and Equipment, Generation or Processing
Accumulated Depreciation and Amortization
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment
TOTAL PROPERTY, PLANT AND EQUIPMENT - NET
Property, Plant and Equipment, Net
Materials and Supplies
Other Inventory, Supplies, Gross
Regulatory Liability, Noncurrent
Regulatory Liability, Noncurrent
Expected Retirement Date
Disposal Group, Including Discontinued Operation, Description and Timing of Disposal
Remaining Recovery Period, Plant Depreciation
Remaining Recovery Period, Plant Depreciation
The remaining amortization period for recovery of the plant depreciation.
Regulatory Assets, Noncurrent
Regulatory Assets, Noncurrent
Accounting Policies [Abstract]
Significant Accounting Matters
Significant Accounting Policies [Text Block]
Retirement Benefits [Abstract]
Retirement Plan Type [Axis]
Retirement Plan Type [Axis]
Retirement Plan Type [Domain]
Retirement Plan Type [Domain]
Pension Plans [Member]
Pension Plan [Member]
Other Postretirement Benefit Plans [Member]
Other Postretirement Benefits Plan [Member]
Components of Net Periodic Benefit Cost
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service Cost
Defined Benefit Plan, Service Cost
Interest Cost
Defined Benefit Plan, Interest Cost
Expected Return on Plan Assets
Defined Benefit Plan, Expected Return (Loss) on Plan Assets
Amortization of Prior Service Cost (Credit)
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)
Amortization of Net Actuarial Loss
Defined Benefit Plan, Amortization of Gain (Loss)
Net Periodic Benefit Cost (Credit)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)
Segments [Axis]
Segments [Axis]
Segments [Domain]
Segments [Domain]
Vertically Integrated Utilities [Member]
Vertically Integrated Utilities [Member]
Vertically Integrated Utilities [Member]
Transmission And Distribution Utilities [Member]
Transmission And Distribution Companies [Member]
Transmission And Distribution Companies [Member]
AEP Transmission Holdco [Member]
AEP Transmission Holdco [Member]
AEP Transmission Holdco.
Generation And Marketing [Member]
Generation And Marketing [Member]
Generation And Marketing [Member]
Other Segments [Member]
Other Segments [Member]
Consolidation Items [Axis]
Consolidation Items [Axis]
Consolidation Items [Domain]
Consolidation Items [Domain]
Consolidation Eliminations [Member]
Consolidation, Eliminations [Member]
Product and Service [Axis]
Product and Service [Axis]
Product and Service [Domain]
Product and Service [Domain]
Retail [Member]
Retail [Member]
Residential [Member]
Residential [Member]
Retail revenues from the residential class.
Commercial [Member]
Commercial [Member]
Retail revenues from the commercial class.
Industrial [Member]
Industrial [Member]
Retail revenues from the industrial class.
Other Retail [Member]
Other Retail [Member]
Revenues from retail classes other than residential, commercial and industrial.
Wholesale and Competitive [Member]
Wholesale and Competitive [Member]
Revenues related to wholesale and competitive sales.
Generation [Member]
Electricity, Generation [Member]
Transmission [Member]
Transmission [Member]
Transmission Member
Marketing, Competitive Retail and Renewable [Member]
Marketing, Competitive Retail and Renewable [Member]
Marketing, Competitive Retail and Renewable [Member]
Other Revenues [Member]
Other Revenues - Affiliated and Nonaffiliated [Member]
Other Revenues - Affiliated and Nonaffiliated.
Affiliated and Nonaffiliated [Member]
Affiliated and Nonaffiliated [Member]
Includes affiliated and nonaffiliated revenues.
Alternative and Other [Member]
Alternative and Other [Member]
Alternative and Other [Member]
Other Revenues [Member]
Other Revenues [Member]
Other Revenues.
Alternative [Member]
Alternative [Member]
Alternative [Member]
Recognition Period [Axis]
Recognition Period [Axis]
Recognition Period [Axis]
Recognition Period [Domain]
Recognition Period [Domain]
[Domain] for Recognition Period [Axis]
2018 [Member]
Less Than 1 Year [Member]
Time period in which fixed performance obligations will be satisfied.
2019-2020 [Member]
2-3 Years [Member]
Time period in which fixed performance obligations will be satisfied.
2021-2022 [Member]
4-5 Years [Member]
Time period in which fixed performance obligations will be satisfied.
2022 and Forward [Member]
After 5 Years [Member]
Time period in which fixed performance obligations will be satisfied.
Contract with Customer, Duration [Axis]
Contract with Customer, Duration [Axis]
Contract with Customer, Duration [Domain]
Contract with Customer, Duration [Domain]
Short-term Contract with Customer [Member]
Short-term Contract with Customer [Member]
Disaggregation of Revenue [Abstract]
Disaggregation of Revenue [Abstract]
Revenue from Contracts with Customers
Revenue from Contract with Customer, Including Assessed Tax
Total Revenues
Revenues
Revenue, Performance Obligation [Abstract]
Revenue, Performance Obligation [Abstract]
Fixed Performance Obligations
Revenue, Remaining Performance Obligation, Amount
Assets, Current [Abstract]
Assets, Current [Abstract]
Affiliated Companies - Contracts with Customers
Accounts Receivable, Related Parties, Current
Revenue Textuals [Abstract]
Revenue Textuals [Abstract]
Revenue Textuals Abstract.
Revenue from Related Parties
Revenue from Related Parties
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Concentration Risk Benchmark [Axis]
Concentration Risk Benchmark [Axis]
Concentration Risk Benchmark [Domain]
Concentration Risk Benchmark [Domain]
Vertically Integrated Utilities Revenues [Member]
Vertically Integrated Utilities Revenues [Member]
Vertically Integrated Utilities Revenues.
Generation and Marketing Revenues [Member]
Generation and Marketing Revenues [Member]
Generation and Marketing Revenues.
Electric Generation, Transmission and Distribution Revenues [Member]
Electric Generation Transmission Distribution Revenues [Member]
Electric Generation, Transmission and Distribution Revenues.
Purchased Electricity for Resale [Member]
Purchased Electricity for Resale [Member]
Purchased Electricity for Resale.
Other Operation Expense [Member]
Other Operation Expense [Member]
Other operation expense.
Maintenance Expense [Member]
Maintenance Expense [Member]
Maintenance expense.
Regulatory Assets [Member]
Regulatory Assets [Member]
Regulatory Assets.
Regulatory Liabilities [Member]
Regulatory Liabilities [Member]
Regulatory Liabilities.
Derivative Instrument [Axis]
Derivative Instrument [Axis]
Derivative Contract [Domain]
Derivative Contract [Domain]
Commodity [Member]
Commodity Contract [Member]
Interest Rate [Member]
Interest Rate [Member]
Interest Rate Member.
Gross Amounts of Risk Management Assets/Liabilities Recognized [Member]
Gross Amounts of Risk Management Assets Liabilities Recognized [Member]
Gross Amounts of Risk Management Assets/Liabilities Recognized.
Gross Amounts Offset in the Statement of Financial Position [Member]
Gross Amounts Offset in Statement of Financial Position [Member]
Gross Amounts Offset in the Statement of Financial Position.
Net Amounts of Assets/Liabilities Presented in the Statement of Financial Position [Member]
Net Amounts of Assets Liabilities Presented in Statement of Financial Position [Member]
Net Amounts of Assets/Liabilities Presented in the Statement of Financial Position.
Power [Member]
Power Contract Member [Member]
Nominal energy measure used to calculate payments on a derivative instrument.
Coal [Member]
Coal Contract [Member]
Natural Gas [Member]
Natural Gas Contract [Member]
Nominal energy measure used to calculate payments on a derivative instrument.
Heating Oil and Gasoline [Member]
Heating Oil And Gasoline Contract Member [Member]
Nominal volume used to calculate payments on a derivative instrument.
Interest Rate Contract [Member]
Interest Rate Contract [Member]
Hedging Relationship [Axis]
Hedging Relationship [Axis]
Hedging Relationship [Domain]
Hedging Relationship [Domain]
Risk Management Contracts [Member]
Risk Management Commodity Contracts [Member]
Risk Management Contracts Member.
Hedging Contracts [Member]
Hedging Contracts [Member]
Notional Volume Of Derivative Instruments
Notional Volume Of Derivative Instruments [Abstract]
Notional Volume Of Derivative Instruments Abstract.
Commodity:
Commodity [Abstract]
Commodity.
Derivative, Energy Notional Amount
Derivative Nonmonetary Energy Notional Amount
Volume of energy derivative contracts.
Derivative, Mass Notional Amount
Derivative Nonmonetary Mass Notional Amount
Volume of coal derivative contracts.
Derivative, Volume Notional Amount
Derivative Nonmonetary Volume Notional Amount
Volume of heating oil and gasoline derivative contracts.
Derivative, Notional Amount
Derivative, Notional Amount
Cash Collateral Netting
Cash Collateral Netting [Abstract]
Cash collateral netting detail.
Cash Collateral Received Netted Against Risk Management Assets
Securities Received as Collateral
Cash Collateral Paid Netted Against Risk Management Liabilities
Obligation to Return Securities Received as Collateral
Fair Value of Derivative Instruments
Derivative Instrument Detail [Abstract]
Current Risk Management Assets
Derivative Asset, Current
Long-term Risk Management Assets
Derivative Asset, Noncurrent
Total Assets
Derivative Asset
Current Risk Management Liabilities
Derivative Liability, Current
Long-term Risk Management Liabilities
Derivative Liability, Noncurrent
Total Liabilities
Derivative Liability
Total MTM Derivative Contract Net Assets (Liabilities)
Derivative Assets (Liabilities), at Fair Value, Net
Amount of Gain (Loss) Recognized on Risk Management Contracts
Gain (Loss) on Derivative Instruments, Net, Pretax [Abstract]
Amount of Gain (Loss) Recognized on Risk Management Contracts
Gain (Loss) on Derivative Instruments, Net, Pretax
Amount of Gain (Loss) Recognized on Risk Management Contracts
Derivative Risk Management Contracts Gain Loss Recognized As Regulatory Asset Liability
Realized and unrealized gains and losses subject to regulatory accounting treatment recorded as either current or noncurrent on the balance sheets.
Carrying Amount of Hedged Asset (Liability)
Carrying Amount of Hedged Asset (Liability)
Carrying Amount of Hedged Asset (Liability)
Cumulative Fair Value Hedging Adjustment in the Carrying Amount of the Hedged Asset (Liability)
Cumulative Fair Value Hedging Adjustment in the Carrying Amount of the Hedged Asset (Liability)
Cumulative Fair Value Hedging Adjustment in the Carrying Amount of the Hedged Asset (Liability)
Gain (Loss) on Hedging Instruments
Derivative, Gain (Loss) on Derivative, Net [Abstract]
Gain (Loss) on Fair Value Hedging Instruments
Derivative, Gain (Loss) on Derivative, Net
Gain (Loss) on Fair Value Portion of Long Term Debt
Gain (Loss) on Fair Value Portion of Long Term Debt
Gain (Loss) on fair value portion of long-term debt.
Impact of Cash Flow Hedges on the Condensed Balance Sheet
Impact of Cash Flow Hedges on Balance Sheet [Abstract]
Impact of Cash Flow Hedges on Balance Sheet.
AOCI Gain (Loss) Net of Tax
Accumulated Other Comprehensive Income (Loss), Cumulative Changes in Net Gain (Loss) from Cash Flow Hedges, Effect Net of Tax
Portion Expected to be Reclassified to Net Income During the Next Twelve Months
Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months
Collateral Triggering Events [Abstract]
Collateral Triggering Events [Abstract]
Collateral Triggering Events Abstract.
Liabilities for Contracts with Cross Default Provisions Prior to Contractual Netting Arrangements
Fair Value Of Derivative Liabilities Subject To Cross Default Provisions
Fair value of derivative liabilities subject to cross-default provisions.
Amount of Cash Collateral Posted
Collateral Already Posted, Aggregate Fair Value
Additional Settlement Liability if Cross Default Provision is Triggered
Assets Needed for Immediate Settlement, Aggregate Fair Value
Derivatives and Hedging (Textuals) [Abstract]
Derivatives and Hedging Textuals [Abstract]
Derivatives and Hedging Textuals
Maximum Term for Exposure to Variability of Future Cash Flows
Maximum Length of Time Hedged in Price Risk Cash Flow Hedge
Cross Default Provisions Maximum Third Party Obligation Amount
Cross Default Provisions Maximum Third Party Obligation Amount
Non-exchange traded commodity contracts containing cross-default provisions
Derivatives and Hedging
Derivative Instruments and Hedging Activities Disclosure [Text Block]
Commitments Guarantees and Contingencies [Abstract]
Maximum Future Payments for Letters of Credit Uncommitted Facilities
Maximum Future Payments for Letters of Credit Uncommitted Facilities [Table Text Block]
[Table Text Block] for aep_MaximumFuturePaymentsForLettersOfCreditUncommittedFacilitiesTextBlock [Table]
Maximum Potential Loss on Master Lease Agreements
Maximum Potential Loss on Master Lease Agreements [Text Block]
Maximum potential loss on master lease agreements.
Income Tax Disclosure [Abstract]
Base Rate [Axis]
Base Rate [Axis]
Base Rate Axis.
Base Rate [Domain]
Base Rate [Domain]
Base Rate Domain.
West Virginia Tax Reform [Member]
West Virginia Tax Reform [Member]
West Virginia Tax Reform [Member]
Ohio Tax Reform [Member]
Ohio Tax Reform [Member]
Ohio Tax Reform [Member]
Tax Issue [Axis]
Tax Issue [Axis]
Tax Issue [Axis]
Tax Issue [Domain]
Tax Issue [Domain]
[Domain] for Tax Issue [Axis]
Amortization of Excess ADIT [Member]
Amortization of Excess ADIT [Member]
Amortization of Excess ADIT [Member]
Kentucky Legislation - House Bill 487 [Member]
Kentucky Legislation - House Bill 487 [Member]
Kentucky Legislation - House Bill 487 [Member]
IRS Audit Settlement [Member]
IRS Audit Settlement [Member]
Amount of unrecognized tax expense (benefit) reversed as a result of a settlement with the IRS from examinations of prior year tax returns.
