10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C.  20549

FORM 10-Q

☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For The Quarterly Period Ended September 30, 2023

or

☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For The Transition Period from ____ to ____

Commission	Registrants;						I.R.S. Employer
File Number	Address and Telephone Number					States of Incorporation	Identification Nos.
1-3525	AMERICAN ELECTRIC POWER CO INC.					New York	13-4922640
333-221643	AEP TEXAS INC.					Delaware	51-0007707
333-217143	AEP TRANSMISSION COMPANY, LLC					Delaware	46-1125168
1-3457	APPALACHIAN POWER COMPANY					Virginia	54-0124790
1-3570	INDIANA MICHIGAN POWER COMPANY					Indiana	35-0410455
1-6543	OHIO POWER COMPANY					Ohio	31-4271000
0-343	PUBLIC SERVICE COMPANY OF OKLAHOMA					Oklahoma	73-0410895
1-3146	SOUTHWESTERN ELECTRIC POWER COMPANY					Delaware	72-0323455
	1 Riverside Plaza,		Columbus,	Ohio	43215-2373
	Telephone	(614)	716-1000

Securities registered pursuant to Section 12(b) of the Act:

Registrant	Title of each class	Trading Symbol	Name of Each Exchange on Which Registered
American Electric Power Company Inc.	Common Stock, $6.50 par value	AEP	The NASDAQ Stock Market LLC

Indicate by check mark whether the registrants (1) have filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrants were required to file such reports), and (2) have been subject to such filing requirements for the past 90 days.
	Yes	x	No	☐

Indicate by check mark whether the registrants have submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrants were required to submit such files).
	Yes	x	No	☐

Indicate by check mark whether American Electric Power Company, Inc. is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company.  See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act.
Large Accelerated filer	x	Accelerated filer	☐	Non-accelerated filer	☐
Smaller reporting company	☐	Emerging growth company	☐

Indicate by check mark whether AEP Texas Inc., AEP Transmission Company, LLC, Appalachian Power Company, Indiana Michigan Power Company, Ohio Power Company, Public Service Company of Oklahoma and Southwestern Electric Power Company are large accelerated filers, accelerated filers, non-accelerated filers, smaller reporting companies, or emerging growth companies.  See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act.
Large Accelerated filer	☐	Accelerated filer	☐	Non-accelerated filer	x
Smaller reporting company	☐	Emerging growth company	☐

If an emerging growth company, indicate by check mark if the registrants have elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.
	☐

Indicate by check mark whether the registrants are shell companies (as defined in Rule 12b-2 of the Exchange Act). Yes ☐ No x

AEP Texas Inc., AEP Transmission Company, LLC, Appalachian Power Company, Indiana Michigan Power Company, Ohio Power Company, Public Service Company of Oklahoma and Southwestern Electric Power Company meet the conditions set forth in General Instruction H(1)(a) and (b) of Form 10-Q and are therefore filing this Form 10-Q with the reduced disclosure format specified in General Instruction H(2) to Form 10-Q.

	Number of shares of common stock outstanding of the Registrants as of
	November 2, 2023
American Electric Power Company, Inc.	525,875,633
	($6.50 par value)
AEP Texas Inc.	100
	($0.01 par value)
AEP Transmission Company, LLC (a)	NA
Appalachian Power Company	13,499,500
	(no par value)
Indiana Michigan Power Company	1,400,000
	(no par value)
Ohio Power Company	27,952,473
	(no par value)
Public Service Company of Oklahoma	9,013,000
	($15 par value)
Southwestern Electric Power Company	3,680
	($18 par value)

(a)100% interest is held by AEP Transmission Holding Company, LLC, a wholly-owned subsidiary of American Electric Power Company, Inc.

NA    Not applicable.

AMERICAN ELECTRIC POWER COMPANY, INC. AND SUBSIDIARY COMPANIES
INDEX OF QUARTERLY REPORTS ON FORM 10-Q
September 30, 2023
		Page
		Number
Glossary of Terms		i
Forward-Looking Information		v
Part I. FINANCIAL INFORMATION
	Items 1, 2, 3 and 4 - Financial Statements, Management’s Discussion and Analysis of Financial Condition and Results of Operations, Quantitative and Qualitative Disclosures About Market Risk and Controls and Procedures:
American Electric Power Company, Inc. and Subsidiary Companies:
	Management’s Discussion and Analysis of Financial Condition and Results of Operations	1
	Condensed Consolidated Financial Statements	47
AEP Texas Inc. and Subsidiaries:
	Management’s Narrative Discussion and Analysis of Results of Operations	53
	Condensed Consolidated Financial Statements	56
AEP Transmission Company, LLC and Subsidiaries:
	Management’s Narrative Discussion and Analysis of Results of Operations	62
	Condensed Consolidated Financial Statements	64
Appalachian Power Company and Subsidiaries:
	Management’s Narrative Discussion and Analysis of Results of Operations	69
	Condensed Consolidated Financial Statements	73
Indiana Michigan Power Company and Subsidiaries:
	Management’s Narrative Discussion and Analysis of Results of Operations	79
	Condensed Consolidated Financial Statements	82
Ohio Power Company and Subsidiaries:
	Management’s Narrative Discussion and Analysis of Results of Operations	88
	Condensed Consolidated Financial Statements	91
Public Service Company of Oklahoma:
	Management’s Narrative Discussion and Analysis of Results of Operations	96
	Condensed Financial Statements	99
Southwestern Electric Power Company Consolidated:
	Management’s Narrative Discussion and Analysis of Results of Operations	105
	Condensed Consolidated Financial Statements	108
Index of Condensed Notes to Condensed Financial Statements of Registrants		114
Controls and Procedures		203

Part II.  OTHER INFORMATION
	Item 1.	Legal Proceedings	204
	Item 1A.	Risk Factors	204
	Item 2.	Unregistered Sales of Equity Securities and Use of Proceeds	204
	Item 3.	Defaults Upon Senior Securities	204
	Item 4.	Mine Safety Disclosures	204
	Item 5.	Other Information	204
	Item 6.	Exhibits	205
SIGNATURE			206
This combined Form 10-Q is separately filed by American Electric Power Company, Inc., AEP Texas Inc., AEP Transmission Company, LLC, Appalachian Power Company, Indiana Michigan Power Company, Ohio Power Company, Public Service Company of Oklahoma and Southwestern Electric Power Company.  Information contained herein relating to any individual registrant is filed by such registrant on its own behalf. Except for American Electric Power Company, Inc., each registrant makes no representation as to information relating to the other registrants.

GLOSSARY OF TERMS

When the following terms and abbreviations appear in the text of this report, they have the meanings indicated below. 

Term	Meaning
AEGCo	AEP Generating Company, an AEP electric utility subsidiary.
AEP	American Electric Power Company, Inc., an investor-owned electric public utility holding company which includes American Electric Power Company, Inc. (Parent) and majority owned consolidated subsidiaries and consolidated affiliates.
AEP Credit	AEP Credit, Inc., a consolidated VIE of AEP which securitizes accounts receivable and accrued utility revenues for affiliated electric utility companies.
AEP Energy Supply LLC	A nonregulated holding company for AEP’s competitive generation, wholesale and retail businesses, and a wholly-owned subsidiary of AEP.
AEP Renewables	A division of AEP Energy Supply LLC that develops and/or acquires large scale renewable projects that are backed with long-term contracts with creditworthy counterparties.
AEP System	American Electric Power System, an electric system, owned and operated by AEP subsidiaries.
AEP Texas	AEP Texas Inc., an AEP electric utility subsidiary.
AEP Transmission Holdco	AEP Transmission Holding Company, LLC, a wholly-owned subsidiary of AEP.
AEPEP	AEP Energy Partners, Inc., a subsidiary of AEP dedicated to wholesale marketing and trading, hedging activities, asset management and commercial and industrial sales in deregulated markets.
AEPSC	American Electric Power Service Corporation, an AEP service subsidiary providing management and professional services to AEP and its subsidiaries.
AEPTCo	AEP Transmission Company, LLC, a wholly-owned subsidiary of AEP Transmission Holdco, is an intermediate holding company that owns the State Transcos.
AEPTCo Parent	AEP Transmission Company, LLC, the holding company of the State Transcos within the AEPTCo consolidation.
AFUDC	Allowance for Equity Funds Used During Construction.
ALJ	Administrative Law Judge.
AOCI	Accumulated Other Comprehensive Income.
APCo	Appalachian Power Company, an AEP electric utility subsidiary.
Appalachian Consumer Rate Relief Funding	Appalachian Consumer Rate Relief Funding LLC, a wholly-owned subsidiary of APCo and a consolidated VIE formed for the purpose of issuing and servicing securitization bonds related to the under-recovered Expanded Net Energy Cost deferral balance.
Apple Blossom	Apple Blossom Wind Holdings LLC, a consolidated VIE of AEP, and tax equity partnership.
APSC	Arkansas Public Service Commission.
ARO	Asset Retirement Obligations.
ATM	At-the-Market.
Black Oak	Black Oak Getty Wind Holdings LLC, a consolidated VIE of AEP, and tax equity partnership.
CAA	Clean Air Act.
CCR	Coal Combustion Residual.
CO2	Carbon dioxide and other greenhouse gases.
CO2e	Carbon dioxide equivalent.

i

Term	Meaning
Cook Plant	Donald C. Cook Nuclear Plant, a two-unit, 2,296 MW nuclear plant owned by I&M.
COVID-19	Coronavirus 2019, a highly infectious respiratory disease. In March 2020, the World Health Organization declared COVID-19 a worldwide pandemic.
CSAPR	Cross-State Air Pollution Rule.
CWIP	Construction Work in Progress.
DCC Fuel	DCC Fuel XIII, DCC Fuel XIV, DCC Fuel XV, DCC Fuel XVI, DCC Fuel XVII and DCC Fuel XVIII, consolidated VIEs formed for the purpose of acquiring, owning and leasing nuclear fuel to I&M.
DHLC	Dolet Hills Lignite Company, LLC, a wholly-owned lignite mining subsidiary of SWEPCo. DHLC is a non-consolidated VIE of SWEPCo.
DIR	Distribution Investment Rider.
Dry Lake	Dry Lake Solar Project, a consolidated VIE whose sole purpose is to own and operate a 100 MW solar generation facility in southern Nevada in which AEP owns a 75% interest.
EIS	Energy Insurance Services, Inc., a nonaffiliated captive insurance company and consolidated VIE of AEP.
ELG	Effluent Limitation Guidelines.
ENEC	Expanded Net Energy Cost.
Energy Supply	AEP Energy Supply LLC, a nonregulated holding company for AEP’s competitive generation, wholesale and retail businesses, and a wholly-owned subsidiary of AEP.
Equity Units	AEP’s Equity Units issued in August 2020.
ERCOT	Electric Reliability Council of Texas regional transmission organization.
ESP	Electric Security Plans, a PUCO requirement for electric utilities to adjust their rates by filing with the PUCO.
ETT	Electric Transmission Texas, LLC, an equity interest joint venture between AEP Transmission Holdco and Berkshire Hathaway Energy Company formed to own and operate electric transmission facilities in ERCOT.
Excess ADIT	Excess accumulated deferred income taxes.
FAC	Fuel Adjustment Clause.
FASB	Financial Accounting Standards Board.
Federal EPA	United States Environmental Protection Agency.
FERC	Federal Energy Regulatory Commission.
FGD	Flue Gas Desulfurization or scrubbers.
FIP	Federal Implementation Plan.
FTR	Financial Transmission Right, a financial instrument that entitles the holder to receive compensation for certain congestion-related transmission charges that arise when the power grid is congested resulting in differences in locational prices.
GAAP	Accounting Principles Generally Accepted in the United States of America.
I&M	Indiana Michigan Power Company, an AEP electric utility subsidiary.
IRA	On August 16, 2022 President Biden signed into law legislation commonly referred to as the “Inflation Reduction Act” (IRA).
IRS	Internal Revenue Service.
ITC	Investment Tax Credit.
IURC	Indiana Utility Regulatory Commission.
KGPCo	Kingsport Power Company, an AEP electric utility subsidiary.
KPCo	Kentucky Power Company, an AEP electric utility subsidiary.

ii

Term	Meaning
KPSC	Kentucky Public Service Commission.
KTCo	AEP Kentucky Transmission Company, Inc., an affiliate of KPCo and a wholly-owned subsidiary of AEP.
KWh	Kilowatt-hour.
LPSC	Louisiana Public Service Commission.
MATS	Mercury and Air Toxic Standards.
Maverick	Maverick, part of the North Central Wind Energy Facilities, consists of 287 MWs of wind generation in Oklahoma.
MISO	Midcontinent Independent System Operator.
Mitchell Plant	A two unit, 1,560 MW coal-fired power plant located in Moundsville, West Virginia. The plant is jointly owned by KPCo and WPCo.
MMBtu	Million British Thermal Units.
MPSC	Michigan Public Service Commission.
MTM	Mark-to-Market.
MW	Megawatt.
MWh	Megawatt-hour.
NAAQS	National Ambient Air Quality Standards.
Nonutility Money Pool	Centralized funding mechanism AEP uses to meet the short-term cash requirements of certain nonutility subsidiaries.
NCWF	North Central Wind Energy Facilities, a joint PSO and SWEPCo project, which includes three Oklahoma wind facilities totaling approximately 1,484 MWs of wind generation.
NOLC	Net Operating Loss Carryforward.
NOx	Nitrogen oxide.
OCC	Corporation Commission of the State of Oklahoma.
OHTCo	AEP Ohio Transmission Company, Inc., a wholly-owned AEPTCo transmission subsidiary.
OPCo	Ohio Power Company, an AEP electric utility subsidiary.
OPEB	Other Postretirement Benefits.
OTC	Over-the-counter.
OVEC	Ohio Valley Electric Corporation, which is 43.47% owned by AEP.
Parent	American Electric Power Company, Inc., the equity owner of AEP subsidiaries within the AEP consolidation.
PJM	Pennsylvania – New Jersey – Maryland regional transmission organization.
PM	Particulate Matter.
PPA	Purchase Power and Sale Agreement.
PSA	Purchase and Sale Agreement.
PSO	Public Service Company of Oklahoma, an AEP electric utility subsidiary.
PTC	Production Tax Credit.
PUCO	Public Utilities Commission of Ohio.
PUCT	Public Utility Commission of Texas.
Registrant Subsidiaries	AEP subsidiaries which are SEC registrants: AEP Texas, AEPTCo, APCo, I&M, OPCo, PSO and SWEPCo.
Registrants	SEC registrants: AEP, AEP Texas, AEPTCo, APCo, I&M, OPCo, PSO and SWEPCo.

iii

Term	Meaning
Restoration Funding	AEP Texas Restoration Funding LLC, a wholly-owned subsidiary of AEP Texas and a consolidated VIE formed for the purpose of issuing and servicing securitization bonds related to storm restoration in Texas primarily caused by Hurricane Harvey.
Risk Management Contracts	Trading and non-trading derivatives, including those derivatives designated as cash flow and fair value hedges.
Rockport Plant	A generation plant, jointly owned by AEGCo and I&M, consisting of two 1,310 MW coal-fired generating units near Rockport, Indiana.
ROE	Return on Equity.
RPM	Reliability Pricing Model.
RTO	Regional Transmission Organization, responsible for moving electricity over large interstate areas.
Sabine	Sabine Mining Company, a lignite mining company that is a consolidated VIE for AEP and SWEPCo.
Santa Rita East	Santa Rita East Wind Holdings, LLC, a consolidated VIE whose sole purpose is to own and operate a 302 MW wind generation facility in west Texas in which AEP owns an 85% interest.
SEC	U.S. Securities and Exchange Commission.
SIP	State Implementation Plan.
SNF	Spent Nuclear Fuel.
SO2	Sulfur dioxide.
SPP	Southwest Power Pool regional transmission organization.
State Transcos	AEPTCo’s seven wholly-owned, FERC regulated, transmission only electric utilities, which are geographically aligned with AEP’s existing utility operating companies.
Sundance	Sundance, acquired in April 2021 as part of the North Central Wind Energy Facilities, consists of 199 MWs of wind generation in Oklahoma.
SWEPCo	Southwestern Electric Power Company, an AEP electric utility subsidiary.
Tax Reform	On December 22, 2017, President Trump signed into law legislation referred to as the “Tax Cuts and Jobs Act” (the TCJA). The TCJA includes significant changes to the Internal Revenue Code of 1986, including a reduction in the corporate federal income tax rate from 35% to 21% effective January 1, 2018.
Transition Funding	AEP Texas Central Transition Funding III LLC, a wholly-owned subsidiary of AEP Texas and consolidated VIE formed for the purpose of issuing and servicing securitization bonds related to Texas Restructuring Legislation.
Transource Energy	Transource Energy, LLC, a consolidated VIE formed for the purpose of investing in utilities which develop, acquire, construct, own and operate transmission facilities in accordance with FERC-approved rates.
Traverse	Traverse, part of the North Central Wind Energy Facilities, consists of 998 MWs of wind generation in Oklahoma.
Turk Plant	John W. Turk, Jr. Plant, a 650 MW coal-fired plant in Arkansas that is 73% owned by SWEPCo.
UPA	Unit Power Agreement.
Utility Money Pool	Centralized funding mechanism AEP uses to meet the short-term cash requirements of certain utility subsidiaries.
VIE	Variable Interest Entity.
Virginia SCC	Virginia State Corporation Commission.
WPCo	Wheeling Power Company, an AEP electric utility subsidiary.
WVPSC	Public Service Commission of West Virginia.

iv

FORWARD-LOOKING INFORMATION

This report made by the Registrants contains forward-looking statements within the meaning of Section 21E of the Securities Exchange Act of 1934.  Many forward-looking statements appear in “Part I – Item 2 Management’s Discussion and Analysis of Financial Condition and Results of Operations” of this quarterly report, but there are others throughout this document which may be identified by words such as “expect,” “anticipate,” “intend,” “plan,” “believe,” “will,” “should,” “could,” “would,” “project,” “continue” and similar expressions, and include statements reflecting future results or guidance and statements of outlook.  These matters are subject to risks and uncertainties that could cause actual results to differ materially from those projected.  Forward-looking statements in this document are presented as of the date of this document.  Except to the extent required by applicable law, management undertakes no obligation to update or revise any forward-looking statement.  Among the factors that could cause actual results to differ materially from those in the forward-looking statements are:

• Changes in economic conditions, electric market demand and demographic patterns in AEP service territories.

• The impact of pandemics and any associated disruption of AEP’s business operations due to impacts on economic or market conditions, costs of compliance with potential government regulations, electricity usage, supply chain issues, customers, service providers, vendors and suppliers.

• The economic impact of increased global trade tensions including the conflicts in Ukraine and the Middle East, and the adoption or expansion of economic sanctions or trade restrictions.

• Inflationary or deflationary interest rate trends.

• Volatility and disruptions in financial markets precipitated by any cause, including failure to make progress on federal budget or debt ceiling matters or instability in the banking industry; particularly developments affecting the availability or cost of capital to finance new capital projects and refinance existing debt.

• The availability and cost of funds to finance working capital and capital needs, particularly (i) if expected sources of capital, such as proceeds from the sale of assets, subsidiaries or tax credits, do not materialize or do not materialize at the level anticipated, and (ii) during periods when the time lag between incurring costs and recovery is long and the costs are material.

• Decreased demand for electricity.

• Weather conditions, including storms and drought conditions, and the ability to recover significant storm restoration costs.

• Limitations or restrictions on the amounts and types of insurance available to cover losses that might arise in connection with natural disasters or operations.

• The cost of fuel and its transportation, the creditworthiness and performance of fuel suppliers and transporters and the cost of storing and disposing of used fuel, including coal ash and SNF.

• The availability of fuel and necessary generation capacity and the performance of generation plants.

• The ability to recover fuel and other energy costs through regulated or competitive electric rates.

• The ability to transition from fossil generation and the ability to build or acquire renewable generation, transmission lines and facilities (including the ability to obtain any necessary regulatory approvals and permits) when needed at acceptable prices and terms, including favorable tax treatment, cost caps imposed by regulators and other operational commitments to regulatory commissions and customers for renewable generation projects, and to recover all related costs.

• New legislation, litigation or government regulation, including changes to tax laws and regulations, oversight of nuclear generation, energy commodity trading and new or heightened requirements for reduced emissions of sulfur, nitrogen, mercury, carbon, soot or PM and other substances that could impact the continued operation, cost recovery and/or profitability of generation plants and related assets.

• The impact of federal tax legislation on results of operations, financial condition, cash flows or credit ratings.

• The risks before, during and after generation of electricity associated with the fuels used or the byproducts and wastes of such fuels, including coal ash and SNF.

• Timing and resolution of pending and future rate cases, negotiations and other regulatory decisions, including rate or other recovery of new investments in generation, distribution and transmission service and environmental compliance.

• Resolution of litigation or regulatory proceedings or investigations.

• The ability to constrain operation and maintenance costs.

v

• Prices and demand for power generated and sold at wholesale.

• Changes in technology, particularly with respect to energy storage and new, developing, alternative or distributed sources of generation.

• The ability to recover through rates any remaining unrecovered investment in generation units that may be retired before the end of their previously projected useful lives.

• Volatility and changes in markets for coal and other energy-related commodities, particularly changes in the price of natural gas.

• The impact of changing expectations and demands of customers, regulators, investors and stakeholders, including heightened emphasis on environmental, social and governance concerns.

• Changes in utility regulation and the allocation of costs within RTOs including ERCOT, PJM and SPP.

• Changes in the creditworthiness of the counterparties with contractual arrangements, including participants in the energy trading market.

• Actions of rating agencies, including changes in the ratings of debt.

• The impact of volatility in the capital markets on the value of the investments held by the pension, OPEB, captive insurance entity and nuclear decommissioning trust and the impact of such volatility on future funding requirements.

• Accounting standards periodically issued by accounting standard-setting bodies.

• Other risks and unforeseen events, including wars and military conflicts, the effects of terrorism (including increased security costs), embargoes, wildfires, cyber-security threats and other catastrophic events.

• The ability to attract and retain the requisite work force and key personnel.

The forward-looking statements of the Registrants speak only as of the date of this report or as of the date they are made.  The Registrants expressly disclaim any obligation to update any forward-looking information, except as required by law.  For a more detailed discussion of these factors, see “Risk Factors” in Part I of the 2022 Annual Report and in Part II of this report.

The Registrants may use AEP’s website as a distribution channel for material company information. Financial and other important information regarding the Registrants is routinely posted on and accessible through AEP’s website at www.aep.com/investors/. In addition, you may automatically receive email alerts and other information about the Registrants when you enroll your email address by visiting the “Email Alerts” section at www.aep.com/investors/.

Company Website and Availability of SEC Filings

Our principal corporate website address is www.aep.com. Information on our website is not incorporated by reference herein and is not part of this Form 10-Q. We make available free of charge through our website our Annual Report on Form 10-K, quarterly reports on Form 10-Q, current reports on Form 8-K and amendments to those reports filed or furnished pursuant to Section 13(a) or 15(d) of the Exchange Act as soon as reasonably practicable after such documents are electronically filed with, or furnished to, the SEC. The SEC maintains a website at www.sec.gov that contains reports, proxy and information statements and other information regarding AEP.

vi

AMERICAN ELECTRIC POWER COMPANY, INC. AND SUBSIDIARY COMPANIES

MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND

RESULTS OF OPERATIONS

EXECUTIVE OVERVIEW

AEP Consolidated Earnings Attributable to Common Shareholders

Third Quarter of 2023 Compared to Third Quarter of 2022

Earnings Attributable to AEP Common Shareholders increased from $684 million in 2022 to $954 million in 2023 primarily due to:

•Favorable rate proceedings in AEP’s various jurisdictions.

•Investment in transmission assets, which resulted in higher revenues and income.

•A loss related to the expected sale of the Kentucky Operations in 2022. The expected sale was terminated in April 2023.

These increases were partially offset by:

•A decrease in weather-related sales volumes.

•An increase in interest expense due to higher interest rates and debt balances.

•A gain on the sale of mineral rights in 2022.

Nine Months Ended September 30, 2023 Compared to Nine Months Ended September 30, 2022

Earnings Attributable to AEP Common Shareholders decreased from $1,923 million in 2022 to $1,872 million in 2023 primarily due to:

•A decrease in weather-related sales volumes.

•An increase in interest expense due to higher interest rates and debt balances.

•Unfavorable mark-to-market economic hedge activity driven by a decrease in commodity prices.

•A loss on the sale of the competitive contracted renewables portfolio in 2023.

•A gain on the sale of mineral rights in 2022.

These decreases were partially offset by:

•Favorable rate proceedings in AEP’s various jurisdictions.

•Investment in transmission assets, which resulted in higher revenues and income.

•A loss related to the expected sale of the Kentucky Operations in 2022. The expected sale was terminated in April 2023.

•An impairment of AEP’s equity investment in Flat Ridge 2 in 2022.

See “Results of Operations” section for additional information by operating segment.

1

Customer Demand

AEP’s weather-normalized retail sales volumes for the third quarter of 2023 increased by 2.1% from the third quarter of 2022. Weather-normalized residential sales increased by 0.6% in the third quarter of 2023 from the third quarter of 2022. This increase was primarily due to an increase in the number of residential customers served. Weather-normalized commercial sales increased by 7.5% in the third quarter of 2023 compared to the third quarter of 2022. The increase in commercial sales was primarily due to new data center loads and economic development. AEP’s third quarter 2023 industrial sales volumes decreased by 1.1% from the third quarter of 2022. The decrease in industrial sales was primarily due to declines in the non-Oil and Gas sectors.

AEP’s weather-normalized retail sales volumes for the nine months ended September 30, 2023 increased by 2.3% compared to the nine months ended September 30, 2022. Weather-normalized residential sales decreased by 0.9% for the nine months ended September 30, 2023 compared to the nine months ended September 30, 2022. This decrease was primarily due to a reduction in usage per customer. Weather-normalized commercial sales increased by 7.7% for the nine months ended September 30, 2023 compared to the nine months ended September 30, 2022. The increase in commercial sales was primarily due to new data center loads and economic development. AEP’s industrial sales volumes for the nine months ended September 30, 2023 increased by 1.3% compared to the nine months ended September 30, 2022. The increase in industrial sales was spread across many sectors.

Supply Chain Disruption and Inflation

The Registrants have experienced certain supply chain disruptions driven by several factors including the COVID-19 pandemic, international tensions including the ramifications of regional conflict, increased demand due to the economic recovery from the pandemic, inflation, labor shortages in certain trades and shortages in the availability of certain raw materials. These supply chain disruptions have not had a material impact on the Registrants net income, cash flows and financial condition, but have extended lead times for certain goods and services and have contributed to higher prices for fuel, materials, labor, equipment and other needed commodities. Management has implemented risk mitigation strategies in an attempt to mitigate the impacts of these supply chain disruptions.

AEP and its utilities finance its operations with commercial paper and other variable rate instruments. AEP generally uses short-term borrowings to fund working capital needs until long-term funding is arranged. Sources of long-term funding includes the issuance of long-term debt. These financing options to maintain adequate liquidity are subject to fluctuations in interest rates. The United States economy has experienced a significant level of inflation that has contributed to increased uncertainty in the outlook of near-term economic activity, including whether inflation will continue and at what rate. To the extent interest rates continue to increase, it could reduce future net income and cash flows and impact financial condition.

A prolonged continuation or a further increase in the severity of supply chain and inflationary disruptions could result in additional increases in the cost of certain goods, services and cost of capital and further extend lead times which could reduce future net income and cash flows and impact financial condition.

Disposition of the Competitive Contracted Renewables Portfolio

In February 2022, AEP management announced the initiation of a process to sell all or a portion of AEP Renewables’ competitive contracted renewables portfolio (the portfolio) within the Generation & Marketing segment. In late January 2023, AEP received final bids from interested parties. In February 2023, AEP’s Board of Directors approved management’s plan to sell the portfolio and AEP signed an agreement with a nonaffiliated party. AEP recorded a pretax loss of $112 million ($88 million after-tax) in the first quarter of 2023 after reaching Held for Sale status and determining the carrying value of the portfolio exceeded the estimated fair value.

In August 2023, AEP completed the sale of the entire portfolio to the nonaffiliated party and received cash proceeds of approximately $1.2 billion, net of taxes and transaction costs. See the "Disposition of the Competitive Contracted Renewables Portfolio" section of Note 6 for additional information.

2

Planned Sale of AEP Energy and AEP Onsite Partners

AEP management has continued a strategic evaluation of AEP’s portfolio of businesses with a focus on core regulated utility operations, risk mitigation and simplification. As a result of these efforts, the following decisions have recently been made with respect to AEP Energy and AEP Onsite Partners.

AEP Energy

In October 2022, AEP initiated a strategic evaluation for its ownership in AEP Energy, a wholly-owned retail energy supplier that supplies electricity and/or natural gas on a price risk managed basis to residential, commercial and industrial customers. AEP Energy provides various energy solutions in Illinois, Pennsylvania, Delaware, Maryland, New Jersey, Ohio and Washington, D.C. AEP Energy had approximately 900,000 customer accounts as of September 30, 2023. In April 2023, AEP management completed the strategic evaluation of AEP Energy and initiated a sale process. The timing of the completion of the sales process is dependent upon a number of factors. AEP is currently targeting the sales process to be completed in the first half of 2024. Depending on the outcome of the sales process, it could reduce future net income and impact financial condition.

AEP Onsite Partners

In April 2023, AEP also made a decision to include AEP Onsite Partners in a sale process. AEP OnSite Partners targets opportunities in distributed solar, combined heat and power, energy storage, waste heat recovery, energy efficiency, peaking generation and other energy solutions. As of September 30, 2023, AEP OnSite Partners owned projects located in 22 states, including approximately 193 MWs of installed solar capacity and approximately 2 MWs of solar projects under construction. As of September 30, 2023, the net book value of these assets was $353 million. The timing of the completion of the sales process is dependent upon a number of factors. AEP is currently targeting the sales process to be completed in the first half of 2024.

AEP Onsite Partners also owns a 50% interest in NM Renewable Development, LLC, (NMRD) totaling $119 million accounted for as an equity method investment. The NMRD portfolio consists of 9 operating solar projects totaling 185 MWs and 6 projects totaling 440 MWs in development. Separate from the remainder of AEP Onsite Partners, AEP and the joint owner have agreed to initiate a joint sales process for their respective interests in NMRD. The timing of the completion of the sales process is dependent upon a number of factors. AEP is currently targeting the sales process to be completed in the fourth quarter of 2023 or early 2024.

If AEP is unable to recover the net book value or carrying value of these assets as part of the sale process, it could reduce future net income and impact financial condition.

Planned Sale and Strategic Evaluation of Certain Transmission Joint Ventures

In April 2023, AEP also initiated a strategic evaluation for its ownership in certain transmission joint ventures in the AEP Transmission HoldCo segment including Pioneer Transmission, LLC, Prairie Wind Transmission, LLC and Transource Energy. In July 2023, AEP made a decision to initiate a sales process for its investment in Pioneer Transmission, LLC and Prairie Wind Transmission, LLC. As of September 30, 2023, AEP’s investment in Pioneer Transmission, LLC, and Prairie Wind Transmission, LLC was $48 million and $19 million, respectively.

As of September 30, 2023, the net book value of Transource Energy was $286 million inclusive of $39 million related to noncontrolling interest on AEP’s balance sheet. Potential alternatives may include continued ownership or a sale. AEP management has not made a decision regarding the potential alternatives, but expects to complete the strategic evaluation by the end of 2023.

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Federal Tax Legislation

In August 2022, President Biden signed H.R. 5376 into law, commonly known as the Inflation Reduction Act of 2022, or IRA.

In June 2023, the IRS issued temporary regulations related to the transfer of tax credits. In the third quarter of 2023, AEP, on behalf of PSO and SWEPCo, entered into a transferability agreement with a nonaffiliated party to sell PTCs resulting in cash proceeds of approximately $80 million expected in the fourth quarter of 2023. AEP expects to continue to explore the ability to efficiently monetize its tax credits through third party transferability agreements. See Note 11 - Income Taxes for additional information.

Termination of Planned Disposition of KPCo and KTCo

In October 2021, AEP entered into a Stock Purchase Agreement (SPA) to sell KPCo and KTCo to Liberty Utilities Co., a subsidiary of Algonquin Power & Utilities Corp. (Liberty), for approximately a $2.85 billion enterprise value. The SPA was subsequently amended in September 2022 to reduce the purchase price to approximately $2.646 billion. The sale required approval from the KPSC and from the FERC under Section 203 of the Federal Power Act. The SPA contained certain termination rights if the closing of the sale did not occur by April 26, 2023.

In May 2022, the KPSC approved the sale of KPCo to Liberty subject to certain conditions contingent upon the closing of the sale. In December 2022, the FERC issued an order denying, without prejudice, authorization of the proposed sale stating the applicants failed to demonstrate the proposed transaction will not have an adverse effect on rates. In February 2023, a new filing for approval under Section 203 of the Federal Power Act was submitted. In March 2023, the KPSC and other intervenors made filings recommending the FERC reject AEP and Liberty’s new Section 203 application seeking approval of the sale.

In April 2023, AEP, AEPTCo and Liberty entered into a Mutual Termination Agreement (Termination Agreement) terminating the SPA. The parties entered into the Termination Agreement as all of the conditions precedent to closing the sale could not be satisfied prior to April 26, 2023.

The impact of the Termination Agreement did not have a material impact on AEP’s statements of income for the three and nine months ended September 30, 2023. Upon reverting to a held and used model in the first quarter of 2023, AEP was required to present its investment in the Kentucky Operations at the lower of fair value or historical carrying value which resulted in a $335 million reduction recorded in Property, Plant and Equipment. The reduced investment in KPCo’s assets is being amortized over the 30 year average useful life of the KPCo assets.

Regulatory Matters

AEP’s public utility subsidiaries are involved in rate and regulatory proceedings at the FERC and their state commissions.  Depending on the outcomes, these rate and regulatory proceedings can have a material impact on results of operations, cash flows and possibly financial condition. AEP is currently involved in the following key proceedings. See Note 4 - Rate Matters for additional information.

•2012 Texas Base Rate Case - In 2012, SWEPCo filed a request with the PUCT to increase annual base rates primarily due to the completion of the Turk Plant. In 2013, the PUCT issued an order affirming the prudence of the Turk Plant but determined that the Turk Plant’s Texas jurisdictional capital cost cap established in a previous Certificate of Convenience and Necessity case also limited SWEPCo’s recovery of AFUDC in addition to limits on its recovery of cash construction costs. Upon rehearing in 2014, the PUCT reversed its initial ruling and determined that AFUDC was excluded from the Turk Plant’s Texas jurisdictional capital cost cap. In 2017, the Texas District Court upheld the PUCT’s 2014 order and intervenors filed appeals with the Texas Third Court of Appeals. In August 2021, the Texas Third Court of Appeals reversed the Texas District Court judgment affirming the PUCT’s order on AFUDC, concluding that the language of the PUCT’s original 2008 order intended to include AFUDC in the Texas jurisdictional capital cost cap, and remanded the case to the PUCT for future proceedings. In

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November 2021, SWEPCo and the PUCT submitted Petitions for Review with the Texas Supreme Court. In October 2022, the Texas Supreme Court denied the Petitions for Review submitted by SWEPCo and the PUCT. In December 2022, SWEPCo and the PUCT filed requests for rehearing with the Texas Supreme Court. In June 2023, the Texas Supreme Court denied SWEPCo’s request for rehearing and the case was remanded to the PUCT for future proceedings. In October 2023, SWEPCo filed testimony with the PUCT in the remanded proceeding recommending no refund or disallowance.

Management does not believe a disallowance of capitalized Turk Plant costs or a revenue refund is probable as of September 30, 2023. However, if SWEPCo is ultimately unable to recover AFUDC in excess of the Texas jurisdictional capital cost cap, it would be expected to result in a pretax net disallowance ranging from $80 million to $90 million. In addition, if SWEPCo is ultimately unable to recover AFUDC in excess of the Texas jurisdictional cost cap, SWEPCo estimates it may be required to make customer refunds, including interest, ranging from $0 to $200 million related to revenues collected from February 2013 through September 2023 and such determination may reduce SWEPCo’s future revenues by approximately $15 million on an annual basis.

•Litigation Related to Ohio House Bill 6 (HB 6) - In July 2019, HB 6, which offered incentives for power-generating facilities with zero or reduced carbon emissions, was signed into law by the Ohio Governor. HB 6 terminated energy efficiency programs as of December 31, 2020, including OPCo’s shared savings revenues of $26 million annually and phased out renewable mandates after 2026. HB 6 also provided for continued recovery of existing renewable energy contracts on a bypassable basis through 2032 and included a provision for continued recovery of OVEC costs through 2030 which is allocated to all electric distribution utility customers in Ohio on a non-bypassable basis. OPCo’s Inter-Company Power Agreement for OVEC terminates in June 2040. In July 2020, an investigation led by the U.S. Attorney’s Office resulted in a federal grand jury indictment of the Speaker of the Ohio House of Representatives, Larry Householder, four other individuals, and Generation Now, an entity registered as a 501(c)(4) social welfare organization, in connection with an alleged racketeering conspiracy involving the adoption of HB 6. Certain defendants in that case had previously plead guilty and, in March 2023, a federal jury convicted Larry Householder and another individual of participating in the racketeering conspiracy. In 2021, four AEP shareholders filed derivative actions purporting to assert claims on behalf of AEP against certain AEP officers and directors. See “Litigation Related to Ohio House Bill 6” section of Litigation below for additional information.

In March 2021, the Governor of Ohio signed legislation that, among other things, repealed the payments to the nonaffiliated owner of Ohio’s nuclear power plants that were previously authorized under HB 6. The new legislation, House Bill 128, went into effect in May 2021 and leaves unchanged other provisions of HB 6 regarding energy efficiency programs, recovery of renewable energy costs and recovery of OVEC costs. To the extent that the law changes or OPCo is unable to recover the costs of renewable energy contracts on a bypassable basis by the end of 2032, recover costs of OVEC after 2030 or incurs significant costs associated with the derivative actions, it could reduce future net income and cash flows and impact financial condition.

•FERC 2021 PJM and SPP Transmission Formula Rate Challenge - In March 2023 and May 2023, certain joint customers submitted a complaint and a formal challenge at the FERC related to the 2022 Annual Update of the 2021 Transmission Formula Rates of the AEP transmission owning subsidiaries within PJM and SPP, respectively. These challenges primarily relate to stand-alone treatment of NOLCs in the transmission formula rates of the AEP transmission owning subsidiaries. AEPSC, on behalf of the AEP transmission owning subsidiaries within PJM and SPP, filed answers to the joint formal challenge and complaint with the FERC in the second quarter of 2023.

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The Registrants transitioned to stand-alone treatment of NOLCs in its PJM and SPP transmission formula rates beginning with the 2022 projected transmission revenue requirements and 2021 true-up to actual transmission revenue requirements, and provided notice of this change in informational filings made with the FERC. Stand-alone treatment of NOLCs for transmission formula rates increased the annual revenue requirements for years 2023, 2022 and 2021 by $60 million, $69 million and $78 million, respectively. Through the third quarter of 2023, the Registrants’ financial statements reflect a provision for refund for certain NOLC revenues billed by PJM and SPP. If the Registrants are required to make refunds as a result of these challenges, it could reduce future net income and cash flows and impact financial condition.

The Registrants are also transitioning to stand-alone treatment of NOLCs in retail jurisdiction rate filings. As a result of retail jurisdiction base rate cases in Arkansas, Indiana, Louisiana, Oklahoma and Texas, inclusion of NOLCs in rates in those jurisdictions is contingent upon a supportive private letter ruling from the IRS. If the Registrants are successful in transitioning to stand-alone treatment of NOLCs, it could have a material, favorable impact on future net income.

•Securitization Legislation - In March 2023, Kentucky (Senate Bill 192) and West Virginia (House Bill 3308) both passed legislation that would allow the securitization of certain plant assets. Eligible costs to be securitized in Kentucky include certain retired generation costs with a minimum value of $200 million as well as certain other regulatory assets, including deferred extraordinary storm costs, as long as the cumulative total requested for securitization is at least $275 million. Eligible costs to be securitized in West Virginia include historical, and if deemed appropriate by the commission, projected costs relating to environmental control costs, expanded net energy costs, storm recovery costs and undepreciated generation utility plant balances.

In April 2023, APCo and WPCo submitted their 2023 annual ENEC filing with the WVPSC proposing two alternatives to increase ENEC rates effective September 1, 2023. One of the alternatives included an option to securitize approximately $1.9 billion of assets. In June 2023, KPCo filed a request with the KPSC requesting to finance, through the issuance of securitization bonds, approximately $471 million of regulatory assets. See Note 4 - Rate Matters for additional information.

In April 2023, the Virginia General Assembly approved the Governor’s proposed changes to House Bill 1777, modifying APCo’s earnings review and base rate process, with a biennial earnings review replacing APCo’s current triennial earnings review. APCo will submit its first biennial review filing in 2024 using only a 2023 test year. Also included in this approved legislation is the option for APCo to securitize deferred fuel costs.

•Texas Legislation - In May 2023, legislation (Senate Bill 1016) was passed in Texas allowing certain financially based employee incentive compensation to be recovered. As a result of this law change, in the second quarter of 2023 AEP Texas and SWEPCo recognized a favorable impact to pretax income of approximately $27 million and $6 million, respectively.

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Utility Rates and Rate Proceedings

The Registrants file rate cases with their regulatory commissions in order to establish fair and appropriate electric service rates to recover their costs and earn a fair return on their investments. The outcomes of these regulatory proceedings impact the Registrants’ current and future results of operations, cash flows and financial position.

The following tables show the Registrants’ completed and pending base rate case proceedings in 2023. See Note 4 - Rate Matters for additional information.

Completed Base Rate Case Proceedings

		Approved Revenue			Approved	New Rates
Company	Jurisdiction	Requirement Increase			ROE	Effective
		(in millions)
SWEPCo	Louisiana	$	21.0	(a)	9.5%	February 2023

(a)See “2020 Louisiana Base Rate Case” section of Note 4 in the 2022 Annual Report for additional information.

Pending Base Rate Case Proceedings

							Commission Staff/
		Filing	Requested Revenue			Requested	Intervenor Range of
Company	Jurisdiction	Date	Requirement Increase			ROE	Recommended ROE
			(in millions)
PSO	Oklahoma	November 2022	$	173.0	(a)	10.4%	8.6%-9.5%
APCo	Virginia	March 2023	213.0			10.6%	9.5%
KPCo	Kentucky	June 2023	94.0			9.9%	9.3%-9.7%
I&M	Indiana	August 2023	116.0			10.5%	(b)
I&M	Michigan	September 2023	34.0			10.5%	(c)

(a)Requested revenue requirement increase, net of existing rider revenues and certain incremental renewable facility benefits expected to be provided to customers through riders. See “2022 Oklahoma Base Rate Case” section of Note 4 for additional information.

(b)Intervenor testimony is due in November 2023.

(c)Intervenor testimony is due in January 2024.

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Deferred Fuel Costs

Increases in fuel and purchased power prices in excess of amounts included in fuel-related revenues has led to an increase in the under collection of fuel costs from customers in most jurisdictions in recent years. The table below illustrates the increase (decrease) in the deferred fuel regulatory assets by company and jurisdiction, excluding the impacts of the February 2021 severe winter weather event. See the “February 2021 Severe Winter Weather Impacts in SPP” section in Note 4 for additional information. If any of these deferred fuel costs are not recoverable, it could reduce future net income and cash flows and impact financial condition.

		Traditional FAC	As of		As of		Increase/
Company	Jurisdiction	Recovery Reset	September 30, 2023		December 31, 2022		(Decrease)
			(in millions)
APCo	Virginia (a)	Annually	$	286.9	$	407.9	$	(121.0)
APCo	West Virginia	Annually	301.3		288.5		12.8
I&M	Indiana	Bi-Annually	—		38.1		(38.1)
I&M	Michigan	Annually	13.3		9.0		4.3
PSO	Oklahoma (b)	Annually	168.2		431.5		(263.3)
SWEPCo	Arkansas	Annually	30.0		65.8		(35.8)
SWEPCo	Texas (c)	Tri-Annually	134.7		191.4		(56.7)
KPCo	Kentucky	Monthly	6.3		23.2		(16.9)
WPCo	West Virginia	Annually	273.5		231.1		42.4
		Total	$	1,214.2	$	1,686.5	$	(472.3)

(a)Includes $146 million and $223 million as of September 30, 2023 and December 31, 2022, respectively, of noncurrent deferred fuel classified as a Regulatory Asset on APCo’s balance sheets.

(b)Includes $0 and $253 million as of September 30, 2023 and December 31, 2022, respectively, of noncurrent deferred fuel classified as a Regulatory Asset on PSO’s balance sheets.

(c)Includes $74 million and $0 as of September 30, 2023 and December 31, 2022, respectively, of noncurrent deferred fuel classified as a Regulatory Asset on SWEPCo’s balance sheets.

The AEP utility subsidiaries are working with various state commissions on the timing of recovering deferred fuel balances and the following are recent developments relating to the recovery of deferred fuel:

In April 2023, the WVPSC Staff submitted a prudency review prepared by an independent consultant retained by the WVPSC staff. Adoption of the consultant report’s findings by the WVPSC could result in a disallowance of up to $285 million. Management disagrees with the conclusions and recommendations contained in the consultant’s report and a hearing was held with the WVPSC in September 2023. APCo and WPCo are awaiting a WVPSC order addressing: (a) the prudency review requested by the WVPSC regarding 2021 and 2022 ENEC under-recovery balances, (b) potential securitization of ENEC under-recovery balances, Amos and Mountaineer Plant property balances and deferred storm costs and (c) potential further adjustment to ENEC rates. An order is anticipated in the fourth quarter of 2023. In September 2023, APCo received an order from the WVPSC authorizing an $89 million annual increase in ENEC rates for the Companies’ forecasted costs for the period September 2023 through August 2024. See “ENEC Filings” section of Note 4 for additional information.

In September 2023, APCo submitted its annual Virginia fuel factor filing with the Virginia SCC requesting to recover a projected October 31, 2023 Virginia fuel under-recovered balance of $273 million over two years. Interim Virginia FAC rates were implemented in November 2023. An order from the Virginia SCC is expected in the first quarter of 2024.

In April 2023, the PUCT issued an order approving an interim fuel surcharge, effective February 2023, allowing SWEPCo to recover $83 million of non Sabine and Oxbow mine related fuel costs through June 2024. In September 2023, an unopposed settlement agreement was approved by the PUCT that allows SWEPCo to recover $81 million of Sabine and Oxbow mine related fuel costs through 2035. See “Dolet Hills Power Station

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and Related Fuel Operations” and “Pirkey Plant and Related Fuel Operations” sections in Note 4 for additional information related to the recovery of fuel costs in SWEPCo’s Arkansas and Louisiana jurisdictions.

Renewable Generation

The growth of AEP’s regulated renewable generation portfolio reflects the company’s strategy to diversify generation resources to provide clean energy to customers that meet both their energy and capacity needs.

Significant Renewable Generation Placed Into Service

In 2023, AEP acquired and placed into service 159 MWs of owned renewable generation facilities totaling approximately $154 million.

Significant Approved Renewable Generation Filings

AEP has received regulatory approvals from various state regulatory commissions to acquire approximately 2,811 MWs of owned renewable generation facilities, totaling approximately $6.6 billion, in addition to 557 MWs of renewable purchase power agreements, as included in the following table:

Company	Generation Type	Expected Commercial Operation	Owned/PPA	Generating Capacity
				(in MWs)
APCo (a)	Solar	Q2 2024 through Q1 2026	PPA	204
APCo (a)	Wind	Q3 2025 through Q1 2026	Owned	347
I&M	Solar	Q4 2025	PPA	280
I&M (b)	Solar	Q2 2026	Owned	469
PSO	Solar	Q2 2025 through Q4 2025	Owned	443
PSO	Wind	Q1 2025 through Q2 2026	Owned	553
SWEPCo (c)	Solar	Q2 2025 through Q4 2025	Owned/PPA	273
SWEPCo (c)	Wind	Q4 2024 through Q4 2025	Owned	799
Total Approved Renewable Projects				3,368

(a)In September 2023, the Virginia SCC issued an order approving a 143 MW owned project and 204 MWs of PPAs, approval from the WVPSC is pending.

(b)Projects fully approved by the IURC and partially approved by the MPSC, final approval pending from the MPSC for 245 MW of owned solar.

(c)Includes approvals by the APSC and LPSC for 999 MWs of owned projects. Additionally, the LPSC approved the flex-up option, allowing SWEPCo to recover the portion of the projects denied by the PUCT.

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Significant Renewable Generation Requests for Proposal (RFP)

As part of AEP’s transition to diversify the company’s regulated generation resources and build its renewable generation portfolio, RFPs have been issued to identify potential renewable projects. The table below includes RFPs recently issued for owned generation and purchased power generation. These projects would be subject to regulatory approval.

Company	Issuance Date	Projected In-Service Dates	Generation Type	Generating Capacity
				(in MWs)
I&M	March 2023	Year End 2027	Wind (a)	800
I&M	March 2023	Year End 2027	Solar (a)(b)	850
APCo	April 2023	Year End 2026	Wind and/or Solar (c)(d)	800
KPCo	September 2023	Year end 2027	Wind and/or Solar (e)	1,300
Total Significant RFPs				3,750

(a)RFP is an all-source solicitation seeking proposals for both owned projects and PPAs from various types of generation including 315 MWs of storage (a portion of which may derive from solar/storage hybrid projects) and 540 MWs of natural gas.

(b)Includes consideration of up to 300 MWs of hybrid solar with up to 60 MWs of battery storage.

(c)Includes RFP for up to 200 MWs of PPAs.

(d)Includes an option for battery storage.

(e)RFP is an all-source solicitation seeking proposals for PPAs for solar, wind, thermal resources and/or standalone storage for up to approximately 875 MWs of PJM-accredited summer capacity and approximately 1,300 MWs of PJM-accredited winter capacity.

Merchant Portion of Turk Plant

SWEPCo constructed the Turk Plant, a base load 600 MW (650 MW net maximum capacity) pulverized coal ultra-supercritical generating unit in Arkansas, which was placed in-service in December 2012 and is included in the Vertically Integrated Utilities segment. SWEPCo owns 73% (440 MWs/477 MWs) of the Turk Plant and operates the facility.

Approximately 20% of SWEPCo’s portion of the Turk Plant output is currently not subject to cost-based rate recovery in Arkansas. This portion of the plant’s output is being sold into the wholesale market. Approximately 80% of the Turk Plant investment is recovered under retail cost-based rate recovery in Texas, Louisiana and through SWEPCo’s wholesale customers under FERC-approved rates. In November 2022, SWEPCo filed a Certificate of Public Convenience and Necessity with the APSC for approval to operate the Turk plant to serve Arkansas customers and recover the associated costs through a cost recovery rider. Cost-based recovery of the Turk Plant would aid SWEPCo’s near-term capacity needs and support compliance with SPP’s 2023 increased capacity planning reserve margin requirements. In April 2023, intervenors filed testimony recommending the APSC deny the Certificate of Public Convenience and Necessity on the basis that the Turk Plant is not the least cost alternative. In June 2023, SWEPCo filed rebuttal testimony with the APSC. In July 2023, additional intervenor testimony was filed with the APSC by the Attorney General of Arkansas and the APSC staff with recommendations consistent with the previously filed April 2023 intervenor testimony. A hearing was held in October 2023 and an order is expected in the fourth quarter of 2023. As of September 30, 2023, the net book value of the Turk Plant was $1.4 billion, before cost of removal including CWIP and inventory. If SWEPCo cannot ultimately recover its investment and expenses related to the Arkansas retail portion of the Turk Plant, it could reduce future net income and cash flows and impact financial condition.

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LITIGATION

In the ordinary course of business, AEP is involved in employment, commercial, environmental and regulatory litigation. Since it is difficult to predict the outcome of these proceedings, management cannot predict the eventual resolution, timing or amount of any loss, fine or penalty. Management assesses the probability of loss for each contingency and accrues a liability for cases that have a probable likelihood of loss if the loss can be estimated.  Adverse results in these proceedings have the potential to reduce future net income and cash flows and impact financial condition. See Note 4 – Rate Matters and Note 5 – Commitments, Guarantees and Contingencies for additional information.

Litigation Related to Ohio House Bill 6 (HB 6)

In 2019, Ohio adopted and implemented HB 6 which benefits OPCo by authorizing rate recovery for certain costs including renewable energy contracts and OVEC’s coal-fired generating units. OPCo engaged in lobbying efforts and provided testimony during the legislative process in connection with HB 6. In July 2020, an investigation led by the U.S. Attorney’s Office resulted in a federal grand jury indictment of an Ohio legislator and associates in connection with an alleged racketeering conspiracy involving the adoption of HB 6. After AEP learned of the criminal allegations against the Ohio legislator and others relating to HB 6, AEP, with assistance from outside advisors, conducted a review of the circumstances surrounding the passage of the bill. Management does not believe that AEP was involved in any wrongful conduct in connection with the passage of HB 6.

In August 2020, an AEP shareholder filed a putative class action lawsuit in the U. S. District Court for the Southern District of Ohio against AEP and certain of its officers for alleged violations of securities laws. In December 2021, the district court issued an opinion and order dismissing the securities litigation complaint with prejudice, determining that the complaint failed to plead any actionable misrepresentations or omissions. The plaintiffs did not appeal the ruling.

In January 2021, an AEP shareholder filed a derivative action in the U.S. District Court for the Southern District of Ohio purporting to assert claims on behalf of AEP against certain AEP officers and directors. In February 2021, a second AEP shareholder filed a similar derivative action in the Court of Common Pleas of Franklin County, Ohio. In April 2021, a third AEP shareholder filed a similar derivative action in the U.S. District Court for the Southern District of Ohio and a fourth AEP shareholder filed a similar derivative action in the Supreme Court for the State of New York, Nassau County. These derivative complaints allege the officers and directors made misrepresentations and omissions similar to those alleged in the putative securities class action lawsuit filed against AEP. The derivative complaints together assert claims for: (a) breach of fiduciary duty, (b) waste of corporate assets, (c) unjust enrichment, (d) breach of duty for insider trading and (e) contribution for violations of sections 10(b) and 21D of the Securities Exchange Act of 1934; and seek monetary damages and changes to AEP’s corporate governance and internal policies among other forms of relief. The court entered a scheduling order in the New York state court derivative action staying the case other than with respect to briefing the motion to dismiss. AEP filed substantive and forum-based motions to dismiss on April 29, 2022. On September 13, 2022, the New York state court granted the forum-based motion to dismiss with prejudice and the plaintiff subsequently filed a notice of appeal with the New York appellate court. On January 20, 2023, the New York plaintiff filed a motion to intervene in the pending Ohio federal court action and withdrew his appeal in New York. The two derivative actions pending in federal district court in Ohio have been consolidated and the plaintiffs in the consolidated action filed an amended complaint. AEP filed a motion to dismiss the amended complaint and subsequently filed a brief in opposition to the New York plaintiffs’ motion to intervene in the consolidated action in Ohio. On March 20, 2023, the federal district court issued an order granting the motion to dismiss with prejudice and denying the New York plaintiffs’ motion to intervene. On April 20, 2023, one of the plaintiffs filed a notice of appeal to the U.S. Court of Appeals for the Sixth Circuit of the Ohio federal district court order dismissing the consolidated action and denying the intervention. On June 15, 2022, the Ohio state court entered an order continuing the stays of that case until the final resolution of the consolidated derivative actions pending in Ohio federal district court. The defendants will continue to defend against the claims. Management is unable to determine a range of potential losses that is reasonably possible of occurring.

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In March 2021, AEP received a litigation demand letter from counsel representing a purported AEP shareholder. The litigation demand letter was directed to the Board of Directors of AEP (AEP Board) and contained factual allegations involving HB 6 that were generally consistent with those in the derivative litigation filed in state and federal court. The shareholder that sent the letter has since withdrawn the litigation demand, which is now terminated and of no further effect. In April 2023, AEP received a litigation demand from counsel representing the purported AEP shareholder who filed the dismissed derivative action in New York state court and unsuccessfully tried to intervene in the consolidated derivative actions in Ohio federal court. The litigation demand letter is directed to the AEP Board and contains factual allegations involving HB 6 that are generally consistent with those in the derivative litigation filed in state and federal court. The letter demands, among other things, that the AEP Board undertake an independent investigation into alleged legal violations by certain current and former directors and officers, and that AEP commence a civil action for breaches of fiduciary duty and related claims against any individuals who allegedly harmed AEP. The AEP Board will act in response to the letter as appropriate. Management is unable to determine a range of potential losses that is reasonably possible of occurring.

In May 2021, AEP received a subpoena from the SEC’s Division of Enforcement seeking various documents, including documents relating to the passage of HB 6 and documents relating to AEP’s policies and financial processes and controls. In August 2022, AEP received a second subpoena from the SEC seeking various additional documents relating to its ongoing investigation. AEP is cooperating fully with the SEC’s investigation, which has included taking testimony from certain individuals and inquiries regarding Empowering Ohio’s Economy, Inc., which is a 501(c)(4) social welfare organization, and related disclosures. AEP and the SEC are engaged in discussions about a possible resolution of the SEC’s investigation and potential claims under the securities laws, the outcome of which cannot be predicted and could subject AEP to civil penalties and other remedial measures. Management is unable to determine a range of potential losses that is reasonably possible of occurring, but management does not believe the results of this investigation or a possible resolution thereof will have a material impact on results of operations, cash flows or financial condition.

Claims for Indemnification Made by Owners of the Gavin Power Station

In November 2022, the Federal EPA issued a final decision denying Gavin Power LLC’s requested extension to allow a CCR surface impoundment at the Gavin Power Station to continue to receive CCR and non-CCR waste streams after April 11, 2021 until May 4, 2023 (the Gavin Denial). As part of the Gavin Denial, the Federal EPA made several determinations related to the CCR Rule (see “Coal Combustion Residual (CCR) Rule” section below for additional information), including a determination that the closure of the 300 acre unlined fly ash reservoir (FAR) is noncompliant with the CCR Rule in multiple respects. The Gavin Power Station was formerly owned and operated by AEP and was sold to Gavin Power LLC and Lightstone Generation LLC in 2017. Pursuant to the PSA, AEP maintained responsibility to complete closure of the FAR in accordance with the closure plan approved by the Ohio EPA which was completed in July 2021. The PSA contains indemnification provisions, pursuant to which the owners of the Gavin Power Station have notified AEP they believe they are entitled to indemnification for any damages that may result from these claims, including any future enforcement or litigation resulting from the Federal EPA’s determinations of noncompliance with various aspects of the CCR Rule as part of the Gavin Denial. The owners of the Gavin Power Station have also sought indemnification for landowner claims for property damage allegedly caused by modifications to the FAR. Management does not believe that the owners of the Gavin Power Station have any valid claim for indemnity or otherwise against AEP under the PSA. In addition, Gavin Power LLC, several AEP subsidiaries, and other parties have filed Petitions for Review of the Gavin Denial with the U.S. Court of Appeals for the District of Columbia Circuit. Management is unable to determine a range of potential losses that is reasonably possible of occurring.

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Claims for Damages Related to Sabine Lignite Mining Agreement

In May 2023, North American Coal Corporation (NACC) and Sabine, a subsidiary of NACC, filed suit against SWEPCo in Texas state court for breach of the Lignite Mining Agreement (LMA) between Sabine and SWEPCo. NACC and Sabine assert that the terms of the LMA require SWEPCo to continue operating the Pirkey Plant and obtaining coal from the Sabine mine through 2035 and that SWEPCo has breached the agreement by closing the plant. In August 2023, a settlement agreement was reached and the suit was dismissed by the Texas state court. The settlement agreement did not have a material impact on SWEPCo’s net income, cash flows or financial condition.

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ENVIRONMENTAL ISSUES

AEP has a substantial capital investment program and incurs additional operational costs to comply with environmental control requirements.  Additional investments and operational changes will be made in response to existing and anticipated requirements to reduce emissions from fossil generation and in response to rules governing the beneficial use and disposal of coal combustion by-products, clean water and renewal permits for certain water discharges.

AEP is engaged in litigation about environmental issues, was notified of potential responsibility for the clean-up of contaminated sites and incurred costs for disposal of SNF and future decommissioning of the nuclear units.  Management is engaged in the development of possible future requirements including the items discussed below.  

AEP will seek recovery of expenditures for pollution control technologies and associated costs from customers through rates in regulated jurisdictions.  Environmental rules could result in accelerated depreciation, impairment of assets or regulatory disallowances.  If AEP cannot recover the costs of environmental compliance, it would reduce future net income and cash flows and impact financial condition.

Environmental Controls Impact on the Generating Fleet

The rules and proposed environmental controls discussed below will have an impact on AEP System generating units.  Management continues to evaluate the impact of these rules, project scope and technology available to achieve compliance.  As of September 30, 2023, the AEP System owned generating capacity of approximately 23,300 MWs, of which approximately 10,700 MWs were coal-fired.  Management continues to evaluate the economic feasibility of environmental investments on AEP’s fossil generation fleet and to refine the cost estimates of complying with these rules and evaluate other impacts of the environmental proposals on fossil generation.

The cost estimates will change depending on the timing of implementation and whether the Federal EPA provides flexibility in finalizing proposed rules or revising certain existing requirements.  The cost estimates will also change based on: (a) potential state rules that impose more stringent standards, (b) additional rulemaking activities in response to court decisions, (c) actual performance of the pollution control technologies installed, (d) changes in costs for new pollution controls, (e) new generating technology developments, (f) total MWs of capacity retired and replaced, including the type and amount of such replacement capacity, (g) compliance with the Federal EPA’s revised coal combustion residual rules and (h) other factors. 

Clean Air Act Requirements

The CAA establishes a comprehensive program to protect and improve the nation’s air quality and control sources of air emissions. The states implement and administer many of these programs and could impose additional or more stringent requirements. The primary regulatory programs that continue to drive investments in AEP’s existing generating units include: (a) periodic revisions to NAAQS and the development of SIPs to achieve more stringent standards, (b) implementation of the regional haze program by the states and the Federal EPA, (c) regulation of hazardous air pollutant emissions under MATS, (d) implementation and review of CSAPR and (e) the Federal EPA’s regulation of greenhouse gas emissions from fossil generation under Section 111 of the CAA. Notable developments in significant CAA regulatory requirements affecting AEP’s operations are discussed in the following sections.

National Ambient Air Quality Standards

The Federal EPA periodically reviews and revises the NAAQS for criteria pollutants under the CAA. Revisions tend to increase the stringency of the standards, which in turn may require AEP to make investments in pollution control equipment at existing generating units, or, since most units are already well controlled, to make changes in how units are dispatched and operated. In January 2023, the Federal EPA announced its proposed decision to strengthen the primary (health-based) annual PM2.5 standard. Management cannot currently predict if any changes to these standards are likely to be finalized or what such changes may be, but will continue to monitor this issue and any future rulemakings.

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Regional Haze

The Federal EPA issued a Clean Air Visibility Rule (CAVR) in 2005, which could require power plants and other facilities to install best available retrofit technology to address regional haze in federal parks and other protected areas. CAVR is implemented by the states, through SIPs, or by the Federal EPA, through FIPs. In 2017, the Federal EPA revised the rules governing submission of SIPs to implement the visibility programs. Petitions for review of the final rule revisions have been filed in the U.S. Court of Appeals for the District of Columbia Circuit.

In Texas, the Federal EPA disapproved portions of the Texas regional haze SIP and finalized a FIP that allows participation in the CSAPR ozone season program to satisfy the NOX regional haze obligations for electric generating units in Texas. Additionally, the Federal EPA finalized an intrastate SO2 emissions trading program based on CSAPR allowance allocations. Legal challenges to these various rulemakings are pending in both the U.S. Court of Appeals for the Fifth Circuit and the U.S. Court of Appeals for the District of Columbia Circuit. Management cannot predict the outcome of that litigation, although management supports the intrastate trading program as a compliance alternative to source-specific controls and has intervened in the litigation in support of the Federal EPA.

Cross-State Air Pollution Rule

CSAPR is a regional trading program that the Federal EPA began implementing in 2015, which was designed to address interstate transport of emissions that contribute significantly to non-attainment and interfere with maintenance of the 1997 ozone NAAQS and the 1997 and 2006 PM NAAQS in downwind states.  CSAPR relies on SO2 and NOX allowances and individual state budgets to compel further emission reductions from electric utility generating units.  Interstate trading of allowances is allowed on a restricted basis. The Federal EPA has revised, or updated, the CSAPR trading programs several times since they were established.

In January 2021, the Federal EPA finalized a revised CSAPR, which substantially reduced the ozone season NOX budgets for several states, including states where AEP operates, beginning in ozone season 2021. Management believes it can meet the requirements of the rule in the near term, and is evaluating its compliance options for later years, when the budgets are further reduced.

In addition, in February 2023, the Federal EPA Administrator finalized the disapproval of interstate transport SIPs submitted by 19 states addressing the 2015 Ozone NAAQS. Disapproval of the SIPs provides the Federal EPA with authority to impose a FIP for those states, replacing the SIPs that were disapproved. Petitions for review of the SIP disapprovals for several states have been filed in federal courts of appeals by states, utilities and other industry parties and the federal courts have stayed the disapprovals of SIPs submitted by twelve states, including Arkansas, Kentucky, Oklahoma, Texas and West Virginia. In March 2023, the Federal EPA finalized a FIP that further revises the ozone season NOX budgets under the existing CSAPR program in states to which the FIP applies. The FIP went into effect in August 2023 and has also been challenged in the U.S. Court of Appeals for the D.C. Circuit and in several other federal circuits. In light of the various court stays of the SIP disapprovals, the Federal EPA has issued two interim final rules that adjust or stay certain requirements of the FIP consistent with the court orders, pending resolution of the litigation. Management continues to monitor the outcome of various SIP challenges and evaluate the impacts of the FIP and cannot predict the outcome of the litigation.

Climate Change, CO2 Regulation and Energy Policy

In May 2023, the Federal EPA proposed greenhouse gas standards and guidelines for new and existing fossil-fuel fired sources. The proposal relies heavily on carbon capture and sequestration and natural gas co-firing as means to reduce CO2 emissions from coal fired plants and hydrogen co-firing and carbon capture and sequestration to reduce CO2 emissions from gas turbines. Management is evaluating the proposed rule.

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While no federal regulatory requirements to reduce CO2 emissions are in place, AEP has taken action to reduce and offset CO2 emissions from its generating fleet. AEP expects CO2 emissions from its operations to continue to decline due to the retirement of some of its coal-fired generation units, and actions taken to diversify the generation fleet and increase energy efficiency where there is regulatory support for such activities. The majority of the states where AEP has generating facilities passed legislation establishing renewable energy, alternative energy and/or energy efficiency requirements that can assist in reducing carbon emissions.

In October 2022, AEP announced new intermediate and long-term CO2 emission reduction goals, based on the output of the company’s integrated resource plans, which take into account economics, customer demand, grid reliability and resiliency, regulations and the company’s current business strategy. AEP adjusted its near-term CO2 emission reduction target from a 2000 baseline to a 2005 baseline, upgraded its 80% reduction by 2030 target to include full Scope 1 emissions and accelerated its net-zero goal by five years to 2045. AEP’s total Scope 1 greenhouse gas (GHG) emissions in 2022 were approximately 52.5 million metric tons CO2e, approximately a 65% reduction from AEP’s 2005 Scope 1 GHG emissions (inclusive of emission reductions that result from plants that have been sold). AEP has made significant progress in reducing CO2 emissions from its power generation fleet and expects its emissions to continue to decline. Technological advances, including energy storage, will determine how quickly AEP can achieve zero emissions while continuing to provide reliable, affordable power for customers.

Excessive costs to comply with future legislation or regulations have led to the announcement of early plant closures and could force AEP to close additional coal-fired generation facilities earlier than their estimated useful life. If AEP is unable to recover the costs of its investments, it would reduce future net income and cash flows and impact financial condition.

MATS Rule

In April 2023, the Federal EPA issued a proposed rule that would revise the MATS for power plants. The proposed rule includes a more stringent standard for emissions of filterable PM for coal-fired electric generating units, as well as a new mercury standard for lignite-fired electric generating units. The proposed rule also requires the installation and operation of continuous emissions monitors for PM. Management is evaluating the impacts of the rule as proposed and will continue to monitor the rulemaking.

CCR Rule

The Federal EPA’s CCR rule regulates the disposal and beneficial re-use of CCR, including fly ash and bottom ash created from coal-fired generating units and FGD gypsum generated at some coal-fired plants.  The rule applies to active and inactive CCR landfills and surface impoundments at facilities of active electric utility or independent power producers.

In 2020, the Federal EPA revised the CCR rule to include a requirement that unlined CCR storage ponds cease operations and initiate closure by April 11, 2021. The revised rule provides two options that allow facilities to extend the date by which they must cease receipt of coal ash and close the ponds.

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The first option provides an extension to cease receipt of CCR no later than October 15, 2023 for most units, and October 15, 2024 for a narrow subset of units; however, the Federal EPA’s grant of such an extension requires a satisfactory demonstration of the need for additional time to develop alternative ash disposal capacity and will be limited to the soonest timeframe technically feasible to cease receipt of CCR. Additionally, each request must undergo formal review, including public comments, and be approved by the Federal EPA. AEP filed applications for additional time to develop alternative disposal capacity at the following plants:

Company	Plant Name	Generating Capacity	Net Book Value (a)			Projected  Retirement Date
		(in MWs)	(in millions)
AEGCo	Rockport Plant	1,310	$	291.7		2028
APCo	Amos Plant	2,930	2,136.8			2040
APCo	Mountaineer Plant	1,320	963.9			2040
I&M	Rockport Plant	1,310	548.2		(b)	2028
KPCo	Mitchell Plant	780	557.0			2040
SWEPCo	Flint Creek Plant	258	256.6			2038
WPCo	Mitchell Plant	780	680.8			2040

(a)Net book value as of September 30, 2023, before cost of removal including CWIP and inventory.

(b)Amount includes a $129 million regulatory asset related to the retired Tanners Creek Plant. The IURC and MPSC authorized recovery of the Tanners Creek Plant regulatory asset over the useful life of Rockport Plant, Unit 1 in 2015 and 2014, respectively.

In January 2022, the Federal EPA proposed to deny several extension requests filed by the other utilities based on allegations that those utilities are not in compliance with the CCR Rule (the January Actions). In November 2022, the Federal EPA finalized one of these denials (the November Denial). The Federal EPA’s allegations of noncompliance rely on new interpretations of the CCR Rule requirements. The January Actions of the Federal EPA and the November Denial have been challenged in the U.S. Court of Appeals for the District of Columbia Circuit as unlawful rulemaking that revises the existing CCR Rule requirements without proper notice and without opportunity for comment. Management is unable to predict the outcome of that litigation.

In July 2022, the Federal EPA proposed conditional approval of the pending extension request for the Mountaineer Plant. The Federal EPA alleged that the Mountaineer Plant was not fully compliant with the CCR Rule. In December 2022, AEP withdrew the pending extension request for the Mountaineer Plant as work to construct new CCR disposal facilities was completed and the extension was no longer needed. In addition, AEP ceased receiving ash in the ponds subject to the extension requests, completed construction of new, CCR Rule compliant facilities at the plants listed in the table above and withdrew the applications for additional time to develop alternative disposal capacity.

Closure and post-closure estimated costs have been included in ARO in accordance with the requirements in the Federal EPA’s final CCR rule. Additional ARO revisions will occur on a site-by-site basis if groundwater monitoring activities conclude that corrective actions are required to mitigate groundwater impacts. AEP may incur significant additional costs complying with the Federal EPA’s CCR Rule, including costs to upgrade or close and replace surface impoundments and landfills used to manage CCR and to conduct any required remedial actions including removal of coal ash. If additional costs are incurred and AEP is unable to obtain cost recovery, it would reduce future net income and cash flows and impact financial condition. Management will continue to participate in rulemaking activities and make adjustments based on new federal and state requirements affecting its ash disposal units.

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Under the second option for obtaining an extension of the April 11, 2021 deadline to cease operation of unlined impoundments, a generating facility may continue operating its existing impoundments without developing alternative CCR disposal, provided the facility commits to cease combustion of coal by a date certain. Under this option, a generating facility had until October 17, 2023 to cease coal-fired operations and to close CCR storage ponds 40 acres or less in size, or through October 17, 2028 for facilities with CCR storage ponds greater than 40 acres in size. Pursuant to this option, AEP informed the Federal EPA of its intent to retire the Pirkey Plant and cease using coal at the Welsh Plant. In March 2023, the Pirkey Plant was retired. The table below summarizes the net book value of Welsh Plant, Units 1 and 3 as of September 30, 2023.

Company	Plant Name and Unit	Generating Capacity	Net Investment (a)		Accelerated Depreciation Regulatory Asset		Projected  Retirement Date
		(in MWs)	(in millions)
SWEPCo	Welsh Plant, Units 1 and 3	1,053	$	368.8	$	115.5	2028	(b)(c)

(a)Net book value including CWIP excluding cost of removal and materials and supplies.

(b)In November 2020, management announced it will cease using coal at the Welsh Plant in 2028.

(c)Unit 1 is currently being recovered through 2027 in the Louisiana jurisdiction and through 2037 in the Arkansas and Texas jurisdictions. Unit 3 is currently being recovered through 2032 in the Louisiana jurisdiction and through 2042 in the Arkansas and Texas jurisdictions.

To date, the Federal EPA has not taken any action on the pending extension request for the Welsh Plant. Under the second option above, AEP may need to recover remaining depreciation and estimated closure costs associated with these plants over a shorter period. If AEP cannot ultimately recover the costs of environmental compliance and/or the remaining depreciation and estimated closure costs associated with these plants in a timely manner, it would reduce future net income and cash flows and impact financial condition.

In May 2023, the Federal EPA proposed revisions to the CCR Rule to expand the scope of the rule to include inactive impoundments at inactive facilities (“legacy CCR surface impoundments”) as well as to establish requirements for currently exempt solid waste management units that involve the direct placement of CCR on the land (“CCR management units”). The proposed rule, if finalized, could have a material adverse impact on net income, cash flows and financial condition if AEP cannot ultimately recover any additional costs of compliance.

Clean Water Act Regulations

The Federal EPA’s ELG rule for generating facilities establishes limits for FGD wastewater, fly ash and bottom ash transport water and flue gas mercury control wastewater, which are to be implemented through each facility’s wastewater discharge permit. A revision to the ELG rule, published in October 2020, established additional options for reusing and discharging small volumes of bottom ash transport water, provided an exception for retiring units and extended the compliance deadline to a date as soon as possible beginning one year after the rule was published but no later than December 2025. Management has assessed technology additions and retrofits to comply with the rule and the impacts of the Federal EPA’s actions on facilities’ wastewater discharge permitting for FGD wastewater and bottom ash transport water. For affected facilities that must install additional technologies to meet the ELG rule limits, permit modifications were filed in January 2021 that reflect the outcome of that assessment. AEP continues to work with state agencies to finalize permit terms and conditions. Other facilities opted to file Notices of Planned Participation (NOPP), pursuant to which the facilities are not required to install additional controls to meet ELG limits provided they make commitments to cease coal combustion by a date certain. In March 2023, the Federal EPA proposed further revisions to the ELG rule which, if finalized, would establish a zero discharge standard for FGD wastewater and bottom ash transport water, and more stringent discharge limits for combustion residual leachate. Management is evaluating the impacts of the proposed rule to operations. Management cannot predict whether the Federal EPA will actually finalize further revisions, but will continue to monitor this issue and will participate in further rulemaking activities as they arise.

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In January 2023, the Federal EPA and the Department of the Army finalized a new rule revising the definition of “waters of the United States,” which became effective in March 2023. The new rule expands the scope of the definition, which means that permits may be necessary where none were previously required and issued permits may need to be reopened to impose additional obligations. A number of legal challenges in courts across the country have resulted in the rule being stayed in more than half of the states, including Arkansas, Indiana, Louisiana, Ohio, Oklahoma, Virginia and West Virginia. Management is evaluating what impacts the revised rule will have on operations.

In May 2023, the United States Supreme Court issued a decision that significantly narrowed the scope of “waters of the United States,” specifically which wetlands can be regulated as waters of the United States. In August 2023, the Federal EPA and the Department of the Army issued a final rule to amend the January 2023 revised definition of “waters of the United States” to conform to the Supreme Court’s decision, which rendered parts of the January 2023 rule invalid. The conforming rule became effective in September 2023 and applies in those states not subject to the court’s stay of the January 2023 rule.

Impact of Environmental Regulation on Coal-Fired Generation

Compliance with extensive environmental regulations requires significant capital investment in environmental monitoring, installation of pollution control equipment, emission fees, disposal, remediation and permits. Management continuously evaluates cost estimates of complying with these regulations which may result in a decision to retire coal-fired generating facilities earlier than their currently estimated useful lives.

The table below summarizes the net book value, as of September 30, 2023, of generating facilities retired or planned for early retirement in advance of the retirement date currently authorized for ratemaking purposes:

Company	Plant	Net Investment (a)		Accelerated Depreciation Regulatory Asset			Actual/Projected Retirement Date		Current Authorized Recovery Period	Annual Depreciation (b)
		(in millions)								(in millions)
PSO	Northeastern Plant, Unit 3	$	112.5	$	159.5		2026		(c)	$	15.0
SWEPCo	Pirkey Plant	—		113.0		(d)	2023		(e)	—
SWEPCo	Welsh Plant, Units 1 and 3	368.8		115.5			2028	(f)	(g)	38.6

(a)Net book value, including CWIP excluding cost of removal and materials and supplies.

(b)These amounts represent the amount of annual depreciation that has been collected from customers over the prior 12-month period.

(c)Northeastern Plant, Unit 3 is currently being recovered through 2040.

(d)Represents Arkansas and Texas jurisdictional share.

(e)As part of the 2021 Arkansas Base Rate Case, the APSC granted SWEPCo regulatory asset treatment. SWEPCo will request recovery including a weighted average cost of capital carrying charge through a future proceeding. The Texas share of the Pirkey Plant will be addressed in SWEPCo’s next base rate case. See the “Coal-Fired Generation Plants” section of Note 4 for additional information.

(f)In November 2020, management announced it will cease using coal at the Welsh Plant in 2028. Management is evaluating a potential conversion to natural gas after 2028 for both units.

(g)Welsh Plant, Unit 1 is being recovered through 2027 in the Louisiana jurisdiction and through 2037 in the Arkansas and Texas jurisdictions. Welsh Plant, Unit 3 is being recovered through 2032 in the Louisiana jurisdiction and through 2042 in the Arkansas and Texas jurisdictions.

Management is seeking or will seek regulatory recovery, as necessary, for any net book value remaining when the plants are retired. To the extent the net book value of these generation assets is not deemed recoverable, it could materially reduce future net income, cash flows and impact financial condition.

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RESULTS OF OPERATIONS

SEGMENTS

AEP’s primary business is the generation, transmission and distribution of electricity.  Within its Vertically Integrated Utilities segment, AEP centrally dispatches generation assets and manages its overall utility operations on an integrated basis because of the substantial impact of cost-based rates and regulatory oversight.  Intersegment sales and transfers are generally based on underlying contractual arrangements and agreements.

AEP’s reportable segments and their related business activities are outlined below:

Vertically Integrated Utilities

•Generation, transmission and distribution of electricity for sale to retail and wholesale customers through assets owned and operated by AEGCo, APCo, I&M, KGPCo, KPCo, PSO, SWEPCo and WPCo.

Transmission and Distribution Utilities

•Transmission and distribution of electricity for sale to retail and wholesale customers through assets owned and operated by AEP Texas and OPCo.

•OPCo purchases energy and capacity to serve standard service offer customers and provides transmission and distribution services for all connected load.

AEP Transmission Holdco

•Development, construction and operation of transmission facilities through investments in AEPTCo. These investments have FERC-approved ROEs.

•Development, construction and operation of transmission facilities through investments in AEP’s transmission-only joint ventures. These investments have PUCT-approved or FERC-approved ROEs.

Generation & Marketing

•Contracted energy management services.

•Marketing, risk management and retail activities in ERCOT, MISO, PJM and SPP.

•Competitive generation in PJM.

The remainder of AEP’s activities are presented as Corporate and Other. While not considered a reportable segment, Corporate and Other primarily includes the purchasing of receivables from certain AEP utility subsidiaries, Parent’s guarantee revenue received from affiliates, investment income, interest income and interest expense, and other nonallocated costs.

The following discussion of AEP’s results of operations by operating segment includes an analysis of Gross Margin, which is a non-GAAP financial measure. Gross Margin includes Total Revenues less the costs of Fuel and Other Consumables Used for Electric Generation, as well as Purchased Electricity for Resale, as presented in the Registrants’ statements of income as applicable. Under the various state utility rate making processes, these expenses are generally reimbursable directly from and billed to customers. As a result, they do not typically impact Operating Income or Earnings Attributable to AEP Common Shareholders. Management believes that Gross Margin provides a useful measure for investors and other financial statement users to analyze AEP’s financial performance in that it excludes the effect on Total Revenues caused by volatility in these expenses. Operating Income, which is presented in accordance with GAAP in AEP’s statements of income, is the most directly comparable GAAP financial measure to the presentation of Gross Margin. AEP’s definition of Gross Margin may not be directly comparable to similarly titled financial measures used by other companies.