Remeasurement of Kentucky Deferred Taxes [Member]
Remeasurement of Kentucky Deferred Taxes [Member]
Income Tax Expense (Benefit) due to remeasurement of Kentucky deferred taxes under a unitary filing group.
Tax Reform Total Revenue [Axis]
Tax Reform Total Revenue [Axis]
Tax Reform Total Revenue [Axis]
Tax Reform Total Revenue [Domain]
Tax Reform Total Revenue [Domain]
[Domain] for Tax Reform Total Revenue [Axis]
Reduction in Corporate Federal Income Tax Rate [Member]
Reduction in Corporate Federal Income Tax Rate [Member]
Reduction in Corporate Federal Income Tax Rate [Member]
Excess ADIT [Member]
Excess ADIT [Member]
Excess ADIT [Member]
Income Tax Authority [Axis]
Income Tax Authority [Axis]
Income Tax Authority [Domain]
Income Tax Authority [Domain]
Net Regulatory Liability for Tax Reform [Member]
Net Regulatory Liability for Tax Reform [Member]
Net Regulatory Liability for Tax Reform [Member]
Incremental Liability for Tax Reform [Member]
Incremental Liability for Tax Reform [Member]
Incremental Liability for Tax Reform [Member]
Pretax Excess ADIT [Member]
Pretax Excess ADIT [Member]
Pretax Excess ADIT [Member]
Temporary Differences Associated with Depreciable Property [Member]
Temporary Differences Associated with Depreciable Property [Member]
Temporary Differences Associated with Depreciable Property [Member]
Remaining Excess ADIT [Member]
Remaining Excess ADIT [Member]
Remaining Excess ADIT [Member]
Reversed Unrecognized Tax Benefit
Deferred Federal Income Tax Expense (Benefit)
Income Tax Expense (Benefit)
Income Tax Expense (Benefit)
Increase in Current Liabilities
Increase (Decrease) in Other Current Liabilities
Increase in Deferred Credits and Other Noncurrent Liabilities
Increase (Decrease) in Other Noncurrent Liabilities
Effective Income Tax Rate
Effective Income Tax Rate Reconciliation, Percent
Income Taxes (Textuals)
Income Taxes (Textuals) [Abstract]
Income Taxes.
Excess Accumulated Deferred Income Taxes
Excess Accumulated Deferred Income Taxes
Excess Accumulated Deferred Income Taxes
Effective Income Tax Rate Reconciliation, Variance Explanation, Percent
Effective Income Tax Rate Reconciliation,Other Reconciling Items, Percent
Federal Statutory Income Tax Rate
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent
Kentucky Net Operating Loss Limitation Percent
Kentucky Net Operating Loss Limitation Percent
Kentucky Net Operating Loss Limitation Percent
Kentucky Single Corporate Tax Rate
Kentucky Single Corporate Tax Rate
Kentucky Single Corporate Tax Rate
Components of Net Periodic Benefit Cost
Schedule of Net Benefit Costs [Table Text Block]
Project [Axis]
Project [Axis]
Project [Domain]
Project [Domain]
Subsequent Event Type [Axis]
Subsequent Event Type [Axis]
Subsequent Event Type [Domain]
Subsequent Event Type [Domain]
Subsequent Event [Member]
Subsequent Event [Member]
Range [Axis]
Range [Axis]
Range [Domain]
Range [Domain]
Minimum [Member]
Minimum [Member]
Maximum [Member]
Maximum [Member]
AEP Texas Interim Transmission and Distribution Rates [Member]
AEP Texas Interim Transmission and Distribution Rates [Member]
AEP Texas Interim Transmission and Distribution Rates [Member]
Hurricane Harvey Storm [Member]
Hurricane Harvey Storm [Member]
Hurricane Harvey Storm [Member]
ETT Interim Transmission Rates [Member]
ETT Interim Transmission Rates [Member]
ETT Interim Transmission Rates [Member]
2018 Oklahoma Base Rate Case [Member]
2018 Oklahoma Base Rate Case [Member]
2018 Oklahoma Base Rate Case [Member]
Oklahoma Tax Reform [Member]
Oklahoma Tax Reform [Member]
Oklahoma Tax Reform [Member]
FERC Transmission Complaint - AEP SPP Participants [Member]
FERC Transmission Complaint - AEP SPP Participants [Member]
FERC Transmission Complaint - AEP SPP Participants
2012 Texas Base Rate Case [Member]
2012 Texas Base Rate Case [Member]
2012 Texas Base Rate Case [Member]
2016 Texas Base Rate Case [Member]
2016 Texas Base Rate Case [Member]
2016 Texas Base Rate Case [Member]
Texas Tax Reform [Member]
Texas Tax Reform [Member]
Texas Tax Reform [Member]
Louisiana 2015 Formula Rate Filing [Member]
Louisiana 2015 Formula Rate Filing [Member]
Louisiana 2015 Formula Rate Filing [Member]
Louisiana 2017 Formula Rate Filing [Member]
Louisiana 2017 Formula Rate Filing [Member]
Louisiana 2017 Formula Rate Filing [Member]
Louisiana 2018 Formula Rate Filing [Member]
Louisiana 2018 Formula Rate Filing [Member]
Louisiana 2018 Formula Rate Filing [Member]
Welsh Plant, Units 1 and 3 - Environmental Projects [Member]
Welsh Plant Units 1 And 3 Environmental Projects [Member]
Welsh Plant Units 1 And 3 Environmental Projects [Member]
Arkansas Tax Reform [Member]
Arkansas Tax Reform [Member]
Arkansas Tax Reform [Member]
FERC SWEPCo Power Supply Agreements Complaint [Member]
FERC SWEPCo Power Supply Agreements Complaint [Member]
FERC SWEPCo power supply agreements complaint.
Welsh Plant, Units 1 and 3 [Member]
Welsh Plant Unit 1 and 3 [Member]
Welsh Plant Unit 1 and 3 [Member]
AEP Texas Cumulative Revenues Subject to Review
AEP Texas Cumulative Revenues Subject to Review
AEP Texas cumulative revenues, subject to review, based upon interim rate increases received from 2009 through 2016.
Net Increase in Transmission Rates
Net Increase in Transmission Rates
Net Increase in Transmission Rates as a result of increased capital additions partially offset by decreases due to Tax Reform.
Increase in Transmission Rates Due to Capital Investments
Increase in Transmission Rates Due to Capital Investments
The amount of increase in AEP Texas' transmission rates due to capital investments.
Reduction in Transmission Rates Due to Tax Reform
Reduction In Transmission Rates Due To Tax Reform
Amount of reduction in transmission rates proposed due to Tax Reform.
Net Decrease In DCRF
Net Decrease In DCRF
Amount of net decrease in its DCRF proposed by AEP Texas.
Increase in Distribution Rates Due to Capital Investments
Increase in Distribution Rates Due to Capital Investments
The amount of increase in AEP Texas' distribution rates due to capital investments.
Refund Due to Tax Reform
Refund Due to Tax Reform
Additional ongoing refund due to Tax Reform
Refund for Current Year Tax Reform Rate Change
Refund for Current Year Tax Reform Rate Change
Amount of refund to be given through rate reductions, riders, etc related to over-collection of current year taxes as a result of Tax Reform.
Refund for Excess ADIT Associated with Certain Depreciable Property
Refund for Excess ADIT Associated with Certain Depreciable Property
Amount of refund to be given through rate reductions, riders, etc related to Excess ADIT Associated with Certain Depreciable Property.
Refund for Excess ADIT Not Subject to Rate Normalization Requirements
Refund for Excess ADIT Not Subject to Rate Normalization Requirements
Amount of refund to be given through rate reductions, riders, etc related to Excess ADIT Not Subject to Rate Normalization Requirements.
Annual Recovery of Storm Costs through Base Rates
Annual Recovery of Storm Costs through Base Rates
AEP Texas' current recovery of annual storm costs through base rates.
AEP Texas Total Storm-Related Costs
AEP Texas Total Storm-Related Costs
AEP Texas' total deferred storm-related costs
AEP Texas Hurricane Harvey Storm-Related Costs
AEP Texas Hurricane Harvey Storm-Related Costs
AEP Texas' deferred storm costs as a regulatory asset related to Hurricane Harvey.
AEP Texas Hurricane Harvey Storm-Capital Expenditures
AEP Texas Hurricane Harvey Storm-Capital Expenditures
AEP Texas' storm costs capitalized assets related to Hurricane Harvey.
Hurricane Harvey Storm Insurance Proceeds Received
Hurricane Harvey Storm Insurance Proceeds Received
AEP Texas' insurance proceeds received related to Hurricane Harvey.
AEP Texas Hurricane Harvey Storm-Insurance Proceeds to be Received
AEP Texas Hurricane Harvey Storm-Insurance Proceeds to be Received
AEP Texas' insurance proceeds expected but not yet received related to Hurricane Harvey.
Determination of System Restoration Costs for Total Estimated Storm Costs
Determination of System Restoration Costs for Total Estimated Storm Costs
Amount of total Estimated Storm Costs related to Hurricane Harvey included in the Determination of System Restoration Costs filed by AEP Texas.
Determination of System Restoration Costs for Total Estimated Storm Costs Net of Offsets
Determination of System Restoration Costs for Total Estimated Storm Costs Net of Offsets
Amount of Estimated Storm Costs related to Hurricane Harvey included in the Determination of System Restoration Costs filed by AEP Texas net of offsets for insurance proceeds, tax credits and Excess ADIT.
Amount of Securitization Request for Distribution Related Assets
Amount of Securitization Request for Distribution Related Assets
The amount amount of securitization requested by AEP Texas for distribution related assets related to Hurricane Harvey.
Amount of Transmission Related Assets to be Recovered at a Later Time
Amount of Transmission Related Assets to be Recovered at a Later Time
Amount of transmission related assets related to Hurricane Harvey that will be recovered at a later time through transmission filings or upcoming base rate cases.
Intervenor Requested Reduction in Amount of Securitization for Distribution Related Assets
Intervenor Requested Reduction in Amount of Securitization for Distribution Related Assets
Amount of intervenor requested reductions in the amount of securitization requested by AEP Texas for Hurricane Harvey.
PUCT Staff Requested Reduction in Amount of Securitization for Distribution Related Assets
PUCT Staff Requested Reduction in Amount of Securitization for Distribution Related Assets
Amount of PUCT Staff requested reductions in the amount of securitization requested by AEP Texas for Hurricane Harvey.
Parent Ownership Interest In ETT
Parent Ownership Interest In ETT
Parents equity ownership interest in ETT.
AEP Share Of ETT Cumulative Revenues Subject To Review
AEP Share Of ETT Cumulative Revenues Subject To Review
AEP's share of ETT's cumulative revenues, subject to review, based upon interim rate increases received from 2009 through 2015.
Requested Annual Net Increase
Requested Annual Net Increase
Requested annual net increase in rates
Amount of Increase Related to Increased Storm Expense Amortization
Amount of Increase Related to Increased Storm Expense Amortization
Amount of requested increase related to the increase in storm expense amortization.
2013 Reversal of Previously Recorded Regulatory Disallowances
2013ReversalOfPreviouslyRecordedRegulatoryDisallowances
The 2013 reversal of previously recorded regulatory disallowances.
Resulting Approved Base Rate Increase
Resulting Approved Base Rate Increase
The resulting annual base rate increase subsequent to recent rulings.
Requested Net Increase in Texas Annual Revenues
Requested Net Increase in Texas Annual Revenues
Requested net increase in Texas annual revenues.
Approved Return on Common Equity
Public Utilities, Approved Return on Equity, Percentage
Requested Return on Common Equity
Requested Return on Equity
Requested return on equity.
Approved Net Increase in Texas Annual Revenues
Approved Net Increase in Texas Annual Revenues
Net Increase in approved Texas Annual Revenues
Approved Return on Common Equity
Approved Return on Common Equity
Percentage of public utility's requested return on equity.
Approved Additional Vegetation Management Expenses
Approved Additional Vegetation Management Expenses
Increase in approved additional vegetation management expenses
Impairment Charge Total
Impairment Charge Total
Total impairment charge recorded as part of agreement.
Impairment Charge Welsh Plant, Unit 2
Impairment Charge Welsh Plant, Unit 2
Impairment recorded due to lack of return on Welsh Plant Unit 2.
Impairment Charge Disallowed Plant Investments
Impairment Charge Disallowed Plant Investments
Impairment Charge recorded to recognize disallowed plant investments.
Additional Revenues Recognized to be Surcharged to Customers
Additional Revenues Recognized to be Surcharged to Customers
Increase in revenues recognized to be surcharged to customers
Additional Recognized Expenses Consisting Primarily of Depreciation and Vegetation Management
Additional Recognized Expenses Consisting Primarily of Depreciation and Vegetation Management
Increase in recognized expenses consisting primarily of depreciation and vegetation management
Proposed Revenue Reduction Due to Tax Reform
Proposed Revenue Reduction Due to Tax Reform
Proposed reduction in revenues as a result of Tax Reform.
Approved Reduction in Residential Rates Due to Tax Reform
Approved Reduction in Residential Rates Due to Tax Reform
Approved reduction in residential rates as a result of Tax Reform.
Requested Annual Increase
Requested Annual Increase
Requested annual increase.
Adjusted Requested Annual Increase
Adjusted Requested Annual Increase
Adjusted annual increase request due to Excess ADIT to be returned to customers.
Projected Capital Costs
Projected Capital Costs
Projected capital costs of property, plant and equipment.