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The following tables present Earnings (Loss) Attributable to AEP Common Shareholders by segment:

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2023		2022		2023		2022
	(in millions)
Vertically Integrated Utilities	$	512.5	$	476.9	$	1,051.6	$	1,076.3
Transmission and Distribution Utilities	206.0		165.5		508.4		483.1
AEP Transmission Holdco	202.9		170.5		580.8		485.4
Generation & Marketing	130.7		97.5		(59.3)		284.3
Corporate and Other	(98.4)		(226.7)		(209.6)		(406.2)
Earnings Attributable to AEP Common Shareholders	$	953.7	$	683.7	$	1,871.9	$	1,922.9

Three Months Ended September 30, 2023
	Vertically Integrated Utilities		Transmission and Distribution Utilities		AEP Transmission Holdco		Generation & Marketing
	(in millions)
Revenues	$	3,205.4	$	1,544.1	$	476.7	$	566.7
Fuel, Purchased Electricity and Other	1,137.5		298.8		—		406.6
Gross Margin	2,067.9		1,245.3		476.7		160.1
Other Operation and Maintenance	829.4		541.1		39.3		31.2
Depreciation and Amortization	480.7		206.9		101.9		8.3
Taxes Other Than Income Taxes	131.9		181.3		75.5		1.6
Operating Income	625.9		316.0		260.0		119.0
Other Income	5.9		0.6		2.1		11.5
Allowance for Equity Funds Used During Construction	15.0		13.4		22.7		—
Non-Service Cost Components of Net Periodic Benefit Cost	31.6		14.1		1.5		6.6
Interest Expense	(197.1)		(93.8)		(53.6)		(18.7)
Income Before Income Tax Expense (Benefit) and Equity Earnings (Loss)	481.3		250.3		232.7		118.4
Income Tax Expense (Benefit)	(32.4)		44.3		51.1		(16.2)
Equity Earnings (Loss) of Unconsolidated Subsidiary	0.3		—		22.3		(1.8)
Net Income	514.0		206.0		203.9		132.8
Net Income Attributable to Noncontrolling Interests	1.5		—		1.0		2.1
Earnings Attributable to AEP Common Shareholders	$	512.5	$	206.0	$	202.9	$	130.7

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Three Months Ended September 30, 2022
	Vertically Integrated Utilities		Transmission and Distribution Utilities		AEP Transmission Holdco		Generation & Marketing
	(in millions)
Revenues	$	3,226.3	$	1,530.2	$	430.9	$	735.4
Fuel, Purchased Electricity and Other	1,191.9		399.5		—		566.1
Gross Margin	2,034.4		1,130.7		430.9		169.3
Other Operation and Maintenance	834.0		503.6		46.5		44.7
Asset Impairments and Other Related Charges	24.9		—		—		—
Establishment of 2017-2019 Virginia Triennial Review Regulatory Asset	(37.0)		—		—		—
Depreciation and Amortization	520.6		188.3		89.5		23.1
Taxes Other Than Income Taxes	130.1		176.7		70.5		3.1
Operating Income	561.8		262.1		224.4		98.4
Other Income	9.0		1.4		0.7		12.5
Allowance for Equity Funds Used During Construction	6.0		9.3		20.3		—
Non-Service Cost Components of Net Periodic Benefit Cost	27.4		11.9		1.3		5.1
Interest Expense	(168.8)		(85.4)		(44.4)		(16.7)
Income Before Income Tax Expense (Benefit) and Equity Earnings (Loss)	435.4		199.3		202.3		99.3
Income Tax Expense (Benefit)	(41.2)		33.8		52.1		(5.1)
Equity Earnings (Loss) of Unconsolidated Subsidiary	0.3		—		21.2		(8.2)
Net Income	476.9		165.5		171.4		96.2
Net Income (Loss) Attributable to Noncontrolling Interests	—		—		0.9		(1.3)
Earnings Attributable to AEP Common Shareholders	$	476.9	$	165.5	$	170.5	$	97.5

Nine Months Ended September 30, 2023
	Vertically Integrated Utilities		Transmission and Distribution Utilities		AEP Transmission Holdco		Generation & Marketing
	(in millions)
Revenues	$	8,737.7	$	4,348.5	$	1,390.8	$	1,225.1
Fuel, Purchased Electricity and Other	2,989.0		970.5		—		1,116.0
Gross Margin	5,748.7		3,378.0		1,390.8		109.1
Other Operation and Maintenance	2,480.7		1,472.7		109.9		130.4
Loss on the Sale of the Competitive Contracted Renewables Portfolio	—		—		—		112.0
Depreciation and Amortization	1,411.3		576.2		297.9		34.7
Taxes Other Than Income Taxes	390.8		519.1		222.0		6.1
Operating Income (Loss)	1,465.9		810.0		761.0		(174.1)
Other Income	20.2		1.9		7.0		32.2
Allowance for Equity Funds Used During Construction	30.5		30.7		62.2		—
Non-Service Cost Components of Net Periodic Benefit Cost	94.9		42.1		4.6		19.7
Interest Expense	(565.1)		(270.0)		(153.7)		(69.2)
Income (Loss) Before Income Tax Expense (Benefit) and Equity Earnings	1,046.4		614.7		681.1		(191.4)
Income Tax Expense (Benefit)	(7.2)		106.3		158.7		(127.3)
Equity Earnings of Unconsolidated Subsidiary	1.0		—		61.2		1.9
Net Income (Loss)	1,054.6		508.4		583.6		(62.2)
Net Income (Loss) Attributable to Noncontrolling Interests	3.0		—		2.8		(2.9)
Earnings (Loss) Attributable to AEP Common Shareholders	$	1,051.6	$	508.4	$	580.8	$	(59.3)

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Nine Months Ended September 30, 2022
	Vertically Integrated Utilities		Transmission and Distribution Utilities		AEP Transmission Holdco		Generation & Marketing
	(in millions)
Revenues	$	8,562.2	$	4,078.6	$	1,221.1	$	2,014.3
Fuel, Purchased Electricity and Other	2,895.8		884.8		—		1,534.0
Gross Margin	5,666.4		3,193.8		1,221.1		480.3
Other Operation and Maintenance	2,383.1		1,373.2		114.4		71.2
Asset Impairments and Other Related Charges	24.9		—		—		—
Establishment of 2017-2019 Virginia Triennial Review Regulatory Asset	(37.0)		—		—		—
Gain on Sale of Mineral Rights	—		—		—		(116.3)
Depreciation and Amortization	1,525.0		559.5		262.7		68.8
Taxes Other Than Income Taxes	383.9		504.9		207.9		9.3
Operating Income	1,386.5		756.2		636.1		447.3
Other Income	24.9		3.7		1.1		21.4
Allowance for Equity Funds Used During Construction	20.4		23.6		51.2		—
Non-Service Cost Components of Net Periodic Benefit Cost	82.4		35.7		3.8		15.4
Interest Expense	(477.1)		(242.2)		(124.2)		(30.7)
Income Before Income Tax Expense (Benefit) and Equity Earnings (Loss)	1,037.1		577.0		568.0		453.4
Income Tax Expense (Benefit)	(41.3)		94.7		141.9		(25.3)
Equity Earnings (Loss) of Unconsolidated Subsidiary	1.0		0.8		61.7		(200.6)
Net Income	1,079.4		483.1		487.8		278.1
Net Income (Loss) Attributable to Noncontrolling Interests	3.1		—		2.4		(6.2)
Earnings Attributable to AEP Common Shareholders	$	1,076.3	$	483.1	$	485.4	$	284.3

23

VERTICALLY INTEGRATED UTILITIES

Summary of KWh Energy Sales for Vertically Integrated Utilities

	Three Months Ended		Nine Months Ended
	September 30,		September 30,
	2023	2022	2023	2022
	(in millions of KWhs)
Retail:
Residential	8,975	9,115	23,406	25,379
Commercial	6,686	6,640	17,781	18,069
Industrial	8,731	8,862	25,686	25,930
Miscellaneous	618	623	1,684	1,745
Total Retail	25,010	25,240	68,557	71,123
Wholesale (a)	3,876	4,254	10,620	12,388
Total KWhs	28,886	29,494	79,177	83,511

(a)Includes Off-system Sales, municipalities and cooperatives, unit power and other wholesale customers.

Heating degree days and cooling degree days are metrics commonly used in the utility industry as a measure of the impact of weather on revenues.  In general, degree day changes in the eastern region have a larger effect on revenues than changes in the western region due to the relative size of the two regions and the number of customers within each region.

Summary of Heating and Cooling Degree Days for Vertically Integrated Utilities

	Three Months Ended		Nine Months Ended
	September 30,		September 30,
	2023	2022	2023	2022
	(in degree days)
Eastern Region
Actual – Heating (a)	—	8	1,253	1,750
Normal – Heating (b)	3	4	1,750	1,748
Actual – Cooling (c)	748	783	967	1,178
Normal – Cooling (b)	751	745	1,095	1,082
Western Region
Actual – Heating (a)	—	—	657	930
Normal – Heating (b)	—	—	916	906
Actual – Cooling (c)	1,634	1,653	2,436	2,558
Normal – Cooling (b)	1,430	1,413	2,162	2,134

(a)Heating degree days are calculated on a 55 degree temperature base.

(b)Normal Heating/Cooling represents the thirty-year average of degree days.

(c)Cooling degree days are calculated on a 65 degree temperature base.

24

Vertically Integrated Utilities
Reconciliation of 2022 to 2023 Earnings Attributable to AEP Common Shareholders
(in millions)
	Three Months Ended  September 30,		Nine Months Ended  September 30,
2022 Earnings Attributable to AEP Common Shareholders	$	476.9	$	1,076.3
Changes in Gross Margin:
Retail Margins	52.2		68.6
Margins from Off-system Sales	(14.4)		32.8
Transmission Revenues	(5.5)		(11.6)
Other Revenues	1.2		(7.5)
Total Change in Gross Margin	33.5		82.3
Changes in Expenses and Other:
Other Operation and Maintenance	4.6		(97.6)
Asset Impairments and Other Related Charges	24.9		24.9
Establishment of 2017-2019 Virginia Triennial Review Regulatory Asset	(37.0)		(37.0)
Depreciation and Amortization	39.9		113.7
Taxes Other Than Income Taxes	(1.8)		(6.9)
Other Income	(3.1)		(4.7)
Allowance for Equity Funds Used During Construction	9.0		10.1
Non-Service Cost Components of Net Periodic Pension Cost	4.2		12.5
Interest Expense	(28.3)		(88.0)
Total Change in Expenses and Other	12.4		(73.0)
Income Tax Benefit	(8.8)		(34.1)
Net Income Attributable to Noncontrolling Interests	(1.5)		0.1
2023 Earnings Attributable to AEP Common Shareholders	$	512.5	$	1,051.6

Third Quarter of 2023 Compared to Third Quarter of 2022

The major components of the increase in Gross Margin, defined as revenues less the related direct cost of fuel, including consumption of chemicals and emissions allowances, and purchased electricity were as follows:

•Retail Margins increased $52 million primarily due to the following:

•A $28 million increase in base rate and rider revenues at PSO. This increase was partially offset in other expense items below.

•A $23 million increase at SWEPCo due to a base rate revenue increase in Louisiana and rider increases in Texas and Louisiana. These increases were partially offset in other expense items below.

•A $20 million increase in weather-normalized retail margins primarily in the commercial and industrial classes.

•A $19 million increase at APCo due to rider revenues in Virginia and West Virginia. This increase was partially offset in other expense items below.

25

These increases were partially offset by:

•An $18 million decrease at PSO and SWEPCo due to an increase in PTC benefits provided to customers. This increase in PTC benefits was offset in Income Tax Benefit below.

•A $13 million decrease in weather-related usage primarily in the residential class.

•Margins from Off-system Sales decreased $14 million primarily due to reduced Turk Plant merchant sales and Rockport Plant, Unit 2 merchant operations activity.

•Transmission Revenues decreased $6 million primarily due to transmission formula rate true-up activity.

Expenses and Other and Income Tax Benefit changed between years as follows:

•Asset Impairments and Other Related Charges decreased $25 million at APCo due to the prior year write-off of a regulatory asset in accordance with the August 2022 Virginia Supreme Court opinion related to the 2017-2019 Virginia Triennial Review.

•Establishment of 2017-2019 Virginia Triennial Review Regulatory Asset decreased $37 million at APCo due to the establishment of a regulatory asset in 2022 based on an August 2022 Virginia Supreme Court opinion and resulting under-earning during the 2017-2019 Virginia Triennial Review.

•Depreciation and Amortization expenses decreased $40 million primarily due to a $46 million decrease at AEGCo and I&M due to the expiration of the Rockport Plant, Unit 2 lease in December 2022, partially offset by an increase in depreciation expense due to the acquisition of Rockport Plant, Unit 2 at the end of the lease.

•Allowance for Equity Funds Used During Construction increased $9 million primarily due to higher AFUDC equity rates and CWIP.

•Interest Expense increased $28 million primarily due to higher long-term debt balances and interest rates.

•Income Tax Benefit decreased $9 million primarily due to the following:

•A $10 million decrease due to an increase in pretax book income.

•A $10 million increase in state income tax.

•A $3 million decrease in amortization of Excess ADIT. This decrease was partially offset in Retail Margins above.

•A $3 million decrease due to a lower cost of removal deduction.

These decreases were partially offset by:

•An $18 million increase in PTCs. This increase was partially offset in Retail Margins above.

Nine Months Ended September 30, 2023 Compared to Nine Months Ended September 30, 2022

The major components of the increase in Gross Margin, defined as revenues less the related direct cost of fuel, including consumption of chemicals and emissions allowances, and purchased electricity were as follows:

•Retail Margins increased $69 million primarily due to the following:

•A $58 million increase at SWEPCo primarily due to base rate revenue increases in Arkansas and Louisiana and rider increases in all retail jurisdictions. These increases were partially offset in other expense items below.

•A $54 million increase in weather-normalized margins primarily in the residential and commercial classes.

•A $47 million increase in base rate and rider revenues at PSO. This increase was partially offset in other expense items below.

•A $44 million increase at APCo due to rider revenues in Virginia and West Virginia. This increase was partially offset in other expense items below.

•A $40 million increase due to lower customer refunds related to Tax Reform. This increase was offset in Income Tax Benefit below.

These increases were partially offset by:

•A $151 million decrease in weather-related usage primarily in the residential class.

•A $26 million decrease at PSO and SWEPCo due to an increase in PTC benefits provided to customers. This increase in PTC benefits was offset in Income Tax Benefit below.

•Margins from Off-system Sales increased $33 million primarily due to Rockport Plant, Unit 2 merchant operations including PJM performance incentives related to winter storm Elliott in December 2022, partially offset by reduced Turk Plant merchant sales.

•Transmission Revenues decreased $12 million primarily due to transmission formula rate true-up activity.

26

•Other Revenues decreased $8 million primarily due to the following:

•A $4 million decrease at APCo primarily due to pole attachment revenue.

•A $4 million decrease at I&M due to a reduction in the sale of allowances. This decrease was partially offset in Retail Margins above.

Expenses and Other and Income Tax Benefit changed between years as follows:

•Other Operation and Maintenance expenses increased $98 million primarily due to the following:

•A $30 million increase in generation expenses primarily due to plant outages and maintenance at I&M.

•A $29 million increase in accounts receivable factoring expenses primarily due to increased interest rates.

•A $27 million increase in distribution storm expenses primarily due to major storms at APCo.

•A $21 million increase at APCo due to the amortization of a regulatory asset in accordance with the August 2022 Virginia Supreme Court opinion related to under-earnings during the 2017-2019 Triennial Review. This increase was offset in Retail Margins above.

•A $14 million increase at APCo due to gains from the sale of land in 2022.

•An $11 million increase in distribution expenses.

These increases were partially offset by:

•A $43 million decrease in employee-related expenses.

•Asset Impairments and Other Related Charges decreased $25 million at APCo due to the prior year write-off of a regulatory asset in accordance with the August 2022 Virginia Supreme Court opinion related to the 2017-2019 Virginia Triennial Review.

•Establishment of 2017-2019 Virginia Triennial Review Regulatory Asset decreased $37 million at APCo due to the establishment of a regulatory asset in 2022 based on an August 2022 Virginia Supreme Court opinion and resulting under-earning during the 2017-2019 Virginia Triennial Review.

•Depreciation and Amortization expenses decreased $114 million primarily due to a $138 million decrease at AEGCo and I&M primarily due to the expiration of the Rockport Plant, Unit 2 lease in December 2022, partially offset by an increase in depreciation expense due to the acquisition of Rockport Plant, Unit 2 at the end of the lease.

•Taxes Other Than Income Taxes increased $7 million primarily due to the following:

•A $16 million increase primarily due to property taxes at SWEPCo and PSO driven by the investment in the NCWF.

•A $6 million increase at APCo primarily due to an increase in Virginia state minimum taxes.

These increases were partially offset by:

•A $14 million decrease at I&M primarily due to the repeal of the Indiana Utility Receipts Tax in July 2022. This decrease was partially offset in Retail Margins above.

•Allowance for Equity Funds Used During Construction increased $10 million primarily due to higher AFUDC equity rates and CWIP.

•Non-Service Cost Components of Net Periodic Benefit Cost decreased $13 million primarily due to additional loss amortization as the result of unfavorable asset returns during 2022, higher interest costs due to higher discount rates and the expiration of prior service credits from previous plan changes.

•Interest Expense increased $88 million primarily due to higher long-term debt balances and interest rates.

•Income Tax Benefit decreased $34 million primarily due to the following:

•A $38 million decrease in amortization of Excess ADIT. This decrease was partially offset in Retail Margins above.

•A $12 million increase in state income tax.

•An $11 million decrease due to unfavorable discrete adjustments.

These decreases were partially offset by:

•A $27 million increase in PTC and ITC amortization. This increase was partially offset in Retail Margins above.

27

TRANSMISSION AND DISTRIBUTION UTILITIES

Summary of KWh Energy Sales for Transmission and Distribution Utilities

	Three Months Ended		Nine Months Ended
	September 30,		September 30,
	2023	2022	2023	2022
	(in millions of KWhs)
Retail:
Residential	8,442	8,033	20,618	21,599
Commercial	8,574	7,538	22,711	20,478
Industrial	6,601	6,554	19,800	19,131
Miscellaneous	220	210	565	578
Total Retail (a)	23,837	22,335	63,694	61,786
Wholesale (b)	485	587	1,366	1,723
Total KWhs	24,322	22,922	65,060	63,509

(a)Represents energy delivered to distribution customers.

(b)Primarily Ohio’s contractually obligated purchases of OVEC power sold to PJM.

Heating degree days and cooling degree days are metrics commonly used in the utility industry as a measure of the impact of weather on revenues.  In general, degree day changes in the eastern region have a larger effect on revenues than changes in the western region due to the relative size of the two regions and the number of customers within each region.

Summary of Heating and Cooling Degree Days for Transmission and Distribution Utilities

	Three Months Ended		Nine Months Ended
	September 30,		September 30,
	2023	2022	2023	2022
	(in degree days)
Eastern Region
Actual – Heating (a)	—	8	1,521	2,078
Normal – Heating (b)	4	5	2,080	2,077
Actual – Cooling (c)	625	755	809	1,115
Normal – Cooling (b)	697	688	1,005	989
Western Region
Actual – Heating (a)	—	—	143	278
Normal – Heating (b)	—	—	197	193
Actual – Cooling (d)	1,719	1,478	2,945	2,701
Normal – Cooling (b)	1,387	1,382	2,454	2,433

(a)Heating degree days are calculated on a 55 degree temperature base.

(b)Normal Heating/Cooling represents the thirty-year average of degree days.

(c)Eastern Region cooling degree days are calculated on a 65 degree temperature base.

(d)Western Region cooling degree days are calculated on a 70 degree temperature base.

28

Transmission and Distribution Utilities
Reconciliation of 2022 to 2023 Earnings Attributable to AEP Common Shareholders
(in millions)
	Three Months Ended  September 30,		Nine Months Ended  September 30,
2022 Earnings Attributable to AEP Common Shareholders	$	165.5	$	483.1
Changes in Gross Margin:
Retail Margins	99.3		98.1
Margins from Off-system Sales	(5.5)		35.9
Transmission Revenues	16.7		50.3
Other Revenues	4.1		(0.1)
Total Change in Gross Margin	114.6		184.2
Changes in Expenses and Other:
Other Operation and Maintenance	(37.5)		(99.5)
Depreciation and Amortization	(18.6)		(16.7)
Taxes Other Than Income Taxes	(4.6)		(14.2)
Other Income	(0.8)		(1.8)
Allowance for Equity Funds Used During Construction	4.1		7.1
Non-Service Cost Components of Net Periodic Benefit Cost	2.2		6.4
Interest Expense	(8.4)		(27.8)
Total Change in Expenses and Other	(63.6)		(146.5)
Income Tax Expense	(10.5)		(11.6)
Equity Earnings of Unconsolidated Subsidiary	—		(0.8)
2023 Earnings Attributable to AEP Common Shareholders	$	206.0	$	508.4

Third Quarter of 2023 Compared to Third Quarter of 2022

The major components of the change in Gross Margin, defined as revenues less the related direct cost of purchased electricity were as follows:

•Retail Margins increased $99 million primarily due to the following:

•A $43 million increase in revenue from rate riders in Ohio. This increase was partially offset in Margins from Off-system Sales and other expense items below.

•A $24 million increase in weather-normalized revenues in all retail classes.

•A $23 million net increase in Basic Transmission Cost Rider revenues and recoverable PJM expenses. This increase was partially offset in Other Operation and Maintenance expenses below.

•A $7 million increase in revenue from rate riders in Texas. This increase was partially offset in other expense items below.

•Margins from Off-system Sales decreased $6 million due to the following:

•A $32 million decrease in off-system sales at OVEC due to lower market prices and volume. This decrease was offset in Retail Margins above.

This decrease was partially offset by:

•A $26 million increase in deferrals of OVEC costs. This increase was offset in Retail Margins above.

•Transmission Revenues increased $17 million primarily due to the following:

•An $8 million increase due to increased load in Texas.

•A $6 million increase in interim rates driven by increased transmission investments in Texas.

29

Expenses and Other and Income Tax Expense changed between years as follows:

•Other Operation and Maintenance expenses increased $38 million primarily due to the following:

•A $20 million increase due to an energy assistance program for qualified Ohio customers. This increase was offset in Retail Margins above.

•A $19 million increase in transmission expenses primarily due to an increase in recoverable PJM expense. This increase was offset in Retail Margins above.

•A $7 million increase in distribution expenses primarily due to vegetation management in Ohio. This increase was offset in Retail Margins above.

These increases were partially offset by:

•A $7 million decrease due to employee-related expenses in Texas.

•Depreciation and Amortization expenses increased $19 million primarily due to the following:

•A $25 million increase in depreciation expense primarily due to an increase in depreciable base.

This increase was partially offset by:

•A $9 million decrease in recoverable DIR expense in Ohio. This decrease was offset in Retail Margins above.

•Interest Expense increased $8 million primarily due to higher long-term debt balances and interest rates in Texas.

•Income Tax Expense increased $11 million primarily due to an increase in pretax book income.

Nine Months Ended September 30, 2023 Compared to Nine Months Ended September 30, 2022

The major components of the change in Gross Margin, defined as revenues less the related direct cost of purchased electricity were as follows:

•Retail Margins increased $98 million primarily due to the following:

•An $86 million increase in revenue from rate riders in Ohio. This increase was partially offset in Margins from Off-system Sales and other expense items below.

•A $57 million net increase in Basic Transmission Cost Rider revenues and recoverable PJM expenses. This increase was partially offset in Other Operation and Maintenance expenses below.

These increases were partially offset by:

•A $47 million decrease in weather-related usage due to a 27% decrease in heating degree days and a 28% decrease in cooling degree days in Ohio.

•A $9 million decrease in weather-normalized revenues primarily due to the residential class in Texas.

•Margins from Off-system Sales increased $36 million due to the following:

•A $111 million increase in deferrals of OVEC costs. This increase was offset in Retail Margins above.

This increase was partially offset by:

•A $75 million decrease in off-system sales at OVEC due to lower market prices and volume. This decrease was offset in Retail Margins above.

•Transmission Revenues increased $50 million primarily due to the following:

•A $24 million increase in interim rates driven by increased transmission investments in Texas.

•A $22 million increase due to increased load in Texas.

Expenses and Other and Income Tax Expense changed between years as follows:

•Other Operation and Maintenance expenses increased $100 million primarily due to the following:

•A $68 million increase due to an energy assistance program for qualified Ohio customers. This increase was offset in Retail Margins above.

•A $41 million increase in transmission expenses primarily due to:

•A $33 million increase in recoverable PJM expenses. This increase was offset in Retail Margins above.

•An $11 million increase in transmission formula rate true-up activity in Ohio.

•A $15 million increase in distribution expenses due to vegetation management in Ohio. This increase was offset in Retail Margins above.

30

•A $14 million increase in distribution-related expenses in Texas.

These increases were partially offset by:

•A $30 million decrease due to legislation passed in Texas in May 2023 allowing employee financially based incentives to be recovered.

•A $24 million decrease in employee-related expenses.

•A $5 million decrease in transmission expenses in Texas. This decrease was offset in Retail Margins above.

•Depreciation and Amortization expenses increased $17 million primarily due to the following:

•A $50 million increase in depreciation expense primarily due to an increase in depreciable base.

•A $5 million increase in recoverable smart grid depreciable expenses in Ohio. This increase was offset in Retail Margins above.

These increases were partially offset by:

•A $30 million decrease in recoverable DIR expense in Ohio. This decrease was offset in Retail Margins above.

•An $11 million decrease in recoverable advanced metering system depreciable expenses in Texas.

•Taxes Other Than Income Taxes increased $14 million primarily due to higher property taxes driven by increased investments in Texas.

•Allowance for Equity Funds Used During Construction increased $7 million due to a higher AFUDC base in Texas.

•Interest Expense increased $28 million primarily due to:

•A $48 million increase primarily due to higher debt balances and interest rates.

This increase was partially offset by:

•A $16 million decrease due to an increase in AFUDC base.

•Income Tax Expense increased $12 million primarily due to an increase in pretax book income.

31

AEP TRANSMISSION HOLDCO

Summary of Investment in Transmission Assets for AEP Transmission Holdco

	September 30,
	2023		2022
	(in millions)
Plant in Service	$	14,042.9	$	12,628.6
Construction Work in Progress	2,037.0		1,760.3
Accumulated Depreciation and Amortization	1,261.2		1,000.3
Total Transmission Property, Net	$	14,818.7	$	13,388.6

AEP Transmission Holdco
Reconciliation of 2022 to 2023 Earnings Attributable to AEP Common Shareholders
(in millions)
	Three Months Ended  September 30,		Nine Months Ended  September 30,
2022 Earnings Attributable to AEP Common Shareholders	$	170.5	$	485.4
Changes in Transmission Revenues:
Transmission Revenues	45.8		169.7
Total Change in Transmission Revenues	45.8		169.7
Changes in Expenses and Other:
Other Operation and Maintenance	7.2		4.5
Depreciation and Amortization	(12.4)		(35.2)
Taxes Other Than Income Taxes	(5.0)		(14.1)
Interest and Investment Income	1.4		5.9
Allowance for Equity Funds Used During Construction	2.4		11.0
Non-Service Cost Components of Net Periodic Pension Cost	0.2		0.8
Interest Expense	(9.2)		(29.5)
Total Change in Expenses and Other	(15.4)		(56.6)
Income Tax Expense	1.0		(16.8)
Equity Earnings of Unconsolidated Subsidiary	1.1		(0.5)
Net Income Attributable to Noncontrolling Interests	(0.1)		(0.4)
2023 Earnings Attributable to AEP Common Shareholders	$	202.9	$	580.8

Third Quarter of 2023 Compared to Third Quarter of 2022

The major component of the increase in transmission revenues, which consists of wholesale sales to affiliates and nonaffiliates, was as follows:

•Transmission Revenues increased $46 million primarily due to continued investment in transmission assets.

Expenses and Other changed between years as follows:

•Other Operation and Maintenance expenses decreased $7 million primarily due to the following:

•A $5 million decrease due to cancelled capital projects in 2022.

•A $3 million decrease in employee-related expenses.

32

•Depreciation and Amortization expenses increased $12 million primarily due to a higher depreciable base.

•Taxes Other Than Income Taxes increased $5 million primarily due to higher property taxes driven by increased transmission investment.

•Interest Expense increased $9 million primarily due to higher long-term debt balances and interest rates.

Nine Months Ended September 30, 2023 Compared to Nine Months Ended September 30, 2022

The major components of the increase in transmission revenues, which consists of wholesale sales to affiliates and nonaffiliates, were as follows:

•Transmission Revenues increased $170 million primarily due to the following:

•A $131 million increase due to continued investment in transmission assets.

•A $33 million increase due to affiliated transmission formula rate true-up activity. This increase was offset in Other Operation and Maintenance expenses across the other Registrant Subsidiaries.

•A $6 million increase due to nonaffiliated transmission formula rate true-up activity.

Expenses and Other and Income Tax Expense changed between years as follows:

•Depreciation and Amortization expenses increased $35 million primarily due to a higher depreciable base.

•Taxes Other Than Income Taxes increased $14 million primarily due to higher property taxes driven by increased transmission investment.

•Interest and Investment Income increased $6 million primarily due to higher advances to affiliates and higher interest rates.

•Allowance for Equity Funds Used During Construction increased $11 million primarily due to higher CWIP and AFUDC equity rates.

•Interest Expense increased $30 million primarily due to higher long-term debt balances and interest rates.

•Income Tax Expense increased $17 million primarily due to an increase in pretax book income.

33

GENERATION & MARKETING

Generation & Marketing
Reconciliation of 2022 to 2023 Earnings (Loss) Attributable to AEP Common Shareholders
(in millions)
	Three Months Ended  September 30,		Nine Months Ended  September 30,
2022 Earnings Attributable to AEP Common Shareholders	$	97.5	$	284.3
Changes in Gross Margin:
Merchant Generation	12.5		7.9
Renewable Generation	(26.3)		(34.8)
Retail, Trading and Marketing	4.6		(344.3)
Total Change in Gross Margin	(9.2)		(371.2)
Changes in Expenses and Other:
Other Operation and Maintenance	13.5		(59.2)
Loss on the Sale of the Competitive Contracted Renewables Portfolio	—		(112.0)
Gain on Sale of Mineral Rights	—		(116.3)
Depreciation and Amortization	14.8		34.1
Taxes Other Than Income Taxes	1.5		3.2
Interest and Investment Income	(1.0)		10.8
Non-Service Cost Components of Net Periodic Benefit Cost	1.5		4.3
Interest Expense	(2.0)		(38.5)
Total Change in Expenses and Other	28.3		(273.6)
Income Tax Benefit	11.1		102.0
Equity Earnings of Unconsolidated Subsidiaries	6.4		202.5
Net Loss Attributable to Noncontrolling Interests	(3.4)		(3.3)
2023 Earnings (Loss) Attributable to AEP Common Shareholders	$	130.7	$	(59.3)

Third Quarter of 2023 Compared to Third Quarter of 2022

The major components of the decrease in Gross Margin, defined as revenues less the related direct cost of fuel, including consumption of chemicals and emissions allowances, purchased electricity and certain cost of service for retail operations were as follows:

•Merchant Generation increased $13 million primarily due to higher hedge gains related to the Cardinal Plant.

•Renewable Generation decreased $26 million primarily due to lower production in 2023 and the sale of the competitive contracted renewables portfolio in August 2023.

Expenses and Other, Income Tax Benefit and Equity Earnings of Unconsolidated Subsidiaries changed between years as follows:

•Other Operation and Maintenance expenses decreased $14 million primarily due to:

•A $7 million decrease due to the sale of the competitive contracted renewables portfolio in August 2023.

•A $5 million decrease due to an increase in proceeds received for insurance policy settlements.

34

•Depreciation and Amortization decreased $15 million primarily due to the ceasing of depreciation on the competitive contracted renewables portfolio as a result of held for sale classification and subsequent sale in 2023.

•Income Tax Benefit increased $11 million primarily due to:

•A $30 million increase due to favorable discrete adjustments primarily related to the amortization of deferred ITCs from the sale of competitive contracted renewables portfolio.

This increase was partially offset by:

•An $11 million decrease in PTCs.

•A $5 million decrease due to an increase in pretax book income.

•A $3 million increase in state taxes.

•Equity Earnings of Unconsolidated Subsidiaries increased $6 million primarily due to the sale of competitive contracted renewables portfolio in August 2023.

Nine Months Ended September 30, 2023 Compared to Nine Months Ended September 30, 2022

The major components of the decrease in Gross Margin, defined as revenues less the related direct cost of fuel, including consumption of chemicals and emissions allowances, purchased electricity and certain cost of service for retail operations were as follows:

•Merchant Generation increased $8 million primarily due to higher asset hedge gains.

•Renewable Generation decreased $35 million primarily due to lower production in 2023 and the sale of competitive contracted renewables portfolio in August 2023.

•Retail, Trading and Marketing decreased $344 million primarily due to a $222 million unrealized loss on economic hedge activity in 2023 and a $208 million unrealized gain on economic hedge activity in 2022 driven by changes in commodity prices.

Expenses and Other, Income Tax Benefit and Equity Earnings of Unconsolidated Subsidiaries changed between years as follows:

•Other Operation and Maintenance expenses increased $59 million primarily due to a decrease in land sales and a prior year sale of renewable development projects.

•Loss on the Sale of the Competitive Contracted Renewables Portfolio increased $112 million due to the pretax loss on the sale in 2023.

•Gain on Sale of Mineral Rights decreased $116 million due to the prior year sale of mineral rights.

•Depreciation and Amortization expenses decreased $34 million primarily due to the ceasing of depreciation on the competitive contracted renewables portfolio as a result of held for sale classification and subsequent sale in 2023.

•Interest and Investment Income increased $11 million primarily due to higher interest rates on advances to affiliates.

•Interest Expense increased $39 million due to higher interest rates in 2023.

•Income Tax Benefit increased $102 million primarily due to:

•A $94 million increase due to a decrease in pretax book income.

•A $35 million increase due to favorable discrete adjustments primarily related to the amortization of deferred ITCs from the sale of competitive contracted renewables portfolio.

These increases were partially offset by:

•A $26 million decrease in PTCs.

•Equity Earnings of Unconsolidated Subsidiaries increased $203 million primarily due to the prior year impairment of AEP’s investment in Flat Ridge 2 Wind LLC.

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CORPORATE AND OTHER

Third Quarter of 2023 Compared to Third Quarter of 2022

Earnings Attributable to AEP Common Shareholders from Corporate and Other increased from a loss of $227 million in 2022 to a loss of $98 million in 2023 primarily due to:

•A $195 million pretax loss in 2022 related to the termination of the sale of the Kentucky Operations.

•A $21 million increase in interest income, primarily due to higher interest income from affiliates.

•An $18 million decrease in corporate expenses.

•A $17 million increase in business development income.

•A $10 million increase at EIS, primarily due to higher returns on investments.

These increases in earnings were partially offset by:

•A $73 million increase in Income Tax Expense primarily due to a $42 million increase driven by increased pretax book income and a $30 million increase due to less favorable consolidating tax adjustments.

•A $72 million increase in interest expense due to higher interest rates and an increase in debt balances.

Nine Months Ended September 30, 2023 Compared to Nine Months Ended September 30, 2022

Earnings Attributable to AEP Common Shareholders from Corporate and Other increased from a loss of $406 million in 2022 to a loss of $210 million in 2023 primarily due to:

•A $263 million pretax loss in 2022 related to the termination of the sale of the Kentucky Operations.

•A $96 million increase in interest income, primarily due to higher interest income from affiliates.

•A $54 million decrease in corporate expenses, primarily due to adjustments driven by the termination of the sale of Kentucky Operations.

•A $42 million increase in factoring revenues from affiliates.

•A $38 million increase at EIS, primarily due to higher returns on investments.

These increases in were partially offset by:

•A $259 million increase in interest expense due to higher interest rates and an increase in debt balances.

•A $52 million decrease in Income Tax Benefit primarily due to an increase in pretax book income.

AEP SYSTEM INCOME TAXES

Third Quarter of 2023 Compared to Third Quarter of 2022

Income Tax Expense increased $80 million primarily due to:

•A $75 million increase due to an increase in pretax book income.

•A $23 million decrease in PTCs.

•A $20 million increase in state taxes.

These increases in Income Tax Expense were partially offset by:

•A $41 million decrease due to discrete adjustments in 2023 primarily related to the amortization of deferred ITCs from the sale of the competitive contracted renewables portfolio.

Nine Months Ended September 30, 2023 Compared to Nine Months Ended September 30, 2022

Income Tax Expense increased $12 million primarily due to:

•A $38 million decrease in amortization of Excess ADIT.

•A $20 million decrease in PTCs.

•A $20 million increase in state taxes.

These increases in Income Tax Expense were partially offset by:

•A $51 million decrease due to discrete adjustments in 2023 primarily related to the amortization of deferred ITCs from the sale of the competitive contracted renewables portfolio and an outside basis adjustment related to the termination of the sale of the Kentucky Operations.

•A $16 million decrease in flow-through depreciation.

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FINANCIAL CONDITION

AEP measures financial condition by the strength of its balance sheet and the liquidity provided by its cash flows.

LIQUIDITY AND CAPITAL RESOURCES

Debt and Equity Capitalization

	September 30, 2023				December 31, 2022
	(dollars in millions)
Long-term Debt, including amounts due within one year	$	39,489.1	58.4	%	$	36,801.0	56.6	%
Short-term Debt	2,730.4		4.0		4,112.2		6.3
Total Debt	42,219.5		62.4		40,913.2		62.9
AEP Common Equity	25,309.7		37.5		23,893.4		36.7
Noncontrolling Interests	39.9		0.1		229.0		0.4
Total Debt and Equity Capitalization	$	67,569.1	100.0	%	$	65,035.6	100.0	%

AEP’s ratio of debt-to-total capital decreased from 62.9% as of December 31, 2022 to 62.4% as of September 30, 2023 primarily due to the issuance of common equity in connection with the settlement of the forward equity purchase contracts related to the 2020 Equity Units in addition to the utilization of cash proceeds received from the sale of the competitive contracted renewables portfolio which were used to reduce Short-term Debt, partially offset by an increase in Long-term Debt to support distribution, transmission and renewable investment growth in addition to working capital needs.

Liquidity

Liquidity, or access to cash, is an important factor in determining AEP’s financial stability.  Management believes AEP has adequate liquidity.  As of September 30, 2023, AEP had $5 billion of revolving credit facilities to support its commercial paper program.  Additional liquidity is available from cash from operations and a receivables securitization agreement.  Management is committed to maintaining adequate liquidity.  AEP generally uses short-term borrowings to fund working capital needs, property acquisitions and construction until long-term funding is arranged.  Sources of long-term funding include issuance of long-term debt, long-term asset securitizations, leasing agreements, hybrid securities or common stock. AEP and its utilities finance its operations with commercial paper and other variable rate instruments that are subject to fluctuations in interest rates. To the extent that the interest rates continue to rise, it could reduce future net income and cash flows and impact financial condition. Market volatility and reduced liquidity in the financial markets could affect AEP’s ability to raise capital on reasonable terms to fund capital needs, including construction costs and refinancing maturing indebtedness. AEP is also monitoring the current bank environment and any impacts thereof. AEP was not materially impacted by these conditions during the nine months ended September 30, 2023. AEP continues to address the cash flow implications of increased fuel and purchased power costs, see “Deferred Fuel Costs” section of Executive Overview for additional information.

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Net Available Liquidity

AEP manages liquidity by maintaining adequate external financing commitments.  As of September 30, 2023, available liquidity was approximately $3.5 billion as illustrated in the table below:

		Amount		Maturity
Commercial Paper Backup:		(in millions)
	Revolving Credit Facility	$	4,000.0	March 2027
	Revolving Credit Facility	1,000.0		March 2025
Cash and Cash Equivalents		353.3
Total Liquidity Sources		5,353.3
Less:	AEP Commercial Paper Outstanding	1,826.5
Net Available Liquidity		$	3,526.8

AEP uses its commercial paper program to meet the short-term borrowing needs of its subsidiaries.  The program funds a Utility Money Pool, which funds AEP’s utility subsidiaries; a Nonutility Money Pool, which funds certain AEP nonutility subsidiaries; and the short-term debt requirements of subsidiaries that are not participating in either money pool for regulatory or operational reasons, as direct borrowers.  The maximum amount of commercial paper outstanding during the first nine months of 2023 was $3.2 billion.  The weighted-average interest rate for AEP’s commercial paper during 2023 was 5.31%.

Other Credit Facilities

An uncommitted facility gives the issuer of the facility the right to accept or decline each request made under the facility. AEP issues letters of credit on behalf of subsidiaries under six uncommitted facilities totaling $450 million. The Registrants’ maximum future payments for letters of credit issued under the uncommitted facilities as of September 30, 2023 was $249 million with maturities ranging from October 2023 to September 2024.

Securitized Accounts Receivables

AEP Credit’s receivables securitization agreement provides a commitment of $900 million from bank conduits to purchase receivables. The agreement was amended in August 2023 to increase the commitment from $750 million and expires in September 2025. As of September 30, 2023, the affiliated utility subsidiaries were in compliance with all requirements under the agreement.

Debt Covenants and Borrowing Limitations

AEP’s credit agreements contain certain covenants and require it to maintain a percentage of debt-to-total capitalization at a level that does not exceed 67.5%.  The method for calculating outstanding debt and capitalization is contractually-defined in AEP’s credit agreements.  Debt as defined in the revolving credit agreement excludes securitization bonds and debt of AEP Credit. As of September 30, 2023, this contractually-defined percentage was 59.4%. Non-performance under these covenants could result in an event of default under these credit agreements.  In addition, the acceleration of AEP’s payment obligations, or the obligations of certain of AEP’s major subsidiaries, prior to maturity under any other agreement or instrument relating to debt outstanding in excess of $50 million, would cause an event of default under these credit agreements.  This condition also applies in a majority of AEP’s non-exchange-traded commodity contracts and would similarly allow lenders and counterparties to declare the outstanding amounts payable.  However, a default under AEP’s non-exchange-traded commodity contracts would not cause an event of default under its credit agreements.

The revolving credit facilities do not permit the lenders to refuse a draw on any facility if a material adverse change occurs.

Utility Money Pool borrowings and external borrowings may not exceed amounts authorized by regulatory orders and AEP manages its borrowings to stay within those authorized limits.

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ATM Program

AEP participates in an ATM offering program that allows AEP to issue, from time to time, up to an aggregate of $1 billion of its common stock, including shares of common stock that may be sold pursuant to an equity forward sales agreement. There were no issuances under the ATM program for the nine months ended September 30, 2023. As of September 30, 2023, approximately $511 million of equity is available for issuance under the ATM offering program. See Note 12 - Financing Activities for additional information.

Equity Units

In August 2020, AEP issued 17 million Equity Units initially in the form of corporate units, at a stated amount of $50 per unit, for a total stated amount of $850 million. Net proceeds from the issuance were approximately $833 million. Each corporate unit represents a 1/20 undivided beneficial ownership interest in $1,000 principal amount of AEP’s 1.30% Junior Subordinated Notes due in 2025 and a forward equity purchase contract which settled after three years in August 2023. The proceeds were used to support AEP’s overall capital expenditure plans.

In June 2023, AEP successfully remarketed the Junior Subordinated Notes on behalf of holders of the corporate units. AEP did not receive any proceeds from the remarketing which were used to purchase a portfolio of treasury securities that matured on August 14, 2023. On August 15, 2023, the proceeds from the treasury portfolio were used to settle the forward equity purchase contract with AEP. The interest rate on the Junior Subordinated Notes was reset to 5.699% with the maturity remaining in 2025. In August 2023, AEP issued 10,048,668 shares of AEP common stock and received proceeds totaling $850 million under the settlement of the forward equity purchase contracts. AEP common stock held in treasury was used to settle the forward equity purchase contracts. The proceeds were used to pay down debt balances and support AEP’s overall capital expenditure plans. See Note 12 - Financing Activities for additional information.

Dividend Policy and Restrictions

The Board of Directors declared a quarterly dividend of $0.88 per share in October 2023. Future dividends may vary depending upon AEP’s profit levels, operating cash flow levels and capital requirements, as well as financial and other business conditions existing at the time. Parent’s income primarily derives from common stock equity in the earnings of its utility subsidiaries. Various financing arrangements and regulatory requirements may impose certain restrictions on the ability of the subsidiaries to transfer funds to Parent in the form of dividends. Management does not believe these restrictions will have any significant impact on its ability to access cash to meet the payment of dividends on its common stock. See “Dividend Restrictions” section of Note 12 for additional information.

Credit Ratings

AEP and its utility subsidiaries do not have any credit arrangements that would require material changes in payment schedules or terminations as a result of a credit downgrade, but its access to the commercial paper market may depend on its credit ratings.  In addition, downgrades in AEP’s credit ratings by one of the rating agencies could increase its borrowing costs.  Counterparty concerns about the credit quality of AEP or its utility subsidiaries could subject AEP to additional collateral demands under adequate assurance clauses under its derivative and non-derivative energy contracts.

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CASH FLOW

AEP relies primarily on cash flows from operations, debt issuances and its existing cash and cash equivalents to fund its liquidity and investing activities. AEP’s investing and capital requirements are primarily capital expenditures, repaying of long-term debt and paying dividends to shareholders. AEP uses short-term debt, including commercial paper, as a bridge to long-term debt financing. The levels of borrowing may vary significantly due to the timing of long-term debt financings and the impact of fluctuations in cash flows.

	Nine Months Ended  September 30,
	2023		2022
	(in millions)
Cash, Cash Equivalents and Restricted Cash at Beginning of Period	$	556.5	$	451.4
Net Cash Flows from Operating Activities	3,675.7		4,733.2
Net Cash Flows Used for Investing Activities	(4,643.5)		(5,822.5)
Net Cash Flows from Financing Activities	818.4		1,215.2
Net Increase (Decrease) in Cash and Cash Equivalents	(149.4)		125.9
Cash, Cash Equivalents and Restricted Cash at End of Period	$	407.1	$	577.3

Operating Activities

	Nine Months Ended  September 30,
	2023		2022
	(in millions)
Net Income	$	1,874.8	$	1,922.2
Non-Cash Adjustments to Net Income (a)	2,469.5		2,661.1
Mark-to-Market of Risk Management Contracts	(82.8)		162.3
Property Taxes	486.1		459.9
Deferred Fuel Over/Under-Recovery, Net	542.8		(148.7)
Change in Other Noncurrent Assets	(396.8)		(6.0)
Change in Other Noncurrent Liabilities	(21.5)		324.0
Change in Certain Components of Working Capital	(1,196.4)		(641.6)
Net Cash Flows from Operating Activities	$	3,675.7	$	4,733.2

(a)Non-Cash Adjustments to Net Income includes Depreciation and Amortization, Deferred Income Taxes, Loss on the Expected Sale of the Kentucky Operations, Loss on the Sale of the Competitive Contracted Renewables Portfolio, Asset Impairments and Other Related Charges, Impairment of Equity Method Investment, AFUDC, Gain on Sale of Mineral Rights and Establishment of 2017-2019 Virginia Triennial Review Regulatory Asset.

Net Cash Flows from Operating Activities decreased by $1.1 billion primarily due to the following:

•A $736 million decrease in cash from Changes in Other Noncurrent Assets and Liabilities. This decrease is primarily due to changes in regulatory assets and liabilities driven by timing differences between collections from and refunds to customers under rate rider mechanisms.

•A $555 million decrease in cash from the Change in Certain Components of Working Capital. The decrease is primarily due to the timing of accounts payable and property tax payments, increases in fuel, material and supplies driven by coal inventory on hand as a result of the mild current year weather and a decrease in margin deposits held due to unfavorable current year pricing variances. These decreases were partially offset by the timing of accounts receivable collections.

•A $245 million decrease primarily due to a reduction in collateral held associated with risk management contracts driven by the reduction in commodity prices.

•A $239 million decrease in cash from Net Income, after non-cash adjustments. See Results of Operations for further detail.

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These decreases in cash were partially offset by:

•A $692 million increase in cash primarily due to the timing of fuel and purchase power revenues and expenses. See the “Deferred Fuel Costs” section of Executive Overview for additional information.

Investing Activities

	Nine Months Ended  September 30,
	2023		2022
	(in millions)
Construction Expenditures	$	(5,767.1)	$	(4,748.5)
Acquisitions of Nuclear Fuel	(60.9)		(91.9)
Acquisitions of Renewable Energy Facilities	(154.0)		(1,207.3)
Proceeds from Sale of Assets	1,335.6		215.7
Other	2.9		9.5
Net Cash Flows Used for Investing Activities	$	(4,643.5)	$	(5,822.5)

Net Cash Flows Used for Investing Activities decreased by $1.2 billion primarily due to the following:

•A $1.1 billion decrease primarily due to the 2022 acquisition of Traverse, partially offset by the 2023 acquisition of the Rock Falls Wind Facility. See “Acquisitions” section of Note 6 for additional information.

•A $1.1 billion increase in Proceeds from Sale of Assets, primarily due to the sale of the competitive contracted renewables portfolio in 2023, partially offset by the sale of mineral rights in 2022. See “Dispositions” section of Note 6 for additional information.

These decreases in cash used were partially offset by:

•A $1 billion increase in Construction Expenditures, primarily due to increases in Vertically Integrated Utilities of $489 million, Transmission and Distribution Utilities of $394 million and AEP Transmission Holdco of $180 million.

Financing Activities

	Nine Months Ended  September 30,
	2023		2022
	(in millions)
Issuance of Common Stock	$	959.3	$	827.2
Issuance/Retirement of Debt, Net	1,282.7		1,837.6
Dividends Paid on Common Stock	(1,293.8)		(1,212.5)
Other	(129.8)		(237.1)
Net Cash Flows from Financing Activities	$	818.4	$	1,215.2

Net Cash Flows from Financing Activities decreased by $397 million primarily due to the following:

•A $1.5 billion decrease due to changes in short-term debt. See Note 12 - Financing Activities for additional information.

This decrease in cash was partially offset by:

•A $589 million increase in issuances of long-term debt. See Note 12 - Financing Activities for additional information.

•A $326 million decrease in retirements of long-term debt. See Note 12 - Financing Activities for additional information.

•A $132 million increase in issuances of common stock primarily due to the current year settlement of the 2020 equity units partially offset by the prior year settlement of the 2019 equity units.

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See the “Long-term Debt Subsequent Events” section of Note 12 for Long-term debt and other securities issued, retired and principal payments made after September 30, 2023 through November 2, 2023, the date that the third quarter 10-Q was filed.

BUDGETED CAPITAL EXPENDITURES

Management forecasts capital expenditures of $7.1 billion in 2023. For the four year period, 2024 through 2027, management forecasts capital expenditures of $32.9 billion. The expenditures are generally for transmission, generation, distribution, regulated renewables and required environmental investment to comply with the Federal EPA rules.  Estimated capital expenditures are subject to periodic review and modification and may vary based on the ongoing effects of regulatory constraints, environmental regulations, business opportunities, market volatility, economic trends, supply chain issues, weather, legal reviews, inflation and the ability to access capital.  Management expects to fund these capital expenditures through cash flows from operations, proceeds from the strategic sale of assets and financing activities.  Generally, the Registrant Subsidiaries use cash or short-term borrowings under the money pool to fund these expenditures until long-term funding is arranged. For complete information of forecasted capital expenditures, see “Budgeted Capital Expenditures” section of “Management’s Discussion and Analysis of Financial Condition and Results of Operations” in the 2022 Annual Report.

SIGNIFICANT CASH REQUIREMENTS

A summary of significant cash requirements is included in the 2022 Annual Report and has not changed significantly from year-end other than the debt issuances and retirements discussed in the “Cash Flow” section above.

CRITICAL ACCOUNTING POLICIES AND ESTIMATES AND ACCOUNTING STANDARDS

CRITICAL ACCOUNTING POLICIES AND ESTIMATES

See the “Critical Accounting Policies and Estimates” section of “Management’s Discussion and Analysis of Financial Condition and Results of Operations” in the 2022 Annual Report for a discussion of the estimates and judgments required for regulatory accounting, revenue recognition, derivative instruments, the valuation of long-lived assets, the accounting for pension and other postretirement benefits and the impact of new accounting standards.

ACCOUNTING STANDARDS

See Note 2 - New Accounting Standards for information related to accounting standards. There are no new standards expected to have a material impact to the Registrants’ financial statements.

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QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

Market Risks

The Vertically Integrated Utilities segment is exposed to certain market risks as a major power producer and through transactions in power, coal, natural gas and marketing contracts. These risks include commodity price risks which may be subject to capacity risk, credit risk as well as interest rate risk. These risks represent the risk of loss that may impact this segment due to changes in the underlying market prices or rates.

The Transmission and Distribution Utilities segment is exposed to energy procurement risk and interest rate risk.

The Generation & Marketing segment conducts marketing, risk management and retail activities in ERCOT, PJM, SPP and MISO. This segment is exposed to certain market risks as a marketer of wholesale and retail electricity. These risks include commodity price risks which may be subject to capacity risk, credit risk as well as interest rate risk. These risks represent the risk of loss that may impact this segment due to changes in the underlying market prices or rates. In addition, the Generation & Marketing segment is also exposed to certain market risks as a power producer and through transactions in wholesale electricity, natural gas and marketing contracts.

Management employs risk management contracts including physical forward and financial forward purchase-and-sale contracts.  Management engages in risk management of power, capacity, coal, natural gas and, to a lesser extent, heating oil, gasoline and other commodity contracts to manage the risk associated with the energy business.  As a result, AEP is subject to price risk.  The amount of risk taken is determined by the Commercial Operations, Energy Supply and Finance groups in accordance with established risk management policies as approved by the Finance Committee of the Board of Directors.  AEPSC’s market risk oversight staff independently monitors risk policies, procedures and risk levels and provides members of the Regulated Risk Committee and the Energy Supply Risk Committee (Competitive Risk Committee) various reports regarding compliance with policies, limits and procedures.  The Regulated Risk Committee consists of AEPSC’s Chief Financial Officer, Chief Commercial Officer, Executive Vice President Utilities, Senior Vice President of Regulated Commercial Operations, Senior Vice President of Treasury and Risk and Chief Risk Officer.  The Competitive Risk Committee consists of AEPSC’s Chief Financial Officer, Chief Commercial Officer, Senior Vice President of Treasury and Risk, Senior Vice President of Competitive Commercial Operations and Chief Risk Officer.  When commercial activities exceed predetermined limits, positions are modified to reduce the risk to be within the limits unless specifically approved by the respective committee.

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The following table summarizes the reasons for changes in total MTM value as compared to December 31, 2022:

MTM Risk Management Contract Net Assets (Liabilities)
Nine Months Ended September 30, 2023
	Vertically Integrated Utilities		Transmission and Distribution Utilities		Generation & Marketing		Total
	(in millions)
Total MTM Risk Management Contract Net Assets (Liabilities) as of December 31, 2022	$	134.7	$	(40.0)	$	360.5	$	455.2
(Gain)/Loss from Contracts Realized/Settled During the Period and Entered in a Prior Period	(136.6)		1.1		(150.6)		(286.1)
Fair Value of New Contracts at Inception When Entered During the Period (a)	—		—		1.5		1.5
Changes in Fair Value Due to Market Fluctuations During the Period (b)	2.1		—		(45.9)		(43.8)
Changes in Fair Value Allocated to Regulated Jurisdictions (c)	111.0		(11.9)		—		99.1
Total MTM Risk Management Contract Net Assets (Liabilities) as of September 30, 2023	$	111.2	$	(50.8)	$	165.5	225.9
Commodity Cash Flow Hedge Contracts							127.8
Fair Value Hedge Contracts							(138.1)
Collateral Deposits							(92.6)
Total MTM Derivative Contract Net Assets as of September 30, 2023							$	123.0

(a)Reflects fair value on primarily long-term structured contracts which are typically with customers that seek fixed pricing to limit their risk against fluctuating energy prices. The contract prices are valued against market curves associated with the delivery location and delivery term. A significant portion of the total volumetric position has been economically hedged.

(b)Market fluctuations are attributable to various factors such as supply/demand, weather, etc.

(c)Relates to the net gains (losses) of those contracts that are not reflected on the statements of income.  These net gains (losses) are recorded as regulatory liabilities/assets or accounts payable on the balance sheet.

See Note 9 – Derivatives and Hedging and Note 10 – Fair Value Measurements for additional information related to risk management contracts.  The following tables and discussion provide information on credit risk and market volatility risk.

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Credit Risk

Credit risk is mitigated in wholesale marketing and trading activities by assessing the creditworthiness of potential counterparties before entering into transactions with them and continuing to evaluate their creditworthiness on an ongoing basis. Management uses credit agency ratings and current market-based qualitative and quantitative data as well as financial statements to assess the financial health of counterparties on an ongoing basis.

AEP has risk management contracts (includes non-derivative contracts) with numerous counterparties. Since open risk management contracts are valued based on changes in market prices of the related commodities, exposures change daily. As of September 30, 2023, credit exposure net of collateral to sub investment grade counterparties was approximately 5.25%, expressed in terms of net MTM assets, net receivables and the net open positions for contracts not subject to MTM (representing economic risk even though there may not be risk of accounting loss).

As of September 30, 2023, the following table approximates AEP’s counterparty credit quality and exposure based on netting across commodities, instruments and legal entities where applicable:

Counterparty Credit Quality	Exposure Before Credit Collateral		Credit Collateral		Net Exposure		Number of Counterparties >10% of Net Exposure	Net Exposure of Counterparties >10%
	(in millions, except number of counterparties)
Investment Grade	$	411.1	$	83.6	$	327.5	2	$	123.3
Split Rating	20.6		—		20.6		1	20.6
No External Ratings:
Internal Investment Grade	53.3		23.1		30.2		2	15.3
Internal Noninvestment Grade	46.7		25.7		21.0		1	17.5
Total as of September 30, 2023	$	531.7	$	132.4	$	399.3

All exposure in the table above relates to AEPSC and AEPEP as AEPSC is agent for and transacts on behalf of certain AEP subsidiaries, including the Registrant Subsidiaries and AEPEP is agent for and transacts on behalf of other AEP subsidiaries.

In addition, AEP is exposed to credit risk related to participation in RTOs. For each of the RTOs in which AEP participates, this risk is generally determined based on the proportionate share of member gross activity over a specified period of time.

Value at Risk (VaR) Associated with Risk Management Contracts

Management uses a risk measurement model, which calculates VaR, to measure AEP’s commodity price risk in the risk management portfolio. The VaR is based on the variance-covariance method using historical prices to estimate volatilities and correlations and assumes a 95% confidence level and a one-day holding period. Based on this VaR analysis, as of September 30, 2023, a near term typical change in commodity prices is not expected to materially impact net income, cash flows or financial condition.

Management calculates the VaR for both a trading and non-trading portfolio. The trading portfolio consists primarily of contracts related to energy trading and marketing activities. The non-trading portfolio consists primarily of economic hedges of generation and retail supply activities.

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The following tables show the end, high, average and low market risk as measured by VaR for the periods indicated:

VaR Model

Trading Portfolio

Nine Months Ended								Twelve Months Ended
September 30, 2023								December 31, 2022
End		High		Average		Low		End		High		Average		Low
(in millions)								(in millions)
$	0.1	$	0.9	$	0.2	$	0.1	$	0.5	$	4.5	$	0.7	$	0.1

VaR Model

Non-Trading Portfolio

Nine Months Ended								Twelve Months Ended
September 30, 2023								December 31, 2022
End		High		Average		Low		End		High		Average		Low
(in millions)								(in millions)
$	13.1	$	32.7	$	16.4	$	6.1	$	17.7	$	76.9	$	24.7	$	6.7

Management back-tests VaR results against performance due to actual price movements. Based on the assumed 95% confidence interval, the performance due to actual price movements would be expected to exceed the VaR at least once every 20 trading days.

As the VaR calculation captures recent price movements, management also performs regular stress testing of the trading portfolio to understand AEP’s exposure to extreme price movements. A historical-based method is employed whereby the current trading portfolio is subjected to actual, observed price movements from the last several years in order to ascertain which historical price movements translated into the largest potential MTM loss. Management then researches the underlying positions, price movements and market events that created the most significant exposure and reports the findings to the Risk Executive Committee, Regulated Risk Committee or Competitive Risk Committee as appropriate.

Interest Rate Risk

AEP is exposed to interest rate market fluctuations in the normal course of business operations. Prior to 2022, interest rates remained at low levels and the Federal Reserve maintained the federal funds target range at 0.0% to 0.25% for much of 2021. However, during 2022, the Federal Reserve approved several rate increases for a cumulative total of a 4.25% increase. In the first nine months of 2023, the Federal Reserve approved another four rate increases for a cumulative total of a 1.0% rate increase and further increases in interest rates may be authorized during 2023. AEP has outstanding short and long-term debt which is subject to variable rates. AEP manages interest rate risk by limiting variable-rate exposures to a percentage of total debt, by entering into interest rate derivative instruments and by monitoring the effects of market changes in interest rates. For the nine months ended September 30, 2023 and 2022, a 100 basis point change in the benchmark rate on AEP’s variable rate debt would impact pretax interest expense annually by $45 million and $47 million, respectively.

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AMERICAN ELECTRIC POWER COMPANY, INC. AND SUBSIDIARY COMPANIES

CONDENSED CONSOLIDATED STATEMENTS OF INCOME

For the Three and Nine Months Ended September 30, 2023 and 2022

(in millions, except per-share and share amounts)

(Unaudited)

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2023		2022		2023		2022
REVENUES
Vertically Integrated Utilities	$	3,158.1	$	3,174.6	$	8,603.4	$	8,416.4
Transmission and Distribution Utilities	1,535.2		1,525.5		4,321.3		4,064.5
Generation & Marketing	527.5		733.1		1,172.6		1,997.0
Other Revenues	120.9		92.9		307.8		280.5
TOTAL REVENUES	5,341.7		5,526.1		14,405.1		14,758.4
EXPENSES
Purchased Electricity, Fuel and Other Consumables Used for Electric Generation	1,756.8		2,111.9		4,887.8		5,177.0
Other Operation	719.9		797.0		2,031.1		2,079.0
Maintenance	325.5		298.1		982.8		909.6
Loss on the Expected Sale of the Kentucky Operations	—		194.5		—		263.3
Loss on the Sale of the Competitive Contracted Renewables Portfolio	—		—		112.0		—
Asset Impairments and Other Related Charges	—		24.9		—		24.9
Establishment of 2017-2019 Virginia Triennial Review Regulatory Asset	—		(37.0)		—		(37.0)
Gain on Sale of Mineral Rights	—		—		—		(116.3)
Depreciation and Amortization	792.3		821.8		2,309.4		2,416.8
Taxes Other Than Income Taxes	393.9		384.8		1,149.2		1,118.5
TOTAL EXPENSES	3,988.4		4,596.0		11,472.3		11,835.8
OPERATING INCOME	1,353.3		930.1		2,932.8		2,922.6
Other Income (Expense):
Other Income (Expense)	11.9		4.8		41.0		(5.6)
Allowance for Equity Funds Used During Construction	51.1		35.6		123.4		95.2
Non-Service Cost Components of Net Periodic Benefit Cost	55.2		47.2		165.9		141.5
Interest Expense	(470.3)		(360.7)		(1,346.0)		(1,001.7)
INCOME BEFORE INCOME TAX EXPENSE (BENEFIT) AND EQUITY EARNINGS (LOSS)	1,001.2		657.0		1,917.1		2,152.0
Income Tax Expense (Benefit)	64.2		(16.1)		103.2		90.7
Equity Earnings (Loss) of Unconsolidated Subsidiaries	21.3		10.2		60.9		(139.1)
NET INCOME	958.3		683.3		1,874.8		1,922.2
Net Income (Loss) Attributable to Noncontrolling Interests	4.6		(0.4)		2.9		(0.7)
EARNINGS ATTRIBUTABLE TO AEP COMMON SHAREHOLDERS	$	953.7	$	683.7	$	1,871.9	$	1,922.9
WEIGHTED AVERAGE NUMBER OF BASIC AEP COMMON SHARES OUTSTANDING	520,459,880		513,730,196		516,528,239		511,162,723
TOTAL BASIC EARNINGS PER SHARE ATTRIBUTABLE TO AEP COMMON SHAREHOLDERS	$	1.83	$	1.33	$	3.62	$	3.76
WEIGHTED AVERAGE NUMBER OF DILUTED AEP COMMON SHARES OUTSTANDING	521,444,125		515,315,994		517,784,726		512,714,006
TOTAL DILUTED EARNINGS PER SHARE ATTRIBUTABLE TO AEP COMMON SHAREHOLDERS	$	1.83	$	1.33	$	3.62	$	3.75
See Condensed Notes to Condensed Financial Statements of Registrants beginning on page 114.

47

AMERICAN ELECTRIC POWER COMPANY, INC. AND SUBSIDIARY COMPANIES

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS)

For the Three and Nine Months Ended September 30, 2023 and 2022

(in millions)

(Unaudited)

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2023		2022		2023		2022
Net Income	$	958.3	$	683.3	$	1,874.8	$	1,922.2
OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAXES
Cash Flow Hedges, Net of Tax of $(0.3) and $(19.5) for the Three Months Ended September 30, 2023 and 2022, Respectively, and $(31.5) and $81.6 for the Nine Months Ended September 30, 2023 and 2022, Respectively	(0.9)		(73.3)		(118.5)		307.1
Amortization of Pension and OPEB Deferred Costs, Net of Tax of $(0.8) and $(0.8) for the Three Months Ended September 30, 2023 and 2022, Respectively, and $(5.9) and $(4.5) for the Nine Months Ended September 30, 2023 and 2022, Respectively	(3.2)		(3.2)		(22.4)		(17.0)
Reclassifications of KPCo Pension and OPEB Regulatory Assets, Net of Tax of $0 and $0 for the Three Months Ended September 30, 2023 and 2022, Respectively, and $4.4 and $0 for the Nine Months Ended September 30, 2023 and 2022, Respectively	—		—		16.7		—
TOTAL OTHER COMPREHENSIVE INCOME (LOSS)	(4.1)		(76.5)		(124.2)		290.1
TOTAL COMPREHENSIVE INCOME	954.2		606.8		1,750.6		2,212.3
Total Comprehensive Income (Loss) Attributable To Noncontrolling Interests	4.6		(0.4)		2.9		(0.7)
TOTAL COMPREHENSIVE INCOME ATTRIBUTABLE TO AEP COMMON SHAREHOLDERS	$	949.6	$	607.2	$	1,747.7	$	2,213.0
See Condensed Notes to Condensed Financial Statements of Registrants beginning on page 114.

48

AMERICAN ELECTRIC POWER COMPANY, INC. AND SUBSIDIARY COMPANIES

CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY

For the Nine Months Ended September 30, 2023 and 2022

(in millions)

(Unaudited)

	AEP Common Shareholders
	Common Stock								Accumulated Other Comprehensive Income (Loss)
	Shares	Amount		Paid-in Capital		Retained Earnings					Noncontrolling Interests		Total
TOTAL EQUITY – DECEMBER 31, 2021	524.4	$	3,408.7	$	7,172.6	$	11,667.1		$	184.8	$	247.0	$	22,680.2
Issuance of Common Stock	0.4	2.4		807.1									809.5
Common Stock Dividends						(395.2)		(a)			(3.6)		(398.8)
Other Changes in Equity				(15.2)		(1.5)							(16.7)
Net Income						714.7					3.4		718.1
Other Comprehensive Income									245.8				245.8
TOTAL EQUITY – MARCH 31, 2022	524.8	3,411.1		7,964.5		11,985.1			430.6		246.8		24,038.1
Issuance of Common Stock	0.1	0.9		2.3									3.2
Common Stock Dividends						(402.6)		(a)			(2.1)		(404.7)
Other Changes in Equity				17.2		1.6							18.8
Net Income (Loss)						524.5					(3.7)		520.8
Other Comprehensive Income									120.8				120.8
TOTAL EQUITY – JUNE 30, 2022	524.9	3,412.0		7,984.0		12,108.6			551.4		241.0		24,297.0
Issuance of Common Stock	0.1	0.5		14.0									14.5
Common Stock Dividends						(402.5)		(a)			(6.5)		(409.0)
Other Changes in Equity				3.0									3.0
Net Income (Loss)						683.7					(0.4)		683.3
Other Comprehensive Loss									(76.5)				(76.5)
TOTAL EQUITY – SEPTEMBER 30, 2022	525.0	$	3,412.5	$	8,001.0	$	12,389.8		$	474.9	$	234.1	$	24,512.3
TOTAL EQUITY – DECEMBER 31, 2022	525.1	$	3,413.1	$	8,051.0	$	12,345.6		$	83.7	$	229.0	$	24,122.4
Issuance of Common Stock	0.8	5.1		36.0									41.1
Common Stock Dividends						(428.8)		(b)			(3.0)		(431.8)
Other Changes in Equity				(12.7)							0.2		(12.5)
Net Income						397.0					3.4		400.4
Other Comprehensive Loss									(151.8)				(151.8)
TOTAL EQUITY – MARCH 31, 2023	525.9	3,418.2		8,074.3		12,313.8			(68.1)		229.6		23,967.8
Issuance of Common Stock	0.5	3.3		33.2									36.5
Common Stock Dividends						(429.5)		(b)			(2.3)		(431.8)
Other Changes in Equity				3.3									3.3
Net Income (Loss)						521.2					(5.1)		516.1
Other Comprehensive Income									31.7				31.7
TOTAL EQUITY – JUNE 30, 2023	526.4	3,421.5		8,110.8		12,405.5			(36.4)		222.2		24,123.6
Issuance of Common Stock	0.4	2.8		878.9									881.7
Common Stock Dividends						(429.7)		(b)			(0.5)		(430.2)
Other Changes in Equity				6.7									6.7
Disposition of Competitive Contracted Renewables Portfolio											(186.4)		(186.4)
Net Income						953.7					4.6		958.3
Other Comprehensive Loss									(4.1)				(4.1)
TOTAL EQUITY – SEPTEMBER 30, 2023	526.8	$	3,424.3	$	8,996.4	$	12,929.5		$	(40.5)	$	39.9	$	25,349.6

(a)    Cash dividends declared per AEP common share were $0.78.

(b)    Cash dividends declared per AEP common share were $0.83.

See Condensed Notes to Condensed Financial Statements of Registrants beginning on page 114.

49

AMERICAN ELECTRIC POWER COMPANY, INC. AND SUBSIDIARY COMPANIES

CONDENSED CONSOLIDATED BALANCE SHEETS

ASSETS

September 30, 2023 and December 31, 2022

(in millions)

(Unaudited)

	September 30,		December 31,
	2023		2022
CURRENT ASSETS
Cash and Cash Equivalents	$	353.3	$	509.4
Restricted Cash (September 30, 2023 and December 31, 2022 Amounts Include $53.8 and $47.1, Respectively, Related to Transition Funding, Restoration Funding and Appalachian Consumer Rate Relief Funding)	53.8		47.1
Other Temporary Investments (September 30, 2023 and December 31, 2022 Amounts Include $202 and $182.9, Respectively, Related to EIS and Transource Energy)	211.0		187.6
Accounts Receivable:
Customers	976.8		1,145.1
Accrued Unbilled Revenues	270.2		322.9
Pledged Accounts Receivable – AEP Credit	1,299.2		1,207.4
Miscellaneous	77.4		49.7
Allowance for Uncollectible Accounts	(58.6)		(57.1)
Total Accounts Receivable	2,565.0		2,668.0
Fuel	726.8		435.1
Materials and Supplies	993.2		915.1
Risk Management Assets	262.7		348.8
Accrued Tax Benefits	160.3		99.4
Regulatory Asset for Under-Recovered Fuel Costs	1,087.6		1,310.0
Prepayments and Other Current Assets	322.9		255.0
TOTAL CURRENT ASSETS	6,736.6		6,775.5
PROPERTY, PLANT AND EQUIPMENT
Electric:
Generation	24,178.0		25,834.2
Transmission	34,731.0		33,266.9
Distribution	28,444.0		27,138.8
Other Property, Plant and Equipment (Including Coal Mining and Nuclear Fuel)	6,251.1		5,971.8
Construction Work in Progress	6,394.4		4,809.7
Total Property, Plant and Equipment	99,998.5		97,021.4
Accumulated Depreciation and Amortization	24,177.4		23,682.3
TOTAL PROPERTY, PLANT AND EQUIPMENT – NET	75,821.1		73,339.1
OTHER NONCURRENT ASSETS
Regulatory Assets	4,607.3		4,762.0
Securitized Assets	365.4		446.0
Spent Nuclear Fuel and Decommissioning Trusts	3,539.7		3,341.2
Goodwill	52.5		52.5
Long-term Risk Management Assets	290.2		284.1
Operating Lease Assets	619.1		645.5
Deferred Charges and Other Noncurrent Assets	3,093.7		3,757.4
TOTAL OTHER NONCURRENT ASSETS	12,567.9		13,288.7
TOTAL ASSETS	$	95,125.6	$	93,403.3
See Condensed Notes to Condensed Financial Statements of Registrants beginning on page 114.

50

AMERICAN ELECTRIC POWER COMPANY, INC. AND SUBSIDIARY COMPANIES

CONDENSED CONSOLIDATED BALANCE SHEETS

LIABILITIES AND EQUITY

September 30, 2023 and December 31, 2022

(in millions, except per-share and share amounts)

(Unaudited)

			September 30,		December 31,
			2023		2022
CURRENT LIABILITIES
Accounts Payable			$	2,258.6	$	2,670.8
Short-term Debt:
Securitized Debt for Receivables – AEP Credit			900.0		750.0
Other Short-term Debt			1,830.4		3,362.2
Total Short-term Debt			2,730.4		4,112.2
Long-term Debt Due Within One Year (September 30, 2023 and December 31, 2022 Amounts Include $184.4 and $218.2, Respectively, Related to Sabine, DCC Fuel, Transition Funding, Restoration Funding, Appalachian Consumer Rate Relief Funding and Transource Energy)			2,773.6		2,486.4
Risk Management Liabilities			151.5		145.2
Customer Deposits			379.6		408.8
Accrued Taxes			1,201.0		1,714.6
Accrued Interest			485.9		336.5
Obligations Under Operating Leases			117.7		113.6
Other Current Liabilities			1,179.8		1,278.2
TOTAL CURRENT LIABILITIES			11,278.1		13,266.3
NONCURRENT LIABILITIES
Long-term Debt (September 30, 2023 and December 31, 2022 Amounts Include $553.5 and $755.3, Respectively, Related to Sabine, DCC Fuel, Transition Funding, Restoration Funding, Appalachian Consumer Rate Relief Funding and Transource Energy)			36,715.5		34,314.6
Long-term Risk Management Liabilities			278.4		345.2
Deferred Income Taxes			9,267.2		8,896.9
Regulatory Liabilities and Deferred Investment Tax Credits			7,916.3		8,115.6
Asset Retirement Obligations			2,895.2		2,879.3
Employee Benefits and Pension Obligations			238.3		257.3
Obligations Under Operating Leases			514.6		552.5
Deferred Credits and Other Noncurrent Liabilities			597.3		607.3
TOTAL NONCURRENT LIABILITIES			58,422.8		55,968.7
TOTAL LIABILITIES			69,700.9		69,235.0
Rate Matters (Note 4)
Commitments and Contingencies (Note 5)
MEZZANINE EQUITY
Contingently Redeemable Performance Share Awards			75.1		45.9
TOTAL MEZZANINE EQUITY			75.1		45.9
EQUITY
Common Stock – Par Value – $6.50 Per Share:
	2023	2022
Shares Authorized	600,000,000	600,000,000
Shares Issued	526,819,992	525,099,321
(1,184,572 and 11,233,240 Shares were Held in Treasury as of September 30, 2023 and December 31, 2022, Respectively)			3,424.3		3,413.1
Paid-in Capital			8,996.4		8,051.0
Retained Earnings			12,929.5		12,345.6
Accumulated Other Comprehensive Income (Loss)			(40.5)		83.7
TOTAL AEP COMMON SHAREHOLDERS’ EQUITY			25,309.7		23,893.4
Noncontrolling Interests			39.9		229.0
TOTAL EQUITY			25,349.6		24,122.4
TOTAL LIABILITIES, MEZZANINE EQUITY AND TOTAL EQUITY			$	95,125.6	$	93,403.3
See Condensed Notes to Condensed Financial Statements of Registrants beginning on page 114.

51

AMERICAN ELECTRIC POWER COMPANY, INC. AND SUBSIDIARY COMPANIES

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

For the Nine Months Ended September 30, 2023 and 2022

(in millions)

(Unaudited)

	Nine Months Ended September 30,
	2023		2022
OPERATING ACTIVITIES
Net Income	$	1,874.8	$	1,922.2
Adjustments to Reconcile Net Income to Net Cash Flows from Operating Activities:
Depreciation and Amortization	2,309.4		2,416.8
Deferred Income Taxes	171.5		16.6
Loss on the Expected Sale of the Kentucky Operations	—		263.3
Loss on the Sale of the Competitive Contracted Renewables Portfolio	112.0		—
Asset Impairments and Other Related Charges	—		24.9
Impairment of Equity Method Investment	—		188.0
Allowance for Equity Funds Used During Construction	(123.4)		(95.2)
Mark-to-Market of Risk Management Contracts	(82.8)		162.3
Property Taxes	486.1		459.9
Deferred Fuel Over/Under-Recovery, Net	542.8		(148.7)
Gain on Sale of Mineral Rights	—		(116.3)
Establishment of 2017-2019 Virginia Triennial Review Regulatory Asset	—		(37.0)
Change in Other Noncurrent Assets	(396.8)		(6.0)
Change in Other Noncurrent Liabilities	(21.5)		324.0
Changes in Certain Components of Working Capital:
Accounts Receivable, Net	114.0		(495.7)
Fuel, Materials and Supplies	(344.4)		(134.6)
Accounts Payable	(163.0)		369.4
Accrued Taxes, Net	(566.7)		(512.8)
Other Current Assets	(91.5)		41.2
Other Current Liabilities	(144.8)		90.9
Net Cash Flows from Operating Activities	3,675.7		4,733.2
INVESTING ACTIVITIES
Construction Expenditures	(5,767.1)		(4,748.5)
Purchases of Investment Securities	(2,199.7)		(1,868.2)
Sales of Investment Securities	2,140.1		1,833.4
Acquisitions of Nuclear Fuel	(60.9)		(91.9)
Acquisitions of Renewable Energy Facilities	(154.0)		(1,207.3)
Proceeds from Sales of Assets	1,335.6		215.7
Other Investing Activities	62.5		44.3
Net Cash Flows Used for Investing Activities	(4,643.5)		(5,822.5)
FINANCING ACTIVITIES
Issuance of Common Stock	959.3		827.2
Issuance of Long-term Debt	4,017.8		3,428.4
Issuance of Short-term Debt with Original Maturities greater than 90 Days	791.7		271.0
Change in Short-term Debt with Original Maturities less than 90 Days, Net	(1,044.7)		803.4
Retirement of Long-term Debt	(1,353.3)		(1,679.1)
Redemption of Short-term Debt with Original Maturities Greater than 90 Days	(1,128.8)		(986.1)
Principal Payments for Finance Lease Obligations	(53.9)		(120.3)
Dividends Paid on Common Stock	(1,293.8)		(1,212.5)
Other Financing Activities	(75.9)		(116.8)
Net Cash Flows from Financing Activities	818.4		1,215.2
Net Increase (Decrease) in Cash and Cash Equivalents	(149.4)		125.9
Cash, Cash Equivalents and Restricted Cash at Beginning of Period	556.5		451.4
Cash, Cash Equivalents and Restricted Cash at End of Period	$	407.1	$	577.3
See Condensed Notes to Condensed Financial Statements of Registrants beginning on page 114.

52

AEP TEXAS INC. AND SUBSIDIARIES

MANAGEMENT’S NARRATIVE DISCUSSION AND ANALYSIS OF RESULTS OF OPERATIONS

RESULTS OF OPERATIONS

KWh Sales/Degree Days

Summary of KWh Energy Sales

	Three Months Ended		Nine Months Ended
	September 30,		September 30,
	2023	2022	2023	2022
	(in millions of KWhs)
Retail:
Residential	4,681	4,079	10,295	10,453
Commercial	4,021	3,243	10,208	8,482
Industrial	3,065	2,993	9,344	8,443
Miscellaneous	196	185	487	499
Total Retail	11,963	10,500	30,334	27,877

Heating degree days and cooling degree days are metrics commonly used in the utility industry as a measure of the impact of weather on revenues.

Summary of Heating and Cooling Degree Days

	Three Months Ended		Nine Months Ended
	September 30,		September 30,
	2023	2022	2023	2022
	(in degree days)
Actual – Heating (a)	—	—	143	278
Normal – Heating (b)	—	—	197	193
Actual – Cooling (c)	1,719	1,478	2,945	2,701
Normal – Cooling (b)	1,387	1,382	2,454	2,433

(a)Heating degree days are calculated on a 55 degree temperature base.

(b)Normal Heating/Cooling represents the thirty-year average of degree days.

(c)Cooling degree days are calculated on a 70 degree temperature base.

53

AEP Texas Inc. and Subsidiaries
Reconciliation of 2022 to 2023 Net Income
(in millions)
	Three Months Ended  September 30,		Nine Months Ended  September 30,
2022 Net Income	$	93.6	$	253.2
Changes in Revenues:
Retail Revenues	32.7		(2.9)
Transmission Revenues	13.7		46.3
Other Revenues	(0.7)		(2.5)
Total Change in Revenues	45.7		40.9
Changes in Expenses and Other:
Other Operation and Maintenance	7.1		30.8
Depreciation and Amortization	(7.9)		(8.8)
Taxes Other Than Income Taxes	(3.1)		(11.1)
Interest Income	(0.8)		(1.2)
Allowance for Equity Funds Used During Construction	2.6		6.2
Non-Service Cost Components of Net Periodic Benefit Cost	0.6		1.9
Interest Expense	(4.5)		(19.9)
Total Change in Expenses and Other	(6.0)		(2.1)
Income Tax Expense	(7.8)		(9.8)
2023 Net Income	$	125.5	$	282.2

Third Quarter of 2023 Compared to Third Quarter of 2022

The major components of the increase in revenues were as follows:

•Retail Revenues increased $33 million primarily due to the following:

•A $15 million increase in weather-normalized revenues primarily in the residential and commercial classes.

•A $10 million increase in weather-related usage primarily due to a 16% increase in cooling degree days.

•A $7 million increase in revenue from rate riders. This increase was partially offset in other expense items below.

•Transmission Revenues increased $14 million due to the following:

•An $8 million increase due to increased load.

•A $6 million increase in interim rates driven by increased transmission investments.

Expenses and Other and Income Tax Expense changed between years as follows:

•Other Operation and Maintenance expenses decreased $7 million primarily due to employee-related expenses.

•Depreciation and Amortization expenses increased $8 million primarily due to a higher depreciable base.

•Interest Expense increased $5 million due to higher long term debt balances and interest rates.

•Income Tax Expense increased $8 million primarily due to an increase in pretax book income.

54

Nine Months Ended September 30, 2023 Compared to Nine Months Ended September 30, 2022

The major components of the increase in revenues were as follows:

•Retail Revenues decreased $3 million primarily due to the following:

•A $9 million decrease in weather-normalized revenues due to an unfavorable sales mix.

This decrease was partially offset by:

•A $4 million increase in revenue from rate riders. This increase was partially offset in other expense items below.

•Transmission Revenues increased $46 million due to the following:

•A $24 million increase in interim rates driven by increased transmission investment.

•A $22 million increase due to increased load.

Expenses and Other and Income Tax Expense changed between years as follows:

•Other Operation and Maintenance expenses decreased $31 million primarily due to the following:

•A $30 million decrease due to legislation passed in Texas in May 2023 allowing employee financially based incentives to be recovered.

•A $12 million decrease in employee-related expenses.

•A $5 million decrease in transmission expenses. This decrease was offset in Retail Revenues above.

These decreases were partially offset by:

•A $14 million increase in distribution-related expenses.

•Depreciation and Amortization expenses increased $9 million due to the following:

•A $20 million increase due to a higher depreciable base.

This increase was partially offset by:

•An $11 million decrease in recoverable advanced metering system depreciable expenses.

•Taxes Other Than Income Taxes increased $11 million primarily due to higher property taxes driven by increased investment.

•Allowance for Equity Funds Used During Construction increased $6 million due to a higher AFUDC base.

•Interest Expense increased $20 million primarily due to the following:

•A $32 million increase due to higher debt balances and interest rates.

This increase was partially offset by:

•A $10 million decrease due to an increase in AFUDC base.

•Income Tax Expense increased $10 million primarily due to an increase in pretax book income.

55

AEP TEXAS INC. AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF INCOME

For the Three and Nine Months Ended September 30, 2023 and 2022

(in millions)

(Unaudited)

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2023		2022		2023		2022
REVENUES
Electric Transmission and Distribution	$	551.6	$	507.7	$	1,438.7	$	1,399.3
Sales to AEP Affiliates	1.2		0.9		3.7		2.6
Other Revenues	1.8		0.3		2.9		2.5
TOTAL REVENUES	554.6		508.9		1,445.3		1,404.4
EXPENSES
Other Operation	154.4		163.8		395.2		431.6
Maintenance	25.0		22.7		75.7		70.1
Depreciation and Amortization	125.6		117.7		351.5		342.7
Taxes Other Than Income Taxes	48.6		45.5		136.9		125.8
TOTAL EXPENSES	353.6		349.7		959.3		970.2
OPERATING INCOME	201.0		159.2		486.0		434.2
Other Income (Expense):
Interest Income	0.5		1.3		1.5		2.7
Allowance for Equity Funds Used During Construction	7.8		5.2		19.4		13.2
Non-Service Cost Components of Net Periodic Benefit Cost	4.8		4.2		14.4		12.5
Interest Expense	(59.9)		(55.4)		(173.1)		(153.2)
INCOME BEFORE INCOME TAX EXPENSE	154.2		114.5		348.2		309.4
Income Tax Expense	28.7		20.9		66.0		56.2
NET INCOME	$	125.5	$	93.6	$	282.2	$	253.2
The common stock of AEP Texas is wholly-owned by Parent.
See Condensed Notes to Condensed Financial Statements of Registrants beginning on page 114.

56

AEP TEXAS INC. AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS)

For the Three and Nine Months Ended September 30, 2023 and 2022

(in millions)

(Unaudited)

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2023		2022		2023		2022
Net Income	$	125.5	$	93.6	$	282.2	$	253.2
OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAXES
Cash Flow Hedges, Net of Tax of $0 and $0.1 for the Three Months Ended September 30, 2023 and 2022, Respectively, and $0.8 and $0.2 for the Nine Months Ended September 30, 2023 and 2022, Respectively	(0.1)		0.3		3.1		0.8
Amortization of Pension and OPEB Deferred Costs, Net of Tax of $0 and $0 for the Three Months Ended September 30, 2023 and 2022, Respectively, and $(0.1) and $0 for the Nine Months Ended September 30, 2023 and 2022, Respectively	—		—		(0.6)		—
TOTAL OTHER COMPREHENSIVE INCOME (LOSS)	(0.1)		0.3		2.5		0.8
TOTAL COMPREHENSIVE INCOME	$	125.4	$	93.9	$	284.7	$	254.0
See Condensed Notes to Condensed Financial Statements of Registrants beginning on page 114.