Construction Work in Progress
Construction in Progress, Gross
Property, Plant and Equipment, Net
Public Utilities, Property, Plant and Equipment, Net
Total Amount of Recovery Requested Related to Arkansas Retail Jurisdictional Share of Environmental Costs
Total Amount of Recovery Requested Related to Arkansas Retail Jurisdictional Share of Environmental Costs
Total amount of recovery requested related to Arkansas retail jurisdiction share of environmental costs incurred.
Amount Of Recovery Requested Related To Louisiana Retail Jurisdictional Share Of Environmental Costs
Total Amount Of Recovery Requested Related To Louisiana Retail Jurisdictional Share Of Environmental Costs
Total amount of recovery requested related to the Louisiana jurisdictional share of environmental costs.
Amount of LPSC Approved Eligible Welsh Plant Environmental Control Deferrals
Amount of LPSC Approved Eligible Welsh Plant Environmental Control Deferrals
Amount of LPSC approved eligible Welsh Plant environmental control deferrals.
Amount of LPSC Approved Eligible Welsh Plant Environmental Control Deferred Unrecognized Equity
Amount of LPSC Approved Eligible Welsh Plant Environmental Control Deferred Unrecognized Equity
Amount of LPSC approved eligible Welsh Plant environmental control deferred unrecognized equity.
Amount of Increase Related to Annual Depreciation Rates
Amount Of Increased Depreciation Expense Requested
Amount of increased depreciation expense requested.
Second Intervenor Recommended Return on Common Equity
Second Intervenor Recommended Return on Common Equity
Recommended return on common equity filed by second set of intervenors
Intervenor Recommended Return on Common Equity
Intervenor Recommended Return On Common Equity Range
Intervenor recommended return on common equity.
Agreed Upon Return on Common Equity
Agreed Upon Return on Common Equity
Percentage of public utility's agreed upon return on equity.
Agreed Upon One-Time Billing Credit
Agreed Upon One-Time Billing Credit
Amount of one-time billing credit to reflect lower return on common equity between September 1, 2017 and December 31, 2017.
Variable Interest Entities [Abstract]
Balance Sheet Location [Axis]
Balance Sheet Location [Axis]
Balance Sheet Location [Domain]
Balance Sheet Location [Domain]
Current Assets [Member]
Current Assets [Member]
Current Assets
Net Property Plant And Equipment [Member]
Net Property Plant And Equipment [Member]
Net Property Plant And Equipment
Other Noncurrent Assets [Member]
Other Noncurrent Assets [Member]
Total Assets [Member]
Total Assets [Member]
Total Assets
Current Liabilities [Member]
Current Liabilities [Member]
Current Liabilities
Noncurrent Liabilities [Member]
Noncurrent Liabilities [Member]
Noncurrent Liabilities
Equity [Member]
Equity [Member]
Total Liabilities And Equity [Member]
Total Liabilities And Equity [Member]
Total Liabilities And Equity
Variable Interest Entities [Axis]
Variable Interest Entities [Axis]
Variable Interest Entities [Domain]
Variable Interest Entity, Classification [Domain]
Trent and Desert Sky Wind Farms [Member]
Trent and Desert Sky Wind Farms [Member]
Trent and Desert Sky Wind Farms [Member]
Non-Affiliate Contribution [Member]
Non-Affiliate Contribution [Member]
Non-affiliate contribution.
Consolidated Assets and Liabilities of Variable Interest Entities
Variable Interest Entity, Consolidated, Carrying Amount, Assets and Liabilities, Net [Abstract]
Assets [Abstract]
Assets [Abstract]
Assets
Variable Interest Entity, Consolidated, Carrying Amount, Assets
Liabilities and Equity [Abstract]
Liabilities and Equity [Abstract]
Variable Interest Carrying Amount Liabilities and Equity
Variable Interest Carrying Amount Liabilities and Equity
Variable Interest carrying amount liabilities and equity.
Variable Interest Entities (Textuals) [Abstract]
Variable Interest Entities (Textuals) [Abstract]
Non-Affiliate Interest
Non-Affiliate Interest
Non-affiliate member's interest in Desert Sky Wind Farm LLC and Trent Wind Farm LLC for repowering.
AEP Ownership in LLCs
AEP Ownership in LLCs
AEP's ownership in Desert Sky Wind Farm LLC and Trent Wind Farm LLC.
Desert Sky and Trent PPA Period
Desert Sky and Trent PPA Period
Desert Sky and Trent PPA for the sale of power to AEPEP related to deliveries of electricity beginning January 1, 2021 for a 12 year period.
Redeemable Noncontrolling Interest
Redeemable Noncontrolling Interest, Equity, Carrying Amount
Fair Value Disclosures [Abstract]
Fair Value Measurements
Fair Value Disclosures [Text Block]
Statement of Financial Position [Abstract]
Current Assets
Cash and Cash Equivalents
Cash and Cash Equivalents, at Carrying Value
Restricted Cash
Restricted Cash and Cash Equivalents, Current
Other Temporary Investments
Short-term Investments
Advances to Affiliates
Due from Related Parties, Current
Accounts Receivable:
Accounts Receivable, Net, Current [Abstract]
Customers
Accounts Receivable, Gross, Current
Affiliated Companies
Accrued Unbilled Revenues
Unbilled Receivables, Current
Pledged Accounts Receivable - AEP Credit
Transfers Accounted for as Secured Borrowings, Assets, Carrying Amount
Miscellaneous
Other Receivables
Allowance for Uncollectible Accounts
Allowance for Doubtful Accounts Receivable, Current
Total Accounts Receivable
Accounts Receivable, Net, Current
Fuel
Inventory, Raw Materials, Gross
Materials and Supplies
Renewable Energy Credits
Renewable Energy Credits
Amount of renewable energy credits removed from the materials and supplies line item and split out separately on the face of the balance sheet due to materiality.
Risk Management Assets
Accrued Tax Benefits
Income Taxes Receivable, Current
Regulatory Asset for Under-Recovered Fuel Costs
Regulatory Assets, Current
Accrued Reimbursement of Spent Nuclear Fuel Costs
Accrued Reimbursement of Spent Nuclear Fuel Costs
Accrued reimbursement of spent nuclear fuel costs at Cook nuclear plant. The Department of Energy has an obligation to I&M over the storage of spent nuclear waste.
Margin Deposits
Margin Deposit Assets
Prepayments and Other Current Assets
Prepaid Expense and Other Assets, Current
TOTAL CURRENT ASSETS
Assets, Current
Property, Plant and Equipment
Property, Plant and Equipment, Gross [Abstract]
Generation
Transmission
Public Utilities, Property, Plant and Equipment, Transmission
Distribution
Public Utilities, Property, Plant and Equipment, Distribution
Other Property, Plant and Equipment
Public Utilities, Property, Plant and Equipment, Other Property, Plant and Equipment
Total Property, Plant and Equipment
Property, Plant and Equipment, Gross
TOTAL PROPERTY, PLANT AND EQUIPMENT - NET
Other Noncurrent Assets
Assets, Noncurrent [Abstract]
Regulatory Assets
Securitized Assets
Securitized Regulatory Transition Assets, Noncurrent
Spent Nuclear Fuel and Decommissioning Trusts
Spent Nuclear Fuel And Decommissioning Trusts
Funds to pay for the disposal of spent nuclear fuel and the decontaminating and decommissioning of nuclear facilities through the collection of revenues from rate payers.
Goodwill
Goodwill
Employee Benefits and Pension Assets
Employee Benefits and Pension Assets
Element represents the noncurrent asset recognized on the balance sheet that is associated with employee benefit and pension assets including, but not limited to, defined benefit pension plans, other postretirement defined benefit plans, deferred incentive compensation and other postemployment benefits.
Deferred Property Taxes
Deferred Tax Assets, Property, Plant and Equipment
Deferred Charges and Other Noncurrent Assets
Other Assets, Noncurrent
TOTAL OTHER NONCURRENT ASSETS
Assets, Noncurrent
TOTAL ASSETS
Assets
Current Liabilities
Liabilities, Current [Abstract]
Advances from Affiliates
Due to Related Parties, Current
Accounts Payable
Accounts Payable, Current
Affiliated Companies
Accounts Payable, Related Parties, Current
Short-term Debt:
Short-term Debt [Abstract]
Securitized Debt for Receivables - AEP Credit
Transfers Accounted for as Secured Borrowings, Associated Liabilities, Carrying Amount
Other Short-term Debt
Short-term Bank Loans and Notes Payable
Total Short-term Debt
Short-term Debt
Long-term Debt Due Within One Year
Long-term Debt, Current Maturities
Risk Management Liabilities
Customer Deposits
Customer Deposits, Current
Accrued Taxes
Taxes Payable, Current
Accrued Interest
Interest Payable, Current
Oklaunion Purchase Power Agreement
Oklaunion Purchase Power Agreement - Current
AEP Texas has partial ownership in the Oklaunion Plant which is operated by PSO but has leased its entire portion of the output of the plant to a non-utility affiliate. This is the current liability portion of the lease.
Obligations Under Capital Leases
Capital Lease Obligations, Current
Regulatory Liability for Over-Recovered Fuel Costs
Regulatory Liability, Current
Other Current Liabilities
Other Liabilities, Current
TOTAL CURRENT LIABILITIES
Liabilities, Current
Noncurrent Liabilities
Liabilities, Noncurrent [Abstract]
Long-term Debt
Long-term Debt, Excluding Current Maturities
Long-term Risk Management Liabilities
Deferred Income Taxes
Deferred Tax Liabilities, Net, Noncurrent
Regulatory Liabilities and Deferred Investment Tax Credits
Oklaunion Purchase Power Agreement
Oklaunion Purchase Power Agreement
AEP Texas has partial ownership in the Oklaunion Plant which is operated by PSO but has leased its entire portion of the output of the plant to a non-utility affiliate. This is the noncurrent liability portion of the lease.
Asset Retirement Obligations
Asset Retirement Obligations, Noncurrent
Employee Benefits and Pension Obligations
Employee Benefits and Pension Obligations
Element represents the noncurrent liability recognized on the balance sheet that is associated with employee benefit and pension obligations including, but not limited to, defined benefit pension plans, other postretirement defined benefit plans, deferred incentive compensation and other postemployment benefits.
Obligations Under Capital Leases
Capital Lease Obligations, Noncurrent
Deferred Credits and Other Noncurrent Liabilities
Other Liabilities, Noncurrent
TOTAL NONCURRENT LIABILITIES
Liabilities, Noncurrent
TOTAL LIABILITIES
Liabilities
Rate Matters
Rate Matters
Describes all of the specific events that have or may impact rates and amortization of regulatory assets and liabilities (for example, pending or recently concluded regulatory proceedings, environmental requirements). Specifics may include quantifications related to rates, costs and earnings. Events may relate to rate moratoriums or price caps.
Commitments and Contingencies
Commitments and Contingencies
Contingently Reedemable Performance Share Awards
Mezzanine Equity
The fair value as of the balance sheet date of contingently redeemable performance share awards.
Total Mezzanine Equity
Total Mezzanine Equity
Total mezzanine equity balance.
Equity
Stockholders' Equity Attributable to Parent [Abstract]
Common Stock
Common Stock, Value, Issued
Paid-in Captial
Members' Capital
Paid-in Capital
Additional Paid in Capital
Retained Earnings
Retained Earnings (Accumulated Deficit)
Accumulated Other Comprehensive Income (Loss)
Accumulated Other Comprehensive Income (Loss), Net of Tax
TOTAL COMMON SHAREHOLDER'S EQUITY
Stockholders' Equity Attributable to Parent
Noncontrolling Interests
Stockholders' Equity Attributable to Noncontrolling Interest
TOTAL MEMBER'S EQUITY
Members' Equity
TOTAL EQUITY
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest
TOTAL LIABILITIES AND EQUITY
Liabilities and Equity
Comprehensive Income [Abstract]
Comprehensive Income
Comprehensive Income (Loss) Note [Text Block]
Income Taxes
Income Tax Disclosure [Text Block]
Segment Reporting [Abstract]
AEP Transmission Holdco [Member]
Transmission Operations [Member]
Transmission Operations Member.
All Other [Member]
State Transcos [Member]
State Transcos [Member]
State Transcos [Member]
AEPTCo Parent [Member]
AEPTCo Parent [Member]
AEPTCo Parent [Member]
Reconciling Adjustments [Member]
Vertically Integrated Utilities [Member]
Electricity [Member]
Transmission and Distribution Utilities Revenues [Member]
Transmission and Distribution Utilities Revenues [Member]
Transmission and Distribution Revenues.
Transmission [Member]
Electric Transmission [Member]
Reportable Segment Information
Segment Reporting Information, Profit (Loss) [Abstract]
Sales to AEP Affiliates
Interest Income
Investment Income, Interest and Dividend
Interest Expense
Interest Expense
Income Tax Expense
Net Income (Loss)
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest
Balance Sheet Information
Segment Reporting Information, Additional Information [Abstract]
Total Property, Plant and Equipment
Notes Receivable, Related Parties
Total Assets
Long-term Debt - Affiliated
Affiliated Long Term Debt Noncurrent
Sum of the affiliated carrying values as of the balance sheet date of all long-term debt, which is debt initially having maturities due after one year from the balance sheet date or beyond the operating cycle, if longer, but excluding the portions thereof scheduled to be repaid within one year (current maturities) or the normal operating cycle, if longer, and after deducting unamortized discount or premiums, if any.