57

AEP TEXAS INC. AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN

COMMON SHAREHOLDER’S EQUITY

For the Nine Months Ended September 30, 2023 and 2022

(in millions)

(Unaudited)

	Paid-in Capital		Retained Earnings		Accumulated Other Comprehensive Income (Loss)		Total
TOTAL COMMON SHAREHOLDER’S EQUITY – DECEMBER 31, 2021	$	1,553.9	$	2,046.8	$	(6.5)	$	3,594.2
Net Income			69.6				69.6
Other Comprehensive Income					0.3		0.3
TOTAL COMMON SHAREHOLDER’S EQUITY – MARCH 31, 2022	1,553.9		2,116.4		(6.2)		3,664.1
Capital Contribution from Parent	1.3						1.3
Net Income			90.0				90.0
Other Comprehensive Income					0.2		0.2
TOTAL COMMON SHAREHOLDER’S EQUITY – JUNE 30, 2022	1,555.2		2,206.4		(6.0)		3,755.6
Capital Contribution from Parent	0.5						0.5
Net Income			93.6				93.6
Other Comprehensive Income					0.3		0.3
TOTAL COMMON SHAREHOLDER’S EQUITY – SEPTEMBER 30, 2022	$	1,555.7	$	2,300.0	$	(5.7)	$	3,850.0
TOTAL COMMON SHAREHOLDER’S EQUITY – DECEMBER 31, 2022	$	1,558.2	$	2,354.7	$	(8.6)	$	3,904.3
Capital Contribution from Parent	100.0						100.0
Net Income			47.6				47.6
Other Comprehensive Loss					(0.6)		(0.6)
TOTAL COMMON SHAREHOLDER’S EQUITY – MARCH 31, 2023	1,658.2		2,402.3		(9.2)		4,051.3
Capital Contribution from Parent	175.3						175.3
Return of Capital to Parent	(4.3)						(4.3)
Net Income			109.1				109.1
Other Comprehensive Income					3.2		3.2
TOTAL COMMON SHAREHOLDER’S EQUITY – JUNE 30, 2023	1,829.2		2,511.4		(6.0)		4,334.6
Capital Contribution from Parent	250.5						250.5
Net Income			125.5				125.5
Other Comprehensive Loss					(0.1)		(0.1)
TOTAL COMMON SHAREHOLDER’S EQUITY – SEPTEMBER 30, 2023	$	2,079.7	$	2,636.9	$	(6.1)	$	4,710.5
See Condensed Notes to Condensed Financial Statements of Registrants beginning on page 114.

58

AEP TEXAS INC. AND SUBSIDIARIES

CONDENSED CONSOLIDATED BALANCE SHEETS

ASSETS

September 30, 2023 and December 31, 2022

(in millions)

(Unaudited)

	September 30,		December 31,
	2023		2022
CURRENT ASSETS
Cash and Cash Equivalents	$	0.1	$	0.1
Restricted Cash (September 30, 2023 and December 31, 2022 Amounts Include $46.9 and $32.7, Respectively, Related to Transition Funding and Restoration Funding)	46.9		32.7
Advances to Affiliates	49.0		6.9
Accounts Receivable:
Customers	209.6		150.9
Affiliated Companies	20.1		11.9
Accrued Unbilled Revenues	106.6		91.4
Miscellaneous	0.7		0.2
Allowance for Uncollectible Accounts	(5.0)		(4.2)
Total Accounts Receivable	332.0		250.2
Materials and Supplies	170.9		138.8
Prepayments and Other Current Assets	25.9		18.2
TOTAL CURRENT ASSETS	624.8		446.9
PROPERTY, PLANT AND EQUIPMENT
Electric:
Transmission	6,579.9		6,301.5
Distribution	5,694.5		5,312.8
Other Property, Plant and Equipment	1,119.6		1,022.8
Construction Work in Progress	1,053.9		805.2
Total Property, Plant and Equipment	14,447.9		13,442.3
Accumulated Depreciation and Amortization	1,857.1		1,760.7
TOTAL PROPERTY, PLANT AND EQUIPMENT – NET	12,590.8		11,681.6
OTHER NONCURRENT ASSETS
Regulatory Assets	307.7		298.3
Securitized Assets (September 30, 2023 and December 31, 2022 Amounts Include $225.5 and $286.4, Respectively, Related to Transition Funding and Restoration Funding)	225.5		286.4
Deferred Charges and Other Noncurrent Assets	208.9		179.0
TOTAL OTHER NONCURRENT ASSETS	742.1		763.7
TOTAL ASSETS	$	13,957.7	$	12,892.2
See Condensed Notes to Condensed Financial Statements of Registrants beginning on page 114.

59

AEP TEXAS INC. AND SUBSIDIARIES

CONDENSED CONSOLIDATED BALANCE SHEETS

LIABILITIES AND COMMON SHAREHOLDER’S EQUITY

September 30, 2023 and December 31, 2022

(in millions)

(Unaudited)

	September 30,		December 31,
	2023		2022
CURRENT LIABILITIES
Advances from Affiliates	$	—	$	96.5
Accounts Payable:
General	249.3		331.0
Affiliated Companies	31.5		34.7
Long-term Debt Due Within One Year – Nonaffiliated (September 30, 2023 and December 31, 2022 Amounts Include $94.9 and $93.5, Respectively, Related to Transition Funding and Restoration Funding)	94.9		278.5
Accrued Taxes	139.6		95.5
Accrued Interest (September 30, 2023 and December 31, 2022 Amounts Include $2 and $2.2, Respectively, Related to Transition Funding and Restoration Funding)	81.4		48.3
Obligations Under Operating Leases	30.2		28.6
Other Current Liabilities	153.9		130.7
TOTAL CURRENT LIABILITIES	780.8		1,043.8
NONCURRENT LIABILITIES
Long-term Debt – Nonaffiliated (September 30, 2023 and December 31, 2022 Amounts Include $165.1 and $221, Respectively, Related to Transition Funding and Restoration Funding)	5,831.8		5,379.3
Deferred Income Taxes	1,220.8		1,144.2
Regulatory Liabilities and Deferred Investment Tax Credits	1,256.7		1,259.6
Obligations Under Operating Leases	54.6		67.8
Deferred Credits and Other Noncurrent Liabilities	102.5		93.2
TOTAL NONCURRENT LIABILITIES	8,466.4		7,944.1
TOTAL LIABILITIES	9,247.2		8,987.9
Rate Matters (Note 4)
Commitments and Contingencies (Note 5)
COMMON SHAREHOLDER’S EQUITY
Paid-in Capital	2,079.7		1,558.2
Retained Earnings	2,636.9		2,354.7
Accumulated Other Comprehensive Income (Loss)	(6.1)		(8.6)
TOTAL COMMON SHAREHOLDER’S EQUITY	4,710.5		3,904.3
TOTAL LIABILITIES AND COMMON SHAREHOLDER’S EQUITY	$	13,957.7	$	12,892.2
See Condensed Notes to Condensed Financial Statements of Registrants beginning on page 114.

60

AEP TEXAS INC. AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

For the Nine Months Ended September 30, 2023 and 2022

(in millions)

(Unaudited)

	Nine Months Ended September 30,
	2023		2022
OPERATING ACTIVITIES
Net Income	$	282.2	$	253.2
Adjustments to Reconcile Net Income to Net Cash Flows from Operating Activities:
Depreciation and Amortization	351.5		342.7
Deferred Income Taxes	64.2		35.1
Allowance for Equity Funds Used During Construction	(19.4)		(13.2)
Mark-to-Market of Risk Management Contracts	—		(0.2)
Change in Other Noncurrent Assets	(118.0)		(48.4)
Change in Other Noncurrent Liabilities	26.7		49.2
Changes in Certain Components of Working Capital:
Accounts Receivable, Net	(81.8)		(57.5)
Materials and Supplies	(32.1)		(39.9)
Accounts Payable	0.7		16.0
Accrued Taxes, Net	39.7		39.4
Other Current Assets	(0.7)		1.0
Other Current Liabilities	(9.9)		12.2
Net Cash Flows from Operating Activities	503.1		589.6
INVESTING ACTIVITIES
Construction Expenditures	(1,175.1)		(949.8)
Change in Advances to Affiliates, Net	(42.1)		(129.4)
Other Investing Activities	42.2		26.7
Net Cash Flows Used for Investing Activities	(1,175.0)		(1,052.5)
FINANCING ACTIVITIES
Capital Contribution from Parent	525.8		1.8
Return of Capital to Parent	(4.3)		—
Issuance of Long-term Debt – Nonaffiliated	505.4		1,188.7
Change in Advances from Affiliates, Net	(96.5)		(26.9)
Retirement of Long-term Debt – Nonaffiliated	(240.0)		(678.6)
Principal Payments for Finance Lease Obligations	(5.5)		(5.1)
Other Financing Activities	1.2		0.3
Net Cash Flows from Financing Activities	686.1		480.2
Net Increase in Cash, Cash Equivalents and Restricted Cash	14.2		17.3
Cash, Cash Equivalents and Restricted Cash at Beginning of Period	32.8		30.5
Cash, Cash Equivalents and Restricted Cash at End of Period	$	47.0	$	47.8
SUPPLEMENTARY INFORMATION
Cash Paid for Interest, Net of Capitalized Amounts	$	135.9	$	121.1
Net Cash Paid for Income Taxes	4.3		10.0
Noncash Acquisitions Under Finance Leases	3.7		4.1
Construction Expenditures Included in Current Liabilities as of September 30,	153.6		156.0
See Condensed Notes to Condensed Financial Statements of Registrants beginning on page 114.

61

AEP TRANSMISSION COMPANY, LLC AND SUBSIDIARIES

MANAGEMENT’S NARRATIVE DISCUSSION AND ANALYSIS OF RESULTS OF OPERATIONS

RESULTS OF OPERATIONS

Summary of Investment in Transmission Assets for AEPTCo

	As of September 30,
	2023		2022
	(in millions)
Plant In Service	$	13,638.0	$	12,223.9
Construction Work in Progress	1,902.1		1,652.2
Accumulated Depreciation and Amortization	1,221.2		966.5
Total Transmission Property, Net	$	14,318.9	$	12,909.6

AEP Transmission Company, LLC and Subsidiaries
Reconciliation of 2022 to 2023 Net Income
(in millions)
	Three Months Ended  September 30,		Nine Months Ended  September 30,
2022 Net Income	$	152.7	$	426.6
Changes in Transmission Revenues:
Transmission Revenues	44.2		165.9
Total Change in Transmission Revenues	44.2		165.9
Changes in Expenses and Other:
Other Operation and Maintenance	7.0		4.6
Depreciation and Amortization	(12.2)		(35.0)
Taxes Other Than Income Taxes	(5.1)		(13.6)
Interest Income	0.9		4.7
Allowance for Equity Funds Used During Construction	2.4		11.0
Interest Expense	(8.9)		(27.8)
Total Change in Expenses and Other	(15.9)		(56.1)
Income Tax Expense	(1.8)		(18.8)
2023 Net Income	$	179.2	$	517.6

Third Quarter of 2023 Compared to Third Quarter of 2022

The major component of the increase in transmission revenues, which consists of wholesale sales to affiliates and nonaffiliates, was as follows:

•Transmission Revenues increased $44 million primarily due to continued investment in transmission assets.

Expenses and Other changed between years as follows:

•Other Operation and Maintenance expenses decreased $7 million primarily due to the following:

•A $5 million decrease due to cancelled capital projects in 2022.

•A $3 million decrease in employee-related expenses.

62

•Depreciation and Amortization expenses increased $12 million primarily due to a higher depreciable base.

•Taxes Other Than Income Taxes increased $5 million primarily due to higher property taxes driven by increased transmission investment.

•Interest Expense increased $9 million due to higher long-term debt balances and interest rates.

Nine Months Ended September 30, 2023 Compared to Nine Months Ended September 30, 2022

The major components of the increase in transmission revenues, which consists of wholesale sales to affiliates and nonaffiliates, were as follows:

•Transmission Revenues increased $166 million primarily due to the following:

•A $127 million increase due to continued investment in transmission assets.

•A $33 million increase due to affiliated transmission formula rate true-up activity. This increase was offset in Other Operation and Maintenance expenses across the other Registrant Subsidiaries.

•A $6 million increase due to nonaffiliated transmission formula rate true-up activity.

Expenses and Other and Income Tax Expense changed between years as follows:

•Depreciation and Amortization expenses increased $35 million primarily due to a higher depreciable base.

•Taxes Other Than Income Taxes increased $14 million primarily due to higher property taxes driven by increased transmission investment.

•Allowance for Equity Funds Used During Construction increased $11 million primarily due to higher CWIP and AFUDC equity rates.

•Interest Expense increased $28 million primarily due to higher long-term debt balances and interest rates.

•Income Tax Expense increased $19 million primarily due to an increase in pretax book income.

63

AEP TRANSMISSION COMPANY, LLC AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF INCOME

For the Three and Nine Months Ended September 30, 2023 and 2022

(in millions)

(Unaudited)

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2023		2022		2023		2022
REVENUES
Transmission Revenues	$	93.8	$	89.1	$	274.0	$	261.7
Sales to AEP Affiliates	374.7		340.6		1,097.9		999.5
Provision for Refund – Affiliated	(4.8)		(9.3)		(17.9)		(65.7)
Provision for Refund – Nonaffiliated	(1.0)		(1.9)		(4.8)		(12.2)
TOTAL REVENUES	462.7		418.5		1,349.2		1,183.3
EXPENSES
Other Operation	31.6		39.6		87.0		94.7
Maintenance	5.1		4.1		14.3		11.2
Depreciation and Amortization	99.6		87.4		291.2		256.2
Taxes Other Than Income Taxes	73.8		68.7		216.6		203.0
TOTAL EXPENSES	210.1		199.8		609.1		565.1
OPERATING INCOME	252.6		218.7		740.1		618.2
Other Income (Expense):
Interest Income - Affiliated	1.6		0.7		5.7		1.0
Allowance for Equity Funds Used During Construction	22.7		20.3		62.2		51.2
Interest Expense	(51.6)		(42.7)		(147.5)		(119.7)
INCOME BEFORE INCOME TAX EXPENSE	225.3		197.0		660.5		550.7
Income Tax Expense	46.1		44.3		142.9		124.1
NET INCOME	$	179.2	$	152.7	$	517.6	$	426.6
AEPTCo is wholly-owned by AEP Transmission Holdco.
See Condensed Notes to Condensed Financial Statements of Registrants beginning on page 114.

64

AEP TRANSMISSION COMPANY, LLC AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN MEMBER’S EQUITY

For the Nine Months Ended September 30, 2023 and 2022

(in millions)

(Unaudited)

	Paid-in Capital		Retained Earnings		Total
TOTAL MEMBER'S EQUITY – DECEMBER 31, 2021	$	2,949.6	$	2,426.5	$	5,376.1
Dividends Paid to Member			(40.0)		(40.0)
Net Income			155.4		155.4
TOTAL MEMBER'S EQUITY – MARCH 31, 2022	2,949.6		2,541.9		5,491.5
Capital Contribution from Member	2.8				2.8
Dividends Paid to Member			(50.0)		(50.0)
Net Income			118.5		118.5
TOTAL MEMBER'S EQUITY – JUNE 30, 2022	2,952.4		2,610.4		5,562.8
Capital Contribution from Member	61.4				61.4
Dividends Paid to Member			(40.0)		(40.0)
Net Income			152.7		152.7
TOTAL MEMBER'S EQUITY – SEPTEMBER 30, 2022	$	3,013.8	$	2,723.1	$	5,736.9
TOTAL MEMBER'S EQUITY – DECEMBER 31, 2022	$	3,022.3	$	2,850.7	$	5,873.0
Capital Contribution from Member	25.0				25.0
Dividends Paid to Member			(55.0)		(55.0)
Net Income			162.7		162.7
TOTAL MEMBER'S EQUITY – MARCH 31, 2023	3,047.3		2,958.4		6,005.7
Return of Capital to Member	(8.6)				(8.6)
Dividends Paid to Member			(30.0)		(30.0)
Net Income			175.7		175.7
TOTAL MEMBER'S EQUITY – JUNE 30, 2023	3,038.7		3,104.1		6,142.8
Capital Contribution from Member	2.9				2.9
Dividends Paid to Member			(30.0)		(30.0)
Net Income			179.2		179.2
TOTAL MEMBER'S EQUITY – SEPTEMBER 30, 2023	$	3,041.6	$	3,253.3	$	6,294.9
See Condensed Notes to Condensed Financial Statements of Registrants beginning on page 114.

65

AEP TRANSMISSION COMPANY, LLC AND SUBSIDIARIES

CONDENSED CONSOLIDATED BALANCE SHEETS

ASSETS

September 30, 2023 and December 31, 2022

(in millions)

(Unaudited)

	September 30,		December 31,
	2023		2022
CURRENT ASSETS
Advances to Affiliates	$	90.6	$	4.4
Accounts Receivable:
Customers	80.4		46.9
Affiliated Companies	123.1		119.5
Total Accounts Receivable	203.5		166.4
Materials and Supplies	0.3		10.7
Prepayments and Other Current Assets	4.1		7.2
TOTAL CURRENT ASSETS	298.5		188.7
TRANSMISSION PROPERTY
Transmission Property	13,140.5		12,335.4
Other Property, Plant and Equipment	497.5		476.8
Construction Work in Progress	1,902.1		1,554.7
Total Transmission Property	15,540.1		14,366.9
Accumulated Depreciation and Amortization	1,221.2		1,027.0
TOTAL TRANSMISSION PROPERTY – NET	14,318.9		13,339.9
OTHER NONCURRENT ASSETS
Regulatory Assets	4.4		7.2
Deferred Property Taxes	82.2		266.6
Deferred Charges and Other Noncurrent Assets	8.0		11.8
TOTAL OTHER NONCURRENT ASSETS	94.6		285.6
TOTAL ASSETS	$	14,712.0	$	13,814.2
See Condensed Notes to Condensed Financial Statements of Registrants beginning on page 114.

66

AEP TRANSMISSION COMPANY, LLC AND SUBSIDIARIES

CONDENSED CONSOLIDATED BALANCE SHEETS

LIABILITIES AND MEMBER’S EQUITY

September 30, 2023 and December 31, 2022

(Unaudited)

	September 30,		December 31,
	2023		2022
	(in millions)
CURRENT LIABILITIES
Advances from Affiliates	$	116.8	$	229.3
Accounts Payable:
General	336.1		427.8
Affiliated Companies	96.1		82.7
Long-term Debt Due Within One Year – Nonaffiliated	60.0		60.0
Accrued Taxes	323.5		529.8
Accrued Interest	56.6		28.8
Obligations Under Operating Leases	1.3		1.3
Other Current Liabilities	12.8		8.3
TOTAL CURRENT LIABILITIES	1,003.2		1,368.0
NONCURRENT LIABILITIES
Long-term Debt – Nonaffiliated	5,413.7		4,722.8
Deferred Income Taxes	1,139.1		1,056.5
Regulatory Liabilities	784.5		723.3
Obligations Under Operating Leases	1.6		1.5
Deferred Credits and Other Noncurrent Liabilities	75.0		69.1
TOTAL NONCURRENT LIABILITIES	7,413.9		6,573.2
TOTAL LIABILITIES	8,417.1		7,941.2
Rate Matters (Note 4)
Commitments and Contingencies (Note 5)
MEMBER’S EQUITY
Paid-in Capital	3,041.6		3,022.3
Retained Earnings	3,253.3		2,850.7
TOTAL MEMBER’S EQUITY	6,294.9		5,873.0
TOTAL LIABILITIES AND MEMBER’S EQUITY	$	14,712.0	$	13,814.2
See Condensed Notes to Condensed Financial Statements of Registrants beginning on page 114.

67

AEP TRANSMISSION COMPANY, LLC AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

For the Nine Months Ended September 30, 2023 and 2022

(in millions)

(Unaudited)

	Nine Months Ended September 30,
	2023		2022
OPERATING ACTIVITIES
Net Income	$	517.6	$	426.6
Adjustments to Reconcile Net Income to Net Cash Flows from Operating Activities:
Depreciation and Amortization	291.2		256.2
Deferred Income Taxes	64.2		60.6
Allowance for Equity Funds Used During Construction	(62.2)		(51.2)
Property Taxes	184.4		170.0
Change in Other Noncurrent Assets	5.8		4.0
Change in Other Noncurrent Liabilities	7.7		55.0
Changes in Certain Components of Working Capital:
Accounts Receivable, Net	(37.1)		(66.4)
Materials and Supplies	10.4		(2.4)
Accounts Payable	25.0		53.1
Accrued Taxes, Net	(202.2)		(194.0)
Other Current Assets	(1.0)		(1.2)
Other Current Liabilities	21.7		27.2
Net Cash Flows from Operating Activities	825.5		737.5
INVESTING ACTIVITIES
Construction Expenditures	(1,224.9)		(1,059.3)
Change in Advances to Affiliates, Net	(86.2)		(84.1)
Other Investing Activities	4.8		(5.3)
Net Cash Flows Used for Investing Activities	(1,306.3)		(1,148.7)
FINANCING ACTIVITIES
Capital Contribution from Member	27.9		64.2
Return of Capital to Member	(8.6)		—
Issuance of Long-term Debt – Nonaffiliated	689.0		540.9
Change in Advances from Affiliates, Net	(112.5)		(63.9)
Dividends Paid to Member	(115.0)		(130.0)
Net Cash Flows from Financing Activities	480.8		411.2
Net Change in Cash and Cash Equivalents	—		—
Cash and Cash Equivalents at Beginning of Period	—		—
Cash and Cash Equivalents at End of Period	$	—	$	—
SUPPLEMENTARY INFORMATION
Cash Paid for Interest, Net of Capitalized Amounts	$	116.9	$	88.6
Net Cash Paid for Income Taxes	55.0		53.2
Construction Expenditures Included in Current Liabilities as of September 30,	219.2		240.5
See Condensed Notes to Condensed Financial Statements of Registrants beginning on page 114.

68

APPALACHIAN POWER COMPANY AND SUBSIDIARIES

MANAGEMENT’S NARRATIVE DISCUSSION AND ANALYSIS OF RESULTS OF OPERATIONS

RESULTS OF OPERATIONS

KWh Sales/Degree Days

Summary of KWh Energy Sales

	Three Months Ended		Nine Months Ended
	September 30,		September 30,
	2023	2022	2023	2022
	(in millions of KWhs)
Retail:
Residential	2,481	2,553	7,527	8,308
Commercial	1,537	1,566	4,286	4,545
Industrial	2,229	2,211	6,473	6,655
Miscellaneous	205	206	595	624
Total Retail	6,452	6,536	18,881	20,132
Wholesale	691	644	1,694	1,269
Total KWhs	7,143	7,180	20,575	21,401

Heating degree days and cooling degree days are metrics commonly used in the utility industry as a measure of the impact of weather on revenues.

Summary of Heating and Cooling Degree Days

	Three Months Ended		Nine Months Ended
	September 30,		September 30,
	2023	2022	2023	2022
	(in degree days)
Actual – Heating (a)	—	4	928	1,372
Normal – Heating (b)	2	2	1,410	1,410
Actual – Cooling (c)	873	876	1,106	1,299
Normal – Cooling (b)	837	832	1,222	1,210

(a)Heating degree days are calculated on a 55 degree temperature base.

(b)Normal Heating/Cooling represents the thirty-year average of degree days.

(c)Cooling degree days are calculated on a 65 degree temperature base.

69

Appalachian Power Company and Subsidiaries
Reconciliation of 2022 to 2023 Net Income
(in millions)
	Three Months Ended  September 30,		Nine Months Ended  September 30,
2022 Net Income	$	92.7	$	303.1
Changes in Gross Margin:
Retail Margins	46.5		79.7
Margins from Off-system Sales	(4.2)		(1.5)
Transmission Revenues	3.9		6.5
Other Revenues	1.5		(5.1)
Total Change in Gross Margin	47.7		79.6
Changes in Expenses and Other:
Other Operation and Maintenance	(10.9)		(63.5)
Asset Impairments and Other Related Charges - Coal Fired Generation	24.9		24.9
Establishment of 2017-2019 Virginia Triennial Review Regulatory Asset	(37.0)		(37.0)
Depreciation and Amortization	(0.8)		6.2
Taxes Other Than Income Taxes	(2.0)		(5.5)
Interest Income	(1.8)		(0.8)
Allowance for Equity Funds Used During Construction	1.4		1.9
Non-Service Cost Components of Net Periodic Benefit Cost	0.8		2.6
Interest Expense	(6.8)		(29.6)
Total Change in Expenses and Other	(32.2)		(100.8)
Income Tax Expense	(16.3)		(34.6)
2023 Net Income	$	91.9	$	247.3

Third Quarter of 2023 Compared to Third Quarter of 2022

The major components of the increase in Gross Margin, defined as revenues less the related direct cost of fuel, including consumption of chemicals and emissions allowances, and purchased electricity were as follows:

•Retail Margins increased $47 million primarily due to the following:

•A $19 million increase due to rider revenues in Virginia and West Virginia. This increase was partially offset in other expense items below.

•A $12 million increase in deferred fuel primarily related to the timing of recoverable PJM expenses. This increase was offset in Other Operation and Maintenance expenses below.

•An $8 million increase due to lower customer refunds related to Tax Reform. This increase was offset in Income Tax Expense below.

•A $7 million increase due to a base rate increase in Virginia implemented in October 2022 following the Virginia Supreme Court remand. This increase was partially offset in Other Operations and Maintenance expenses below.

•A $4 million increase due to the prior year amortization of costs recovered through Virginia’s environmental rate adjustment clause. This increase was offset in other expense items below.

70

Expenses and Other and Income Tax Expense changed between years as follows:

•Other Operation and Maintenance expenses increased $11 million primarily due to the following:

•A $7 million increase due to the amortization of the regulatory asset in accordance with the August 2022 Virginia Supreme Court opinion related to under-earnings during the 2017-2019 Triennial Review. This increase was offset in Retail Margins above.

•A $7 million increase in transmission expenses primarily due to an increase in recoverable PJM expenses. This increase was partially offset in Retail Margins above.

•A $2 million increase in distribution expenses primarily due to storm restoration costs.

•A $2 million increase in renewable energy credits and compliance expenses associated with the Virginia Clean Economy Act. This increase was offset in Retail Margins above.

These increases were partially offset by:

•A $9 million decrease due to an increase in proceeds received for insurance policy settlements.

•Asset Impairments and Other Related Charges - Coal Fired Generation decreased $25 million due to the prior year write-off of a regulatory asset in accordance with the August 2022 Virginia Supreme Court opinion related to the 2017-2019 Triennial Review.

•Establishment of 2017-2019 Virginia Triennial Review Regulatory Asset decreased $37 million due to the prior year establishment of a regulatory asset in accordance with the August 2022 Virginia Supreme Court opinion and resulting under-earning during the 2017-2019 Triennial Review.

•Interest Expense increased $7 million primarily due to higher long-term debt balances and interest rates.

•Income Tax Expense increased $16 million primarily due to the following:

•A $9 million increase in state taxes.

•A $3 million increase due to an increase in pretax book income.

•A $2 million increase due to a decrease in amortization of Excess ADIT.

Nine Months Ended September 30, 2023 Compared to Nine Months Ended September 30, 2022

The major components of the increase in Gross Margin, defined as revenues less the related direct cost of fuel, including consumption of chemicals and emissions allowances, and purchased electricity were as follows:

•Retail Margins increased $80 million primarily due to the following:

•A $44 million increase due to rider revenues in Virginia and West Virginia. This increase was partially offset in other expense items below.

•A $25 million increase due to lower customer refunds related to Tax Reform. This increase was offset in Income Tax Expense below.

•A $24 million increase in deferred fuel primarily related to the timing of recoverable PJM expenses. This increase was partially offset in Other Operation and Maintenance expenses below.

•A $19 million increase due to a base rate increase in Virginia implemented in October 2022 following the Virginia Supreme Court remand. This increase was partially offset in Other Operation and Maintenance expenses below.

•A $13 million increase due to the prior year amortization of costs recovered through Virginia’s environmental rate adjustment clause. This increase was offset in other expense items below.

•An $8 million increase in weather-normalized margins primarily driven by increases in the residential class.

These increases were partially offset by:

•A $63 million decrease in weather-related usage primarily driven by a 32% decrease in heating degree days and a 15% decrease in cooling degree days.

•Transmission Revenues increased $7 million primarily due to increased transmission investment.

•Other Revenues decreased $5 million primarily due to pole attachment revenue.

71

Expenses and Other and Income Tax Expense changed between years as follows:

•Other Operation and Maintenance expenses increased $64 million primarily due to the following:

•A $21 million increase due to the amortization of the regulatory asset in accordance with the August 2022 Virginia Supreme Court opinion related to under-earnings during the 2017-2019 Triennial Review. This increase was offset in Retail Margins above.

•A $17 million increase in distribution expenses primarily due to storm restoration costs.

•A $14 million increase due to gains from the sale of land in 2022.

•A $9 million increase in transmission expenses primarily due to the following:

•A $5 million increase in transmission formula rate true-up activity. This increase was partially offset in Retail Margins above.

•A $4 million increase in vegetation management expenses.

•An $8 million increase in accounts receivable factoring expenses as a result of increased interest rates.

•A $6 million increase in renewable energy credits and compliance expenses associated with the Virginia Clean Economy Act. This increase was offset in Retail Margins above.

These increases were partially offset by:

•An $11 million decrease in employee-related expenses.

•A $3 million decrease due to an increase in proceeds received for insurance policy settlements.

•Asset Impairments and Other Related Charges - Coal Fired Generation decreased $25 million due to a prior year write-off of a regulatory asset in accordance with the August 2022 Virginia Supreme Court opinion related to the 2017-2019 Triennial Review.

•Establishment of 2017-2019 Virginia Triennial Review Regulatory Asset decreased $37 million due to a prior year establishment of a regulatory asset in accordance with the August 2022 Virginia Supreme Court opinion and resulting under-earning during the 2017-2019 Triennial Review.

•Depreciation and Amortization expenses decreased $6 million primarily due to the following:

•A $21 million decrease due to the implementation of updated Virginia depreciation rates in 2023.

This decrease was partially offset by:

•A $16 million increase due to a higher depreciable base.

•Taxes Other Than Income Taxes expenses increased $6 million due to an increase in Virginia state minimum taxes primarily due to an increased projected minimum tax liability.

•Interest Expense increased $30 million primarily due to higher long-term debt balances and interest rates.

•Income Tax Expense increased $35 million primarily due to the following:

•A $19 million decrease in amortization of Excess ADIT. This decrease was partially offset in Retail Margins above.

•An $11 million increase due to unfavorable discrete adjustments in 2023.

•A $10 million increase in state taxes.

These increases were partially offset by:

•A $7 million decrease due to an increase in flow through depreciation expense.

72

APPALACHIAN POWER COMPANY AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF INCOME

For the Three and Nine Months Ended September 30, 2023 and 2022

(in millions)

(Unaudited)

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2023		2022		2023		2022
REVENUES
Electric Generation, Transmission and Distribution	$	896.0	$	818.4	$	2,573.0	$	2,370.4
Sales to AEP Affiliates	62.5		67.6		193.2		187.6
Other Revenues	3.3		2.9		9.8		11.8
TOTAL REVENUES	961.8		888.9		2,776.0		2,569.8
EXPENSES
Purchased Electricity, Fuel and Other Consumables Used for Electric Generation	343.2		318.0		960.8		834.2
Other Operation	187.9		182.0		569.6		514.0
Maintenance	74.3		69.3		222.5		214.6
Asset Impairments and Other Related Charges - Coal Fired Generation	—		24.9		—		24.9
Establishment of 2017-2019 Virginia Triennial Review Regulatory Asset	—		(37.0)		—		(37.0)
Depreciation and Amortization	143.7		142.9		424.8		431.0
Taxes Other Than Income Taxes	43.5		41.5		126.5		121.0
TOTAL EXPENSES	792.6		741.6		2,304.2		2,102.7
OPERATING INCOME	169.2		147.3		471.8		467.1
Other Income (Expense):
Interest Income	0.8		2.6		2.2		3.0
Allowance for Equity Funds Used During Construction	3.6		2.2		8.7		6.8
Non-Service Cost Components of Net Periodic Benefit Cost	8.1		7.3		24.4		21.8
Interest Expense	(68.5)		(61.7)		(200.7)		(171.1)
INCOME BEFORE INCOME TAX EXPENSE	113.2		97.7		306.4		327.6
Income Tax Expense	21.3		5.0		59.1		24.5
NET INCOME	$	91.9	$	92.7	$	247.3	$	303.1
The common stock of APCo is wholly-owned by Parent.
See Condensed Notes to Condensed Financial Statements of Registrants beginning on page 114.

73

APPALACHIAN POWER COMPANY AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS)

For the Three and Nine Months Ended September 30, 2023 and 2022

(in millions)

(Unaudited)

	Three Months Ended September 30,				Nine Months Ended September 30,
	2023		2022		2023		2022
Net Income	$	91.9	$	92.7	$	247.3	$	303.1
OTHER COMPREHENSIVE LOSS, NET OF TAXES
Cash Flow Hedges, Net of Tax of $(0.1) and $(0.1) for the Three Months Ended September 30, 2023 and 2022, Respectively, and $(0.2) and $(0.2) for the Nine Months Ended September 30, 2023 and 2022, Respectively	(0.2)		(0.2)		(0.6)		(0.6)
Amortization of Pension and OPEB Deferred Costs, Net of Tax of $(0.2) and $(0.3) for the Three Months Ended September 30, 2023 and 2022, Respectively, and $(0.6) and $(0.9) for the Nine Months Ended September 30, 2023 and 2022, Respectively	(0.7)		(1.1)		(2.3)		(3.2)
TOTAL OTHER COMPREHENSIVE LOSS	(0.9)		(1.3)		(2.9)		(3.8)
TOTAL COMPREHENSIVE INCOME	$	91.0	$	91.4	$	244.4	$	299.3
See Condensed Notes to Condensed Financial Statements of Registrants beginning on page 114.

74

APPALACHIAN POWER COMPANY AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN

COMMON SHAREHOLDER’S EQUITY

For the Nine Months Ended September 30, 2023 and 2022

(in millions)

(Unaudited)

	Common Stock		Paid-in Capital		Retained Earnings		Accumulated Other Comprehensive Income (Loss)		Total
TOTAL COMMON SHAREHOLDER'S EQUITY - DECEMBER 31, 2021	$	260.4	$	1,828.7	$	2,534.4	$	24.4	$	4,647.9
Common Stock Dividends					(18.8)				(18.8)
Net Income					120.2				120.2
Other Comprehensive Loss							(1.3)		(1.3)
TOTAL COMMON SHAREHOLDER'S EQUITY - MARCH 31, 2022	260.4		1,828.7		2,635.8		23.1		4,748.0
Capital Contribution from Parent			2.8						2.8
Common Stock Dividends					(18.7)				(18.7)
Net Income					90.2				90.2
Other Comprehensive Loss							(1.2)		(1.2)
TOTAL COMMON SHAREHOLDER'S EQUITY - JUNE 30, 2022	260.4		1,831.5		2,707.3		21.9		4,821.1
Capital Contribution from Parent			1.5						1.5
Net Income					92.7				92.7
Other Comprehensive Loss							(1.3)		(1.3)
TOTAL COMMON SHAREHOLDER'S EQUITY - SEPTEMBER 30, 2022	$	260.4	$	1,833.0	$	2,800.0	$	20.6	$	4,914.0
TOTAL COMMON SHAREHOLDER'S EQUITY - DECEMBER 31, 2022	$	260.4	$	1,828.7	$	2,891.1	$	(4.8)	$	4,975.4
Net Income					112.5				112.5
Other Comprehensive Loss							(1.0)		(1.0)
TOTAL COMMON SHAREHOLDER'S EQUITY - MARCH 31, 2023	260.4		1,828.7		3,003.6		(5.8)		5,086.9
Capital Contribution from Parent			4.3						4.3
Net Income					42.9				42.9
Other Comprehensive Loss							(1.0)		(1.0)
TOTAL COMMON SHAREHOLDER'S EQUITY - JUNE 30, 2023	260.4		1,833.0		3,046.5		(6.8)		5,133.1
Capital Contribution from Parent			2.2						2.2
Net Income					91.9				91.9
Other Comprehensive Loss							(0.9)		(0.9)
TOTAL COMMON SHAREHOLDER'S EQUITY - SEPTEMBER 30, 2023	$	260.4	$	1,835.2	$	3,138.4	$	(7.7)	$	5,226.3
See Condensed Notes to Condensed Financial Statements of Registrants beginning on page 114.

75

APPALACHIAN POWER COMPANY AND SUBSIDIARIES

CONDENSED CONSOLIDATED BALANCE SHEETS

ASSETS

September 30, 2023 and December 31, 2022

(in millions)

(Unaudited)

	September 30,		December 31,
	2023		2022
CURRENT ASSETS
Cash and Cash Equivalents	$	4.5	$	7.5
Restricted Cash for Securitized Funding	6.9		14.4
Advances to Affiliates	19.3		19.8
Accounts Receivable:
Customers	142.9		168.9
Affiliated Companies	91.7		94.0
Accrued Unbilled Revenues	41.9		91.3
Miscellaneous	0.2		0.3
Allowance for Uncollectible Accounts	(1.7)		(1.7)
Total Accounts Receivable	275.0		352.8
Fuel	266.5		158.9
Materials and Supplies	137.5		130.6
Risk Management Assets	46.4		69.1
Regulatory Asset for Under-Recovered Fuel Costs	442.0		473.1
Prepayments and Other Current Assets	33.7		33.4
TOTAL CURRENT ASSETS	1,231.8		1,259.6
PROPERTY, PLANT AND EQUIPMENT
Electric:
Generation	6,919.7		6,776.8
Transmission	4,588.4		4,482.8
Distribution	5,126.8		4,933.0
Other Property, Plant and Equipment	933.7		883.3
Construction Work in Progress	877.9		705.3
Total Property, Plant and Equipment	18,446.5		17,781.2
Accumulated Depreciation and Amortization	5,621.4		5,402.0
TOTAL PROPERTY, PLANT AND EQUIPMENT – NET	12,825.1		12,379.2
OTHER NONCURRENT ASSETS
Regulatory Assets	978.8		1,058.6
Securitized Assets	140.0		159.6
Employee Benefits and Pension Assets	166.5		152.9
Operating Lease Assets	64.9		73.6
Deferred Charges and Other Noncurrent Assets	102.6		138.7
TOTAL OTHER NONCURRENT ASSETS	1,452.8		1,583.4
TOTAL ASSETS	$	15,509.7	$	15,222.2
See Condensed Notes to Condensed Financial Statements of Registrants beginning on page 114.

76

APPALACHIAN POWER COMPANY AND SUBSIDIARIES

CONDENSED CONSOLIDATED BALANCE SHEETS

LIABILITIES AND COMMON SHAREHOLDER’S EQUITY

September 30, 2023 and December 31, 2022

(Unaudited)

	September 30,		December 31,
	2023		2022
	(in millions)
CURRENT LIABILITIES
Advances from Affiliates	$	202.5	$	182.2
Accounts Payable:
General	321.8		451.2
Affiliated Companies	116.6		142.7
Long-term Debt Due Within One Year – Nonaffiliated	538.8		251.8
Risk Management Liabilities	1.8		3.6
Customer Deposits	77.6		75.1
Accrued Taxes	82.4		101.0
Accrued Interest	85.5		57.9
Obligations Under Operating Leases	14.0		15.0
Other Current Liabilities	103.3		109.7
TOTAL CURRENT LIABILITIES	1,544.3		1,390.2
NONCURRENT LIABILITIES
Long-term Debt – Nonaffiliated	5,048.5		5,158.7
Deferred Income Taxes	2,029.6		1,992.2
Regulatory Liabilities and Deferred Investment Tax Credits	1,100.5		1,143.6
Asset Retirement Obligations	423.3		419.2
Employee Benefits and Pension Obligations	34.1		34.2
Obligations Under Operating Leases	51.4		59.1
Deferred Credits and Other Noncurrent Liabilities	51.7		49.6
TOTAL NONCURRENT LIABILITIES	8,739.1		8,856.6
TOTAL LIABILITIES	10,283.4		10,246.8
Rate Matters (Note 4)
Commitments and Contingencies (Note 5)
COMMON SHAREHOLDER’S EQUITY
Common Stock – No Par Value:
Authorized – 30,000,000 Shares
Outstanding – 13,499,500 Shares	260.4		260.4
Paid-in Capital	1,835.2		1,828.7
Retained Earnings	3,138.4		2,891.1
Accumulated Other Comprehensive Income (Loss)	(7.7)		(4.8)
TOTAL COMMON SHAREHOLDER’S EQUITY	5,226.3		4,975.4
TOTAL LIABILITIES AND COMMON SHAREHOLDER’S EQUITY	$	15,509.7	$	15,222.2
See Condensed Notes to Condensed Financial Statements of Registrants beginning on page 114.

77

APPALACHIAN POWER COMPANY AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

For the Nine Months Ended September 30, 2023 and 2022

(in millions)

(Unaudited)

	Nine Months Ended September 30,
	2023		2022
OPERATING ACTIVITIES
Net Income	$	247.3	$	303.1
Adjustments to Reconcile Net Income to Net Cash Flows from Operating Activities:
Depreciation and Amortization	424.8		431.0
Deferred Income Taxes	5.2		70.7
Asset Impairments and Other Related Charges - Coal Fired Generation	—		24.9
Allowance for Equity Funds Used During Construction	(8.7)		(6.8)
Mark-to-Market of Risk Management Contracts	21.7		(65.6)
Deferred Fuel Over/Under-Recovery, Net	108.2		(400.2)
Establishment of 2017-2019 Virginia Triennial Review Regulatory Asset	—		(37.0)
Change in Other Noncurrent Assets	24.4		(15.2)
Change in Other Noncurrent Liabilities	(29.9)		39.7
Changes in Certain Components of Working Capital:
Accounts Receivable, Net	80.2		68.7
Fuel, Materials and Supplies	(114.0)		(61.7)
Margin Deposits	(3.0)		65.8
Accounts Payable	(129.5)		141.4
Accrued Taxes, Net	(12.4)		(98.9)
Other Current Assets	(3.5)		(4.2)
Other Current Liabilities	(0.6)		42.2
Net Cash Flows from Operating Activities	610.2		497.9
INVESTING ACTIVITIES
Construction Expenditures	(813.4)		(707.4)
Change in Advances to Affiliates, Net	0.5		(161.3)
Other Investing Activities	(2.9)		34.9
Net Cash Flows Used for Investing Activities	(815.8)		(833.8)
FINANCING ACTIVITIES
Capital Contribution from Parent	6.5		4.3
Issuance of Long-term Debt – Nonaffiliated	200.0		698.2
Change in Advances from Affiliates, Net	20.3		(199.3)
Retirement of Long-term Debt – Nonaffiliated	(26.5)		(130.4)
Principal Payments for Finance Lease Obligations	(6.2)		(5.9)
Dividends Paid on Common Stock	—		(37.5)
Other Financing Activities	1.0		0.5
Net Cash Flows from Financing Activities	195.1		329.9
Net Decrease in Cash, Cash Equivalents and Restricted Cash for Securitized Funding	(10.5)		(6.0)
Cash, Cash Equivalents and Restricted Cash for Securitized Funding at Beginning of Period	21.9		20.1
Cash, Cash Equivalents and Restricted Cash for Securitized Funding at End of Period	$	11.4	$	14.1
SUPPLEMENTARY INFORMATION
Cash Paid for Interest, Net of Capitalized Amounts	$	166.6	$	128.3
Net Cash Paid for Income Taxes	40.3		14.2
Noncash Acquisitions Under Finance Leases	4.1		1.0
Construction Expenditures Included in Current Liabilities as of September 30,	138.7		160.4
See Condensed Notes to Condensed Financial Statements of Registrants beginning on page 114.

78

INDIANA MICHIGAN POWER COMPANY AND SUBSIDIARIES

MANAGEMENT’S NARRATIVE DISCUSSION AND ANALYSIS OF RESULTS OF OPERATIONS

RESULTS OF OPERATIONS

KWh Sales/Degree Days

Summary of KWh Energy Sales

	Three Months Ended		Nine Months Ended
	September 30,		September 30,
	2023	2022	2023	2022
	(in millions of KWhs)
Retail:
Residential	1,421	1,532	3,998	4,320
Commercial	1,360	1,326	3,756	3,610
Industrial	1,876	1,926	5,501	5,638
Miscellaneous	12	12	39	39
Total Retail	4,669	4,796	13,294	13,607
Wholesale	1,246	1,707	4,210	4,892
Total KWhs	5,915	6,503	17,504	18,499

Heating degree days and cooling degree days are metrics commonly used in the utility industry as a measure of the impact of weather on revenues.

Summary of Heating and Cooling Degree Days

	Three Months Ended		Nine Months Ended
	September 30,		September 30,
	2023	2022	2023	2022
	(in degree days)
Actual – Heating (a)	—	17	1,914	2,525
Normal – Heating (b)	7	8	2,430	2,421
Actual – Cooling (c)	516	590	722	934
Normal – Cooling (b)	588	580	857	842

(a)Heating degree days are calculated on a 55 degree temperature base.

(b)Normal Heating/Cooling represents the thirty-year average of degree days.

(c)Cooling degree days are calculated on a 65 degree temperature base.

79

Indiana Michigan Power Company and Subsidiaries
Reconciliation of 2022 to 2023 Net Income
(in millions)
	Three Months Ended  September 30,		Nine Months Ended  September 30,
2022 Net Income	$	94.1	$	250.8
Changes in Gross Margin:
Retail Margins	5.4		55.6
Margins from Off-system Sales	(14.7)		8.9
Transmission Revenues	(1.3)		(13.9)
Other Revenues	3.7		6.5
Total Change in Gross Margin	(6.9)		57.1
Changes in Expenses and Other:
Other Operation and Maintenance	(7.9)		(63.1)
Depreciation and Amortization	14.9		47.3
Taxes Other Than Income Taxes	0.1		13.8
Other Income	2.1		0.7
Non-Service Cost Components of Net Periodic Benefit Cost	1.4		4.6
Interest Expense	(1.8)		(9.5)
Total Change in Expenses and Other	8.8		(6.2)
Income Tax Expense	(3.0)		(31.1)
2023 Net Income	$	93.0	$	270.6

Third Quarter of 2023 Compared to Third Quarter of 2022

The major components of the decrease in Gross Margin, defined as revenues less the related direct cost of fuel, including consumption of chemicals and emissions allowances, and purchased electricity were as follows:

•Retail Margins increased $5 million primarily due to the following:

•A $14 million increase in weather-normalized retail margins in the commercial and industrial classes.

•An $8 million increase due to rider revenues. This increase was partially offset in other expense items below.

These increases were partially offset by:

•A $10 million decrease in deferred fuel primarily due to the timing of recoverable PJM expenses. This decrease was offset in other expense items below.

•A $7 million decrease in weather-related usage primarily due to a 13% decrease in cooling degree days.

•Margins from Off-system Sales decreased $15 million primarily due to Rockport Plant, Unit 2 merchant operations activity.

Expenses and Other changed between years as follows:

•Other Operation and Maintenance expenses increased $8 million primarily due to the following:

•A $12 million increase in Demand Side Management expenses. This increase was offset in Retail Margins above.

This increase was partially offset by:

•A $4 million decrease in employee-related expenses.

80

•Depreciation and Amortization expenses decreased $15 million primarily due to the expiration of the Rockport Plant, Unit 2 lease in December 2022, partially offset by an increase in depreciation expense due to the acquisition of Rockport Plant, Unit 2 at the end of the lease.

Nine Months Ended September 30, 2023 Compared to Nine Months Ended September 30, 2022

The major components of the increase in Gross Margin, defined as revenues less the related direct cost of fuel, including consumption of chemicals and emissions allowances, and purchased electricity were as follows:

•Retail Margins increased $56 million primarily due to the following:

•A $39 million increase in weather-normalized margins in all retail classes, partially offset by a decrease in the wholesale class.

•A $25 million increase due to a base rate revenue increase in Indiana and rider increases. This increase was partially offset in other expense items below.

•A $21 million increase due to a reduction in provision for refund, partially offset by lower wholesale true-ups.

These increases were partially offset by:

•A $39 million decrease in weather-related usage primarily due to a 23% decrease in cooling degree days and a 24% decrease in heating degree days.

•Margins from Off-system Sales increased $9 million primarily due to Rockport Plant, Unit 2 merchant operations activity and estimated PJM performance incentives for Rockport Plant, Unit 2 merchant operations related to winter storm Elliott in December 2022.

•Transmission Revenues decreased $14 million primarily due to transmission formula rate true-up activity.

•Other Revenues increased $7 million primarily due to an increase in barging revenues by River Transportation Division (RTD). This increase in barging revenues was partially offset in Other Operation and Maintenance expenses below.

Expenses and Other and Income Tax Expense changed between years as follows:

•Other Operation and Maintenance expenses increased $63 million primarily due to the following:

•A $29 million increase in Demand Side Management expenses. This increase was offset in Retail Margins above.

•A $10 million increase in Non-Utility operation expenses due to an increase in RTD expenses and merchant operation expenses. The RTD expenses are offset in Other Revenues above.

•A $10 million increase in nuclear expenses at Cook Plant primarily due to refueling outage expenses.

•A $10 million increase in transmission expenses primarily due to a $7 million increase in transmission formula rate true-up activity and a $3 million increase in recoverable PJM expenses. The recoverable PJM expenses were offset in Gross Margin above.

•A $9 million increase due to a decreased Nuclear Electric Insurance Limited distribution in 2023.

These increases were partially offset by:

•An $11 million decrease in employee-related expenses.

•Depreciation and Amortization expenses decreased $47 million primarily due to the expiration of the Rockport Plant, Unit 2 lease in December 2022, partially offset by an increase in depreciation expense due to the acquisition of Rockport Plant, Unit 2 at the end of the lease and an increase in depreciable base.

•Taxes Other Than Income Taxes decreased $14 million primarily due to the repeal of the Indiana Utility Receipts Tax in July 2022. This decrease was partially offset in Retail Margins above.

•Interest Expense increased $10 million primarily due to higher long-term debt balances and interest rates.

•Income Tax Expense increased $31 million primarily due to the following:

•A $17 million increase due to a decrease in amortization of Excess ADIT.

•An $11 million increase due to an increase in pretax book income.

•A $4 million increase due to an increase in state taxes.

81

INDIANA MICHIGAN POWER COMPANY AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF INCOME

For the Three and Nine Months Ended September 30, 2023 and 2022

(in millions)

(Unaudited)

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2023		2022		2023		2022
REVENUES
Electric Generation, Transmission and Distribution	$	656.1	$	695.7	$	1,879.3	$	1,912.1
Sales to AEP Affiliates	0.6		2.0		3.7		11.1
Other Revenues – Affiliated	15.4		13.3		45.8		38.4
Other Revenues – Nonaffiliated	4.2		4.4		9.7		10.0
TOTAL REVENUES	676.3		715.4		1,938.5		1,971.6
EXPENSES
Purchased Electricity, Fuel and Other Consumables Used for Electric Generation	129.3		150.6		322.4		367.2
Purchased Electricity from AEP Affiliates	57.0		67.9		139.2		184.6
Other Operation	168.9		162.4		508.7		450.9
Maintenance	57.3		55.9		173.0		167.7
Depreciation and Amortization	116.7		131.6		352.9		400.2
Taxes Other Than Income Taxes	22.3		22.4		62.4		76.2
TOTAL EXPENSES	551.5		590.8		1,558.6		1,646.8
OPERATING INCOME	124.8		124.6		379.9		324.8
Other Income (Expense):
Other Income	4.5		2.4		8.1		7.4
Non-Service Cost Components of Net Periodic Benefit Cost	7.7		6.3		23.4		18.8
Interest Expense	(33.0)		(31.2)		(102.0)		(92.5)
INCOME BEFORE INCOME TAX EXPENSE	104.0		102.1		309.4		258.5
Income Tax Expense	11.0		8.0		38.8		7.7
NET INCOME	$	93.0	$	94.1	$	270.6	$	250.8
The common stock of I&M is wholly-owned by Parent.
See Condensed Notes to Condensed Financial Statements of Registrants beginning on page 114.

82

INDIANA MICHIGAN POWER COMPANY AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS)

For the Three and Nine Months Ended September 30, 2023 and 2022

(in millions)

(Unaudited)

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2023		2022		2023		2022
Net Income	$	93.0	$	94.1	$	270.6	$	250.8
OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAXES
Cash Flow Hedges, Net of Tax of $0.1 and $0.1 for the Three Months Ended September 30, 2023 and 2022, Respectively, and $(0.1) and $0.3 for the Nine Months Ended September 30, 2023 and 2022, Respectively	0.1		0.4		(0.5)		1.2
Amortization of Pension and OPEB Deferred Costs, Net of Tax of $0 and $(0.1) for the Three Months Ended September 30, 2023 and 2022, Respectively, and $(0.6) and $(0.1) for the Nine Months Ended September 30, 2023 and 2022, Respectively	(0.2)		(0.1)		(2.4)		(0.3)
TOTAL OTHER COMPREHENSIVE INCOME (LOSS)	(0.1)		0.3		(2.9)		0.9
TOTAL COMPREHENSIVE INCOME	$	92.9	$	94.4	$	267.7	$	251.7
See Condensed Notes to Condensed Financial Statements of Registrants beginning on page 114.

83

INDIANA MICHIGAN POWER COMPANY AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN

COMMON SHAREHOLDER’S EQUITY

For the Nine Months Ended September 30, 2023 and 2022

(in millions)

(Unaudited)

	Common Stock		Paid-in Capital		Retained Earnings		Accumulated Other Comprehensive Income (Loss)		Total
TOTAL COMMON SHAREHOLDER’S EQUITY - DECEMBER 31, 2021	$	56.6	$	980.9	$	1,748.5	$	(1.3)	$	2,784.7
Common Stock Dividends					(25.0)				(25.0)
Net Income					89.5				89.5
Other Comprehensive Income							0.3		0.3
TOTAL COMMON SHAREHOLDER'S EQUITY -MARCH 31, 2022	56.6		980.9		1,813.0		(1.0)		2,849.5
Capital Contribution from Parent			1.3						1.3
Common Stock Dividends					(25.0)				(25.0)
Net Income					67.2				67.2
Other Comprehensive Income							0.3		0.3
TOTAL COMMON SHAREHOLDER'S EQUITY - JUNE 30, 2022	56.6		982.2		1,855.2		(0.7)		2,893.3
Capital Contribution from Parent			0.6						0.6
Common Stock Dividends					(20.0)				(20.0)
Net Income					94.1				94.1
Other Comprehensive Income							0.3		0.3
TOTAL COMMON SHAREHOLDER'S EQUITY - SEPTEMBER 30, 2022	$	56.6	$	982.8	$	1,929.3	$	(0.4)	$	2,968.3
TOTAL COMMON SHAREHOLDER’S EQUITY - DECEMBER 31, 2022	$	56.6	$	988.8	$	1,963.2	$	(0.3)	$	3,008.3
Common Stock Dividends					(31.2)				(31.2)
Net Income					102.8				102.8
Other Comprehensive Loss							(2.6)		(2.6)
TOTAL COMMON SHAREHOLDER'S EQUITY - MARCH 31, 2023	56.6		988.8		2,034.8		(2.9)		3,077.3
Capital Contribution from Parent			0.1						0.1
Common Stock Dividends					(31.3)				(31.3)
Net Income					74.8				74.8
Other Comprehensive Loss							(0.2)		(0.2)
TOTAL COMMON SHAREHOLDER'S EQUITY - JUNE 30, 2023	56.6		988.9		2,078.3		(3.1)		3,120.7
Capital Contribution from Parent			1.6						1.6
Common Stock Dividends					(75.0)				(75.0)
Net Income					93.0				93.0
Other Comprehensive Loss							(0.1)		(0.1)
TOTAL COMMON SHAREHOLDER'S EQUITY - SEPTEMBER 30, 2023	$	56.6	$	990.5	$	2,096.3	$	(3.2)	$	3,140.2
See Condensed Notes to Condensed Financial Statements of Registrants beginning on page 114.

84

INDIANA MICHIGAN POWER COMPANY AND SUBSIDIARIES

CONDENSED CONSOLIDATED BALANCE SHEETS

ASSETS

September 30, 2023 and December 31, 2022

(in millions)

(Unaudited)

	September 30,		December 31,
	2023		2022
CURRENT ASSETS
Cash and Cash Equivalents	$	2.7	$	4.2
Advances to Affiliates	21.2		23.0
Accounts Receivable:
Customers	46.2		96.6
Affiliated Companies	69.4		104.0
Accrued Unbilled Revenues	3.9		0.6
Miscellaneous	5.3		4.7
Allowance for Uncollectible Accounts	—		(0.1)
Total Accounts Receivable	124.8		205.8
Fuel	78.6		46.5
Materials and Supplies	198.7		188.1
Risk Management Assets	15.8		15.2
Regulatory Asset for Under-Recovered Fuel Costs	13.3		47.1
Prepayments and Other Current Assets	43.9		41.9
TOTAL CURRENT ASSETS	499.0		571.8
PROPERTY, PLANT AND EQUIPMENT
Electric:
Generation	5,608.1		5,585.1
Transmission	1,881.2		1,842.2
Distribution	3,171.8		3,024.7
Other Property, Plant and Equipment (Including Coal Mining and Nuclear Fuel)	834.3		839.3
Construction Work in Progress	353.2		253.0
Total Property, Plant and Equipment	11,848.6		11,544.3
Accumulated Depreciation, Depletion and Amortization	4,312.9		4,132.8
TOTAL PROPERTY, PLANT AND EQUIPMENT – NET	7,535.7		7,411.5
OTHER NONCURRENT ASSETS
Regulatory Assets	377.7		459.6
Spent Nuclear Fuel and Decommissioning Trusts	3,539.7		3,341.2
Operating Lease Assets	56.7		64.3
Deferred Charges and Other Noncurrent Assets	257.7		270.5
TOTAL OTHER NONCURRENT ASSETS	4,231.8		4,135.6
TOTAL ASSETS	$	12,266.5	$	12,118.9
See Condensed Notes to Condensed Financial Statements of Registrants beginning on page 114.

85

INDIANA MICHIGAN POWER COMPANY AND SUBSIDIARIES

CONDENSED CONSOLIDATED BALANCE SHEETS

LIABILITIES AND COMMON SHAREHOLDER’S EQUITY

September 30, 2023 and December 31, 2022

(dollars in millions)

(Unaudited)

	September 30,		December 31,
	2023		2022
CURRENT LIABILITIES
Advances from Affiliates	$	—	$	249.9
Accounts Payable:
General	177.6		173.4
Affiliated Companies	89.0		121.5
Long-term Debt Due Within One Year – Nonaffiliated    (September 30, 2023 and December 31, 2022 Amounts Include $59.5 and $89.6,    Respectively, Related to DCC Fuel)	61.8		341.8
Customer Deposits	54.6		48.6
Accrued Taxes	77.9		103.2
Accrued Interest	38.7		36.9
Obligations Under Operating Leases	16.8		16.0
Regulatory Liability for Over-Recovered Fuel Costs	19.1		—
Other Current Liabilities	88.5		105.8
TOTAL CURRENT LIABILITIES	624.0		1,197.1
NONCURRENT LIABILITIES
Long-term Debt – Nonaffiliated	3,381.8		2,919.0
Deferred Income Taxes	1,192.7		1,157.0
Regulatory Liabilities and Deferred Investment Tax Credits	1,758.1		1,702.2
Asset Retirement Obligations	2,083.6		2,027.6
Obligations Under Operating Leases	40.5		48.9
Deferred Credits and Other Noncurrent Liabilities	45.6		58.8
TOTAL NONCURRENT LIABILITIES	8,502.3		7,913.5
TOTAL LIABILITIES	9,126.3		9,110.6
Rate Matters (Note 4)
Commitments and Contingencies (Note 5)
COMMON SHAREHOLDER’S EQUITY
Common Stock – No Par Value:
Authorized – 2,500,000 Shares
Outstanding – 1,400,000 Shares	56.6		56.6
Paid-in Capital	990.5		988.8
Retained Earnings	2,096.3		1,963.2
Accumulated Other Comprehensive Income (Loss)	(3.2)		(0.3)
TOTAL COMMON SHAREHOLDER’S EQUITY	3,140.2		3,008.3
TOTAL LIABILITIES AND COMMON SHAREHOLDER’S EQUITY	$	12,266.5	$	12,118.9
See Condensed Notes to Condensed Financial Statements of Registrants beginning on page 114.

86

INDIANA MICHIGAN POWER COMPANY AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

For the Nine Months Ended September 30, 2023 and 2022

(in millions)

(Unaudited)

	Nine Months Ended September 30,
	2023		2022
OPERATING ACTIVITIES
Net Income	$	270.6	$	250.8
Adjustments to Reconcile Net Income to Net Cash Flows from Operating Activities:
Depreciation and Amortization	352.9		400.2
Deferred Income Taxes	(16.4)		(15.8)
Amortization (Deferral) of Incremental Nuclear Refueling Outage Expenses, Net	44.3		(35.2)
Allowance for Equity Funds Used During Construction	(6.6)		(7.9)
Mark-to-Market of Risk Management Contracts	(4.7)		(13.2)
Amortization of Nuclear Fuel	75.7		63.1
Deferred Fuel Over/Under-Recovery, Net	52.9		(20.5)
Change in Other Noncurrent Assets	3.1		12.5
Change in Other Noncurrent Liabilities	9.0		42.1
Changes in Certain Components of Working Capital:
Accounts Receivable, Net	82.5		5.3
Fuel, Materials and Supplies	(42.7)		3.1
Accounts Payable	(34.8)		19.6
Accrued Taxes, Net	(25.3)		(17.0)
Other Current Assets	(3.4)		19.3
Other Current Liabilities	(22.7)		(63.6)
Net Cash Flows from Operating Activities	734.4		642.8
INVESTING ACTIVITIES
Construction Expenditures	(418.4)		(407.4)
Change in Advances to Affiliates, Net	1.8		(1.1)
Purchases of Investment Securities	(2,182.8)		(1,854.8)
Sales of Investment Securities	2,139.3		1,818.4
Acquisitions of Nuclear Fuel	(60.9)		(91.9)
Other Investing Activities	4.9		8.0
Net Cash Flows Used for Investing Activities	(516.1)		(528.8)
FINANCING ACTIVITIES
Capital Contribution from Parent	1.7		1.9
Issuance of Long-term Debt – Nonaffiliated	494.8		72.8
Change in Advances from Affiliates, Net	(249.9)		11.6
Retirement of Long-term Debt – Nonaffiliated	(324.1)		(64.5)
Principal Payments for Finance Lease Obligations	(5.4)		(41.6)
Dividends Paid on Common Stock	(137.5)		(70.0)
Other Financing Activities	0.6		0.3
Net Cash Flows Used for Financing Activities	(219.8)		(89.5)
Net Increase (Decrease) in Cash and Cash Equivalents	(1.5)		24.5
Cash and Cash Equivalents at Beginning of Period	4.2		1.3
Cash and Cash Equivalents at End of Period	$	2.7	$	25.8
SUPPLEMENTARY INFORMATION
Cash Paid for Interest, Net of Capitalized Amounts	$	100.1	$	101.6
Net Cash Paid (Received) for Income Taxes	36.2		(4.1)
Noncash Acquisitions Under Finance Leases	3.6		0.8
Construction Expenditures Included in Current Liabilities as of September 30,	70.6		68.1
Acquisition of Nuclear Fuel Included in Current Liabilities as of September 30,	9.5		8.5
See Condensed Notes to Condensed Financial Statements of Registrants beginning on page 114.

87

OHIO POWER COMPANY AND SUBSIDIARIES

MANAGEMENT’S NARRATIVE DISCUSSION AND ANALYSIS OF RESULTS OF OPERATIONS

RESULTS OF OPERATIONS

KWh Sales/Degree Days

Summary of KWh Energy Sales

	Three Months Ended		Nine Months Ended
	September 30,		September 30,
	2023	2022	2023	2022
	(in millions of KWhs)
Retail:
Residential	3,761	3,954	10,323	11,146
Commercial	4,553	4,295	12,503	11,996
Industrial	3,536	3,561	10,456	10,688
Miscellaneous	24	25	78	79
Total Retail (a)	11,874	11,835	33,360	33,909
Wholesale (b)	485	587	1,366	1,723
Total KWhs	12,359	12,422	34,726	35,632

(a)Represents energy delivered to distribution customers.

(b)Primarily Ohio’s contractually obligated purchases of OVEC power sold to PJM.

Heating degree days and cooling degree days are metrics commonly used in the utility industry as a measure of the impact of weather on revenues.

Summary of Heating and Cooling Degree Days

	Three Months Ended		Nine Months Ended
	September 30,		September 30,
	2023	2022	2023	2022
	(in degree days)
Actual – Heating (a)	—	8	1,521	2,078
Normal – Heating (b)	4	5	2,080	2,077
Actual – Cooling (c)	625	755	809	1,115
Normal – Cooling (b)	697	688	1,005	989

(a)Heating degree days are calculated on a 55 degree temperature base.

(b)Normal Heating/Cooling represents the thirty-year average of degree days.

(c)Cooling degree days are calculated on a 65 degree temperature base.

88

Ohio Power Company and Subsidiaries
Reconciliation of 2022 to 2023 Net Income
(in millions)
	Three Months Ended  September 30,		Nine Months Ended  September 30,
2022 Net Income	$	71.9	$	229.9
Changes in Gross Margin:
Retail Margins	66.8		101.0
Margins from Off-system Sales	(5.5)		35.9
Transmission Revenues	2.9		4.0
Other Revenues	4.8		2.4
Total Change in Gross Margin	69.0		143.3
Changes in Expenses and Other:
Other Operation and Maintenance	(44.0)		(128.9)
Depreciation and Amortization	(10.6)		(7.8)
Taxes Other Than Income Taxes	(1.5)		(3.0)
Other Income	(0.1)		(0.6)
Allowance for Equity Funds Used During Construction	1.7		1.0
Non-Service Cost Components of Net Periodic Benefit Cost	0.9		2.9
Interest Expense	(4.1)		(8.1)
Total Change in Expenses and Other	(57.7)		(144.5)
Income Tax Expense	(2.7)		(1.7)
Equity Earnings of Unconsolidated Subsidiaries	—		(0.8)
2023 Net Income	$	80.5	$	226.2

Third Quarter of 2023 Compared to Third Quarter of 2022

The major components of the increase in Gross Margin, defined as revenues less the related direct cost of purchased electricity were as follows:

•Retail Margins increased $67 million primarily due to the following:

•A $43 million increase in revenue from rate riders. This increase was partially offset in Margins from Off-system Sales and other expense items below.

•A $23 million net increase in Basic Transmission Cost Rider revenues and recoverable PJM expenses. This increase was partially offset in Other Operation and Maintenance expenses below.

•A $9 million increase in weather-normalized margins primarily in the industrial and commercial classes.

These increases were partially offset by:

•A $9 million decrease in weather-related usage due to a 17% decrease in cooling degree days.

•Margins from Off-system Sales decreased $6 million due to the following:

•A $32 million decrease in Off-system sales at OVEC due to lower market prices and volume. This decrease was offset in Retail Margins above.

This decrease was partially offset by:

•A $26 million increase in deferrals of OVEC costs. This increase was offset in Retail Margins above.

89

Expenses and Other changed between years as follows:

•Other Operation and Maintenance expenses increased $44 million primarily due to the following:

•A $20 million increase related to an energy assistance program for qualified Ohio customers. This increase was offset in Retail Margins above.

•A $19 million increase in transmission expenses primarily due to an increase in recoverable PJM expense, This increase was offset in Retail Margins above.

•A $7 million increase in distribution expenses primarily related to vegetation management. This increase was offset in Retail Margins above.

•Depreciation and Amortization expenses increased $11 million primarily due to the following:

•A $17 million increase in depreciation expense primarily due to an increase in depreciable base.

This increase was partially offset by:

•A $9 million decrease in recoverable DIR expense. This decrease was offset in Retail Margins above.

Nine Months Ended September 30, 2023 Compared to Nine Months Ended September 30, 2022

The major components of the increase in Gross Margin, defined as revenues less the related direct cost of purchased electricity were as follows:

•Retail Margins increased $101 million primarily due to the following:

•An $86 million increase in revenue from rate riders. This increase was partially offset in Margins from Off-system Sales and other expense items below.

•A $57 million net increase in Basic Transmission Cost Rider revenues and recoverable PJM expenses. This increase was partially offset in Other Operation and Maintenance expenses below.

These increases were partially offset by:

•A $47 million decrease in weather-related usage due to a 27% decrease in heating degree days and a 28% decrease in cooling degree days.

•Margins from Off-system Sales increased $36 million due to the following:

•A $111 million increase in deferrals of OVEC costs. This increase was offset in Retail Margins above.

This increase was partially offset by:

•A $75 million decrease in Off-system sales at OVEC due to lower market prices and volume. This decrease was offset in Retail Margins above.

Expenses and Other changed between years as follows:

•Other Operation and Maintenance expenses increased $129 million primarily due to the following:

•A $68 million increase related to an energy assistance program for qualified Ohio customers. This increase was offset in Retail Margins above.

•A $41 million increase in transmission expenses primarily due to:

•A $33 million increase in recoverable PJM expenses. This increase was offset in Retail Margins above.

•An $11 million increase in transmission formula rate true-up activity.

•A $15 million increase in distribution expenses related to vegetation management. This increase was offset in Retail Margins above.

These increases were partially offset by:

•A $12 million decrease in employee-related expenses.

•Depreciation and Amortization expenses increased $8 million primarily due to the following:

•A $30 million increase in depreciation expense primarily due to an increase in depreciable base.

•A $5 million increase in smart grid depreciable expenses. This increase was offset in Retail Margins above.

These increases were partially offset by:

•A $30 million decrease in recoverable DIR expense. This decrease was offset in Retail Margins above.

•Interest Expense increased $8 million primarily due to the following:

•A $16 million increase primarily due to higher debt balances and interest rates.

This increase was partially offset by:

•A $6 million decrease due to an increase in AFUDC base.

90

OHIO POWER COMPANY AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF INCOME

For the Three and Nine Months Ended September 30, 2023 and 2022

(in millions)

(Unaudited)

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2023		2022		2023		2022
REVENUES
Electricity, Transmission and Distribution	$	978.7	$	1,015.2	$	2,869.3	$	2,656.6
Sales to AEP Affiliates	7.8		4.0		23.6		11.6
Other Revenues	3.0		2.1		10.3		6.0
TOTAL REVENUES	989.5		1,021.3		2,903.2		2,674.2
EXPENSES
Purchased Electricity for Resale	260.7		399.5		920.9		875.0
Purchased Electricity from AEP Affiliates	38.0		—		49.6		9.8
Other Operation	296.9		267.3		836.1		728.2
Maintenance	62.2		47.8		157.7		136.7
Depreciation and Amortization	81.3		70.7		224.7		216.9
Taxes Other Than Income Taxes	132.5		131.0		382.0		379.0
TOTAL EXPENSES	871.6		916.3		2,571.0		2,345.6
OPERATING INCOME	117.9		105.0		332.2		328.6
Other Income (Expense):
Other Income	0.1		0.2		0.4		1.0
Allowance for Equity Funds Used During Construction	5.6		3.9		11.3		10.3
Non-Service Cost Components of Net Periodic Benefit Cost	6.5		5.6		19.5		16.6
Interest Expense	(33.9)		(29.8)		(96.9)		(88.8)
INCOME BEFORE INCOME TAX EXPENSE AND EQUITY EARNINGS	96.2		84.9		266.5		267.7
Income Tax Expense	15.7		13.0		40.3		38.6
Equity Earnings of Unconsolidated Subsidiaries	—		—		—		0.8
NET INCOME	$	80.5	$	71.9	$	226.2	$	229.9
The common stock of OPCo is wholly-owned by Parent.
See Condensed Notes to Condensed Financial Statements of Registrants beginning on page 114.

91

OHIO POWER COMPANY AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN

COMMON SHAREHOLDER’S EQUITY

For the Nine Months Ended September 30, 2023 and 2022

(in millions)

(Unaudited)

	Common Stock		Paid-in Capital		Retained Earnings		Total
TOTAL COMMON SHAREHOLDER’S EQUITY – DECEMBER 31, 2021	$	321.2	$	838.8	$	1,686.3	$	2,846.3
Common Stock Dividends					(15.0)		(15.0)
Net Income					83.2		83.2
TOTAL COMMON SHAREHOLDER’S EQUITY – MARCH 31, 2022	321.2		838.8		1,754.5		2,914.5
Capital Contribution from Parent			0.7				0.7
Common Stock Dividends					(15.0)		(15.0)
Net Income					74.8		74.8
TOTAL COMMON SHAREHOLDER’S EQUITY – JUNE 30, 2022	321.2		839.5		1,814.3		2,975.0
Capital Contribution from Parent			0.3				0.3
Common Stock Dividends					(15.0)		(15.0)
Net Income					71.9		71.9
TOTAL COMMON SHAREHOLDER’S EQUITY – SEPTEMBER 30, 2022	$	321.2	$	839.8	$	1,871.2	$	3,032.2
TOTAL COMMON SHAREHOLDER’S EQUITY – DECEMBER 31, 2022	$	321.2	$	837.8	$	1,929.1	$	3,088.1
Capital Contribution from Parent			50.0				50.0
Net Income					78.0		78.0
TOTAL COMMON SHAREHOLDER’S EQUITY – MARCH 31, 2023	321.2		887.8		2,007.1		3,216.1
Capital Contribution from Parent			125.0				125.0
Net Income					67.7		67.7
TOTAL COMMON SHAREHOLDER’S EQUITY – JUNE 30, 2023	321.2		1,012.8		2,074.8		3,408.8
Net Income					80.5		80.5
TOTAL COMMON SHAREHOLDER’S EQUITY – SEPTEMBER 30, 2023	$	321.2	$	1,012.8	$	2,155.3	$	3,489.3
See Condensed Notes to Condensed Financial Statements of Registrants beginning on page 114.

92

OHIO POWER COMPANY AND SUBSIDIARIES

CONDENSED CONSOLIDATED BALANCE SHEETS

ASSETS

September 30, 2023 and December 31, 2022

(in millions)

(Unaudited)

	September 30,		December 31,
	2023		2022
CURRENT ASSETS
Cash and Cash Equivalents	$	6.8	$	9.6
Accounts Receivable:
Customers	104.1		119.9
Affiliated Companies	129.3		100.9
Accrued Unbilled Revenues	2.9		17.8
Miscellaneous	1.6		0.1
Allowance for Uncollectible Accounts	0.1		(0.1)
Total Accounts Receivable	238.0		238.6
Materials and Supplies	151.8		109.5
Renewable Energy Credits	19.9		35.0
Prepayments and Other Current Assets	27.2		21.7
TOTAL CURRENT ASSETS	443.7		414.4
PROPERTY, PLANT AND EQUIPMENT
Electric:
Transmission	3,320.1		3,198.6
Distribution	6,718.3		6,450.3
Other Property, Plant and Equipment	1,071.5		1,051.4
Construction Work in Progress	720.6		474.3
Total Property, Plant and Equipment	11,830.5		11,174.6
Accumulated Depreciation and Amortization	2,670.5		2,565.3
TOTAL PROPERTY, PLANT AND EQUIPMENT – NET	9,160.0		8,609.3
OTHER NONCURRENT ASSETS
Regulatory Assets	413.2		327.3
Operating Lease Assets	68.9		73.8
Deferred Charges and Other Noncurrent Assets	262.7		578.3
TOTAL OTHER NONCURRENT ASSETS	744.8		979.4
TOTAL ASSETS	$	10,348.5	$	10,003.1
See Condensed Notes to Condensed Financial Statements of Registrants beginning on page 114.

93

OHIO POWER COMPANY AND SUBSIDIARIES

CONDENSED CONSOLIDATED BALANCE SHEETS

LIABILITIES AND COMMON SHAREHOLDER’S EQUITY

September 30, 2023 and December 31, 2022

(Unaudited)

	September 30,		December 31,
	2023		2022
	(in millions)
CURRENT LIABILITIES
Advances from Affiliates	$	113.3	$	172.9
Accounts Payable:
General	308.5		337.3
Affiliated Companies	151.0		126.1
Long-term Debt Due Within One Year – Nonaffiliated	—		0.1
Risk Management Liabilities	5.7		1.8
Customer Deposits	59.2		96.5
Accrued Taxes	370.9		733.1
Obligations Under Operating Leases	13.5		13.5
Other Current Liabilities	204.7		154.2
TOTAL CURRENT LIABILITIES	1,226.8		1,635.5
NONCURRENT LIABILITIES
Long-term Debt – Nonaffiliated	3,366.2		2,970.2
Long-term Risk Management Liabilities	45.9		37.9
Deferred Income Taxes	1,155.5		1,101.1
Regulatory Liabilities and Deferred Investment Tax Credits	976.8		1,044.0
Obligations Under Operating Leases	55.6		60.3
Deferred Credits and Other Noncurrent Liabilities	32.4		66.0
TOTAL NONCURRENT LIABILITIES	5,632.4		5,279.5
TOTAL LIABILITIES	6,859.2		6,915.0
Rate Matters (Note 4)
Commitments and Contingencies (Note 5)
COMMON SHAREHOLDER’S EQUITY
Common Stock –No Par Value:
Authorized – 40,000,000 Shares
Outstanding – 27,952,473 Shares	321.2		321.2
Paid-in Capital	1,012.8		837.8
Retained Earnings	2,155.3		1,929.1
TOTAL COMMON SHAREHOLDER’S EQUITY	3,489.3		3,088.1
TOTAL LIABILITIES AND COMMON SHAREHOLDER’S EQUITY	$	10,348.5	$	10,003.1
See Condensed Notes to Condensed Financial Statements of Registrants beginning on page 114.

94

OHIO POWER COMPANY AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

For the Nine Months Ended September 30, 2023 and 2022

(in millions)

(Unaudited)

	Nine Months Ended September 30,
	2023		2022
OPERATING ACTIVITIES
Net Income	$	226.2	$	229.9
Adjustments to Reconcile Net Income to Net Cash Flows from Operating Activities:
Depreciation and Amortization	224.7		216.9
Deferred Income Taxes	29.4		29.3
Allowance for Equity Funds Used During Construction	(11.3)		(10.3)
Mark-to-Market of Risk Management Contracts	11.6		(49.6)
Property Taxes	282.4		264.7
Change in Other Noncurrent Assets	(95.5)		(19.7)
Change in Other Noncurrent Liabilities	(47.7)		82.5
Changes in Certain Components of Working Capital:
Accounts Receivable, Net	4.3		(27.0)
Materials and Supplies	5.3		(11.6)
Accounts Payable	1.8		87.6
Customer Deposits	(37.3)		37.4
Accrued Taxes, Net	(367.3)		(344.5)
Other Current Assets	(2.3)		11.3
Other Current Liabilities	0.4		25.7
Net Cash Flows from Operating Activities	224.7		522.6
INVESTING ACTIVITIES
Construction Expenditures	(769.0)		(600.6)
Change in Advances to Affiliates, Net	—		42.0
Other Investing Activities	33.9		21.3
Net Cash Flows Used for Investing Activities	(735.1)		(537.3)
FINANCING ACTIVITIES
Capital Contribution from Parent	175.0		1.0
Issuance of Long-term Debt – Nonaffiliated	395.0		—
Change in Advances from Affiliates, Net	(59.6)		68.8
Retirement of Long-term Debt – Nonaffiliated	(0.6)		(0.1)
Principal Payments for Finance Lease Obligations	(3.7)		(3.6)
Dividends Paid on Common Stock	—		(45.0)
Other Financing Activities	1.5		0.8
Net Cash Flows from Financing Activities	507.6		21.9
Net Increase (Decrease) in Cash and Cash Equivalents	(2.8)		7.2
Cash and Cash Equivalents at Beginning of Period	9.6		3.0
Cash and Cash Equivalents at End of Period	$	6.8	$	10.2
SUPPLEMENTARY INFORMATION
Cash Paid for Interest, Net of Capitalized Amounts	$	76.5	$	75.8
Net Cash Paid for Income Taxes	16.0		24.2
Noncash Acquisitions Under Finance Leases	3.3		2.1
Construction Expenditures Included in Current Liabilities as of September 30,	99.6		108.3
See Condensed Notes to Condensed Financial Statements of Registrants beginning on page 114.

95

PUBLIC SERVICE COMPANY OF OKLAHOMA

MANAGEMENT’S NARRATIVE DISCUSSION AND ANALYSIS OF RESULTS OF OPERATIONS

RESULTS OF OPERATIONS

KWh Sales/Degree Days

Summary of KWh Energy Sales

	Three Months Ended		Nine Months Ended
	September 30,		September 30,
	2023	2022	2023	2022
	(in millions of KWhs)
Retail:
Residential	2,197	2,293	4,943	5,320
Commercial	1,539	1,547	3,934	3,976
Industrial	1,557	1,616	4,503	4,567
Miscellaneous	373	377	965	993
Total Retail	5,666	5,833	14,345	14,856
Wholesale	59	55	132	660
Total KWhs	5,725	5,888	14,477	15,516

Heating degree days and cooling degree days are metrics commonly used in the utility industry as a measure of the impact of weather on revenues.

Summary of Heating and Cooling Degree Days

	Three Months Ended		Nine Months Ended
	September 30,		September 30,
	2023	2022	2023	2022
	(in degree days)
Actual – Heating (a)	—	—	899	1,153
Normal – Heating (b)	—	—	1,100	1,085
Actual – Cooling (c)	1,554	1,678	2,202	2,475
Normal – Cooling (b)	1,425	1,407	2,102	2,074

(a)Heating degree days are calculated on a 55 degree temperature base.

(b)Normal Heating/Cooling represents the thirty-year average of degree days.

(c)Cooling degree days are calculated on a 65 degree temperature base.

96

Public Service Company of Oklahoma
Reconciliation of 2022 to 2023 Net Income
(in millions)
	Three Months Ended  September 30,		Nine Months Ended  September 30,
2022 Net Income	$	106.9	$	155.7
Changes in Gross Margin:
Retail Margins (a)	10.4		26.5
Transmission Revenues	1.1		3.0
Other Revenues	—		0.6
Total Change in Gross Margin	11.5		30.1
Changes in Expenses and Other:
Other Operation and Maintenance	18.3		22.8
Depreciation and Amortization	(2.3)		(15.1)
Taxes Other Than Income Taxes	(1.6)		(5.9)
Other Income	(0.3)		(1.8)
Non-Service Cost Components of Net Periodic Benefit Cost	0.5		1.3
Interest Expense	(3.1)		(14.9)
Total Change in Expenses and Other	11.5		(13.6)
Income Tax Benefit	9.5		15.9
2023 Net Income	$	139.4	$	188.1

(a)Includes firm wholesale sales to municipals and cooperatives.

Third Quarter of 2023 Compared to Third Quarter of 2022

The major components of the increase in Gross Margin, defined as revenues less the related direct cost of fuel, including consumption of chemicals and emissions allowances, and purchased electricity were as follows:

•Retail Margins increased $10 million primarily due to the following:

•A $28 million increase in base rate and rider revenues. This increase was partially offset in other expense items below.

This increase was partially offset by:

•A $10 million decrease due to an increase in PTC benefits provided to customers. This decrease was offset in Income Tax Benefit below.

•An $8 million decrease in weather-related usage primarily due to a 7% decrease in cooling degree days.

Expenses and Other and Income Tax Benefit changed between years as follows:

•Other Operation and Maintenance expenses decreased $18 million primarily due to the following:

•A $9 million decrease in transmission expenses primarily due to a $5 million decrease in recoverable SPP transmission expense and $4 million decrease in transmission formula rate true-up activity. The decrease in recoverable SPP transmission expense was offset in Retail Margins above.

•A $5 million decrease in distribution expenses primarily related to vegetation management.

•A $5 million decrease in employee-related expenses.

97

•Income Tax Benefit increased $10 million primarily due to a $13 million increase in PTCs, partially offset by a $5 million decrease due to an increase in pretax book income. The increase in PTCs was partially offset in Retail Margins above.

Nine Months Ended September 30, 2023 Compared to Nine Months Ended September 30, 2022

The major components of the increase in Gross Margin, defined as revenues less the related direct cost of fuel, including consumption of chemicals and emissions allowances, and purchased electricity were as follows:

•Retail Margins increased $27 million primarily due to the following:

•A $47 million increase in base rate and rider revenues. This increase was partially offset in other expense items below.

•An $11 million increase in fuel revenue due to increased carrying charges on fuel under-recovered balances.

These increases were partially offset by:

•A $19 million decrease in weather-related usage primarily due to an 11% decrease in cooling degree days and a 22% decrease in heating degree days.

•A $14 million decrease due to an increase in PTC benefits provided to customers. This decrease was offset in Income Tax Benefit below.

Expenses and Other and Income Tax Benefit changed between years as follows:

•Other Operation and Maintenance expenses decreased $23 million primarily due to the following:

•A $14 million decrease in transmission expenses due to a $21 million decrease in recoverable SPP transmission expense and $4 million decrease in transmission formula rate true-up activity, offset by an $11 million increase due to a change in rider recovery. The decrease in recoverable SPP transmission expense was offset in Retail Margins above.

•An $8 million decrease in employee-related expenses.

•A $6 million decrease due to the capitalization of previously expensed renewable generation pre-construction charges.

•Depreciation and Amortization expenses increased $15 million primarily due to a higher depreciable base.

•Taxes Other Than Income Taxes increased $6 million primarily due to increased property taxes driven by the investment in the NCWF and a new infrastructure fee implemented by the City of Tulsa in March 2022. This increase was partially offset in Retail Margins above.

•Interest Expense increased $15 million primarily due to higher long-term debt balances and higher interest rates.

•Income Tax Benefit increased $16 million primarily due to a $19 million increase in PTCs, partially offset by a $3 million decrease due to an increase in pretax book income. The increase in PTCs was partially offset in Retail Margins above.