Total Long-term Debt Outstanding
Long-term Debt
Maturity of Credit Facility [Axis]
Maturity of Credit Facility [Axis]
Maturity of Credit Facility
maturityofcreditfacility [Domain]
maturityofcreditfacility [Domain]
[Domain] for maturityofcreditfacility [Axis]
July 2020 [Member]
July 2020 [Member]
July 2020
July 2021 [Member]
July 2021 [Member]
July 2021
AEP Energy [Member]
AEP Energy [Member]
AEP Energy
Transource Energy [Member]
Transource Energy [Member]
Transource Energy [Member]
Wheeling Power Co [Member]
Wheeling Power Co [Member] [Domain]
Wheeling Power Co [Member] [Domain]
Short-term Debt, Type [Axis]
Short-term Debt, Type [Axis]
Short-term Debt, Type [Domain]
Short-term Debt, Type [Domain]
Commercial Paper [Member]
Commercial Paper [Member]
Loans Payable [Member]
Loans Payable [Member]
Long-term Debt, Type [Axis]
Long-term Debt, Type [Axis]
Long-term Debt, Type [Domain]
Long-term Debt, Type [Domain]
Notes Payable, Other Payables [Member]
Notes Payable, Other Payables [Member]
Notes Payable, Other Payable Two [Member]
Notes Payable, Other Payable Two [Member]
A written promise to pay a note to a third party.
Notes Payable, Other Payable Three [Member]
Notes Payable, Other Payable Three [Member]
A written promise to pay a note to a third party.
Notes Payable, Other Payable Four [Member]
Notes Payable, Other Payable Four [Member]
A written promise to pay a note to a third party.
Notes Payable, Other Payable Five [Member]
Notes Payable, Other Payable Five [Member]
A written promise to pay a note to a third party.
Notes Payable, Other Payables Six [Member]
Notes Payable, Other Payables Six [Member]
A written promise to pay a note to a third party.
Notes Payable, Other Payable Seven [Member]
Notes Payable, Other Payable Seven [Member]
A written promise to pay a note to a third party.
Notes Payable, Other Payable Eight [Member]
Notes Payable, Other Payable Eight [Member]
A written promise to pay a note to a third party.
Other Long Term Debt [Member]
Other Long Term Debt [Member]
Other long term debt member
Other Long Term Debt Two [Member]
OtherLongTermDebtTwo [Member]
Other Long Term Debt Two [Member]
Other Long Term Debt Three [Member]
Other Long Term Debt Three [Member]
Other Long Term Debt Three [Member]
Pollution Control Bonds [Member]
Pollution Control Bonds [Member]
Pollution Control Bonds Member.
Pollution Control Bonds Two [Member]
Pollution Control Bonds Two [Member]
Pollution Control Bonds Member.
Securitization Bonds [Member]
Securitization Bonds [Member]
A collateralized debt obligation (backed by pledge, mortgage or other lien on the entity's assets).
Securitization Bonds Two [Member]
Securitization Bonds Two [Member]
A collateralized debt obligation (backed by pledge, mortgage or other lien on the entity's assets).
Securitization Bonds Three [Member]
Securitization Bonds Three [Member]
A collateralized debt obligation (backed by pledge, mortgage or other lien on the entity's assets).
Senior Unsecured Notes [Member]
Senior Unsecured Notes [Member]
A senior note is a bond that takes priority over other debt securities sold by the issuer, in the event the issuer goes bankrupt, senior debt holders receive priority for [must receive] repayment [prior] relative to junior and unsecured [general] creditors.
Senior Unsecured Notes Two [Member]
Senior Unsecured Notes Two [Member]
A senior note is a bond that takes priority over other debt securities sold by the issuer. In the event the issuer goes bankrupt, senior debt holders receive priority for [must receive] repayment [prior] relative to junior and unsecured (general) creditors.
Senior Unsecured Notes Three [Member]
Senior Unsecured Notes Three [Member]
A senior note is a bond that takes priority over other debt securities sold by the issuer. In the event the issuer goes bankrupt, senior debt holders receive priority for [must receive] repayment [prior] relative to junior and unsecured (general) creditors.
Money Pool Participant by Company Type [Axis]
Money Pool Participant by Company Type [Axis]
Money Pool Participant by Company Type.
Money Pool Participant by Company Type [Domain]
Money Pool Participant by Company Type [Domain]
Money Pool Participant by Company Type.
Utility [Member]
Utility [Member]
Utility Company.
Nonutility [Member]
Nonutility [Member]
Nonutility Company.
Direct Borrowing [Member]
Direct Borrowing [Member]
Direct Borrowing and Loans from and to Parent
Finite-Lived Intangible Assets by Major Class [Axis]
Finite-Lived Intangible Assets by Major Class [Axis]
Finite-Lived Intangible Assets, Major Class Name [Domain]
Finite-Lived Intangible Assets, Major Class Name [Domain]
Servicing Contracts [Member]
Servicing Contracts [Member]
Maximum Interest Rate
Maximum Interest Rate
The maximum weighted-average interest rate of funds outstanding at that time, calculated on a daily basis, either borrowed from or loaned to a Money Pool during the period. The Money Pool represents centralized funding mechanism AEP uses to meet the short-term cash requirements of certain subsidiaries.
Minimum Interest Rate
Minimum Interest Rate
The minimum weighted-average interest rate of funds outstanding at that time, calculated on a daily basis, either borrowed from or loaned to a Money Pool during the period. The Money Pool represents centralized funding mechanism AEP uses to meet the short-term cash requirements of certain subsidiaries.
Long-term Debt
Long-term Debt, Unclassified [Abstract]
Senior Unsecured Notes
Unsecured Debt
Pollution Control Bonds
Long-term Pollution Control Bond
Notes Payable
Other Notes Payable
Securitization Bonds
Secured Debt
Spent Nuclear Fuel Obligation
Spent Nuclear Fuel Obligation, Noncurrent
Other Long-term Debt
Other Long-term Debt
Total Long-term Debt Outstanding
Long-term Debt and Other Securities Issued, Retired and Principal Payments Made
Long term debt and other securities issued, retired and principal payments made [Abstract]
Long-term debt and other securities issued, retired and principal payments made.
Issuances
Proceeds from Issuance of Debt
Retirements and Principal Payments
Repayments of Long-term Debt
Interest Rate (Percentage)
Debt Instrument, Interest Rate, Stated Percentage
Interest Rate (Variable)
Debt Instrument Interest Variable Rate
The interest rate applicable to the portion of the carrying amount of long-term borrowings outstanding as of the balance sheet date, including current maturities, which accrues interest at a rate subject to change from time to time.
Due Date
Debt Instrument, Maturity Date 1
Date when the debt instrument is scheduled to be fully repaid, which may be presented in a variety of ways (year, month and year, day, month and year, quarter, etc.).
Money Pool Participants Money Pool Activity And Authorized Borrowing Limits
Money Pool Participants Money Pool Activity And Authorized Borrowing Limits [Abstract]
Money Pool Participants Money Pool Activity And Authorized Borrowing Limits [Abstract]
Maximum Borrowings from Money Pool
Maximum Borrowings from Money Pool
Maximum Borrowings from a Money Pool at anytime during the period. The Money Pool represents a centralized funding mechanism AEP uses to meet the short-term cash requirements of certain subsidiaries.
Maximum Loans to Money Pool
Maximum Loans to Money Pool
Maximum Loans to a Money Pool at anytime during the period. The Money Pool represents centralized funding mechanism AEP uses to meet the short-term cash requirements of certain subsidiaries.
Average Borrowings from Money Pool
Average Borrowings from Money Pool
Average Borrowings from a Money Pool during the period. The Money Pool represents centralized funding mechanism AEP uses to meet the short-term cash requirements of certain subsidiaries.
Average Loans to Money Pool
Average Loans to Money Pool
Average Loans to a Money Pool during the period. The Money Pool represents centralized funding mechanism AEP uses to meet the short-term cash requirements of certain subsidiaries.
Net Loans (Borrowings) to/from Money Pool
Related Party Transaction, Due from (to) Related Party
Borrowings from Parent
Borrowings from Parent
Borrowings from Parent at period end. Parent represents centralized funding mechanism AEP uses to meet the short-term cash requirements of certain subsidiaries.
Loans to Parent
Loans to Parent
Loans to Parent at period end. Parent represents centralized funding mechanism AEP uses to meet the short-term cash requirements of certain subsidiaries.
Authorized Short Term Borrowing Limit
Authorized Short Term Borrowing Limit
Authorized Short-term Borrowing Limit by regulatory orders.
Maximum and Minimum Interest Rates
Maximum and Minimum Interest Rates [Abstract]
Maximum and Minimum Interest Rates.
Maximum Interest Rate for Funds Borrowed
Maximum Interest Rate for Funds Borrowed
The maximum weighted-average interest rate of funds outstanding at that time, calculated on a daily basis, borrowed during the period.
Minimum Interest Rate For Funds Borrowed
Minimum Interest Rate For Funds Borrowed
The minimum weighted-average interest rate of funds outstanding at that time, calculated on a daily basis, borrowed during the period.
Maximum Interest Rate For Funds Loaned
Maximum Interest Rate For Funds Loaned
The maximum weighted-average interest rate of funds outstanding at that time, calculated on a daily basis, loaned during the period.
Minimum Interest Rate for Funds Loaned
Minimum Interest Rate for Funds Loaned
The minimum weighted-average interest rate of funds outstanding at that time, calculated on a daily basis, loaned during the period.
Average Interest Rates for Funds Borrowed From and Loaned to Money Pool
Average Interest Rates for Funds Borrowed From and Loaned to Money Pool [Abstract]
Average Interest Rates for Funds Borrowed From and Loaned to Money Pool.
Average Interest Rate For Funds Borrowed
Average Interest Rate For Funds Borrowed
The average interest rate for funds borrowed from a Money Pool during the period. The Money Pool represents centralized funding mechanism AEP uses to meet the short-term cash requirements of certain subsidiaries.
Average Interest Rate For Funds Loaned
Average Interest Rate For Funds Loaned
The average interest rate for funds loaned to a Money Pool during the period. The Money Pool represents centralized funding mechanism AEP uses to meet the short-term cash requirements of certain subsidiaries.
Securitized Debt for Receivables
Commercial Paper
Commercial Paper
Notes Payable
Notes Payable
Securitized Debt for Receivables
Short-term Debt, Weighted Average Interest Rate, at Point in Time
Weighted Average Interest Rate
Debt, Weighted Average Interest Rate
Comparative Accounts Receivable Information
Proceeds from Sale and Collection of Other Receivables [Abstract]
Effective Interest Rates on Securitization of Accounts Receivable
Effective Interest Rates on Securitization of Accounts Receivable
Effective interest rate on the amount owed for securitized accounts receivables.
Net Uncollectible Accounts Receivable Written Off
Net Uncollectible Accounts Receivable Written Off
Net uncollectible accounts receivable written off.
Customer Accounts Receivable Managed Portfolio
Customer Accounts Receivable Managed Portfolio [Abstract]
Customer accounts receivable managed portfolio.
Accounts Receivable Retained Interest and Pledged as Collateral Less Uncollectible Accounts
Accounts Receivable Retained Interest and Pledged as Collateral Less Uncollectible Accounts
Accounts receivables that have been pledged as collateral less uncollectible accounts as of the balance sheet date.
Total Principal Outstanding
Principal Amount Outstanding on Loans Held-for-sale or Securitization or Asset-backed Financing Arrangement
Delinquent Securitized Accounts Receivable
Delinquent Amount at End of Period on Loans Managed and Securitized or Asset-backed Financing Arrangement
Bad Debt Reserves Related to Securitization, Sale of Accounts Receivable
Bad Debt Reserves Related to Securitized Sale of Accounts Receivable
A valuation allowance for securitized receivables that are expected to be uncollectible.
Unbilled Receivables Related to Securitization, Sale of Accounts Receivable
Unbilled Receivables Related to Securitization, Sale of Accounts Receivable
The amount of revenue for work performed for which billing has not occurred related to securitization of accounts receivable.
Accounts Receivable and Accrued Unbilled Revenues
Receivables Held-for-sale [Abstract]
Accounts Receivable and Accrued Unbilled Revenues
Receivables Held-for-sale, Amount
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold [Abstract]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Proceeds from Sale of Receivables
Proceeds from Sale and Collection of Receivables [Abstract]
Proceeds from Sale of Receivables to AEP Credit
Proceeds from Sale of Finance Receivables
Financing Activities (Textuals)
Financing Activities Textuals [Abstract]
Financing Activities.
Trust Fund Assets One Time Fee Obligation for Nuclear Fuel Disposition
Trust Fund Assets One Time Fee Obligation for Nuclear Fuel Disposition
Trust fund assets one time fee obligation for nuclear fuel disposition.
Repayments of Long-term Debt
Reacquired Pollution Controls Bonds Held by Trustees
Auction Rate Tax Exempt Long Term Debt Outstanding
Securities that are debt instruments (corporate or municipal bonds) that typically have long-term nominal maturities for which the interest rate is reset through an auction process.
Sub-Limit of Secured Debt
Sub-Limit of Secured Debt
The amount of secured debt as a sub-limit to the amount of contractually defined priority debt as defined in the covenants for AEPTCo's note purchase agreements and indenture.
Maximum Percentage of Consolidated Tangible Net Assets
Maximum Percentage of Consolidated Tangible Net Assets
Maximum percentage of consolidated tangible net assets limit for debt as stated in the covenants in AEPTCO's note purchase agreements and indenture.
Maximum Percentage Debt to Capitalization
Maximum Percentage Debt to Capitalization
Maximum level of debt to capitalization persuant to credit agreement leverage restrictions.
Total Commitment from Bank Conduits to Finance Receivables
Total Commitment From Bank Conduits To Finance Receivables
Total commitment from bank conduits to finance receivables.
Commitment From Bank Conduits To Finance Receivables
Commitment From Bank Conduits To Finance Receivables
Commitment From Bank Conduits To Finance Receivables
July 2019 [Member]
July 2019 [Member]
July 2019 [Member]
June 2021 [Member]
June 2021 [Member]
June 2021 [Member]
June 2022 [Member]
June 2022 [Member]
June 2022
Guarantor Obligations by Nature [Axis]
Guarantor Obligations, Nature [Axis]
Guarantor Obligations, Nature [Domain]
Guarantor Obligations, Nature [Domain]
Letters of Credit [Member]
Letters of Credit [Member]
Letters of Credit Member.
Guarantees of Third Party Obligations [Member]
Guarantees of Third Party Obligations [Member]
Guarantees of Third Party Obligations Member.
Guarantees of Equity Method Investees [Member]
Guarantees of Equity Method Investees [Member]
Guarantees of Equity Method Investees [Member]
Master Lease Agreements [Member]
Master Lease Agreements [Member]
Master Lease Agreements Member.
Railcar Lease [Member]
Railcar Lease [Member]
Lease Type Three.
Boat and Barge Leases [Member]
Boat and Barge Leases [Member]
Boat and Barge Leases [Member]
Maximum Potential Amount of Future Payments Associated with Guarantee
Maximum Potential Amount of Future Payments Associated with Guarantee
Maximum Potential Amount of Future Payments Associated with Guarantee
Maximum Future Payments for Letters of Credit [Abstract]
Maximum Future Payments for Letters of Credit [Abstract]
Maximum Future Payments for Letters of Credit Issued Under the Uncommitted Facility
Maximum Future Payments for Letters of Credit Issued Under the Uncommitted Facility
Maximum future payments for Letters of Credit issued under the uncommitted facility.
Pollution Control Bonds Supported by Bilateral Letters of Credit [Abstract]
Pollution Control Bonds Supported by Bilateral Letters of Credit [Abstract]
Variable Rate PCBs Supported
Variable Rate PCBs Supported
Amount of Pollution Control Bonds supported by bilateral letters of credit.
Maximum Potential Loss on Master Lease Agreements [Abstract]
Maximum Potential Loss on Master Lease Agreements [Abstract]
Max Potential Loss on Master Lease Agreements
Max Potential Loss on Master Lease Agreements
Maximum potential loss on master lease agreements.
Commitments, Guarantees and Contingencies (Textuals) [Abstract]
Commitments Guarantees And Contingencies Textuals [Abstract]
Commitments, Guarantees and Contingencies.
Revolving Credit Facilities
Credit Facilities Structured
Amount of revolving credit facilities.
Letters of Credit Limit
Line of Credit Facility, Maximum Borrowing Capacity
Uncommitted Facility
Uncommitted Facility
Amount of letters of credit drawn on an uncommitted credit facility.
Bilateral Letters of Credit, Matured
Bilateral Letters of Credit, Matured
The amount of bilateral letters of credit matured as of reporting date.
Guarantees of Mine Reclamation, Amount
Guarantees Of Mine Reclamation Amount
Guarantees of mine reclamation, amount.
Estimated Final Cost Mine Reclamation
Mine Reclamation and Closing Liability, Noncurrent
Total Amount Collected through a Rider for Final Mine Closure and Reclamation Costs
Amount Collected Through Rider For Final Mine Closure And Reclamation Costs
Total amount collected through a rider for final mine closure and reclamation costs.
Amount Collected through a Rider for Final Mine Closure - ARO Noncurrent
Amount Collected, Rider Mine Close ARO Noncurrent
Amount collected through a rider for final mine closure and reclamation costs recorded in asset retirement obligations
Amount Collected, Rider Mine Close Other Assets Noncurrent
Amount Collected, Rider Mine Close Other Assets Noncurrent
Amount collected through a rider for final mine closure and reclamation costs recorded in deferred charges and other noncurrent assets.
Future Minimum Lease Obligations for Remaining Railcars
Operating Leases, Future Minimum Payments Due
Guaranteed Sales Proceeds Percentage of Fair Value to Lessor End of Max Lease Term
Sale Proceeds Guaranteed by Lessor at End of Twenty Year Term
Sale proceeds guaranteed by lessor at the end of 20-year term.
Maximum Potential Loss on Guarantee
Maximum Potential Loss Related to Guarantee
Maximum potential loss related to the guarantee.
Maximum Potential Lease Payments, AEPRO Barge and Boat Leases
Maximum Potential Lease Payments, AEPRO Barge and Boat Leases
Future potential lease obligations under guaranteed AEPRO boat and barge leases.
Guarantee Liability related to AEPRO Boat and Barge Leases
Guarantor Obligations, Current Carrying Value
Guarantee Liability related to AEPRO Boat and Barge Leases - Other Current Liabilities
GuaranteeObligationsCurrentCarryingValueOtherLiabilitiesCurrent
The current carrying amount of the liability for the freestanding or embedded guarantor's obligations under the guarantee or each group of similar guarantees recorded under Other Current Liabilities.
Guarantee Liability related to AEPRO Boat and Barge Leases - Other Noncurrent Liabilities
GuaranteeObligationsCurrentCarryingValueOtherLiabilitiesNoncurrent
The current carrying amount of the liability for the freestanding or embedded guarantor's obligations under the guarantee or each group of similar guarantees under Other Noncurrent Liabilities.
Consolidated Entities [Axis]
Consolidated Entities [Axis]
Consolidated Entities [Domain]
Consolidated Entities [Domain]
AEP Subsidiaries [Member]
Subsidiaries [Member]
Variable Interest Entity, Classification [Domain]
AEP Texas Central Transition Funding Co [Member]
AEP Texas Central Transition Funding Co [Member]
AEP Texas Central Transition Funding Company Variable Interest Entity Member
Ohio Phase-In-Recovery Funding [Member]
Ohio Phase-In-Recovery Funding [Member]
Ohio Phase-In-Recovery Funding Variable Interest Entity Member
Sabine Mining Co [Member]
Sabine Mining Co [Member]
Sabine Mining Company Variable Interest Entity Member
DCC Fuel [Member]
DCC Fuel [Member]
DCC Fuel Variable Interest Entity Member
Other Noncurrent Assets
Securitized Transition Assets
Common Stock, No Par Value
Common Stock, No Par Value
Common Stock, Par Value Per Share
Common Stock, Par or Stated Value Per Share
Common Stock, Shares Authorized
Common Stock, Shares Authorized
Common Stock, Shares, Issued
Common Stock, Shares, Issued
Common Stock, Shares Outstanding
Common Stock, Shares, Outstanding
Treasury Stock, Shares
Treasury Stock, Shares
Discontinued Operations and Disposal Groups [Abstract]
Impairment, Disposition and Assets and Liabilities Held for Sale
Disposal Groups, Including Discontinued Operations, Disclosure [Text Block]
Changes in Accumulated Other Comprehensive Income (Loss) by Component
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]
Disaggregated Revenues from Contracts with Customers
Disaggregation of Revenue [Table Text Block]
Fixed Performance Obligations
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table Text Block]
Affiliated Accounts Receivable Contracts with Customers
Affiliated Accounts Receivable Contracts with Customers [Table Text Block]
Tabular disclosure of affiliated accounts receivable contracts with customers.
Income Statement [Abstract]
Vertically Integrated Utilities [Member]
Transmission and Distribution Utilities [Member]
Generation and Marketing [Member]
Fuel and Other Consumables Used for Electric Generation [Member]
Purchased Electricity for Resale [Member]
Electricity, Purchased [Member]
Revenues
Revenues [Abstract]
Other Revenues - Affiliated
Related Party Transaction, Other Revenues from Transactions with Related Party
TOTAL REVENUES
Expenses
Operating Expenses [Abstract]
Cost of Goods and Services Sold
Cost of Goods and Services Sold
Purchased Electricity from AEP Affiliates
Cost of Purchased Power from Affiliate
Cost of electricity purchased as well as fuel used to generate electricity used in operations and sold during the reporting period from affiliate.
Amortization of Generation Deferrals
Amortization Of Generation Deferrals
Amortizations related to recoveries of pre-2012 deferred fuel balances that are recovered by the Phase In Recovery Rider. Amortizations related to recoveries of deferred capacity costs that are recovered by the Retail Stability Rider ($4.00/MWh recovery of previously deferred OPCo capacity costs and previously deferred carrying costs per Case No. 14-1186-EL-RDR & March 2017 through June 2019 monthly amortization of remaining RSR capacity costs using the appropriate incremental rate multiplied by the current monthly RSR rider revenue).
Other Operation
Utilities Operating Expense, Operations
Maintenance
Utilities Operating Expense, Maintenance
Gain on Sale of Merchant Generation Assets
Gain on Sale of Merchant Generation Assets
Amount of gain (loss) on sale of Merchant Generation Assets.
Depreciation and Amortization
Utilities Operating Expense, Depreciation and Amortization
Taxes Other Than Income Taxes
Taxes, Miscellaneous
TOTAL EXPENSES
Operating Expenses
OPERATING INCOME (LOSS)
Operating Income (Loss)
Other Income (Expense):
Other Nonoperating Income (Expense) [Abstract]
Interest and Investment Income
Investment Income, Net
Carrying Costs Income
Carrying Costs Income
Income recorded to accrue a return on certain regulatory assets as granted by a regulator.
Allowance for Equity Funds Used During Construction
Public Utilities, Allowance for Funds Used During Construction, Capitalized Cost of Equity
Other Income
Other Nonoperating Income (Expense)
Non-Service Cost Components of Net Periodic Benefit Cost
Net Periodic Defined Benefits Expense (Reversal of Expense), Excluding Service Cost Component
Gain (Loss) on Disposition of Stock in Subsidiary or Equity Method Investee
Gain (Loss) on Disposition of Stock in Subsidiary or Equity Method Investee
Interest Expense
INCOME BEFORE INCOME TAX EXPENSE AND EQUITY EARNINGS
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest
Income Tax Expense (Credit)
Equity Earnings (Loss) of Unconsolidated Subsidiaries
Income (Loss) from Equity Method Investments
Net Income (Loss)
Net Income Attributable to Noncontrolling Interests
Net Income (Loss) Attributable to Noncontrolling Interest
Earnings Attributable to Common Shareholders
Net Income (Loss) Available to Common Stockholders, Basic
Earnings Per Share
Earnings Per Share [Abstract]
Weighted Average Number of Basic AEP Common Shares Outstanding
Weighted Average Number of Shares Outstanding, Basic
Basic Earnings Per Share Attributable to AEP Common Shareholders from Continuing Operations
Income (Loss) from Continuing Operations, Per Basic Share
Total Basic Earnings Per Share Attributable to AEP Common Shareholders
Earnings Per Share, Basic
Weighted Average Number of Diluted AEP Common Shares Outstanding
Weighted Average Number of Shares Outstanding, Diluted
Diluted Earnings Per Share Attributable to AEP Common Shareholders from Continuing Operations
Income (Loss) from Continuing Operations, Per Diluted Share
Total Diluted Earnings Per Share Attributable to AEP Common Shareholders
Earnings Per Share, Diluted
Common Stock, Dividends Per Share, Declared
Common Stock, Dividends, Per Share, Declared
Statement of Cash Flows [Abstract]
Operating Activities
Net Cash Provided by (Used in) Operating Activities [Abstract]
Net Income (Loss)
Adjustments to Reconcile Net Income to Net Cash Flows from (Used for) Operating Activities:
Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract]
Amortization Of Generation Deferrals
Deferred Income Taxes
Deferred Income Tax Expense (Benefit)
Deferral of Incremental Nuclear Refueling Outage Expenses, Net
Deferral of Incremental Nuclear Refueling Outage Expenses, Net
The net cash inflow or outflow due to Cook Unit 1 & 2 refueling outage levelization.
Carrying Costs Income
Allowance for Equity Funds Used During Construction
Mark-to-Market of Risk Management Contracts
Unrealized Gain (Loss) on Derivatives
Amortization of Nuclear Fuel
Amortization of Nuclear Fuel
The expense charged against earnings for the periodic recognition of nuclear fuel usage.
Pension Contributions to Qualified Plan Trust
Payment for Pension Benefits
Property Taxes
Amortization of Deferred Property Taxes
Change in Regulatory Asset – Catastrophe Reserve
Change in Regulatory Asset - Catastrophe Reserve
The change in regulatory asset balance specifically related to a catastrophe reserve for storm damage.
Long-term Accounts Receivable - Affiliated
Increase (Decrease) in Accounts Receivable, Related Parties
Deferred Fuel Over/Under-Recovery, Net
Fuel Over Under Recovery Net
The net change during the reporting period in the value of the asset (liability) created by an (over) under recovery of fuel costs. An over recovery represents the excess of fuel revenues billed to customers over fuel costs incurred and an under recovery represents excess fuel costs incurred over fuel revenues billed to customers.
Provision for Refund
Provision for Refund
Provision for Refund
Gain (Loss) on Disposition of Stock in Subsidiary or Equity Method Investee
Recovery of Ohio Capacity Costs, Net
Deferral Of Ohio Capacity Costs
The increase (decrease) during the reporting period in amounts for the net under recovery of capacity deferrals related to the differential between $189/MW-day capacity cost and RPM (reliability pricing model) pricing.
Provision for Refund - Global Settlement
Provision for Refund - Global Settlement
Provisions for refund for obligations to customers as a result of the OPCo Global Settlement.
Change in Regulatory Assets
Change in Regulatory Assets
The increase (decrease) during the reporting period in regulatory assets.