98

PUBLIC SERVICE COMPANY OF OKLAHOMA

CONDENSED STATEMENTS OF INCOME

For the Three and Nine Months Ended September 30, 2023 and 2022

(in millions)

(Unaudited)

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2023		2022		2023		2022
REVENUES
Electric Generation, Transmission and Distribution	$	642.6	$	606.5	$	1,529.8	$	1,432.9
Sales to AEP Affiliates	0.2		0.7		1.0		2.1
Other Revenues	1.4		1.0		5.1		3.7
TOTAL REVENUES	644.2		608.2		1,535.9		1,438.7
EXPENSES
Purchased Electricity, Fuel and Other Consumables Used for Electric Generation	318.1		293.6		741.3		674.2
Other Operation	103.9		116.3		283.5		301.0
Maintenance	25.4		31.3		82.7		88.0
Depreciation and Amortization	61.8		59.5		187.8		172.7
Taxes Other Than Income Taxes	17.2		15.6		49.5		43.6
TOTAL EXPENSES	526.4		516.3		1,344.8		1,279.5
OPERATING INCOME	117.8		91.9		191.1		159.2
Other Income (Expense):
Other Income	2.7		3.0		6.7		8.5
Non-Service Cost Components of Net Periodic Benefit Cost	3.6		3.1		10.7		9.4
Interest Expense	(25.5)		(22.4)		(77.5)		(62.6)
INCOME BEFORE INCOME TAX BENEFIT	98.6		75.6		131.0		114.5
Income Tax Benefit	(40.8)		(31.3)		(57.1)		(41.2)
NET INCOME	$	139.4	$	106.9	$	188.1	$	155.7
The common stock of PSO is wholly-owned by Parent.
See Condensed Notes to Condensed Financial Statements of Registrants beginning on page 114.

99

PUBLIC SERVICE COMPANY OF OKLAHOMA

CONDENSED STATEMENTS OF COMPREHENSIVE INCOME (LOSS)

For the Three and Nine Months Ended September 30, 2023 and 2022

(in millions)

(Unaudited)

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2023		2022		2023		2022
Net Income	$	139.4	$	106.9	$	188.1	$	155.7
OTHER COMPREHENSIVE LOSS, NET OF TAXES
Cash Flow Hedges, Net of Tax of $0 and $0 for the Three Months Ended September 30, 2023 and 2022, Respectively, and $(0.4) and $0 for the Nine Months Ended September 30, 2023 and 2022, Respectively	—		—		(1.5)		—
TOTAL COMPREHENSIVE INCOME	$	139.4	$	106.9	$	186.6	$	155.7
See Condensed Notes to Condensed Financial Statements of Registrants beginning on page 114.

100

PUBLIC SERVICE COMPANY OF OKLAHOMA

CONDENSED STATEMENTS OF CHANGES IN

COMMON SHAREHOLDER’S EQUITY

For the Nine Months Ended September 30, 2023 and 2022

(in millions)

(Unaudited)

	Common Stock		Paid-in Capital		Retained Earnings		Accumulated Other Comprehensive Income (Loss)		Total
TOTAL COMMON SHAREHOLDER'S EQUITY – DECEMBER 31, 2021	$	157.2	$	1,039.0	$	1,095.4	$	—	$	2,291.6
Net Income					5.8				5.8
TOTAL COMMON SHAREHOLDER'S EQUITY – MARCH 31, 2022	157.2		1,039.0		1,101.2		—		2,297.4
Capital Contribution from Parent			2.2						2.2
Net Income					43.0				43.0
TOTAL COMMON SHAREHOLDER'S EQUITY – JUNE 30, 2022	157.2		1,041.2		1,144.2		—		2,342.6
Capital Contribution from Parent			1.1						1.1
Common Stock Dividends					(20.0)				(20.0)
Net Income					106.9				106.9
TOTAL COMMON SHAREHOLDER'S EQUITY – SEPTEMBER 30, 2022	$	157.2	$	1,042.3	$	1,231.1	$	—	$	2,430.6
TOTAL COMMON SHAREHOLDER'S EQUITY – DECEMBER 31, 2022	$	157.2	$	1,042.6	$	1,218.0	$	1.3	$	2,419.1
Common Stock Dividends					(17.5)				(17.5)
Net Loss					(2.3)				(2.3)
Other Comprehensive Loss							(1.5)		(1.5)
TOTAL COMMON SHAREHOLDER'S EQUITY – MARCH 31, 2023	157.2		1,042.6		1,198.2		(0.2)		2,397.8
Return of Capital to Parent			(2.5)						(2.5)
Net Income					51.0				51.0
TOTAL COMMON SHAREHOLDER'S EQUITY – JUNE 30, 2023	157.2		1,040.1		1,249.2		(0.2)		2,446.3
Capital Contribution from Parent			0.6						0.6
Common Stock Dividends					(17.5)				(17.5)
Net Income					139.4				139.4
TOTAL COMMON SHAREHOLDER'S EQUITY – SEPTEMBER 30, 2023	$	157.2	$	1,040.7	$	1,371.1	$	(0.2)	$	2,568.8
See Condensed Notes to Condensed Financial Statements of Registrants beginning on page 114.

101

PUBLIC SERVICE COMPANY OF OKLAHOMA

CONDENSED BALANCE SHEETS

ASSETS

September 30, 2023 and December 31, 2022

(in millions)

(Unaudited)

	September 30,		December 31,
	2023		2022
CURRENT ASSETS
Cash and Cash Equivalents	$	3.7	$	4.0
Advances to Affiliates	9.2		—
Accounts Receivable:
Customers	78.8		70.1
Affiliated Companies	31.9		52.2
Miscellaneous	0.5		0.8
Total Accounts Receivable	111.2		123.1
Fuel	20.5		11.6
Materials and Supplies	114.9		111.1
Risk Management Assets	28.2		25.3
Accrued Tax Benefits	61.3		16.1
Regulatory Asset for Under-Recovered Fuel Costs	168.2		178.7
Prepayments and Other Current Assets	35.2		21.6
TOTAL CURRENT ASSETS	552.4		491.5
PROPERTY, PLANT AND EQUIPMENT
Electric:
Generation	2,683.7		2,394.8
Transmission	1,197.1		1,164.4
Distribution	3,357.9		3,216.4
Other Property, Plant and Equipment	498.8		469.3
Construction Work in Progress	337.9		219.3
Total Property, Plant and Equipment	8,075.4		7,464.2
Accumulated Depreciation and Amortization	2,050.3		1,837.7
TOTAL PROPERTY, PLANT AND EQUIPMENT – NET	6,025.1		5,626.5
OTHER NONCURRENT ASSETS
Regulatory Assets	477.2		653.7
Employee Benefits and Pension Assets	71.4		67.3
Operating Lease Assets	114.0		106.1
Deferred Charges and Other Noncurrent Assets	32.1		20.8
TOTAL OTHER NONCURRENT ASSETS	694.7		847.9
TOTAL ASSETS	$	7,272.2	$	6,965.9
See Condensed Notes to Condensed Financial Statements of Registrants beginning on page 114.

102

PUBLIC SERVICE COMPANY OF OKLAHOMA

CONDENSED BALANCE SHEETS

LIABILITIES AND COMMON SHAREHOLDER’S EQUITY

September 30, 2023 and December 31, 2022

(Unaudited)

	September 30,		December 31,
	2023		2022
	(in millions)
CURRENT LIABILITIES
Advances from Affiliates	$	—	$	364.2
Accounts Payable:
General	233.3		202.9
Affiliated Companies	46.1		76.7
Long-term Debt Due Within One Year – Nonaffiliated	0.6		0.5
Customer Deposits	61.0		59.0
Accrued Taxes	64.4		28.7
Accrued Interest	25.9		18.2
Obligations Under Operating Leases	10.7		8.9
Other Current Liabilities	75.4		83.6
TOTAL CURRENT LIABILITIES	517.4		842.7
NONCURRENT LIABILITIES
Long-term Debt – Nonaffiliated	2,383.6		1,912.3
Deferred Income Taxes	797.5		788.6
Regulatory Liabilities and Deferred Investment Tax Credits	787.0		809.1
Asset Retirement Obligations	82.3		73.5
Obligations Under Operating Leases	106.6		99.3
Deferred Credits and Other Noncurrent Liabilities	29.0		21.3
TOTAL NONCURRENT LIABILITIES	4,186.0		3,704.1
TOTAL LIABILITIES	4,703.4		4,546.8
Rate Matters (Note 4)
Commitments and Contingencies (Note 5)
COMMON SHAREHOLDER’S EQUITY
Common Stock – Par Value – $15 Per Share:
Authorized – 11,000,000 Shares
Issued – 10,482,000 Shares
Outstanding – 9,013,000 Shares	157.2		157.2
Paid-in Capital	1,040.7		1,042.6
Retained Earnings	1,371.1		1,218.0
Accumulated Other Comprehensive Income (Loss)	(0.2)		1.3
TOTAL COMMON SHAREHOLDER’S EQUITY	2,568.8		2,419.1
TOTAL LIABILITIES AND COMMON SHAREHOLDER’S EQUITY	$	7,272.2	$	6,965.9
See Condensed Notes to Condensed Financial Statements of Registrants beginning on page 114.

103

PUBLIC SERVICE COMPANY OF OKLAHOMA

CONDENSED STATEMENTS OF CASH FLOWS

For the Nine Months Ended September 30, 2023 and 2022

(in millions)

(Unaudited)

	Nine Months Ended September 30,
	2023		2022
OPERATING ACTIVITIES
Net Income	$	188.1	$	155.7
Adjustments to Reconcile Net Income to Net Cash Flows from Operating Activities:
Depreciation and Amortization	187.8		172.7
Deferred Income Taxes	(13.6)		(20.0)
Mark-to-Market of Risk Management Contracts	(0.2)		(36.1)
Property Taxes	(14.0)		(12.2)
Deferred Fuel Over/Under-Recovery, Net	263.3		454.0
Change in Other Regulatory Assets	(66.1)		3.7
Change in Other Noncurrent Assets	(33.1)		(21.8)
Change in Other Noncurrent Liabilities	11.0		15.8
Changes in Certain Components of Working Capital:
Accounts Receivable, Net	11.9		(66.3)
Fuel, Materials and Supplies	(11.6)		(25.8)
Accounts Payable	(19.5)		150.8
Accrued Taxes, Net	(9.5)		(20.9)
Other Current Assets	(3.0)		(19.2)
Other Current Liabilities	(10.8)		11.0
Net Cash Flows from Operating Activities	480.7		741.4
INVESTING ACTIVITIES
Construction Expenditures	(401.1)		(322.6)
Change in Advances to Affiliates, Net	(9.2)		—
Acquisitions of Renewable Energy Facilities	(145.7)		(549.3)
Other Investing Activities	8.8		2.9
Net Cash Flows Used for Investing Activities	(547.2)		(869.0)
FINANCING ACTIVITIES
Capital Contribution from Parent	0.6		3.3
Return of Capital to Parent	(2.5)		—
Issuance of Long-term Debt – Nonaffiliated	469.8		499.7
Change in Advances from Affiliates, Net	(364.2)		151.2
Retirement of Long-term Debt – Nonaffiliated	(0.4)		(500.4)
Principal Payments for Finance Lease Obligations	(2.5)		(2.4)
Dividends Paid on Common Stock	(35.0)		(20.0)
Other Financing Activities	0.4		0.4
Net Cash Flows from Financing Activities	66.2		131.8
Net Increase (Decrease) in Cash and Cash Equivalents	(0.3)		4.2
Cash and Cash Equivalents at Beginning of Period	4.0		1.3
Cash and Cash Equivalents at End of Period	$	3.7	$	5.5
SUPPLEMENTARY INFORMATION
Cash Paid for Interest, Net of Capitalized Amounts	$	67.4	$	63.1
Net Cash Paid (Received) for Income Taxes	(1.6)		21.9
Noncash Acquisitions Under Finance Leases	1.9		1.7
Construction Expenditures Included in Current Liabilities as of September 30,	91.0		50.1
See Condensed Notes to Condensed Financial Statements of Registrants beginning on page 114.

104

SOUTHWESTERN ELECTRIC POWER COMPANY CONSOLIDATED

MANAGEMENT’S NARRATIVE DISCUSSION AND ANALYSIS OF RESULTS OF OPERATIONS

RESULTS OF OPERATIONS

KWh Sales/Degree Days

Summary of KWh Energy Sales

	Three Months Ended		Nine Months Ended
	September 30,		September 30,
	2023	2022	2023	2022
	(in millions of KWhs)
Retail:
Residential	2,180	2,019	4,902	5,157
Commercial	1,689	1,631	4,269	4,385
Industrial	1,313	1,367	3,876	3,876
Miscellaneous	17	17	53	55
Total Retail	5,199	5,034	13,100	13,473
Wholesale	1,668	1,744	4,226	5,312
Total KWhs	6,867	6,778	17,326	18,785

Heating degree days and cooling degree days are metrics commonly used in the utility industry as a measure of the impact of weather on revenues.

Summary of Heating and Cooling Degree Days

	Three Months Ended		Nine Months Ended
	September 30,		September 30,
	2023	2022	2023	2022
	(in degree days)
Actual – Heating (a)	—	—	413	704
Normal – Heating (b)	—	—	730	726
Actual – Cooling (c)	1,715	1,627	2,673	2,642
Normal – Cooling (b)	1,435	1,420	2,223	2,195

(a)Heating degree days are calculated on a 55 degree temperature base.

(b)Normal Heating/Cooling represents the thirty-year average of degree days.

(c)Cooling degree days are calculated on a 65 degree temperature base.

105

Reconciliation of 2022 to 2023
Earnings Attributable to SWEPCo Common Shareholder
(in millions)
	Three Months Ended  September 30,		Nine Months Ended  September 30,
2022 Earnings Attributable to Common Shareholder	$	139.4	$	260.2
Changes in Gross Margin:
Retail Margins (a)	24.2		23.0
Margins from Off-system Sales	(8.2)		(10.5)
Transmission Revenues	(1.9)		3.1
Other Revenues	(1.3)		(1.5)
Total Change in Gross Margin	12.8		14.1
Changes in Expenses and Other:
Other Operation and Maintenance	11.7		14.1
Depreciation and Amortization	(4.8)		(15.0)
Taxes Other Than Income Taxes	(2.0)		(9.5)
Interest Income	1.4		0.9
Allowance for Equity Funds Used During Construction	3.3		3.9
Non-Service Cost Components of Net Periodic Benefit Cost	0.2		0.8
Interest Expense	(6.9)		(5.2)
Total Change in Expenses and Other	2.9		(10.0)
Income Tax Benefit	3.9		14.7
Net Income Attributable to Noncontrolling Interest	(1.5)		0.1
2023 Earnings Attributable to Common Shareholder	$	157.5	$	279.1

(a)Includes firm wholesale sales to municipals and cooperatives.

Third Quarter of 2023 Compared to Third Quarter of 2022

The major components of the increase in Gross Margin, defined as revenues less the related direct cost of fuel, including consumption of chemicals and emissions allowances, and purchased electricity were as follows:

•Retail Margins increased $24 million primarily due to the following:

•A $23 million increase due to a base rate revenue increase in Louisiana and rider increases in Texas and Louisiana retail jurisdictions. These increases were partially offset in other expense items below.

•A $5 million increase in weather-related usage primarily due to a 5% increase in cooling degree days.

These increases were partially offset by:

•An $8 million decrease due to an increase in PTC benefits provided to customers. This decrease was offset in Income Tax Benefit.

•Margins from Off-System Sales decreased $8 million primarily due to reduced Turk Plant merchant sales.

Expenses and Other changed between years as follows:

•Other Operation and Maintenance expenses decreased $12 million primarily due to the following:

•A $9 million decrease in transmission expenses primarily due to a $4 million decrease in recoverable SPP transmission expenses and a $4 million decrease in transmission formula rate true-up activity. The decrease in SPP transmission expenses was offset in Retail Margins above.

106

•Depreciation and Amortization increased $5 million primarily due to an increase in amortization of regulatory assets. This increase was offset in Retail Margins above.

•Interest Expense increased $7 million primarily due to the amortization of carrying charges on storm-related regulatory assets. This increase was offset in Retail Margins above.

Nine Months Ended September 30, 2023 Compared to Nine Months Ended September 30, 2022

The major components of the increase in Gross Margin, defined as revenues less the related direct cost of fuel, including consumption of chemicals and emissions allowances, and purchased electricity were as follows:

•Retail Margins increased $23 million primarily due to the following:

•A $58 million increase primarily due to base rate revenue increases in Arkansas and Louisiana and rider increases in all retail jurisdictions. These increases were partially offset in other expense items below.

This increase was partially offset by:

•A $14 million decrease in weather-related usage primarily due to a 41% decrease in heating degree days.

•A $12 million decrease due to an increase in PTC benefits provided to customers. This decrease was offset in Income Tax Benefit below.

•An $11 million decrease in weather-normalized margins primarily in the residential and wholesale classes, partially offset by an increase in the industrial class.

•Margins from Off-system Sales decreased $11 million primarily due to reduced Turk Plant merchant sales.

Expenses and Other and Income Tax Benefit changed between years as follows:

•Other Operation and Maintenance expenses decreased $14 million primarily due to the following:

•A $10 million decrease due to the capitalization of previously expensed renewable generation pre-construction charges.

•A $7 million decrease due to legislation passed in Texas in May 2023 allowing employee financially based incentives to be recovered.

•A $7 million decrease in transmission expenses primarily due to a change in rider recovery.

These decreases were partially offset by:

•An $8 million increase in accounts receivable factoring expenses primarily due to increased interest rates.

•Depreciation and Amortization expenses increased $15 million primarily due to an increase in amortization of regulatory assets. This increase was offset in Retail Margins above.

•Taxes Other Than Income Taxes increased $10 million primarily due to increased property taxes driven by the investment in the NCWF.

•Interest Expense increased $5 million primarily due to higher long-term debt balances and interest rates.

•Income Tax Benefit increased $15 million primarily due to the following:

•A $12 million increase in PTCs. This increase was offset in Retail Margins above.

•A $4 million increase due to a decrease in state tax expense.

107

SOUTHWESTERN ELECTRIC POWER COMPANY CONSOLIDATED

CONDENSED CONSOLIDATED STATEMENTS OF INCOME

For the Three and Nine Months Ended September 30, 2023 and 2022

(in millions)

(Unaudited)

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2023		2022		2023		2022
REVENUES
Electric Generation, Transmission and Distribution	$	639.8	$	698.8	$	1,666.0	$	1,703.7
Sales to AEP Affiliates	14.5		18.2		40.7		43.7
Other Revenues	0.5		0.5		1.8		1.5
TOTAL REVENUES	654.8		717.5		1,708.5		1,748.9
EXPENSES
Purchased Electricity, Fuel and Other Consumables Used for Electric Generation	215.4		290.9		614.6		669.1
Other Operation	96.9		114.1		281.3		308.7
Maintenance	38.4		32.9		121.1		107.8
Depreciation and Amortization	100.6		95.8		266.8		251.8
Taxes Other Than Income Taxes	36.2		34.2		104.4		94.9
TOTAL EXPENSES	487.5		567.9		1,388.2		1,432.3
OPERATING INCOME	167.3		149.6		320.3		316.6
Other Income (Expense):
Interest Income	4.1		2.7		14.8		13.9
Allowance for Equity Funds Used During Construction	4.3		1.0		7.3		3.4
Non-Service Cost Components of Net Periodic Benefit Cost	3.4		3.2		10.2		9.4
Interest Expense	(42.1)		(35.2)		(107.2)		(102.0)
INCOME BEFORE INCOME TAX BENEFIT AND EQUITY EARNINGS	137.0		121.3		245.4		241.3
Income Tax Benefit	(21.7)		(17.8)		(35.7)		(21.0)
Equity Earnings of Unconsolidated Subsidiary	0.3		0.3		1.0		1.0
NET INCOME	159.0		139.4		282.1		263.3
Net Income Attributable to Noncontrolling Interest	1.5		—		3.0		3.1
EARNINGS ATTRIBUTABLE TO SWEPCo COMMON SHAREHOLDER	$	157.5	$	139.4	$	279.1	$	260.2
The common stock of SWEPCo is wholly-owned by Parent.
See Condensed Notes to Condensed Financial Statements of Registrants beginning on page 114.

108

SOUTHWESTERN ELECTRIC POWER COMPANY CONSOLIDATED

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS)

For the Three and Nine Months Ended September 30, 2023 and 2022

(in millions)

(Unaudited)

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2023		2022		2023		2022
Net Income	$	159.0	$	139.4	$	282.1	$	263.3
OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAXES
Cash Flow Hedges, Net of Tax of $0 and $0 for the Three Months Ended September 30, 2023 and 2022, Respectively, and $0.1 and $0 for the Nine Months Ended September 30, 2023 and 2022, Respectively	—		—		0.3		—
Amortization of Pension and OPEB Deferred Costs, Net of Tax of $(0.1) and $(0.1) for the Three Months Ended September 30, 2023 and 2022, Respectively, and $(0.3) and $(0.3) for the Nine Months Ended September 30, 2023 and 2022, Respectively	(0.4)		(0.4)		(1.0)		(1.2)
TOTAL OTHER COMPREHENSIVE LOSS	(0.4)		(0.4)		(0.7)		(1.2)
TOTAL COMPREHENSIVE INCOME	158.6		139.0		281.4		262.1
Total Comprehensive Income Attributable to Noncontrolling Interest	1.5		—		3.0		3.1
TOTAL COMPREHENSIVE INCOME ATTRIBUTABLE TO SWEPCo COMMON SHAREHOLDER	$	157.1	$	139.0	$	278.4	$	259.0
See Condensed Notes to Condensed Financial Statements of Registrants beginning on page 114.

109

SOUTHWESTERN ELECTRIC POWER COMPANY CONSOLIDATED

CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY

For the Nine Months Ended September 30, 2023 and 2022

(in millions)

(Unaudited)

	SWEPCo Common Shareholder
	Common Stock		Paid-in Capital		Retained Earnings		Accumulated Other Comprehensive Income (Loss)		Noncontrolling Interest		Total
TOTAL EQUITY – DECEMBER 31, 2021	$	0.1	$	1,092.2	$	2,050.9	$	6.7	$	(0.1)	$	3,149.8
Capital Contribution from Parent			350.0								350.0
Common Stock Dividends – Nonaffiliated									(0.8)		(0.8)
Net Income					44.1				1.0		45.1
Other Comprehensive Loss							(0.3)				(0.3)
TOTAL EQUITY – MARCH 31, 2022	0.1		1,442.2		2,095.0		6.4		0.1		3,543.8
Capital Contribution from Parent			2.2								2.2
Common Stock Dividends					(12.5)						(12.5)
Common Stock Dividends – Nonaffiliated									(0.7)		(0.7)
Net Income					76.7				2.1		78.8
Other Comprehensive Loss							(0.5)				(0.5)
TOTAL EQUITY – JUNE 30, 2022	0.1		1,444.4		2,159.2		5.9		1.5		3,611.1
Capital Contribution from Parent			1.1								1.1
Common Stock Dividends					(45.0)						(45.0)
Common Stock Dividends – Nonaffiliated									(1.1)		(1.1)
Net Income					139.4				—		139.4
Other Comprehensive Loss							(0.4)				(0.4)
TOTAL EQUITY – SEPTEMBER 30, 2022	$	0.1	$	1,445.5	$	2,253.6	$	5.5	$	0.4	$	3,705.1
TOTAL EQUITY – DECEMBER 31, 2022	$	0.1	$	1,442.2	$	2,236.0	$	(4.2)	$	0.7	$	3,674.8
Capital Contribution from Parent			50.0								50.0
Common Stock Dividends – Nonaffiliated									(1.5)		(1.5)
Net Income					40.6				1.2		41.8
Other Comprehensive Income							0.1				0.1
TOTAL EQUITY – MARCH 31, 2023	0.1		1,492.2		2,276.6		(4.1)		0.4		3,765.2
Common Stock Dividends					(50.0)						(50.0)
Common Stock Dividends – Nonaffiliated									(0.6)		(0.6)
Net Income					81.0				0.3		81.3
Other Comprehensive Loss							(0.4)				(0.4)
TOTAL EQUITY – JUNE 30, 2023	0.1		1,492.2		2,307.6		(4.5)		0.1		3,795.5
Common Stock Dividends					(75.0)						(75.0)
Common Stock Dividends – Nonaffiliated									(0.3)		(0.3)
Net Income					157.5				1.5		159.0
Other Comprehensive Loss							(0.4)				(0.4)
TOTAL EQUITY – SEPTEMBER 30, 2023	$	0.1	$	1,492.2	$	2,390.1	$	(4.9)	$	1.3	$	3,878.8

See Condensed Notes to Condensed Financial Statements of Registrants beginning on page 114.

110

SOUTHWESTERN ELECTRIC POWER COMPANY CONSOLIDATED

CONDENSED CONSOLIDATED BALANCE SHEETS

ASSETS

September 30, 2023 and December 31, 2022

(in millions)

(Unaudited)

	September 30,		December 31,
	2023		2022
CURRENT ASSETS
Cash and Cash Equivalents (September 30, 2023 and December 31, 2022 Amounts Include $0 and $84.2, Respectively, Related to Sabine)	$	3.6	$	88.4
Advances to Affiliates	2.7		2.1
Accounts Receivable:
Customers	32.9		38.8
Affiliated Companies	43.8		65.4
Miscellaneous	8.3		10.4
Allowance for Uncollectible Accounts	(0.1)		—
Total Accounts Receivable	84.9		114.6
Fuel (September 30, 2023 and December 31, 2022 Amounts Include $0 and $14.2, Respectively, Related to Sabine)	94.2		81.3
Materials and Supplies (September 30, 2023 and December 31, 2022 Amounts Include $3.9 and $4.2, Respectively, Related to Sabine)	88.6		92.1
Risk Management Assets	17.1		16.4
Accrued Tax Benefits	78.1		16.5
Regulatory Asset for Under-Recovered Fuel Costs	184.4		353.0
Prepayments and Other Current Assets	38.9		47.8
TOTAL CURRENT ASSETS	592.5		812.2
PROPERTY, PLANT AND EQUIPMENT
Electric:
Generation	4,892.8		5,476.2
Transmission	2,557.0		2,479.8
Distribution	2,769.9		2,659.6
Other Property, Plant and Equipment (September 30, 2023 and December 31, 2022 Amounts Include $185 and $219.8, Respectively, Related to Sabine)	801.7		804.4
Construction Work in Progress	598.2		369.5
Total Property, Plant and Equipment	11,619.6		11,789.5
Accumulated Depreciation and Amortization (September 30, 2023 and December 31, 2022 Amounts Include $185 and $212.5, Respectively, Related to Sabine)	3,057.1		3,527.3
TOTAL PROPERTY, PLANT AND EQUIPMENT – NET	8,562.5		8,262.2
OTHER NONCURRENT ASSETS
Regulatory Assets	1,116.9		1,042.4
Deferred Charges and Other Noncurrent Assets	289.2		262.0
TOTAL OTHER NONCURRENT ASSETS	1,406.1		1,304.4
TOTAL ASSETS	$	10,561.1	$	10,378.8
See Condensed Notes to Condensed Financial Statements of Registrants beginning on page 114.

111

SOUTHWESTERN ELECTRIC POWER COMPANY CONSOLIDATED

CONDENSED CONSOLIDATED BALANCE SHEETS

LIABILITIES AND EQUITY

September 30, 2023 and December 31, 2022

(Unaudited)

	September 30,		December 31,
	2023		2022
	(in millions)
CURRENT LIABILITIES
Advances from Affiliates	$	48.9	$	310.7
Accounts Payable:
General	232.1		213.1
Affiliated Companies	31.3		81.7
Short-term Debt – Nonaffiliated	3.9		—
Long-term Debt Due Within One Year – Nonaffiliated	—		6.2
Customer Deposits	71.5		65.4
Accrued Taxes	123.8		52.8
Accrued Interest	38.3		36.0
Obligations Under Operating Leases	9.4		8.4
Asset Retirement Obligations	43.7		43.7
Other Current Liabilities	97.0		129.7
TOTAL CURRENT LIABILITIES	699.9		947.7
NONCURRENT LIABILITIES
Long-term Debt – Nonaffiliated	3,646.2		3,385.4
Deferred Income Taxes	1,162.5		1,089.7
Regulatory Liabilities and Deferred Investment Tax Credits	760.3		825.7
Asset Retirement Obligations	218.1		237.2
Employee Benefits and Pension Obligations	30.5		29.7
Obligations Under Operating Leases	123.8		120.2
Deferred Credits and Other Noncurrent Liabilities	41.0		68.4
TOTAL NONCURRENT LIABILITIES	5,982.4		5,756.3
TOTAL LIABILITIES	6,682.3		6,704.0
Rate Matters (Note 4)
Commitments and Contingencies (Note 5)
EQUITY
Common Stock – Par Value – $18 Per Share:
Authorized – 3,680 Shares
Outstanding – 3,680 Shares	0.1		0.1
Paid-in Capital	1,492.2		1,442.2
Retained Earnings	2,390.1		2,236.0
Accumulated Other Comprehensive Income (Loss)	(4.9)		(4.2)
TOTAL COMMON SHAREHOLDER’S EQUITY	3,877.5		3,674.1
Noncontrolling Interest	1.3		0.7
TOTAL EQUITY	3,878.8		3,674.8
TOTAL LIABILITIES AND EQUITY	$	10,561.1	$	10,378.8
See Condensed Notes to Condensed Financial Statements of Registrants beginning on page 114.

112

SOUTHWESTERN ELECTRIC POWER COMPANY CONSOLIDATED

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

For the Nine Months Ended September 30, 2023 and 2022

(in millions)

(Unaudited)

	Nine Months Ended September 30,
	2023		2022
OPERATING ACTIVITIES
Net Income	$	282.1	$	263.3
Adjustments to Reconcile Net Income to Net Cash Flows from Operating Activities:
Depreciation and Amortization	266.8		251.8
Deferred Income Taxes	44.9		7.5
Allowance for Equity Funds Used During Construction	(7.3)		(3.4)
Mark-to-Market of Risk Management Contracts	1.4		(27.6)
Property Taxes	(24.6)		(22.0)
Deferred Fuel Over/Under-Recovery, Net	134.4		(82.0)
Change in Regulatory Assets	(36.7)		3.1
Change in Other Noncurrent Assets	(10.2)		52.0
Change in Other Noncurrent Liabilities	(26.7)		17.3
Changes in Certain Components of Working Capital:
Accounts Receivable, Net	29.7		(17.9)
Fuel, Materials and Supplies	(12.0)		23.5
Accounts Payable	5.3		78.9
Accrued Taxes, Net	10.8		(1.1)
Other Current Assets	10.4		(12.0)
Other Current Liabilities	(40.6)		(38.1)
Net Cash Flows from Operating Activities	627.7		493.3
INVESTING ACTIVITIES
Construction Expenditures	(614.1)		(397.0)
Change in Advances to Affiliates, Net	(0.6)		153.8
Acquisition of the North Central Wind Energy Facilities	—		(658.0)
Other Investing Activities	1.8		3.9
Net Cash Flows Used for Investing Activities	(612.9)		(897.3)
FINANCING ACTIVITIES
Capital Contribution from Parent	50.0		353.3
Issuance of Long-term Debt – Nonaffiliated	346.8		—
Change in Short-term Debt – Nonaffiliated	3.9		—
Change in Advances from Affiliates, Net	(261.8)		156.3
Retirement of Long-term Debt – Nonaffiliated	(94.1)		(4.7)
Principal Payments for Finance Lease Obligations	(17.6)		(8.0)
Dividends Paid on Common Stock	(125.0)		(57.5)
Dividends Paid on Common Stock – Nonaffiliated	(2.4)		(2.6)
Other Financing Activities	0.6		0.4
Net Cash Flows from (Used for) Financing Activities	(99.6)		437.2
Net Increase (Decrease) in Cash and Cash Equivalents	(84.8)		33.2
Cash and Cash Equivalents at Beginning of Period	88.4		51.2
Cash and Cash Equivalents at End of Period	$	3.6	$	84.4
SUPPLEMENTARY INFORMATION
Cash Paid for Interest, Net of Capitalized Amounts	$	89.8	$	102.1
Net Cash Paid (Received) for Income Taxes	(23.3)		34.7
Noncash Acquisitions Under Finance Leases	4.6		3.2
Construction Expenditures Included in Current Liabilities as of September 30,	69.0		71.8
See Condensed Notes to Condensed Financial Statements of Registrants beginning on page 114.

113

INDEX OF CONDENSED NOTES TO CONDENSED FINANCIAL STATEMENTS OF REGISTRANTS

The condensed notes to condensed financial statements are a combined presentation for the Registrants. The following list indicates Registrants to which the notes apply. Specific disclosures within each note apply to all Registrants unless indicated otherwise:

Note	Registrant	Page Number
Significant Accounting Matters	AEP, AEP Texas, AEPTCo, APCo, I&M, OPCo, PSO, SWEPCo	115
New Accounting Standards	AEP, AEP Texas, AEPTCo, APCo, I&M, OPCo, PSO, SWEPCo	117
Comprehensive Income	AEP	118
Rate Matters	AEP, AEP Texas, AEPTCo, APCo, I&M, OPCo, PSO, SWEPCo	120
Commitments, Guarantees and Contingencies	AEP, AEP Texas, AEPTCo, APCo, I&M, OPCo, PSO, SWEPCo	137
Acquisitions, Dispositions and Impairments	AEP, AEPTCo, PSO, SWEPCo	142
Benefit Plans	AEP, AEP Texas, APCo, I&M, OPCo, PSO, SWEPCo	144
Business Segments	AEP, AEP Texas, AEPTCo, APCo, I&M, OPCo, PSO, SWEPCo	146
Derivatives and Hedging	AEP, AEP Texas, APCo, I&M, OPCo, PSO, SWEPCo	150
Fair Value Measurements	AEP, AEP Texas, AEPTCo, APCo, I&M, OPCo, PSO, SWEPCo	165
Income Taxes	AEP, AEP Texas, AEPTCo, APCo, I&M, OPCo, PSO, SWEPCo	179
Financing Activities	AEP, AEP Texas, AEPTCo, APCo, I&M, OPCo, PSO, SWEPCo	182
Variable Interest Entities	AEP	190
Property, Plant and Equipment	AEP, SWEPCo	193
Revenue from Contracts with Customers	AEP, AEP Texas, AEPTCo, APCo, I&M, OPCo, PSO, SWEPCo	194

114

1.  SIGNIFICANT ACCOUNTING MATTERS

The disclosures in this note apply to all Registrants unless indicated otherwise.

General

The unaudited condensed financial statements and footnotes were prepared in accordance with GAAP for interim financial information and with the instructions to Form 10-Q and Article 10 of Regulation S-X of the SEC.  Accordingly, they do not include all of the information and footnotes required by GAAP for complete annual financial statements.

In the opinion of management, the unaudited condensed interim financial statements reflect all normal and recurring accruals and adjustments necessary for a fair statement of the net income, financial position and cash flows for the interim periods for each Registrant.  Net income for the three and nine months ended September 30, 2023 is not necessarily indicative of results that may be expected for the year ending December 31, 2023.  The condensed financial statements are unaudited and should be read in conjunction with the audited 2022 financial statements and notes thereto, which are included in the Registrants’ Annual Reports on Form 10-K as filed with the SEC on February 23, 2023.

Earnings Per Share (EPS) (Applies to AEP)

Basic EPS is calculated by dividing net earnings available to common shareholders by the weighted-average number of common shares outstanding during the period.  Diluted EPS is calculated by adjusting the weighted-average outstanding common shares, assuming conversion of all potentially dilutive stock awards.

The following table presents AEP’s basic and diluted EPS calculations included on the statements of income:

	Three Months Ended September 30,
	2023				2022
	(in millions, except per share data)
			$/share				$/share
Earnings Attributable to AEP Common Shareholders	$	953.7			$	683.7
Weighted-Average Number of Basic AEP Common Shares Outstanding	520.5		$	1.83	513.7		$	1.33
Weighted-Average Dilutive Effect of Stock-Based Awards	0.9		—		1.6		—
Weighted-Average Number of Diluted AEP Common Shares Outstanding	521.4		$	1.83	515.3		$	1.33

	Nine Months Ended September 30,
	2023				2022
	(in millions, except per share data)
			$/share				$/share
Earnings Attributable to AEP Common Shareholders	$	1,871.9			$	1,922.9
Weighted-Average Number of Basic AEP Common Shares Outstanding	516.5		$	3.62	511.2		$	3.76
Weighted-Average Dilutive Effect of Stock-Based Awards	1.3		—		1.5		(0.01)
Weighted-Average Number of Diluted AEP Common Shares Outstanding	517.8		$	3.62	512.7		$	3.75

There were no antidilutive shares outstanding as of September 30, 2023 and 2022, respectively.

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Restricted Cash (Applies to AEP, AEP Texas and APCo)

Restricted Cash primarily includes funds held by trustees for the payment of securitization bonds.

Reconciliation of Cash, Cash Equivalents and Restricted Cash

The following tables provide a reconciliation of Cash, Cash Equivalents and Restricted Cash reported within the balance sheets that sum to the total of the same amounts shown on the statements of cash flows:

	September 30, 2023
	AEP		AEP Texas		APCo
	(in millions)
Cash and Cash Equivalents	$	353.3	$	0.1	$	4.5
Restricted Cash	53.8		46.9		6.9
Total Cash, Cash Equivalents and Restricted Cash	$	407.1	$	47.0	$	11.4

	December 31, 2022
	AEP		AEP Texas		APCo
	(in millions)
Cash and Cash Equivalents	$	509.4	$	0.1	$	7.5
Restricted Cash	47.1		32.7		14.4
Total Cash, Cash Equivalents and Restricted Cash	$	556.5	$	32.8	$	21.9

Supplementary Cash Flow Information (Applies to AEP)

	Nine Months Ended September 30,
Cash Flow Information	2023		2022
	(in millions)
Cash Paid for:
Interest, Net of Capitalized Amounts	$	1,148.7	$	856.8
Income Taxes	26.7		104.1
Noncash Investing and Financing Activities:
Acquisitions Under Finance Leases	38.5		22.3
Construction Expenditures Included in Current Liabilities as of September 30,	975.0		985.8
Acquisition of Nuclear Fuel Included in Current Liabilities as of September 30,	9.5		8.5
Noncash Increase in Noncurrent Assets from the Sale of the Competitive Contracted Renewables Portfolio	74.7		—

116

2. NEW ACCOUNTING STANDARDS

The disclosures in this note apply to all Registrants unless indicated otherwise.

During the FASB’s standard-setting process and upon issuance of final standards, management reviews the new accounting literature to determine its relevance, if any, to the Registrants’ business. There are no new standards expected to have a material impact on the Registrants’ financial statements.

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3.  COMPREHENSIVE INCOME

The disclosures in this note apply to AEP only. The impact of AOCI is not material to the financial statements of the Registrant Subsidiaries.

Presentation of Comprehensive Income

The following tables provide AEP’s components of changes in AOCI and details of reclassifications from AOCI.  The amortization of pension and OPEB AOCI components are included in the computation of net periodic pension and OPEB costs. See Note 7 - Benefit Plans for additional information.

	Cash Flow Hedges				Pension
Three Months Ended September 30, 2023	Commodity		Interest Rate		and OPEB		Total
	(in millions)
Balance in AOCI as of June 30, 2023	$	93.5	$	12.7	$	(142.6)	$	(36.4)
Change in Fair Value Recognized in AOCI, Net of Tax	19.3		(6.9)		—		12.4
Amount of (Gain) Loss Reclassified from AOCI
Purchased Electricity, Fuel and Other Consumables Used for Electric Generation (a)	(15.6)		—		—		(15.6)
Interest Expense (a)	—		(1.3)		—		(1.3)
Amortization of Prior Service Cost (Credit)	—		—		(5.3)		(5.3)
Amortization of Actuarial (Gains) Losses	—		—		1.3		1.3
Reclassifications from AOCI, before Income Tax Benefit	(15.6)		(1.3)		(4.0)		(20.9)
Income Tax Benefit	(3.4)		(0.2)		(0.8)		(4.4)
Reclassifications from AOCI, Net of Income Tax Benefit	(12.2)		(1.1)		(3.2)		(16.5)
Net Current Period Other Comprehensive Income (Loss)	7.1		(8.0)		(3.2)		(4.1)
Balance in AOCI as of September 30, 2023	$	100.6	$	4.7	$	(145.8)	$	(40.5)

	Cash Flow Hedges				Pension
Three Months Ended September 30, 2022	Commodity		Interest Rate		and OPEB		Total
	(in millions)
Balance in AOCI as of June 30, 2022	$	533.6	$	(10.8)	$	28.6	$	551.4
Change in Fair Value Recognized in AOCI, Net of Tax	94.3		7.4		—		101.7
Amount of (Gain) Loss Reclassified from AOCI
Generation & Marketing Revenues (a)	0.2		—		—		0.2
Purchased Electricity, Fuel and Other Consumables Used for Electric Generation (a)	(222.6)		—		—		(222.6)
Interest Expense (a)	—		0.9		—		0.9
Amortization of Prior Service Cost (Credit)	—		—		(6.2)		(6.2)
Amortization of Actuarial (Gains) Losses	—		—		2.2		2.2
Reclassifications from AOCI, before Income Tax (Expense) Benefit	(222.4)		0.9		(4.0)		(225.5)
Income Tax (Expense) Benefit	(46.6)		0.1		(0.8)		(47.3)
Reclassifications from AOCI, Net of Income Tax (Expense) Benefit	(175.8)		0.8		(3.2)		(178.2)
Net Current Period Other Comprehensive Income (Loss)	(81.5)		8.2		(3.2)		(76.5)
Balance in AOCI as of September 30, 2022	$	452.1	$	(2.6)	$	25.4	$	474.9

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	Cash Flow Hedges				Pension
Nine Months Ended September 30, 2023	Commodity		Interest Rate		and OPEB		Total
	(in millions)
Balance in AOCI as of December 31, 2022	$	223.5	$	0.3	$	(140.1)	$	83.7
Change in Fair Value Recognized in AOCI, Net of Tax	(170.1)		5.3		(12.9)		(177.7)
Amount of (Gain) Loss Reclassified from AOCI
Purchased Electricity, Fuel and Other Consumables Used for Electric Generation (a)	59.7		—		—		59.7
Interest Expense (a)	—		(1.1)		—		(1.1)
Amortization of Prior Service Cost (Credit)	—		—		(15.9)		(15.9)
Amortization of Actuarial (Gains) Losses	—		—		3.9		3.9
Reclassifications from AOCI, before Income Tax (Expense) Benefit	59.7		(1.1)		(12.0)		46.6
Income Tax (Expense) Benefit	12.5		(0.2)		(2.5)		9.8
Reclassifications from AOCI, Net of Income Tax (Expense) Benefit	47.2		(0.9)		(9.5)		36.8
Reclassifications of KPCo Pension and OPEB Regulatory Assets from AOCI	—		—		21.1		21.1
Income Tax (Expense) Benefit	—		—		4.4		4.4
Reclassifications of KPCo Pension and OPEB Regulatory Assets from AOCI, Net of Income Tax (Expense) Benefit	—		—		16.7		16.7
Net Current Period Other Comprehensive Income (Loss)	(122.9)		4.4		(5.7)		(124.2)
Balance in AOCI as of September 30, 2023	$	100.6	$	4.7	$	(145.8)	$	(40.5)

	Cash Flow Hedges				Pension
Nine Months Ended September 30, 2022	Commodity		Interest Rate		and OPEB		Total
	(in millions)
Balance in AOCI as of December 31, 2021	$	163.7	$	(21.3)	$	42.4	$	184.8
Change in Fair Value Recognized in AOCI, Net of Tax	629.8		16.2		—		646.0
Amount of (Gain) Loss Reclassified from AOCI
Generation & Marketing Revenues (a)	0.2		—		—		0.2
Purchased Electricity, Fuel and Other Consumables Used for Electric Generation (a)	(432.3)		—		—		(432.3)
Interest Expense (a)	—		3.1		—		3.1
Amortization of Prior Service Cost (Credit)	—		—		(16.5)		(16.5)
Amortization of Actuarial (Gains) Losses	—		—		6.4		6.4
Reclassifications from AOCI, before Income Tax (Expense) Benefit	(432.1)		3.1		(10.1)		(439.1)
Income Tax (Expense) Benefit	(90.7)		0.6		(2.1)		(92.2)
Reclassifications from AOCI, Net of Income Tax (Expense) Benefit	(341.4)		2.5		(8.0)		(346.9)
Reclassifications of KPCo Pension and OPEB Regulatory Assets to AOCI	—		—		(11.4)		(11.4)
Income Tax (Expense) Benefit	—		—		(2.4)		(2.4)
Reclassifications of KPCo Pension and OPEB Regulatory Assets to AOCI, Net of Income Tax (Expense) Benefit	—		—		(9.0)		(9.0)
Net Current Period Other Comprehensive Income (Loss)	288.4		18.7		(17.0)		290.1
Balance in AOCI as of September 30, 2022	$	452.1	$	(2.6)	$	25.4	$	474.9

(a)Amounts reclassified to the referenced line item on the statements of income.

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4.  RATE MATTERS

The disclosures in this note apply to all Registrants unless indicated otherwise.

As discussed in the 2022 Annual Report, the Registrants are involved in rate and regulatory proceedings at the FERC and their state commissions. The Rate Matters note within the 2022 Annual Report should be read in conjunction with this report to gain a complete understanding of material rate matters still pending that could impact net income, cash flows and possibly financial condition. The following discusses ratemaking developments in 2023 and updates the 2022 Annual Report.

Coal-Fired Generation Plants (Applies to AEP, PSO and SWEPCo)

Compliance with extensive environmental regulations requires significant capital investment in environmental monitoring, installation of pollution control equipment, emission fees, disposal costs and permits. Management continuously evaluates cost estimates of complying with these regulations which has resulted in, and in the future may result in, a decision to retire coal-fired generating facilities earlier than their currently estimated useful lives.

Management is seeking or will seek regulatory recovery, as necessary, for any net book value remaining when the plants are retired. To the extent the net book value of these generation assets is not deemed recoverable, it could reduce future net income and cash flows and impact financial condition.

Regulated Generating Units that have been Retired

SWEPCo

In December 2021, the Dolet Hills Power Station was retired. As part of the 2020 Texas Base Rate Case, the PUCT authorized recovery of SWEPCo’s Texas jurisdictional share of the Dolet Hills Power Station through 2046, but denied SWEPCo the ability to earn a return on this investment resulting in a disallowance of $12 million in 2021. As part of the 2021 Arkansas Base Rate Case, the APSC authorized recovery of SWEPCo’s Arkansas jurisdictional share of the Dolet Hills Power Station through 2027, but denied SWEPCo the ability to earn a return on this investment resulting in a disallowance of $2 million in the second quarter of 2022. Also, the APSC did not rule on the prudency of the early retirement of the Dolet Hills Power Station, which will be addressed in a future proceeding. As part of the 2020 Louisiana Base Rate Case, the LPSC authorized the recovery of SWEPCo’s Louisiana share of the Dolet Hills Power Station, through a separate rider, through 2032, but did not rule on the prudency of the early retirement of the plant, which is being addressed in a separate proceeding. See “2020 Texas Base Rate Case” and “2020 Louisiana Base Rate Case” sections below for additional information.

In March 2023, the Pirkey Plant was retired. As part of the 2020 Louisiana Base Rate Case, the LPSC authorized the recovery of SWEPCo’s Louisiana jurisdictional share of the Pirkey Plant, through a separate rider, through 2032. As part of the 2021 Arkansas Base Rate Case, the APSC granted SWEPCo regulatory asset treatment. SWEPCo will request recovery including a weighted average cost of capital carrying charge through a future proceeding. In July 2023, Texas ALJs issued a proposal for decision that concluded the decision to retire the Pirkey Plant was prudent. In September 2023, the PUCT rejected the ALJs proposal for decision concluding the retirement of the Pirkey Plant was prudent. In the open meeting, the commissioners expressed their concerns that the analysis in support of SWEPCo’s decision to retire the Pirkey Plant was not robust enough and that SWEPCo should have re-evaluated the decision following Winter Storm Uri. The treatment of the cost of recovery of the Pirkey Plant is expected to be addressed in a future rate case. As of September 30, 2023, the Texas jurisdictional share of the net book value of the Pirkey Plant was $66 million. To the extent any portion of the Texas jurisdictional share of the net book value of the Pirkey Plant is not recoverable, it could reduce future net income and cash flows and impact financial condition.

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Regulated Generating Units to be Retired

PSO

In 2014, PSO received final approval from the Federal EPA to close Northeastern Plant, Unit 3, in 2026. The plant was originally scheduled to close in 2040. As a result of the early retirement date, PSO revised the useful life of Northeastern Plant, Unit 3, to the projected retirement date of 2026 and the incremental depreciation is being deferred as a regulatory asset. As part of the 2021 Oklahoma Base Rate Case, PSO will continue to recover Northeastern Plant, Unit 3 through 2040.

SWEPCo

In November 2020, management announced that it will cease using coal at the Welsh Plant in 2028. As a result of the announcement, SWEPCo began recording a regulatory asset for accelerated depreciation.

The table below summarizes the net book value including CWIP, before cost of removal and materials and supplies, as of September 30, 2023, of generating facilities planned for early retirement:

Plant	Net Book Value		Accelerated Depreciation Regulatory Asset		Cost of Removal Regulatory Liability			Projected Retirement Date		Current Authorized Recovery Period	Annual Depreciation (a)
	(dollars in millions)
Northeastern Plant, Unit 3	$	112.5	$	159.5	$	20.4	(b)	2026		(c)	$	15.0
Welsh Plant, Units 1 and 3	368.8		115.5		58.0		(d)	2028	(e)	(f)	38.6

(a)Represents the amount of annual depreciation that has been collected from customers over the prior 12-month period.

(b)Includes Northeastern Plant, Unit 4, which was retired in 2016. Removal of Northeastern Plant, Unit 4, will be performed with the removal of Northeastern Plant, Unit 3, after retirement.

(c)Northeastern Plant, Unit 3 is currently being recovered through 2040.

(d)Includes Welsh Plant, Unit 2, which was retired in 2016. Removal of Welsh Plant, Unit 2, will be performed with the removal of Welsh Plant, Units 1 and 3, after retirement.

(e)Represents projected retirement date of coal assets, units are being evaluated for conversion to natural gas after 2028.

(f)Unit 1 is being recovered through 2027 in the Louisiana jurisdiction and through 2037 in the Arkansas and Texas jurisdictions. Unit 3 is being recovered through 2032 in the Louisiana jurisdiction and through 2042 in the Arkansas and Texas jurisdictions.

Dolet Hills Power Station and Related Fuel Operations (Applies to AEP and SWEPCo)

In December 2021, the Dolet Hills Power Station was retired. While in operation, DHLC provided 100% of the fuel supply to Dolet Hills Power Station.

The remaining book value of Dolet Hills Power Station non-fuel related assets are recoverable by SWEPCo through rate riders. As of September 30, 2023, SWEPCo’s share of the net investment in the Dolet Hills Power Station was $105 million, including materials and supplies, net of cost of removal collected in rates.

Fuel costs incurred by the Dolet Hills Power Station are recoverable by SWEPCo through active fuel clauses and are subject to prudency determinations by the various commissions. After closure of the DHLC mining operations and the Dolet Hills Power Station, additional reclamation and other land-related costs incurred by DHLC and Oxbow will continue to be billed to SWEPCo and included in existing fuel clauses. As of September 30, 2023, SWEPCo had a net under-recovered fuel balance of $91 million, inclusive of costs related to the Dolet Hills Power Station billed by DHLC, but excluding impacts of the February 2021 severe winter weather event.

In March 2021, the LPSC issued an order allowing SWEPCo to recover up to $20 million of fuel costs in 2021 and defer approximately $35 million of additional costs with a recovery period to be determined at a later date. In August 2022, the LPSC staff filed testimony recommending fuel disallowances of $72 million, including denial of recovery of the $35 million deferral, with refunds to customers over five years. In September 2022, SWEPCo filed rebuttal testimony addressing the LPSC staff recommendations and a hearing was held in May 2023.

121

In March 2021, the APSC approved fuel rates that provide recovery of $20 million for the Arkansas share of the 2021 Dolet Hills Power Station fuel costs over five years through the existing fuel clause.

In June 2023, an unopposed settlement agreement was filed with the PUCT that would provide recovery of $48 million of Oxbow mine related costs through 2035. In September 2023, the PUCT approved the settlement agreement.

If any of these costs are not recoverable, it could reduce future net income and cash flows and impact financial condition.

Pirkey Plant and Related Fuel Operations (Applies to AEP and SWEPCo)

In March 2023, the Pirkey Plant was retired. SWEPCo is recovering, or will seek recovery of, the remaining net book value of Pirkey Plant non-fuel costs. As of September 30, 2023, SWEPCo’s share of the net investment in the Pirkey Plant was $180 million, including materials and supplies, net of cost of removal. See the “Regulated Generating Units that have been Retired” section above for additional information. Fuel costs are recovered through active fuel clauses and are subject to prudency determinations by the various commissions. As of March 31, 2023, SWEPCo fuel deliveries, including billings of all fixed costs, from Sabine ceased. Additionally, as of September 30, 2023, SWEPCo had a net under-recovered fuel balance of $91 million, inclusive of costs related to the Pirkey Plant billed by Sabine, but excluding impacts of the February 2021 severe winter weather event. Remaining operational, reclamation and other land-related costs incurred by Sabine will be billed to SWEPCo and included in existing fuel clauses.

In June 2023, an unopposed settlement agreement was filed with the PUCT that would provide recovery of $33 million of Sabine related fuel costs through 2035. In September 2023, the PUCT approved the settlement agreement.

In July 2023, the LPSC ordered that a separate proceeding be established to review the prudence of the decision to retire the Pirkey Plant, including the costs included in fuel for years starting in 2019 and after.

If any of these costs are not recoverable, it could reduce future net income and cash flows and impact financial condition.

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Regulatory Assets Pending Final Regulatory Approval (Applies to all Registrants except AEPTCo)

	AEP
	September 30,		December 31,
	2023		2022
Noncurrent Regulatory Assets	(in millions)
Regulatory Assets Currently Earning a Return
Welsh Plant, Units 1 and 3 Accelerated Depreciation	$	115.5	$	85.6
Pirkey Plant	113.0		116.5
Unrecovered Winter Storm Fuel Costs (a)	101.4		121.7
Dolet Hills Power Station Fuel Costs - Louisiana	34.7		32.0
Texas Mobile Generation Costs (b)	—		17.6
Other Regulatory Assets Pending Final Regulatory Approval	21.0		19.3
Regulatory Assets Currently Not Earning a Return
Storm-Related Costs (c)(d)(e)	385.8		407.2
2020-2022 Virginia Triennial Under-Earnings	37.4		37.9
Plant Retirement Costs – Asset Retirement Obligation Costs	25.9		25.9
Other Regulatory Assets Pending Final Regulatory Approval	51.6		55.6
Total Regulatory Assets Pending Final Regulatory Approval	$	886.3	$	919.3

(a)Includes $37 million and $37 million of unrecovered winter storm fuel costs recorded as a current regulatory asset as of September 30, 2023 and December 31, 2022, respectively. See the “February 2021 Severe Winter Weather Impacts in SPP” section below for additional information.

(b)In October 2023, the PUCT issued an order approving a rider to recover deferred Texas Mobile Generation Costs. Recovery of deferred costs through the new rider is updated annually, subject to Commission review.

(c)In October 2023, the PUCO issued an order approving recovery of $34 million in Ohio storm-related costs.

(d)In April 2023, the LPSC issued an order approving the prudence and future recovery of the Louisiana storm-related regulatory assets. See “2021 Louisiana Storm Cost Filing” section below for additional information.

(e)In June 2023, storms in the Oklahoma, Louisiana and Texas service territories caused power outages and extensive damage resulting in the deferral of $58 million, $29 million and $24 million, respectively. Recovery of these storm costs will be addressed in a future request.

	AEP Texas
	September 30,		December 31,
	2023		2022
Noncurrent Regulatory Assets	(in millions)
Regulatory Assets Currently Earning a Return
Texas Mobile Generation Costs (a)	$	—	$	17.6
Regulatory Assets Currently Not Earning a Return
Storm-Related Costs	35.9		26.7
Vegetation Management Program	5.2		5.2
Texas Retail Electric Provider Bad Debt Expense	4.1		4.1
Other Regulatory Assets Pending Final Regulatory Approval	16.3		13.4
Total Regulatory Assets Pending Final Regulatory Approval	$	61.5	$	67.0

(a)In October 2023, the PUCT issued an order approving a rider to recover deferred Texas Mobile Generation Costs. Recovery of deferred costs through the new rider is updated annually, subject to Commission review.

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	APCo
	September 30,		December 31,
	2023		2022
Noncurrent Regulatory Assets	(in millions)
Regulatory Assets Currently Earning a Return
COVID-19 – Virginia	$	7.0	$	7.0
Regulatory Assets Currently Not Earning a Return
Storm-Related Costs - West Virginia	72.2		72.6
2020-2022 Virginia Triennial Under-Earnings	37.4		37.9
Plant Retirement Costs – Asset Retirement Obligation Costs	25.9		25.9
Other Regulatory Assets Pending Final Regulatory Approval	5.9		1.1
Total Regulatory Assets Pending Final Regulatory Approval	$	148.4	$	144.5

	I&M
	September 30,		December 31,
	2023		2022
Noncurrent Regulatory Assets	(in millions)
Regulatory Assets Currently Earning a Return
Other Regulatory Assets Pending Final Regulatory Approval	$	0.2	$	0.1
Regulatory Assets Currently Not Earning a Return
Storm-Related Costs - Indiana	29.4		21.6
Other Regulatory Assets Pending Final Regulatory Approval	2.7		2.0
Total Regulatory Assets Pending Final Regulatory Approval	$	32.3	$	23.7

	OPCo
	September 30,		December 31,
	2023		2022
Noncurrent Regulatory Assets	(in millions)
Regulatory Assets Currently Not Earning a Return
Storm-Related Costs (a)	$	21.2	$	33.8
Total Regulatory Assets Pending Final Regulatory Approval	$	21.2	$	33.8

(a)In October 2023, the PUCO issued an order approving recovery of $34 million in storm-related costs.

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	PSO
	September 30,		December 31,
	2023		2022
Noncurrent Regulatory Assets	(in millions)
Regulatory Assets Currently Not Earning a Return
Storm-Related Costs (a)	$	92.8	$	25.5
Other Regulatory Assets Pending Final Regulatory Approval	0.2		0.1
Total Regulatory Assets Pending Final Regulatory Approval	$	93.0	$	25.6

(a)In June 2023, storms caused power outages and extensive damage to the Oklahoma service territory, resulting in the deferral of $58 million. Recovery for these storm costs will be addressed in a future request.

	SWEPCo
	September 30,		December 31,
	2023		2022
Noncurrent Regulatory Assets	(in millions)
Regulatory Assets Currently Earning a Return
Welsh Plant, Units 1 and 3 Accelerated Depreciation	$	115.5	$	85.6
Pirkey Plant	113.0		116.5
Unrecovered Winter Storm Fuel Costs (a)	101.4		121.7
Dolet Hills Power Station Fuel Costs - Louisiana	34.7		32.0
Dolet Hills Power Station	12.0		9.7
Other Regulatory Assets Pending Final Regulatory Approval	1.7		2.5
Regulatory Assets Currently Not Earning a Return
Storm-Related Costs (b)(c)	53.4		151.5
Asset Retirement Obligation - Louisiana	—		11.8
Other Regulatory Assets Pending Final Regulatory Approval	14.8		16.0
Total Regulatory Assets Pending Final Regulatory Approval	$	446.5	$	547.3

(a)Includes $37 million and $37 million of unrecovered winter storm fuel costs recorded as a current regulatory asset as of September 30, 2023 and December 31, 2022, respectively. See the “February 2021 Severe Winter Weather Impacts in SPP” section below for additional information.

(b)In April 2023, the LPSC issued an order approving the prudence and future recovery of the Louisiana storm-related regulatory assets. See “2021 Louisiana Storm Cost Filing” section below for additional information.

(c)In June 2023, additional storms in the Louisiana and Texas service territories caused power outages and extensive damage resulting in the deferral of $29 million and $24 million, respectively. Recovery of these storm costs will be addressed in a future request.

If these costs are ultimately determined not to be recoverable, it could reduce future net income and cash flows and impact financial condition.

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AEP Texas Rate Matters (Applies to AEP and AEP Texas)

AEP Texas Interim Transmission and Distribution Rates

Through September 30, 2023, AEP Texas’ cumulative revenues from interim base rate increases that are subject to review is approximately $884 million. A base rate review could result in a refund to customers if AEP Texas incurs a disallowance of the transmission or distribution investment on which an interim increase was based. Management is unable to determine a range of potential losses, if any, that are reasonably possible of occurring. A revenue decrease, including a refund of interim transmission and distribution rates, could reduce future net income and cash flows and impact financial condition. AEP Texas is required to file for a comprehensive rate review no later than April 5, 2024.

APCo and WPCo Rate Matters (Applies to AEP and APCo)

2020-2022 Virginia Triennial Review

In March 2023, APCo submitted its 2020-2022 Virginia triennial review filing and base rate case with the Virginia SCC as required by state law. APCo requested a $213 million annual increase in Virginia base rates based upon a proposed 10.6% return on common equity. The requested annual increase includes $47 million related to vegetation management and a $35 million increase in depreciation expense. The requested increase in depreciation expense reflects, among other things, the impacts of incremental investments made since APCo’s last depreciation study using property balances as of December 31, 2022. Effective January 1, 2023 and in accordance with past Virginia SCC directives, APCo implemented updated Virginia depreciation rates. APCo’s proposed revenue requirement also includes the recovery of certain costs incurred that partially contributed to APCo’s calculated earnings shortfall for the 2020-2022 triennial period. For triennial review periods in which a Virginia utility earns below its authorized ROE band, the utility may file to recover expenses incurred, up to the bottom of the authorized ROE band, related to certain categories of costs, including system restoration costs for severe weather events.

In August 2023, APCo, Virginia Staff and intervening parties reached a settlement agreement that included the following: (a) a $127 million annual increase in Virginia base rates, (b) a 9.5% ROE, (c) updated depreciation rates that reflect a 2040 Amos Plant retirement date, (d) approval of a $50 million regulatory asset, including tax gross-up, to be recovered over three years starting in 2024 related to major storm expenses incurred during the 2020-2022 triennial period when APCo under-earned in Virginia, (e) approval of the revenue requirement impact of net operating loss carryforward related to income taxes and approval of deferral authority for corporate alternative minimum taxes incurred and (f) approval of the revenue requirement impact of an increase in vegetation management costs with certain costs subject to over-/under-recovery accounting.

In September 2023, the hearing examiner issued a report recommending approval of the settlement agreement described above, as filed. The Virginia SCC is expected to issue an order in the fourth quarter of 2023. If any costs included in APCo’s 2020-2022 Virginia triennial review are not approved for recovery, it could reduce future net income and cash flows and impact financial condition.

ENEC (Expanded Net Energy Cost) Filings

In April 2021, APCo and WPCo (the Companies) requested a combined $73 million annual increase in ENEC rates based on a cumulative $55 million ENEC under-recovery as of February 28, 2021 and an $18 million increase in projected ENEC costs for the period September 2021 through August 2022. In September 2021, the WVPSC issued an order approving a $7 million overall increase in ENEC rates, including an approval for recovery of the Companies’ cumulative $55 million ENEC under-recovery balance and a $48 million reduction in projected costs for the period September 2021 through August 2022. Subsequently, the Companies submitted a request for reconsideration of this order, identifying flaws in the WVPSC’s calculation of forecasted future year fuel expense and purchased power costs.

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In March 2022, the WVPSC issued an order granting the Companies’ request for reconsideration, in part, and approving $31 million in projected costs for the period September 2021 through August 2022. The order also reopened the 2021 ENEC case to require the Companies to explain the significant growth in the reported under-recovery of ENEC costs and to provide various other information including revised projected costs for the period March 2022 through August 2022. Also, in March 2022, the Companies filed testimony providing the information requested in the WVPSC’s order and requested a $155 million annual increase in ENEC rates effective May 1, 2022. In May 2022, the WVPSC issued an order approving a $93 million overall increase to ENEC rates to recover projected annual ENEC costs. However, the WVPSC stated that actual and projected ENEC costs are still subject to a prudency review.

In April 2022, the Companies submitted their 2022 annual ENEC filing with the WVPSC requesting a $297 million annual increase in ENEC revenues, inclusive of the previously requested $155 million increase, effective September 1, 2022.

In September 2022, following an agreed upon delay in the proceedings of the Companies’ 2022 ENEC case, certain intervenors submitted testimony recommending disallowances of at least $83 million to the Companies’ historical period ENEC under-recovery balance along with proposals to either securitize the Companies’ remaining ENEC balance or defer recovery of this balance beyond the traditional one-year period. West Virginia staff recommended a $13 million increase in ENEC rates pending the outcome of the ENEC prudency review. In February 2023, the WVPSC issued an order stating that the commission will not grant additional rate increases for fuel costs until the WVPSC staff completes its prudency review.

In April 2023, the Companies submitted their 2023 annual ENEC filing with the WVPSC, proposing two alternatives to increase ENEC rates effective September 1, 2023. The first alternative is a $293 million annual increase in ENEC rates comprised of an $89 million increase for current year ENEC expense and a $200 million annual increase for the recovery of the Companies’ February 28, 2023 ENEC under-recovery balances over three years, including debt and equity carrying costs. The second alternative is an $89 million annual increase in ENEC rates with the Companies securitizing approximately $1.9 billion of assets, including: (a) $553 million relating to ENEC under-recoveries as of February 28, 2023, (b) $88 million relating to major storm expense deferrals and (c) $1.2 billion relating to APCo’s West Virginia jurisdictional book values of the Amos and Mountaineer Plants and forecasted CCR and ELG investments at these generating facilities. The Companies continue to reflect ENEC under-recovery balances as current on their balance sheets since management cannot assert whether the WVPSC will approve recovery of ENEC under-recovery balances over a time frame different from the traditional one-year period.

Additionally, in April 2023, the Staff submitted the prudency review prepared by an independent consultant retained by the WVPSC staff of the Companies’ operation of the Amos, Mountaineer and Mitchell coal plants that Staff was directed to conduct by the WVPSC in May 2022 (Consultant’s Report). The Consultant’s Report states the opinion of the consultant that the Companies acted imprudently by not taking steps to achieve a 69% capacity factor at their coal-fired plants and recommends applying a disallowance factor of 52.9% to the Companies’ cumulative, September 30, 2022 ENEC under-recovery balance of approximately $430 million. The Consultant’s Report further states the consultant’s opinion that this disallowance factor could also be utilized in future ENEC filings. Adoption of the Consultant’s Report’s findings by the WVPSC could result in a disallowance of up to $285 million. The Companies disagree with the conclusions and recommendations contained in the Consultant’s Report and a hearing was held with the WVPSC in September 2023.

In August 2023, the Staff and intervenors submitted testimony recommending, among other items: (a) disallowances of up to $262 million of historical ENEC under-recovery balances based on alleged lack of prudence, (b) carrying charges on under-recovered balances ranging from 2% to 4% and (c) the recovery of February 28, 2023 ENEC under-recoveries over a period of time ranging from three to five years. In addition, certain intervenors recommended the rejection of the Companies’ proposed securitization and one intervenor recommended that, no later than January 1, 2024, the Companies dispatch their coal fleet at the lower of actual purchase costs or replacement pricing through at least 2026 and that the Companies share 75% of any off-system sales revenues with customers.

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In September 2023, the WVPSC issued an order on the 2023 ENEC filing approving an $89 million annual increase in ENEC surcharge rates for the Companies’ forecasted costs for the period September 2023 through August 2024. An order from the WVPSC on the 2021 and 2022 ENEC cases is expected in the fourth quarter of 2023.

In October 2023, intervening parties submitted reply briefs. One intervening party amended their recommended disallowance to include the Companies’ full $553 million ENEC under-recovery as of February 28, 2023. The other intervening parties’ recommended disallowances remained consistent with testimony submitted in August 2023.

If any deferred ENEC costs are not recoverable, it could reduce future net income and cash flows and impact financial condition.

ETT Rate Matters (Applies to AEP)

ETT Interim Transmission Rates

AEP has a 50% equity ownership interest in ETT. Predominantly all of ETT’s revenues are based on interim rate changes that can be filed twice annually and are subject to review and possible true-up in the next base rate proceeding. Through September 30, 2023, AEP’s share of ETT’s cumulative revenues that are subject to review is approximately $1.6 billion. A base rate review could produce a refund to customers if ETT incurs a disallowance of the transmission investment on which an interim increase was based. A revenue decrease, including a refund of interim transmission rates, could reduce future net income and cash flows and impact financial condition. Management is unable to determine a range of potential losses, if any, that are reasonably possible of occurring. ETT is required to file for a comprehensive rate review no later than February 1, 2025, during which the $1.6 billion of cumulative revenues above will be subject to review.

I&M Rate Matters (Applies to AEP and I&M)

Michigan Power Supply Cost Recovery (PSCR)

In April 2023, I&M received intervenor testimony in I&M’s 2021 PSCR Reconciliation for the 12-month period ending December 31, 2021 recommending disallowances of purchased power costs of $18 million associated with the OVEC Inter-Company Power Agreement (ICPA) and the UPA with AEGCo that were alleged to be above market in applying the MPSC’s Code of Conduct rules. Michigan staff submitted testimony in I&M’s 2021 PSCR Reconciliation with no recommended disallowances for PSCR costs incurred, including those associated with the OVEC ICPA and the AEGCo UPA. Michigan staff also recommended several options to address I&M’s shortfall in achieving Michigan’s annual one percent energy waste reduction savings level, resulting in potential future disallowed costs of up to approximately $14 million. In June 2023, Michigan staff submitted rebuttal testimony to update their calculation of the 2021 market proxy price resulting in a recommended disallowance of approximately $1 million related to the OVEC ICPA. An MPSC order on I&M’s 2021 PSCR Reconciliation is expected in the fourth quarter of 2023. If any PSCR costs are not recoverable, it could reduce future net income and cash flows and impact financial condition.

2023 Indiana Base Rate Case

In August 2023, I&M filed a request with the IURC for a $116 million annual increase in Indiana base rates based upon a 2024 forecasted test year, a proposed 10.5% ROE and a proposed capital structure of 48.8% debt and 51.2% common equity. I&M proposed that the annual increase in base rates be implemented in two steps, with the first increase effective in mid-2024, following an IURC order, and the second increase effective in January 2025. The proposed annual increase includes a $41 million increase related to depreciation expense, driven by increased depreciation rates and increased capital investments, and a $15 million increase related to storm expenses. I&M’s Indiana base case filing requests recovery of certain historical period regulatory asset balances and proposes deferral accounting for certain future investments and tax related issues, including corporate alternative minimum tax expense and PTCs related to the Cook Plant. Intervenor testimony is due November 2023 and a hearing is scheduled for January 2024. If any costs included in this filing are not approved for recovery, it could reduce future net income and cash flows and impact financial condition.

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2023 Michigan Base Rate Case

In September 2023, I&M filed a request with the MPSC for a $34 million annual increase in Michigan base rates based upon a 2024 forecasted test year, a proposed 10.5% ROE and a capital structure of 49.4% debt and 50.6% common equity. The proposed annual increase includes an $11 million annual increase in depreciation expense driven by increased capital investment. I&M’s Michigan base case filing requests recovery of certain historical period regulatory asset balances and proposes deferral accounting for certain future investments and tax related issues, including corporate alternative minimum tax expense and PTCs related to the Cook Plant. Intervenor testimony is due January 2024 and a hearing is scheduled for February 2024. If any costs included in this filing are not approved for recovery, it could reduce future net income and cash flows and impact financial condition.

KPCo Rate Matters (Applies to AEP)

Fuel Adjustment Clause (FAC) Purchased Power Limitation

In May 2023, KPCo filed an application seeking authority to defer, for future recovery, approximately $12 million of December 2022 purchased power costs not recoverable through its FAC. This requested deferral accounting authority would have enabled KPCo to pursue securitization of these costs. In June 2023, the KPSC denied KPCo’s request for deferral accounting authority. In July 2023, KPCo appealed this decision to the Kentucky state appellate court.

Also in June 2023, following its order denying KPCo’s request for deferral accounting authority, the KPSC issued an order directing KPCo to show cause why it should not be subject to Kentucky statutory remedies, including fines and penalties, for failure to provide adequate service in its service territory. The KPSC’s show cause order did not make any determination regarding the adequacy of KPCo’s service. In July 2023, KPCo filed a response to the show cause order demonstrating that it has provided adequate service. A hearing is scheduled for the first quarter of 2024.

KPCo is requesting a prudency determination and recovery mechanism for these costs in its 2023 base rate. Unless and until KPCo is granted a recovery mechanism for these purchased power costs from the KPSC it will impact cash flows and financial condition. Additionally, if any fines or penalties are levied against KPCo relating to the show cause order, it could reduce net income and cash flows and impact financial condition.

2023 Kentucky Base Rate and Securitization Case

In June 2023, KPCo filed a request with the KPSC for a $94 million net annual increase in base rates based upon a proposed 9.9% ROE with the increase to be implemented no earlier than January 2024. The filing proposes no changes in depreciation rates and an annual level of storm restoration expense in base rates of approximately $1 million. KPCo also proposed to discontinue tracking of PJM transmission costs through a rider, and to instead collect an annual level of costs through base rates. In addition, KPCo has proposed a rider to recover certain distribution reliability investments and related incremental operation and maintenance expenses. KPCo also requested a prudency determination and recovery mechanism for approximately $16 million of purchased power costs not recoverable through its FAC since its last base case.

In conjunction with its June 2023 filing, KPCo further requested to finance, through the issuance of securitization bonds, approximately $471 million of regulatory assets recorded as of June 2023 including: (a) $289 million of plant retirement costs, (b) $79 million of deferred storm costs related to 2020, 2021, 2022 and 2023 major storms, (c) $52 million of deferred purchased power expenses and (d) $51 million of under-recovered purchased power rider costs. Plant retirement costs and deferred purchased power expenses have been deemed prudent in prior KPSC decisions. KPCo has requested a prudency determination in this proceeding for the deferred storm costs and under-recovered purchase power rider costs since the last base case. Consistent with Kentucky statutory requirements, the present value of the return on accumulated deferred income tax benefits related to plant retirement costs and deferred purchase power expenses were proposed to reduce the amount authorized to be financed through securitization.

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In October 2023, various intervenors filed testimony recommending an annual base rate increase of $63 million based on ROEs ranging from 9.3% to 9.7%. Intervenors supported KPCo’s securitization request, but proposed to include certain tax benefits as a reduction to the base rate revenue requirement. Intervenors also supported KPCo’s proposal to discontinue tracking of PJM transmission costs through a rider, and to instead collect an annual level of costs through base rates. Other differences between KPCo’s requested annual base rate increase and the intervenors’ recommendations are primarily due to: (a) proposals to remove certain employee-related expenses from the revenue requirement, (b) opposition to various matters related to accumulated deferred income taxes, including opposition to KPCo’s inclusion of its deferred tax asset associated with net operating loss on a stand-alone tax basis in rate base and a recommendation that KPCo not be permitted to recover a tax-related regulatory asset of approximately $33 million, (c) opposition to recovery of approximately $16 million of purchased power costs not recoverable through its FAC since its last base case and (d) a recommendation that KPCo not earn a return on $42 million of prepaid pension and OPEB assets. In addition, intervenors expressed opposition to KPCo’s proposed rider to recover certain distribution reliability investments and related incremental operation and maintenance expenses. KPCo is scheduled to file rebuttal testimony in November 2023. If any of these costs are not recoverable, it could reduce future net income and cash flows and impact financial condition.

OPCo Rate Matters (Applies to AEP and OPCo)

OVEC Cost Recovery Audits

In December 2021, as part of OVEC cost recovery audits pending before the PUCO, intervenors filed positions claiming that costs incurred by OPCo during the 2018-2019 audit period were imprudent and should be disallowed. In May 2022, intervenors filed for rehearing on the 2016-2017 OVEC cost recovery audit period claiming the PUCO’s April 2022 order to adopt the findings of the audit report were unjust, unlawful and unreasonable for multiple reasons, including the position that OPCo recovered imprudently incurred costs. In June 2022, the PUCO granted rehearing on the 2016-2017 audit period for purposes of further consideration.

In May 2023, as part of the OVEC cost recovery audits pending before the PUCO, intervenors filed positions claiming that costs incurred by OPCo during the 2020 audit period were imprudent and should be disallowed. A hearing is scheduled for the fourth quarter of 2023.

Management disagrees with these claims and is unable to predict the impact of these disputes. If any costs are disallowed or refunds are ordered, it could reduce future net income and cash flows and impact financial condition. See "OVEC" section of Note 17 in the 2022 Annual Report for additional information on AEP and OPCo’s investment in OVEC.

Ohio ESP Filings

In January 2023, OPCo filed an application with the PUCO to approve an ESP that included proposed rate adjustments, proposed new riders and the continuation and modification of certain existing riders, including the DIR, effective June 2024 through May 2030. The proposal includes a return on common equity of 10.65% on capital costs for certain riders. In June 2023, intervenors filed testimony opposing OPCo’s plan for various new riders and modifications to existing riders, including the DIR. In September 2023, OPCo and certain intervenors filed a settlement agreement with the PUCO addressing the ESP application. The settlement included a four year term from June 2024 through May 2028, an ROE of 9.7% and continuation of a number of riders including the DIR subject to revenue caps. An order from the PUCO is expected in the first quarter of 2024. If OPCo is ultimately not permitted to fully collect its ESP rates, it could reduce future net income and cash flows and impact financial condition.

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PSO Rate Matters (Applies to AEP and PSO)

2022 Oklahoma Base Rate Case

In November 2022, PSO filed a request with the OCC for a $173 million annual increase in rates based upon a 10.4% ROE with a capital structure of 45.4% debt and 54.6% common equity, net of existing rider revenues and certain incremental renewable facility benefits expected to be provided to customers through riders. The requested annual revenue increase included a $47 million annual depreciation expense increase related to the accelerated depreciation recovery of the Northeastern Plant, Unit 3 through 2026, and a $16 million annual amortization expense increase to recover intangible plant over a 5-year useful life instead of a 10-year useful life. PSO’s request also included recovery of the 154 MW Rock Falls Wind Facility through base rates to aid PSO’s near-term capacity needs and support compliance with SPP’s 2023 increased capacity planning reserve margin requirements. In November 2022, PSO entered into an agreement to acquire the Rock Falls Wind Facility. In February 2023, the FERC approved PSO’s acquisition of the Rock Falls Wind Facility under Section 203 of the Federal Power Act. PSO closed on the acquisition and placed the Rock Falls Wind Facility in-service on March 31, 2023. In addition, PSO requested an annual formula based rate tariff, with an initial one-year pilot term. In the event the requested formula based rate tariff was denied, PSO requested an expanded rider to recover certain distribution investments and related expenses as well as an expanded transmission cost recovery rider.

In March 2023, OCC staff and various intervenors filed testimony supporting net annual revenue changes ranging from a $42 million net decrease to a $49 million net increase based upon ROEs ranging from 8.6% to 9.5%. The difference between PSO’s request and OCC staff and intervenor testimony is primarily due to: (a) rejection of PSO’s request to accelerate the recovery of Northeastern Plant, Unit 3 from its original retirement date of 2040 to its projected retirement date of 2026, (b) rejection of PSO’s request to recover intangible plant over a 5-year useful life instead of a 10-year useful life, (c) recommended disallowance of approximately $9 million in certain distribution plant investments, (d) opposition to inclusion of the Rock Falls Wind Facility revenue requirement in customer rates before PSO’s next base rate case, (e) opposition to PSO’s inclusion of its deferred tax asset associated with net operating loss on a stand-alone tax basis in rate base and (f) lower recommended ROEs and recommendations to use certain hypothetical capital structures. Parties also recommended that the OCC reject PSO’s requested formula based rate, and alternate requests for expanded distribution investment and transmission cost recovery riders.

In May 2023, PSO, OCC staff and certain intervenors filed a contested joint stipulation and settlement agreement with the OCC that includes an annual revenue increase of $50 million, based upon a 9.5% ROE with a capital structure of 45.4% debt and 54.6% common equity, net of existing rider revenues and certain incremental renewable facility benefits expected to be provided to customers through riders. The net annual increase includes recovery of the 154 MW Rock Falls Wind Facility through base rates. Northeastern Plant, Unit 3 will continue to be recovered through 2040 and intangible plant will continue to be recovered over a 10-year useful life. The agreement also provides for certain rider-related items, including: (a) revision to PSO’s Fuel Clause Adjustment Rider to reflect factor updates to occur on a semi-annual basis, (b) approval to defer a weighted average cost of capital carrying charge on PSO’s deferred tax asset associated with net operating loss on a stand-alone tax basis to a regulatory asset and, contingent upon receipt of a supportive private letter ruling from the IRS, approval to collect the deferral through a rider over a 20-month period and (c) approval to implement an expanded rider to recover certain distribution investments for a three-year term, up to a $6 million annual revenue requirement.

In May 2023, a hearing on the merits of the contested joint stipulation and settlement agreement was held at the OCC and PSO implemented an interim annual base rate increase, subject to refund, based upon the contested joint stipulation and settlement agreement. In July 2023, an ALJ report was filed and included recommendations generally consistent with the intervenor testimony. The ALJ report is not binding on the OCC. Through September 30, 2023, PSO’s cumulative revenue from the interim annual base rate increase, subject to refund, is approximately $80 million. A final order is expected in the fourth quarter of 2023. If the OCC modifies the contested joint stipulation and settlement agreement and PSO is required to refund any of the $80 million of revenue recorded subject to refund or any costs are not recoverable, it could reduce future net income and cash flows and impact financial condition.

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SWEPCo Rate Matters (Applies to AEP and SWEPCo)

2012 Texas Base Rate Case

In 2012, SWEPCo filed a request with the PUCT to increase annual base rates primarily due to the completion of the Turk Plant. In 2013, the PUCT issued an order affirming the prudence of the Turk Plant but determined that the Turk Plant’s Texas jurisdictional capital cost cap established in a previous Certificate of Convenience and Necessity case also limited SWEPCo’s recovery of AFUDC in addition to limits on its recovery of cash construction costs.

Upon rehearing in 2014, the PUCT reversed its initial ruling and determined that AFUDC was excluded from the Turk Plant’s Texas jurisdictional capital cost cap. As a result, SWEPCo reversed $114 million of a previously recorded regulatory disallowance in 2013. In 2017, the Texas District Court upheld the PUCT’s 2014 order and intervenors filed appeals with the Texas Third Court of Appeals.

In August 2021, the Texas Third Court of Appeals reversed the Texas District Court judgment affirming the PUCT’s order on AFUDC, concluding that the language of the PUCT’s original 2008 order intended to include AFUDC in the Texas jurisdictional capital cost cap, and remanded the case to the PUCT for future proceedings. In November 2021, SWEPCo and the PUCT submitted Petitions for Review with the Texas Supreme Court. In October 2022, the Texas Supreme Court denied the Petitions for Review submitted by SWEPCo and the PUCT. In December 2022, SWEPCo and the PUCT filed requests for rehearing with the Texas Supreme Court. In June 2023, the Texas Supreme Court denied SWEPCo’s request for rehearing and the case was remanded to the PUCT for future proceedings. In October 2023, SWEPCo filed testimony with the PUCT in the remanded proceeding recommending no refund or disallowance.

Management does not believe a disallowance of capitalized Turk Plant costs or a revenue refund is probable as of September 30, 2023. However, if SWEPCo is ultimately unable to recover AFUDC in excess of the Texas jurisdictional capital cost cap, it would be expected to result in a pretax net disallowance ranging from $80 million to $90 million. In addition, if SWEPCo is ultimately unable to recover AFUDC in excess of the Texas jurisdictional cost cap, SWEPCo estimates it may be required to make customer refunds, including interest, ranging from $0 to $200 million related to revenues collected from February 2013 through September 2023 and such determination may reduce SWEPCo’s future revenues by approximately $15 million on an annual basis.

2016 Texas Base Rate Case

In 2016, SWEPCo filed a request with the PUCT for a net increase in Texas annual revenues of $69 million based upon a 10% ROE. In January 2018, the PUCT issued a final order approving a net increase in Texas annual revenues of $50 million based upon a ROE of 9.6%, effective May 2017. The final order also included: (a) approval to recover the Texas jurisdictional share of environmental investments placed in-service, as of June 30, 2016, at various plants, including Welsh Plant, Units 1 and 3, (b) approval of recovery of, but no return on, the Texas jurisdictional share of the net book value of Welsh Plant, Unit 2, (c) approval of $2 million in additional vegetation management expenses and (d) the rejection of SWEPCo’s proposed transmission cost recovery mechanism.