Change in Other Noncurrent Assets
Increase (Decrease) in Other Noncurrent Assets
Change in Other Noncurrent Liabilities
Changes in Certain Components of Working Capital:
Increase (Decrease) in Operating Capital [Abstract]
Accounts Receivable, Net
Increase (Decrease) in Accounts and Other Receivables
Fuel, Materials and Supplies
Increase (Decrease) in Inventories
Accounts Payable
Increase (Decrease) in Accounts Payable
Customer Deposits
Increase (Decrease) in Customer Deposits
Accrued Taxes, Net
Increase (Decrease) in Accrued Taxes Payable
Accrued Interest
Increase (Decrease) in Interest Payable, Net
Other Current Assets
Increase (Decrease) in Other Current Assets
Other Current Liabilities
Net Cash Flows from (Used for) Operating Activities
Net Cash Provided by (Used in) Operating Activities
Investing Activities
Net Cash Provided by (Used in) Investing Activities [Abstract]
Construction Expenditures
Payments for Construction in Process
Change in Advances to Affiliates, Net
Increase (Decrease) in Notes Receivable, Related Parties
Acquisitions of Assets
Payments to Acquire Property, Plant, and Equipment
Purchases of Investment Securities
Payments to Acquire Investments
Sales of Investment Securities
Proceeds from Sale, Maturity and Collection of Investments
Acquisitions of Nuclear Fuel
Payments for Nuclear Fuel
Proceeds From Sale Of Merchant Generation Assets
Proceeds From Sale Of Merchant Generation Assets
The cash inflow from the sale of certain merchant generation assets.
Other Investing Activities
Payments for (Proceeds from) Other Investing Activities
Net Cash Flows from (Used for) Investing Activities
Net Cash Provided by (Used in) Investing Activities
Financing Activities
Net Cash Provided by (Used in) Financing Activities [Abstract]
Capital Contributions from Parent
Proceeds from Contributions from Parent
Issuance of Common Stock, Net
Proceeds from Issuance of Common Stock
Issuance of Long-term Debt
Proceeds from Issuance of Long-term Debt
Commercial Paper and Credit Facility Borrowings
Proceeds from Short-term Debt, Maturing in More than Three Months
Change in Short-term Debt, Net
Proceeds from (Repayments of) Short-term Debt, Maturing in Three Months or Less
Change in Advances from Affiliates, Net
Increase (Decrease) in Notes Payable, Related Parties
Retirement of Long-term Debt
Commercial Paper and Credit Facility Repayments
Repayments of Short-term Debt, Maturing in More than Three Months
Make Whole Premium on Extinguishment of Long-term Debt
Make Whole Premium on Extinguishment of Long-term Debt
The cash outflow for a make whole premium on long-term debt extinguished early.
Principal Payments for Capital Lease Obligations
Repayments of Long-term Capital Lease Obligations
Dividends Paid on Common Stock
Payments of Distributions to Affiliates
Dividends Paid on Common Stock
Payments of Ordinary Dividends, Common Stock
Other Financing Activities
Proceeds from (Payments for) Other Financing Activities
Net Cash Flows from (Used for) Financing Activities
Net Cash Provided by (Used in) Financing Activities
Net Increase (Decrease) in Cash, Cash Equivalents and Restricted Cash
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect
Net Increase (Decrease) in Cash and Cash Equivalents
Cash and Cash Equivalents, Period Increase (Decrease)
Cash, Cash Equivalents and Restricted Cash at Beginning of Period
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents
Cash and Cash Equivalents at Beginning of Period
Cash, Cash Equivalents and Restricted Cash at End of Period
Cash and Cash Equivalents at End of Period
Supplementary Information
Supplemental Cash Flow Information [Abstract]
Cash Paid for Interest, Net of Capitalized Amounts
Interest Paid, Excluding Capitalized Interest, Operating Activities
Net Cash Paid (Received) for Income Taxes
Income Taxes Paid, Net
Noncash Acquisitions Under Capital Leases
Capital Lease Obligations Incurred
Construction Expenditures Included in Current Liabilities as of September 30,
Construction in Progress Expenditures Incurred but Not yet Paid
Construction Expenditures Included in Noncurrent Liabilities as of September 30,
Capital Expenditures Incurred but Not yet Paid
Acquisition of Nuclear Fuel Included in Current Liabilities as of September 30,
Acquisition Of Nuclear Fuel Included In Current Liabilities
Future cash outflow to pay for acquired nuclear fuel.
Noncash Contribution of Assets by Noncontrolling Interest
Noncash or Part Noncash Acquisition, Investments Acquired
Expected Reimbursement for Spent Nuclear Fuel Dry Cask Storage
Expected Reimbursement For Spent Nuclear Fuel Dry Cask Storage
Future cash inflow for nuclear fuel dry cask storage reimbursement from the DOE.
Consolidated Assets And Liabilities Of Variable Interest Entities
Consolidated Assets And Liabilities Of Variable Interest Entities [Table Text Block]
Schedule of consolidated assets and liabilities of variable interest entities.
Gain Contingencies, Nature [Axis]
Gain Contingencies, Nature [Axis]
Gain Contingency, Nature [Domain]
Gain Contingency, Nature [Domain]
Virginia Legislation Affecting Earnings Reviews [Member]
Virginia Legislation Affecting Biennial Reviews [Member]
Virginia Legislation Affecting Biennial Reviews [Member]
Virginia Tax Reform [Member]
Virginia Tax Reform [Member]
Virginia Tax Reform [Member]
2018 West Virginia Base Rate Case [Member]
2018 West Virginia Base Rate Case [Member]
2018 West Virginia Base Rate Case [Member]
Indiana Base Rate Case - 2017 [Member]
Indiana Base Rate Case - 2017 [Member]
Indiana Base Rate Case - 2017 [Member]
Michigan Base Rate Case - 2017 [Member]
2017 Michigan Base Rate Case [Member]
2017 Michigan Base Rate Case [Member]
Michigan Tax Reform [Member]
Michigan Tax Reform [Member]
Michigan Tax Reform [Member]
Rockport Plant, Unit 2 Selective Catalytic Reduction [Member]
Rockport Plant, Unit 2 Selective Catalytic Reduction [Member]
Rockport Plant, Unit 2 Selective Catalytic Reduction [Member]
Kentucky Base Rate Case - 2017 [Member]
2017 Kentucky Base Rate Case [Member]
2017 Kentucky Base Rate Case [Member]
Kentucky Tax Reform [Member]
Kentucky Tax Reform [Member]
Kentucky Tax Reform [Member]
Ohio Electric Security Plan Filing [Member]
Ohio Electric Security Plan Filing [Member]
Ohio Electric Security Plan Filing
2016 SEET Filing [Member]
2016 SEET Filing [Member]
2016 SEET Filing [Member]
PJM Transmission Rates [Member]
PJM Transmission Rates [Member]
PJM Transmission Rates [Member]
FERC Transmission Complaint - AEP PJM Participants [Member]
FERC Transmission Complaint [Member]
FERC Transmission Complaint [Member]
Current Regulatory Assets [Axis]
Current Regulatory Assets [Axis]
Current Regulatory Assets [Axis]
Current Regulatory Assets [Domain]
Current Regulatory Assets [Domain]
Current Regulatory Assets [Domain]
Fuel Expenses Not to be Recovered
Fuel Expenses Not to be Recovered
If Legislation is passed it would cause Apco to not recover fuel expenses incurred after July 1, 2018.
Reduction in Annual Base Rates
Reduction in Annual Base Rates
If Legislation is passed it will reduce annual base rates.
Energy Efficiency Programs to be Requested from the Virginia SCC Through July, 2028 Dollars
EnergyEfficiencyProgramsToBeRequestedFromTheVirginiaSCCThroughJuly,2028dollars
Amount of Energy Efficiency programs to be reqeusted from the Virginia SCC, in dollars, from July 1, 2018 through July 1, 2028.
Energy Efficiency Programs to be Requested from the Virginia SCC Through July, 2028 MWs
EnergyEfficiencyProgramsToBeRequestedFromTheVirginiaSCCThroughJuly,2028MWs
Amount of Energy Efficiency programs to be reqeusted from the Virginia SCC, in MWs, from July 1, 2018 through July 1, 2028.
Refund for Excess ADIT Not Subject to Rate Normalization Requirements to Offset Fuel
Refund for Excess ADIT Not Subject to Rate Normalization Requirements to Offset Fuel
Amount of refund to be given through a rider related to Excess ADIT Not Subject to Rate Normalization Requirements that will help offset increase in interim fuel rates.
Regulatory Assets Used to Offset Tax Savings and Excess ADIT Due to Tax Reform
Regulatory Assets Used to Offset Tax Savings and Excess ADIT Due to Tax Reform
Amount of regulatory assets used to offset tax savings and Excess ADIT due to Tax Reform.
Amount Of Annual Reduction To Customer Bills Through Credit Adjustment Rider
Amount Of Annual Reduction To Customer Bills Through Credit Adjustment Rider
he amount of an annual reduction possible related to a credit adjustment rider for certain capital expenditures.
Amount of Increase Related to Amortization of Regulatory Assets
Amount of Increase Related to Amortization of Regulatory Assets
Amount of increase related to amortization of regulatory assets.
Adjusted Annual Increase Request due to Tax Reform
Adjusted Annual Increase Request due to Tax Reform
Decrease in original requested annul increase due to tax reform
Staff Recommended Annual Increase
Staff Recommended Annual Increase
Amount of increase recommended by the Staff.
Staff Recommended Return on Common Equity
Staff Recommended Return on Common Equity
Amount of return on equity recommended by the Staff.
Intervenor Recommended Annual Decrease
Intervenor Recommended Annual Decrease
Amount of decrease recommended by intervenors.
Settled Annual Increase
Setlled Annual Increase
Settled amount for increase in annual rates
Settled Return on Common Equity
Settled Return on Common Equity
Settled amount for increase in common equity
Original Sharing of Off-System Sales Margins
Original Sharing of Off-System Sales Margins
Percent of Off-System Sales margins shared prior to settlement
Settled Sharing of Off-System Sales Margins
Settled Sharing of Off-System Sales Margins
Percent of Off-System Sales margins shared after settlement
Refund for Impact of Tax Reform
Refund for Impact of Tax Reform
Amount to be refunded from July through December 2018 for the impact of Tax Reform for the period of January through June 2018.
ALJ Recommended Annual Increase
ALJ Recommended Annual Increase
Increase in rates recommended by ALJ
Cost of New Entry Value
Cost of New Entry Value
The hypothetical cost of a new CC or CT
ALJ Recommended Return on Common Equity
ALJ Recommended Return on Common Equity
Increase in common equity recommended by ALJ
Alternate Supplier Cap
Alternate Supplier Cap
Alternate Supplier cap to begin February 2019
Reduced Capacity Charge Pretax Loss
Reduced Capacity Charge Pretax Loss
Pretax loss as a result of reduced capacity charges
Approved Annual Revenue Increase
Approved Annual Revenue Increase
Amount of approved annual revenue increase.
Approved Return On Equity
Approved Return On Equity
Approved return on equity.
Approved Capital Costs
Approved Capital Costs
Approved capital costs of property, plant and equipment.
KPSC Order Annual Revenue Increase
KPSC Order Annual Revenue Increase
Annual revenue increase as a result of KPSC order
KPSC Order Return on Common Equity
KPSC Order Return on Common Equity
Return on common equity as a result of KPSC order
KPSC Order Annual Revenue Reduction due to Tax Reform
KPSC Order Annual Revenue Reduction due to Tax Reform
Decrease in annual revenues requested due to tax reform
KPSC Order Deferral of Rockport Plant Unit Power Agreement Expenses
KPSC Order Deferral of Rockport Plant Unit Power Agreement Expenses
Approved Deferral of Rockport Plant Unit Power Agreement Expenses as a result of KPSC order
Recovery/Return of certain PJM OATT Expenses Above/Below Corresponding Level Recovered in Rates
Recovery/Return of certain PJM OATT Expenses Above/Below Corresponding Level Recovered in Rates
Percent of Recovery/Return of certain PJM OATT Expenses Above/Below Corresponding Level Recovered in Rates
KPCo Request for Additional Revenue Increase
KPCo Request for Additional Revenue Increase
Additional annual revenue request
KPSC Order Additional Annual Revenue Increase
KPSC Order Additional Annual Revenue Increase
KPSC approved additional annual revenue
PUCO Approved Reduced Customer Credits
PUCO Approved Reduced Customer Credits
PUCO-approved amount of reduced customer credits.
Solar Energy Projects To Be Developed And Implemented By 2021 As Proposed In Stipulation Agreement
Solar Energy Projects To Be Developed And Implemented By 2021 As Proposed In Stipulation Agreement
Solar energy projects to be developed and implemented by 2021 as proposed in stipulation agreement (in MWs).
Wind Energy Projects To Be Developed And Implemented By 2021 As Proposed In Stipulation Agreement
Wind Energy Projects To Be Developed And Implemented By 2021 As Proposed In Stipulation Agreement
Wind energy projects to be developed and implemented by 2021 as proposed in stipulation agreement (in MWs).
Percentage of Output to be Received from Solar and Wind Projects as Proposed in Stipulation Agreement
Percentage of Output to be Received from Solar and Wind Projects as Proposed in Stipulation Agreement
Percentage of output to be received from solar and wind projects as proposed in stipulation agreement.
Maximum Ownership Percentage of Solar and Wind Projects as Proposed in Stipulation Agreement
Maximum Ownership Percentage of Solar and Wind Projects as Proposed in Stipulation Agreement
Maximum ownership percentage of solar and wind projects as proposed in stipulation agreement.
Return on Common Equity Filed in the Pending Stipulation Agreement
Return on Common Equity Filed in the Pending Stipulation Agreement
Return on common equity filed during August 2017 in the pending stipulation agreement.
Rate Caps Related to the Distribution Investment Rider Range
Rate Caps Related to the Distribution Investment Rider Range
Rate caps related to OPCo's Distribution Investment Rider range for the periods 2018 through 2021.
Intervenor Recommended Refund to Customers
Intervenor Recommended Refund to Customers
Amount of refund to customers recommended by an intervenor
Amount of RTEP Refunds Recorded to Customer Accounts Receivable
Amount of RTEP Refunds Recorded to Customer Accounts Receivable
Amount of RTEP Refunds that were recorded to Customer Accounts Receivable
Amount of RTEP Refunds Recorded to Deferred Charges and Other Noncurrent Assets
Amount of RTEP Refunds Recorded to Deferred Charges and Other Noncurrent Assets
Amount of RTEP Refunds that were recorded to Deferred Charges and Other Noncurrent Assets
Return On Common Equity Per Settlement Agreement
Return On Common Equity Per Settlement Agreement
Return on common equity per the settlement agreement.
Return on Common Equity Inclusive of RTO Per Settlement Agreement
Return on Common Equity Inclusive of RTO Per Settlement Agreement
Settlement agreement filed with the FERC on return on common equity inclusive of RTO
RTO Incentive Adder Per Settlement Agreement
RTO Incentive Adder Per Settlement Agreement
Percent amount of RTO incentive adder included in settlement agreement filed with the FERC.
One Time Refund to Customers Per Settlement Agreement
One Time Refund to Customers Per Settlement Agreement
Settlement agreement filed with the FERC for a one time refund to customers
Increased Cap on Equity Portion of the Capital Structure Per Settlement Agreement
Increased Cap on Equity Portion of the Capital Structure Per Settlement Agreement
Increased cap on equity portion of the capital structure as part of settlement agreement filed at the FERC
Original Cap on Equity Portion of the Capital Structure Prior to Settlement Agreement
Original Cap on Equity Portion of the Capital Structure Prior to Settlement Agreement
The original cap on equity portion of the capital structure prior to settlement agreement.
Second Intervenor Recommended One Time Refund to Customers
Second Intervenor Recommended One Time Refund to Customers
Recommended one time refund to customers filed by second set of intervenors.
FERC Trial Staff Recommended Return on Common Equity
FERC Trial Staff Recommended Return on Common Equity
Return on common equity recommended by the FERC Trial Staff
FERC Trial Staff Recommended One Time Refund to Customers
FERC Trial Staff Recommended One Time Refund to Customers
One time refund to customers recommended by the FERC Trial Staff
Revision [Axis]
Restatement [Axis]
Revision [Domain]
Restatement [Domain]
Previously Reported [Member]
Previously Reported [Member]
Revision [Member]
Restatement Adjustment [Member]
Antidilutive Securities [Axis]
Antidilutive Securities [Axis]
Antidilutive Securities, Name [Domain]
Antidilutive Securities, Name [Domain]
Restricted Stock Units and Performance Share Units [Member]
Restricted Stock Units and Performance Share Units [Member]
Basic and Diluted EPS Calculations
Amounts Attributable to AEP Common Shareholders
Net Income (Loss) Available to Common Stockholders, Basic [Abstract]
Net Income Attributable to Noncontrolling Interests
Net Income (Loss) Available to Common Stockholders, Basic
Weighted Average Number of Basic AEP Common Shares Outstanding
Weighted Average Dilutive Effect of:
Incremental Weighted Average Shares Attributable to Dilutive Effect [Abstract]
Weighted Average Dilutive Effect of Shares
Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements
Dilutive Securities, Effect on Basic Earnings Per Share
Dilutive Securities 1
Includes adjustments resulting from the assumption that dilutive convertible securities were converted, options or warrants were exercised, or that other shares were issued upon the satisfaction of certain conditions.
Weighted Average Number of Diluted AEP Common Shares Outstanding
Organization and Summary of Significant Accounting Policies (Textuals) [Abstract]
Organization and Summary of Significant Accounting Policies Textuals [Abstract]
Organization and Summary of Significant Accounting Policies.
Antidilutive Shares Outstanding
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount
Income (Loss) from Equity Method Investments Adjustment
Income (Loss) from Equity Method Investments Adjustment
This item represents an adjustment to the entity's proportionate share for the period of the net income (loss) of its investee (such as unconsolidated and joint ventures) to which the equity method of accounting is applied.
Retained Earnings (Accumulated Deficit)
Error Corrections and Prior Period Adjustments, Description
Error Corrections and Prior Period Adjustments, Description
Income Statement [Abstract]
Revenues
Interest Expense
Liabilities [Abstract]
Liabilities [Abstract]
Liabilities, Current [Abstract]
TOTAL LIABILITIES
Equity [Abstract]
Equity [Abstract]
Statement of Cash Flows [Abstract]
Operating Activities
Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract]
Net Cash Provided by (Used in) Investing Activities [Abstract]
Net Cash Provided by (Used in) Investing Activities
Net Cash Provided by (Used in) Financing Activities [Abstract]
Net Cash Provided by (Used in) Financing Activities
Supplementary Information [Abstract]
Supplementary Information [Abstract]
Supplementary Information.
Construction Expenditures Included in Current Liabilities as of September 30,
Cash, Cash Equivalents and Restricted Cash [Abstract]
Cash, Cash Equivalents and Restricted Cash [Abstract]
Cash, Cash Equivalents and Restricted Cash [Abstract]
Total Cash, Cash Equivalents and Restricted Cash
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Including Disposal Group and Discontinued Operations
Total Cash, Cash Equivalents and Restricted Cash
Organization and Summary of Significant Accounting Policies Textuals [Abstract]
Public Utilities, General Disclosures [Abstract]
Rate Matters
Public Utilities Disclosure [Text Block]
Document and Entity Information [Abstract]
Document And Entity Information.
Entities [Table]
Entities [Table]
Entity Registrant Name
Entity Registrant Name
Entity Central Index Key
Entity Central Index Key
Document Type
Document Type
Document Period End Date
Document Period End Date
Amendment Flag
Amendment Flag
Document Fiscal Year Focus
Document Fiscal Year Focus
Document Fiscal Period Focus
Document Fiscal Period Focus
Current Fiscal Year End Date
Current Fiscal Year End Date
Entity Filer Category
Entity Filer Category
Entity Emerging Growth Company
Entity Emerging Growth Company
Entity Small Business
Entity Small Business
Entity Common Stock, Shares Outstanding
Entity Common Stock, Shares Outstanding
Derivatives and Hedging
Derivatives, Policy [Policy Text Block]
Variable Interest Entities
Consolidation, Variable Interest Entity, Policy [Policy Text Block]
Reclassification out of Accumulated Other Comprehensive Income [Axis]
Reclassification out of Accumulated Other Comprehensive Income [Axis]
Reclassification out of Accumulated Other Comprehensive Income [Domain]
Reclassification out of Accumulated Other Comprehensive Income [Domain]
Reclassifications from Accumulated Other Comprehensive Income [Member]
Reclassification out of Accumulated Other Comprehensive Income [Member]
Equity Components [Axis]
Equity Components [Axis]
Equity Component [Domain]
Equity Component [Domain]
Cash Flow Hedges [Member]
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member]
Securities Available for Sale [Member]
Accumulated Net Investment Gain (Loss) Attributable to Parent [Member]
Pension and OPEB [Member]
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]
Accumulated Other Comprehensive Income [Member]
AOCI Attributable to Parent [Member]
Changes in Accumulated Other Comprehensive Income (Loss) by Component
Changes In Accumulated Other Comprehensive Income by Component [Abstract]
Beginning Balance in AOCI
Change in Fair Value Recognized in AOCI
Other Comprehensive Income Unrealized Gain Loss Arising During Period Net Of Tax
Net of tax amount, before reclassification adjustments, of the change in accumulated gain (loss).
Reclassifications From Accumulated Other Comprehensive Income
Reclassifications From Accumulated Other Comprehensive Income [Abstract]
Commodity
Purchased Electricity for Resale
Generation & Marketing Revenues
Interest Rate
Interest Rate [Abstract]
Amortization Of Pension And Other Postretirement Benefit Plans
Amortization Of Pension And Other Postretirement Benefit Plans [Abstract]
Amortization of Prior Service Cost (Credit)
Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), Reclassification Adjustment from AOCI, before Tax
Amortization of Actuarial (Gains)/Losses
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, before Tax
Reclassification from AOCI, before Income Tax (Expense) Credit
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax
Income Tax (Expense) Credit
Reclassification from AOCI, Net of Income Tax (Expense) Credit
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax
Net Current Period Other Comprehensive Income (Loss)
Other Comprehensive Income (Loss), Net of Tax
ASU 2018-02 Adoption
Stockholders Equity ASU 2018-02 Adoption
This element represents movements included in the statement of changes in stockholders' equity which are specifically related to the adoption of ASU 2018-02.
ASU 2016-01 Adoption
Stockholders Equity ASU 2016-01 Adoption
This element represents movements included in the statement of changes in stockholders' equity which are specifically related to the adoption of ASU 2016-01.
Ending Balance in AOCI
Variable Interest Entities
Variable Interest Entity Disclosure [Text Block]
Notional Volume of Derivative Instruments
Schedule of Notional Amounts of Outstanding Derivative Positions [Table Text Block]
Fair Value of Derivative Instruments
Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block]
Amount of Gain (Loss) Recognized on Risk Management Contracts
Schedule of Derivative Instruments Included in Trading Activities [Table Text Block]
Impact of Fair Value Hedges on the Condensed Balance Sheet
Impact of Fair Value Hedges on Balance Sheet [Table Text Block]
Impact of Fair Value Hedges on Condensed Balance Sheet [Table Text Block]
Gain (Loss) on Hedging Instruments
Derivative Instruments, Gain (Loss) [Table Text Block]
Impact of Cash Flow Hedges on the Condensed Balance Sheet
Impact of Cash Flow Hedges on Balance Sheet [Text Block]
Tabular disclosure of the impact of cash flow hedges on the balance sheet.
Liabilities Subject to Cross Default Provisions
Cross Default Provision [Text Block]
Tabular disclosure of liabilities subject to cross default provisions.
Commitments, Guarantees and Contingencies
Commitments Contingencies and Guarantees [Text Block]
Basic and Diluted EPS Calculations
Earnings Per Share [Text Block]
Revision to Prior Year Income
Restatement to Prior Year Income [Table Text Block]
Schedule of Error Corrections and Prior Period Adjustments
Schedule of Error Corrections and Prior Period Adjustments [Table Text Block]
Supplementary Information
Supplementary Information [Text Block]
Supplementary Information.
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]
New Accounting Pronouncements
Schedule of New Accounting Pronouncements and Changes in Accounting Principles [Table Text Block]
Business Segments
Segment Reporting Disclosure [Text Block]
Schedule of Trading Securities and Other Trading Assets, Major Types of Trading Securities and Assets [Axis]
Financial Instrument [Axis]
Major Types of Trading Securities and Assets [Domain]
Financial Instruments [Domain]
Cash [Member]
Cash [Member]
Fixed Income Funds [Member]
Fixed Income Funds [Member]
Mutual Funds Fixed Income [Member]
Mutual Funds Fixed Income [Member]
Mutual Funds Fixed Income
Domestic [Member]
Domestic [Member]
Domestic Member.
Mutual Funds Equity [Member]
Mutual Fund [Member]
Cash and Cash Equivalents [Member]
Cash and Cash Equivalents [Member]
US Government Agencies Debt Securities [Member]
US Government Agencies Debt Securities [Member]
Corporate Debt [Member]
Corporate Debt Securities [Member]
State and Local Jurisdiction [Member]
State and Local Jurisdiction [Member]
Trust Assets [Axis]
Trust Assets [Axis]
Trust Assets [Axis]
Trust Assets [Domain]
Trust Assets [Domain]
[Domain] for Trust Assets [Axis]
Spent Nuclear Fuel and Decommissioning Trusts [Member]
Spent Nuclear Fuel and Decommissioning Trusts [Member]
Spent Nuclear Fuel and Decommissioning Trusts.
Unrealized Gain on Securities
Unrealized Gain on Securities
Book Values and Fair Values of Long - term Debt
Long-term Debt, Other Disclosures [Abstract]
Long Term Debt, Fair Value
Long-term Debt, Fair Value
Other Temporary Investments
Short-term Investments [Abstract]
Cost
Investment Owned, at Cost
Gross Unrealized Gains
Investment Owned, Unrecognized Unrealized Appreciation
Gross Unrealized Losses
Investment Owned, Unrecognized Unrealized Depreciation
Other Short-term Investments
Other Short-term Investments
Debt and Equity Securities Within Other Temporary Investments
Debt and Equity Securities Within Other Temporary Investments [Abstract]
Activity for our debt and equity securities within Other Temporary Investments.
Proceeds from Investment Sales
Proceeds from Sale of Short-term Investments
Purchases of Investments
Payments to Acquire Short-term Investments
Gross Realized Gains on Investment Sales
Gross Realized Gains on Investment Sales On Short Term Investment
Gross Realized Gains on Investment Sales On Short Term Investment.
Gross Realized Losses on Investment Sales
Gross Realized Losses On Investment Sales On Short Term Investment
Gross Realized Losses On Investment Sales On Short Term Investment.
Nuclear Trust Fund Investments
Nuclear Trust Fund Investments [Abstract]
Nuclear trust fund investments.
Fair Value
Gross Unrealized Gains
Available-for-sale Securities, Gross Unrealized Gain
Other-Than-Temporary Impairments
Other than Temporary Impairment Losses, Investments, Available-for-sale Securities
Securities Activity Within Decommissioning and SNF Trusts
Securities Activity Within Decommissioning and SNF Trusts [Abstract]
Securities Activity Within Decommissioning And Snf Trusts.
Proceeds from Investment Sales
Proceeds from Sale of Available-for-sale Securities
Purchases of Investments
Payments to Acquire Available-for-sale Securities
Gross Realized Gains on Investment Sales
Available-for-sale Securities, Gross Realized Gain (Loss)
Gross Realized Losses on Investment Sales
Available-for-sale Securities, Gross Realized Losses
Contractual Maturities, Fair Value of Debt Securities
Debt Securities, Held-to-maturity, Maturity, Fair Value [Abstract]
Within 1 year
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Rolling within One Year, Fair Value
After 1 year through 5 years
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Rolling after One Through Five Years, Fair Value
After 5 years through 10 years
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Rolling after Five Through Ten Years, Fair Value
After 10 years
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Rolling after 10 Years, Fair Value
Fair Value Measurements (Textuals)
Fair Value Measurements (Textuals) [Abstract]
Fair Value Measurements Textuals Abstract
Adjusted Cost of Debt Securities
Adjusted cost of debt securities
Adjusted cost of debt securities.