As a result of the final order, in 2017 SWEPCo: (a) recorded an impairment charge of $19 million, which included $7 million associated with the lack of return on Welsh Plant, Unit 2 and $12 million related to other disallowed plant investments, (b) recognized $32 million of additional revenues, for the period of May 2017 through December 2017, that was surcharged to customers in 2018 and (c) recognized an additional $7 million of expenses consisting primarily of depreciation expense and vegetation management expense, offset by the deferral of rate case expense. SWEPCo implemented new rates in February 2018 billings. The $32 million of additional 2017 revenues was collected during 2018. In March 2018, the PUCT clarified and corrected portions of the final order, without changing the overall decision or amounts of the rate change. The order has been appealed by various intervenors related to limiting SWEPCo’s recovery of AFUDC on Turk Plant and recovery of Welsh Plant, Unit 2. If certain parts of the PUCT order are overturned, it could reduce future net income and cash flows and impact financial condition.

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2020 Texas Base Rate Case

In October 2020, SWEPCo filed a request with the PUCT for a $105 million annual increase in Texas base rates based upon a proposed 10.35% ROE. The request would move transmission and distribution interim revenues recovered through riders into base rates. Eliminating these riders would result in a net annual requested base rate increase of $90 million primarily due to increased investments. SWEPCo subsequently filed a request with the PUCT lowering the requested annual increase in Texas base rates to $100 million which would result in an $85 million net annual base rate increase after moving the proposed riders to rate base.

In January 2022, the PUCT issued a final order approving an annual revenue increase of $39 million based upon a 9.25% ROE. The order also includes: (a) rates implemented retroactively back to March 18, 2021, (b) $5 million of the proposed increase related to vegetation management, (c) $2 million annually to establish a storm catastrophe reserve and (d) the creation of a rider to recover the Dolet Hills Power Station as if it were in rate base until its retirement at the end of 2021 and starting in 2022 the remaining net book value to be recovered as a regulatory asset through 2046. As a result of the final order, SWEPCo recorded a disallowance of $12 million in 2021 associated with the lack of return on the Dolet Hills Power Station. In February 2022, SWEPCo filed a motion for rehearing with the PUCT challenging several errors in the order, which include challenges of the approved ROE, the denial of a reasonable return or carrying costs on the Dolet Hills Power Station and the calculation of the Texas jurisdictional share of the storm catastrophe reserve. In April 2022, the PUCT denied the motion for rehearing. In May 2022, SWEPCo filed a petition for review with the Texas District Court seeking a judicial review of the several errors challenged in the PUCT’s final order.

2020 Louisiana Base Rate Case

In December 2020, SWEPCo filed a request with the LPSC for a $134 million annual increase in Louisiana base rates based upon a proposed 10.35% ROE. SWEPCo’s requested annual increase includes accelerated depreciation related to the Dolet Hills Power Station, Pirkey Power Plant and Welsh Plant, all of which were or are expected to be retired early. SWEPCo also included recovery of Welsh Plant, Unit 2 over the blended useful life of Welsh Plant, Units 1 and 3. SWEPCo subsequently revised the requested annual increase to $95 million to reflect removing hurricane storm restoration costs from the base case filing, to modify the proposed recovery of the Dolet Hills Power Station and revisions to various proposed amortizations. The hurricane costs have been requested in a separate storm filing. See “2021 Louisiana Storm Cost Filing” below for more information.

In January 2023, the LPSC approved a settlement which provides for an annual revenue increase of $27 million based upon a 9.5% ROE and includes: (a) a $21 million increase in base rates effective February 2023, (b) a $14 million rider to recover costs of the Dolet Hills Power Station and Pirkey Plant including a return, (c) an $8 million reduction in fuel rates, (d) adoption of a 3-year formula rate term subject to an earnings band and (e) the recovery of certain incremental SPP charges net of associated revenue and the Louisiana jurisdictional share of the return on and of projected transmission capital investment outside of the earnings band. The settlement agreement did not rule on the prudency of the early retirement of the Dolet Hills Power Station, which is being addressed in a separate proceeding.

The primary differences between SWEPCo’s requested annual rate increase and the agreed upon settlement increase are primarily due to: (a) a reduction in the requested ROE, (b) recovery of the Dolet Hills Power Station and Pirkey Plant over ten years in a separate rider mechanism as opposed to base rates with accelerated depreciation rates, (c) maintaining existing depreciation rates for Welsh Plant, Units 1 and 3 and (d) the severing of SWEPCo’s proposed adjustment to include a stand-alone NOLC deferred tax asset in rate base.

In January 2023, a hearing was held related to the inclusion of a stand-alone NOLC deferred tax asset in rate base. In September 2023, an order was received from the LPSC directing SWEPCo to seek a private letter ruling from the IRS to address the matter.

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2021 Louisiana Storm Cost Filing

In 2020, Hurricanes Laura and Delta caused power outages and extensive damage to the SWEPCo service territories, primarily impacting the Louisiana jurisdiction. Following both hurricanes, the LPSC issued orders allowing Louisiana utilities, including SWEPCo, to establish regulatory assets to track and defer expenses associated with these storms. In February 2021, severe winter weather impacted the Louisiana jurisdiction and in March 2021, the LPSC approved the deferral of incremental storm restoration expenses related to the winter storm. In March 2023, SWEPCo and the LPSC staff filed a joint stipulation and settlement agreement with the LPSC which confirmed the prudency of $150 million of deferred incremental storm restoration expenses. The agreement also authorized an interim carrying charge at a rate of 3.125% until the recovery mechanism is determined in phase two of this proceeding. In April 2023, the LPSC issued an order approving the stipulation and settlement agreement. In July 2023, SWEPCo submitted additional information in phase two of this proceeding to obtain a financing order and prudency review of capital investment.

February 2021 Severe Winter Weather Impacts in SPP

In February 2021, severe winter weather had a significant impact in SPP, resulting in significantly increased market prices for natural gas power plants to meet reliability needs for the SPP electric system. For the time period of February 9, 2021, to February 20, 2021, SWEPCo’s natural gas expenses and purchases of electricity still to be recovered from customers are shown in the table below:

Jurisdiction	September 30, 2023		December 31, 2022		Approved Recovery Period	Approved Carrying Charge
	(in millions)
Arkansas	$	59.4	$	74.9	6 years	(a)
Louisiana	101.4		121.7		(b)	(b)
Texas	108.6		132.4		5 years	1.65%
Total	$	269.4	$	329.0

(a)SWEPCo is permitted to record carrying costs on the unrecovered balance of fuel costs at a weighted-cost of capital approved by the APSC. The APSC will conduct an audit of these costs in 2024. SWEPCo’s direct testimony in support of the costs is due in December 2023.

(b)In March 2021, the LPSC approved a special order granting a temporary modification to the FAC and shortly after SWEPCo began recovery of its Louisiana jurisdictional share of these fuel costs based on a five-year recovery period inclusive of an interim carrying charge equal to the prime rate. The special order states the fuel and purchased power costs incurred will be subject to a future LPSC audit.

If SWEPCo is unable to recover any of the costs relating to the extraordinary fuel and purchases of electricity, or obtain authorization of a reasonable carrying charge on these costs, it could reduce future net income and cash flows and impact financial condition.

FERC Rate Matters

FERC 2019 SPP Transmission Formula Rate Challenge (Applies to AEP, AEPTCo, PSO and SWEPCo)

In May 2021, certain joint customers submitted a formal challenge at the FERC related to the 2020 Annual Update of the 2019 SPP Transmission Formula Rates of the AEP transmission owning subsidiaries within SPP. In March 2022, the FERC issued an order on the formal challenge which ruled in favor of the joint customers on several issues. Management has determined that the result of the order had an immaterial impact to the financial statements of AEP, AEPTCo, PSO and SWEPCo. In November 2022, certain joint customers appealed the FERC decision to the U.S. Court of Appeals for the District of Columbia Circuit.

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Independence Energy Connection Project (Applies to AEP)

In 2016, PJM approved the Independence Energy Connection Project (IEC) and included it in its Regional Transmission Expansion Plan to alleviate congestion. Transource Energy has an ownership interest in the IEC, which is located in Maryland and Pennsylvania. In June 2020, the Maryland Public Service Commission approved a Certificate of Public Convenience and Necessity to construct the portion of the IEC in Maryland. In May 2021, the Pennsylvania Public Utility Commission (PAPUC) denied the IEC certificate for siting and construction of the portion in Pennsylvania. Transource Energy appealed the PAPUC ruling in Pennsylvania state court and challenged the ruling before the United States District Court for the Middle District of Pennsylvania. In May 2022, the Pennsylvania state court issued an order affirming the PAPUC decision. The PAPUC decision remains subject to the jurisdiction and review of the United States District Court for the Middle District of Pennsylvania, which had stayed review of the PAPUC decision until the Pennsylvania state court had ordered. The procedural schedule for this case states that a decision by the United States District Court for the Middle of Pennsylvania will not be reached until the second half of 2023.

In September 2021, PJM notified Transource Energy that the IEC was suspended to allow for the regulatory and related appeals process to proceed in an orderly manner without breaching milestone dates in the project agreement. At that time, PJM stated that the IEC has not been cancelled and remains necessary to alleviate congestion. PJM continues to evaluate reliability and market efficiency in the area. As of September 30, 2023, AEP’s share of IEC capital expenditures was approximately $92 million, located in Total Property, Plant and Equipment - Net on AEP’s balance sheets. The FERC has previously granted abandonment benefits for this project, allowing the full recovery of prudently incurred costs if the project is cancelled for reasons outside the control of Transource Energy. If any of the IEC costs are not recoverable, it could reduce future net income and cash flows and impact financial condition.

FERC RTO Incentive Complaint (Applies to AEP, AEPTCo and OPCo)

In February 2022, the OCC filed a complaint against AEPSC, American Transmission Systems, Inc. and Duke Energy Ohio, alleging the 50 basis point RTO incentive included in Ohio Transmission Owners’ respective transmission formula rates is not just and reasonable and therefore should be eliminated on the basis that RTO participation is not voluntary, but rather is required by Ohio law. In March 2022, AEPSC filed a motion to dismiss the OCC’s February 2022 complaint with the FERC on the basis of certain deficiencies, including that the complaint fails to request relief that can be granted under FERC regulations because AEPSC is not a public utility nor does it have a transmission rate on file with the FERC. In December 2022, the FERC issued an order removing the 50 basis point RTO incentive from OPCo and OHTCo transmission formula rates effective the date of the February 2022 complaint filing and directed OPCo and OHTCo to provide refunds, with interest, within sixty days of the date of its order. In January 2023, both AEPSC and the OCC filed requests for rehearing with the FERC. In February 2023, in compliance with the FERC’s December 2022 order, AEPSC submitted a filing to the FERC to update OPCo and OHTCo 2023 transmission formula rates to exclude the 50 basis point RTO incentive and provide refunds with interest. In April 2023, the FERC approved the updated transmission formula rates for OPCo and OHTCo and issued an Order on Rehearing affirming its December 2022 decision. Management expects the December 2022 FERC order to reduce AEP’s pretax income by approximately $20 million on an annual basis. This decision has been appealed to the U.S. Court of Appeals for the Sixth Circuit.

Request to Update AEGCo Depreciation Rates (Applies to AEP and I&M)

In October 2022, AEP, on behalf of AEGCo, submitted proposed revisions to AEGCo’s depreciation rates for its 50% ownership interest in Rockport Plant, Unit 1 and Unit 2, reflected in the UPA between AEGCo and I&M. The proposed depreciation rates for these assets reflect an estimated 2028 retirement date for the Rockport Plant. AEGCo’s previous FERC-approved depreciation rates for Rockport Plant, Unit 1 were based upon a December 31, 2028 estimated retirement date while AEGCo’s previous FERC-approved depreciation rates for Rockport Plant, Unit 2 leasehold improvements were based upon a December 31, 2022 estimated retirement date in conjunction with the termination of the Rockport Plant, Unit 2 lease.

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In December 2022, the FERC issued an order approving the proposed AEGCo Rockport depreciation rates effective January 1, 2023, subject to further review and a potential refund. The FERC established a separate proceeding to review: (a) AEGCo’s acquisition value for the Rockport Plant, Unit 2 base generating asset (original cost and accumulated depreciation), (b) the appropriateness of including future capital additions as stated components in proposed depreciation rates, in light of the UPA’s formula rate mechanism, (c) the appropriateness of applying two different depreciation rates to a single asset common to both units and (d) the accounting and regulatory treatment of Rockport Plant, Unit 2 costs of removal and related AROs. In August 2023, AEGCo reached a settlement agreement with the FERC Trial Staff that resolves all issues set for hearing. In September 2023, the settlement agreement was certified to the FERC. An order from the FERC on this settlement agreement is expected in the fourth quarter of 2023. If the FERC finalizes the settlement agreement as proposed, management anticipates the results of the order will not have a material impact on financial condition, results of operations or cash flows.

FERC 2021 PJM and SPP Transmission Formula Rate Challenge (Applies to AEP, AEPTCo, APCo, I&M, PSO and SWEPCo)

In March 2023 and May 2023, certain joint customers submitted a complaint and a formal challenge at the FERC related to the 2022 Annual Update of the 2021 Transmission Formula Rates of the AEP transmission owning subsidiaries within PJM and SPP, respectively. These challenges primarily relate to stand-alone treatment of NOLCs in the transmission formula rates of the AEP transmission owning subsidiaries. AEPSC, on behalf of the AEP transmission owning subsidiaries within PJM and SPP, filed answers to the joint formal challenge and complaint with the FERC in the second quarter of 2023.

The Registrants transitioned to stand-alone treatment of NOLCs in its PJM and SPP transmission formula rates beginning with the 2022 projected transmission revenue requirements and 2021 true-up to actual transmission revenue requirements, and provided notice of this change in informational filings made with the FERC. Stand-alone treatment of the NOLCs for transmission formula rates increased the annual revenue requirements for years 2023, 2022 and 2021 by $60 million, $69 million and $78 million, respectively. Through the third quarter of 2023, the Registrants’ financial statements reflect a provision for refund for certain NOLC revenues billed by PJM and SPP. If the Registrants are required to make refunds as a result of these challenges, it could reduce future net income and cash flows and impact financial condition.

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5.  COMMITMENTS, GUARANTEES AND CONTINGENCIES

The disclosures in this note apply to all Registrants unless indicated otherwise.

The Registrants are subject to certain claims and legal actions arising in the ordinary course of business.  In addition, the Registrants’ business activities are subject to extensive governmental regulation related to public health and the environment.  The ultimate outcome of such pending or potential litigation against the Registrants cannot be predicted.  Management accrues contingent liabilities only when management concludes that it is both probable that a liability has been incurred at the date of the financial statements and the amount of loss can be reasonably estimated. When management determines that it is not probable, but rather reasonably possible that a liability has been incurred at the date of the financial statements, management discloses such contingencies and the possible loss or range of loss if such estimate can be made. Any estimated range is based on currently available information and involves elements of judgment and significant uncertainties. Any estimated range of possible loss may not represent the maximum possible loss exposure. Circumstances change over time and actual results may vary significantly from estimates.

For current proceedings not specifically discussed below, management does not anticipate that the liabilities, if any, arising from such proceedings would have a material effect on the financial statements. The Commitments, Guarantees and Contingencies note within the 2022 Annual Report should be read in conjunction with this report.

GUARANTEES

Liabilities for guarantees are recorded in accordance with the accounting guidance for “Guarantees.”  There is no collateral held in relation to any guarantees.  In the event any guarantee is drawn, there is no recourse to third-parties unless specified below.

Letters of Credit (Applies to AEP, AEP Texas, APCo and I&M)

Standby letters of credit are entered into with third-parties.  These letters of credit are issued in the ordinary course of business and cover items such as natural gas and electricity risk management contracts, construction contracts, insurance programs, security deposits and debt service reserves.

AEP has $4 billion and $1 billion revolving credit facilities due in March 2027 and 2025, respectively, under which up to $1.2 billion may be issued as letters of credit on behalf of subsidiaries. As of September 30, 2023, no letters of credit were issued under the revolving credit facility.

An uncommitted facility gives the issuer of the facility the right to accept or decline each request made under the facility.  AEP issues letters of credit on behalf of subsidiaries under six uncommitted facilities totaling $450 million. The Registrants’ maximum future payments for letters of credit issued under the uncommitted facilities as of September 30, 2023 were as follows:

Company	Amount		Maturity
	(in millions)
AEP	$	249.1	October 2023 to September 2024
AEP Texas	1.8		July 2024
APCo	6.3		September 2024
I&M	2.9		September 2024

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Indemnifications and Other Guarantees

Contracts

The Registrants enter into certain types of contracts which require indemnifications.  Typically these contracts include, but are not limited to, sale agreements, lease agreements, purchase agreements and financing agreements.  Generally, these agreements may include, but are not limited to, indemnifications around certain tax, contractual and environmental matters.  With respect to sale agreements, exposure generally does not exceed the sale price.  As of September 30, 2023, there were no material liabilities recorded for any indemnifications.

AEPSC conducts power purchase-and-sale activity on behalf of APCo, I&M, KPCo and WPCo, who are jointly and severally liable for activity conducted on their behalf.  AEPSC also conducts power purchase-and-sale activity on behalf of PSO and SWEPCo, who are jointly and severally liable for activity conducted on their behalf.

Master Lease Agreements (Applies to all Registrants except AEPTCo)

The Registrants lease certain equipment under master lease agreements.  Under the lease agreements, the lessor is guaranteed a residual value up to a stated percentage of the equipment cost at the end of the lease term. If the actual fair value of the leased equipment is below the guaranteed residual value at the end of the lease term, the Registrants are committed to pay the difference between the actual fair value and the residual value guarantee.  Historically, at the end of the lease term the fair value has been in excess of the amount guaranteed.  As of September 30, 2023, the maximum potential loss by the Registrants for these lease agreements assuming the fair value of the equipment is zero at the end of the lease term was as follows:

Company	Maximum Potential Loss
	(in millions)
AEP	$	44.8
AEP Texas	10.9
APCo	5.6
I&M	4.2
OPCo	6.9
PSO	4.7
SWEPCo	5.3

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ENVIRONMENTAL CONTINGENCIES (Applies to all Registrants except AEPTCo)

The Comprehensive Environmental Response Compensation and Liability Act (Superfund) and State Remediation

By-products from the generation of electricity include materials such as ash, slag, sludge, low-level radioactive waste and SNF.  Coal combustion by-products, which constitute the overwhelming percentage of these materials, are typically treated and deposited in captive disposal facilities or are beneficially utilized.  In addition, the generation plants and transmission and distribution facilities have used asbestos, polychlorinated biphenyls and other hazardous and non-hazardous materials.  The Registrants currently incur costs to dispose of these substances safely. For remediation processes not specifically discussed, management does not anticipate that the liabilities, if any, arising from such remediation processes would have a material effect on the financial statements.

NUCLEAR CONTINGENCIES (Applies to AEP and I&M)

I&M owns and operates the Cook Plant under licenses granted by the Nuclear Regulatory Commission.  I&M has a significant future financial commitment to dispose of SNF and to safely decommission and decontaminate the plant.  The licenses to operate the two nuclear units at the Cook Plant expire in 2034 and 2037.  The operation of a nuclear facility also involves special risks, potential liabilities and specific regulatory and safety requirements.  By agreement, I&M is partially liable, together with all other electric utility companies that own nuclear generation units, for a nuclear power plant incident at any nuclear plant in the U.S. Should a nuclear incident occur at any nuclear power plant in the U.S., the resultant liability could be substantial.

OPERATIONAL CONTINGENCIES

Litigation Related to Ohio House Bill 6 (HB 6)

In 2019, Ohio adopted and implemented HB 6 which benefits OPCo by authorizing rate recovery for certain costs including renewable energy contracts and OVEC’s coal-fired generating units. OPCo engaged in lobbying efforts and provided testimony during the legislative process in connection with HB 6. In July 2020, an investigation led by the U.S. Attorney’s Office resulted in a federal grand jury indictment of an Ohio legislator and associates in connection with an alleged racketeering conspiracy involving the adoption of HB 6. After AEP learned of the criminal allegations against the Ohio legislator and others relating to HB 6, AEP, with assistance from outside advisors, conducted a review of the circumstances surrounding the passage of the bill. Management does not believe that AEP was involved in any wrongful conduct in connection with the passage of HB 6.

In August 2020, an AEP shareholder filed a putative class action lawsuit in the U. S. District Court for the Southern District of Ohio against AEP and certain of its officers for alleged violations of securities laws. In December 2021, the district court issued an opinion and order dismissing the securities litigation complaint with prejudice, determining that the complaint failed to plead any actionable misrepresentations or omissions. The plaintiffs did not appeal the ruling.

In January 2021, an AEP shareholder filed a derivative action in the U.S. District Court for the Southern District of Ohio purporting to assert claims on behalf of AEP against certain AEP officers and directors. In February 2021, a second AEP shareholder filed a similar derivative action in the Court of Common Pleas of Franklin County, Ohio. In April 2021, a third AEP shareholder filed a similar derivative action in the U.S. District Court for the Southern District of Ohio and a fourth AEP shareholder filed a similar derivative action in the Supreme Court for the State of New York, Nassau County. These derivative complaints allege the officers and directors made misrepresentations and omissions similar to those alleged in the putative securities class action lawsuit filed against AEP. The derivative complaints together assert claims for: (a) breach of fiduciary duty, (b) waste of corporate assets, (c) unjust enrichment, (d) breach of duty for insider trading and (e) contribution for violations of sections 10(b) and 21D of the Securities Exchange Act of 1934; and seek monetary damages and changes to AEP’s corporate governance and internal policies among other forms of relief. The court entered a scheduling order in the New York state court derivative action staying the case other than with respect to briefing the motion to dismiss. AEP filed substantive and forum-based motions to dismiss on April 29, 2022. On September 13, 2022, the New York state

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court granted the forum-based motion to dismiss with prejudice and the plaintiff subsequently filed a notice of appeal with the New York appellate court. On January 20, 2023, the New York plaintiff filed a motion to intervene in the pending Ohio federal court action and withdrew his appeal in New York. The two derivative actions pending in federal district court in Ohio have been consolidated and the plaintiffs in the consolidated action filed an amended complaint. AEP filed a motion to dismiss the amended complaint and subsequently filed a brief in opposition to the New York plaintiffs’ motion to intervene in the consolidated action in Ohio. On March 20, 2023, the federal district court issued an order granting the motion to dismiss with prejudice and denying the New York plaintiffs’ motion to intervene. On April 20, 2023, one of the plaintiffs filed a notice of appeal to the U.S. Court of Appeals for the Sixth Circuit of the Ohio federal district court order dismissing the consolidated action and denying the intervention. On June 15, 2022, the Ohio state court entered an order continuing the stays of that case until the final resolution of the consolidated derivative actions pending in Ohio federal district court. The defendants will continue to defend against the claims. Management is unable to determine a range of potential losses that is reasonably possible of occurring.

In March 2021, AEP received a litigation demand letter from counsel representing a purported AEP shareholder. The litigation demand letter was directed to the Board of Directors of AEP (AEP Board) and contained factual allegations involving HB 6 that were generally consistent with those in the derivative litigation filed in state and federal court. The shareholder that sent the letter has since withdrawn the litigation demand, which is now terminated and of no further effect. In April 2023, AEP received a litigation demand from counsel representing the purported AEP shareholder who filed the dismissed derivative action in New York state court and unsuccessfully tried to intervene in the consolidated derivative actions in Ohio federal court. The litigation demand letter is directed to the AEP Board and contains factual allegations involving HB 6 that are generally consistent with those in the derivative litigation filed in state and federal court. The letter demands, among other things, that the AEP Board undertake an independent investigation into alleged legal violations by certain current and former directors and officers, and that AEP commence a civil action for breaches of fiduciary duty and related claims against any individuals who allegedly harmed AEP. The AEP Board will act in response to the letter as appropriate. Management is unable to determine a range of potential losses that is reasonably possible of occurring.

In May 2021, AEP received a subpoena from the SEC’s Division of Enforcement seeking various documents, including documents relating to the passage of HB 6 and documents relating to AEP’s policies and financial processes and controls. In August 2022, AEP received a second subpoena from the SEC seeking various additional documents relating to its ongoing investigation. AEP is cooperating fully with the SEC’s investigation, which has included taking testimony from certain individuals and inquiries regarding Empowering Ohio’s Economy, Inc., which is a 501(c)(4) social welfare organization, and related disclosures. AEP and the SEC are engaged in discussions about a possible resolution of the SEC’s investigation and potential claims under the securities laws, the outcome of which cannot be predicted and could subject AEP to civil penalties and other remedial measures. Management is unable to determine a range of potential losses that is reasonably possible of occurring, but management does not believe the results of this investigation or a possible resolution thereof will have a material impact on results of operations, cash flows or financial condition.

Claims for Indemnification Made by Owners of the Gavin Power Station

In November 2022, the Federal EPA issued a final decision denying Gavin Power LLC’s requested extension to allow a CCR surface impoundment at the Gavin Power Station to continue to receive CCR and non-CCR waste streams after April 11, 2021 until May 4, 2023 (the Gavin Denial). As part of the Gavin Denial, the Federal EPA made several determinations related to the CCR Rule (see “Environmental Issues - CCR Rule” section of Management’s Discussion and Analysis of Financial Condition and Results of Operations for additional information), including a determination that the closure of the 300 acre unlined fly ash reservoir (FAR) is noncompliant with the CCR Rule in multiple respects. The Gavin Power Station was formerly owned and operated by AEP and was sold to Gavin Power LLC and Lightstone Generation LLC in 2017. Pursuant to the PSA, AEP maintained responsibility to complete closure of the FAR in accordance with the closure plan approved by the Ohio EPA which was completed in July 2021. The PSA contains indemnification provisions, pursuant to which the owners of the Gavin Power Station have notified AEP they believe they are entitled to indemnification for any damages that may result from these claims, including any future enforcement or litigation resulting from the Federal EPA’s determinations of noncompliance with various aspects of the CCR Rule as part of the Gavin Denial. The owners of the Gavin Power Station have also sought indemnification for landowner claims for property damage

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allegedly caused by modifications to the FAR. Management does not believe that the owners of the Gavin Power Station have any valid claim for indemnity or otherwise against AEP under the PSA. In addition, Gavin Power LLC, several AEP subsidiaries, and other parties have filed Petitions for Review of the Gavin Denial with the U.S. Court of Appeals for the District of Columbia Circuit. Management is unable to determine a range of potential losses that is reasonably possible of occurring.

Claims for Damages Related to Sabine Lignite Mining Agreement

In May 2023, North American Coal Corporation (NACC) and Sabine, a subsidiary of NACC, filed suit against SWEPCo in Texas state court for breach of the Lignite Mining Agreement (LMA) between Sabine and SWEPCo. NACC and Sabine assert that the terms of the LMA require SWEPCo to continue operating the Pirkey Plant and obtaining coal from the Sabine mine through 2035 and that SWEPCo has breached the agreement by closing the plant. In August 2023, a settlement agreement was reached and the suit was dismissed by the Texas state court. The settlement agreement did not have a material impact on SWEPCo’s net income, cash flows or financial condition.

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6. ACQUISITIONS, DISPOSITIONS AND IMPAIRMENTS

The disclosures in this note apply to AEP unless indicated otherwise.

ACQUISITIONS

North Central Wind Energy Facilities (Vertically Integrated Utilities Segment) (Applies to AEP, PSO and SWEPCo)

In 2020, PSO and SWEPCo received regulatory approvals to acquire the NCWF, comprised of three Oklahoma wind facilities totaling 1,484 MWs, on a fixed cost turn-key basis. PSO and SWEPCo own undivided interests of 45.5% and 54.5% of the NCWF, respectively. In total, the three wind facilities cost approximately $2 billion and consist of Traverse (998 MW), Maverick (287 MW) and Sundance (199 MW). Output from the NCWF serves retail load in PSO’s Oklahoma service territory and both retail and FERC wholesale load in SWEPCo’s service territories in Arkansas and Louisiana. The Oklahoma and Louisiana portions of the NCWF revenue requirement, net of PTC benefit, are recoverable through authorized riders until the amounts are reflected in base rates. Recovery of the Arkansas portion of the NCWF revenue requirement through base rates was approved by the APSC in May 2022. The NCWF are subject to various regulatory performance requirements. If these performance requirements are not met, PSO and SWEPCo would recognize a regulatory liability to refund retail customers.

In March 2022, PSO and SWEPCo acquired respective undivided ownership interests in the entity that owned Traverse during its development and construction for $1.2 billion, the third of the three NCWF acquisitions. Immediately following the acquisition, PSO and SWEPCo liquidated the entity and simultaneously distributed the Traverse assets in proportion to their undivided ownership interests. Traverse was placed in-service in March 2022. PSO and SWEPCo apply the joint plant accounting model to account for their respective undivided interests in the assets, liabilities, revenues and expenses of the NCWF projects.

Rock Falls Wind Facility (Vertically Integrated Utilities Segment) (Applies to AEP and PSO)

In November 2022, PSO entered into an agreement to acquire the Rock Falls Wind Facility. In February 2023, the FERC approved PSO’s acquisition of the Rock Falls Wind Facility under Section 203 of the Federal Power Act. In March 2023, PSO acquired an ownership interest in the entity that owned Rock Falls during its development and construction for $146 million. In accordance with the guidance for “Business Combinations,” AEP management determined that the acquisition of the Rock Falls Wind Facility represents an asset acquisition. The current and noncurrent Obligations Under Operating Leases related to Rock Falls were not material as of September 30, 2023. See the “2022 Oklahoma Base Rate Case” section of Note 4 for additional information.

DISPOSITIONS

Termination of Planned Disposition of KPCo and KTCo (Vertically Integrated Utilities and AEP Transmission Holdco Segments) (Applies to AEP and AEPTCo)

In October 2021, AEP entered into a Stock Purchase Agreement (SPA) to sell KPCo and KTCo to Liberty Utilities Co., a subsidiary of Algonquin Power & Utilities Corp. (Liberty), for approximately a $2.85 billion enterprise value. The SPA was subsequently amended in September 2022 to reduce the purchase price to approximately $2.646 billion. The sale required approval from the KPSC and from the FERC under Section 203 of the Federal Power Act. The SPA contained certain termination rights if the closing of the sale did not occur by April 26, 2023.

In May 2022, the KPSC approved the sale of KPCo to Liberty subject to certain conditions contingent upon the closing of the sale. In December 2022, the FERC issued an order denying, without prejudice, authorization of the proposed sale stating the applicants failed to demonstrate the proposed transaction will not have an adverse effect on rates. In February 2023, a new filing for approval under Section 203 of the Federal Power Act was submitted. In March 2023, the KPSC and other intervenors made filings recommending the FERC reject AEP and Liberty’s new Section 203 application seeking approval of the sale.

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In April 2023, AEP, AEPTCo and Liberty entered into a Mutual Termination Agreement (Termination Agreement) terminating the SPA. The parties entered into the Termination Agreement as all of the conditions precedent to closing the sale could not be satisfied prior to April 26, 2023.

The impact of the Termination Agreement did not have a material impact on AEP’s statements of income for the three and nine months ended September 30, 2023. Upon reverting to a held and used model in the first quarter of 2023, AEP was required to present its investment in the Kentucky Operations at the lower of fair value or historical carrying value which resulted in a $335 million reduction recorded in Property, Plant and Equipment. The reduced investment in KPCo’s assets is being amortized over the 30-year average useful life of the KPCo assets.

Disposition of the Competitive Contracted Renewables Portfolio (Generation & Marketing Segment)

(Applies to AEP)

In February 2022, AEP management announced the initiation of a process to sell all or a portion of AEP Renewables’ competitive contracted renewables portfolio (the portfolio) within the Generation & Marketing segment. In late January 2023, AEP received final bids from interested parties. In February 2023, AEP’s Board of Directors approved management’s plan to sell the portfolio and AEP signed an agreement with a nonaffiliated party. AEP recorded a pretax loss of $112 million ($88 million after-tax) in the first quarter of 2023 after reaching Held for Sale status and determining the carrying value of the portfolio exceeded the estimated fair value.

In August 2023, AEP completed the sale of the entire portfolio to the nonaffiliated party and received cash proceeds of approximately $1.2 billion, net of taxes and transaction costs.

Disposition of Mineral Rights (Generation & Marketing Segment) (Applies to AEP)

In June 2022, AEP closed on the sale of certain mineral rights to a nonaffiliated third-party and received $120 million of proceeds. The sale resulted in a pretax gain of $116 million in the second quarter of 2022.

IMPAIRMENTS

Flat Ridge 2 Wind LLC (Generation & Marketing Segment) (Applies to AEP)

In 2019, AEP acquired a 50% ownership interest in five non-consolidated joint ventures, including Flat Ridge 2 Wind LLC (Flat Ridge 2), and two tax equity partnerships. The five non-consolidated joint ventures are jointly owned and operated by BP Wind Energy. Flat Ridge 2 sells electricity to three counterparties through long-term PPAs.

Regarding AEP’s investment in Flat Ridge 2, In June 2022, as a result of Flat Ridge 2’s deteriorating financial performance, sale negotiations and AEP’s ongoing evaluation and ultimate decision to exit the investment in the near term, AEP determined a decline in the fair value of AEP’s investment in Flat Ridge 2 was other than temporary. In accordance with the accounting guidance for “Investments - Equity Method and Joint Ventures”, in the second quarter of 2022 AEP recorded a pretax other than temporary impairment charge of $186 million which is presented in Equity Earnings (Losses) of Unconsolidated Subsidiaries on AEP’s Statement of Income. AEP’s determination of fair value utilized the accounting guidance for Fair Value Measurement market approach to valuation and was based on negotiations to sell the investment to a non-affiliate. In the third quarter of 2022, AEP recorded an additional $2 million pretax other than temporary impairment charge which is presented in Equity Earnings (Losses) of Unconsolidated Subsidiaries on AEP’s Statement of Income. In September 2022, AEP signed a Purchase and Sale Agreement with a nonaffiliate for AEP’s interest in Flat Ridge 2. The transaction closed in the fourth quarter of 2022 and had an immaterial impact on the financial statements at closing.

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7.  BENEFIT PLANS

The disclosures in this note apply to all Registrants except AEPTCo.

AEP sponsors a qualified pension plan and two unfunded nonqualified pension plans.  Substantially all AEP employees are covered by the qualified plan or both the qualified and a nonqualified pension plan.  AEP also sponsors OPEB plans to provide health and life insurance benefits for retired employees.

Components of Net Periodic Benefit Cost (Credit)

Pension Plans

Three Months Ended September 30, 2023	AEP		AEP Texas		APCo		I&M		OPCo		PSO		SWEPCo
	(in millions)
Service Cost	$	23.6	$	2.1	$	2.3	$	2.9	$	2.1	$	1.4	$	2.0
Interest Cost	54.8		4.5		6.6		6.3		5.0		2.7		3.4
Expected Return on Plan Assets	(84.8)		(7.0)		(11.2)		(11.0)		(8.6)		(4.6)		(4.8)
Amortization of Net Actuarial Loss	0.3		—		—		—		—		—		—
Net Periodic Benefit Cost (Credit)	$	(6.1)	$	(0.4)	$	(2.3)	$	(1.8)	$	(1.5)	$	(0.5)	$	0.6

Three Months Ended September 30, 2022	AEP		AEP Texas		APCo		I&M		OPCo		PSO		SWEPCo
	(in millions)
Service Cost	$	30.7	$	2.8	$	2.9	$	4.0	$	2.8	$	1.8	$	2.7
Interest Cost	37.1		3.1		4.3		4.3		3.4		1.8		2.2
Expected Return on Plan Assets	(63.4)		(5.3)		(8.1)		(8.1)		(6.2)		(3.3)		(3.6)
Amortization of Net Actuarial Loss	15.8		1.2		1.9		1.8		1.3		0.7		0.9
Net Periodic Benefit Cost	$	20.2	$	1.8	$	1.0	$	2.0	$	1.3	$	1.0	$	2.2

Nine Months Ended September 30, 2023	AEP		AEP Texas		APCo		I&M		OPCo		PSO		SWEPCo
	(in millions)
Service Cost	$	70.8	$	6.2	$	6.8	$	8.9	$	6.3	$	4.2	$	5.8
Interest Cost	164.4		13.7		19.8		18.7		14.9		8.1		10.4
Expected Return on Plan Assets	(254.4)		(21.0)		(33.5)		(33.1)		(25.6)		(13.8)		(14.5)
Amortization of Net Actuarial Loss	1.0		—		—		—		—		—		—
Net Periodic Benefit Cost (Credit)	$	(18.2)	$	(1.1)	$	(6.9)	$	(5.5)	$	(4.4)	$	(1.5)	$	1.7

Nine Months Ended September 30, 2022	AEP		AEP Texas		APCo		I&M		OPCo		PSO		SWEPCo
	(in millions)
Service Cost	$	92.3	$	8.4	$	8.6	$	12.1	$	8.4	$	5.5	$	8.0
Interest Cost	111.2		9.1		13.1		12.7		10.0		5.3		6.8
Expected Return on Plan Assets	(190.1)		(15.8)		(24.3)		(24.2)		(18.6)		(10.1)		(10.9)
Amortization of Net Actuarial Loss	47.3		3.8		5.5		5.3		4.1		2.2		2.8
Net Periodic Benefit Cost	$	60.7	$	5.5	$	2.9	$	5.9	$	3.9	$	2.9	$	6.7

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OPEB

Three Months Ended September 30, 2023	AEP		AEP Texas		APCo		I&M		OPCo		PSO		SWEPCo
	(in millions)
Service Cost	$	1.1	$	0.1	$	0.1	$	0.1	$	0.1	$	0.1	$	—
Interest Cost	11.6		0.9		1.8		1.3		1.2		0.6		0.8
Expected Return on Plan Assets	(27.4)		(2.2)		(4.0)		(3.3)		(2.9)		(1.5)		(1.8)
Amortization of Prior Service Credit	(15.8)		(1.3)		(2.3)		(2.2)		(1.6)		(1.0)		(1.3)
Amortization of Net Actuarial Loss	3.7		0.3		0.6		0.5		0.4		0.2		0.3
Net Periodic Benefit Credit	$	(26.8)	$	(2.2)	$	(3.8)	$	(3.6)	$	(2.8)	$	(1.6)	$	(2.0)

Three Months Ended September 30, 2022	AEP		AEP Texas		APCo		I&M		OPCo		PSO		SWEPCo
	(in millions)
Service Cost	$	1.8	$	0.1	$	0.2	$	0.2	$	0.2	$	0.2	$	0.1
Interest Cost	7.3		0.6		1.2		0.8		0.7		0.4		0.5
Expected Return on Plan Assets	(27.5)		(2.3)		(4.1)		(3.3)		(3.0)		(1.6)		(1.8)
Amortization of Prior Service Credit	(17.9)		(1.5)		(2.6)		(2.4)		(1.8)		(1.1)		(1.4)
Net Periodic Benefit Credit	$	(36.3)	$	(3.1)	$	(5.3)	$	(4.7)	$	(3.9)	$	(2.1)	$	(2.6)

Nine Months Ended September 30, 2023	AEP		AEP Texas		APCo		I&M		OPCo		PSO		SWEPCo
	(in millions)
Service Cost	$	3.4	$	0.3	$	0.4	$	0.5	$	0.3	$	0.2	$	0.2
Interest Cost	34.7		2.7		5.5		4.0		3.5		1.8		2.2
Expected Return on Plan Assets	(82.2)		(6.7)		(12.0)		(10.1)		(8.8)		(4.4)		(5.4)
Amortization of Prior Service Credit	(47.3)		(4.0)		(6.9)		(6.5)		(4.7)		(3.0)		(3.7)
Amortization of Net Actuarial Loss	11.1		0.9		1.7		1.4		1.2		0.6		0.8
Net Periodic Benefit Credit	$	(80.3)	$	(6.8)	$	(11.3)	$	(10.7)	$	(8.5)	$	(4.8)	$	(5.9)

Nine Months Ended September 30, 2022	AEP		AEP Texas		APCo		I&M		OPCo		PSO		SWEPCo
	(in millions)
Service Cost	$	5.5	$	0.3	$	0.6	$	0.7	$	0.5	$	0.4	$	0.4
Interest Cost	21.9		1.7		3.5		2.5		2.2		1.1		1.4
Expected Return on Plan Assets	(82.5)		(6.8)		(12.2)		(10.2)		(8.9)		(4.6)		(5.5)
Amortization of Prior Service Credit	(53.6)		(4.5)		(7.8)		(7.3)		(5.4)		(3.3)		(4.0)
Net Periodic Benefit Credit	$	(108.7)	$	(9.3)	$	(15.9)	$	(14.3)	$	(11.6)	$	(6.4)	$	(7.7)

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8.  BUSINESS SEGMENTS

The disclosures in this note apply to all Registrants unless indicated otherwise.

AEP’s Reportable Segments

AEP’s primary business is the generation, transmission and distribution of electricity.  Within its Vertically Integrated Utilities segment, AEP centrally dispatches generation assets and manages its overall utility operations on an integrated basis because of the substantial impact of cost-based rates and regulatory oversight.  Intersegment sales and transfers are generally based on underlying contractual arrangements and agreements.

AEP’s reportable segments and their related business activities are outlined below:

Vertically Integrated Utilities

•Generation, transmission and distribution of electricity for sale to retail and wholesale customers through assets owned and operated by AEGCo, APCo, I&M, KGPCo, KPCo, PSO, SWEPCo and WPCo.

Transmission and Distribution Utilities

•Transmission and distribution of electricity for sale to retail and wholesale customers through assets owned and operated by AEP Texas and OPCo.

•OPCo purchases energy and capacity to serve standard service offer customers and provides transmission and distribution services for all connected load.

AEP Transmission Holdco

•Development, construction and operation of transmission facilities through investments in AEPTCo. These investments have FERC-approved ROEs.

•Development, construction and operation of transmission facilities through investments in AEP’s transmission-only joint ventures. These investments have PUCT-approved or FERC-approved ROEs.

Generation & Marketing

•Contracted energy management services.

•Marketing, risk management and retail activities in ERCOT, MISO, PJM and SPP.

•Competitive generation in PJM.

The remainder of AEP’s activities are presented as Corporate and Other. While not considered a reportable segment, Corporate and Other primarily includes the purchasing of receivables from certain AEP utility subsidiaries, Parent’s guarantee revenue received from affiliates, investment income, interest income and interest expense, and other nonallocated costs.

146

The tables below represent AEP’s reportable segment income statement information for the three and nine months ended September 30, 2023 and 2022 and reportable segment balance sheet information as of September 30, 2023 and December 31, 2022.

	Three Months Ended September 30, 2023
	Vertically Integrated Utilities		Transmission and Distribution Utilities		AEP Transmission Holdco		Generation & Marketing		Corporate and Other (a)		Reconciling Adjustments		Consolidated
	(in millions)
Revenues from:
External Customers	$	3,158.1	$	1,535.2	$	94.0	$	527.5	$	26.9	$	—	$	5,341.7
Other Operating Segments	47.3		8.9		382.7		39.2		30.3		(508.4)		—
Total Revenues	$	3,205.4	$	1,544.1	$	476.7	$	566.7	$	57.2	$	(508.4)	$	5,341.7
Net Income (Loss)	$	514.0	$	206.0	$	203.9	$	132.8	$	(98.4)	$	—	$	958.3
	Three Months Ended September 30, 2022
	Vertically Integrated Utilities		Transmission and Distribution Utilities		AEP Transmission Holdco		Generation & Marketing		Corporate and Other (a)		Reconciling Adjustments		Consolidated
	(in millions)
Revenues from:
External Customers	$	3,174.6	$	1,525.5	$	81.9	$	733.1	$	11.0	$	—	$	5,526.1
Other Operating Segments	51.7		4.7		349.0		2.3		17.3		(425.0)		—
Total Revenues	$	3,226.3	$	1,530.2	$	430.9	$	735.4	$	28.3	$	(425.0)	$	5,526.1
Net Income (Loss)	$	476.9	$	165.5	$	171.4	$	96.2	$	(226.7)	$	—	$	683.3

	Nine Months Ended September 30, 2023
	Vertically Integrated Utilities		Transmission and Distribution Utilities		AEP Transmission Holdco		Generation & Marketing		Corporate and Other (a)		Reconciling Adjustments		Consolidated
	(in millions)
Revenues from:
External Customers	$	8,603.4	$	4,321.3	$	272.4	$	1,172.6	$	35.4	$	—	$	14,405.1
Other Operating Segments	134.3		27.2		1,118.4		52.5		83.9		(1,416.3)		—
Total Revenues	$	8,737.7	$	4,348.5	$	1,390.8	$	1,225.1	$	119.3	$	(1,416.3)	$	14,405.1
Net Income (Loss)	$	1,054.6	$	508.4	$	583.6	$	(62.2)	$	(209.6)	$	—	$	1,874.8
	Nine Months Ended September 30, 2022
	Vertically Integrated Utilities		Transmission and Distribution Utilities		AEP Transmission Holdco		Generation & Marketing		Corporate and Other (a)		Reconciling Adjustments		Consolidated
	(in millions)
Revenues from:
External Customers	$	8,416.4	$	4,064.5	$	244.4	$	1,997.0	$	36.1	$	—	$	14,758.4
Other Operating Segments	145.8		14.1		976.7		17.3		36.6		(1,190.5)		—
Total Revenues	$	8,562.2	$	4,078.6	$	1,221.1	$	2,014.3	$	72.7	$	(1,190.5)	$	14,758.4
Net Income (Loss)	$	1,079.4	$	483.1	$	487.8	$	278.1	$	(406.2)	$	—	$	1,922.2

147

	September 30, 2023
	Vertically Integrated Utilities		Transmission and Distribution Utilities		AEP Transmission Holdco		Generation & Marketing		Corporate and Other (a)			Reconciling Adjustments			Consolidated
	(in millions)
Total Assets	$	50,940.3	$	24,327.9	$	16,155.0	$	2,517.0	$	4,567.2	(b)	$	(3,381.8)	(c)	$	95,125.6

	December 31, 2022
	Vertically Integrated Utilities		Transmission and Distribution Utilities		AEP Transmission Holdco		Generation & Marketing		Corporate and Other (a)			Reconciling Adjustments			Consolidated
	(in millions)
Total Assets	$	49,761.8	$	22,920.2	$	15,215.8	$	4,520.1	$	6,768.4	(b)	$	(5,783.0)	(c)	$	93,403.3

(a)Corporate and Other primarily includes the purchasing of receivables from certain AEP utility subsidiaries. This segment also includes Parent’s guarantee revenue received from affiliates, investment income, interest income, interest expense and other nonallocated costs.

(b)Includes elimination of AEP Parent’s investments in wholly-owned subsidiary companies.

(c)Reconciling Adjustments for Total Assets primarily include elimination of intercompany advances to affiliates and intercompany accounts receivable.

Registrant Subsidiaries’ Reportable Segments (Applies to all Registrant Subsidiaries except AEPTCo)

The Registrant Subsidiaries each have one reportable segment, an integrated electricity generation, transmission and distribution business for APCo, I&M, PSO and SWEPCo, and an integrated electricity transmission and distribution business for AEP Texas and OPCo.  Other activities are insignificant.  The Registrant Subsidiaries’ operations are managed on an integrated basis because of the substantial impact of cost-based rates and regulatory oversight on the business process, cost structures and operating results.

AEPTCo’s Reportable Segments

AEPTCo Parent is the holding company of seven FERC-regulated transmission-only electric utilities. The seven State Transcos have been identified as operating segments of AEPTCo under the accounting guidance for “Segment Reporting.” The State Transcos business consists of developing, constructing and operating transmission facilities at the request of the RTOs in which they operate and in replacing and upgrading facilities, assets and components of the existing AEP transmission system as needed to maintain reliability standards and provide service to AEP’s wholesale and retail customers. The State Transcos are regulated for rate-making purposes exclusively by the FERC and earn revenues through tariff rates charged for the use of their electric transmission systems.

AEPTCo’s Chief Operating Decision Maker makes operating decisions, allocates resources to and assesses performance based on these operating segments. The State Transcos operating segments all have similar economic characteristics and meet all of the criteria under the accounting guidance for “Segment Reporting” to be aggregated into one operating segment. As a result, AEPTCo has one reportable segment. The remainder of AEPTCo’s activity is presented in AEPTCo Parent. While not considered a reportable segment, AEPTCo Parent represents the activity of the holding company which primarily relates to debt financing activity and general corporate activities.

The tables below present AEPTCo’s reportable segment income statement information for the three and nine months ended September 30, 2023 and 2022 and reportable segment balance sheet information as of September 30, 2023 and December 31, 2022.

148

	Three Months Ended September 30, 2023
	State Transcos		AEPTCo Parent			Reconciling Adjustments		AEPTCo Consolidated
	(in millions)
Revenues from:
External Customers	$	92.8	$	—		$	—	$	92.8
Sales to AEP Affiliates	369.9		—			—		369.9
Total Revenues	$	462.7	$	—		$	—	$	462.7
Net Income	$	178.2	$	1.0	(a)	$	—	$	179.2
	Three Months Ended September 30, 2022
	State Transcos		AEPTCo Parent			Reconciling Adjustments		AEPTCo Consolidated
	(in millions)
Revenues from:
External Customers	$	87.2	$	—		$	—	$	87.2
Sales to AEP Affiliates	331.3		—			—		331.3
Total Revenues	$	418.5	$	—		$	—	$	418.5
Net Income	$	152.6	$	0.1	(a)	$	—	$	152.7

	Nine Months Ended September 30, 2023
	State Transcos		AEPTCo Parent			Reconciling Adjustments		AEPTCo Consolidated
	(in millions)
Revenues from:
External Customers	$	269.2	$	—		$	—	$	269.2
Sales to AEP Affiliates	1,080.0		—			—		1,080.0
Total Revenues	$	1,349.2	$	—		$	—	$	1,349.2
Net Income	$	514.0	$	3.6	(a)	$	—	$	517.6
	Nine Months Ended September 30, 2022
	State Transcos		AEPTCo Parent			Reconciling Adjustments		AEPTCo Consolidated
	(in millions)
Revenues from:
External Customers	$	249.5	$	—		$	—	$	249.5
Sales to AEP Affiliates	933.8		—			—		933.8
Total Revenues	$	1,183.3	$	—		$	—	$	1,183.3
Net Income	$	426.4	$	0.2	(a)	$	—	$	426.6

	September 30, 2023
	State Transcos		AEPTCo Parent			Reconciling Adjustments			AEPTCo Consolidated
	(in millions)
Total Assets	$	14,760.8	$	5,561.2	(b)	$	(5,610.0)	(c)	$	14,712.0
	December 31, 2022
	State Transcos		AEPTCo Parent			Reconciling Adjustments			AEPTCo Consolidated
	(in millions)
Total Assets	$	13,875.6	$	4,817.4	(b)	$	(4,878.8)	(c)	$	13,814.2

(a)Includes the elimination of AEPTCo Parent’s equity earnings in the State Transcos.

(b)Primarily relates to Notes Receivable from the State Transcos.

(c)Primarily relates to the elimination of Notes Receivable from the State Transcos.

149

9.  DERIVATIVES AND HEDGING

The disclosures in this note apply to all Registrants unless indicated otherwise. For the periods presented, AEPTCo did not have any derivative and hedging activity.

OBJECTIVES FOR UTILIZATION OF DERIVATIVE INSTRUMENTS

AEPSC is agent for and transacts on behalf of certain AEP subsidiaries, including the Registrant Subsidiaries. AEPEP is agent for and transacts on behalf of other AEP subsidiaries.

The Registrants are exposed to certain market risks as major power producers and participants in the electricity, capacity, natural gas, coal and emission allowance markets.  These risks include commodity price risks which may be subject to capacity risk, interest rate risk and credit risk.  These risks represent the risk of loss that may impact the Registrants due to changes in the underlying market prices or rates.  Management utilizes derivative instruments to manage these risks.

STRATEGIES FOR UTILIZATION OF DERIVATIVE INSTRUMENTS TO ACHIEVE OBJECTIVES

Risk Management Strategies

The strategy surrounding the use of derivative instruments primarily focuses on managing risk exposures, future cash flows and creating value utilizing both economic and formal hedging strategies. The risk management strategies also include the use of derivative instruments for trading purposes which focus on seizing market opportunities to create value driven by expected changes in the market prices of the commodities. To accomplish these objectives, the Registrants primarily employ risk management contracts including physical and financial forward purchase-and-sale contracts and, to a lesser extent, OTC swaps and options. Not all risk management contracts meet the definition of a derivative under the accounting guidance for “Derivatives and Hedging.” Derivative risk management contracts elected normal under the normal purchases and normal sales scope exception are not subject to the requirements of this accounting guidance.

The Registrants utilize power, capacity, coal, natural gas, interest rate and, to a lesser extent, heating oil, gasoline and other commodity contracts to manage the risk associated with the energy business. The Registrants utilize interest rate derivative contracts in order to manage the interest rate exposure associated with the commodity portfolio. For disclosure purposes, such risks are grouped as “Commodity,” as these risks are related to energy risk management activities. The Registrants also utilize derivative contracts to manage interest rate risk associated with debt financing. For disclosure purposes, these risks are grouped as “Interest Rate.” The amount of risk taken is determined by the Commercial Operations, Energy Supply and Finance groups in accordance with established risk management policies as approved by the Finance Committee of the Board of Directors.

150

The following tables represent the gross notional volume of the Registrants’ outstanding derivative contracts:

Notional Volume of Derivative Instruments

September 30, 2023

Primary Risk Exposure	Unit of Measure	AEP		AEP Texas		APCo		I&M		OPCo		PSO		SWEPCo
		(in millions)
Commodity:
Power	MWhs	262.3		—		28.4		9.0		2.3		5.6		4.4
Natural Gas	MMBtus	149.8		—		27.3		—		—		25.3		13.1
Heating Oil and Gasoline	Gallons	8.3		2.2		1.3		0.8		1.7		1.1		1.2
Interest Rate	USD	$	80.1	$	—	$	—	$	—	$	—	$	—	$	—
Interest Rate on Long-term Debt	USD	$	950.0	$	—	$	—	$	—	$	—	$	—	$	—

December 31, 2022

Primary Risk Exposure	Unit of Measure	AEP		AEP Texas		APCo		I&M		OPCo		PSO		SWEPCo
		(in millions)
Commodity:
Power	MWhs	226.8		—		17.9		4.2		2.5		2.9		2.2
Natural Gas	MMBtus	77.1		—		1.9		—		—		1.9		2.1
Heating Oil and Gasoline	Gallons	6.9		1.9		1.0		0.7		1.4		0.9		1.0
Interest Rate	USD	$	99.9	$	—	$	—	$	—	$	—	$	—	$	—
Interest Rate on Long-term Debt	USD	$	1,650.0	$	—	$	—	$	—	$	—	$	200.0	$	—

Fair Value Hedging Strategies (Applies to AEP)

Parent enters into interest rate derivative transactions as part of an overall strategy to manage the mix of fixed-rate and floating-rate debt. Certain interest rate derivative transactions effectively modify exposure to interest rate risk by converting a portion of fixed-rate debt to a floating-rate. Provided specific criteria are met, these interest rate derivatives may be designated as fair value hedges.

Cash Flow Hedging Strategies

The Registrants utilize cash flow hedges on certain derivative transactions for the purchase and sale of power (“Commodity”) in order to manage the variable price risk related to forecasted purchases and sales. Management monitors the potential impacts of commodity price changes and, where appropriate, enters into derivative transactions to protect profit margins for a portion of future electricity sales and purchases. The Registrants do not hedge all commodity price risk.

The Registrants utilize a variety of interest rate derivative transactions in order to manage interest rate risk exposure. The Registrants also utilize interest rate derivative contracts to manage interest rate exposure related to future borrowings of fixed-rate debt. The Registrants do not hedge all interest rate exposure.

151

ACCOUNTING FOR DERIVATIVE INSTRUMENTS AND THE IMPACT ON THE FINANCIAL STATEMENTS

The accounting guidance for “Derivatives and Hedging” requires recognition of all qualifying derivative instruments as either assets or liabilities on the balance sheets at fair value. The fair values of derivative instruments accounted for using MTM accounting or hedge accounting are based on exchange prices and broker quotes. If a quoted market price is not available, the estimate of fair value is based on the best information available including valuation models that estimate future energy prices based on existing market and broker quotes and other assumptions. In order to determine the relevant fair values of the derivative instruments, the Registrants apply valuation adjustments for discounting, liquidity and credit quality.

Credit risk is the risk that a counterparty will fail to perform on the contract or fail to pay amounts due. Liquidity risk represents the risk that imperfections in the market will cause the price to vary from estimated fair value based upon prevailing market supply and demand conditions. Since energy markets are imperfect and volatile, there are inherent risks related to the underlying assumptions in models used to fair value risk management contracts. Unforeseen events may cause reasonable price curves to differ from actual price curves throughout a contract’s term and at the time a contract settles. Consequently, there could be significant adverse or favorable effects on future net income and cash flows if market prices are not consistent with management’s estimates of current market consensus for forward prices in the current period. This is particularly true for longer term contracts. Cash flows may vary based on market conditions, margin requirements and the timing of settlement of risk management contracts.

According to the accounting guidance for “Derivatives and Hedging,” the Registrants reflect the fair values of derivative instruments subject to netting agreements with the same counterparty net of related cash collateral. For certain risk management contracts, the Registrants are required to post or receive cash collateral based on third-party contractual agreements and risk profiles. AEP netted cash collateral received from third-parties against short-term and long-term risk management assets in the amounts of $93 million and $481 million as of September 30, 2023 and December 31, 2022, respectively. There was no cash collateral received from third-parties netted against short-term and long-term risk management assets for the Registrant Subsidiaries as of September 30, 2023 and December 31, 2022. The amount of cash collateral paid to third-parties netted against short-term and long-term risk management liabilities was immaterial for the Registrants as of September 30, 2023 and December 31, 2022.

152

The following tables represent the gross fair value of the Registrants’ derivative activity on the balance sheets. Unless shown as a separate line on the balance sheets due to materiality, Current Risk Management Assets are included in Prepayments and Other Current Assets, Long-term Risk Management Assets are included in Deferred Charges and Other Noncurrent Assets, Current Risk Management Liabilities are included in Other Current Liabilities and Long-term Risk Management Liabilities are included in Deferred Credits and Other Noncurrent Liabilities on the balance sheets.

AEP

	September 30, 2023
	Risk Management Contracts		Hedging Contracts				Gross Amounts of Risk Management Assets/ Liabilities Recognized		Gross Amounts Offset in the Statement of Financial Position (b)		Net Amounts of Assets/Liabilities Presented in the Statement of Financial Position (c)
Balance Sheet Location	Commodity (a)		Commodity (a)		Interest Rate (a)
	(in millions)
Current Risk Management Assets	$	595.7	$	55.6	$	—	$	651.3	$	(388.6)	$	262.7
Long-term Risk Management Assets	465.3		83.3		—		548.6		(258.4)		290.2
Total Assets	1,061.0		138.9		—		1,199.9		(647.0)		552.9
Current Risk Management Liabilities	460.3		9.9		43.2		513.4		(361.9)		151.5
Long-term Risk Management Liabilities	374.8		1.2		94.9		470.9		(192.5)		278.4
Total Liabilities	835.1		11.1		138.1		984.3		(554.4)		429.9
Total MTM Derivative Contract Net Assets (Liabilities)	$	225.9	$	127.8	$	(138.1)	$	215.6	$	(92.6)	$	123.0

	December 31, 2022
	Risk Management Contracts		Hedging Contracts				Gross Amounts of Risk Management Assets/ Liabilities Recognized		Gross Amounts Offset in the Statement of Financial Position (b)		Net Amounts of Assets/Liabilities Presented in the Statement of Financial Position (c)
Balance Sheet Location	Commodity (a)		Commodity (a)		Interest Rate (a)
	(in millions)
Current Risk Management Assets	$	965.4	$	212.2	$	1.8	$	1,179.4	$	(830.6)	$	348.8
Long-term Risk Management Assets	565.6		148.9		14.3		728.8		(444.7)		284.1
Total Assets	1,531.0		361.1		16.1		1,908.2		(1,275.3)		632.9
Current Risk Management Liabilities	663.8		60.4		41.4		765.6		(620.4)		145.2
Long-term Risk Management Liabilities	412.0		17.4		91.1		520.5		(175.3)		345.2
Total Liabilities	1,075.8		77.8		132.5		1,286.1		(795.7)		490.4
Total MTM Derivative Contract Net Assets (Liabilities)	$	455.2	$	283.3	$	(116.4)	$	622.1	$	(479.6)	$	142.5

153

AEP Texas

	September 30, 2023
	Risk Management		Gross Amounts Offset		Net Amounts of Assets/Liabilities
	Contracts –		in the Statement of		Presented in the Statement of
Balance Sheet Location	Commodity (a)		Financial Position (b)		Financial Position (c)
	(in millions)
Current Risk Management Assets	$	0.4	$	—	$	0.4
Long-term Risk Management Assets	—		—		—
Total Assets	0.4		—		0.4
Current Risk Management Liabilities	—		—		—
Long-term Risk Management Liabilities	—		—		—
Total Liabilities	—		—		—
Total MTM Derivative Contract Net Assets	$	0.4	$	—	$	0.4

	December 31, 2022
	Risk Management		Gross Amounts Offset		Net Amounts of Assets/Liabilities
	Contracts –		in the Statement of		Presented in the Statement of
Balance Sheet Location	Commodity (a)		Financial Position (b)		Financial Position (c)
	(in millions)
Current Risk Management Assets	$	—	$	—	$	—
Long-term Risk Management Assets	—		—		—
Total Assets	—		—		—
Current Risk Management Liabilities	—		—		—
Long-term Risk Management Liabilities	—		—		—
Total Liabilities	—		—		—
Total MTM Derivative Contract Net Assets	$	—	$	—	$	—

154

APCo

	September 30, 2023
	Risk Management		Gross Amounts Offset		Net Amounts of Assets/Liabilities
	Contracts –		in the Statement of		Presented in the Statement of
Balance Sheet Location	Commodity (a)		Financial Position (b)		Financial Position (c)
	(in millions)
Current Risk Management Assets	$	48.8	$	(2.4)	$	46.4
Long-term Risk Management Assets	0.8		(0.6)		0.2
Total Assets	49.6		(3.0)		46.6
Current Risk Management Liabilities	4.2		(2.4)		1.8
Long-term Risk Management Liabilities	1.5		(0.6)		0.9
Total Liabilities	5.7		(3.0)		2.7
Total MTM Derivative Contract Net Assets	$	43.9	$	—	$	43.9

	December 31, 2022
	Risk Management		Gross Amounts Offset		Net Amounts of Assets/Liabilities
	Contracts –		in the Statement of		Presented in the Statement of
Balance Sheet Location	Commodity (a)		Financial Position (b)		Financial Position (c)
	(in millions)
Current Risk Management Assets	$	69.3	$	(0.2)	$	69.1
Long-term Risk Management Assets	0.7		(0.7)		—
Total Assets	70.0		(0.9)		69.1
Current Risk Management Liabilities	4.1		(0.5)		3.6
Long-term Risk Management Liabilities	0.7		(0.6)		0.1
Total Liabilities	4.8		(1.1)		3.7
Total MTM Derivative Contract Net Assets	$	65.2	$	0.2	$	65.4

155

I&M

	September 30, 2023
	Risk Management		Gross Amounts Offset		Net Amounts of Assets/Liabilities
	Contracts –		in the Statement of		Presented in the Statement of
Balance Sheet Location	Commodity (a)		Financial Position (b)		Financial Position (c)
	(in millions)
Current Risk Management Assets	$	20.2	$	(4.4)	$	15.8
Long-term Risk Management Assets	6.6		(1.2)		5.4
Total Assets	26.8		(5.6)		21.2
Current Risk Management Liabilities	5.3		(4.2)		1.1
Long-term Risk Management Liabilities	1.0		(1.0)		—
Total Liabilities	6.3		(5.2)		1.1
Total MTM Derivative Contract Net Assets (Liabilities)	$	20.5	$	(0.4)	$	20.1

	December 31, 2022
	Risk Management		Gross Amounts Offset		Net Amounts of Assets/Liabilities
	Contracts –		in the Statement of		Presented in the Statement of
Balance Sheet Location	Commodity (a)		Financial Position (b)		Financial Position (c)
	(in millions)
Current Risk Management Assets	$	16.0	$	(0.8)	$	15.2
Long-term Risk Management Assets	0.5		(0.3)		0.2
Total Assets	16.5		(1.1)		15.4
Current Risk Management Liabilities	0.9		(0.9)		—
Long-term Risk Management Liabilities	0.3		(0.3)		—
Total Liabilities	1.2		(1.2)		—
Total MTM Derivative Contract Net Assets	$	15.3	$	0.1	$	15.4

156

OPCo

	September 30, 2023
	Risk Management		Gross Amounts Offset		Net Amounts of Assets/Liabilities
	Contracts –		in the Statement of		Presented in the Statement of
Balance Sheet Location	Commodity (a)		Financial Position (b)		Financial Position (c)
	(in millions)
Current Risk Management Assets	$	0.3	$	—	$	0.3
Long-term Risk Management Assets	—		—		—
Total Assets	0.3		—		0.3
Current Risk Management Liabilities	5.7		—		5.7
Long-term Risk Management Liabilities	45.9		—		45.9
Total Liabilities	51.6		—		51.6
Total MTM Derivative Contract Net Liabilities	$	(51.3)	$	—	$	(51.3)

	December 31, 2022
	Risk Management		Gross Amounts Offset		Net Amounts of Assets/Liabilities
	Contracts –		in the Statement of		Presented in the Statement of
Balance Sheet Location	Commodity (a)		Financial Position (b)		Financial Position (c)
	(in millions)
Current Risk Management Assets	$	—	$	—	$	—
Long-term Risk Management Assets	—		—		—
Total Assets	—		—		—
Current Risk Management Liabilities	2.1		(0.3)		1.8
Long-term Risk Management Liabilities	37.9		—		37.9
Total Liabilities	40.0		(0.3)		39.7
Total MTM Derivative Contract Net Assets (Liabilities)	$	(40.0)	$	0.3	$	(39.7)

157

PSO

	September 30, 2023
	Risk Management		Gross Amounts Offset		Net Amounts of Assets/Liabilities
	Contracts –		in the Statement of		Presented in the Statement of
Balance Sheet Location	Commodity (a)		Financial Position (b)		Financial Position (c)
	(in millions)
Current Risk Management Assets	$	28.3	$	(0.1)	$	28.2
Long-term Risk Management Assets	0.3		(0.3)		—
Total Assets	28.6		(0.4)		28.2
Current Risk Management Liabilities	7.2		(0.1)		7.1
Long-term Risk Management Liabilities	0.4		(0.3)		0.1
Total Liabilities	7.6		(0.4)		7.2
Total MTM Derivative Contract Net Assets	$	21.0	$	—	$	21.0

	December 31, 2022
	Risk Management Contracts –		Hedging Contracts		Gross Amounts of Risk Management Assets/Liabilities Recognized		Gross Amounts Offset in the Statement of Financial Position (b)		Net Amounts of Assets/Liabilities Presented in the Statement of Financial Position (c)
Balance Sheet Location	Commodity (a)		Interest Rate (a)
	(in millions)
Current Risk Management Assets	$	24.1	$	1.6	$	25.7	$	(0.4)	$	25.3
Long-term Risk Management Assets	—		—		—		—		—
Total Assets	24.1		1.6		25.7		(0.4)		25.3
Current Risk Management Liabilities	2.1		—		2.1		(0.5)		1.6
Long-term Risk Management Liabilities	—		—		—		—		—
Total Liabilities	2.1		—		2.1		(0.5)		1.6
Total MTM Derivative Contract Net Assets	$	22.0	$	1.6	$	23.6	$	0.1	$	23.7

158

SWEPCo

	September 30, 2023
	Risk Management		Gross Amounts Offset		Net Amounts of Assets/Liabilities
	Contracts –		in the Statement of		Presented in the Statement of
Balance Sheet Location	Commodity (a)		Financial Position (b)		Financial Position (c)
	(in millions)
Current Risk Management Assets	$	17.6	$	(0.5)	$	17.1
Long-term Risk Management Assets	—		—		—
Total Assets	17.6		(0.5)		17.1
Current Risk Management Liabilities	3.6		(0.5)		3.1
Long-term Risk Management Liabilities	0.4		—		0.4
Total Liabilities	4.0		(0.5)		3.5
Total MTM Derivative Contract Net Assets	$	13.6	$	—	$	13.6

	December 31, 2022
	Risk Management		Gross Amounts Offset		Net Amounts of Assets/Liabilities
	Contracts –		in the Statement of		Presented in the Statement of
Balance Sheet Location	Commodity (a)		Financial Position (b)		Financial Position (c)
	(in millions)
Current Risk Management Assets	$	16.8	$	(0.4)	$	16.4
Long-term Risk Management Assets	—		—		—
Total Assets	16.8		(0.4)		16.4
Current Risk Management Liabilities	2.0		(0.6)		1.4
Long-term Risk Management Liabilities	—		—		—
Total Liabilities	2.0		(0.6)		1.4
Total MTM Derivative Contract Net Assets	$	14.8	$	0.2	$	15.0

(a)Derivative instruments within these categories are disclosed as gross.  These instruments are subject to master netting agreements and are presented on the balance sheets on a net basis in accordance with the accounting guidance for “Derivatives and Hedging.”

(b)Amounts include counterparty netting of risk management and hedging contracts and associated cash collateral in accordance with the accounting guidance for “Derivatives and Hedging.”

(c)All derivative contracts subject to a master netting arrangement or similar agreement are offset in the statement of financial position.

159

The tables below present the Registrants’ amount of gain (loss) recognized on risk management contracts:

Amount of Gain (Loss) Recognized on Risk Management Contracts

	Three Months Ended September 30, 2023
Location of Gain (Loss)	AEP		AEP Texas		APCo		I&M		OPCo		PSO		SWEPCo
	(in millions)
Vertically Integrated Utilities Revenues	$	(9.5)	$	—	$	—	$	—	$	—	$	—	$	—
Generation & Marketing Revenues	(1.4)		—		—		—		—		—		—
Electric Generation, Transmission and Distribution Revenues	—		—		0.1		(9.6)		—		—		—
Purchased Electricity, Fuel and Other Consumables Used for Electric Generation	0.2		—		0.2		—		—		—		—
Maintenance	(0.4)		(0.1)		(0.1)		—		(0.1)		(0.1)		(0.1)
Regulatory Assets (a)	1.2		0.5		1.2		1.7		0.5		(3.5)		(1.1)
Regulatory Liabilities (a)	43.0		0.4		11.9		1.6		—		12.9		12.7
Total Gain (Loss) on Risk Management Contracts	$	33.1	$	0.8	$	13.3	$	(6.3)	$	0.4	$	9.3	$	11.5

	Three Months Ended September 30, 2022
Location of Gain (Loss)	AEP		AEP Texas			APCo		I&M		OPCo		PSO		SWEPCo
	(in millions)
Vertically Integrated Utilities Revenues	$	2.1	$	—		$	—	$	—	$	—	$	—	$	—
Generation & Marketing Revenues	116.7		—			—		—		—		—		—
Electric Generation, Transmission and Distribution Revenues	—		—			0.3		—		—		—		—
Other Revenues - Nonaffiliated	—		—		`	—		1.9		—		—		—
Purchased Electricity, Fuel and Other Consumables Used for Electric Generation	0.9		—			0.9		0.1		—		—		—
Other Operation	1.4		0.4			0.1		0.1		0.2		0.2		0.2
Maintenance	2.0		0.5			0.2		0.2		0.4		0.2		0.3
Regulatory Assets (a)	4.3		—			—		0.1		4.1		—		0.1
Regulatory Liabilities (a)	103.2		(1.5)			59.7		3.8		0.9		19.7		7.0
Total Gain (Loss) on Risk Management Contracts	$	230.6	$	(0.6)		$	61.2	$	6.2	$	5.6	$	20.1	$	7.6

160

	Nine Months Ended September 30, 2023
Location of Gain (Loss)	AEP		AEP Texas		APCo		I&M		OPCo		PSO		SWEPCo
	(in millions)
Vertically Integrated Utilities Revenues	$	2.2	$	—	$	—	$	—	$	—	$	—	$	—
Generation & Marketing Revenues	(290.6)		—		—		—		—		—		—
Electric Generation, Transmission and Distribution Revenues	—		—		0.1		2.1		—		—		—
Purchased Electricity, Fuel and Other Consumables Used for Electric Generation	2.2		—		2.1		0.1		—		—		—
Other Operation	(0.1)		—		—		—		—		—		—
Maintenance	(0.6)		(0.2)		(0.1)		—		(0.1)		(0.1)		(0.1)
Regulatory Assets (a)	(36.0)		—		—		(0.4)		(24.6)		(7.0)		(3.5)
Regulatory Liabilities (a)	143.5		0.4		3.1		6.4		—		73.3		58.2
Total Gain (Loss) on Risk Management Contracts	$	(179.4)	$	0.2	$	5.2	$	8.2	$	(24.7)	$	66.2	$	54.6

	Nine Months Ended September 30, 2022
Location of Gain (Loss)	AEP		AEP Texas		APCo		I&M		OPCo		PSO		SWEPCo
	(in millions)
Vertically Integrated Utilities Revenues	$	2.2	$	—	$	—	$	—	$	—	$	—	$	—
Generation & Marketing Revenues	390.0		—		—		—		—		—		—
Electric Generation, Transmission and Distribution Revenues	—		—		0.4		(0.1)		—		—		—
Other Revenues - Nonaffiliated	—		—		—		1.9		—		—		—
Purchased Electricity, Fuel and Other Consumables Used for Electric Generation	3.3		—		3.0		0.1		—		0.1		—
Other Operation	3.7		1.1		0.3		0.4		0.6		0.5		0.6
Maintenance	5.2		1.4		0.7		0.5		0.9		0.6		0.8
Regulatory Assets (a)	49.3		0.1		—		(1.2)		49.0		3.6		(2.1)
Regulatory Liabilities (a)	250.1		(0.6)		79.9		7.0		2.5		71.4		64.8
Total Gain on Risk Management Contracts	$	703.8	$	2.0	$	84.3	$	8.6	$	53.0	$	76.2	$	64.1

(a)Represents realized and unrealized gains and losses subject to regulatory accounting treatment recorded as either current or noncurrent on the balance sheets.

Certain qualifying derivative instruments have been designated as normal purchase or normal sale contracts, as provided in the accounting guidance for “Derivatives and Hedging.” Derivative contracts that have been designated as normal purchases or normal sales under that accounting guidance are not subject to MTM accounting treatment and are recognized on the statements of income on an accrual basis.

The accounting for the changes in the fair value of a derivative instrument depends on whether it qualifies for and has been designated as part of a hedging relationship and further, on the type of hedging relationship. Depending on the exposure, management designates a hedging instrument as a fair value hedge or a cash flow hedge.

For contracts that have not been designated as part of a hedging relationship, the accounting for changes in fair value depends on whether the derivative instrument is held for trading purposes. Unrealized and realized gains and losses on derivative instruments held for trading purposes are included in revenues on a net basis on the statements of income. Unrealized and realized gains and losses on derivative instruments not held for trading purposes are included in revenues or expenses on the statements of income depending on the relevant facts and circumstances. Certain derivatives that economically hedge future commodity risk are recorded in the same line item on the statements of income as that of the associated risk being hedged. However, unrealized and some realized gains and losses in regulated jurisdictions for both trading and non-trading derivative instruments are recorded as regulatory assets (for losses) or regulatory liabilities (for gains) in accordance with the accounting guidance for “Regulated Operations.”

161

Accounting for Fair Value Hedging Strategies (Applies to AEP)

For fair value hedges (i.e. hedging the exposure to changes in the fair value of an asset, liability or an identified portion thereof attributable to a particular risk), the gain or loss on the derivative instrument as well as the offsetting gain or loss on the hedged item associated with the hedged risk impacts net income during the period of change.

AEP records realized and unrealized gains or losses on interest rate swaps that are designated and qualify for fair value hedge accounting treatment and any offsetting changes in the fair value of the debt being hedged in Interest Expense on the statements of income.

The following table shows the impacts recognized on the balance sheets related to the hedged items in fair value hedging relationships:

	Carrying Amount of the Hedged Liabilities				Cumulative Amount of Fair Value Hedging Adjustment Included in the Carrying Amount of the Hedged Liabilities
	September 30, 2023		December 31, 2022		September 30, 2023		December 31, 2022
	(in millions)
Long-term Debt (a) (b)	$	(840.1)	$	(855.5)	$	106.1	$	89.7

(a)Amounts included on the Balance Sheet within Noncurrent Liabilities line item Long-term Debt.

(b)Amounts include $(32) million and $(38) million as of September 30, 2023 and December 31, 2022, respectively, for the fair value hedge adjustment of hedged debt obligations for which hedge accounting has been discontinued.

The pretax effects of fair value hedge accounting on income were as follows:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2023		2022		2023		2022
	(in millions)
Gain (Loss) on Interest Rate Contracts:
Fair Value Hedging Instruments (a)	$	(13.4)	$	(36.0)	$	(10.7)	$	(98.4)
Fair Value Portion of Long-term Debt (a)	13.4		36.0		10.7		98.4

(a)Gain (Loss) is included in Interest Expense on the statements of income.

Accounting for Cash Flow Hedging Strategies (Applies to AEP, AEP Texas, APCo, I&M, PSO and SWEPCo)

For cash flow hedges (i.e. hedging the exposure to variability in expected future cash flows that is attributable to a particular risk), the Registrants initially report the gain or loss on the derivative instrument as a component of Accumulated Other Comprehensive Income (Loss) on the balance sheets until the period the hedged item affects net income.

Realized gains and losses on derivative contracts for the purchase and sale of power designated as cash flow hedges are included in Total Revenues or Purchased Electricity, Fuel and Other Consumables Used for Electric Generation on the statements of income or in Regulatory Assets or Regulatory Liabilities on the balance sheets, depending on the specific nature of the risk being hedged. During the three and nine months ended September 30, 2023 and 2022, AEP applied cash flow hedging to outstanding power derivatives and the Registrant Subsidiaries did not.

The Registrants reclassify gains and losses on interest rate derivative hedges related to debt financings from Accumulated Other Comprehensive Income (Loss) on the balance sheets into Interest Expense on the statements of income in those periods in which hedged interest payments occur. During the three months ended September 30, 2023, the Registrants did not apply cash flow hedging to outstanding interest rate derivatives. During the nine months ended September 30, 2023, AEP, AEP Texas, I&M, PSO and SWEPCo applied cash flow hedging to outstanding interest rate derivatives and the other Registrant Subsidiaries did not. During the three and nine months ended September 30, 2022, AEP applied cash flow hedging to outstanding interest rate derivatives and the Registrant Subsidiaries did not.

162

For details on effective cash flow hedges included in Accumulated Other Comprehensive Income (Loss) on the balance sheets and the reasons for changes in cash flow hedges, see Note 3 - Comprehensive Income.

Cash flow hedges included in Accumulated Other Comprehensive Income (Loss) on the balance sheets were:

Impact of Cash Flow Hedges on AEP’s Balance Sheets

	September 30, 2023				December 31, 2022
	Commodity		Interest Rate		Commodity		Interest Rate
	(in millions)
AOCI Gain Net of Tax	$	100.6	$	4.7	$	223.5	$	0.3
Portion Expected to be Reclassed to Net Income During the Next Twelve Months	36.1		4.3		119.9		0.3

As of September 30, 2023 the maximum length of time that AEP is hedging its exposure to variability in future cash flows related to forecasted transactions is 90 months.

Impact of Cash Flow Hedges on the Registrant Subsidiaries’ Balance Sheets

	September 30, 2023				December 31, 2022
	Interest Rate
			Expected to be				Expected to be
			Reclassified to				Reclassified to
			Net Income During				Net Income During
	AOCI Gain (Loss)		the Next		AOCI Gain (Loss)		the Next
Company	Net of Tax		Twelve Months		Net of Tax		Twelve Months
	(in millions)
AEP Texas	$	2.8	$	0.3	$	(0.3)	$	(0.2)
APCo	6.1		0.8		6.7		0.8
I&M	(5.6)		(0.4)		(5.1)		(0.6)
PSO	(0.2)		—		1.3		0.1
SWEPCo	1.4		0.3		1.1		0.2

The actual amounts reclassified from Accumulated Other Comprehensive Income (Loss) to Net Income can differ from the estimate above due to market price changes.

Credit Risk

Management mitigates credit risk in wholesale marketing and trading activities by assessing the creditworthiness of potential counterparties before entering into transactions with them and continuing to evaluate their creditworthiness on an ongoing basis. Management uses credit agency ratings and current market-based qualitative and quantitative data as well as financial statements to assess the financial health of counterparties on an ongoing basis.

Master agreements are typically used to facilitate the netting of cash flows associated with a single counterparty and may include collateral requirements. Collateral requirements in the form of cash, letters of credit and parental/affiliate guarantees may be obtained as security from counterparties in order to mitigate credit risk. Some master agreements include margining, which requires a counterparty to post cash or letters of credit in the event exposure exceeds the established threshold. The threshold represents an unsecured credit limit which may be supported by a parental/affiliate guaranty, as determined in accordance with AEP’s credit policy. In addition, master agreements allow for termination and liquidation of all positions in the event of a default including a failure or inability to post collateral when required.

163

Credit-Risk-Related Contingent Features

Credit Downgrade Triggers (Applies to AEP, APCo, I&M, PSO and SWEPCo)

A limited number of derivative contracts include collateral triggering events, which include a requirement to maintain certain credit ratings.  On an ongoing basis, AEP’s risk management organization assesses the appropriateness of these collateral triggering events in contracts.  The Registrants have not experienced a downgrade below a specified credit rating threshold that would require the posting of additional collateral.  AEP had derivative contracts with collateral triggering events in a net liability position with a total exposure of $0 and $2 million as of September 30, 2023 and December 31, 2022, respectively. The Registrant Subsidiaries had no derivative contracts with collateral triggering events in a net liability position as of September 30, 2023 and December 31, 2022.

Cross-Acceleration Triggers

Certain interest rate derivative contracts contain cross-acceleration provisions that, if triggered, would permit the counterparty to declare a default and require settlement of the outstanding payable. These cross-acceleration provisions could be triggered if there was a non-performance event by the Registrants under any of their outstanding debt of at least $50 million and the lender on that debt has accelerated the entire repayment obligation. On an ongoing basis, AEP’s risk management organization assesses the appropriateness of these cross-acceleration provisions in contracts. AEP had derivative contracts with cross-acceleration provisions in a net liability position of $138 million and $127 million as of September 30, 2023 and December 31, 2022, respectively. There was no cash collateral posted as of September 30, 2023 and December 31, 2022. If a cross-acceleration provision would have been triggered, settlement at fair value would have been required. The Registrant Subsidiaries had no derivative contracts with cross-acceleration provisions outstanding as of September 30, 2023 and December 31, 2022.

Cross-Default Triggers (Applies to AEP, APCo, I&M, PSO and SWEPCo)

In addition, a majority of non-exchange traded commodity contracts contain cross-default provisions that, if triggered, would permit the counterparty to declare a default and require settlement of the outstanding payable. These cross-default provisions could be triggered if there was a non-performance event by Parent or the obligor under outstanding debt or a third-party obligation that is $50 million or greater.  On an ongoing basis, AEP’s risk management organization assesses the appropriateness of these cross-default provisions in the contracts. AEP had derivative contracts subject to cross-default provisions in a net liability position of $165 million and $217 million as of September 30, 2023 and December 31, 2022, respectively, after considering contractual netting arrangements. There was no cash collateral posted as of September 30, 2023 and December 31, 2022. If a cross-default provision would have been triggered, settlement at fair value would have been required. The Registrant Subsidiaries’ derivative contracts with cross-default provisions outstanding as of September 30, 2023 and December 31, 2022 were not material.

164

10.  FAIR VALUE MEASUREMENTS

The disclosures in this note apply to all Registrants except AEPTCo unless indicated otherwise.

Fair Value Hierarchy and Valuation Techniques

The accounting guidance for “Fair Value Measurements and Disclosures” establishes a fair value hierarchy that prioritizes the inputs used to measure fair value.  The hierarchy gives the highest priority to unadjusted quoted prices in active markets for identical assets or liabilities (Level 1 measurement) and the lowest priority to unobservable inputs (Level 3 measurement).  Where observable inputs are available for substantially the full term of the asset or liability, the instrument is categorized in Level 2.  When quoted market prices are not available, pricing may be completed using comparable securities, dealer values, operating data and general market conditions to determine fair value.  Valuation models utilize various inputs such as commodity, interest rate and, to a lesser degree, volatility and credit that include quoted prices for similar assets or liabilities in active markets, quoted prices for identical or similar assets or liabilities in inactive markets, market corroborated inputs (i.e. inputs derived principally from, or correlated to, observable market data) and other observable inputs for the asset or liability.

For commercial activities, exchange-traded derivatives, namely futures contracts, are generally fair valued based on unadjusted quoted prices in active markets and are classified as Level 1.  Level 2 inputs primarily consist of OTC broker quotes in moderately active or less active markets, as well as exchange-traded derivatives where there is insufficient market liquidity to warrant inclusion in Level 1.  Management verifies price curves using these broker quotes and classifies these fair values within Level 2 when substantially all of the fair value can be corroborated.  Management typically obtains multiple broker quotes, which are nonbinding in nature but are based on recent trades in the marketplace.  When multiple broker quotes are obtained, the quoted bid and ask prices are averaged.  In certain circumstances, a broker quote may be discarded if it is a clear outlier.  Management uses a historical correlation analysis between the broker quoted location and the illiquid locations.  If the points are highly correlated, these locations are included within Level 2 as well.  Certain OTC and bilaterally executed derivative instruments are executed in less active markets with a lower availability of pricing information.  Illiquid transactions, complex structured transactions, FTRs and counterparty credit risk may require nonmarket-based inputs.  Some of these inputs may be internally developed or extrapolated and utilized to estimate fair value.  When such inputs have a significant impact on the measurement of fair value, the instrument is categorized as Level 3.  The main driver of contracts being classified as Level 3 is the inability to substantiate energy price curves in the market.  A portion of the Level 3 instruments have been economically hedged which limits potential earnings volatility.

AEP utilizes its trustee’s external pricing service to estimate the fair value of the underlying investments held in the nuclear trusts.  AEP’s investment managers review and validate the prices utilized by the trustee to determine fair value.  AEP’s management performs its own valuation testing to verify the fair values of the securities.  AEP receives audit reports of the trustee’s operating controls and valuation processes.

Assets in the nuclear trusts, cash and cash equivalents, other temporary investments restricted cash for securitized funding are classified using the following methods.  Equities are classified as Level 1 holdings if they are actively traded on exchanges.  Items classified as Level 1 are investments in money market funds, fixed income and equity mutual funds and equity securities.  They are valued based on observable inputs, primarily unadjusted quoted prices in active markets for identical assets.  Items classified as Level 2 are primarily investments in individual fixed income securities.  Fixed income securities generally do not trade on exchanges and do not have an official closing price but their valuation inputs are based on observable market data.  Pricing vendors calculate bond valuations using financial models and matrices.  The models use observable inputs including yields on benchmark securities, quotes by securities brokers, rating agency actions, discounts or premiums on securities compared to par prices, changes in yields for U.S. Treasury securities, corporate actions by bond issuers, prepayment schedules and histories, economic events and, for certain securities, adjustments to yields to reflect changes in the rate of inflation.  Other securities with model-derived valuation inputs that are observable are also classified as Level 2 investments.  Investments with unobservable valuation inputs are classified as Level 3 investments.

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Fair Value Measurements of Long-term Debt (Applies to all Registrants)

The fair values of Long-term Debt are based on quoted market prices, without credit enhancements, for the same or similar issues and the current interest rates offered for instruments with similar maturities classified as Level 2 measurement inputs.  These instruments are not marked-to-market.  The estimates presented are not necessarily indicative of the amounts that could be realized in a current market exchange. The fair value of AEP’s Equity Units (Level 1) are valued based on publicly traded securities issued by AEP.

The book values and fair values of Long-term Debt are summarized in the following table:

	September 30, 2023				December 31, 2022
Company	Book Value		Fair Value		Book Value		Fair Value
	(in millions)
AEP (a)	$	39,489.1	$	33,559.8	$	36,801.0	$	32,915.9
AEP Texas	5,926.7		4,963.8		5,657.8		5,045.8
AEPTCo	5,473.7		4,270.8		4,782.8		3,940.5
APCo	5,587.3		4,901.4		5,410.5		5,079.2
I&M	3,443.6		2,920.6		3,260.8		2,929.0
OPCo	3,366.2		2,645.2		2,970.3		2,516.6
PSO	2,384.2		1,942.5		1,912.8		1,635.8
SWEPCo	3,646.2		2,944.8		3,391.6		2,870.9

(a)The fair value amounts include debt related to AEP’s Equity Units and had a fair value of $0 and $877 million as of September 30, 2023 and December 31, 2022, respectively. See “Equity Units” section of Note 12 for additional information.

Fair Value Measurements of Other Temporary Investments and Restricted Cash (Applies to AEP)

Other Temporary Investments include marketable securities that management intends to hold for less than one year and investments by AEP’s protected cell of EIS.

The following is a summary of Other Temporary Investments and Restricted Cash:

	September 30, 2023
			Gross		Gross
			Unrealized		Unrealized		Fair
Other Temporary Investments and Restricted Cash	Cost		Gains		Losses		Value
	(in millions)
Restricted Cash (a)	$	53.8	$	—	$	—	$	53.8
Other Cash Deposits	13.4		—		—		13.4
Fixed Income Securities – Mutual Funds (b)	170.4		—		(10.4)		160.0
Equity Securities – Mutual Funds	15.0		22.6		—		37.6
Total Other Temporary Investments and Restricted Cash	$	252.6	$	22.6	$	(10.4)	$	264.8

166

	December 31, 2022
			Gross		Gross
			Unrealized		Unrealized		Fair
Other Temporary Investments and Restricted Cash	Cost		Gains		Losses		Value
	(in millions)
Restricted Cash (a)	$	47.1	$	—	$	—	$	47.1
Other Cash Deposits	9.0		—		—		9.0
Fixed Income Securities – Mutual Funds (b)	152.4		—		(8.3)		144.1
Equity Securities – Mutual Funds	15.1		19.4		—		34.5
Total Other Temporary Investments and Restricted Cash	$	223.6	$	19.4	$	(8.3)	$	234.7

(a)Primarily represents amounts held for the repayment of debt.

(b)Primarily short and intermediate maturities which may be sold and do not contain maturity dates.

The following table provides the activity for fixed income and equity securities within Other Temporary Investments:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2023		2022		2023		2022
	(in millions)
Proceeds from Investment Sales	$	0.8	$	—	$	0.8	$	15.0
Purchases of Investments	14.6		11.8		16.9		13.4
Gross Realized Gains on Investment Sales	0.3		—		0.3		3.6
Gross Realized Losses on Investment Sales	—		—		—		0.5

Fair Value Measurements of Trust Assets for Decommissioning and SNF Disposal (Applies to AEP and I&M)

Nuclear decommissioning and SNF trust funds represent funds that regulatory commissions allow I&M to collect through rates to fund future decommissioning and SNF disposal liabilities.  By rules or orders, the IURC, the MPSC and the FERC established investment limitations and general risk management guidelines.  In general, limitations include:

•Acceptable investments (rated investment grade or above when purchased).

•Maximum percentage invested in a specific type of investment.

•Prohibition of investment in obligations of AEP, I&M or their affiliates.

•Withdrawals permitted only for payment of decommissioning costs and trust expenses.

I&M maintains trust funds for each regulatory jurisdiction.  Regulatory approval is required to withdraw decommissioning funds.  These funds are managed by an external investment manager that must comply with the guidelines and rules of the applicable regulatory authorities. The trust assets are invested to optimize the net of tax earnings of the trust giving consideration to liquidity, risk, diversification and other prudent investment objectives.

I&M records securities held in these trust funds in Spent Nuclear Fuel and Decommissioning Trusts on its balance sheets.  I&M records these securities at fair value.  I&M classifies debt securities in the trust funds as available-for-sale due to their long-term purpose.

Other-than-temporary impairments for investments in debt securities are considered realized losses as a result of securities being managed by an external investment management firm.  The external investment management firm makes specific investment decisions regarding the debt and equity investments held in these trusts and generally intends to sell debt securities in an unrealized loss position as part of a tax optimization strategy.  Impairments

167

reduce the cost basis of the securities which will affect any future unrealized gain or realized gain or loss due to the adjusted cost of investment.  I&M records unrealized gains, unrealized losses and other-than-temporary impairments from securities in these trust funds as adjustments to the regulatory liability account for the nuclear decommissioning trust funds and to regulatory assets or liabilities for the SNF disposal trust funds in accordance with their treatment in rates.  Consequently, changes in fair value of trust assets do not affect earnings or AOCI.

The following is a summary of nuclear trust fund investments:

	September 30, 2023								December 31, 2022
			Gross		Gross		Other-Than-				Gross		Gross		Other-Than-
	Fair		Unrealized		Unrealized		Temporary		Fair		Unrealized		Unrealized		Temporary
	Value		Gains		Losses		Impairments		Value		Gains		Losses		Impairments
	(in millions)
Cash and Cash Equivalents	$	20.5	$	—	$	—	$	—	$	21.2	$	—	$	—	$	—
Fixed Income Securities:
United States Government	1,204.7		0.6		(30.8)		(38.5)		1,123.8		11.8		(14.9)		(18.8)
Corporate Debt	136.8		0.4		(12.4)		(5.3)		61.6		0.7		(7.7)		(9.6)
State and Local Government	3.2		—		—		—		3.3		0.1		—		(0.1)
Subtotal Fixed Income Securities	1,344.7		1.0		(43.2)		(43.8)		1,188.7		12.6		(22.6)		(28.5)
Equity Securities - Domestic	2,174.5		1,620.5		(1.9)		—		2,131.3		1,483.7		(6.4)		—
Spent Nuclear Fuel and Decommissioning Trusts	$	3,539.7	$	1,621.5	$	(45.1)	$	(43.8)	$	3,341.2	$	1,496.3	$	(29.0)	$	(28.5)

The following table provides the securities activity within the decommissioning and SNF trusts:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2023		2022		2023		2022
	(in millions)
Proceeds from Investment Sales	$	933.0	$	588.5	$	2,139.3	$	1,818.4
Purchases of Investments	949.5		601.6		2,182.8		1,854.8
Gross Realized Gains on Investment Sales	36.8		24.6		91.6		41.3
Gross Realized Losses on Investment Sales	7.7		8.4		20.0		33.5

The base cost of fixed income securities was $1.4 billion and $1.2 billion as of September 30, 2023 and December 31, 2022, respectively.  The base cost of equity securities was $556 million and $654 million as of September 30, 2023 and December 31, 2022, respectively.

The fair value of fixed income securities held in the nuclear trust funds, summarized by contractual maturities, as of September 30, 2023 was as follows:

	Fair Value of Fixed
	Income Securities
	(in millions)
Within 1 year	$	393.6
After 1 year through 5 years	504.4
After 5 years through 10 years	188.6
After 10 years	258.1
Total	$	1,344.7

168

Fair Value Measurements of Financial Assets and Liabilities

The following tables set forth, by level within the fair value hierarchy, the Registrants’ financial assets and liabilities that were accounted for at fair value on a recurring basis.  As required by the accounting guidance for “Fair Value Measurements and Disclosures,” financial assets and liabilities are classified in their entirety based on the lowest level of input that is significant to the fair value measurement.  Management’s assessment of the significance of a particular input to the fair value measurement requires judgment and may affect the valuation of fair value assets and liabilities and their placement within the fair value hierarchy levels.  There have not been any significant changes in management’s valuation techniques.

AEP

Assets and Liabilities Measured at Fair Value on a Recurring Basis

September 30, 2023

	Level 1		Level 2		Level 3		Other		Total
Assets:	(in millions)
Other Temporary Investments and Restricted Cash
Restricted Cash	$	53.8	$	—	$	—	$	—	$	53.8
Other Cash Deposits (a)	—		—		—		13.4		13.4
Fixed Income Securities – Mutual Funds	160.0		—		—		—		160.0
Equity Securities – Mutual Funds (b)	37.6		—		—		—		37.6
Total Other Temporary Investments and Restricted Cash	251.4		—		—		13.4		264.8
Risk Management Assets
Risk Management Commodity Contracts (c) (d)	11.4		721.3		319.2		(627.4)		424.5
Cash Flow Hedges:
Commodity Hedges (c)	—		119.3		19.3		(10.2)		128.4
Total Risk Management Assets	11.4		840.6		338.5		(637.6)		552.9
Spent Nuclear Fuel and Decommissioning Trusts
Cash and Cash Equivalents (e)	10.0		—		—		10.5		20.5
Fixed Income Securities:
United States Government	—		1,204.7		—		—		1,204.7
Corporate Debt	—		136.8		—		—		136.8
State and Local Government	—		3.2		—		—		3.2
Subtotal Fixed Income Securities	—		1,344.7		—		—		1,344.7
Equity Securities – Domestic (b)	2,174.5		—		—		—		2,174.5
Total Spent Nuclear Fuel and Decommissioning Trusts	2,184.5		1,344.7		—		10.5		3,539.7
Total Assets	$	2,447.3	$	2,185.3	$	338.5	$	(613.7)	$	4,357.4
Liabilities:
Risk Management Liabilities
Risk Management Commodity Contracts (c) (d)	$	24.8	$	646.3	$	155.0	$	(534.9)	$	291.2
Cash Flow Hedges:
Commodity Hedges (c)	—		10.1		0.7		(10.2)		0.6
Fair Value Hedges	—		138.1		—		—		138.1
Total Risk Management Liabilities	$	24.8	$	794.5	$	155.7	$	(545.1)	$	429.9

169

AEP

Assets and Liabilities Measured at Fair Value on a Recurring Basis

December 31, 2022

	Level 1		Level 2		Level 3		Other		Total
Assets:	(in millions)
Other Temporary Investments and Restricted Cash
Restricted Cash	$	47.1	$	—	$	—	$	—	$	47.1
Other Cash Deposits (a)	—		—		—		9.0		9.0
Fixed Income Securities – Mutual Funds	144.1		—		—		—		144.1
Equity Securities – Mutual Funds (b)	34.5		—		—		—		34.5
Total Other Temporary Investments and Restricted Cash	225.7		—		—		9.0		234.7
Risk Management Assets
Risk Management Commodity Contracts (c) (f)	15.0		1,197.5		314.4		(1,211.5)		315.4
Cash Flow Hedges:
Commodity Hedges (c)	—		332.6		26.7		(52.8)		306.5
Interest Rate Hedges	—		11.0		—		—		11.0
Total Risk Management Assets	15.0		1,541.1		341.1		(1,264.3)		632.9
Spent Nuclear Fuel and Decommissioning Trusts
Cash and Cash Equivalents (e)	11.3		—		—		9.9		21.2
Fixed Income Securities:
United States Government	—		1,123.8		—		—		1,123.8
Corporate Debt	—		61.6		—		—		61.6
State and Local Government	—		3.3		—		—		3.3
Subtotal Fixed Income Securities	—		1,188.7		—		—		1,188.7
Equity Securities – Domestic (b)	2,131.3		—		—		—		2,131.3
Total Spent Nuclear Fuel and Decommissioning Trusts	2,142.6		1,188.7		—		9.9		3,341.2
Total Assets	$	2,383.3	$	2,729.8	$	341.1	$	(1,245.4)	$	4,208.8
Liabilities:
Risk Management Liabilities
Risk Management Commodity Contracts (c) (f)	$	21.8	$	870.9	$	179.0	$	(731.9)	$	339.8
Cash Flow Hedges:
Commodity Hedges (c)	—		74.3		1.7		(52.8)		23.2
Fair Value Hedges	—		127.4		—		—		127.4
Total Risk Management Liabilities	$	21.8	$	1,072.6	$	180.7	$	(784.7)	$	490.4

170

AEP Texas

Assets and Liabilities Measured at Fair Value on a Recurring Basis

September 30, 2023

	Level 1		Level 2		Level 3		Other		Total
Assets:	(in millions)
Restricted Cash for Securitized Funding	$	46.9	$	—	$	—	$	—	$	46.9
Risk Management Assets
Risk Management Commodity Contracts (g)	—		0.4		—		—		0.4
Total Assets	$	46.9	$	0.4	$	—	$	—	$	47.3

December 31, 2022

	Level 1		Level 2		Level 3		Other		Total
Assets:	(in millions)
Restricted Cash for Securitized Funding	$	32.7	$	—	$	—	$	—	$	32.7

APCo

Assets and Liabilities Measured at Fair Value on a Recurring Basis

September 30, 2023

	Level 1		Level 2		Level 3		Other		Total
Assets:	(in millions)
Restricted Cash for Securitized Funding	$	6.9	$	—	$	—	$	—	$	6.9
Risk Management Assets
Risk Management Commodity Contracts (c) (g)	—		3.8		45.2		(2.4)		46.6
Total Assets	$	6.9	$	3.8	$	45.2	$	(2.4)	$	53.5
Liabilities:
Risk Management Liabilities
Risk Management Commodity Contracts (c) (g)	$	—	$	5.0	$	0.1	$	(2.4)	$	2.7

December 31, 2022

	Level 1		Level 2		Level 3		Other		Total
Assets:	(in millions)
Restricted Cash for Securitized Funding	$	14.4	$	—	$	—	$	—	$	14.4
Risk Management Assets
Risk Management Commodity Contracts (c) (g)	—		0.7		69.4		(1.0)		69.1
Total Assets	$	14.4	$	0.7	$	69.4	$	(1.0)	$	83.5
Liabilities:
Risk Management Liabilities
Risk Management Commodity Contracts (c) (g)	$	—	$	4.6	$	0.3	$	(1.4)	$	3.5

171

I&M

Assets and Liabilities Measured at Fair Value on a Recurring Basis

September 30, 2023

	Level 1		Level 2		Level 3		Other		Total
Assets:	(in millions)
Risk Management Assets
Risk Management Commodity Contracts (c) (g)	$	—	$	18.1	$	7.9	$	(4.8)	$	21.2
Spent Nuclear Fuel and Decommissioning Trusts
Cash and Cash Equivalents (e)	10.0		—		—		10.5		20.5
Fixed Income Securities:
United States Government	—		1,204.7		—		—		1,204.7
Corporate Debt	—		136.8		—		—		136.8
State and Local Government	—		3.2		—		—		3.2
Subtotal Fixed Income Securities	—		1,344.7		—		—		1,344.7
Equity Securities - Domestic (b)	2,174.5		—		—		—		2,174.5
Total Spent Nuclear Fuel and Decommissioning Trusts	2,184.5		1,344.7		—		10.5		3,539.7
Total Assets	$	2,184.5	$	1,362.8	$	7.9	$	5.7	$	3,560.9
Liabilities:
Risk Management Liabilities
Risk Management Commodity Contracts (c) (g)	$	—	$	4.2	$	1.3	$	(4.4)	$	1.1

December 31, 2022

	Level 1		Level 2		Level 3		Other		Total
Assets:	(in millions)
Risk Management Assets
Risk Management Commodity Contracts (c) (g)	$	—	$	11.3	$	5.3	$	(1.2)	$	15.4
Spent Nuclear Fuel and Decommissioning Trusts
Cash and Cash Equivalents (e)	11.3		—		—		9.9		21.2
Fixed Income Securities:
United States Government	—		1,123.8		—		—		1,123.8
Corporate Debt	—		61.6		—		—		61.6
State and Local Government	—		3.3		—		—		3.3
Subtotal Fixed Income Securities	—		1,188.7		—		—		1,188.7
Equity Securities - Domestic (b)	2,131.3		—		—		—		2,131.3
Total Spent Nuclear Fuel and Decommissioning Trusts	2,142.6		1,188.7		—		9.9		3,341.2
Total Assets	$	2,142.6	$	1,200.0	$	5.3	$	8.7	$	3,356.6
Liabilities:
Risk Management Liabilities
Risk Management Commodity Contracts (c) (g)	$	—	$	0.6	$	0.7	$	(1.3)	$	—

172

OPCo

Assets and Liabilities Measured at Fair Value on a Recurring Basis

September 30, 2023

	Level 1		Level 2		Level 3		Other		Total
Assets:	(in millions)
Risk Management Assets
Risk Management Commodity Contracts (g)	$	—	$	0.3	$	—	$	—	$	0.3
Liabilities:
Risk Management Liabilities
Risk Management Commodity Contracts (g)	$	—	$	—	$	51.6	$	—	$	51.6

December 31, 2022

	Level 1		Level 2		Level 3		Other		Total
Liabilities:	(in millions)
Risk Management Liabilities
Risk Management Commodity Contracts (c) (g)	$	—	$	—	$	40.0	$	(0.3)	$	39.7

PSO

Assets and Liabilities Measured at Fair Value on a Recurring Basis

September 30, 2023

	Level 1		Level 2		Level 3		Other		Total
Assets:	(in millions)
Risk Management Assets
Risk Management Commodity Contracts (c) (g)	$	—	$	0.5	$	28.1	$	(0.4)	$	28.2
Liabilities:
Risk Management Liabilities
Risk Management Commodity Contracts (c) (g)	$	—	$	6.6	$	0.9	$	(0.3)	$	7.2

December 31, 2022

	Level 1		Level 2		Level 3		Other		Total
Assets:	(in millions)
Risk Management Assets
Risk Management Commodity Contracts (c) (g)	$	—	$	—	$	24.0	$	1.3	$	25.3
Cash Flow Hedges:
Interest Rate Hedges	—		1.6		—		(1.6)		—
Total Assets	$	—	$	1.6	$	24.0	$	(0.3)	$	25.3
Liabilities:
Risk Management Liabilities
Risk Management Commodity Contracts (c) (g)	$	—	$	1.7	$	0.3	$	(0.4)	$	1.6

173

SWEPCo

Assets and Liabilities Measured at Fair Value on a Recurring Basis

September 30, 2023

	Level 1		Level 2		Level 3		Other		Total
Assets:	(in millions)
Risk Management Assets
Risk Management Commodity Contracts (c) (g)	$	—	$	0.2	$	17.4	$	(0.5)	$	17.1
Liabilities:
Risk Management Liabilities
Risk Management Commodity Contracts (c) (g)	$	—	$	3.1	$	0.9	$	(0.5)	$	3.5

December 31, 2022

	Level 1		Level 2		Level 3		Other		Total
Assets:	(in millions)
Risk Management Assets
Risk Management Commodity Contracts (c) (g)	$	—	$	2.2	$	14.6	$	(0.4)	$	16.4
Liabilities:
Risk Management Liabilities
Risk Management Commodity Contracts (c) (g)	$	—	$	1.6	$	0.4	$	(0.6)	$	1.4

(a)Amounts in “Other’’ column primarily represent cash deposits in bank accounts with financial institutions or third-parties.  Level 1 and Level 2 amounts primarily represent investments in money market funds.

(b)Amounts represent publicly traded equity securities and equity-based mutual funds.

(c)Amounts in “Other’’ column primarily represent counterparty netting of risk management and hedging contracts and associated cash collateral under the accounting guidance for “Derivatives and Hedging.’’

(d)The September 30, 2023 maturities of the net fair value of risk management contracts prior to cash collateral, assets/(liabilities), were as follows: Level 1 matures $(4) million in 2023 and $(9) million in periods 2024-2026; Level 2 matures $64 million in periods 2024-2026, $10 million in periods 2027-2028 and $1 million in periods 2029-2033; Level 3 matures $37 million in 2023, $118 million in periods 2024-2026, $18 million in periods 2027-2028 and $(9) million in periods 2029-2033.  Risk management commodity contracts are substantially comprised of power contracts.

(e)Amounts in “Other’’ column primarily represent accrued interest receivables from financial institutions.  Level 1 amounts primarily represent investments in money market funds.

(f)The December 31, 2022 maturities of the net fair value of risk management contracts prior to cash collateral, assets/(liabilities), were as follows: Level 1 matures $(7) million in 2023; Level 2 matures $182 million in 2023, $134 million in periods 2024-2026, $10 million in periods 2027-2028 and $1 million in periods 2029-2033; Level 3 matures $128 million in 2023, $6 million in periods 2024-2026, $6 million in periods 2027-2028 and $(5) million in periods 2029-2033.  Risk management commodity contracts are substantially comprised of power contracts.

(g)Substantially comprised of power contracts for the Registrant Subsidiaries.

174

The following tables set forth a reconciliation of changes in the fair value of net trading derivatives classified as Level 3 in the fair value hierarchy:

Three Months Ended September 30, 2023	AEP		APCo		I&M		OPCo		PSO		SWEPCo
	(in millions)
Balance as of June 30, 2023	$	126.1	$	39.4	$	6.8	$	(54.0)	$	43.1	$	26.0
Realized Gain (Loss) Included in Net Income (or Changes in Net Assets) (a) (b)	39.7		10.0		2.3		—		14.2		14.0
Unrealized Gain (Loss) Included in Net Income (or Changes in Net Assets) Relating to Assets Still Held at the Reporting Date (a)	72.7		—		—		—		—		—
Realized and Unrealized Gains (Losses) Included in Other Comprehensive Income (c)	4.9		—		—		—		—		—
Settlements	(87.1)		(16.5)		(3.7)		1.1		(30.5)		(24.8)
Transfers out of Level 3 (e)	6.6		0.1		(0.1)		—		—		—
Changes in Fair Value Allocated to Regulated Jurisdictions (f)	19.9		12.1		1.3		1.3		0.4		1.3
Balance as of September 30, 2023	$	182.8	$	45.1	$	6.6	$	(51.6)	$	27.2	$	16.5

Three Months Ended September 30, 2022	AEP		APCo		I&M		OPCo		PSO		SWEPCo
	(in millions)
Balance as of June 30, 2022	$	283.9	$	79.6	$	9.8	$	(48.4)	$	64.5	$	45.4
Realized Gain (Loss) Included in Net Income (or Changes in Net Assets) (a) (b)	64.3		20.1		2.1		0.3		23.8		15.4
Unrealized Gain (Loss) Included in Net Income (or Changes in Net Assets) Relating to Assets Still Held at the Reporting Date (a)	(12.6)		—		—		—		—		—
Realized and Unrealized Gains (Losses) Included in Other Comprehensive Income (c)	13.1		—		—		—		—		—
Settlements	(138.3)		(34.6)		(4.8)		(1.1)		(49.1)		(31.6)
Transfers into Level 3 (d) (e)	(0.5)		—		—		—		—		—
Transfers out of Level 3 (e)	3.5		—		—		—		—		—
Changes in Fair Value Allocated to Regulated Jurisdictions (f)	72.5		41.5		2.5		6.0		5.2		7.0
Balance as of September 30, 2022	$	285.9	$	106.6	$	9.6	$	(43.2)	$	44.4	$	36.2

175

Nine Months Ended September 30, 2023	AEP		APCo		I&M		OPCo		PSO		SWEPCo
	(in millions)
Balance as of December 31, 2022	$	160.4	$	69.1	$	4.6	$	(40.0)	$	23.7	$	14.2
Realized Gain (Loss) Included in Net Income (or Changes in Net Assets) (a) (b)	(41.3)		(47.0)		(1.7)		(2.4)		3.5		5.9
Unrealized Gain (Loss) Included in Net Income (or Changes in Net Assets) Relating to Assets Still Held at the Reporting Date (a)	67.7		—		—		—		—		—
Realized and Unrealized Gains (Losses) Included in Other Comprehensive Income (c)	(10.5)		—		—		—		—		—
Settlements	(85.9)		(22.1)		(2.9)		3.5		(27.2)		(20.0)
Transfers into Level 3 (d) (e)	(6.1)		—		—		—		—		—
Transfers out of Level 3 (e)	3.8		—		—		—		—		—
Changes in Fair Value Allocated to Regulated Jurisdictions (f)	94.7		45.1		6.6		(12.7)		27.2		16.4
Balance as of September 30, 2023	$	182.8	$	45.1	$	6.6	$	(51.6)	$	27.2	$	16.5

Nine Months Ended September 30, 2022	AEP		APCo		I&M		OPCo		PSO		SWEPCo
	(in millions)
Balance as of December 31, 2021	$	103.1	$	41.7	$	(0.7)	$	(92.5)	$	12.1	$	10.9
Realized Gain (Loss) Included in Net Income (or Changes in Net Assets) (a) (b)	69.3		3.0		3.7		4.6		24.2		35.8
Unrealized Gain (Loss) Included in Net Income (or Changes in Net Assets) Relating to Assets Still Held at the Reporting Date (a)	(44.6)		—		—		—		—		—
Realized and Unrealized Gains (Losses) Included in Other Comprehensive Income (c)	29.4		—		—		—		—		—
Settlements	(153.8)		(44.7)		(3.0)		0.2		(36.3)		(45.0)
Transfers into Level 3 (d) (e)	1.7		—		—		—		—		—
Transfers out of Level 3 (e)	13.2		—		—		—		—		—
Changes in Fair Value Allocated to Regulated Jurisdictions (f)	267.6		106.6		9.6		44.5		44.4		34.5
Balance as of September 30, 2022	$	285.9	$	106.6	$	9.6	$	(43.2)	$	44.4	$	36.2

(a)Included in revenues on the statements of income.

(b)Represents the change in fair value between the beginning of the reporting period and the settlement of the risk management commodity contract.

(c)Included in cash flow hedges on the statements of comprehensive income.

(d)Represents existing assets or liabilities that were previously categorized as Level 2.

(e)Transfers are recognized based on their value at the beginning of the reporting period that the transfer occurred.

(f)Relates to the net gains (losses) of those contracts that are not reflected on the statements of income.  These changes in fair value are recorded as regulatory liabilities for net gains and as regulatory assets for net losses or accounts payable.

176

The following tables quantify the significant unobservable inputs used in developing the fair value of Level 3 positions:

Significant Unobservable Inputs

September 30, 2023

							Significant	Input/Range
	Type of	Fair Value				Valuation	Unobservable					Weighted
Company	Input	Assets		Liabilities		Technique	Input	Low		High		Average (c)
		(in millions)
AEP	Energy Contracts	$	224.3	$	147.7	Discounted Cash Flow	Forward Market Price (a)	$	5.98	$	137.52	$	45.43
AEP	Natural Gas Contracts	—		0.2		Discounted Cash Flow	Forward Market Price (b)	3.55		3.55		3.55
AEP	FTRs	114.2		7.8		Discounted Cash Flow	Forward Market Price (a)	(17.92)		17.07		0.29
APCo	FTRs	45.2		0.1		Discounted Cash Flow	Forward Market Price (a)	(3.92)		9.08		1.63
I&M	FTRs	7.9		1.3		Discounted Cash Flow	Forward Market Price (a)	(4.36)		9.08		1.08
OPCo	Energy Contracts	—		51.6		Discounted Cash Flow	Forward Market Price (a)	19.89		65.40		41.66
PSO	FTRs	28.1		0.9		Discounted Cash Flow	Forward Market Price (a)	(17.92)		2.04		(4.42)
SWEPCo	Natural Gas Contracts	—		0.2		Discounted Cash Flow	Forward Market Price (b)	3.55		3.55		3.55
SWEPCo	FTRs	17.4		0.7		Discounted Cash Flow	Forward Market Price (a)	(17.92)		2.04		(4.42)

December 31, 2022

							Significant	Input/Range
	Type of	Fair Value				Valuation	Unobservable					Weighted
Company	Input	Assets		Liabilities		Technique	Input (a)	Low		High		Average (c)
		(in millions)
AEP	Energy Contracts	$	204.0	$	167.4	Discounted Cash Flow	Forward Market Price	$	2.91	$	187.34	$	49.14
AEP	FTRs	137.1		13.3		Discounted Cash Flow	Forward Market Price	(36.45)		20.72		1.18
APCo	FTRs	69.4		0.3		Discounted Cash Flow	Forward Market Price	(2.82)		18.88		3.89
I&M	FTRs	5.3		0.7		Discounted Cash Flow	Forward Market Price	0.16		18.79		1.23
OPCo	Energy Contracts	—		40.0		Discounted Cash Flow	Forward Market Price	2.91		187.34		48.76
PSO	FTRs	24.0		0.3		Discounted Cash Flow	Forward Market Price	(36.45)		3.40		(7.55)
SWEPCo	FTRs	14.6		0.4		Discounted Cash Flow	Forward Market Price	(36.45)		3.40		(7.55)

(a)Represents market prices in dollars per MWh.

(b)Represents market prices in dollars per MMBtu.

(c)The weighted average is the product of the forward market price of the underlying commodity and volume weighted by term.

177

The following table provides the measurement uncertainty of fair value measurements to increases (decreases) in significant unobservable inputs related to Energy Contracts and FTRs for the Registrants as of September 30, 2023 and December 31, 2022:

Significant Unobservable Input	Position	Change in Input	Impact on Fair Value Measurement
Forward Market Price	Buy	Increase (Decrease)	Higher (Lower)
Forward Market Price	Sell	Increase (Decrease)	Lower (Higher)

178

11.  INCOME TAXES

The disclosures in this note apply to all Registrants unless indicated otherwise.

Effective Tax Rates (ETR)

The Registrants’ interim ETR reflect the estimated annual ETR for 2023 and 2022, adjusted for tax expense associated with certain discrete items.

The Registrants include the amortization of Excess ADIT not subject to normalization requirements in the annual estimated ETR when regulatory proceedings instruct the Registrants to provide the benefits of Tax Reform to customers over multiple interim periods.  Certain regulatory proceedings instruct the Registrants to provide the benefits of Tax Reform to customers in a single period (e.g. by applying the Excess ADIT not subject to normalization requirements against an existing regulatory asset balance) and in these circumstances, the Registrants recognize the tax benefit discretely in the period recorded. The annual amount of Excess ADIT approved by the Registrant’s regulatory commissions may not impact the ETR ratably during each interim period due to the variability of pretax book income between interim periods and the application of an annual estimated ETR.

The ETR for each of the Registrants are included in the following tables:

	Three Months Ended September 30, 2023
	AEP		AEP Texas		AEPTCo		APCo		I&M		OPCo		PSO		SWEPCo
U.S. Federal Statutory Rate	21.0	%	21.0	%	21.0	%	21.0	%	21.0	%	21.0	%	21.0	%	21.0	%
Increase (decrease) due to:
State Income Tax, net of Federal Benefit	1.4	%	0.5	%	2.8	%	2.2	%	2.1	%	0.8	%	3.0	%	(4.3)	%
Tax Reform Excess ADIT Reversal	(5.7)	%	(1.3)	%	(0.2)	%	(5.3)	%	(8.5)	%	(6.8)	%	(17.0)	%	(6.2)	%
Production and Investment Tax Credits	(5.1)	%	0.1	%	—	%	(0.1)	%	(0.7)	%	—	%	(46.9)	%	(25.5)	%
Flow Through	0.1	%	0.2	%	0.3	%	1.8	%	0.7	%	0.8	%	0.3	%	(0.2)	%
AFUDC Equity	(1.4)	%	(1.4)	%	(2.4)	%	(1.5)	%	(0.5)	%	(0.8)	%	(1.6)	%	(0.8)	%
Discrete Tax Adjustments	(4.1)	%	—	%	—	%	—	%	—	%	—	%	—	%	—	%
Other	0.1	%	(0.5)	%	(1.0)	%	0.7	%	(3.5)	%	1.3	%	(0.2)	%	0.2	%
Effective Income Tax Rate	6.3	%	18.6	%	20.5	%	18.8	%	10.6	%	16.3	%	(41.4)	%	(15.8)	%

	Three Months Ended September 30, 2022
	AEP		AEP Texas		AEPTCo		APCo		I&M		OPCo		PSO		SWEPCo
U.S. Federal Statutory Rate	21.0	%	21.0	%	21.0	%	21.0	%	21.0	%	21.0	%	21.0	%	21.0	%
Increase (decrease) due to:
State Income Tax, net of Federal Benefit	(0.8)	%	0.5	%	2.6	%	(6.2)	%	2.7	%	0.7	%	3.0	%	(5.3)	%
Tax Reform Excess ADIT Reversal	(9.7)	%	(2.0)	%	0.3	%	(8.6)	%	(13.3)	%	(6.2)	%	(21.9)	%	(4.6)	%
Production and Investment Tax Credits	(12.0)	%	(0.4)	%	—	%	—	%	—	%	—	%	(43.7)	%	(24.1)	%
Flow Through	(0.3)	%	0.2	%	0.3	%	(0.7)	%	(1.5)	%	0.4	%	0.4	%	(1.3)	%
AFUDC Equity	(1.4)	%	(1.2)	%	(1.9)	%	(0.4)	%	(0.6)	%	(0.8)	%	(0.4)	%	(0.2)	%
Discrete Tax Adjustments	(0.2)	%	—	%	—	%	—	%	—	%	—	%	—	%	—	%
Other	1.0	%	0.2	%	0.2	%	—	%	(0.5)	%	0.2	%	0.2	%	(0.2)	%
Effective Income Tax Rate	(2.4)	%	18.3	%	22.5	%	5.1	%	7.8	%	15.3	%	(41.4)	%	(14.7)	%

179

	Nine Months Ended September 30, 2023
	AEP		AEP Texas		AEPTCo		APCo		I&M		OPCo		PSO		SWEPCo
U.S. Federal Statutory Rate	21.0	%	21.0	%	21.0	%	21.0	%	21.0	%	21.0	%	21.0	%	21.0	%
Increase (decrease) due to:
State Income Tax, net of Federal Benefit	1.7	%	0.5	%	2.7	%	2.4	%	2.3	%	0.9	%	2.8	%	(2.9)	%
Tax Reform Excess ADIT Reversal	(6.0)	%	(1.3)	%	0.1	%	(4.8)	%	(7.6)	%	(7.3)	%	(17.1)	%	(5.3)	%
Production and Investment Tax Credits	(7.4)	%	—	%	—	%	(0.1)	%	(0.6)	%	—	%	(48.9)	%	(26.7)	%
Flow Through	(0.2)	%	0.2	%	0.3	%	0.1	%	(1.7)	%	0.8	%	0.3	%	(0.3)	%
AFUDC Equity	(1.4)	%	(1.2)	%	(2.0)	%	(1.2)	%	(0.4)	%	(0.8)	%	(1.5)	%	(0.5)	%
Discrete Tax Adjustments	(2.8)	%	—	%	—	%	1.5	%	0.7	%	—	%	—	%	—	%
Other	0.3	%	(0.2)	%	(0.5)	%	0.4	%	(1.2)	%	0.5	%	(0.2)	%	0.2	%
Effective Income Tax Rate	5.2	%	19.0	%	21.6	%	19.3	%	12.5	%	15.1	%	(43.6)	%	(14.5)	%

	Nine Months Ended September 30, 2022
	AEP		AEP Texas		AEPTCo		APCo		I&M		OPCo		PSO		SWEPCo
U.S. Federal Statutory Rate	21.0	%	21.0	%	21.0	%	21.0	%	21.0	%	21.0	%	21.0	%	21.0	%
Increase (decrease) due to:
State Income Tax, net of Federal Benefit	0.7	%	0.5	%	2.7	%	(0.8)	%	1.3	%	0.8	%	3.2	%	(1.5)	%
Tax Reform Excess ADIT Reversal	(7.8)	%	(2.0)	%	0.3	%	(10.3)	%	(15.7)	%	(7.3)	%	(20.8)	%	(4.8)	%
Production and Investment Tax Credits	(8.7)	%	(0.4)	%	—	%	—	%	(1.4)	%	—	%	(39.5)	%	(22.5)	%
Flow Through	—	%	0.2	%	0.3	%	0.2	%	(1.6)	%	0.5	%	0.3	%	(0.8)	%
AFUDC Equity	(1.1)	%	(1.2)	%	(1.9)	%	(0.8)	%	(0.8)	%	(0.7)	%	(0.4)	%	(0.4)	%
Discrete Tax Adjustments	(0.2)	%	—	%	—	%	(1.8)	%	—	%	—	%	—	%	0.3	%
Other	0.6	%	0.1	%	0.1	%	—	%	0.2	%	0.1	%	0.2	%	—	%
Effective Income Tax Rate	4.5	%	18.2	%	22.5	%	7.5	%	3.0	%	14.4	%	(36.0)	%	(8.7)	%

Federal and State Income Tax Audit Status

The statute of limitations for the IRS to examine AEP and subsidiaries originally filed federal return has expired for tax years 2016 and earlier. AEP has agreed to extend the statute of limitations on the 2017-2019 tax returns to October 31, 2024, to allow time for the current IRS audit to be completed including a refund claim approval by the Congressional Joint Committee on Taxation. The statute of limitations for the 2020 return is set to naturally expire in October 2024 as well.

The current IRS audit and associated refund claim evolved from a net operating loss carryback to 2015 that originated in the 2017 return. AEP has received and agreed to immaterial IRS proposed adjustments on the 2017 tax return. The exam is nearly complete, and AEP is currently working with the IRS to submit the refund claim to the Congressional Joint Committee on Taxation for resolution and final approval.

AEP and subsidiaries file income tax returns in various state and local jurisdictions. These taxing authorities routinely examine the tax returns, and AEP and subsidiaries are currently under examination in several state and local jurisdictions. Generally, the statutes of limitations have expired for tax years prior to 2017. In addition, management is monitoring and continues to evaluate the potential impact of federal legislation and corresponding state conformity.

180

Federal Legislation

In August 2022, President Biden signed H.R. 5376 into law, commonly known as the Inflation Reduction Act of 2022, or IRA. Most notably this budget reconciliation legislation creates a 15% minimum tax on adjusted financial statement income (Corporate Alternative Minimum Tax or CAMT), extends and increases the value of PTCs and ITCs, adds a nuclear and clean hydrogen PTC, an energy storage ITC and allows the sale or transfer of tax credits to third parties for cash. As further significant guidance from Treasury and the IRS is expected on the tax provisions in the IRA, AEP will continue to monitor any issued guidance and evaluate the impact on future net income, cash flows and financial condition.

In December 2022, the IRS released Notice 2023-7, which provided initial CAMT guidance that AEP can begin to rely on in 2023. Notably, the interim guidance in Notice 2023-7 confirmed the CAMT depreciation adjustment includes tax depreciation that is capitalized to inventory under §263A and recovered as part of cost of goods sold, providing significant relief to AEP’s potential CAMT exposure. In September 2023, the IRS released Notice 2023-64, which clarifies and supplements items in Notice 2023-7 and stated that additional guidance in the form of proposed regulations is expected. AEP will continue to monitor and assess any additional guidance.

AEP and subsidiaries expect to be applicable corporations for purposes of the CAMT beginning in 2023. CAMT cash taxes are expected to be partially offset by regulatory recovery, the utilization of tax credits and additionally the cash inflow generated by the sale of tax credits. The sale of tax credits are presented in the operating section of the statements of cash flows consistent with the presentation of cash taxes paid. AEP presents the loss on sale of tax credits through income tax expense.

In June 2023, the IRS issued temporary regulations related to the transfer of tax credits. In the third quarter of 2023, AEP, on behalf of PSO and SWEPCo, entered into a transferability agreement with a nonaffiliated party to sell PTCs resulting in cash proceeds of approximately $80 million expected in the fourth quarter of 2023. AEP expects to continue to explore the ability to efficiently monetize its tax credits through third party transferability agreements.

181

12.  FINANCING ACTIVITIES

The disclosures in this note apply to all Registrants, unless indicated otherwise.

Common Stock (Applies to AEP)

At-the-Market (ATM) Program

In 2020, AEP filed a prospectus supplement and executed an Equity Distribution Agreement, pursuant to which AEP may sell, from time to time, up to an aggregate of $1 billion of its common stock through an ATM offering program, including an equity forward sales component. The compensation paid to the selling agents by AEP may be up to 2% of the gross offering proceeds of the shares. There were no issuances under the ATM program for the nine months ended September 30, 2023.

Long-term Debt Outstanding (Applies to AEP)

The following table details long-term debt outstanding, net of issuance costs and premiums or discounts:

Type of Debt	September 30, 2023		December 31, 2022
	(in millions)
Senior Unsecured Notes	$	32,881.6	$	30,174.8
Pollution Control Bonds	1,771.0		1,770.2
Notes Payable	141.5		269.7
Securitization Bonds	407.0		487.8
Spent Nuclear Fuel Obligation (a)	296.3		285.6
Junior Subordinated Notes (b)	2,386.6		2,381.3
Other Long-term Debt	1,605.1		1,431.6
Total Long-term Debt Outstanding	39,489.1		36,801.0
Long-term Debt Due Within One Year	2,773.6		2,486.4
Long-term Debt	$	36,715.5	$	34,314.6

(a)Pursuant to the Nuclear Waste Policy Act of 1982, I&M, a nuclear licensee, has an obligation to the United States Department of Energy for SNF disposal. The obligation includes a one-time fee for nuclear fuel consumed prior to April 7, 1983. Trust fund assets related to this obligation were $345 million and $330 million as of September 30, 2023 and December 31, 2022, respectively, and are included in Spent Nuclear Fuel and Decommissioning Trusts on the balance sheets.

(b)See “Equity Units” section below for additional information.

182

Long-term Debt Activity

Long-term debt and other securities issued, retired and principal payments made during the first nine months of 2023 are shown in the following tables:

		Principal		Interest
Company	Type of Debt	Amount (a)		Rate	Due Date
Issuances:		(in millions)		(%)
AEP	Senior Unsecured Notes	$	850.0	5.63	2033
AEPTCo	Senior Unsecured Notes	700.0		5.40	2053
AEP Texas	Pollution Control Bonds	60.0		4.25	2030
AEP Texas	Senior Unsecured Notes	450.0		5.40	2033
APCo	Other Long-term Debt	200.0		Variable	2024
I&M	Senior Unsecured Notes	500.0		5.63	2053
OPCo	Senior Unsecured Notes	400.0		5.00	2033
PSO	Senior Unsecured Notes	475.0		5.25	2033
SWEPCo	Senior Unsecured Notes	350.0		5.30	2033
Non-Registrant:
KPCo	Pollution Control Bonds	65.0		4.70	2026
Transource Energy	Other Long-term Debt	14.0		Variable	2025
Total Issuances		$	4,064.0

(a)Amounts indicated on the statements of cash flows are net of issuance costs and premium or discount and will not tie to the issuance amounts.

		Principal		Interest
Company	Type of Debt	Amount Paid		Rate	Due Date
Retirements and Principal Payments:		(in millions)		(%)
AEP	Senior Unsecured Notes	$	600.0	Variable	2023
AEP Texas	Pollution Control Bonds	60.0		0.90	2023
AEP Texas	Senior Unsecured Notes	125.0		3.09	2023
AEP Texas	Securitization Bonds	31.5		2.85	2024
AEP Texas	Securitization Bonds	23.5		2.06	2025
APCo	Securitization Bonds	9.7		2.01	2023
APCo	Securitization Bonds	16.8		3.77	2028
I&M	Senior Unsecured Notes	250.0		3.20	2023
I&M	Notes Payable	1.8		Variable	2023
I&M	Notes Payable	3.7		Variable	2024
I&M	Notes Payable	13.8		Variable	2025
I&M	Notes Payable	12.0		0.93	2025
I&M	Notes Payable	20.6		3.44	2026
I&M	Notes Payable	20.5		5.93	2027
I&M	Other Long-term Debt	1.7		6.00	2025
OPCo	Other Long-term Debt	0.6		1.15	2028
PSO	Other Long-term Debt	0.4		3.00	2027
SWEPCo	Notes Payable	25.0		6.37	2024
SWEPCo	Notes Payable	30.9		4.58	2032
SWEPCo	Other Long-Term Debt	38.2		4.68	2028
Non-Registrant:
KPCo	Pollution Control Bonds	65.0		2.35	2023
Transource Energy	Senior Unsecured Notes	2.6		2.75	2050
Total Retirements and Principal Payments		$	1,353.3

183

Long-term Debt Subsequent Event

In October 2023, I&M retired $4 million of Notes Payable related to DCC Fuel.

In October 2023, Transource Energy issued $3.5 million of variable rate Other Long-term Debt due in 2025.

In November 2023, AEP retired $450 million of Senior Unsecured Notes.

Equity Units (Applies to AEP)

2020 Equity Units

In August 2020, AEP issued 17 million Equity Units initially in the form of corporate units, at a stated amount of $50 per unit, for a total stated amount of $850 million. Net proceeds from the issuance were approximately $833 million. The proceeds were used to support AEP’s overall capital expenditure plans.

Each corporate unit represents a 1/20 undivided beneficial ownership interest in $1,000 principal amount of AEP’s 1.30% Junior Subordinated Notes due in 2025 and a forward equity purchase contract which settled after three years in August 2023. In June 2023, AEP successfully remarketed the Junior Subordinated Notes on behalf of holders of the corporate units. AEP did not receive any proceeds from the remarketing which were used to purchase a portfolio of treasury securities that matured on August 14, 2023. On August 15, 2023, the proceeds from the treasury portfolio were used to settle the forward equity purchase contract with AEP. The interest rate on the Junior Subordinated Notes was reset to 5.699% with the maturity remaining in 2025. In August 2023, AEP issued 10,048,668 shares of AEP common stock and received proceeds totaling $850 million under the settlement of the forward equity purchase contract. AEP common stock held in treasury was used to settle the forward equity purchase contract. The proceeds were used to pay down debt balances and support AEP’s overall capital expenditure plans.

Debt Covenants (Applies to AEP and AEPTCo)

Covenants in AEPTCo’s note purchase agreements and indenture limit the amount of contractually-defined priority debt (which includes a further sub-limit of $50 million of secured debt) to 10% of consolidated tangible net assets. AEPTCo’s contractually-defined priority debt was 0.9% of consolidated tangible net assets as of September 30, 2023. The method for calculating the consolidated tangible net assets is contractually-defined in the note purchase agreements.

Dividend Restrictions

Utility Subsidiaries’ Restrictions

Parent depends on its utility subsidiaries to pay dividends to shareholders. AEP utility subsidiaries pay dividends to Parent provided funds are legally available. Various financing arrangements and regulatory requirements may impose certain restrictions on the ability of the subsidiaries to transfer funds to Parent in the form of dividends.

All of the dividends declared by AEP’s utility subsidiaries that provide transmission or local distribution services are subject to a Federal Power Act requirement that prohibits the payment of dividends out of capital accounts in certain circumstances; payment of dividends is generally allowed out of retained earnings. The Federal Power Act also creates a reserve on earnings attributable to hydroelectric generation plants. Because of their ownership of such plants, this reserve applies to APCo and I&M.

Certain AEP subsidiaries have credit agreements that contain covenants that limit their debt to capitalization ratio to 67.5%. The method for calculating outstanding debt and capitalization is contractually-defined in the credit agreements.

The Federal Power Act restriction does not limit the ability of the AEP subsidiaries to pay dividends out of retained earnings.

184

Parent Restrictions (Applies to AEP)

The holders of AEP’s common stock are entitled to receive the dividends declared by the Board of Directors provided funds are legally available for such dividends. Parent’s income primarily derives from common stock equity in the earnings of its utility subsidiaries.

Pursuant to the leverage restrictions in credit agreements, AEP must maintain a percentage of debt to total capitalization at a level that does not exceed 67.5%. The method for calculating outstanding debt and capitalization is contractually-defined in the credit agreements.

Corporate Borrowing Program - AEP System (Applies to all Registrant Subsidiaries)

The AEP System uses a corporate borrowing program to meet the short-term borrowing needs of AEP’s subsidiaries. The corporate borrowing program includes a Utility Money Pool, which funds AEP’s utility subsidiaries; a Nonutility Money Pool, which funds certain AEP nonutility subsidiaries; and direct borrowing from AEP. The AEP System Utility Money Pool operates in accordance with the terms and conditions of its agreement filed with the FERC. The amounts of outstanding loans to (borrowings from) the Utility Money Pool as of September 30, 2023 and December 31, 2022 are included in Advances to Affiliates and Advances from Affiliates, respectively, on the Registrant Subsidiaries’ balance sheets. The Utility Money Pool participants’ activity and corresponding authorized borrowing limits for the nine months ended September 30, 2023 are described in the following table:

	Maximum					Average				Net Loans to
	Borrowings			Maximum		Borrowings		Average		(Borrowings from)		Authorized
	from the			Loans to the		from the		Loans to the		the Utility Money		Short-term
	Utility			Utility		Utility		Utility		Pool as of		Borrowing
Company	Money Pool			Money Pool		Money Pool		Money Pool		September 30, 2023		Limit
	(in millions)
AEP Texas	$	477.5		$	42.0	$	250.4	$	42.0	$	42.0	$	500.0
AEPTCo	471.3			309.4		134.3		76.0		7.2		820.0		(a)
APCo	388.6			19.8		280.8		19.0		(183.2)		500.0
I&M	475.3			112.2		126.0		49.3		21.2		500.0
OPCo	485.7			64.7		207.1		40.2		(113.3)		500.0
PSO	375.0			121.5		106.3		53.9		9.2		400.0
SWEPCo	401.6		(b)	25.8		165.3		16.5		(48.9)		400.0

(a)    Amount represents the combined authorized short-term borrowing limit the State Transcos have from FERC or state regulatory commissions.

(b)    SWEPCo’s maximum borrowings from the Utility Money Pool exceeded the authorized short-term borrowing limit by $1.6 million on March 15, 2023. On March 16, 2023, SWEPCo’s borrowings from the Utility Money Pool were reduced below the $400 million authorized limit and borrowings have continued to remain below the authorized limit.

The activity in the above table does not include short-term lending activity of certain AEP nonutility subsidiaries. AEP Texas’ wholly-owned subsidiary, AEP Texas North Generation Company, LLC and SWEPCo’s wholly-owned subsidiary, Mutual Energy SWEPCo, LLC participate in the Nonutility Money Pool. The amounts of outstanding loans to the Nonutility Money Pool as of September 30, 2023 and December 31, 2022 are included in Advances to Affiliates on the subsidiaries’ balance sheets. The Nonutility Money Pool participants’ activity for the nine months ended September 30, 2023 is described in the following table:

		Maximum Loans		Average Loans		Loans to the Nonutility
		to the Nonutility		to the Nonutility		Money Pool as of
Company		Money Pool		Money Pool		September 30, 2023
	(in millions)
AEP Texas		$	7.0	$	6.9	$	7.0
SWEPCo		2.7		2.3		2.7

185

AEP has a direct financing relationship with AEPTCo to meet its short-term borrowing needs. The amounts of borrowings from AEP as of September 30, 2023 and December 31, 2022 are included in Advances from Affiliates on AEPTCo’s balance sheets. AEPTCo’s direct borrowing and lending activity with AEP and corresponding authorized borrowing limit for the nine months ended September 30, 2023 are described in the following table:

Maximum

Maximum

Average

Average

Borrowings from

Loans to

Authorized

Borrowings

Loans

Borrowings

Loans

AEP as of

AEP as of

Short-term

from AEP

to AEP

from AEP

to AEP

September 30, 2023

September 30, 2023

Borrowing Limit

(in millions)

$

37.9

$

158.1

$

3.0

$

67.5

$

33.4

$

—

$

50.0

(a)

(a)    Amount represents the combined authorized short-term borrowing limit the State Transcos have from FERC or state regulatory commissions.

The maximum and minimum interest rates for funds either borrowed from or loaned to the Utility Money Pool are summarized in the following table:

	Nine Months Ended September 30,
	2023		2022
Maximum Interest Rate	5.81	%	3.39	%
Minimum Interest Rate	4.66	%	0.10	%

The average interest rates for funds borrowed from and loaned to the Utility Money Pool are summarized for all Registrant Subsidiaries in the following table:

	Average Interest Rate for Funds				Average Interest Rate for Funds
	Borrowed from the Utility Money Pool				Loaned to the Utility Money Pool
	for Nine Months Ended September 30,				for Nine Months Ended September 30,
Company	2023		2022		2023		2022
AEP Texas	5.44	%	0.90	%	5.70	%	1.82	%
AEPTCo	5.29	%	1.03	%	5.52	%	2.14	%
APCo	5.47	%	1.39	%	5.47	%	2.13	%
I&M	5.13	%	1.38	%	5.54	%	1.46	%
OPCo	5.37	%	1.81	%	5.60	%	1.22	%
PSO	5.48	%	1.70	%	5.24	%	0.75	%
SWEPCo	5.25	%	1.67	%	5.72	%	0.55	%

Maximum, minimum and average interest rates for funds loaned to the Nonutility Money Pool are summarized in the following table:

Nine Months Ended September 30, 2023

Nine Months Ended September 30, 2022

Maximum

Minimum

Average

Maximum

Minimum

Average

Interest Rate

Interest Rate

Interest Rate

Interest Rate

Interest Rate

Interest Rate

for Funds

for Funds

for Funds

for Funds

for Funds

for Funds

Loaned to

Loaned to

Loaned to

Loaned to

Loaned to

Loaned to

the Nonutility

the Nonutility

the Nonutility

the Nonutility

the Nonutility

the Nonutility

Company

Money Pool

Money Pool

Money Pool

Money Pool

Money Pool

Money Pool

AEP Texas

5.81

%

4.66

%

5.47

%

3.39

%

0.46

%

1.51

%

SWEPCo

5.81

%

4.66

%

5.49

%

3.39

%

0.46

%

1.52

%

186

AEPTCo’s maximum, minimum and average interest rates for funds either borrowed from or loaned to AEP are summarized in the following table:

	Maximum		Minimum		Maximum		Minimum		Average		Average
	Interest Rate		Interest Rate		Interest Rate		Interest Rate		Interest Rate		Interest Rate
Nine Months	for Funds		for Funds		for Funds		for Funds		for Funds		for Funds
Ended	Borrowed		Borrowed		Loaned		Loaned		Borrowed		Loaned
September 30,	from AEP		from AEP		to AEP		to AEP		from AEP		to AEP
2023	5.81	%	4.53	%	5.81	%	4.53	%	5.43	%	5.46	%
2022	3.39	%	0.46	%	3.37	%	0.46	%	1.56	%	1.38	%

Short-term Debt (Applies to AEP and SWEPCo)

Outstanding short-term debt was as follows:

		September 30, 2023				December 31, 2022
		Outstanding		Interest		Outstanding		Interest
Company	Type of Debt	Amount		Rate (a)		Amount		Rate (a)
		(dollars in millions)
AEP	Securitized Debt for Receivables (b)	$	900.0	5.60	%	$	750.0	4.67	%
AEP	Commercial Paper	1,826.5		5.64	%	2,862.2		4.80	%
AEP	Term Loan	—		—	%	150.0		5.17	%
AEP	Term Loan	—		—	%	125.0		5.17	%
AEP	Term Loan	—		—	%	100.0		5.23	%
AEP	Term Loan	—		—	%	125.0		4.87	%
SWEPCo	Notes Payable	3.9		7.67	%	—		—	%
	Total Short-term Debt	$	2,730.4			$	4,112.2

(a)Weighted-average rate as of September 30, 2023 and December 31, 2022, respectively.

(b)Amount of securitized debt for receivables as accounted for under the “Transfers and Servicing” accounting guidance.

Credit Facilities

For a discussion of credit facilities, see “Letters of Credit” section of Note 5.

Securitized Accounts Receivables – AEP Credit (Applies to AEP)

AEP Credit has a receivables securitization agreement with bank conduits. Under the securitization agreement, AEP Credit receives financing from the bank conduits for the interest in the receivables AEP Credit acquires from affiliated utility subsidiaries. These securitized transactions allow AEP Credit to repay its outstanding debt obligations, continue to purchase the operating companies’ receivables and accelerate AEP Credit’s cash collections.

AEP Credit’s receivables securitization agreement provides a commitment of $900 million from bank conduits to purchase receivables. The agreement was amended in August 2023 to increase the commitment from $750 million and expires in September 2025. As of September 30, 2023, the affiliated utility subsidiaries were in compliance with all requirements under the agreement.

187

Accounts receivable information for AEP Credit was as follows:

	Three Months Ended September 30,						Nine Months Ended September 30,
	2023			2022			2023			2022
	(dollars in millions)
Effective Interest Rates on Securitization of Accounts Receivable	5.55		%	2.25		%	5.23		%	1.16		%
Net Uncollectible Accounts Receivable Written-Off	$	8.8		$	9.5		$	22.9		$	23.1

	September 30, 2023		December 31, 2022
	(in millions)
Accounts Receivable Retained Interest and Pledged as Collateral Less Uncollectible Accounts	$	1,257.0	$	1,167.7
Short-term – Securitized Debt of Receivables	900.0		750.0
Delinquent Securitized Accounts Receivable	59.5		44.2
Bad Debt Reserves Related to Securitization	42.2		39.7
Unbilled Receivables Related to Securitization	301.8		360.9

AEP Credit’s delinquent customer accounts receivable represent accounts greater than 30 days past due.

Securitized Accounts Receivables – AEP Credit (Applies to all Registrant Subsidiaries except AEP Texas and AEPTCo)

Under this sale of receivables arrangement, the Registrant Subsidiaries sell, without recourse, certain of their customer accounts receivable and accrued unbilled revenue balances to AEP Credit and are charged a fee based on AEP Credit’s financing costs, administrative costs and uncollectible accounts experience for each Registrant Subsidiary’s receivables. APCo does not have regulatory authority to sell its West Virginia accounts receivable. KPCo ceased selling accounts receivable to AEP Credit in the first quarter of 2022, based on the expected sale to Liberty. As a result, in the first quarter of 2022, KPCo recorded an allowance for uncollectible accounts on its balance sheet for those receivables no longer sold to AEP Credit. In the third quarter of 2023, KPCo resumed selling accounts receivable to AEP Credit, due to the termination of the sale to Liberty, and the balance in KPCo’s allowance for uncollectible accounts was transferred to AEP Credit. The costs of customer accounts receivable sold are reported in Other Operation expense on the Registrant Subsidiaries’ statements of income. The Registrant Subsidiaries manage and service their customer accounts receivable, which are sold to AEP Credit. AEP Credit securitizes the eligible receivables for the operating companies and retains the remainder.

The amount of accounts receivable and accrued unbilled revenues under the sale of receivables agreements were:

Company	September 30, 2023		December 31, 2022
	(in millions)
APCo	$	170.5	$	194.4
I&M	176.2		166.9
OPCo	479.3		478.6
PSO	211.5		155.5
SWEPCo	210.2		194.0

The fees paid to AEP Credit for customer accounts receivable sold were:

	Three Months Ended September 30,				Nine Months Ended September 30,
Company	2023		2022		2023		2022
	(in millions)
APCo	$	4.1	$	2.8	$	13.3	$	5.6
I&M	4.4		2.8		12.2		6.5
OPCo	7.4		7.3		22.3		22.2
PSO	4.6		2.4		11.3		4.6
SWEPCo	5.2		3.2		13.9		6.0

188

The proceeds on the sale of receivables to AEP Credit were:

	Three Months Ended September 30,				Nine Months Ended September 30,
Company	2023		2022		2023		2022
	(in millions)
APCo	$	451.6	$	360.4	$	1,372.7	$	1,114.9
I&M	553.3		558.5		1,575.9		1,574.3
OPCo	850.3		874.1		2,518.6		2,284.0
PSO	633.8		588.5		1,510.3		1,380.4
SWEPCo	558.4		593.6		1,456.5		1,425.3

189

13. VARIABLE INTEREST ENTITIES

The disclosures in this note apply to AEP unless indicated otherwise.

The accounting guidance for “Variable Interest Entities” is a consolidation model that considers if a company has a variable interest in a VIE.  A VIE is a legal entity that possesses any of the following conditions: the entity’s equity at risk is not sufficient to permit the legal entity to finance its activities without additional subordinated financial support, equity owners are unable to direct the activities that most significantly impact the legal entity’s economic performance (or they possess disproportionate voting rights in relation to the economic interest in the legal entity), or the equity owners lack the obligation to absorb the legal entity’s expected losses or the right to receive the legal entity’s expected residual returns. Entities are required to consolidate a VIE when it is determined that they have a controlling financial interest in a VIE and therefore, are the primary beneficiary of that VIE, as defined by the accounting guidance for “Variable Interest Entities.” In determining whether AEP is the primary beneficiary of a VIE, management considers whether AEP has the power to direct the most significant activities of the VIE and is obligated to absorb losses or receive the expected residual returns that are significant to the VIE.

AEP holds ownership interests in businesses with varying ownership structures. AEP has not provided material financial or other support that was not previously contractually required to any of its consolidated VIEs. If an entity is determined not to be a VIE, or if the entity is determined to be a VIE and AEP is not deemed to be the primary beneficiary, the entity is accounted for under the equity method of accounting.

Consolidated Variable Interests Entities

The Annual Report on Form 10-K for the year ended December 31, 2022 includes a detailed discussion of the Registrants’ consolidated VIEs.

The balances below represent the assets and liabilities of consolidated VIEs. These balances include intercompany transactions that are eliminated upon consolidation.

American Electric Power Company, Inc. and Subsidiary Companies
Variable Interest Entities
September 30, 2023
	Registrant Subsidiaries
	SWEPCo Sabine		I&M DCC Fuel		AEP Texas Transition Funding			AEP Texas Restoration Funding			APCo Appalachian Consumer Rate Relief Funding
	(in millions)
ASSETS
Current Assets	$	4.8	$	59.9	$	49.4		$	20.9		$	4.7
Net Property, Plant and Equipment	—		104.1		—			—			—
Other Noncurrent Assets	128.1		51.8		90.5		(a)	151.4		(b)	145.3		(c)
Total Assets	$	132.9	$	215.8	$	139.9		$	172.3		$	150.0
LIABILITIES AND EQUITY
Current Liabilities	$	21.0	$	59.8	$	75.3		$	36.0		$	28.5
Noncurrent Liabilities	110.6		156.0		60.3			135.1			119.6
Equity	1.3		—		4.3			1.2			1.9
Total Liabilities and Equity	$	132.9	$	215.8	$	139.9		$	172.3		$	150.0

(a)Includes an intercompany item eliminated in consolidation of $10 million.

(b)Includes an intercompany item eliminated in consolidation of $6 million.

(c)Includes an intercompany item eliminated in consolidation of $2 million.

190

American Electric Power Company, Inc. and Subsidiary Companies
Variable Interest Entities
September 30, 2023
	Other Consolidated VIEs
	AEP Credit		Protected Cell of EIS		Transource Energy
	(in millions)
ASSETS
Current Assets	$	1,259.0	$	202.9	$	32.8
Net Property, Plant and Equipment	—		—		499.8
Other Noncurrent Assets	9.6		0.7		4.0
Total Assets	$	1,268.6	$	203.6	$	536.6
LIABILITIES AND EQUITY
Current Liabilities	$	1,201.3	$	54.1	$	21.3
Noncurrent Liabilities	0.9		84.7		229.4
Equity	66.4		64.8		285.9
Total Liabilities and Equity	$	1,268.6	$	203.6	$	536.6

As of September 30, 2023, Apple Blossom, Black Oak, Santa Rita East and Dry Lake are no longer consolidated VIEs due to the sale of the Competitive Contracted Renewables Portfolio. See the “Disposition of the Competitive Contracted Renewables Portfolio” section of Note 6 for additional information.

American Electric Power Company, Inc. and Subsidiary Companies
Variable Interest Entities
December 31, 2022
	Registrant Subsidiaries
	SWEPCo Sabine		I&M DCC Fuel		AEP Texas Transition Funding			AEP Texas Restoration Funding			APCo Appalachian Consumer Rate Relief Funding
	(in millions)
ASSETS
Current Assets	$	108.3	$	90.2	$	27.0		$	21.1		$	13.5
Net Property, Plant and Equipment	7.2		179.1		—			—			—
Other Noncurrent Assets	130.0		94.0		140.9		(a)	168.8		(b)	164.6		(c)
Total Assets	$	245.5	$	363.3	$	167.9		$	189.9		$	178.1
LIABILITIES AND EQUITY
Current Liabilities	$	25.4	$	90.0	$	73.2		$	31.3		$	29.3
Noncurrent Liabilities	219.4		273.3		90.4			157.4			146.9
Equity	0.7		—		4.3			1.2			1.9
Total Liabilities and Equity	$	245.5	$	363.3	$	167.9		$	189.9		$	178.1

(a)Includes an intercompany item eliminated in consolidation of $16 million.

(b)Includes an intercompany item eliminated in consolidation of $7 million.

(c)Includes an intercompany item eliminated in consolidation of $2 million.

191

American Electric Power Company, Inc. and Subsidiary Companies
Variable Interest Entities
December 31, 2022
	Other Consolidated VIEs
	AEP Credit		Protected Cell of EIS		Transource Energy		Apple Blossom and Black Oak		Santa Rita East		Dry Lake
	(in millions)
ASSETS
Current Assets	$	1,181.0	$	194.5	$	23.5	$	8.3	$	21.3	$	4.0
Net Property, Plant and Equipment	—		—		482.3		216.5		421.6		142.6
Other Noncurrent Assets	9.0		0.3		2.7		13.6		0.1		0.3
Total Assets	$	1,190.0	$	194.8	$	508.5	$	238.4	$	443.0	$	146.9
LIABILITIES AND EQUITY
Current Liabilities	$	1,087.8	$	46.4	$	22.8	$	4.5	$	9.6	$	1.0
Noncurrent Liabilities	0.9		79.1		218.6		5.4		7.3		0.7
Equity	101.3		69.3		267.1		228.5		426.1		145.2
Total Liabilities and Equity	$	1,190.0	$	194.8	$	508.5	$	238.4	$	443.0	$	146.9

Significant Variable Interests in Non-Consolidated VIEs and Significant Equity Method Investments

The Annual Report on Form 10-K for the year ended December 31, 2022 includes a detailed discussion of significant variable interests in non-consolidated VIEs and other significant equity method investments. As of September 30, 2023, AEP no longer owns a significant equity method investment in four joint ventures through AEP Wind Holdings, LLC due to the sale of the Competitive Contracted Renewables Portfolio. See the “Disposition of the Competitive Contracted Renewables Portfolio” section of Note 6 for additional information.

192

14. PROPERTY, PLANT AND EQUIPMENT

The disclosure in this note applies to AEP and SWEPCo.

Asset Retirement Obligations

The Registrants record ARO in accordance with the accounting guidance for “Asset Retirement and Environmental Obligations” for legal obligations for asbestos removal and for the retirement of certain ash disposal facilities, wind farms, solar farms and certain coal mining facilities. The table below summarizes significant changes to the Registrants ARO recorded in 2023 and should be read in conjunction with the Property, Plant and Equipment note within the 2022 Annual Report.

The following is a reconciliation of the aggregate carrying amounts of ARO for AEP and SWEPCo:

Company	ARO as of December 31, 2022		Accretion Expense		Liabilities Incurred		Liabilities Settled		Revisions in Cash Flow Estimates		ARO as of September 30, 2023
	(in millions)
AEP (a)(b)(c)(d)(e)(f)	$	2,944.9	$	86.0	$	12.9	$	(98.1)	$	13.8	$	2,959.5
SWEPCo (a)(c)(d)(e)	282.2		10.0		7.1		(37.9)		0.4		261.8

(a)Includes ARO related to ash disposal facilities.

(b)Includes ARO related to nuclear decommissioning costs for the Cook Plant of $2.05 billion and $2 billion as of September 30, 2023 and December 31, 2022, respectively.

(c)Includes ARO related to Sabine and DHLC.

(d)Includes ARO related to asbestos removal.

(e)In 2023, SWEPCo settled $35 million of costs related to closure/reclamation work performed due to the recent retirements of the Pirkey Plant and Dolet Hills Power Station. See “Coal-Fired Generation Plants” section of Note 4 for additional information.

(f)In August 2023, AEP completed the sale of its competitive contracted renewables portfolio to a nonaffiliated party and settled ARO liabilities of $31 million. See “Disposition of the Competitive Contracted Renewables Portfolio” section of Note 6 for additional information.

193

15. REVENUE FROM CONTRACTS WITH CUSTOMERS

The disclosures in this note apply to all Registrants, unless indicated otherwise.

Disaggregated Revenues from Contracts with Customers

The tables below represent AEP’s reportable segment revenues from contracts with customers, net of respective provisions for refund, by type of revenue:

	Three Months Ended September 30, 2023
	Vertically Integrated Utilities		Transmission and Distribution Utilities		AEP Transmission Holdco		Generation & Marketing		Corporate and Other		Reconciling Adjustments		AEP Consolidated
	(in millions)
Retail Revenues:
Residential Revenues	$	1,326.7	$	772.5	$	—	$	—	$	—	$	—	$	2,099.2
Commercial Revenues	753.3		387.7		—		—		—		—		1,141.0
Industrial Revenues	699.9		138.9		—		—		—		(0.3)		838.5
Other Retail Revenues	66.6		13.0		—		—		—		—		79.6
Total Retail Revenues	2,846.5		1,312.1		—		—		—		(0.3)		4,158.3
Wholesale and Competitive Retail Revenues:
Generation Revenues	174.3		—		—		31.8		—		(0.3)		205.8
Transmission Revenues (a)	120.6		176.0		466.1		—		—		(425.1)		337.6
Renewable Generation Revenues (b)	—		—		—		19.8		—		(2.5)		17.3
Retail, Trading and Marketing Revenues (c)	—		—		—		510.8		0.8		(36.7)		474.9
Total Wholesale and Competitive Retail Revenues	294.9		176.0		466.1		562.4		0.8		(464.6)		1,035.6
Other Revenues from Contracts with Customers (d)	61.3		58.2		4.8		0.9		55.6		(48.5)		132.3
Total Revenues from Contracts with Customers	3,202.7		1,546.3		470.9		563.3		56.4		(513.4)		5,326.2
Other Revenues:
Alternative Revenue Programs (b) (e)	0.5		(5.0)		5.8		—		—		5.7		7.0
Other Revenues (b) (f)	2.2		2.8		—		3.4		0.8		(0.7)		8.5
Total Other Revenues	2.7		(2.2)		5.8		3.4		0.8		5.0		15.5
Total Revenues	$	3,205.4	$	1,544.1	$	476.7	$	566.7	$	57.2	$	(508.4)	$	5,341.7

(a)Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for AEP Transmission Holdco was $366 million. The remaining affiliated amounts were immaterial.

(b)Amounts include affiliated and nonaffiliated revenues.

(c)Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for Generation & Marketing was $37 million. The remaining affiliated amounts were immaterial.

(d)Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for Corporate and Other was $32 million. The remaining affiliated amounts were immaterial.

(e)Alternative revenue programs in certain jurisdictions include regulatory mechanisms that periodically adjust for over/under collection of related revenues.

(f)Generation & Marketing includes economic hedge activity.

194

	Three Months Ended September 30, 2022
	Vertically Integrated Utilities		Transmission and Distribution Utilities		AEP Transmission Holdco		Generation & Marketing		Corporate and Other		Reconciling Adjustments		AEP Consolidated
	(in millions)
Retail Revenues:
Residential Revenues	$	1,298.0	$	721.9	$	—	$	—	$	—	$	—	$	2,019.9
Commercial Revenues	725.1		373.0		—		—		—		—		1,098.1
Industrial Revenues	658.5		191.5		—		—		—		(0.3)		849.7
Other Retail Revenues	54.3		15.0		—		—		—		—		69.3
Total Retail Revenues	2,735.9		1,301.4		—		—		—		(0.3)		4,037.0
Wholesale and Competitive Retail Revenues:
Generation Revenues	299.3		—		—		83.7		—		(0.2)		382.8
Transmission Revenues (a)	120.3		162.3		424.9		—		—		(392.7)		314.8
Renewable Generation Revenues (b)	—		—		—		44.3		—		(2.5)		41.8
Retail, Trading and Marketing Revenues	—		—		—		482.9		2.2		0.2		485.3
Total Wholesale and Competitive Retail Revenues	419.6		162.3		424.9		610.9		2.2		(395.2)		1,224.7
Other Revenues from Contracts with Customers (c)	69.7		74.5		(0.3)		1.7		24.3		(31.9)		138.0
Total Revenues from Contracts with Customers	3,225.2		1,538.2		424.6		612.6		26.5		(427.4)		5,399.7
Other Revenues:
Alternative Revenue Programs (b) (d)	0.9		(13.5)		6.3		—		—		4.4		(1.9)
Other Revenues (b) (e)	0.2		5.5		—		122.8		1.8		(2.0)		128.3
Total Other Revenues	1.1		(8.0)		6.3		122.8		1.8		2.4		126.4
Total Revenues	$	3,226.3	$	1,530.2	$	430.9	$	735.4	$	28.3	$	(425.0)	$	5,526.1

(a)Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for AEP Transmission Holdco was $342 million. The remaining affiliated amounts were immaterial.

(b)Amounts include affiliated and nonaffiliated revenues.

(c)Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for Corporate and Other was $18 million. The remaining affiliated amounts were immaterial.

(d)Alternative revenue programs in certain jurisdictions include regulatory mechanisms that periodically adjust for over/under collection of related revenues.

(e)Generation & Marketing includes economic hedge activity.

195

	Three Months Ended September 30, 2023
	AEP Texas		AEPTCo		APCo		I&M		OPCo		PSO		SWEPCo
	(in millions)
Retail Revenues:
Residential Revenues	$	236.2	$	—	$	397.1	$	230.7	$	536.3	$	310.5	$	286.5
Commercial Revenues	112.4		—		181.3		159.2		275.3		171.9		174.9
Industrial Revenues	35.4		—		197.1		159.1		103.6		114.1		105.5
Other Retail Revenues	9.2		—		26.8		1.3		3.8		33.8		2.4
Total Retail Revenues	393.2		—		802.3		550.3		919.0		630.3		569.3
Wholesale Revenues:
Generation Revenues (a)	—		—		79.4		90.2		—		(4.9)		36.8
Transmission Revenues (b)	154.6		454.7		45.5		10.4		21.4		10.8		42.4
Total Wholesale Revenues	154.6		454.7		124.9		100.6		21.4		5.9		79.2
Other Revenues from Contracts with Customers (c)	8.8		5.0		35.2		26.2		49.2		5.4		6.0
Total Revenues from Contracts with Customers	556.6		459.7		962.4		677.1		989.6		641.6		654.5
Other Revenues:
Alternative Revenue Programs (d) (e)	(2.0)		3.0		(0.7)		(2.9)		(3.1)		2.6		0.3
Other Revenues (e)	—		—		0.1		2.1		3.0		—		—
Total Other Revenues	(2.0)		3.0		(0.6)		(0.8)		(0.1)		2.6		0.3
Total Revenues	$	554.6	$	462.7	$	961.8	$	676.3	$	989.5	$	644.2	$	654.8

(a)Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for APCo was $36 million primarily related to the PPA with KGPCo.

(b)Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for AEPTCo was $363 million, APCo was $22 million and SWEPCo was $17 million. The remaining affiliated amounts were immaterial.

(c)Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for I&M was $18 million primarily related to barging, urea transloading and other transportation services. The remaining affiliated amounts were immaterial.

(d)Alternative revenue programs in certain jurisdictions include regulatory mechanisms that periodically adjust for over/under collection of related revenues.

(e)Amounts include affiliated and nonaffiliated revenues.

196

	Three Months Ended September 30, 2022
	AEP Texas		AEPTCo		APCo		I&M		OPCo		PSO		SWEPCo
	(in millions)
Retail Revenues:
Residential Revenues	$	204.0	$	—	$	360.5	$	238.6	$	517.9	$	299.6	$	285.5
Commercial Revenues	107.1		—		161.1		154.3		266.1		153.4		182.3
Industrial Revenues	35.4		—		163.3		155.6		156.1		98.9		108.3
Other Retail Revenues	11.5		—		20.6		1.2		3.5		30.1		0.6
Total Retail Revenues	358.0		—		705.5		549.7		943.6		582.0		576.7
Wholesale Revenues:
Generation Revenues (a)	—		—		107.9		126.3		—		9.4		87.6
Transmission Revenues (b)	140.8		411.7		41.5		8.8		21.5		10.2		42.3
Total Wholesale Revenues	140.8		411.7		149.4		135.1		21.5		19.6		129.9
Other Revenues from Contracts with Customers (c)	9.5		(0.3)		33.7		30.6		64.8		6.4		7.6
Total Revenues from Contracts with Customers	508.3		411.4		888.6		715.4		1,029.9		608.0		714.2
Other Revenues:
Alternative Revenue Programs (d) (e)	0.6		7.1		—		—		(14.1)		0.2		3.3
Other Revenues (e)	—		—		0.3		—		5.5		—		—
Total Other Revenues	0.6		7.1		0.3		—		(8.6)		0.2		3.3
Total Revenues	$	508.9	$	418.5	$	888.9	$	715.4	$	1,021.3	$	608.2	$	717.5

(a)Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for APCo was $44 million primarily related to the PPA with KGPCo.

(b)Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for AEPTCo was $339 million. The remaining affiliated amounts were immaterial.

(c)Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for I&M was $15 million primarily related to barging, urea transloading and other transportation services. The remaining affiliated amounts were immaterial.

(d)Alternative revenue programs in certain jurisdictions include regulatory mechanisms that periodically adjust for over/under collection of related revenues.

(e)Amounts include affiliated and nonaffiliated revenues.

197

	Nine Months Ended September 30, 2023
	Vertically Integrated Utilities		Transmission and Distribution Utilities		AEP Transmission Holdco		Generation & Marketing		Corporate and Other		Reconciling Adjustments		AEP Consolidated
	(in millions)
Retail Revenues:
Residential Revenues	$	3,459.1	$	2,003.4	$	—	$	—	$	—	$	—	$	5,462.5
Commercial Revenues	2,029.4		1,121.9		—		—		—		—		3,151.3
Industrial Revenues (a)	2,069.1		503.9		—		—		—		(0.6)		2,572.4
Other Retail Revenues	182.3		37.4		—		—		—		—		219.7
Total Retail Revenues	7,739.9		3,666.6		—		—		—		(0.6)		11,405.9
Wholesale and Competitive Retail Revenues:
Generation Revenues	498.5		—		—		83.8		—		(0.2)		582.1
Transmission Revenues (b)	348.8		524.3		1,372.0		—		—		(1,229.7)		1,015.4
Renewable Generation Revenues (a)	—		—		—		74.2		—		(5.7)		68.5
Retail, Trading and Marketing Revenues (c)	—		—		—		1,332.2		1.7		(46.7)		1,287.2
Total Wholesale and Competitive Retail Revenues	847.3		524.3		1,372.0		1,490.2		1.7		(1,282.3)		2,953.2
Other Revenues from Contracts with Customers (d)	155.8		157.1		12.7		7.7		113.6		(132.1)		314.8
Total Revenues from Contracts with Customers	8,743.0		4,348.0		1,384.7		1,497.9		115.3		(1,415.0)		14,673.9
Other Revenues:
Alternative Revenue Programs (a) (e)	(7.5)		(19.5)		6.1		—		—		2.3		(18.6)
Other Revenues (a) (f)	2.2		20.0		—		(272.8)		4.0		(3.6)		(250.2)
Total Other Revenues	(5.3)		0.5		6.1		(272.8)		4.0		(1.3)		(268.8)
Total Revenues	$	8,737.7	$	4,348.5	$	1,390.8	$	1,225.1	$	119.3	$	(1,416.3)	$	14,405.1

(a)Amounts include affiliated and nonaffiliated revenues.

(b)Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for AEP Transmission Holdco was $1.1 billion. The affiliated revenue for Vertically Integrated Utilities was $125 million. The remaining affiliated amounts were immaterial.

(c)Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for Generation & Marketing was $47 million. The remaining affiliated amounts were immaterial.

(d)Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for Corporate and Other was $87 million. The remaining affiliated amounts were immaterial.

(e)Alternative revenue programs in certain jurisdictions include regulatory mechanisms that periodically adjust for over/under collection of related revenues.

(f)Generation & Marketing includes economic hedge activity.

198

	Nine Months Ended September 30, 2022
	Vertically Integrated Utilities		Transmission and Distribution Utilities		AEP Transmission Holdco		Generation & Marketing		Corporate and Other		Reconciling Adjustments		AEP Consolidated
	(in millions)
Retail Revenues:
Residential Revenues	$	3,428.1	$	1,884.1	$	—	$	—	$	—	$	—	$	5,312.2
Commercial Revenues	1,922.8		994.4		—		—		—		—		2,917.2
Industrial Revenues (a)	1,863.3		487.3		—		—		—		(0.7)		2,349.9
Other Retail Revenues	154.6		39.4		—		—		—		—		194.0
Total Retail Revenues	7,368.8		3,405.2		—		—		—		(0.7)		10,773.3
Wholesale and Competitive Retail Revenues:
Generation Revenues (a)	674.8		—		—		207.0		—		(0.1)		881.7
Transmission Revenues (b)	334.4		482.1		1,261.0		—		—		(1,086.5)		991.0
Renewable Generation Revenues (a)	—		—		—		104.9		—		(6.2)		98.7
Retail, Trading and Marketing Revenues (c)	—		—		—		1,280.0		6.7		(11.1)		1,275.6
Total Wholesale and Competitive Retail Revenues	1,009.2		482.1		1,261.0		1,591.9		6.7		(1,103.9)		3,247.0
Other Revenues from Contracts with Customers (d)	180.5		194.2		(0.3)		11.9		59.1		(71.6)		373.8
Total Revenues from Contracts with Customers	8,558.5		4,081.5		1,260.7		1,603.8		65.8		(1,176.2)		14,394.1
Other Revenues:
Alternative Revenue Programs (a) (e)	3.4		(21.5)		(39.6)		—		—		(7.4)		(65.1)
Other Revenues (a) (f)	0.3		18.6		—		410.5		6.9		(6.9)		429.4
Total Other Revenues	3.7		(2.9)		(39.6)		410.5		6.9		(14.3)		364.3
Total Revenues	$	8,562.2	$	4,078.6	$	1,221.1	$	2,014.3	$	72.7	$	(1,190.5)	$	14,758.4

(a)Amounts include affiliated and nonaffiliated revenues.

(b)Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for AEP Transmission Holdco was $1 billion. The affiliated revenue for Vertically Integrated Utilities was $120 million. The remaining affiliated amounts were immaterial.

(c)Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for Generation & Marketing was $11 million. The remaining affiliated amounts were immaterial.

(d)Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for Corporate and Other was $36 million. The remaining affiliated amounts were immaterial.