Adjusted Cost of Domestic Equity Securities
Adjusted Cost Of Equity Securities
Adjusted cost of equity securities within the nuclear trusts
Unrealized Loss on Securities
Unrealized Loss on Securities
Inventory [Axis]
Inventory [Axis]
Inventory [Domain]
Inventory [Domain]
Coal [Member]
Coal [Member]
Jointly Owned Utility Plant [Axis]
Jointly Owned Utility Plant [Axis]
Jointly Owned Utility Plant [Domain]
Jointly Owned Utility Plant [Domain]
Wm. H. Zimmer Generating Station [Member]
Wm. H. Zimmer Generating Station [Member]
Wm. H. Zimmer Generating Station Member
Gavin, Waterford, Darby and Lawrenceburg Plants [Member]
Gavin, Waterford, Darby and Lawrenceburg Plants [Member]
Gavin, Waterford, Darby and Lawrenceburg Plants [Member]
Corporate and Other [Member]
Corporate and Other [Member]
Impaired Long-Lived Assets Held and Used by Type [Axis]
Impaired Long-Lived Assets Held and Used by Type [Axis]
Impaired Long-Lived Assets Held and Used, Asset Name [Domain]
Impaired Long-Lived Assets Held and Used, Asset Name [Domain]
Other Assets [Member]
Other Assets [Member]
Racine Hydroelectric Plant [Member]
Racine Hydroelectric Plant [Member]
Racine Hydroelectric Plant [Member]
Merchant Coal-Fired Generation Assets [Member]
Merchant Coal-Fired Generation Assets [Member]
Merchant Coal-Fired Generation Assets [Member]
Zimmer Plant Assets [Member]
Zimmer Plant Assets [Member]
Zimmer Plant Assets [Member]
Plant Name [Axis]
Plant Name [Axis]
Plant Name.
Plant Name [Domain]
Plant Name [Domain]
Plant Name.
Jointly Owned Utility Plant, Proportionate Ownership Share
Jointly Owned Utility Plant, Proportionate Ownership Share
Competitive generation assets sold to a nonaffiliated party (in MWs).
Competitive generation assets sold to a nonaffiliated party (in MWs).
Competitive generation assets of AGR and AEGCo sold to a nonaffiliated party in January 2017.
Proceeds from Sales of Assets, Investing Activities
Proceeds from Sales of Assets, Investing Activities
Public Utilities, Property, Plant and Equipment, Net
Discontinued Operations and Disposal Groups (Textuals)
DiscontinuedOperationsAndDisposalGroup(Texuals) [Abstract]
DiscontinuedOperationsAndDisposalGroup(Texuals) [Abstract]
Cash Proceeds from Sale of Disposition Plants, Net
Cash Proceeds from Disposition of Business, Net
Cash Proceeds from Disposition of Business, Net
Pre-tax Gain on Sale of Plants
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal
Utilities Operating Expense, Operations
Property, Plant, and Equipment, Fair Value Disclosure
Property, Plant, and Equipment, Fair Value Disclosure
Other Asset Impairment Charges
Other Asset Impairment Charges
Statement of Comprehensive Income [Abstract]
OTHER COMPREHENSIVE INCOME
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]
Cash Flow Hedges, Net of Tax
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax
Securities Available for Sale, Net of Tax
Other Comprehensive Income (Loss), Securities, Available-for-sale, Adjustment, after Tax
Amortization of Pension and OPEB Deferred Costs, Net of Tax
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax
TOTAL OTHER COMPREHENSIVE INCOME (LOSS)
TOTAL COMPREHENSIVE INCOME (LOSS)
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest
Total Comprehensive Income Attributable to Noncontrolling Interest
Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest
TOTAL COMPREHENSIVE INCOME (LOSS) ATTRIBUTABLE TO COMMON SHAREHOLDERS
Comprehensive Income (Loss), Net of Tax, Attributable to Parent
Schedule of Segment Reporting Information, by Segment [Table]
Schedule of Segment Reporting Information, by Segment [Table]
Segment Reporting Information [Line Items]
Segment Reporting Information [Line Items]
Reportable Segment Information
Schedule of Segment Reporting Information, by Segment [Table Text Block]
Valuation Techniques
Fair Value Measurement, Policy [Policy Text Block]
Fair Values of Long-term Debt
Book Values And Fair Values Of Long Term Debt Policy [Text Block]
Policy for determining fair value of long-term debt.
Trust Assets for Decommissioning and Spent Nuclear Fuel Disposal
Trust Assets For Decommissioning And Spent Nuclear Fuel Disposal (Policy) [Text Block]
Element used to describe policy for trust assets for decommissioning and spent nuclear fuel disposal.
Fair Value Assets and Liabilities Measured on Recurring Basis
Fair Value Assets And Liabilities Measured On Recurring Basis (Policy) [Text Block]
Element describes policy for fair value assets and liabilities measured on recurring basis.
Cash Flow Hedges, Tax
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Tax
Securities Available for Sale, Tax
Other Comprehensive Income (Loss), Securities, Available-for-sale, Tax
Amortization of Pension and OPEB Deferred Costs, Tax
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, Tax
Statement of Stockholders' Equity [Abstract]
Statement, Equity Components [Axis]
Common Stock [Member]
Common Stock [Member]
Additional Paid-in Capital [Member]
Additional Paid-in Capital [Member]
Retained Earnings [Member]
Retained Earnings [Member]
Noncontrolling Interests [Member]
Noncontrolling Interest [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance
Beginning Balance
Beginning Balance, Shares
Issuance of Common Stock, Value
Stock Issued During Period, Value, New Issues
Issuance of Common Stock, Shares
Stock Issued During Period, Shares, New Issues
Common Stock Dividends
Dividends, Common Stock
Common Stock Dividends
Affiliated Dividends Common Stock
Equity impact of aggregate cash, stock, and paid-in-kind dividends declared to an entity that is affiliated with the reporting entity by means of direct or indirect ownership.
Common Stock Dividends
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders
Other Changes in Equity
Stockholders' Equity, Other
Capital Contribution from Member
Adjustments to Additional Paid in Capital, Other
ASU 2018-02 Adoption
Net Income (Loss)
Other Comprehensive Income (Loss)
Ending Balance
Ending Balance
Ending Balance, Shares
Benefit Plans
Pension and Other Postretirement Benefits Disclosure [Text Block]
Status of Tax Reform Regulatory Proceedings
Status of Tax Reform Regulatory Proceedings [Table Text Block]
Tabular disclosure of the current status of Tax Reform regulatory proceedings in AEP's various regulatory jurisdictions.
Estimated Provisions for Revenue Refund Related to Reduction in Corporate Federal Income Tax Rate
Estimated Provisions for Revenue Refund Related to Reduction in Corporate Federal Income Tax Rate [Table Text Block]
Tabular Disclosure for Estimated Provisions for Revenue Refund Related to Reduction in Corporate Federal Income Tax Rate.
Estimated Provisions for Revenue Refund Offsetting Amortization of Excess ADIT
Estimated Provisions for Revenue Refund Offsetting Amortization of Excess ADIT [Table Text Block]
Tabular Disclosure for Estimated Provisions for Revenue Refund Offsetting Amortization of Excess ADIT.
Schedule of Effective Income Tax Rate Reconciliation
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]
Basis of Accounting
Basis Of Accounting [Text Block]
Description of the basis of accounting used to prepare the financial statements (for example, U.S. Generally Accepted Accounting Principles, Other Comprehensive Basis of Accounting, IFRS).
Earnings Per Share
Earnings Per Share, Policy [Policy Text Block]
Book Values and Fair Values of Long-term Debt
Fair Value, by Balance Sheet Grouping [Table Text Block]
Other Temporary Investments
Other Temporary Investments [Text Block]
Other Temporary Investments
Debt and Equity Securities Within Other Temporary Investments
Debt and Equity Securities Within Other Temporary Investments [Text Block]
Debt and equity securities within Other Temporary Investments.
Nuclear Trust Fund Investments
Nuclear Trust Fund Investments [Text Block]
Nuclear trust fund investments.
Securities Activity Within the Decommissioning and SNF Trusts
Securities Activity Within Decommissioning and SNF Trusts [Text Block]
Securities Activity Within the decommissioning and SNF trusts.
Contractual Maturities, Fair Value of Debt Securities in Nuclear Trusts
Investments Classified by Contractual Maturity Date [Table Text Block]
Fair Value, Assets and Liabilities Measured on Recurring Basis
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]
Changes in Fair Value of Net Trading Derivatives and Other Investments
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]
Significant Unobservable Inputs for Level 3
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis, Valuation Techniques [Table Text Block]
Sensitivity of Fair Value Measurements
Fair Value Measurement Inputs and Valuation Techniques [Table Text Block]
Regulated Generating Unit Expected to be Retired by 2020
Disposal Groups, Including Discontinued Operations [Table Text Block]
Regulatory Assets Pending Final Regulatory Approval
Schedule of Regulatory Assets [Table Text Block]
Financing Activities
Debt Disclosure [Text Block]
Financial Instrument [Axis]
Financial Instruments [Domain]
Risk Management Commodity Contracts [Member]
Energy Contracts [Member]
Energy Contracts [Member]
Risk management commodity contracts whose primary underlying risk is tied energy contracts.
Natural Gas Contracts [Member]
FTRs [Member]
Financial Trasnsmission Rights [Member]
Risk management commodity contracts whose primary underlying risk is tied financial transmission rights.
Commodity Hedges [Member]
Commodity [Member]
Fair Value Hedges [Member]
Fair Value Hedging [Member]
Maturity Of Fair Value Risk Management Contracts [Axis]
Maturity Of Fair Value Risk Management Contracts [Axis]
Maturity Year [Domain]
Maturity Year [Domain]
2018 [Member]
Within Current Year [Member]
Maturity of risk management contracts within current year.
2019 - 2021 [Member]
Maturity Period 2 [Member]
2022 - 2023 [Member]
Maturity Period 3 [Member]
2024 - 2032 [Member]
Maturity Period Four [Member]
Fair Value Hierarchy and NAV [Axis]
Fair Value Hierarchy and NAV [Axis]
Fair Value Hierarchy and NAV [Domain]
Fair Value Hierarchy and NAV [Domain]
Level 1 [Member]
Fair Value, Inputs, Level 1 [Member]
Level 2 [Member]
Fair Value, Inputs, Level 2 [Member]
Level 3 [Member]
Fair Value, Inputs, Level 3 [Member]
Measurement Basis [Axis]
Measurement Basis [Axis]
Fair Value Measurement [Domain]
Fair Value Measurement [Domain]
Portion at Fair Value Measurement [Member]
Portion at Fair Value Measurement [Member]
Other [Member]
Portion at Other than Fair Value Measurement [Member]
Measurement Input Type [Axis]
Measurement Input Type [Axis]
Measurement Input Type [Domain]
Measurement Input Type [Domain]
Measurement Input, Counterparty Credit Risk [Member]
Measurement Input, Counterparty Credit Risk [Member]
Low [Member]
High [Member]
Weighted Average [Member]
Weighted Average [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Abstract]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Abstract]
Assets, Fair Value Disclosure
Assets, Fair Value Disclosure [Abstract]
Cash and Cash Equivalents
Cash and Cash Equivalents, Fair Value Disclosure
Risk Management Assets
Derivative Asset [Abstract]
Risk Management Assets
Spent Nuclear Fuel and Decommissioning Trusts
Nuclear Fuel and Decommissioning Trusts [Abstract]
Nuclear Fuel and Decommissioning Trusts Abstract.
Total Assets
Assets, Fair Value Disclosure
Liabilities, Fair Value Disclosure
Liabilities, Fair Value Disclosure [Abstract]
Risk Management Liabilities
Changes in the Fair Value of Net Trading Derivatives and other investments
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Beginning Balance
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis with Unobservable Inputs
Realized Gain (Loss) Included in Net Income (or Changes in Net Assets)
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Earnings
Unrealized Gain (Loss) Included in Net Income (or Changes in Net Assets) Relating to Assets Still Held at the Reporting Date
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Change in Unrealized Gain (Loss)
Realized and Unrealized Gains (Losses) Included in Other Comprehensive Income
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Gain (Loss) Included in Other Comprehensive Income (Loss)
Settlements
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Purchases, Sales, Issues, Settlements
Transfers into Level 3
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Transfers into Level 3
Transfers out of Level 3
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Transfers out of Level 3
Changes in Fair Value Allocated to Regulated Jurisdiction
Changes in Fair Value Allocated to Regulated Jurisdiction
This element represents total gains or losses for the period (realized and unrealized), arising from assets and liabilities measured at fair value on a recurring basis using unobservable inputs (Level 3), which are allocated to regulated jurisdictions.
Ending Balance
Level 3 Quantitative Information
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Fair Value Significant Unobservable Input Price Per Unit
Fair Value Significant Unobservable Input Price Per Unit
Price per unit of significant unobservable inputs, such as but not limited to fair value for financial transmission rights agreements and energy contracts.
Fair Value, Option, Relation to Measurement Inputs
Fair Value, Option, Relation to Measurement Inputs
Fair Value Measurements 1 (Textuals)
Fair Value Measurements 1 (Textuals) [Abstract]
Fair value measurements textuals abstract for assets and liabilities measured on a recurring basis.
Maturity of Net Fair Value of Risk Management Contracts Prior to Cash Collateral, Assets/Liabilities
Maturity Of Net Fair Value Of Risk Management Contracts Prior To Cash Collateral Assets Or Liabilities
Maturity of the net fair value of risk management contracts prior to cash collateral, assets or liabilities.