(e)Alternative revenue programs in certain jurisdictions include regulatory mechanisms that periodically adjust for over/under collection of related revenues.

(f)Generation & Marketing includes economic hedge activity.

199

	Nine Months Ended September 30, 2023
	AEP Texas		AEPTCo		APCo		I&M		OPCo		PSO		SWEPCo
	(in millions)
Retail Revenues:
Residential Revenues	$	511.8	$	—	$	1,192.4	$	655.5	$	1,491.6	$	667.9	$	647.5
Commercial Revenues	310.3		—		516.2		439.5		811.6		412.7		472.2
Industrial Revenues (a)	109.9		—		575.4		467.6		394.0		320.2		320.3
Other Retail Revenues	26.2		—		78.2		3.8		11.2		86.3		7.6
Total Retail Revenues	958.2		—		2,362.2		1,566.4		2,708.4		1,487.1		1,447.6
Wholesale Revenues:
Generation Revenues (b)	—		—		223.8		257.7		—		0.3		120.3
Transmission Revenues (c)	464.0		1,338.1		130.8		28.1		60.3		32.0		123.6
Total Wholesale Revenues	464.0		1,338.1		354.6		285.8		60.3		32.3		243.9
Other Revenues from Contracts with Customers (d)	29.2		12.8		60.0		92.6		127.9		14.9		20.9
Total Revenues from Contracts with Customers	1,451.4		1,350.9		2,776.8		1,944.8		2,896.6		1,534.3		1,712.4
Other Revenues:
Alternative Revenue Program (a) (e)	(6.1)		(1.7)		(0.9)		(8.4)		(13.5)		1.6		(3.9)
Other Revenues (a)	—		—		0.1		2.1		20.1		—		—
Total Other Revenues	(6.1)		(1.7)		(0.8)		(6.3)		6.6		1.6		(3.9)
Total Revenues	$	1,445.3	$	1,349.2	$	2,776.0	$	1,938.5	$	2,903.2	$	1,535.9	$	1,708.5

(a)Amounts include affiliated and nonaffiliated revenues.

(b)Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for APCo was $121 million primarily relating to the PPA with KGPCo. The remaining affiliated amounts were immaterial.

(c)Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for AEPTCo was $1.1 billion, APCo was $64 million and SWEPCo was $43 million. The remaining affiliated amounts were immaterial.

(d)Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for I&M was $52 million primarily relating to barging, urea transloading and other transportation services. The remaining affiliated amounts were immaterial.

(e)Alternative revenue programs in certain jurisdictions include regulatory mechanisms that periodically adjust for over/under collection of related revenues.

200

	Nine Months Ended September 30, 2022
	AEP Texas		AEPTCo		APCo		I&M		OPCo		PSO		SWEPCo
	(in millions)
Retail Revenues:
Residential Revenues	$	520.8	$	—	$	1,131.7	$	665.6	$	1,363.3	$	650.7	$	650.0
Commercial Revenues	312.6		—		467.6		419.5		681.9		372.1		458.8
Industrial Revenues (a)	102.6		—		479.0		452.1		384.8		270.0		290.1
Other Retail Revenues	29.2		—		61.4		3.7		10.2		77.1		7.4
Total Retail Revenues	965.2		—		2,139.7		1,540.9		2,440.2		1,369.9		1,406.3
Wholesale Revenues:
Generation Revenues (b)	—		—		227.6		310.9		—		19.2		206.2
Transmission Revenues (c)	417.7		1,218.1		123.4		26.3		64.4		28.9		116.8
Total Wholesale Revenues	417.7		1,218.1		351.0		337.2		64.4		48.1		323.0
Other Revenues from Contracts with Customers (d)	24.4		(0.4)		78.6		86.3		169.6		21.4		18.9
Total Revenues from Contracts with Customers	1,407.3		1,217.7		2,569.3		1,964.4		2,674.2		1,439.4		1,748.2
Other Revenues:
Alternative Revenue Program (a) (e)	(2.9)		(34.4)		0.1		7.3		(18.6)		(0.7)		0.7
Other Revenues (a)	—		—		0.4		(0.1)		18.6		—		—
Total Other Revenues	(2.9)		(34.4)		0.5		7.2		—		(0.7)		0.7
Total Revenues	$	1,404.4	$	1,183.3	$	2,569.8	$	1,971.6	$	2,674.2	$	1,438.7	$	1,748.9

(a)Amounts include affiliated and nonaffiliated revenues.

(b)Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for APCo was $122 million primarily relating to the PPA with KGPCo.

(c)Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for AEPTCo was $992 million. The remaining affiliated amounts were immaterial.

(d)Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for I&M was $44 million primarily relating to barging, urea transloading and other transportation services. The remaining affiliated amounts were immaterial.

(e)Alternative revenue programs in certain jurisdictions include regulatory mechanisms that periodically adjust for over/under collection of related revenues.

Fixed Performance Obligations (Applies to AEP, APCo and I&M)

The following table represents the Registrants’ remaining fixed performance obligations satisfied over time as of September 30, 2023. Fixed performance obligations primarily include electricity sales for fixed amounts of energy and stand ready services into PJM’s RPM market. The Registrants elected to apply the exemption to not disclose the value of unsatisfied performance obligations for contracts with an original expected term of one year or less. Due to the annual establishment of revenue requirements, transmission revenues are excluded from the table below. The Registrant Subsidiaries amounts shown in the table below include affiliated and nonaffiliated revenues.

Company	2023		2024-2025		2026-2027		After 2027		Total
	(in millions)
AEP	$	22.6	$	166.2	$	141.2	$	35.0	$	365.0
APCo	4.0		32.2		26.6		11.6		74.4
I&M	1.1		8.8		8.8		4.5		23.2

201

Contract Assets and Liabilities

Contract assets are recognized when the Registrants have a right to consideration that is conditional upon the occurrence of an event other than the passage of time, such as future performance under a contract. The Registrants did not have material contract assets as of September 30, 2023 and December 31, 2022.

When the Registrants receive consideration, or such consideration is unconditionally due from a customer prior to transferring goods or services to the customer under the terms of a sales contract, they recognize a contract liability on the balance sheets in the amount of that consideration. Revenue for such consideration is subsequently recognized in the period or periods in which the remaining performance obligations in the contract are satisfied. The Registrants’ contract liabilities typically arise from services provided under joint use agreements for utility poles. The Registrants did not have material contract liabilities as of September 30, 2023 and December 31, 2022.

Accounts Receivable from Contracts with Customers

Accounts receivable from contracts with customers are presented on the Registrant Subsidiaries’ balance sheets within the Accounts Receivable - Customers line item. The Registrant Subsidiaries’ balances for receivables from contracts that are not recognized in accordance with the accounting guidance for “Revenue from Contracts with Customers” included in Accounts Receivable - Customers were not material as of September 30, 2023 and December 31, 2022. See “Securitized Accounts Receivable - AEP Credit” section of Note 12 for additional information.

The following table represents the amount of affiliated accounts receivable from contracts with customers included in Accounts Receivable - Affiliated Companies on the Registrant Subsidiaries’ balance sheets:

Company	September 30, 2023		December 31, 2022
	(in millions)
AEP Texas	$	0.1	$	0.1
AEPTCo	122.5		113.8
APCo	69.3		64.5
I&M	50.1		75.3
OPCo	67.3		49.9
PSO	13.8		18.8
SWEPCo	23.7		19.1

202

CONTROLS AND PROCEDURES

During the third quarter of 2023, management, including the principal executive officer and principal financial officer of each of the Registrants, evaluated the Registrants’ disclosure controls and procedures. Disclosure controls and procedures are defined as controls and other procedures of the Registrants that are designed to ensure that information required to be disclosed by the Registrants in the reports that they file or submit under the Exchange Act are recorded, processed, summarized and reported within the time periods specified in the SEC’s rules and forms. Disclosure controls and procedures include, without limitation, controls and procedures designed to ensure that information required to be disclosed by the Registrants in the reports that they file or submit under the Exchange Act is accumulated and communicated to the Registrants’ management, including the principal executive and principal financial officers, or persons performing similar functions, as appropriate to allow timely decisions regarding required disclosure. As of September 30, 2023, these officers concluded that the disclosure controls and procedures in place are effective and provide reasonable assurance that the disclosure controls and procedures accomplished their objectives.

There was no change in the Registrants’ internal control over financial reporting (as such term is defined in Rule 13a-15(f) and 15d-15(f) under the Exchange Act) during the third quarter of 2023 that materially affected, or is reasonably likely to materially affect, the Registrants’ internal control over financial reporting.

203

PART II.  OTHER INFORMATION

Item 1.  Legal Proceedings

For a discussion of material legal proceedings, see “Commitments, Guarantees and Contingencies,” of Note 5 incorporated herein by reference.

Item 1A.  Risk Factors

The Annual Report on Form 10-K for the year ended December 31, 2022 includes a detailed discussion of risk factors. As of September 30, 2023, the risk factors appearing in AEP’s 2022 Annual Report are supplemented and updated as follows:

Our financial position may be adversely impacted if announced dispositions do not occur as planned or if assets under strategic evaluation lose value. (Applies to AEP)

In October 2022, AEP initiated a strategic evaluation for its ownership in AEP Energy. In April 2023, management completed the strategic evaluation of AEP Energy and initiated a sale process. In April 2023, AEP also made a decision to include AEP Onsite Partners in the sale process. AEP Onsite Partners also owns a 50% interest in NM Renewable Development, LLC, (NMRD). Separate from the remainder of AEP Onsite Partners, AEP and the joint owner have agreed to initiate a joint sales process for their respective interests in NMRD.

In July 2023, AEP made a decision to initiate a sales process for its investment in Pioneer Transmission, LLC and Prairie Wind Transmission, LLC.

Any planned sale of assets and investments, including subsidiaries, may not occur for any number of reasons beyond our control, including regulatory approval on terms that are acceptable. Depending on the outcome of these potential sales, it could reduce future net income and impact financial condition.

Item 2.  Unregistered Sales of Equity Securities and Use of Proceeds

None

Item 3.  Defaults Upon Senior Securities

None

Item 4.  Mine Safety Disclosures

The Federal Mine Safety and Health Act of 1977 (Mine Act) imposes stringent health and safety standards on various mining operations. The Mine Act and its related regulations affect numerous aspects of mining operations, including training of mine personnel, mining procedures, equipment used in mine emergency procedures, mine plans and other matters. SWEPCo, through its ownership of DHLC, a wholly-owned lignite mining subsidiary of SWEPCo, is subject to the provisions of the Mine Act.

The Dodd-Frank Wall Street Reform and Consumer Protection Act (Dodd-Frank Act) requires companies that operate mines to include in their periodic reports filed with the SEC, certain mine safety information covered by the Mine Act. Exhibit 95 “Mine Safety Disclosure Exhibit” contains the notices of violation and proposed assessments received by DHLC under the Mine Act for the quarter ended September 30, 2023.

Item 5.  Other Information

During the three months ended September 30, 2023, none of the Company’s directors or officers (as defined in Rule 16a-1(f) of the Securities Exchange Act of 1934) adopted, terminated or modified a Rule 10b5-1 trading arrangement or non-Rule 10b5-1 trading arrangement (as such terms are defined in Item 408 of Regulation S-K of the Securities Act of 1933).

204

Item 6.  Exhibits

The documents designated with an (*) below have previously been filed on behalf of the Registrants shown and are incorporated herein by reference to the documents indicated and made a part hereof.

Exhibit Description Previously Filed as Exhibit to:

The exhibits designated with an (X) in the table below are being filed on behalf of the Registrants.

Exhibit	Description	AEP	AEP Texas	AEPTCo	APCo	I&M	OPCo	PSO	SWEPCo
10	Severance, Release of All Claims and Noncompetition Agreement between the Company and Ann P. Kelly.	X
31(a)	Certification of Chief Executive Officer Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002	X	X	X	X	X	X	X	X
31(b)	Certification of Chief Financial Officer Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002	X	X	X	X	X	X	X	X
32(a)	Certification of Chief Executive Officer Pursuant to Section 1350 of Chapter 63 of Title 18 of the United States Code	X	X	X	X	X	X	X	X
32(b)	Certification of Chief Financial Officer Pursuant to Section 1350 of Chapter 63 of Title 18 of the United States Code	X	X	X	X	X	X	X	X
95	Mine Safety Disclosures								X
101.INS	XBRL Instance Document	The instance document does not appear in the interactive data file because its XBRL tags are embedded within the inline XBRL document.
101.SCH	XBRL Taxonomy Extension Schema	X	X	X	X	X	X	X	X
101.CAL	XBRL Taxonomy Extension Calculation Linkbase	X	X	X	X	X	X	X	X
101.DEF	XBRL Taxonomy Extension Definition Linkbase	X	X	X	X	X	X	X	X
101.LAB	XBRL Taxonomy Extension Label Linkbase	X	X	X	X	X	X	X	X
101.PRE	XBRL Taxonomy Extension Presentation Linkbase	X	X	X	X	X	X	X	X
104	Cover Page Interactive Data File	Formatted as Inline XBRL and contained in Exhibit 101.

205

SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, each registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.  The signature for each undersigned company shall be deemed to relate only to matters having reference to such company and any subsidiaries thereof.

AMERICAN ELECTRIC POWER COMPANY, INC.

By: /s/ Kate Sturgess

Kate Sturgess

Controller and Chief Accounting Officer

AEP TEXAS INC.

AEP TRANSMISSION COMPANY, LLC

APPALACHIAN POWER COMPANY

INDIANA MICHIGAN POWER COMPANY

OHIO POWER COMPANY

PUBLIC SERVICE COMPANY OF OKLAHOMA

SOUTHWESTERN ELECTRIC POWER COMPANY

By: /s/ Kate Sturgess

Kate Sturgess

Controller and Chief Accounting Officer

Date:  November 2, 2023

206

EX-10

SEVERANCE, RELEASE OF ALL CLAIMS, AND NONCOMPETITION AGREEMENT

1.This Severance, Release of All Claims and Noncompetition Agreement ("Agreement") is entered into by and between Ann P. Kelly, hereinafter referred to, together with her heirs, executors, administrators, successors, assigns and personal representatives, as "Employee", and American Electric Power Service Corporation, hereinafter referred to, together with all its past, present and future affiliated, parent and/or subsidiary organizations and divisions, and all past, present and future officers, directors, members, employees and agents of each, in both their individual and representative capacities, as the "Company."

2.Severance Allowance. Provided the Employee timely executes, returns, and does not revoke this Agreement and continues to provide services to the company up to and including the Termination Date, the Company shall provide the following consideration:

(a)Employee (or Employee’s estate) a salary and bonus severance in the amount of $1,260,000 (the “Severance Amount”). The Company shall pay the Severance Amount to Employee according to the following payment schedule:

(i)As of the first regular payroll date of the Company that coincides with or immediately follows the date that is six months after Friday, September 29, 2023 (the “Termination Date”), a payment equal to 50% of the Severance Amount; and

(ii)The balance of such Severance Amount shall be paid in 13 equal bi-weekly installments as of such number of subsequent regular payroll dates of the Company.

Payment under this Section 2 shall be made by direct deposit. Each payment shall be subject to such deductions as required by law.

(b)Partial vesting shall apply to Employee’s outstanding Performance Share Awards and RSU Awards, as further described in the Summary of Benefits from Andrew R. Carlin to Employee, a copy of which is attached hereto as Exhibit A (the “Summary of Benefits”).

3.Consideration. Employee acknowledges that the benefits described in this Agreement are benefits to which she would not be entitled but for this Agreement.

4.Release and Waiver of Claims. In exchange for the foregoing benefits, subject to Section 11 of this Agreement (Protected Activity), Employee, on behalf of Employee and her heirs, executors, administrators, successors, assigns and personal representatives, hereby releases and forever discharges the Company and the Company’s long-term disability plans (including any trustees, custodians and administrators engaged in connection with the administration of claims or assets maintained in connection with any such plans) of and from any and all legal, equitable, and administrative claims and demands of every name, type, act and nature, arising out of or existing by reason of any known or unknown act or inaction whatsoever and occurring directly or indirectly as a result of or prior to execution of this Agreement. This release includes, but is not limited to, any claims, charges, complaints, grievances, causes of action (known or unknown), demands, injuries (whether personal, emotional or other), unfair labor practices, or suits arising, directly or indirectly, out of Employee's employment with and/or separation of

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AEP CONFIDENTIAL

employment from the Company, and includes, but is not limited to claims, charges, complaints, actions, grievances, demands or suits which may be, have, or might have been asserted, whether in contract or in tort, and whether under common law or under federal, state or local statute, regulation or ordinance. Claims, actions and demands released herein include but are not limited to those based on allegations of wrongful discharge, retaliation, personal injury and/or breach of contract; those arising under federal, state or local employment discrimination, fair employment practices, and/or wage and hour laws; and for West Virginia employees, those arising under the West Virginia Human Rights Act; those arising under Title VII of the Civil Rights Act of 1964, the Civil Rights Act of 1866, as amended, the Fair Labor Standards Act, the Age Discrimination in Employment Act of 1967 (“ADEA”), the Rehabilitation Act of 1973, the Americans With Disabilities Act (“ADA”) and Executive Order 11246, (all as amended); those arising under the Uniformed Services Employment and Re-employment Rights Act of 1994 (“USERRA”), the Worker Adjustment and Retraining Notification Act (“WARN”), the Labor Management Relations Act (“LMRA”), the National Labor Relations Act (“NLRA”), and the Family and Medical Leave Act (“FMLA”); and those arising under applicable securities laws. Also released are any claims and demands related to entitlement to long-term disability benefits under any Company long-term disability plan. Excluded from this release and waiver of claims are any pending or as yet unaccrued worker’s compensation/occupational disease claims, vested pension and savings plan (401k) benefits, participation in health and welfare benefits (medical, dental and vision) under the terms of such plans, vested balances and payments under non-qualified deferred compensation plans, and claims which cannot be waived by law. Also excluded from this release and waiver of claims are the relocation expenses associated with Employee’s 2023 move to Ohio, which the Company has agreed to pay to Employee irrespective of whether Employee executes this Agreement. These expenses include home sale reimbursement, home sale bonus, new home purchase closing cost reimbursement, up to 60 days of duplicate house expense reimbursement, and meals and mileage for her final move trip. To be reimbursed, Employee must submit a request with proper documentation in accordance with the Company’s relocation program and do so within 90 calendar days of the effective date of this Agreement or of the event triggering the reimbursement expense, whichever is later.

5.Agreement Not to Compete. Without American Electric Power Service Corporation’s prior written consent, Employee agrees not to, during the 12-month period following the Employee’s Termination Date (the “Restricted Period”), for any reason, directly or indirectly either as principal, agent, manager, employee, partner, shareholder, director, officer, consultant or otherwise, become engaged or involved, in a manner that relates to or is similar in nature to the specific duties performed by the Employee at any time during her employment with any the Company, in any business (other than as a less-than three percent (3%) equity owner of any corporation traded on any national, international or regional stock exchange or in the over-the- counter market) that directly competes with the Company in

(a)the business of the harnessing, production, transmission, distribution, marketing or sale of electricity; or the development or operation of transmission facilities or power generation facilities; or

(b)any other business in which the Company is engaged at the termination of the Employee's employment with the Company.

The provisions of this Section 5 shall be limited in scope and be effective only within one or more of the following geographical areas: (A) any state in the United States where the Company has at least U.S. $25 million in capital deployed as of the Employee’s Termination Date; or (B) any state or country with respect to which the Company conducted a business, which, or

Page 2 of 5

AEP CONFIDENTIAL

oversight of which, constituted any part of the Employee’s employment. The parties intend the above geographical areas to be completely severable and independent, and any invalidity or unenforceability of this Agreement with respect to any one area shall not render this Agreement unenforceable as applied to any one or more of the other areas. Nothing in this Section 5 shall be construed to prohibit the Employee being retained during the Restricted Period in a capacity as an attorney licensed to practice law, or to restrict the Employee from providing advice and counsel in such capacity, in any jurisdiction where such prohibition or restriction is contrary to law.

6.Cessation of Employment and (where applicable) LTD Benefits. If Employee has any claim of any benefit entitlement attributable to a disability of Employee, Employee further acknowledges and understands that, as a consequence of accepting the benefits referenced in this Agreement, and signing this Agreement, Employee’s employment with the Company is terminated, the payment (if applicable) of any long-term disability benefits will cease, any claim of entitlement to long-term disability benefits is released, and that any existing reduction of employee contributions toward the cost of medical, dental, life and any other coverages will also cease, subject to Employee’s rights to continuation of coverages pursuant to applicable law. In any event, Employee acknowledges that Employee shall no longer be entitled to any continued employment with the Company.

7.Resignation of Director, Officer and Manager Positions. To the extent Employee has retained any director, officer and/or manager positions with the Company subsequent to Employee’s termination of employment, and to the extent Employee has not already done so, Employee, by executing this Agreement on the date set forth below, hereby resigns, effective immediately, from any and all director, officer and manager positions with the Company.

8.Neutral Reference. Employee should direct any request by a prospective employer to the AEPSC Employee Service Center (hr@aep.com or 1-888-237-2363 ext. 5), which is the contact for employment verifications. Such requests will be answered by providing job title, total time employed, and start and/or termination date.

9.Acknowledgement of Covenants. Employee affirms that Employee has received a copy of the American Electric Power Executive Severance Plan, as amended, a copy of which is attached hereto as Exhibit B (the “Plan”) and shall comply with the provisions in Article VI, during and after the Employee’s employment with the Company.

10.No Admission of Liability. Employee understands that the Company believes that Employee has no valid claim against the Company and that this Agreement is being offered to give Employee a source of income and benefits while she attempts to obtain other employment. The fact that this Agreement is offered to the Employee in the first place will not be understood as an indication that the Company believes that Employee has been injured, discriminated against, or treated unlawfully in any respect.

11.Protected Activity. (a) Employee understands and acknowledges that nothing in this Agreement prohibits, penalizes, or otherwise discourages her from reporting, providing testimony regarding, or otherwise communicating any nuclear safety concern, workplace safety concern, or public safety concern to the U.S. Nuclear Regulatory Commission (NRC) or the U.S. Department of Labor (DOL). Employee further understands and acknowledges that the provisions of this Agreement are not intended to restrict her communication with, or full cooperation in, proceedings or investigations by any agency relating to nuclear regulatory or

Page 3 of 5

AEP CONFIDENTIAL

safety issues. Employee understands that nothing in the Agreement waives her right to file a claim with the DOL pursuant to Section 211 of the Energy Reorganization Act, but the Employee expressly waives her right to recover any and all damages or other equitable relief, including, but not limited to reinstatement, back pay, front pay, compensatory damages, attorney fees or costs, that may be awarded to the Employee by the DOL as a result of such a claim.

(b) Nothing in this Agreement (including but not limited to the release and waiver of claims and the confidentiality, cooperation, non-disparagement, return of property and any other limiting provisions) (1) affects or limits Employee’s right to challenge the validity of this Agreement under the ADEA or the Older Workers Benefit Protection Act (where Employee is age 40 or older) or (2) prevents Employee from filing a charge or complaint with, from communicating with or from participating in an investigation or proceeding conducted by, the Equal Employment Opportunity Commission, the Occupational Safety and Health Administration, the National Labor Relations Board, the Securities and Exchange Commission, the Internal Revenue Service, the Department of Justice or any other federal, state or local agency charged with the enforcement of any laws, including providing documents or other information. This Agreement does not limit any right Employee may have, where eligible, to receive an award from a government agency (and not the Company) for information provided to the government agency.

12.Re-employment. Employee agrees and understands that she will not seek re-employment with the Company, and that this Agreement shall act as a complete defense to any claim of entitlement to employment or re-employment by the Company.

13.Entire Agreement. Employee and the Company acknowledge that this Agreement and the Plan contains the entire agreement and understanding of the parties and that no other representation or agreement of any kind whatsoever has been made to Employee by the Company or by any other person or entity to cause Employee to sign this Agreement.

14.Applicable Law. This Agreement shall be governed and interpreted in accordance with the laws of Ohio and applicable federal law.

15.Severability. If any provision of this Agreement is determined to be invalid or unenforceable, the Company and Employee agree that such determination shall not affect the other provisions and that all other provisions shall be enforced as if the invalid provision were not a part of this Agreement.

16.EMPLOYEE NOTICE: PLEASE READ CAREFULLY BEFORE SIGNING THIS SEVERANCE, RELEASE OF ALL CLAIMS AND NONCOMPETITION AGREEMENT.

You have twenty-one (21) calendar days within which to consider this Agreement. Should you sign the Agreement, you have the right to revoke it, in writing, for a period of seven (7) calendar days after you sign it. Any such revocation should be provided to Andy Carlin at arcarlin@aep.com. This Agreement shall not become effective or enforceable until the seven-day revocation period has expired.However, if you sign this Agreement but do not exercise the right to revoke, this Agreement will immediately become a binding and enforceable contract.

You are advised to consult with an attorney prior to signing this Agreement. You may have rights or claims arising under the Age Discrimination in Employment Act and/or Older

Page 4 of 5

AEP CONFIDENTIAL

Workers Benefit Protection Act. If you work in West Virginia, you are further advised that the toll-free number of the West Virginia State Bar Association is 1-800-642-3617.

17.Capitalized Terms and Definitions. Unless specifically defined herein, capitalized terms in this Agreement shall have the definition used in the Plan. Employee acknowledges that she has received a copy of the Plan.

18.Conclusion.The parties have read the foregoing Severance, and Release of All Claims and Noncompetition Agreement and fully understand it. They now voluntarily sign this Agreement on the date indicated, signifying their agreement and willingness to be bound by its terms.

ANN P. KELLY     AMERICAN ELECTRIC POWER

    SERVICE CORPORATION

/s/ Ann P. Kelly        By /s/ Phillip R. Ulrich    

    Name: Phillip R. Ulrich

    Title: Human Resources

Dated: 10/23/2023    Dated: 10/23/2023

Page 5 of 5

AEP CONFIDENTIAL

EX-31.A

EXHIBIT 31(a)

CERTIFICATION PURSUANT TO SECTION 302

OF THE SARBANES-OXLEY ACT OF 2002

I, Julia A. Sloat, certify that:

1.I have reviewed this report on Form 10-Q of American Electric Power Company, Inc.;

2.Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a.Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b.Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c.Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d.Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5.The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a.All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b.Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date:   November 2, 2023	By:	/s/ Julia A. Sloat
		Julia A. Sloat
		Chief Executive Officer

EX-31.A

EXHIBIT 31(a)

CERTIFICATION PURSUANT TO SECTION 302

OF THE SARBANES-OXLEY ACT OF 2002

I, Julia A. Sloat, certify that:

1.I have reviewed this report on Form 10-Q of AEP Transmission Company, LLC;

2.Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a.Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b.Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c.Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d.Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5.The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a.All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b.Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: November 2, 2023	By:	/s/ Julia A. Sloat
		Julia A. Sloat
		Chief Executive Officer

EX-31.A

EXHIBIT 31(a)

CERTIFICATION PURSUANT TO SECTION 302

OF THE SARBANES-OXLEY ACT OF 2002

I, Julia A. Sloat, certify that:

1.I have reviewed this report on Form 10-Q of AEP Texas Inc.;

2.Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a.Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b.Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c.Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d.Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5.The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a.All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b.Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date:   November 2, 2023	By:	/s/ Julia A. Sloat
		Julia A. Sloat
		Chief Executive Officer

EX-31.A

EXHIBIT 31(a)

CERTIFICATION PURSUANT TO SECTION 302

OF THE SARBANES-OXLEY ACT OF 2002

I, Julia A. Sloat, certify that:

1.I have reviewed this report on Form 10-Q of Appalachian Power Company;

2.Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a.Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b.Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c.Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d.Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5.The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a.All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b.Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date:   November 2, 2023	By:	/s/ Julia A. Sloat
		Julia A. Sloat
		Chief Executive Officer

EX-31.A

EXHIBIT 31(a)

CERTIFICATION PURSUANT TO SECTION 302

OF THE SARBANES-OXLEY ACT OF 2002

I, Julia A. Sloat, certify that:

1.I have reviewed this report on Form 10-Q of Indiana Michigan Power Company;

2.Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a.Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b.Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c.Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d.Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5.The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a.All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b.Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date:   November 2, 2023	By:	/s/ Julia A. Sloat
		Julia A. Sloat
		Chief Executive Officer

EX-31.A

EXHIBIT 31(a)

CERTIFICATION PURSUANT TO SECTION 302

OF THE SARBANES-OXLEY ACT OF 2002

I, Julia A. Sloat, certify that:

1.I have reviewed this report on Form 10-Q of Ohio Power Company;

2.Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a.Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b.Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c.Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d.Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5.The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a.All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b.Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date:   November 2, 2023	By:	/s/ Julia A. Sloat
		Julia A Sloat
		Chief Executive Officer

EX-31.A

EXHIBIT 31(a)

CERTIFICATION PURSUANT TO SECTION 302

OF THE SARBANES-OXLEY ACT OF 2002

I, Julia A. Sloat, certify that:

1.I have reviewed this report on Form 10-Q of Public Service Company of Oklahoma;

2.Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a.Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b.Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c.Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d.Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5.The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a.All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b.Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date:   November 2, 2023	By:	/s/ Julia A. Sloat
		Julia A. Sloat
		Chief Executive Officer

EX-31.A

EXHIBIT 31(a)

CERTIFICATION PURSUANT TO SECTION 302

OF THE SARBANES-OXLEY ACT OF 2002

I, Julia A. Sloat, certify that:

1.I have reviewed this report on Form 10-Q of Southwestern Electric Power Company;

2.Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a.Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b.Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c.Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d.Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5.The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a.All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b.Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date:   November 2, 2023	By:	/s/ Julia A. Sloat
		Julia A. Sloat
		Chief Executive Officer

EX-31.B

EXHIBIT 31(b)

CERTIFICATION PURSUANT TO SECTION 302

OF THE SARBANES-OXLEY ACT OF 2002

I, Charles E. Zebula, certify that:

1.I have reviewed this report on Form 10-Q of American Electric Power Company, Inc.;

2.Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a.Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b.Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c.Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d.Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5.The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a.All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b.Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date:   November 2, 2023	By:	/s/ Charles E. Zebula
		Charles E. Zebula
		Chief Financial Officer

EX-31.B

EXHIBIT 31(b)

CERTIFICATION PURSUANT TO SECTION 302

OF THE SARBANES-OXLEY ACT OF 2002

I, Charles E. Zebula, certify that:

1.I have reviewed this report on Form 10-Q of AEP Transmission Company, LLC;

2.Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a.Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b.Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c.Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d.Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5.The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a.All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b.Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date:   November 2, 2023	By:	/s/ Charles E. Zebula
		Charles E. Zebula
		Chief Financial Officer

EX-31.B

EXHIBIT 31(b)

CERTIFICATION PURSUANT TO SECTION 302

OF THE SARBANES-OXLEY ACT OF 2002

I, Charles E. Zebula, certify that:

1.I have reviewed this report on Form 10-Q of AEP Texas Inc.;

2.Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a.Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b.Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c.Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d.Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5.The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a.All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b.Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date:   November 2, 2023	By:	/s/ Charles E. Zebula
		Charles E. Zebula
		Chief Financial Officer

EX-31.B

EXHIBIT 31(b)

CERTIFICATION PURSUANT TO SECTION 302

OF THE SARBANES-OXLEY ACT OF 2002

I, Charles E. Zebula, certify that:

1.I have reviewed this report on Form 10-Q of Appalachian Power Company;

2.Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a.Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b.Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c.Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d.Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5.The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a.All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b.Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date:   November 2, 2023	By:	/s/ Charles E. Zebula
		Charles E. Zebula
		Chief Financial Officer

EX-31.B

EXHIBIT 31(b)

CERTIFICATION PURSUANT TO SECTION 302

OF THE SARBANES-OXLEY ACT OF 2002

I, Charles E. Zebula, certify that:

1.I have reviewed this report on Form 10-Q of Indiana Michigan Power Company;

2.Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a.Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b.Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c.Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d.Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5.The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a.All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b.Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date:   November 2, 2023	By:	/s/ Charles E. Zebula
		Charles E. Zebula
		Chief Financial Officer

EX-31.B

EXHIBIT 31(b)

CERTIFICATION PURSUANT TO SECTION 302

OF THE SARBANES-OXLEY ACT OF 2002

I, Charles E. Zebula, certify that:

1.I have reviewed this report on Form 10-Q of Ohio Power Company;

2.Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a.Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b.Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c.Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d.Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5.The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a.All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b.Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date:   November 2, 2023	By:	/s/ Charles E. Zebula
		Charles E. Zebula
		Chief Financial Officer

EX-31.B

EXHIBIT 31(b)

CERTIFICATION PURSUANT TO SECTION 302

OF THE SARBANES-OXLEY ACT OF 2002

I, Charles E. Zebula, certify that:

1.I have reviewed this report on Form 10-Q of Public Service Company of Oklahoma;

2.Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a.Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b.Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c.Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d.Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5.The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a.All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b.Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date:   November 2, 2023	By:	/s/ Charles E. Zebula
		Charles E. Zebula
		Chief Financial Officer

EX-31.B

EXHIBIT 31(b)

CERTIFICATION PURSUANT TO SECTION 302

OF THE SARBANES-OXLEY ACT OF 2002

I, Charles E. Zebula, certify that:

1.I have reviewed this report on Form 10-Q of Southwestern Electric Power Company;

2.Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a.Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b.Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c.Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d.Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5.The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a.All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b.Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date:   November 2, 2023	By:	/s/ Charles E. Zebula
		Charles E. Zebula
		Chief Financial Officer

EX-32.A

Exhibit 32(a)

This Certification is being furnished and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liability of that section.  This Certification shall not be incorporated by reference into any registration statement or other document pursuant to the Securities Act of 1933, except as otherwise stated in such filing.

Certification Pursuant to Section 1350 of Chapter 63

of Title 18 of the United States Code

In connection with the Quarterly Report of American Electric Power Company, Inc. (the “Company”) on Form 10-Q (the “Report”) for the quarter ended September 30, 2023 as filed with the Securities and Exchange Commission on the date hereof, I, Julia A. Sloat, the chief executive officer of the Company certify pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 that, based on my knowledge (i) the Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934 and (ii) the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

/s/ Julia A. Sloat

Julia A. Sloat

Chief Executive Officer

November 2, 2023

A signed original of this written statement required by Section 906 has been provided to American Electric Power Company, Inc. and will be retained by American Electric Power Company, Inc. and furnished to the Securities and Exchange Commission or its staff upon request.

EX-32.A

Exhibit 32(a)

This Certification is being furnished and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liability of that section.  This Certification shall not be incorporated by reference into any registration statement or other document pursuant to the Securities Act of 1933, except as otherwise stated in such filing.

Certification Pursuant to Section 1350 of Chapter 63

of Title 18 of the United States Code

In connection with the Quarterly Report of AEP Transmission Company, LLC (the “Company”) on Form 10-Q (the “Report”) for the quarter ended September 30, 2023 as filed with the Securities and Exchange Commission on the date hereof, I, Julia A. Sloat, the chief executive officer of the Company certify pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 that, based on my knowledge (i) the Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934 and (ii) the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

/s/ Julia A. Sloat

Julia A. Sloat

Chief Executive Officer

November 2, 2023

A signed original of this written statement required by Section 906 has been provided to AEP Transmission Company, LLC and will be retained by AEP Transmission Company, LLC and furnished to the Securities and Exchange Commission or its staff upon request.

EX-32.A

Exhibit 32(a)

This Certification is being furnished and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liability of that section.  This Certification shall not be incorporated by reference into any registration statement or other document pursuant to the Securities Act of 1933, except as otherwise stated in such filing.

Certification Pursuant to Section 1350 of Chapter 63

of Title 18 of the United States Code

In connection with the Quarterly Report of AEP Texas Inc. (the “Company”) on Form 10-Q (the “Report”) for the quarter ended September 30, 2023 as filed with the Securities and Exchange Commission on the date hereof, I, Julia A. Sloat, the chief executive officer of the Company certify pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 that, based on my knowledge (i) the Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934 and (ii) the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

/s/ Julia A. Sloat

Julia A. Sloat

Chief Executive Officer

November 2, 2023

A signed original of this written statement required by Section 906 has been provided to AEP Texas Inc. and will be retained by AEP Texas Inc. and furnished to the Securities and Exchange Commission or its staff upon request.

EX-32.A

Exhibit 32(a)

This Certification is being furnished and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liability of that section.  This Certification shall not be incorporated by reference into any registration statement or other document pursuant to the Securities Act of 1933, except as otherwise stated in such filing.

Certification Pursuant to Section 1350 of Chapter 63

of Title 18 of the United States Code

In connection with the Quarterly Report of Appalachian Power Company (the “Company”) on Form 10-Q (the “Report”) for the quarter ended September 30, 2023 as filed with the Securities and Exchange Commission on the date hereof, I, Julia A. Sloat, the chief executive officer of the Company certify pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 that, based on my knowledge (i) the Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934 and (ii) the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

/s/ Julia A. Sloat

Julia A. Sloat

Chief Executive Officer

November 2, 2023

A signed original of this written statement required by Section 906 has been provided to Appalachian Power Company and will be retained by Appalachian Power Company and furnished to the Securities and Exchange Commission or its staff upon request.

EX-32.A

Exhibit 32(a)

This Certification is being furnished and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liability of that section.  This Certification shall not be incorporated by reference into any registration statement or other document pursuant to the Securities Act of 1933, except as otherwise stated in such filing.

Certification Pursuant to Section 1350 of Chapter 63

of Title 18 of the United States Code

In connection with the Quarterly Report of Indiana Michigan Power Company (the “Company”) on Form 10-Q (the “Report”) for the quarter ended September 30, 2023 as filed with the Securities and Exchange Commission on the date hereof, I, Julia A. Sloat, the chief executive officer of the Company certify pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 that, based on my knowledge (i) the Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934 and (ii) the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

/s/ Julia A. Sloat

Julia A. Sloat

Chief Executive Officer

November 2, 2023

A signed original of this written statement required by Section 906 has been provided to Indiana Michigan Power Company and will be retained by Indiana Michigan Power Company and furnished to the Securities and Exchange Commission or its staff upon request.

EX-32.A

Exhibit 32(a)

This Certification is being furnished and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liability of that section.  This Certification shall not be incorporated by reference into any registration statement or other document pursuant to the Securities Act of 1933, except as otherwise stated in such filing.

Certification Pursuant to Section 1350 of Chapter 63

of Title 18 of the United States Code

In connection with the Quarterly Report of Ohio Power Company (the “Company”) on Form 10-Q (the “Report”) for the quarter ended September 30, 2023 as filed with the Securities and Exchange Commission on the date hereof, I, Julia A. Sloat, the chief executive officer of the Company certify pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 that, based on my knowledge (i) the Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934 and (ii) the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

/s/ Julia A. Sloat

Julia A. Sloat

Chief Executive Officer

November 2, 2023

A signed original of this written statement required by Section 906 has been provided to Ohio Power Company and will be retained by Ohio Power Company and furnished to the Securities and Exchange Commission or its staff upon request.

EX-32.A

Exhibit 32(a)

This Certification is being furnished and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liability of that section.  This Certification shall not be incorporated by reference into any registration statement or other document pursuant to the Securities Act of 1933, except as otherwise stated in such filing.

Certification Pursuant to Section 1350 of Chapter 63

of Title 18 of the United States Code

In connection with the Quarterly Report of Public Service Company of Oklahoma (the “Company”) on Form 10-Q (the “Report”) for the quarter ended September 30, 2023 as filed with the Securities and Exchange Commission on the date hereof, I, Julia A. Sloat, the chief executive officer of the Company certify pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 that, based on my knowledge (i) the Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934 and (ii) the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

/s/ Julia A. Sloat

Julia A. Sloat

Chief Executive Officer

November 2, 2023

A signed original of this written statement required by Section 906 has been provided to Public Service Company of Oklahoma and will be retained by Public Service Company of Oklahoma and furnished to the Securities and Exchange Commission or its staff upon request.

EX-32.A

Exhibit 32(a)

This Certification is being furnished and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liability of that section.  This Certification shall not be incorporated by reference into any registration statement or other document pursuant to the Securities Act of 1933, except as otherwise stated in such filing.

Certification Pursuant to Section 1350 of Chapter 63

of Title 18 of the United States Code

In connection with the Quarterly Report of Southwestern Electric Power Company (the “Company”) on Form 10-Q (the “Report”) for the quarter ended September 30, 2023 as filed with the Securities and Exchange Commission on the date hereof, I, Julia A. Sloat, the chief executive officer of the Company certify pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 that, based on my knowledge (i) the Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934 and (ii) the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

/s/ Julia A. Sloat

Julia A. Sloat

Chief Executive Officer

November 2, 2023

A signed original of this written statement required by Section 906 has been provided to Southwestern Electric Power Company and will be retained by Southwestern Electric Power Company and furnished to the Securities and Exchange Commission or its staff upon request.

EX-32.B

Exhibit 32(b)

This Certification is being furnished and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liability of that section.  This Certification shall not be incorporated by reference into any registration statement or other document pursuant to the Securities Act of 1933, except as otherwise stated in such filing.

Certification Pursuant to Section 1350 of Chapter 63

of Title 18 of the United States Code

In connection with the Quarterly Report of American Electric Power Company, Inc. (the “Company”) on Form 10-Q (the “Report”) for the quarter ended September 30, 2023 as filed with the Securities and Exchange Commission on the date hereof, I, Charles E. Zebula, the chief financial officer of the Company certify pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 that, based on my knowledge (i) the Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934 and (ii) the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

/s/ Charles E. Zebula

Charles E. Zebula

Chief Financial Officer

November 2, 2023

A signed original of this written statement required by Section 906 has been provided to American Electric Power Company, Inc. and will be retained by American Electric Power Company, Inc. and furnished to the Securities and Exchange Commission or its staff upon request.

EX-32.B

Exhibit 32(b)

This Certification is being furnished and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liability of that section.  This Certification shall not be incorporated by reference into any registration statement or other document pursuant to the Securities Act of 1933, except as otherwise stated in such filing.

Certification Pursuant to Section 1350 of Chapter 63

of Title 18 of the United States Code

In connection with the Quarterly Report of AEP Transmission Company, LLC (the “Company”) on Form 10-Q (the “Report”) for the quarter ended September 30, 2023 as filed with the Securities and Exchange Commission on the date hereof, I, Charles E. Zebula, the chief financial officer of the Company certify pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 that, based on my knowledge (i) the Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934 and (ii) the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

/s/ Charles E. Zebula

Charles E. Zebula

Chief Financial Officer

November 2, 2023

A signed original of this written statement required by Section 906 has been provided to AEP Transmission Company, LLC and will be retained by AEP Transmission Company, LLC and furnished to the Securities and Exchange Commission or its staff upon request.

EX-32.B

Exhibit 32(b)

This Certification is being furnished and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liability of that section.  This Certification shall not be incorporated by reference into any registration statement or other document pursuant to the Securities Act of 1933, except as otherwise stated in such filing.

Certification Pursuant to Section 1350 of Chapter 63

of Title 18 of the United States Code

In connection with the Quarterly Report of AEP Texas Inc. (the “Company”) on Form 10-Q (the “Report”) for the quarter ended September 30, 2023 as filed with the Securities and Exchange Commission on the date hereof, I, Charles E. Zebula, the chief financial officer of the Company certify pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 that, based on my knowledge (i) the Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934 and (ii) the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

/s/ Charles E. Zebula

Charles E. Zebula

Chief Financial Officer

November 2, 2023

A signed original of this written statement required by Section 906 has been provided to AEP Texas Inc. and will be retained by AEP Texas Inc. and furnished to the Securities and Exchange Commission or its staff upon request.

EX-32.B

Exhibit 32(b)

This Certification is being furnished and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liability of that section.  This Certification shall not be incorporated by reference into any registration statement or other document pursuant to the Securities Act of 1933, except as otherwise stated in such filing.

Certification Pursuant to Section 1350 of Chapter 63

of Title 18 of the United States Code

In connection with the Quarterly Report of Appalachian Power Company (the “Company”) on Form 10-Q (the “Report”) for the quarter ended September 30, 2023 as filed with the Securities and Exchange Commission on the date hereof, I, Charles E. Zebula, the chief financial officer of the Company certify pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 that, based on my knowledge (i) the Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934 and (ii) the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

/s/ Charles E. Zebula

Charles E. Zebula

Chief Financial Officer

November 2, 2023

A signed original of this written statement required by Section 906 has been provided to Appalachian Power Company and will be retained by Appalachian Power Company and furnished to the Securities and Exchange Commission or its staff upon request.

EX-32.B

Exhibit 32(b)

This Certification is being furnished and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liability of that section.  This Certification shall not be incorporated by reference into any registration statement or other document pursuant to the Securities Act of 1933, except as otherwise stated in such filing.

Certification Pursuant to Section 1350 of Chapter 63

of Title 18 of the United States Code

In connection with the Quarterly Report of Indiana Michigan Power Company (the “Company”) on Form 10-Q (the “Report”) for the quarter ended September 30, 2023 as filed with the Securities and Exchange Commission on the date hereof, I, Charles E. Zebula, the chief financial officer of the Company certify pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 that, based on my knowledge (i) the Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934 and (ii) the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

/s/ Charles E. Zebula

Charles E. Zebula

Chief Financial Officer

November 2, 2023

A signed original of this written statement required by Section 906 has been provided to Indiana Michigan Power Company and will be retained by Indiana Michigan Power Company and furnished to the Securities and Exchange Commission or its staff upon request.

EX-32.B

Exhibit 32(b)

This Certification is being furnished and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liability of that section.  This Certification shall not be incorporated by reference into any registration statement or other document pursuant to the Securities Act of 1933, except as otherwise stated in such filing.

Certification Pursuant to Section 1350 of Chapter 63

of Title 18 of the United States Code

In connection with the Quarterly Report of Ohio Power Company (the “Company”) on Form 10-Q (the “Report”) for the quarter ended September 30, 2023 as filed with the Securities and Exchange Commission on the date hereof, I, Charles E. Zebula, the chief financial officer of the Company certify pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 that, based on my knowledge (i) the Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934 and (ii) the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

/s/ Charles E. Zebula

Charles E. Zebula

Chief Financial Officer

November 2, 2023

A signed original of this written statement required by Section 906 has been provided to Ohio Power Company and will be retained by Ohio Power Company and furnished to the Securities and Exchange Commission or its staff upon request.

EX-32.B

Exhibit 32(b)

This Certification is being furnished and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liability of that section.  This Certification shall not be incorporated by reference into any registration statement or other document pursuant to the Securities Act of 1933, except as otherwise stated in such filing.

Certification Pursuant to Section 1350 of Chapter 63

of Title 18 of the United States Code

In connection with the Quarterly Report of Public Service Company of Oklahoma (the “Company”) on Form 10-Q (the “Report”) for the quarter ended September 30, 2023 as filed with the Securities and Exchange Commission on the date hereof, I, Charles E. Zebula, the chief financial officer of the Company certify pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 that, based on my knowledge (i) the Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934 and (ii) the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

/s/ Charles E. Zebula

Charles E. Zebula

Chief Financial Officer

November 2, 2023

A signed original of this written statement required by Section 906 has been provided to Public Service Company of Oklahoma and will be retained by Public Service Company of Oklahoma and furnished to the Securities and Exchange Commission or its staff upon request.

EX-32.B

Exhibit 32(b)

This Certification is being furnished and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liability of that section.  This Certification shall not be incorporated by reference into any registration statement or other document pursuant to the Securities Act of 1933, except as otherwise stated in such filing.

Certification Pursuant to Section 1350 of Chapter 63

of Title 18 of the United States Code

In connection with the Quarterly Report of Southwestern Electric Power Company (the “Company”) on Form 10-Q (the “Report”) for the quarter ended September 30, 2023 as filed with the Securities and Exchange Commission on the date hereof, I, Charles E. Zebula, the chief financial officer of the Company certify pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 that, based on my knowledge (i) the Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934 and (ii) the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

/s/ Charles E. Zebula

Charles E. Zebula

Chief Financial Officer

November 2, 2023

A signed original of this written statement required by Section 906 has been provided to Southwestern Electric Power Company and will be retained by Southwestern Electric Power Company and furnished to the Securities and Exchange Commission or its staff upon request.

EX-95

Exhibit 95

MINE SAFETY INFORMATION

The Federal Mine Safety and Health Act of 1977 (Mine Act) imposes stringent health and safety standards on various mining operations. The Mine Act and its related regulations affect numerous aspects of mining operations, including training of mine personnel, mining procedures, equipment used in mine emergency procedures, mine plans and other matters. SWEPCo, through its ownership of Dolet Hills Lignite Company (DHLC), a wholly-owned lignite mining subsidiary of SWEPCo, is subject to the provisions of the Mine Act.

The Dodd-Frank Wall Street Reform and Consumer Protection Act (Dodd-Frank Act) requires companies that operate mines to include in their periodic reports filed with the SEC, certain mine safety information covered by the Mine Act. DHLC received the following notices of violation and proposed assessments under the Mine Act for the quarter ended September 30, 2023:

Number of Citations for S&S Violations of Mandatory Health or Safety Standards under 104 *	—
Number of Orders Issued under 104(b) *	—
Number of Citations and Orders for Unwarrantable Failure to Comply with Mandatory Health or Safety Standards under 104(d) *	—
Number of Flagrant Violations under 110(b)(2) *	—
Number of Imminent Danger Orders Issued under 107(a) *	—
Total Dollar Value of Proposed Assessments **	$	—
Number of Mining-related Fatalities	—

*    References to sections under the Mine Act.

**     DHLC received no citations during the third quarter of 2023. There were no proposed assessments received this quarter.

There are currently no legal actions pending before the Federal Mine Safety and Health Review Commission.

XML

Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2023	Nov. 02, 2023
Entity Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2023
Document Transition Report	false
Entity File Number	1-3525
Entity Registrant Name	AMERICAN ELECTRIC POWER CO INC.
Entity Incorporation, State or Country Code	NY
Entity Tax Identification Number	13-4922640
Entity Address, Address Line One	1 Riverside Plaza,
Entity Address, City or Town	Columbus,
Entity Address, State or Province	OH
Entity Address, Postal Zip Code	43215-2373
City Area Code	(614)
Local Phone Number	716-1000
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		525,875,633
Entity Central Index Key	0000004904
Amendment Flag	false
Document Fiscal Year Focus	2023
Document Fiscal Period Focus	Q3
Current Fiscal Year End Date	--12-31
AEP Texas Inc. [Member]
Entity Information [Line Items]
Entity File Number	333-221643
Entity Registrant Name	AEP TEXAS INC.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	51-0007707
Entity Filer Category	Non-accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Common Stock, Shares Outstanding		100
Entity Central Index Key	0001721781
AEP Transmission Co [Member]
Entity Information [Line Items]
Entity File Number	333-217143
Entity Registrant Name	AEP TRANSMISSION COMPANY, LLC
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	46-1125168
Entity Filer Category	Non-accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Central Index Key	0001702494
Appalachian Power Co [Member]
Entity Information [Line Items]
Entity File Number	1-3457
Entity Registrant Name	APPALACHIAN POWER COMPANY
Entity Incorporation, State or Country Code	VA
Entity Tax Identification Number	54-0124790
Entity Filer Category	Non-accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Common Stock, Shares Outstanding		13,499,500
Entity Central Index Key	0000006879
Indiana Michigan Power Co [Member]
Entity Information [Line Items]
Entity File Number	1-3570
Entity Registrant Name	INDIANA MICHIGAN POWER COMPANY
Entity Incorporation, State or Country Code	IN
Entity Tax Identification Number	35-0410455
Entity Filer Category	Non-accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Common Stock, Shares Outstanding		1,400,000
Entity Central Index Key	0000050172
Ohio Power Co [Member]
Entity Information [Line Items]
Entity File Number	1-6543
Entity Registrant Name	OHIO POWER COMPANY
Entity Incorporation, State or Country Code	OH
Entity Tax Identification Number	31-4271000
Entity Filer Category	Non-accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Common Stock, Shares Outstanding		27,952,473
Entity Central Index Key	0000073986
Public Service Co Of Oklahoma [Member]
Entity Information [Line Items]
Entity File Number	0-343
Entity Registrant Name	PUBLIC SERVICE COMPANY OF OKLAHOMA
Entity Incorporation, State or Country Code	OK
Entity Tax Identification Number	73-0410895
Entity Filer Category	Non-accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Common Stock, Shares Outstanding		9,013,000
Entity Central Index Key	0000081027
Southwestern Electric Power Co [Member]
Entity Information [Line Items]
Entity File Number	1-3146
Entity Registrant Name	SOUTHWESTERN ELECTRIC POWER COMPANY
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	72-0323455
Entity Filer Category	Non-accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Common Stock, Shares Outstanding		3,680
Entity Central Index Key	0000092487
The NASDAQ Stock Market LLC | Common Stock [Member]
Entity Information [Line Items]
Title of 12(b) Security	Common Stock, $6.50 par value
Trading Symbol	AEP
Security Exchange Name	NASDAQ

XML

Consolidated Statements of Income - USD ($) $ in Millions		3 Months Ended				9 Months Ended
		Sep. 30, 2023		Sep. 30, 2022		Sep. 30, 2023		Sep. 30, 2022
Revenues
Revenue from Contracts with Customers		$ 5,341.7		$ 5,526.1		$ 14,405.1		$ 14,758.4
TOTAL REVENUES		5,341.7		5,526.1		14,405.1		14,758.4
Expenses
Other Operation		719.9		797.0		2,031.1		2,079.0
Maintenance		325.5		298.1		982.8		909.6
Asset Impairments and Other Related Charges		0.0		24.9		0.0		24.9
Establishment of Regulatory Asset		0.0		(37.0)		0.0		(37.0)
Depreciation and Amortization		792.3		821.8		2,309.4		2,416.8
Taxes Other Than Income Taxes		393.9		384.8		1,149.2		1,118.5
TOTAL EXPENSES		3,988.4		4,596.0		11,472.3		11,835.8
OPERATING INCOME (LOSS)		1,353.3		930.1		2,932.8		2,922.6
Other Income (Expense):
Other Income		11.9		4.8		41.0		(5.6)
Allowance for Equity Funds Used During Construction		51.1		35.6		123.4		95.2
Non-Service Cost Components of Net Periodic Benefit Cost		55.2		47.2		165.9		141.5
Interest Expense		(470.3)		(360.7)		(1,346.0)		(1,001.7)
INCOME BEFORE INCOME TAX EXPENSE AND EQUITY EARNINGS		1,001.2		657.0		1,917.1		2,152.0
Income Tax Expense (Benefit)		64.2		(16.1)		103.2		90.7
Equity Earnings (Loss) of Unconsolidated Subsidiaries		21.3		10.2		60.9		(139.1)
Net Income (Loss)		958.3		683.3		1,874.8		1,922.2
Net Income (Loss) Attributable to Noncontrolling Interests		4.6		(0.4)		2.9		(0.7)
Earnings Attributable to Common Shareholders		$ 953.7		$ 683.7		$ 1,871.9		$ 1,922.9
Earnings Per Share
Weighted Average Number of Basic AEP Common Shares Outstanding		520,459,880		513,730,196		516,528,239		511,162,723
Total Basic Earnings Per Share Attributable to AEP Common Shareholders		$ 1.83		$ 1.33		$ 3.62		$ 3.76
Weighted Average Number of Diluted AEP Common Shares Outstanding		521,444,125		515,315,994		517,784,726		512,714,006
Total Diluted Earnings Per Share Attributable to AEP Common Shareholders		$ 1.83		$ 1.33		$ 3.62		$ 3.75
Common Stock, Dividends Per Share, Declared		$ 0.83		$ 0.78
Acquisition Of Nuclear Fuel Included In Current Liabilities						$ 9.5		$ 8.5
Cash Flow Hedges, Tax		$ (0.3)		$ (19.5)		(31.5)		81.6
Amortization of Pension and OPEB Deferred Costs, Tax		(0.8)		(0.8)		(5.9)		(4.5)
Related Party
Revenues
Revenue from Contracts with Customers		0.0		0.0		0.0		0.0
Vertically Integrated Utilities [Member]
Revenues
Revenue from Contracts with Customers		3,158.1		3,174.6		8,603.4		8,416.4
Transmission and Distribution Utilities [Member]
Revenues
Revenue from Contracts with Customers		1,535.2		1,525.5		4,321.3		4,064.5
Generation and Marketing [Member]
Revenues
Revenue from Contracts with Customers		527.5		733.1		1,172.6		1,997.0
Other Revenues [Member]
Revenues
Revenue from Contracts with Customers		120.9		92.9		307.8		280.5
TOTAL REVENUES		8.5	[1]	128.3	[2],[3]	(250.2)	[4],[5]	429.4	[6],[7]
Purchased Electricity, Fuel and Other Consumables Used for Electric Generation [Member]
Expenses
Cost of Goods and Services Sold		1,756.8		2,111.9		4,887.8		5,177.0
AEP Texas Inc. [Member]
Revenues
TOTAL REVENUES		554.6		508.9		1,445.3		1,404.4
Expenses
Other Operation		154.4		163.8		395.2		431.6
Maintenance		25.0		22.7		75.7		70.1
Depreciation and Amortization		125.6		117.7		351.5		342.7
Taxes Other Than Income Taxes		48.6		45.5		136.9		125.8
TOTAL EXPENSES		353.6		349.7		959.3		970.2
OPERATING INCOME (LOSS)		201.0		159.2		486.0		434.2
Other Income (Expense):
Interest Income		0.5		1.3		1.5		2.7
Allowance for Equity Funds Used During Construction		7.8		5.2		19.4		13.2
Non-Service Cost Components of Net Periodic Benefit Cost		4.8		4.2		14.4		12.5
Interest Expense		(59.9)		(55.4)		(173.1)		(153.2)
INCOME BEFORE INCOME TAX EXPENSE AND EQUITY EARNINGS		154.2		114.5		348.2		309.4
Income Tax Expense (Benefit)		28.7		20.9		66.0		56.2
Net Income (Loss)		125.5		93.6		282.2		253.2
Earnings Per Share
Cash Flow Hedges, Tax		0.0		0.1		0.8		0.2
Amortization of Pension and OPEB Deferred Costs, Tax		0.0		0.0		(0.1)		0.0
AEP Texas Inc. [Member] | Related Party
Revenues
Revenue from Contracts with Customers		1.2		0.9		3.7		2.6
AEP Texas Inc. [Member] | Transmission and Distribution Utilities [Member]
Revenues
Revenue from Contracts with Customers		551.6		507.7		1,438.7		1,399.3
AEP Texas Inc. [Member] | Other Revenues [Member]
Revenues
Revenue from Contracts with Customers		1.8		0.3		2.9		2.5
TOTAL REVENUES		0.0	[8]	0.0	[9]	0.0	[10]	0.0	[11]
AEP Transmission Co [Member]
Revenues
Provision for Refund Affiliated		(4.8)		(9.3)		(17.9)		(65.7)
Provision for Refund-Nonaffiliated		(1.0)		(1.9)		(4.8)		(12.2)
TOTAL REVENUES		462.7		418.5		1,349.2		1,183.3
Expenses
Other Operation		31.6		39.6		87.0		94.7
Maintenance		5.1		4.1		14.3		11.2
Depreciation and Amortization		99.6		87.4		291.2		256.2
Taxes Other Than Income Taxes		73.8		68.7		216.6		203.0
TOTAL EXPENSES		210.1		199.8		609.1		565.1
OPERATING INCOME (LOSS)		252.6		218.7		740.1		618.2
Other Income (Expense):
Interest Income		1.6		0.7		5.7		1.0
Allowance for Equity Funds Used During Construction		22.7		20.3		62.2		51.2
Interest Expense		(51.6)		(42.7)		(147.5)		(119.7)
INCOME BEFORE INCOME TAX EXPENSE AND EQUITY EARNINGS		225.3		197.0		660.5		550.7
Income Tax Expense (Benefit)		46.1		44.3		142.9		124.1
Net Income (Loss)		179.2		152.7		517.6		426.6
Earnings Per Share
Revenues from Related Parties, Net of Provisions for Refund		369.9		331.3		1,080.0		933.8
AEP Transmission Co [Member] | Related Party
Revenues
Revenue from Contracts with Customers		374.7		340.6		1,097.9		999.5
AEP Transmission Co [Member] | AEPTCo Parent [Member]
Revenues
Revenue from Contracts with Customers		0.0		0.0		0.0		0.0
TOTAL REVENUES		0.0		0.0		0.0		0.0
Other Income (Expense):
Net Income (Loss)	[12]	1.0		0.1		3.6		0.2
AEP Transmission Co [Member] | AEPTCo Parent [Member] | Related Party
Revenues
Revenue from Contracts with Customers		0.0		0.0		0.0		0.0
AEP Transmission Co [Member] | State Transcos [Member]
Revenues
TOTAL REVENUES		462.7		418.5		1,349.2		1,183.3
Other Income (Expense):
Net Income (Loss)		178.2		152.6		514.0		426.4
AEP Transmission Co [Member] | State Transcos [Member] | Related Party
Revenues
Revenue from Contracts with Customers		369.9		331.3		1,080.0		933.8
AEP Transmission Co [Member] | Transmission [Member]
Revenues
Revenue from Contracts with Customers		93.8		89.1		274.0		261.7
Earnings Per Share
Revenue from Contract with Customers, Net of Provisions for Refund, Including Assessed Tax		92.8		87.2		269.2		249.5
AEP Transmission Co [Member] | Transmission [Member] | State Transcos [Member]
Revenues
Revenue from Contracts with Customers		92.8		87.2		269.2		249.5
AEP Transmission Co [Member] | Other Revenues [Member]
Revenues
TOTAL REVENUES		0.0	[8]	0.0	[9]	0.0	[10]	0.0	[11]
Appalachian Power Co [Member]
Revenues
TOTAL REVENUES		961.8		888.9		2,776.0		2,569.8
Expenses
Other Operation		187.9		182.0		569.6		514.0
Maintenance		74.3		69.3		222.5		214.6
Asset Impairments and Other Related Charges		0.0		24.9		0.0		24.9
Establishment of Regulatory Asset		0.0		(37.0)		0.0		(37.0)
Depreciation and Amortization		143.7		142.9		424.8		431.0
Taxes Other Than Income Taxes		43.5		41.5		126.5		121.0
TOTAL EXPENSES		792.6		741.6		2,304.2		2,102.7
OPERATING INCOME (LOSS)		169.2		147.3		471.8		467.1
Other Income (Expense):
Interest Income		0.8		2.6		2.2		3.0
Allowance for Equity Funds Used During Construction		3.6		2.2		8.7		6.8
Non-Service Cost Components of Net Periodic Benefit Cost		8.1		7.3		24.4		21.8
Interest Expense		(68.5)		(61.7)		(200.7)		(171.1)
INCOME BEFORE INCOME TAX EXPENSE AND EQUITY EARNINGS		113.2		97.7		306.4		327.6
Income Tax Expense (Benefit)		21.3		5.0		59.1		24.5
Net Income (Loss)		91.9		92.7		247.3		303.1
Earnings Per Share
Cash Flow Hedges, Tax		(0.1)		(0.1)		(0.2)		(0.2)
Amortization of Pension and OPEB Deferred Costs, Tax		(0.2)		(0.3)		(0.6)		(0.9)
Appalachian Power Co [Member] | Related Party
Revenues
Revenue from Contracts with Customers		62.5		67.6		193.2		187.6
Appalachian Power Co [Member] | Vertically Integrated Utilities [Member]
Revenues
Revenue from Contracts with Customers		896.0		818.4		2,573.0		2,370.4
Appalachian Power Co [Member] | Other Revenues [Member]
Revenues
Revenue from Contracts with Customers		3.3		2.9		9.8		11.8
TOTAL REVENUES		0.1	[8]	0.3	[9]	0.1	[10]	0.4	[11]
Appalachian Power Co [Member] | Fuel and Other Consumables Used for Electric Generation [Member]
Expenses
Cost of Goods and Services Sold		343.2		318.0		960.8		834.2
Indiana Michigan Power Co [Member]
Revenues
TOTAL REVENUES		676.3		715.4		1,938.5		1,971.6
Expenses
Purchased Electricity from AEP Affiliates		57.0		67.9		139.2		184.6
Other Operation		168.9		162.4		508.7		450.9
Maintenance		57.3		55.9		173.0		167.7
Depreciation and Amortization		116.7		131.6		352.9		400.2
Taxes Other Than Income Taxes		22.3		22.4		62.4		76.2
TOTAL EXPENSES		551.5		590.8		1,558.6		1,646.8
OPERATING INCOME (LOSS)		124.8		124.6		379.9		324.8
Other Income (Expense):
Other Income		4.5		2.4		8.1		7.4
Allowance for Equity Funds Used During Construction						6.6		7.9
Non-Service Cost Components of Net Periodic Benefit Cost		7.7		6.3		23.4		18.8
Interest Expense		(33.0)		(31.2)		(102.0)		(92.5)
INCOME BEFORE INCOME TAX EXPENSE AND EQUITY EARNINGS		104.0		102.1		309.4		258.5
Income Tax Expense (Benefit)		11.0		8.0		38.8		7.7
Net Income (Loss)		93.0		94.1		270.6		250.8
Earnings Per Share
Acquisition Of Nuclear Fuel Included In Current Liabilities						9.5		8.5
Cash Flow Hedges, Tax		0.1		0.1		(0.1)		0.3
Amortization of Pension and OPEB Deferred Costs, Tax		0.0		(0.1)		(0.6)		(0.1)
Indiana Michigan Power Co [Member] | Related Party
Revenues
Revenue from Contracts with Customers		0.6		2.0		3.7		11.1
Indiana Michigan Power Co [Member] | Vertically Integrated Utilities [Member]
Revenues
Revenue from Contracts with Customers		656.1		695.7		1,879.3		1,912.1
Indiana Michigan Power Co [Member] | Other Revenues [Member]
Revenues
Revenue from Contracts with Customers		4.2		4.4		9.7		10.0
TOTAL REVENUES		2.1	[8]	0.0	[9]	2.1	[10]	(0.1)	[11]
Indiana Michigan Power Co [Member] | Other Revenues [Member] | Related Party
Revenues
Revenue from Contracts with Customers		15.4		13.3		45.8		38.4
Indiana Michigan Power Co [Member] | Purchased Electricity, Fuel and Other Consumables Used for Electric Generation [Member]
Expenses
Cost of Goods and Services Sold		129.3		150.6		322.4		367.2
Ohio Power Co [Member]
Revenues
TOTAL REVENUES		989.5		1,021.3		2,903.2		2,674.2
Expenses
Purchased Electricity from AEP Affiliates		38.0		0.0		49.6		9.8
Other Operation		296.9		267.3		836.1		728.2
Maintenance		62.2		47.8		157.7		136.7
Depreciation and Amortization		81.3		70.7		224.7		216.9
Taxes Other Than Income Taxes		132.5		131.0		382.0		379.0
TOTAL EXPENSES		871.6		916.3		2,571.0		2,345.6
OPERATING INCOME (LOSS)		117.9		105.0		332.2		328.6
Other Income (Expense):
Other Income		0.1		0.2		0.4		1.0
Allowance for Equity Funds Used During Construction		5.6		3.9		11.3		10.3
Non-Service Cost Components of Net Periodic Benefit Cost		6.5		5.6		19.5		16.6
Interest Expense		(33.9)		(29.8)		(96.9)		(88.8)
INCOME BEFORE INCOME TAX EXPENSE AND EQUITY EARNINGS		96.2		84.9		266.5		267.7
Income Tax Expense (Benefit)		15.7		13.0		40.3		38.6
Equity Earnings (Loss) of Unconsolidated Subsidiaries		0.0		0.0		0.0		0.8
Net Income (Loss)		80.5		71.9		226.2		229.9
Ohio Power Co [Member] | Related Party
Revenues
Revenue from Contracts with Customers		7.8		4.0		23.6		11.6
Ohio Power Co [Member] | Transmission and Distribution Utilities [Member]
Revenues
Revenue from Contracts with Customers		978.7		1,015.2		2,869.3		2,656.6
Ohio Power Co [Member] | Other Revenues [Member]
Revenues
Revenue from Contracts with Customers		3.0		2.1		10.3		6.0
TOTAL REVENUES		3.0	[8]	5.5	[9]	20.1	[10]	18.6	[11]
Ohio Power Co [Member] | Purchased Electricity, Fuel and Other Consumables Used for Electric Generation [Member]
Expenses
Cost of Goods and Services Sold		260.7		399.5		920.9		875.0
Public Service Co Of Oklahoma [Member]
Revenues
TOTAL REVENUES		644.2		608.2		1,535.9		1,438.7
Expenses
Other Operation		103.9		116.3		283.5		301.0
Maintenance		25.4		31.3		82.7		88.0
Depreciation and Amortization		61.8		59.5		187.8		172.7
Taxes Other Than Income Taxes		17.2		15.6		49.5		43.6
TOTAL EXPENSES		526.4		516.3		1,344.8		1,279.5
OPERATING INCOME (LOSS)		117.8		91.9		191.1		159.2
Other Income (Expense):
Other Income		2.7		3.0		6.7		8.5
Non-Service Cost Components of Net Periodic Benefit Cost		3.6		3.1		10.7		9.4
Interest Expense		(25.5)		(22.4)		(77.5)		(62.6)
INCOME BEFORE INCOME TAX EXPENSE AND EQUITY EARNINGS		98.6		75.6		131.0		114.5
Income Tax Expense (Benefit)		(40.8)		(31.3)		(57.1)		(41.2)
Net Income (Loss)		139.4		106.9		188.1		155.7
Earnings Per Share
Cash Flow Hedges, Tax		0.0		0.0		(0.4)		0.0
Public Service Co Of Oklahoma [Member] | Related Party
Revenues
Revenue from Contracts with Customers		0.2		0.7		1.0		2.1
Public Service Co Of Oklahoma [Member] | Vertically Integrated Utilities [Member]
Revenues
Revenue from Contracts with Customers		642.6		606.5		1,529.8		1,432.9
Public Service Co Of Oklahoma [Member] | Other Revenues [Member]
Revenues
Revenue from Contracts with Customers		1.4		1.0		5.1		3.7
TOTAL REVENUES		0.0	[8]	0.0	[9]	0.0	[10]	0.0	[11]
Public Service Co Of Oklahoma [Member] | Purchased Electricity, Fuel and Other Consumables Used for Electric Generation [Member]
Expenses
Cost of Goods and Services Sold		318.1		293.6		741.3		674.2
Southwestern Electric Power Co [Member]
Revenues
TOTAL REVENUES		654.8		717.5		1,708.5		1,748.9
Expenses
Other Operation		96.9		114.1		281.3		308.7
Maintenance		38.4		32.9		121.1		107.8
Depreciation and Amortization		100.6		95.8		266.8		251.8
Taxes Other Than Income Taxes		36.2		34.2		104.4		94.9
TOTAL EXPENSES		487.5		567.9		1,388.2		1,432.3
OPERATING INCOME (LOSS)		167.3		149.6		320.3		316.6
Other Income (Expense):
Interest Income		4.1		2.7		14.8		13.9
Allowance for Equity Funds Used During Construction		4.3		1.0		7.3		3.4
Non-Service Cost Components of Net Periodic Benefit Cost		3.4		3.2		10.2		9.4
Interest Expense		(42.1)		(35.2)		(107.2)		(102.0)
INCOME BEFORE INCOME TAX EXPENSE AND EQUITY EARNINGS		137.0		121.3		245.4		241.3
Income Tax Expense (Benefit)		(21.7)		(17.8)		(35.7)		(21.0)
Equity Earnings (Loss) of Unconsolidated Subsidiaries		0.3		0.3		1.0		1.0
Net Income (Loss)		159.0		139.4		282.1		263.3
Net Income (Loss) Attributable to Noncontrolling Interests		1.5		0.0		3.0		3.1
Earnings Attributable to Common Shareholders		157.5		139.4		279.1		260.2
Earnings Per Share
Cash Flow Hedges, Tax		0.0		0.0		0.1		0.0
Amortization of Pension and OPEB Deferred Costs, Tax		(0.1)		(0.1)		(0.3)		(0.3)
Southwestern Electric Power Co [Member] | Related Party
Revenues
Revenue from Contracts with Customers		14.5		18.2		40.7		43.7
Southwestern Electric Power Co [Member] | Vertically Integrated Utilities [Member]
Revenues
Revenue from Contracts with Customers		639.8		698.8		1,666.0		1,703.7
Southwestern Electric Power Co [Member] | Other Revenues [Member]
Revenues
Revenue from Contracts with Customers		0.5		0.5		1.8		1.5
TOTAL REVENUES		0.0	[8]	0.0	[9]	0.0	[10]	0.0	[11]
Southwestern Electric Power Co [Member] | Purchased Electricity, Fuel and Other Consumables Used for Electric Generation [Member]
Expenses
Cost of Goods and Services Sold		215.4		290.9		614.6		669.1
Mineral Rights
Expenses
Gain on Sale of Mineral Rights		0.0		0.0		0.0		(116.3)
Reconciling Adjustments [Member]
Revenues
Revenue from Contracts with Customers		0.0		0.0		0.0		0.0
TOTAL REVENUES		(508.4)		(425.0)		(1,416.3)		(1,190.5)
Other Income (Expense):
Net Income (Loss)		0.0		0.0		0.0		0.0
Reconciling Adjustments [Member] | Related Party
Revenues
Revenue from Contracts with Customers		(508.4)		(425.0)		(1,416.3)		(1,190.5)
Reconciling Adjustments [Member] | Other Revenues [Member]
Revenues
TOTAL REVENUES		(0.7)	[1]	(2.0)	[2],[3]	(3.6)	[4],[5]	(6.9)	[6],[7]
Reconciling Adjustments [Member] | AEP Transmission Co [Member]
Revenues
Revenue from Contracts with Customers		0.0		0.0		0.0		0.0
TOTAL REVENUES		0.0		0.0		0.0		0.0
Other Income (Expense):
Net Income (Loss)		0.0		0.0		0.0		0.0
Reconciling Adjustments [Member] | AEP Transmission Co [Member] | Related Party
Revenues
Revenue from Contracts with Customers		0.0		0.0		0.0		0.0
Competitive Contracted Renewable Portfolio
Expenses
Asset Impairments and Other Related Charges		0.0		0.0		112.0		0.0
Kentucky Operations [Member]
Expenses
Asset Impairments and Other Related Charges		$ 0.0		$ 194.5		$ 0.0		$ 263.3

[1] Amounts include affiliated and nonaffiliated revenues.

[2] Amounts include affiliated and nonaffiliated revenues

[3] Generation & Marketing includes economic hedge activity.

[4] Amounts include affiliated and nonaffiliated revenues.

[5] Generation & Marketing includes economic hedge activity.

[6] Amounts include affiliated and nonaffiliated revenues

[7] Generation & Marketing includes economic hedge activity.

[8] Amounts include affiliated and nonaffiliated revenues.

[9] Amounts include affiliated and nonaffiliated revenues.

[10] Amounts include affiliated and nonaffiliated revenues.

[11] Amounts include affiliated and nonaffiliated revenues.

[12] Includes the elimination of AEPTCo Parent’s equity earnings in the State Transcos.

XML

Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Net Income (Loss)	$ 958.3	$ 683.3	$ 1,874.8	$ 1,922.2
OTHER COMPREHENSIVE INCOME
Cash Flow Hedges, Net of Tax	(0.9)	(73.3)	(118.5)	307.1
Amortization of Pension and OPEB Deferred Costs, Net of Tax	(3.2)	(3.2)	(22.4)	(17.0)
Reclassifications of KPCo Pension and OPEB Regulatory Assets, Net of Tax	0.0	0.0	16.7	0.0
Other Comprehensive Income (Loss), Net of Tax, Total	(4.1)	(76.5)	(124.2)	290.1
TOTAL COMPREHENSIVE INCOME (LOSS)	954.2	606.8	1,750.6	2,212.3
Total Comprehensive Income (Loss) Attributable to Noncontrolling Interest	4.6	(0.4)	2.9	(0.7)
TOTAL COMPREHENSIVE INCOME (LOSS) ATTRIBUTABLE TO COMMON SHAREHOLDERS	949.6	607.2	1,747.7	2,213.0
Cash Flow Hedges, Tax	(0.3)	(19.5)	(31.5)	81.6
Amortization of Pension and OPEB Deferred Costs, Tax	(0.8)	(0.8)	(5.9)	(4.5)
Reclassifications of KPCo Pension and OPEB Regulatory Assets, Tax	0.0	0.0	4.4	0.0
Appalachian Power Co [Member]
Net Income (Loss)	91.9	92.7	247.3	303.1
OTHER COMPREHENSIVE INCOME
Cash Flow Hedges, Net of Tax	(0.2)	(0.2)	(0.6)	(0.6)
Amortization of Pension and OPEB Deferred Costs, Net of Tax	(0.7)	(1.1)	(2.3)	(3.2)
Other Comprehensive Income (Loss), Net of Tax, Total	(0.9)	(1.3)	(2.9)	(3.8)
TOTAL COMPREHENSIVE INCOME (LOSS)	91.0	91.4	244.4	299.3
Cash Flow Hedges, Tax	(0.1)	(0.1)	(0.2)	(0.2)
Amortization of Pension and OPEB Deferred Costs, Tax	(0.2)	(0.3)	(0.6)	(0.9)
AEP Texas Inc. [Member]
Net Income (Loss)	125.5	93.6	282.2	253.2
OTHER COMPREHENSIVE INCOME
Cash Flow Hedges, Net of Tax	(0.1)	0.3	3.1	0.8
Amortization of Pension and OPEB Deferred Costs, Net of Tax	0.0	0.0	(0.6)	0.0
Other Comprehensive Income (Loss), Net of Tax, Total	(0.1)	0.3	2.5	0.8
TOTAL COMPREHENSIVE INCOME (LOSS)	125.4	93.9	284.7	254.0
Cash Flow Hedges, Tax	0.0	0.1	0.8	0.2
Amortization of Pension and OPEB Deferred Costs, Tax	0.0	0.0	(0.1)	0.0
Indiana Michigan Power Co [Member]
Net Income (Loss)	93.0	94.1	270.6	250.8
OTHER COMPREHENSIVE INCOME
Cash Flow Hedges, Net of Tax	0.1	0.4	(0.5)	1.2
Amortization of Pension and OPEB Deferred Costs, Net of Tax	(0.2)	(0.1)	(2.4)	(0.3)
Other Comprehensive Income (Loss), Net of Tax, Total	(0.1)	0.3	(2.9)	0.9
TOTAL COMPREHENSIVE INCOME (LOSS)	92.9	94.4	267.7	251.7
Cash Flow Hedges, Tax	0.1	0.1	(0.1)	0.3
Amortization of Pension and OPEB Deferred Costs, Tax	0.0	(0.1)	(0.6)	(0.1)
Ohio Power Co [Member]
Net Income (Loss)	80.5	71.9	226.2	229.9
Public Service Co Of Oklahoma [Member]
Net Income (Loss)	139.4	106.9	188.1	155.7
OTHER COMPREHENSIVE INCOME
Cash Flow Hedges, Net of Tax	0.0	0.0	(1.5)	0.0
TOTAL COMPREHENSIVE INCOME (LOSS)	139.4	106.9	186.6	155.7
Cash Flow Hedges, Tax	0.0	0.0	(0.4)	0.0
Southwestern Electric Power Co [Member]
Net Income (Loss)	159.0	139.4	282.1	263.3
OTHER COMPREHENSIVE INCOME
Cash Flow Hedges, Net of Tax	0.0	0.0	0.3	0.0
Amortization of Pension and OPEB Deferred Costs, Net of Tax	(0.4)	(0.4)	(1.0)	(1.2)
Other Comprehensive Income (Loss), Net of Tax, Total	(0.4)	(0.4)	(0.7)	(1.2)
TOTAL COMPREHENSIVE INCOME (LOSS)	158.6	139.0	281.4	262.1
Total Comprehensive Income (Loss) Attributable to Noncontrolling Interest	1.5	0.0	3.0	3.1
TOTAL COMPREHENSIVE INCOME (LOSS) ATTRIBUTABLE TO COMMON SHAREHOLDERS	157.1	139.0	278.4	259.0
Cash Flow Hedges, Tax	0.0	0.0	0.1	0.0
Amortization of Pension and OPEB Deferred Costs, Tax	(0.1)	(0.1)	(0.3)	(0.3)
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]
OTHER COMPREHENSIVE INCOME
Other Comprehensive Income (Loss), Net of Tax, Total	$ (3.2)	$ (3.2)	$ (5.7)	$ (17.0)

XML

Condensed Consolidated Statements of Changes in Equity - USD ($)	Total	Vertically Integrated Utilities [Member]	Transmission and Distribution Utilities [Member]	Generation and Marketing Revenues [Member]	Other Revenues [Member]		Reconciling Adjustments [Member]	Reconciling Adjustments [Member] Other Revenues [Member]		Generation And Marketing [Member]	Generation And Marketing [Member] Generation and Marketing Revenues [Member]	Generation And Marketing [Member] Other Revenues [Member]		Other Segments [Member]	[2]	Other Segments [Member] Other Revenues [Member]		Transmission Operations [Member]	Transmission Operations [Member] Transmission [Member]	Transmission And Distribution Utilities [Member]	Transmission And Distribution Utilities [Member] Transmission and Distribution Utilities [Member]	Transmission And Distribution Utilities [Member] Other Revenues [Member]		Vertically Integrated Utilities [Member]	Vertically Integrated Utilities [Member] Vertically Integrated Utilities [Member]	Vertically Integrated Utilities [Member] Other Revenues [Member]		Appalachian Power Co [Member]	Appalachian Power Co [Member] Vertically Integrated Utilities [Member]	Appalachian Power Co [Member] Other Revenues [Member]		AEP Texas Inc. [Member]	AEP Texas Inc. [Member] Transmission and Distribution Utilities [Member]	AEP Texas Inc. [Member] Other Revenues [Member]		AEP Transmission Co [Member]	AEP Transmission Co [Member] Transmission [Member]	AEP Transmission Co [Member] Other Revenues [Member]		AEP Transmission Co [Member] Reconciling Adjustments [Member]	AEP Transmission Co [Member] State Transcos [Member]	AEP Transmission Co [Member] State Transcos [Member] Transmission [Member]	AEP Transmission Co [Member] AEPTCo Parent [Member]		Indiana Michigan Power Co [Member]	Indiana Michigan Power Co [Member] Vertically Integrated Utilities [Member]	Indiana Michigan Power Co [Member] Other Revenues [Member]		Ohio Power Co [Member]	Ohio Power Co [Member] Transmission and Distribution Utilities [Member]	Ohio Power Co [Member] Other Revenues [Member]		Public Service Co Of Oklahoma [Member]	Public Service Co Of Oklahoma [Member] Vertically Integrated Utilities [Member]	Public Service Co Of Oklahoma [Member] Other Revenues [Member]		Southwestern Electric Power Co [Member]	Southwestern Electric Power Co [Member] Vertically Integrated Utilities [Member]	Southwestern Electric Power Co [Member] Other Revenues [Member]		Common Stock [Member]	Common Stock [Member] Appalachian Power Co [Member]	Common Stock [Member] Indiana Michigan Power Co [Member]	Common Stock [Member] Ohio Power Co [Member]	Common Stock [Member] Public Service Co Of Oklahoma [Member]	Common Stock [Member] Southwestern Electric Power Co [Member]	Additional Paid-in Capital [Member]	Additional Paid-in Capital [Member] Appalachian Power Co [Member]	Additional Paid-in Capital [Member] AEP Texas Inc. [Member]	Additional Paid-in Capital [Member] AEP Transmission Co [Member]	Additional Paid-in Capital [Member] Indiana Michigan Power Co [Member]	Additional Paid-in Capital [Member] Ohio Power Co [Member]	Additional Paid-in Capital [Member] Public Service Co Of Oklahoma [Member]	Additional Paid-in Capital [Member] Southwestern Electric Power Co [Member]	Retained Earnings [Member]		Retained Earnings [Member] Appalachian Power Co [Member]	Retained Earnings [Member] AEP Texas Inc. [Member]	Retained Earnings [Member] AEP Transmission Co [Member]	Retained Earnings [Member] Indiana Michigan Power Co [Member]	Retained Earnings [Member] Ohio Power Co [Member]	Retained Earnings [Member] Public Service Co Of Oklahoma [Member]	Retained Earnings [Member] Southwestern Electric Power Co [Member]	Accumulated Other Comprehensive Income [Member]	Accumulated Other Comprehensive Income [Member] Appalachian Power Co [Member]	Accumulated Other Comprehensive Income [Member] AEP Texas Inc. [Member]	Accumulated Other Comprehensive Income [Member] Indiana Michigan Power Co [Member]	Accumulated Other Comprehensive Income [Member] Public Service Co Of Oklahoma [Member]	Accumulated Other Comprehensive Income [Member] Southwestern Electric Power Co [Member]	Noncontrolling Interests [Member]	Noncontrolling Interests [Member] Southwestern Electric Power Co [Member]	Competitive Contracted Renewable Portfolio	Competitive Contracted Renewable Portfolio Noncontrolling Interests [Member]
Beginning Balance at Dec. 31, 2021																																				$ 5,376,100,000																																		$ 2,949,600,000									$ 2,426,500,000
Beginning Balance at Dec. 31, 2021	$ 22,680,200,000																											$ 4,647,900,000				$ 3,594,200,000													$ 2,784,700,000				$ 2,846,300,000				$ 2,291,600,000				$ 3,149,800,000				$ 3,408,700,000	$ 260,400,000	$ 56,600,000	$ 321,200,000	$ 157,200,000	$ 100,000	$ 7,172,600,000	$ 1,828,700,000	$ 1,553,900,000		$ 980,900,000	$ 838,800,000	$ 1,039,000,000	$ 1,092,200,000	$ 11,667,100,000		$ 2,534,400,000	$ 2,046,800,000		$ 1,748,500,000	$ 1,686,300,000	$ 1,095,400,000	$ 2,050,900,000	$ 184,800,000	$ 24,400,000	$ (6,500,000)	$ (1,300,000)	$ 0	$ 6,700,000	$ 247,000,000.0	$ (100,000)
Beginning Balance, Shares at Dec. 31, 2021																																																													524,400,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of Common Stock, Value	809,500,000																																																												$ 2,400,000						807,100,000
Issuance of Common Stock, Shares																																																													400,000
Common Stock Dividends	(398,800,000)																																																																										(395,200,000)	[1]
Common Stock Dividends																												(18,800,000)																	(25,000,000.0)				(15,000,000.0)																												(18,800,000)			(25,000,000.0)	(15,000,000.0)
Common Stock Dividends																																																									(800,000)																																	(3,600,000)	(800,000)
Other Changes in Equity	(16,700,000)																																																																		(15,200,000)								(1,500,000)
Capital Contribution from Member																																																									350,000,000.0																	350,000,000.0
Dividends Paid on Common Stock																																				(40,000,000.0)																																											(40,000,000.0)
Net Income (Loss)																																																																											714,700,000								44,100,000
Net Income (Loss) Attributable to Noncontrolling Interests																																																																																										3,400,000	1,000,000.0
Net Income (Loss)	718,100,000																											120,200,000				69,600,000				155,400,000									89,500,000				83,200,000				5,800,000				45,100,000																				120,200,000	69,600,000	155,400,000	89,500,000	83,200,000	5,800,000
Other Comprehensive Income (Loss)	245,800,000																											(1,300,000)				300,000													300,000												(300,000)																											245,800,000	(1,300,000)	300,000	300,000		(300,000)
Ending Balance at Mar. 31, 2022																																				5,491,500,000																																		2,949,600,000									2,541,900,000
Ending Balance at Mar. 31, 2022	$ 24,038,100,000																											4,748,000,000				3,664,100,000													2,849,500,000				2,914,500,000				2,297,400,000				3,543,800,000				$ 3,411,100,000	260,400,000	56,600,000	321,200,000	157,200,000	100,000	7,964,500,000	1,828,700,000	1,553,900,000		980,900,000	838,800,000	1,039,000,000	1,442,200,000	11,985,100,000		2,635,800,000	2,116,400,000		1,813,000,000	1,754,500,000	1,101,200,000	2,095,000,000	430,600,000	23,100,000	(6,200,000)	(1,000,000.0)	0	6,400,000	246,800,000	100,000
Ending Balance, Shares at Mar. 31, 2022																																																													524,800,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common Stock, Dividends Per Share, Declared	$ 0.78
Beginning Balance at Dec. 31, 2021																																				5,376,100,000																																		2,949,600,000									2,426,500,000
Beginning Balance at Dec. 31, 2021	$ 22,680,200,000																											4,647,900,000				3,594,200,000													2,784,700,000				2,846,300,000				2,291,600,000				3,149,800,000				$ 3,408,700,000	260,400,000	56,600,000	321,200,000	157,200,000	100,000	7,172,600,000	1,828,700,000	1,553,900,000		980,900,000	838,800,000	1,039,000,000	1,092,200,000	11,667,100,000		2,534,400,000	2,046,800,000		1,748,500,000	1,686,300,000	1,095,400,000	2,050,900,000	184,800,000	24,400,000	(6,500,000)	(1,300,000)	0	6,700,000	247,000,000.0	(100,000)
Beginning Balance, Shares at Dec. 31, 2021																																																													524,400,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends Paid on Common Stock																												(37,500,000)								(130,000,000.0)									(70,000,000.0)				(45,000,000.0)				(20,000,000.0)				(57,500,000)
Net Income (Loss)	1,922,900,000																																																								260,200,000
Net Income (Loss) Attributable to Noncontrolling Interests	(700,000)																																																								3,100,000
Net Income (Loss)	1,922,200,000						$ 0			$ 278,100,000				$ (406,200,000)				$ 487,800,000		$ 483,100,000				$ 1,079,400,000				303,100,000				253,200,000				426,600,000				$ 0	$ 426,400,000		$ 200,000	[3]	250,800,000				229,900,000				155,700,000				263,300,000
Other Comprehensive Income (Loss)	290,100,000																											(3,800,000)				800,000													900,000												(1,200,000)
Ending Balance at Sep. 30, 2022																																				5,736,900,000																																		3,013,800,000									2,723,100,000
Ending Balance at Sep. 30, 2022	24,512,300,000																											4,914,000,000				3,850,000,000													2,968,300,000				3,032,200,000				2,430,600,000				3,705,100,000				$ 3,412,500,000	260,400,000	56,600,000	321,200,000	157,200,000	100,000	8,001,000,000	1,833,000,000	1,555,700,000		982,800,000	839,800,000	1,042,300,000	1,445,500,000	12,389,800,000		2,800,000,000	2,300,000,000		1,929,300,000	1,871,200,000	1,231,100,000	2,253,600,000	474,900,000	20,600,000	(5,700,000)	(400,000)	0	5,500,000	234,100,000	400,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Capital Contributions from Parent																												4,300,000				1,800,000				64,200,000									1,900,000				1,000,000.0				3,300,000				353,300,000
Ending Balance, Shares at Sep. 30, 2022																																																													525,000,000.0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Revenue from Contracts with Customers	14,758,400,000	$ 8,416,400,000	$ 4,064,500,000	$ 1,997,000,000	$ 280,500,000		0				$ 1,997,000,000					$ 36,100,000	[2]		$ 244,400,000		$ 4,064,500,000				$ 8,416,400,000				$ 2,370,400,000	$ 11,800,000			$ 1,399,300,000	$ 2,500,000			$ 261,700,000			0		$ 249,500,000	0			$ 1,912,100,000	$ 10,000,000.0			$ 2,656,600,000	$ 6,000,000.0			$ 1,432,900,000	$ 3,700,000			$ 1,703,700,000	$ 1,500,000
Revenues	14,758,400,000				429,400,000	[4],[5]	(1,190,500,000)	$ (6,900,000)	[4],[5]	2,014,300,000		$ 410,500,000	[4],[5]	72,700,000		6,900,000	[4],[5]	1,221,100,000		4,078,600,000		$ 18,600,000	[4],[5]	8,562,200,000		$ 300,000	[4],[5]	2,569,800,000		400,000	[6]	1,404,400,000		0	[6]	1,183,300,000		$ 0	[6]	0	1,183,300,000		0		1,971,600,000		(100,000)	[6]	2,674,200,000		18,600,000	[6]	1,438,700,000		0	[6]	1,748,900,000		0	[6]
Revenues from Related Parties, Net of Provisions for Refund																																				933,800,000
Beginning Balance at Mar. 31, 2022																																				5,491,500,000																																		2,949,600,000									2,541,900,000
Beginning Balance at Mar. 31, 2022	24,038,100,000																											4,748,000,000				3,664,100,000													2,849,500,000				2,914,500,000				2,297,400,000				3,543,800,000				$ 3,411,100,000	260,400,000	56,600,000	321,200,000	157,200,000	100,000	7,964,500,000	1,828,700,000	1,553,900,000		980,900,000	838,800,000	1,039,000,000	1,442,200,000	11,985,100,000		2,635,800,000	2,116,400,000		1,813,000,000	1,754,500,000	1,101,200,000	2,095,000,000	430,600,000	23,100,000	(6,200,000)	(1,000,000.0)	0	6,400,000	246,800,000	100,000
Beginning Balance, Shares at Mar. 31, 2022																																																													524,800,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of Common Stock, Value	3,200,000																																																												$ 900,000						2,300,000
Issuance of Common Stock, Shares																																																													100,000
Common Stock Dividends	(404,700,000)																																																																										(402,600,000)	[1]
Common Stock Dividends																												(18,700,000)																	(25,000,000.0)				(15,000,000.0)								(12,500,000)																				(18,700,000)			(25,000,000.0)	(15,000,000.0)		(12,500,000)
Common Stock Dividends																																																									(700,000)																																	(2,100,000)	(700,000)
Other Changes in Equity	18,800,000																																																																		17,200,000								1,600,000
Capital Contribution from Member																																1,300,000				2,800,000									1,300,000				700,000				2,200,000				2,200,000												1,300,000	2,800,000	1,300,000	700,000	2,200,000	2,200,000
Dividends Paid on Common Stock																																				(50,000,000.0)																																											(50,000,000.0)
Net Income (Loss)																																																																											524,500,000								76,700,000
Net Income (Loss) Attributable to Noncontrolling Interests																																																																																										(3,700,000)	2,100,000
Net Income (Loss)	520,800,000																											90,200,000				90,000,000.0				118,500,000									67,200,000				74,800,000				43,000,000.0				78,800,000																				90,200,000	90,000,000.0	118,500,000	67,200,000	74,800,000	43,000,000.0
Other Comprehensive Income (Loss)	120,800,000																											(1,200,000)				200,000													300,000												(500,000)																											120,800,000	(1,200,000)	200,000	300,000		(500,000)
Ending Balance at Jun. 30, 2022																																				5,562,800,000																																		2,952,400,000									2,610,400,000
Ending Balance at Jun. 30, 2022	$ 24,297,000,000																											4,821,100,000				3,755,600,000													2,893,300,000				2,975,000,000				2,342,600,000				3,611,100,000				$ 3,412,000,000	260,400,000	56,600,000	321,200,000	157,200,000	100,000	7,984,000,000	1,831,500,000	1,555,200,000		982,200,000	839,500,000	1,041,200,000	1,444,400,000	12,108,600,000		2,707,300,000	2,206,400,000		1,855,200,000	1,814,300,000	1,144,200,000	2,159,200,000	551,400,000	21,900,000	(6,000,000.0)	(700,000)	0	5,900,000	241,000,000.0	1,500,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Capital Contributions from Parent																												2,800,000																																								2,800,000
Ending Balance, Shares at Jun. 30, 2022																																																													524,900,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common Stock, Dividends Per Share, Declared	$ 0.78
Issuance of Common Stock, Value	$ 14,500,000																																																												$ 500,000						14,000,000.0
Issuance of Common Stock, Shares																																																													100,000
Common Stock Dividends	(409,000,000.0)																																																				(20,000,000.0)																						(402,500,000)	[1]						(20,000,000.0)
Common Stock Dividends																																													(20,000,000.0)				(15,000,000.0)								(45,000,000.0)																							(20,000,000.0)	(15,000,000.0)		(45,000,000.0)
Common Stock Dividends																																																									(1,100,000)																																	(6,500,000)	(1,100,000)
Other Changes in Equity	3,000,000.0																																																																		3,000,000.0
Capital Contribution from Member																																500,000				61,400,000									600,000				300,000				1,100,000				1,100,000												500,000	61,400,000	600,000	300,000	1,100,000	1,100,000
Dividends Paid on Common Stock																																				(40,000,000.0)																																											(40,000,000.0)
Net Income (Loss)	683,700,000																																																								139,400,000																		683,700,000								139,400,000
Net Income (Loss) Attributable to Noncontrolling Interests	(400,000)																																																								0																																	(400,000)	0
Net Income (Loss)	683,300,000						0			96,200,000				(226,700,000)				171,400,000		165,500,000				476,900,000				92,700,000				93,600,000				152,700,000				0	152,600,000		100,000	[3]	94,100,000				71,900,000				106,900,000				139,400,000																				92,700,000	93,600,000	152,700,000	94,100,000	71,900,000	106,900,000
Other Comprehensive Income (Loss)	(76,500,000)																											(1,300,000)				300,000													300,000												(400,000)																											(76,500,000)	(1,300,000)	300,000	300,000		(400,000)
Ending Balance at Sep. 30, 2022																																				5,736,900,000																																		3,013,800,000									2,723,100,000
Ending Balance at Sep. 30, 2022	$ 24,512,300,000																											4,914,000,000				3,850,000,000													2,968,300,000				3,032,200,000				2,430,600,000				3,705,100,000				$ 3,412,500,000	260,400,000	56,600,000	321,200,000	157,200,000	100,000	8,001,000,000	1,833,000,000	1,555,700,000		982,800,000	839,800,000	1,042,300,000	1,445,500,000	12,389,800,000		2,800,000,000	2,300,000,000		1,929,300,000	1,871,200,000	1,231,100,000	2,253,600,000	474,900,000	20,600,000	(5,700,000)	(400,000)	0	5,500,000	234,100,000	400,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Capital Contributions from Parent																												1,500,000																																								1,500,000
Ending Balance, Shares at Sep. 30, 2022																																																													525,000,000.0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common Stock, Dividends Per Share, Declared	$ 0.78
Revenue from Contracts with Customers	$ 5,526,100,000	3,174,600,000	1,525,500,000	733,100,000	92,900,000		0				733,100,000					11,000,000.0	[2]		81,900,000		1,525,500,000				3,174,600,000				818,400,000	2,900,000			507,700,000	300,000			89,100,000			0		87,200,000	0			695,700,000	4,400,000			1,015,200,000	2,100,000			606,500,000	1,000,000.0			698,800,000	500,000
Revenues	5,526,100,000				128,300,000	[7],[8]	(425,000,000.0)	(2,000,000.0)	[7],[8]	735,400,000		122,800,000	[7],[8]	28,300,000		1,800,000	[7],[8]	430,900,000		1,530,200,000		5,500,000	[7],[8]	3,226,300,000		200,000	[7],[8]	888,900,000		300,000	[9]	508,900,000		0	[9]	418,500,000		0	[9]	0	418,500,000		0		715,400,000		0	[9]	1,021,300,000		5,500,000	[9]	608,200,000		0	[9]	717,500,000		0	[9]
Revenues from Related Parties, Net of Provisions for Refund																																				331,300,000
Beginning Balance at Dec. 31, 2022																																				5,873,000,000																																		3,022,300,000									2,850,700,000
Beginning Balance at Dec. 31, 2022	$ 24,122,400,000																											4,975,400,000				3,904,300,000													3,008,300,000				3,088,100,000				$ 2,419,100,000				3,674,800,000				$ 3,413,100,000	260,400,000	56,600,000	321,200,000	157,200,000	100,000	8,051,000,000	1,828,700,000	1,558,200,000		988,800,000	837,800,000	1,042,600,000	1,442,200,000	12,345,600,000		2,891,100,000	2,354,700,000		1,963,200,000	1,929,100,000	1,218,000,000	2,236,000,000	83,700,000	(4,800,000)	(8,600,000)	(300,000)	1,300,000	(4,200,000)	229,000,000.0	700,000
Beginning Balance, Shares at Dec. 31, 2022	525,099,321																																																				10,482,000								525,100,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of Common Stock, Value	$ 41,100,000																																																												$ 5,100,000						36,000,000.0
Issuance of Common Stock, Shares																																																													800,000
Common Stock Dividends	(431,800,000)																																																																										(428,800,000)	[10]
Common Stock Dividends																																													(31,200,000)								$ (17,500,000)																											(31,200,000)		(17,500,000)
Common Stock Dividends																																																									(1,500,000)																																	(3,000,000.0)	(1,500,000)
Other Changes in Equity	(12,500,000)																																																																		(12,700,000)																							200,000
Capital Contribution from Member																																100,000,000.0				25,000,000.0													50,000,000.0								50,000,000.0												100,000,000.0	25,000,000.0		50,000,000.0		50,000,000.0
Dividends Paid on Common Stock																																				(55,000,000.0)																																											(55,000,000.0)
Net Income (Loss)																																																																											397,000,000.0								40,600,000
Net Income (Loss) Attributable to Noncontrolling Interests																																																																																										3,400,000	1,200,000
Net Income (Loss)	400,400,000																											112,500,000				47,600,000				162,700,000									102,800,000				78,000,000.0				(2,300,000)				41,800,000																				112,500,000	47,600,000	162,700,000	102,800,000	78,000,000.0	(2,300,000)
Other Comprehensive Income (Loss)	(151,800,000)																											(1,000,000.0)				(600,000)													(2,600,000)								(1,500,000)				100,000																											(151,800,000)	(1,000,000.0)	(600,000)	(2,600,000)	(1,500,000)	100,000
Ending Balance at Mar. 31, 2023																																				6,005,700,000																																		3,047,300,000									2,958,400,000
Ending Balance at Mar. 31, 2023	$ 23,967,800,000																											5,086,900,000				4,051,300,000													3,077,300,000				3,216,100,000				2,397,800,000				3,765,200,000				$ 3,418,200,000	260,400,000	56,600,000	321,200,000	157,200,000	100,000	8,074,300,000	1,828,700,000	1,658,200,000		988,800,000	887,800,000	1,042,600,000	1,492,200,000	12,313,800,000		3,003,600,000	2,402,300,000		2,034,800,000	2,007,100,000	1,198,200,000	2,276,600,000	(68,100,000)	(5,800,000)	(9,200,000)	(2,900,000)	(200,000)	(4,100,000)	229,600,000	400,000
Ending Balance, Shares at Mar. 31, 2023																																																													525,900,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common Stock, Dividends Per Share, Declared	$ 0.83
Beginning Balance at Dec. 31, 2022																																				5,873,000,000																																		3,022,300,000									2,850,700,000
Beginning Balance at Dec. 31, 2022	$ 24,122,400,000																											4,975,400,000				3,904,300,000													3,008,300,000				3,088,100,000				$ 2,419,100,000				3,674,800,000				$ 3,413,100,000	260,400,000	56,600,000	321,200,000	157,200,000	100,000	8,051,000,000	1,828,700,000	1,558,200,000		988,800,000	837,800,000	1,042,600,000	1,442,200,000	12,345,600,000		2,891,100,000	2,354,700,000		1,963,200,000	1,929,100,000	1,218,000,000	2,236,000,000	83,700,000	(4,800,000)	(8,600,000)	(300,000)	1,300,000	(4,200,000)	229,000,000.0	700,000
Beginning Balance, Shares at Dec. 31, 2022	525,099,321																																																				10,482,000								525,100,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends Paid on Common Stock																												0								(115,000,000.0)									(137,500,000)				0				$ (35,000,000.0)				(125,000,000.0)
Net Income (Loss)	$ 1,871,900,000																																																								279,100,000
Net Income (Loss) Attributable to Noncontrolling Interests	2,900,000																																																								3,000,000.0
Net Income (Loss)	1,874,800,000						0			(62,200,000)				(209,600,000)				583,600,000		508,400,000				1,054,600,000				247,300,000				282,200,000				517,600,000				0	514,000,000.0		3,600,000	[3]	270,600,000				226,200,000				188,100,000				282,100,000
Other Comprehensive Income (Loss)	(124,200,000)																											(2,900,000)				2,500,000													(2,900,000)												(700,000)
Ending Balance at Sep. 30, 2023																																				6,294,900,000																																		3,041,600,000									3,253,300,000
Ending Balance at Sep. 30, 2023	$ 25,349,600,000																											5,226,300,000				4,710,500,000													3,140,200,000				3,489,300,000				2,568,800,000				3,878,800,000				$ 3,424,300,000	260,400,000	56,600,000	321,200,000	157,200,000	100,000	8,996,400,000	1,835,200,000	2,079,700,000		990,500,000	1,012,800,000	1,040,700,000	1,492,200,000	12,929,500,000		3,138,400,000	2,636,900,000		2,096,300,000	2,155,300,000	1,371,100,000	2,390,100,000	(40,500,000)	(7,700,000)	(6,100,000)	(3,200,000)	(200,000)	(4,900,000)	39,900,000	1,300,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Capital Contributions from Parent																												6,500,000				525,800,000				27,900,000									1,700,000				175,000,000.0				$ 600,000				50,000,000.0
Ending Balance, Shares at Sep. 30, 2023	526,819,992																																																				10,482,000								526,800,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Revenue from Contracts with Customers	$ 14,405,100,000	8,603,400,000	4,321,300,000	1,172,600,000	307,800,000		0				1,172,600,000					35,400,000	[2]		272,400,000		4,321,300,000				8,603,400,000				2,573,000,000	9,800,000			1,438,700,000	2,900,000			274,000,000.0			0		269,200,000	0			1,879,300,000	9,700,000			2,869,300,000	10,300,000			1,529,800,000	5,100,000			1,666,000,000	1,800,000
Revenues	14,405,100,000				(250,200,000)	[11],[12]	(1,416,300,000)	(3,600,000)	[11],[12]	1,225,100,000		(272,800,000)	[11],[12]	119,300,000		4,000,000.0	[11],[12]	1,390,800,000		4,348,500,000		20,000,000.0	[11],[12]	8,737,700,000		2,200,000	[11],[12]	2,776,000,000		100,000	[13]	1,445,300,000		0	[13]	1,349,200,000		0	[13]	0	1,349,200,000		0		1,938,500,000		2,100,000	[13]	2,903,200,000		20,100,000	[13]	$ 1,535,900,000		0	[13]	1,708,500,000		0	[13]
Revenues from Related Parties, Net of Provisions for Refund																																				1,080,000,000
Beginning Balance at Mar. 31, 2023																																				6,005,700,000																																		3,047,300,000									2,958,400,000
Beginning Balance at Mar. 31, 2023	23,967,800,000																											5,086,900,000				4,051,300,000													3,077,300,000				3,216,100,000				2,397,800,000				3,765,200,000				$ 3,418,200,000	260,400,000	56,600,000	321,200,000	157,200,000	100,000	8,074,300,000	1,828,700,000	1,658,200,000		988,800,000	887,800,000	1,042,600,000	1,492,200,000	12,313,800,000		3,003,600,000	2,402,300,000		2,034,800,000	2,007,100,000	1,198,200,000	2,276,600,000	(68,100,000)	(5,800,000)	(9,200,000)	(2,900,000)	(200,000)	(4,100,000)	229,600,000	400,000
Beginning Balance, Shares at Mar. 31, 2023																																																													525,900,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of Common Stock, Value	36,500,000																																																												$ 3,300,000						33,200,000
Issuance of Common Stock, Shares																																																													500,000
Common Stock Dividends	(431,800,000)																																																																										(429,500,000)	[10]
Common Stock Dividends																																													(31,300,000)												(50,000,000.0)																							(31,300,000)			(50,000,000.0)
Common Stock Dividends																																																									(600,000)																																	(2,300,000)	(600,000)
Other Changes in Equity	3,300,000																																																																		3,300,000
Capital Contribution from Member																																175,300,000													100,000				125,000,000.0																				175,300,000		100,000	125,000,000.0
Return of Capital to Parent Equity Statement																																(4,300,000)				(8,600,000)																	(2,500,000)																(4,300,000)	(8,600,000)			(2,500,000)
Dividends Paid on Common Stock																																				(30,000,000.0)																																											(30,000,000.0)
Net Income (Loss)																																																																											521,200,000								81,000,000.0
Net Income (Loss) Attributable to Noncontrolling Interests																																																																																										(5,100,000)	300,000
Net Income (Loss)	516,100,000																											42,900,000				109,100,000				175,700,000									74,800,000				67,700,000				51,000,000.0				81,300,000																				42,900,000	109,100,000	175,700,000	74,800,000	67,700,000	51,000,000.0
Other Comprehensive Income (Loss)	31,700,000																											(1,000,000.0)				3,200,000													(200,000)												(400,000)																											31,700,000	(1,000,000.0)	3,200,000	(200,000)		(400,000)
Ending Balance at Jun. 30, 2023																																				6,142,800,000																																		3,038,700,000									3,104,100,000
Ending Balance at Jun. 30, 2023	$ 24,123,600,000																											5,133,100,000				4,334,600,000													3,120,700,000				3,408,800,000				2,446,300,000				3,795,500,000				$ 3,421,500,000	260,400,000	56,600,000	321,200,000	157,200,000	100,000	8,110,800,000	1,833,000,000	1,829,200,000		988,900,000	1,012,800,000	1,040,100,000	1,492,200,000	12,405,500,000		3,046,500,000	2,511,400,000		2,078,300,000	2,074,800,000	1,249,200,000	2,307,600,000	(36,400,000)	(6,800,000)	(6,000,000.0)	(3,100,000)	(200,000)	(4,500,000)	222,200,000	100,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Capital Contributions from Parent																												4,300,000																																								4,300,000
Ending Balance, Shares at Jun. 30, 2023																																																													526,400,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common Stock, Dividends Per Share, Declared	$ 0.83
Issuance of Common Stock, Value	$ 881,700,000																																																												$ 2,800,000						878,900,000
Issuance of Common Stock, Shares																																																													400,000
Common Stock Dividends	(430,200,000)																																																																										(429,700,000)	[10]
Common Stock Dividends																																													(75,000,000.0)								(17,500,000)				(75,000,000.0)																							(75,000,000.0)		(17,500,000)	(75,000,000.0)
Common Stock Dividends																																																									(300,000)																																	(500,000)	(300,000)
Other Changes in Equity	6,700,000																																																																		6,700,000
Capital Contribution from Member																																250,500,000				2,900,000									1,600,000								600,000																250,500,000	2,900,000	1,600,000		600,000
Dividends Paid on Common Stock																																				(30,000,000.0)																																											(30,000,000.0)
Gain (Loss) on Disposition of Assets																																																																																												$ (186,400,000)	$ (186,400,000)
Net Income (Loss)	953,700,000																																																								157,500,000																		953,700,000								157,500,000
Net Income (Loss) Attributable to Noncontrolling Interests	4,600,000																																																								1,500,000																																	4,600,000	1,500,000
Net Income (Loss)	958,300,000						0			132,800,000				(98,400,000)				203,900,000		206,000,000.0				514,000,000.0				91,900,000				125,500,000				179,200,000				0	178,200,000		1,000,000.0	[3]	93,000,000.0				80,500,000				139,400,000				159,000,000.0																				91,900,000	125,500,000	179,200,000	93,000,000.0	80,500,000	139,400,000
Other Comprehensive Income (Loss)	(4,100,000)																											(900,000)				(100,000)													(100,000)												(400,000)																											(4,100,000)	(900,000)	(100,000)	(100,000)		(400,000)
Ending Balance at Sep. 30, 2023																																				6,294,900,000																																		$ 3,041,600,000									$ 3,253,300,000
Ending Balance at Sep. 30, 2023	$ 25,349,600,000																											5,226,300,000				4,710,500,000													3,140,200,000				3,489,300,000				$ 2,568,800,000				3,878,800,000				$ 3,424,300,000	$ 260,400,000	$ 56,600,000	$ 321,200,000	$ 157,200,000	$ 100,000	$ 8,996,400,000	1,835,200,000	$ 2,079,700,000		$ 990,500,000	$ 1,012,800,000	$ 1,040,700,000	$ 1,492,200,000	$ 12,929,500,000		$ 3,138,400,000	$ 2,636,900,000		$ 2,096,300,000	$ 2,155,300,000	$ 1,371,100,000	$ 2,390,100,000	$ (40,500,000)	$ (7,700,000)	$ (6,100,000)	$ (3,200,000)	$ (200,000)	$ (4,900,000)	$ 39,900,000	$ 1,300,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Capital Contributions from Parent																												2,200,000																																								$ 2,200,000
Ending Balance, Shares at Sep. 30, 2023	526,819,992																																																				10,482,000								526,800,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common Stock, Dividends Per Share, Declared	$ 0.83
Revenue from Contracts with Customers	$ 5,341,700,000	$ 3,158,100,000	$ 1,535,200,000	$ 527,500,000	120,900,000		0				$ 527,500,000					26,900,000	[2]		$ 94,000,000.0		$ 1,535,200,000				$ 3,158,100,000				$ 896,000,000.0	3,300,000			$ 551,600,000	1,800,000			$ 93,800,000			0		$ 92,800,000	0			$ 656,100,000	4,200,000			$ 978,700,000	3,000,000.0			$ 642,600,000	1,400,000			$ 639,800,000	500,000
Revenues	$ 5,341,700,000				$ 8,500,000	[14]	$ (508,400,000)	$ (700,000)	[14]	$ 566,700,000		$ 3,400,000	[14],[15]	$ 57,200,000		$ 800,000	[14]	$ 476,700,000		$ 1,544,100,000		$ 2,800,000	[14]	$ 3,205,400,000		$ 2,200,000	[14]	$ 961,800,000		$ 100,000	[16]	$ 554,600,000		$ 0	[16]	462,700,000		$ 0	[16]	$ 0	$ 462,700,000		$ 0		$ 676,300,000		$ 2,100,000	[16]	$ 989,500,000		$ 3,000,000.0	[16]	$ 644,200,000		$ 0	[16]	$ 654,800,000		$ 0	[16]
Revenues from Related Parties, Net of Provisions for Refund																																				$ 369,900,000

[1] Cash dividends declared per AEP common share were $0.78.

[2] Corporate and Other primarily includes the purchasing of receivables from certain AEP utility subsidiaries. This segment also includes Parent’s guarantee revenue received from affiliates, investment income, interest income, interest expense and other nonallocated costs.

[3] Includes the elimination of AEPTCo Parent’s equity earnings in the State Transcos.

[4] Amounts include affiliated and nonaffiliated revenues

[5] Generation & Marketing includes economic hedge activity.

[6] Amounts include affiliated and nonaffiliated revenues.

[7] Amounts include affiliated and nonaffiliated revenues

[8] Generation & Marketing includes economic hedge activity.

[9] Amounts include affiliated and nonaffiliated revenues.

[10] Cash dividends declared per AEP common share were $0.83.

[11] Amounts include affiliated and nonaffiliated revenues.

[12] Generation & Marketing includes economic hedge activity.

[13] Amounts include affiliated and nonaffiliated revenues.

[14] Amounts include affiliated and nonaffiliated revenues.

[15] Generation & Marketing includes economic hedge activity.

[16] Amounts include affiliated and nonaffiliated revenues.

XML

Condensed Consolidated Balance Sheets - USD ($) $ in Millions		Sep. 30, 2023	Dec. 31, 2022
Current Assets
Cash and Cash Equivalents		$ 353.3	$ 509.4
Restricted Cash		53.8	47.1
Other Temporary Investments		211.0	187.6
Accounts Receivable:
Accounts Receivable and Accrued Unbilled Revenues		976.8	1,145.1
Accrued Unbilled Revenues		270.2	322.9
Pledged Accounts Receivable - AEP Credit		1,299.2	1,207.4
Miscellaneous		77.4	49.7
Allowance for Uncollectible Accounts		(58.6)	(57.1)
Total Accounts Receivable		2,565.0	2,668.0
Fuel		726.8	435.1
Materials and Supplies		993.2	915.1
Risk Management Assets		262.7	348.8
Accrued Tax Benefits		160.3	99.4
Regulatory Asset for Under-Recovered Fuel Costs		1,087.6	1,310.0
Prepayments and Other Current Assets		322.9	255.0
TOTAL CURRENT ASSETS		6,736.6	6,775.5
Property, Plant and Equipment
Generation		24,178.0	25,834.2
Transmission		34,731.0	33,266.9
Distribution		28,444.0	27,138.8
Other Property, Plant and Equipment		6,251.1	5,971.8
Construction Work in Progress		6,394.4	4,809.7
Total Property, Plant and Equipment		99,998.5	97,021.4
Accumulated Depreciation and Amortization		24,177.4	23,682.3
TOTAL PROPERTY, PLANT AND EQUIPMENT - NET		75,821.1	73,339.1
Other Noncurrent Assets
Regulatory Assets		4,607.3	4,762.0
Securitized Assets		365.4	446.0
Spent Nuclear Fuel and Decommissioning Trusts		3,539.7	3,341.2
Goodwill		52.5	52.5
Long-term Risk Management Assets		290.2	284.1
Operating Lease Assets		619.1	645.5
Deferred Charges and Other Noncurrent Assets		3,093.7	3,757.4
TOTAL OTHER NONCURRENT ASSETS		12,567.9	13,288.7
TOTAL ASSETS		95,125.6	93,403.3
Current Liabilities
Accounts Payable		2,258.6	2,670.8
Short-term Debt:
Securitized Debt for Receivables - AEP Credit	[1]	900.0	750.0
Other Short-term Debt		1,830.4	3,362.2
Total Short-term Debt		2,730.4	4,112.2
Long-term Debt Due Within One Year		2,773.6	2,486.4
Risk Management Liabilities		151.5	145.2
Customer Deposits		379.6	408.8
Accrued Taxes		1,201.0	1,714.6
Accrued Interest		485.9	336.5
Obligations Under Operating Leases		117.7	113.6
Other Liabilities, Current		1,179.8	1,278.2
TOTAL CURRENT LIABILITIES		11,278.1	13,266.3
Noncurrent Liabilities
Long-term Debt		36,715.5	34,314.6
Deferred Income Tax Liabilities, Net		9,267.2	8,896.9
Long-term Risk Management Liabilities		278.4	345.2
Regulatory Liabilities and Deferred Investment Tax Credits		7,916.3	8,115.6
Asset Retirement Obligations		2,895.2	2,879.3
Employee Benefits and Pension Obligations		238.3	257.3
Obligations Under Operating Leases		514.6	552.5
Deferred Credits and Other Noncurrent Liabilities		597.3	607.3
TOTAL NONCURRENT LIABILITIES		58,422.8	55,968.7
TOTAL LIABILITIES		69,700.9	69,235.0
Rate Matters
Commitments and Contingencies
Contingently Reedemable Performance Share Awards		75.1	45.9
Total Mezzanine Equity		75.1	45.9
Equity
Common Stock		3,424.3	3,413.1
Paid-in Capital		8,996.4	8,051.0
Retained Earnings		12,929.5	12,345.6
Accumulated Other Comprehensive Income (Loss)		(40.5)	83.7
TOTAL COMMON SHAREHOLDER'S EQUITY		25,309.7	23,893.4
Noncontrolling Interests		39.9	229.0
TOTAL EQUITY		25,349.6	24,122.4
TOTAL LIABILITIES AND EQUITY		$ 95,125.6	$ 93,403.3
Common Stock, No Par Value		$ 6.50	$ 6.50
Common Stock, Shares Authorized		600,000,000	600,000,000
Common Stock, Shares, Issued		526,819,992	525,099,321
Treasury Stock, Shares		1,184,572	11,233,240
Commodity [Member]
Equity
Cross Default Provisions Maximum Third Party Obligation Amount		$ 50.0
Subsidiaries [Member]
Current Assets
Restricted Cash		53.8	$ 47.1
Other Temporary Investments		202.0	182.9
Short-term Debt:
Long-term Debt Due Within One Year		184.4	218.2
Noncurrent Liabilities
Long-term Debt		553.5	755.3
AEP Texas Inc. [Member]
Current Assets
Cash and Cash Equivalents		0.1	0.1
Restricted Cash		46.9	32.7
Accounts Receivable:
Accounts Receivable and Accrued Unbilled Revenues		209.6	150.9
Accrued Unbilled Revenues		106.6	91.4
Miscellaneous		0.7	0.2
Allowance for Uncollectible Accounts		(5.0)	(4.2)
Total Accounts Receivable		332.0	250.2
Materials and Supplies		170.9	138.8
Prepayments and Other Current Assets		25.9	18.2
TOTAL CURRENT ASSETS		624.8	446.9
Property, Plant and Equipment
Transmission		6,579.9	6,301.5
Distribution		5,694.5	5,312.8
Other Property, Plant and Equipment		1,119.6	1,022.8
Construction Work in Progress		1,053.9	805.2
Total Property, Plant and Equipment		14,447.9	13,442.3
Accumulated Depreciation and Amortization		1,857.1	1,760.7
TOTAL PROPERTY, PLANT AND EQUIPMENT - NET		12,590.8	11,681.6
Other Noncurrent Assets
Regulatory Assets		307.7	298.3
Securitized Assets		225.5	286.4
Deferred Charges and Other Noncurrent Assets		208.9	179.0
TOTAL OTHER NONCURRENT ASSETS		742.1	763.7
TOTAL ASSETS		13,957.7	12,892.2
Current Liabilities
Accounts Payable		249.3	331.0
Short-term Debt:
Long-term Debt Due Within One Year		94.9	278.5
Accrued Taxes		139.6	95.5
Accrued Interest		81.4	48.3
Obligations Under Operating Leases		30.2	28.6
Other Liabilities, Current		153.9	130.7
TOTAL CURRENT LIABILITIES		780.8	1,043.8
Noncurrent Liabilities
Long-term Debt		5,831.8	5,379.3
Deferred Income Tax Liabilities, Net		1,220.8	1,144.2
Regulatory Liabilities and Deferred Investment Tax Credits		1,256.7	1,259.6
Obligations Under Operating Leases		54.6	67.8
Deferred Credits and Other Noncurrent Liabilities		102.5	93.2
TOTAL NONCURRENT LIABILITIES		8,466.4	7,944.1
TOTAL LIABILITIES		9,247.2	8,987.9
Rate Matters
Commitments and Contingencies
Equity
Paid-in Capital		2,079.7	1,558.2
Retained Earnings		2,636.9	2,354.7
Accumulated Other Comprehensive Income (Loss)		(6.1)	(8.6)
TOTAL EQUITY		4,710.5	3,904.3
TOTAL LIABILITIES AND EQUITY		13,957.7	12,892.2
AEP Texas Inc. [Member] | Related Party
Current Assets
Advances to Affiliates		49.0	6.9
Accounts Receivable:
Affiliated Companies - Contracts with Customers		20.1	11.9
Current Liabilities
Advances From Affiliates		0.0	96.5
Accounts Payable		31.5	34.7
AEP Texas Inc. [Member] | AEP Texas Transition Funding and Restoration Funding [Member]
Current Assets
Restricted Cash		46.9	32.7
Other Noncurrent Assets
Securitized Assets		225.5	286.4
Short-term Debt:
Long-term Debt Due Within One Year		94.9	93.5
Accrued Interest		2.0	2.2
Noncurrent Liabilities
Long-term Debt		165.1	221.0
AEP Transmission Co [Member]
Current Assets
Cash and Cash Equivalents		0.0	0.0
Accounts Receivable:
Accounts Receivable and Accrued Unbilled Revenues		80.4	46.9
Total Accounts Receivable		203.5	166.4
Materials and Supplies		0.3	10.7
Prepayments and Other Current Assets		4.1	7.2
TOTAL CURRENT ASSETS		298.5	188.7
Property, Plant and Equipment
Transmission		13,140.5	12,335.4
Other Property, Plant and Equipment		497.5	476.8
Construction Work in Progress		1,902.1	1,554.7
Total Property, Plant and Equipment		15,540.1	14,366.9
Accumulated Depreciation and Amortization		1,221.2	1,027.0
TOTAL PROPERTY, PLANT AND EQUIPMENT - NET		14,318.9	13,339.9
Other Noncurrent Assets
Regulatory Assets		4.4	7.2
Deferred Property Taxes		82.2	266.6
Deferred Charges and Other Noncurrent Assets		8.0	11.8
TOTAL OTHER NONCURRENT ASSETS		94.6	285.6
TOTAL ASSETS		14,712.0	13,814.2
Current Liabilities
Accounts Payable		336.1	427.8
Short-term Debt:
Long-term Debt Due Within One Year		60.0	60.0
Accrued Taxes		323.5	529.8
Accrued Interest		56.6	28.8
Obligations Under Operating Leases		1.3	1.3
Other Liabilities, Current		12.8	8.3
TOTAL CURRENT LIABILITIES		1,003.2	1,368.0
Noncurrent Liabilities
Long-term Debt		5,413.7	4,722.8
Deferred Income Tax Liabilities, Net		1,139.1	1,056.5
Regulatory Liabilities and Deferred Investment Tax Credits		784.5	723.3
Obligations Under Operating Leases		1.6	1.5
Deferred Credits and Other Noncurrent Liabilities		75.0	69.1
TOTAL NONCURRENT LIABILITIES		7,413.9	6,573.2
TOTAL LIABILITIES		8,417.1	7,941.2
Rate Matters
Commitments and Contingencies
Equity
Paid-in Captial		3,041.6	3,022.3
Retained Earnings		3,253.3	2,850.7
TOTAL MEMBER'S EQUITY		6,294.9	5,873.0
TOTAL LIABILITIES AND EQUITY		14,712.0	13,814.2
AEP Transmission Co [Member] | Related Party
Current Assets
Advances to Affiliates		90.6	4.4
Accounts Receivable:
Affiliated Companies - Contracts with Customers		123.1	119.5
Current Liabilities
Advances From Affiliates		116.8	229.3
Accounts Payable		96.1	82.7
Appalachian Power Co [Member]
Current Assets
Cash and Cash Equivalents		4.5	7.5
Restricted Cash		6.9	14.4
Accounts Receivable:
Accounts Receivable and Accrued Unbilled Revenues		142.9	168.9
Accrued Unbilled Revenues		41.9	91.3
Miscellaneous		0.2	0.3
Allowance for Uncollectible Accounts		(1.7)	(1.7)
Total Accounts Receivable		275.0	352.8
Fuel		266.5	158.9
Materials and Supplies		137.5	130.6
Risk Management Assets		46.4	69.1
Regulatory Asset for Under-Recovered Fuel Costs		442.0	473.1
Prepayments and Other Current Assets		33.7	33.4
TOTAL CURRENT ASSETS		1,231.8	1,259.6
Property, Plant and Equipment
Generation		6,919.7	6,776.8
Transmission		4,588.4	4,482.8
Distribution		5,126.8	4,933.0
Other Property, Plant and Equipment		933.7	883.3
Construction Work in Progress		877.9	705.3
Total Property, Plant and Equipment		18,446.5	17,781.2
Accumulated Depreciation and Amortization		5,621.4	5,402.0
TOTAL PROPERTY, PLANT AND EQUIPMENT - NET		12,825.1	12,379.2
Other Noncurrent Assets
Regulatory Assets		978.8	1,058.6
Securitized Assets		140.0	159.6
Employee Benefits and Pension Assets		166.5	152.9
Operating Lease Assets		64.9	73.6
Deferred Charges and Other Noncurrent Assets		102.6	138.7
TOTAL OTHER NONCURRENT ASSETS		1,452.8	1,583.4
TOTAL ASSETS		15,509.7	15,222.2
Current Liabilities
Accounts Payable		321.8	451.2
Short-term Debt:
Long-term Debt Due Within One Year		538.8	251.8
Risk Management Liabilities		1.8	3.6
Customer Deposits		77.6	75.1
Accrued Taxes		82.4	101.0
Accrued Interest		85.5	57.9
Obligations Under Operating Leases		14.0	15.0
Other Liabilities, Current		103.3	109.7
TOTAL CURRENT LIABILITIES		1,544.3	1,390.2
Noncurrent Liabilities
Long-term Debt		5,048.5	5,158.7
Deferred Income Tax Liabilities, Net		2,029.6	1,992.2
Regulatory Liabilities and Deferred Investment Tax Credits		1,100.5	1,143.6
Asset Retirement Obligations		423.3	419.2
Employee Benefits and Pension Obligations		34.1	34.2
Obligations Under Operating Leases		51.4	59.1
Deferred Credits and Other Noncurrent Liabilities		51.7	49.6
TOTAL NONCURRENT LIABILITIES		8,739.1	8,856.6
TOTAL LIABILITIES		10,283.4	10,246.8
Rate Matters
Commitments and Contingencies
Equity
Common Stock		260.4	260.4
Paid-in Capital		1,835.2	1,828.7
Retained Earnings		3,138.4	2,891.1
Accumulated Other Comprehensive Income (Loss)		(7.7)	(4.8)
TOTAL EQUITY		5,226.3	4,975.4
TOTAL LIABILITIES AND EQUITY		$ 15,509.7	$ 15,222.2
Common Stock, No Par Value		$ 0	$ 0
Common Stock, Shares Authorized		30,000,000	30,000,000
Common Stock, Shares, Outstanding		13,499,500	13,499,500
Appalachian Power Co [Member] | Related Party
Current Assets
Advances to Affiliates		$ 19.3	$ 19.8
Accounts Receivable:
Affiliated Companies - Contracts with Customers		91.7	94.0
Current Liabilities
Advances From Affiliates		202.5	182.2
Accounts Payable		116.6	142.7
Indiana Michigan Power Co [Member]
Current Assets
Cash and Cash Equivalents		2.7	4.2
Accounts Receivable:
Accounts Receivable and Accrued Unbilled Revenues		46.2	96.6
Accrued Unbilled Revenues		3.9	0.6
Miscellaneous		5.3	4.7
Allowance for Uncollectible Accounts		0.0	(0.1)
Total Accounts Receivable		124.8	205.8
Fuel		78.6	46.5
Materials and Supplies		198.7	188.1
Risk Management Assets		15.8	15.2
Regulatory Asset for Under-Recovered Fuel Costs		13.3	47.1
Prepayments and Other Current Assets		43.9	41.9
TOTAL CURRENT ASSETS		499.0	571.8
Property, Plant and Equipment
Generation		5,608.1	5,585.1
Transmission		1,881.2	1,842.2
Distribution		3,171.8	3,024.7
Other Property, Plant and Equipment		834.3	839.3
Construction Work in Progress		353.2	253.0
Total Property, Plant and Equipment		11,848.6	11,544.3
Accumulated Depreciation and Amortization		4,312.9	4,132.8
TOTAL PROPERTY, PLANT AND EQUIPMENT - NET		7,535.7	7,411.5
Other Noncurrent Assets
Regulatory Assets		377.7	459.6
Spent Nuclear Fuel and Decommissioning Trusts		3,539.7	3,341.2
Operating Lease Assets		56.7	64.3
Deferred Charges and Other Noncurrent Assets		257.7	270.5
TOTAL OTHER NONCURRENT ASSETS		4,231.8	4,135.6
TOTAL ASSETS		12,266.5	12,118.9
Current Liabilities
Accounts Payable		177.6	173.4
Short-term Debt:
Long-term Debt Due Within One Year		61.8	341.8
Customer Deposits		54.6	48.6
Accrued Taxes		77.9	103.2
Accrued Interest		38.7	36.9
Obligations Under Operating Leases		16.8	16.0
Regulatory Liability for Over-Recovered Fuel Costs		19.1	0.0
Other Liabilities, Current		88.5	105.8
TOTAL CURRENT LIABILITIES		624.0	1,197.1
Noncurrent Liabilities
Long-term Debt		3,381.8	2,919.0
Deferred Income Tax Liabilities, Net		1,192.7	1,157.0
Regulatory Liabilities and Deferred Investment Tax Credits		1,758.1	1,702.2
Asset Retirement Obligations		2,083.6	2,027.6
Obligations Under Operating Leases		40.5	48.9
Deferred Credits and Other Noncurrent Liabilities		45.6	58.8
TOTAL NONCURRENT LIABILITIES		8,502.3	7,913.5
TOTAL LIABILITIES		9,126.3	9,110.6
Rate Matters
Commitments and Contingencies
Equity
Common Stock		56.6	56.6
Paid-in Capital		990.5	988.8
Retained Earnings		2,096.3	1,963.2
Accumulated Other Comprehensive Income (Loss)		(3.2)	(0.3)
TOTAL EQUITY		3,140.2	3,008.3
TOTAL LIABILITIES AND EQUITY		$ 12,266.5	$ 12,118.9
Common Stock, No Par Value		$ 0	$ 0
Common Stock, Shares Authorized		2,500,000	2,500,000
Common Stock, Shares, Outstanding		1,400,000	1,400,000
Indiana Michigan Power Co [Member] | Related Party
Current Assets
Advances to Affiliates		$ 21.2	$ 23.0
Accounts Receivable:
Affiliated Companies - Contracts with Customers		69.4	104.0
Current Liabilities
Advances From Affiliates		0.0	249.9
Accounts Payable		89.0	121.5
Indiana Michigan Power Co [Member] | DCC Fuel [Member]
Short-term Debt:
Long-term Debt Due Within One Year		59.5	89.6
Ohio Power Co [Member]
Current Assets
Cash and Cash Equivalents		6.8	9.6
Accounts Receivable:
Accounts Receivable and Accrued Unbilled Revenues		104.1	119.9
Accrued Unbilled Revenues		2.9	17.8
Miscellaneous		1.6	0.1
Allowance for Uncollectible Accounts		0.1	(0.1)
Total Accounts Receivable		238.0	238.6
Materials and Supplies		151.8	109.5
Renewable Energy Credits		19.9	35.0
Prepayments and Other Current Assets		27.2	21.7
TOTAL CURRENT ASSETS		443.7	414.4
Property, Plant and Equipment
Transmission		3,320.1	3,198.6
Distribution		6,718.3	6,450.3
Other Property, Plant and Equipment		1,071.5	1,051.4
Construction Work in Progress		720.6	474.3
Total Property, Plant and Equipment		11,830.5	11,174.6
Accumulated Depreciation and Amortization		2,670.5	2,565.3
TOTAL PROPERTY, PLANT AND EQUIPMENT - NET		9,160.0	8,609.3
Other Noncurrent Assets
Regulatory Assets		413.2	327.3
Operating Lease Assets		68.9	73.8
Deferred Charges and Other Noncurrent Assets		262.7	578.3
TOTAL OTHER NONCURRENT ASSETS		744.8	979.4
TOTAL ASSETS		10,348.5	10,003.1
Current Liabilities
Accounts Payable		308.5	337.3
Short-term Debt:
Long-term Debt Due Within One Year		0.0	0.1
Risk Management Liabilities		5.7	1.8
Customer Deposits		59.2	96.5
Accrued Taxes		370.9	733.1
Obligations Under Operating Leases		13.5	13.5
Other Liabilities, Current		204.7	154.2
TOTAL CURRENT LIABILITIES		1,226.8	1,635.5
Noncurrent Liabilities
Long-term Debt		3,366.2	2,970.2
Deferred Income Tax Liabilities, Net		1,155.5	1,101.1
Long-term Risk Management Liabilities		45.9	37.9
Regulatory Liabilities and Deferred Investment Tax Credits		976.8	1,044.0
Obligations Under Operating Leases		55.6	60.3
Deferred Credits and Other Noncurrent Liabilities		32.4	66.0
TOTAL NONCURRENT LIABILITIES		5,632.4	5,279.5
TOTAL LIABILITIES		6,859.2	6,915.0
Rate Matters
Commitments and Contingencies
Equity
Common Stock		321.2	321.2
Paid-in Capital		1,012.8	837.8
Retained Earnings		2,155.3	1,929.1
TOTAL EQUITY		3,489.3	3,088.1
TOTAL LIABILITIES AND EQUITY		$ 10,348.5	$ 10,003.1
Common Stock, No Par Value		$ 0	$ 0
Common Stock, Shares Authorized		40,000,000	40,000,000
Common Stock, Shares, Outstanding		27,952,473	27,952,473
Ohio Power Co [Member] | Related Party
Accounts Receivable:
Affiliated Companies - Contracts with Customers		$ 129.3	$ 100.9
Current Liabilities
Advances From Affiliates		113.3	172.9
Accounts Payable		151.0	126.1
Public Service Co Of Oklahoma [Member]
Current Assets
Cash and Cash Equivalents		3.7	4.0
Accounts Receivable:
Accounts Receivable and Accrued Unbilled Revenues		78.8	70.1
Miscellaneous		0.5	0.8
Total Accounts Receivable		111.2	123.1
Fuel		20.5	11.6
Materials and Supplies		114.9	111.1
Risk Management Assets		28.2	25.3
Accrued Tax Benefits		61.3	16.1
Regulatory Asset for Under-Recovered Fuel Costs		168.2	178.7
Prepayments and Other Current Assets		35.2	21.6
TOTAL CURRENT ASSETS		552.4	491.5
Property, Plant and Equipment
Generation		2,683.7	2,394.8
Transmission		1,197.1	1,164.4
Distribution		3,357.9	3,216.4
Other Property, Plant and Equipment		498.8	469.3
Construction Work in Progress		337.9	219.3
Total Property, Plant and Equipment		8,075.4	7,464.2
Accumulated Depreciation and Amortization		2,050.3	1,837.7
TOTAL PROPERTY, PLANT AND EQUIPMENT - NET		6,025.1	5,626.5
Other Noncurrent Assets
Regulatory Assets		477.2	653.7
Employee Benefits and Pension Assets		71.4	67.3
Operating Lease Assets		114.0	106.1
Deferred Charges and Other Noncurrent Assets		32.1	20.8
TOTAL OTHER NONCURRENT ASSETS		694.7	847.9
TOTAL ASSETS		7,272.2	6,965.9
Current Liabilities
Accounts Payable		233.3	202.9
Short-term Debt:
Long-term Debt Due Within One Year		0.6	0.5
Customer Deposits		61.0	59.0
Accrued Taxes		64.4	28.7
Accrued Interest		25.9	18.2
Obligations Under Operating Leases		10.7	8.9
Other Liabilities, Current		75.4	83.6
TOTAL CURRENT LIABILITIES		517.4	842.7
Noncurrent Liabilities
Long-term Debt		2,383.6	1,912.3
Deferred Income Tax Liabilities, Net		797.5	788.6
Regulatory Liabilities and Deferred Investment Tax Credits		787.0	809.1
Asset Retirement Obligations		82.3	73.5
Obligations Under Operating Leases		106.6	99.3
Deferred Credits and Other Noncurrent Liabilities		29.0	21.3
TOTAL NONCURRENT LIABILITIES		4,186.0	3,704.1
TOTAL LIABILITIES		4,703.4	4,546.8
Rate Matters
Commitments and Contingencies
Equity
Common Stock		157.2	157.2
Paid-in Capital		1,040.7	1,042.6
Retained Earnings		1,371.1	1,218.0
Accumulated Other Comprehensive Income (Loss)		(0.2)	1.3
TOTAL EQUITY		2,568.8	2,419.1
TOTAL LIABILITIES AND EQUITY		$ 7,272.2	$ 6,965.9
Common Stock, Shares Authorized		11,000,000	11,000,000
Common Stock, Shares, Outstanding		9,013,000	9,013,000
Common Stock, Par or Stated Value Per Share		$ 15	$ 15
Common Stock, Shares, Issued		10,482,000	10,482,000
Public Service Co Of Oklahoma [Member] | Related Party
Current Assets
Advances to Affiliates		$ 9.2	$ 0.0
Accounts Receivable:
Affiliated Companies - Contracts with Customers		31.9	52.2
Current Liabilities
Advances From Affiliates		0.0	364.2
Accounts Payable		46.1	76.7
Southwestern Electric Power Co [Member]
Current Assets
Cash and Cash Equivalents		3.6	88.4
Accounts Receivable:
Accounts Receivable and Accrued Unbilled Revenues		32.9	38.8
Miscellaneous		8.3	10.4
Allowance for Uncollectible Accounts		(0.1)	0.0
Total Accounts Receivable		84.9	114.6
Fuel		94.2	81.3
Materials and Supplies		88.6	92.1
Risk Management Assets		17.1	16.4
Accrued Tax Benefits		78.1	16.5
Regulatory Asset for Under-Recovered Fuel Costs		184.4	353.0
Prepayments and Other Current Assets		38.9	47.8
TOTAL CURRENT ASSETS		592.5	812.2
Property, Plant and Equipment
Generation		4,892.8	5,476.2
Transmission		2,557.0	2,479.8
Distribution		2,769.9	2,659.6
Other Property, Plant and Equipment		801.7	804.4
Construction Work in Progress		598.2	369.5
Total Property, Plant and Equipment		11,619.6	11,789.5
Accumulated Depreciation and Amortization		3,057.1	3,527.3
TOTAL PROPERTY, PLANT AND EQUIPMENT - NET		8,562.5	8,262.2
Other Noncurrent Assets
Regulatory Assets		1,116.9	1,042.4
Deferred Charges and Other Noncurrent Assets		289.2	262.0
TOTAL OTHER NONCURRENT ASSETS		1,406.1	1,304.4
TOTAL ASSETS		10,561.1	10,378.8
Current Liabilities
Accounts Payable		232.1	213.1
Short-term Debt:
Other Short-term Debt		3.9	0.0
Long-term Debt Due Within One Year		0.0	6.2
Customer Deposits		71.5	65.4
Accrued Taxes		123.8	52.8
Accrued Interest		38.3	36.0
Obligations Under Operating Leases		9.4	8.4
Asset Retirement Obligations		43.7	43.7
Other Liabilities, Current		97.0	129.7
TOTAL CURRENT LIABILITIES		699.9	947.7
Noncurrent Liabilities
Long-term Debt		3,646.2	3,385.4
Deferred Income Tax Liabilities, Net		1,162.5	1,089.7
Regulatory Liabilities and Deferred Investment Tax Credits		760.3	825.7
Asset Retirement Obligations		218.1	237.2
Employee Benefits and Pension Obligations		30.5	29.7
Obligations Under Operating Leases		123.8	120.2
Deferred Credits and Other Noncurrent Liabilities		41.0	68.4
TOTAL NONCURRENT LIABILITIES		5,982.4	5,756.3
TOTAL LIABILITIES		6,682.3	6,704.0
Rate Matters
Commitments and Contingencies
Equity
Common Stock		0.1	0.1
Paid-in Capital		1,492.2	1,442.2
Retained Earnings		2,390.1	2,236.0
Accumulated Other Comprehensive Income (Loss)		(4.9)	(4.2)
TOTAL COMMON SHAREHOLDER'S EQUITY		3,877.5	3,674.1
Noncontrolling Interests		1.3	0.7
TOTAL EQUITY		3,878.8	3,674.8
TOTAL LIABILITIES AND EQUITY		$ 10,561.1	$ 10,378.8
Common Stock, No Par Value		$ 18	$ 18
Common Stock, Shares Authorized		3,680	3,680
Common Stock, Shares, Outstanding		3,680	3,680
Southwestern Electric Power Co [Member] | Related Party
Current Assets
Advances to Affiliates		$ 2.7	$ 2.1
Accounts Receivable:
Affiliated Companies - Contracts with Customers		43.8	65.4
Current Liabilities
Advances From Affiliates		48.9	310.7
Accounts Payable		31.3	81.7
Southwestern Electric Power Co [Member] | Sabine Mining Co [Member]
Current Assets
Cash and Cash Equivalents		0.0	84.2
Accounts Receivable:
Fuel		0.0	14.2
Materials and Supplies		3.9	4.2
Property, Plant and Equipment
Other Property, Plant and Equipment		185.0	219.8
Accumulated Depreciation and Amortization		$ 185.0	$ 212.5

[1] Amount of securitized debt for receivables as accounted for under the “Transfers and Servicing” accounting guidance.

XML

Condensed Consolidated Statements of Cash Flows $ in Millions	9 Months Ended
	Sep. 30, 2023 USD ($)	Sep. 30, 2022 USD ($)
Operating Activities
Net Income (Loss)	$ 1,874.8	$ 1,922.2
Adjustments to Reconcile Net Income to Net Cash Flows from (Used for) Operating Activities:
Depreciation and Amortization	2,309.4	2,416.8
Deferred Income Taxes	171.5	16.6
Other Asset Impairment Charges	0.0	24.9
Loss on the Expected/Completed Sale	0.0	24.9
Allowance for Equity Funds Used During Construction	(123.4)	(95.2)
Mark-to-Market of Risk Management Contracts	(82.8)	162.3
Property Taxes	486.1	459.9
Establishment of Regulatory Asset	0.0	(37.0)
Deferred Fuel Over/Under-Recovery, Net	542.8	(148.7)
Change in Other Noncurrent Assets	(396.8)	(6.0)
Change in Other Noncurrent Liabilities	(21.5)	324.0
Changes in Certain Components of Working Capital:
Accounts Receivable, Net	114.0	(495.7)
Fuel, Materials and Supplies	(344.4)	(134.6)
Accounts Payable	(163.0)	369.4
Accrued Taxes, Net	(566.7)	(512.8)
Other Current Assets	(91.5)	41.2
Other Current Liabilities	(144.8)	90.9
Net Cash Flows from (Used for) Operating Activities	3,675.7	4,733.2
Investing Activities
Construction Expenditures	(5,767.1)	(4,748.5)
Purchases of Investment Securities	(2,199.7)	(1,868.2)
Sales of Investment Securities	2,140.1	1,833.4
Acquisitions of Nuclear Fuel	(60.9)	(91.9)
Proceeds from Sale of Property, Plant, and Equipment	1,335.6	215.7
Other Investing Activities	62.5	44.3
Net Cash Flows from (Used for) Investing Activities	(4,643.5)	(5,822.5)
Financing Activities
Issuance of Common Stock	959.3	827.2
Issuance of Long-term Debt	4,017.8	3,428.4
Issuance of Short-term Debt with Original Maturities greater than 90 Days	791.7	271.0
Change in Short-term Debt with Original Maturities less than 90 Days, Net	(1,044.7)	803.4
Retirement of Long-term Debt	(1,353.3)	(1,679.1)
Redemption of Short-term Debt with Original Maturities Greater than 90 Days	(1,128.8)	(986.1)
Principal Payments for Finance Leases Obligations	(53.9)	(120.3)
Dividends Paid on Common Stock	(1,293.8)	(1,212.5)
Other Financing Activities	(75.9)	(116.8)
Net Cash Flows from (Used for) Financing Activities	818.4	1,215.2
Net Increase (Decrease) in Cash and Cash Equivalents	(149.4)	125.9
Cash, Cash Equivalents and Restricted Cash at Beginning of Period	556.5	451.4
Cash and Cash Equivalents at Beginning of Period	509.4
Cash, Cash Equivalents and Restricted Cash at End of Period	407.1	577.3
Cash and Cash Equivalents at End of Period	353.3
Supplementary Information
Cash Paid for Interest, Net of Capitalized Amounts	1,148.7	856.8
Net Cash Paid (Received) for Income Taxes	26.7	104.1
Noncash Acquisitions Under Finance Leases	38.5	22.3
Construction Expenditures Included in Noncurrent Liabilities as of September 30,	975.0	985.8
Acquisition of Nuclear Fuel Included in Current Liabilities as of March 31,	9.5	8.5
Commitment from Bank Conduits to Finance Receivables	750.0
2020 Equity Units [Member]
Financing Activities
Issuance of Common Stock	850.0
Mineral Rights
Adjustments to Reconcile Net Income to Net Cash Flows from (Used for) Operating Activities:
Gain on Sale of Mineral Rights	0.0	(116.3)
Kentucky Power Co [Member]
Adjustments to Reconcile Net Income to Net Cash Flows from (Used for) Operating Activities:
Loss on the Expected/Completed Sale	0.0	263.3
Flat Ridge II
Adjustments to Reconcile Net Income to Net Cash Flows from (Used for) Operating Activities:
Impairment of Equity Method Investment	0.0	188.0
Competitive Contracted Renewable Portfolio
Adjustments to Reconcile Net Income to Net Cash Flows from (Used for) Operating Activities:
Loss on the Expected/Completed Sale	112.0	0.0
Renewable Energy Facilities
Investing Activities
Acquisitions of Assets	(154.0)	(1,207.3)
AEP Texas Inc. [Member]
Operating Activities
Net Income (Loss)	282.2	253.2
Adjustments to Reconcile Net Income to Net Cash Flows from (Used for) Operating Activities:
Depreciation and Amortization	351.5	342.7
Deferred Income Taxes	64.2	35.1
Allowance for Equity Funds Used During Construction	(19.4)	(13.2)
Mark-to-Market of Risk Management Contracts	0.0	(0.2)
Change in Other Noncurrent Assets	(118.0)	(48.4)
Change in Other Noncurrent Liabilities	26.7	49.2
Changes in Certain Components of Working Capital:
Accounts Receivable, Net	(81.8)	(57.5)
Fuel, Materials and Supplies	(32.1)	(39.9)
Accounts Payable	0.7	16.0
Accrued Taxes, Net	39.7	39.4
Other Current Assets	(0.7)	1.0
Other Current Liabilities	(9.9)	12.2
Net Cash Flows from (Used for) Operating Activities	503.1	589.6
Investing Activities
Construction Expenditures	(1,175.1)	(949.8)
Change in Advances to Affiliates, Net	(42.1)	(129.4)
Other Investing Activities	42.2	26.7
Net Cash Flows from (Used for) Investing Activities	(1,175.0)	(1,052.5)
Financing Activities
Capital Contributions from Parent	525.8	1.8
Return of Capital to Parent Cash Flows	(4.3)	0.0
Issuance of Long-term Debt	505.4	1,188.7
Change in Advances from Affiliates, Net	(96.5)	(26.9)
Retirement of Long-term Debt	(240.0)	(678.6)
Principal Payments for Finance Leases Obligations	(5.5)	(5.1)
Other Financing Activities	1.2	0.3
Net Cash Flows from (Used for) Financing Activities	686.1	480.2
Net Increase (Decrease) in Cash and Cash Equivalents	14.2	17.3
Cash, Cash Equivalents and Restricted Cash at Beginning of Period	32.8	30.5
Cash and Cash Equivalents at Beginning of Period	0.1
Cash, Cash Equivalents and Restricted Cash at End of Period	47.0	47.8
Cash and Cash Equivalents at End of Period	0.1
Supplementary Information
Cash Paid for Interest, Net of Capitalized Amounts	135.9	121.1
Net Cash Paid (Received) for Income Taxes	4.3	10.0
Noncash Acquisitions Under Finance Leases	3.7	4.1
Construction Expenditures Included in Current Liabilities as of September 30,	153.6	156.0
AEP Transmission Co [Member]
Operating Activities
Net Income (Loss)	517.6	426.6
Adjustments to Reconcile Net Income to Net Cash Flows from (Used for) Operating Activities:
Depreciation and Amortization	291.2	256.2
Deferred Income Taxes	64.2	60.6
Allowance for Equity Funds Used During Construction	(62.2)	(51.2)
Property Taxes	184.4	170.0
Provision for Refund Affiliated	17.9	65.7
Change in Other Noncurrent Assets	5.8	4.0
Change in Other Noncurrent Liabilities	7.7	55.0
Changes in Certain Components of Working Capital:
Accounts Receivable, Net	(37.1)	(66.4)
Fuel, Materials and Supplies	10.4	(2.4)
Accounts Payable	25.0	53.1
Accrued Taxes, Net	(202.2)	(194.0)
Other Current Assets	(1.0)	(1.2)
Other Current Liabilities	21.7	27.2
Net Cash Flows from (Used for) Operating Activities	825.5	737.5
Investing Activities
Construction Expenditures	(1,224.9)	(1,059.3)
Change in Advances to Affiliates, Net	(86.2)	(84.1)
Other Investing Activities	4.8	(5.3)
Net Cash Flows from (Used for) Investing Activities	(1,306.3)	(1,148.7)
Financing Activities
Capital Contributions from Parent	27.9	64.2
Return of Capital to Parent Cash Flows	(8.6)	0.0
Issuance of Long-term Debt	689.0	540.9
Change in Advances from Affiliates, Net	(112.5)	(63.9)
Dividends Paid on Common Stock	(115.0)	(130.0)
Net Cash Flows from (Used for) Financing Activities	480.8	411.2
Net Increase (Decrease) in Cash and Cash Equivalents	0.0	0.0
Cash and Cash Equivalents at Beginning of Period	0.0	0.0
Cash and Cash Equivalents at End of Period	0.0	0.0
Supplementary Information
Cash Paid for Interest, Net of Capitalized Amounts	116.9	88.6
Net Cash Paid (Received) for Income Taxes	55.0	53.2
Construction Expenditures Included in Current Liabilities as of September 30,	219.2	240.5
Appalachian Power Co [Member]
Operating Activities
Net Income (Loss)	247.3	303.1
Adjustments to Reconcile Net Income to Net Cash Flows from (Used for) Operating Activities:
Depreciation and Amortization	424.8	431.0
Deferred Income Taxes	5.2	70.7
Other Asset Impairment Charges	0.0	24.9
Loss on the Expected/Completed Sale	0.0	24.9
Allowance for Equity Funds Used During Construction	(8.7)	(6.8)
Mark-to-Market of Risk Management Contracts	21.7	(65.6)
Establishment of Regulatory Asset	0.0	(37.0)
Deferred Fuel Over/Under-Recovery, Net	108.2	(400.2)
Change in Other Noncurrent Assets	24.4	(15.2)
Change in Other Noncurrent Liabilities	(29.9)	39.7
Changes in Certain Components of Working Capital:
Accounts Receivable, Net	80.2	68.7
Fuel, Materials and Supplies	(114.0)	(61.7)
Increase (Decrease) in Margin Deposits Outstanding	(3.0)	65.8
Accounts Payable	(129.5)	141.4
Accrued Taxes, Net	(12.4)	(98.9)
Other Current Assets	(3.5)	(4.2)
Other Current Liabilities	(0.6)	42.2
Net Cash Flows from (Used for) Operating Activities	610.2	497.9
Investing Activities
Construction Expenditures	(813.4)	(707.4)
Change in Advances to Affiliates, Net	0.5	(161.3)
Other Investing Activities	(2.9)	34.9
Net Cash Flows from (Used for) Investing Activities	(815.8)	(833.8)
Financing Activities
Capital Contributions from Parent	6.5	4.3
Issuance of Long-term Debt	200.0	698.2
Change in Advances from Affiliates, Net	20.3	(199.3)
Retirement of Long-term Debt	(26.5)	(130.4)
Principal Payments for Finance Leases Obligations	(6.2)	(5.9)
Dividends Paid on Common Stock	0.0	(37.5)
Other Financing Activities	1.0	0.5
Net Cash Flows from (Used for) Financing Activities	195.1	329.9
Net Increase (Decrease) in Cash and Cash Equivalents	(10.5)	(6.0)
Cash, Cash Equivalents and Restricted Cash at Beginning of Period	21.9	20.1
Cash and Cash Equivalents at Beginning of Period	7.5
Cash, Cash Equivalents and Restricted Cash at End of Period	11.4	14.1
Cash and Cash Equivalents at End of Period	4.5
Supplementary Information
Cash Paid for Interest, Net of Capitalized Amounts	166.6	128.3
Net Cash Paid (Received) for Income Taxes	40.3	14.2
Noncash Acquisitions Under Finance Leases	4.1	1.0
Construction Expenditures Included in Current Liabilities as of September 30,	138.7	160.4
Indiana Michigan Power Co [Member]
Operating Activities
Net Income (Loss)	270.6	250.8
Adjustments to Reconcile Net Income to Net Cash Flows from (Used for) Operating Activities:
Depreciation and Amortization	352.9	400.2
Deferred Income Taxes	(16.4)	(15.8)
Amortization (Deferral) of Incremental Nuclear Refueling Outage Expenses, Net	44.3	(35.2)
Allowance for Equity Funds Used During Construction	(6.6)	(7.9)
Mark-to-Market of Risk Management Contracts	(4.7)	(13.2)
Amortization of Nuclear Fuel	75.7	63.1
Deferred Fuel Over/Under-Recovery, Net	52.9	(20.5)
Change in Other Noncurrent Assets	3.1	12.5
Change in Other Noncurrent Liabilities	9.0	42.1
Changes in Certain Components of Working Capital:
Accounts Receivable, Net	82.5	5.3
Fuel, Materials and Supplies	(42.7)	3.1
Accounts Payable	(34.8)	19.6
Accrued Taxes, Net	(25.3)	(17.0)
Other Current Assets	(3.4)	19.3
Other Current Liabilities	(22.7)	(63.6)
Net Cash Flows from (Used for) Operating Activities	734.4	642.8
Investing Activities
Construction Expenditures	(418.4)	(407.4)
Change in Advances to Affiliates, Net	1.8	(1.1)
Purchases of Investment Securities	(2,182.8)	(1,854.8)
Sales of Investment Securities	2,139.3	1,818.4
Acquisitions of Nuclear Fuel	(60.9)	(91.9)
Other Investing Activities	4.9	8.0
Net Cash Flows from (Used for) Investing Activities	(516.1)	(528.8)
Financing Activities
Capital Contributions from Parent	1.7	1.9
Issuance of Long-term Debt	494.8	72.8
Change in Advances from Affiliates, Net	(249.9)	11.6
Retirement of Long-term Debt	(324.1)	(64.5)
Principal Payments for Finance Leases Obligations	(5.4)	(41.6)
Dividends Paid on Common Stock	(137.5)	(70.0)
Other Financing Activities	0.6	0.3
Net Cash Flows from (Used for) Financing Activities	(219.8)	(89.5)
Net Increase (Decrease) in Cash and Cash Equivalents	(1.5)	24.5
Cash and Cash Equivalents at Beginning of Period	4.2	1.3
Cash and Cash Equivalents at End of Period	2.7	25.8
Supplementary Information
Cash Paid for Interest, Net of Capitalized Amounts	100.1	101.6
Net Cash Paid (Received) for Income Taxes	36.2	(4.1)
Noncash Acquisitions Under Finance Leases	3.6	0.8
Construction Expenditures Included in Current Liabilities as of September 30,	70.6	68.1
Acquisition of Nuclear Fuel Included in Current Liabilities as of March 31,	9.5	8.5
Ohio Power Co [Member]
Operating Activities
Net Income (Loss)	226.2	229.9
Adjustments to Reconcile Net Income to Net Cash Flows from (Used for) Operating Activities:
Depreciation and Amortization	224.7	216.9
Deferred Income Taxes	29.4	29.3
Allowance for Equity Funds Used During Construction	(11.3)	(10.3)
Mark-to-Market of Risk Management Contracts	11.6	(49.6)
Property Taxes	282.4	264.7
Change in Other Noncurrent Assets	(95.5)	(19.7)
Change in Other Noncurrent Liabilities	(47.7)	82.5
Changes in Certain Components of Working Capital:
Accounts Receivable, Net	4.3	(27.0)
Fuel, Materials and Supplies	5.3	(11.6)
Accounts Payable	1.8	87.6
Increase (Decrease) in Contract with Customer, Liability	(37.3)	37.4
Accrued Taxes, Net	(367.3)	(344.5)
Other Current Assets	(2.3)	11.3
Other Current Liabilities	0.4	25.7
Net Cash Flows from (Used for) Operating Activities	224.7	522.6
Investing Activities
Construction Expenditures	(769.0)	(600.6)
Change in Advances to Affiliates, Net	0.0	42.0
Other Investing Activities	33.9	21.3
Net Cash Flows from (Used for) Investing Activities	(735.1)	(537.3)
Financing Activities
Capital Contributions from Parent	175.0	1.0
Issuance of Long-term Debt	395.0	0.0
Change in Advances from Affiliates, Net	(59.6)	68.8
Retirement of Long-term Debt	(0.6)	(0.1)
Principal Payments for Finance Leases Obligations	(3.7)	(3.6)
Dividends Paid on Common Stock	0.0	(45.0)
Other Financing Activities	1.5	0.8
Net Cash Flows from (Used for) Financing Activities	507.6	21.9
Net Increase (Decrease) in Cash and Cash Equivalents	(2.8)	7.2
Cash, Cash Equivalents and Restricted Cash at Beginning of Period	9.6	3.0
Cash and Cash Equivalents at Beginning of Period	9.6
Cash, Cash Equivalents and Restricted Cash at End of Period	6.8	10.2
Cash and Cash Equivalents at End of Period	6.8
Supplementary Information
Cash Paid for Interest, Net of Capitalized Amounts	76.5	75.8
Net Cash Paid (Received) for Income Taxes	16.0	24.2
Noncash Acquisitions Under Finance Leases	3.3	2.1
Construction Expenditures Included in Current Liabilities as of September 30,	99.6	108.3
Public Service Co Of Oklahoma [Member]
Operating Activities
Net Income (Loss)	188.1	155.7
Adjustments to Reconcile Net Income to Net Cash Flows from (Used for) Operating Activities:
Depreciation and Amortization	187.8	172.7
Deferred Income Taxes	(13.6)	(20.0)
Mark-to-Market of Risk Management Contracts	(0.2)	(36.1)
Property Taxes	(14.0)	(12.2)
Deferred Fuel Over/Under-Recovery, Net	263.3	454.0
Change in Other Regulatory Assets	(66.1)	3.7
Change in Other Noncurrent Assets	(33.1)	(21.8)
Change in Other Noncurrent Liabilities	11.0	15.8
Changes in Certain Components of Working Capital:
Accounts Receivable, Net	11.9	(66.3)
Fuel, Materials and Supplies	(11.6)	(25.8)
Accounts Payable	(19.5)	150.8
Accrued Taxes, Net	(9.5)	(20.9)
Other Current Assets	(3.0)	(19.2)
Other Current Liabilities	(10.8)	11.0
Net Cash Flows from (Used for) Operating Activities	480.7	741.4
Investing Activities
Construction Expenditures	(401.1)	(322.6)
Change in Advances to Affiliates, Net	(9.2)	0.0
Acquisitions of Assets	(146.0)
Other Investing Activities	8.8	2.9
Net Cash Flows from (Used for) Investing Activities	(547.2)	(869.0)
Financing Activities
Capital Contributions from Parent	0.6	3.3
Return of Capital to Parent Cash Flows	(2.5)	0.0
Issuance of Long-term Debt	469.8	499.7
Change in Advances from Affiliates, Net	(364.2)	151.2
Retirement of Long-term Debt	(0.4)	(500.4)
Principal Payments for Finance Leases Obligations	(2.5)	(2.4)
Dividends Paid on Common Stock	(35.0)	(20.0)
Other Financing Activities	0.4	0.4
Net Cash Flows from (Used for) Financing Activities	66.2	131.8
Net Increase (Decrease) in Cash and Cash Equivalents	(0.3)	4.2
Cash and Cash Equivalents at Beginning of Period	4.0	1.3
Cash and Cash Equivalents at End of Period	3.7	5.5
Supplementary Information
Cash Paid for Interest, Net of Capitalized Amounts	67.4	63.1
Net Cash Paid (Received) for Income Taxes	(1.6)	21.9
Noncash Acquisitions Under Finance Leases	1.9	1.7
Construction Expenditures Included in Current Liabilities as of September 30,	91.0	50.1
Public Service Co Of Oklahoma [Member] | Renewable Energy Facilities
Investing Activities
Acquisitions of Assets	(145.7)	(549.3)
Southwestern Electric Power Co [Member]
Operating Activities
Net Income (Loss)	282.1	263.3
Adjustments to Reconcile Net Income to Net Cash Flows from (Used for) Operating Activities:
Depreciation and Amortization	266.8	251.8
Deferred Income Taxes	44.9	7.5
Allowance for Equity Funds Used During Construction	(7.3)	(3.4)
Mark-to-Market of Risk Management Contracts	1.4	(27.6)
Property Taxes	(24.6)	(22.0)
Deferred Fuel Over/Under-Recovery, Net	134.4	(82.0)
Change in Regulatory Assets	(36.7)	3.1
Change in Other Noncurrent Assets	(10.2)	52.0
Change in Other Noncurrent Liabilities	(26.7)	17.3
Changes in Certain Components of Working Capital:
Accounts Receivable, Net	29.7	(17.9)
Fuel, Materials and Supplies	(12.0)	23.5
Accounts Payable	5.3	78.9
Accrued Taxes, Net	10.8	(1.1)
Other Current Assets	10.4	(12.0)
Other Current Liabilities	(40.6)	(38.1)
Net Cash Flows from (Used for) Operating Activities	627.7	493.3
Investing Activities
Construction Expenditures	(614.1)	(397.0)
Change in Advances to Affiliates, Net	(0.6)	153.8
Acquisitions of Assets	0.0	(658.0)
Other Investing Activities	1.8	3.9
Net Cash Flows from (Used for) Investing Activities	(612.9)	(897.3)
Financing Activities
Capital Contributions from Parent	50.0	353.3
Issuance of Long-term Debt	346.8	0.0
Change in Short-term Debt with Original Maturities less than 90 Days, Net	3.9	0.0
Change in Advances from Affiliates, Net	(261.8)	156.3
Retirement of Long-term Debt	(94.1)	(4.7)
Principal Payments for Finance Leases Obligations	(17.6)	(8.0)
Dividends Paid on Common Stock	(125.0)	(57.5)
Dividends Paid on Common Stock	(2.4)	(2.6)
Other Financing Activities	0.6	0.4
Net Cash Flows from (Used for) Financing Activities	(99.6)	437.2
Net Increase (Decrease) in Cash and Cash Equivalents	(84.8)	33.2
Cash and Cash Equivalents at Beginning of Period	88.4	51.2
Cash and Cash Equivalents at End of Period	3.6	84.4
Supplementary Information
Cash Paid for Interest, Net of Capitalized Amounts	89.8	102.1
Net Cash Paid (Received) for Income Taxes	(23.3)	34.7
Noncash Acquisitions Under Finance Leases	4.6	3.2
Construction Expenditures Included in Current Liabilities as of September 30,	$ 69.0	$ 71.8

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Significant Accounting Matters

9 Months Ended

Sep. 30, 2023

Significant Accounting Matters

SIGNIFICANT ACCOUNTING MATTERS

The disclosures in this note apply to all Registrants unless indicated otherwise.

General

The unaudited condensed financial statements and footnotes were prepared in accordance with GAAP for interim financial information and with the instructions to Form 10-Q and Article 10 of Regulation S-X of the SEC.  Accordingly, they do not include all of the information and footnotes required by GAAP for complete annual financial statements.

In the opinion of management, the unaudited condensed interim financial statements reflect all normal and recurring accruals and adjustments necessary for a fair statement of the net income, financial position and cash flows for the interim periods for each Registrant.  Net income for the three and nine months ended September 30, 2023 is not necessarily indicative of results that may be expected for the year ending December 31, 2023.  The condensed financial statements are unaudited and should be read in conjunction with the audited 2022 financial statements and notes thereto, which are included in the Registrants’ Annual Reports on Form 10-K as filed with the SEC on February 23, 2023.

Earnings Per Share (EPS) (Applies to AEP)

Basic EPS is calculated by dividing net earnings available to common shareholders by the weighted-average number of common shares outstanding during the period.  Diluted EPS is calculated by adjusting the weighted-average outstanding common shares, assuming conversion of all potentially dilutive stock awards.

The following table presents AEP’s basic and diluted EPS calculations included on the statements of income:

	Three Months Ended September 30,
	2023				2022
	(in millions, except per share data)
			$/share				$/share
Earnings Attributable to AEP Common Shareholders	$	953.7			$	683.7
Weighted-Average Number of Basic AEP Common Shares Outstanding	520.5		$	1.83	513.7		$	1.33
Weighted-Average Dilutive Effect of Stock-Based Awards	0.9		—		1.6		—
Weighted-Average Number of Diluted AEP Common Shares Outstanding	521.4		$	1.83	515.3		$	1.33

	Nine Months Ended September 30,
	2023				2022
	(in millions, except per share data)
			$/share				$/share
Earnings Attributable to AEP Common Shareholders	$	1,871.9			$	1,922.9
Weighted-Average Number of Basic AEP Common Shares Outstanding	516.5		$	3.62	511.2		$	3.76
Weighted-Average Dilutive Effect of Stock-Based Awards	1.3		—		1.5		(0.01)
Weighted-Average Number of Diluted AEP Common Shares Outstanding	517.8		$	3.62	512.7		$	3.75

There were no antidilutive shares outstanding as of September 30, 2023 and 2022, respectively.

Restricted Cash (Applies to AEP, AEP Texas and APCo)

Restricted Cash primarily includes funds held by trustees for the payment of securitization bonds.

Reconciliation of Cash, Cash Equivalents and Restricted Cash

The following tables provide a reconciliation of Cash, Cash Equivalents and Restricted Cash reported within the balance sheets that sum to the total of the same amounts shown on the statements of cash flows:

	September 30, 2023
	AEP		AEP Texas		APCo
	(in millions)
Cash and Cash Equivalents	$	353.3	$	0.1	$	4.5
Restricted Cash	53.8		46.9		6.9
Total Cash, Cash Equivalents and Restricted Cash	$	407.1	$	47.0	$	11.4

	December 31, 2022
	AEP		AEP Texas		APCo
	(in millions)
Cash and Cash Equivalents	$	509.4	$	0.1	$	7.5
Restricted Cash	47.1		32.7		14.4
Total Cash, Cash Equivalents and Restricted Cash	$	556.5	$	32.8	$	21.9

Supplementary Information

	Nine Months Ended September 30,
Cash Flow Information	2023		2022
	(in millions)
Cash Paid for:
Interest, Net of Capitalized Amounts	$	1,148.7	$	856.8
Income Taxes	26.7		104.1
Noncash Investing and Financing Activities:
Acquisitions Under Finance Leases	38.5		22.3
Construction Expenditures Included in Current Liabilities as of September 30,	975.0		985.8
Acquisition of Nuclear Fuel Included in Current Liabilities as of September 30,	9.5		8.5
Noncash Increase in Noncurrent Assets from the Sale of the Competitive Contracted Renewables Portfolio	74.7		—

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New Accounting Standards

9 Months Ended

Sep. 30, 2023

New Accounting Standards

NEW ACCOUNTING STANDARDS

The disclosures in this note apply to all Registrants unless indicated otherwise.

During the FASB’s standard-setting process and upon issuance of final standards, management reviews the new accounting literature to determine its relevance, if any, to the Registrants’ business. There are no new standards expected to have a material impact on the Registrants’ financial statements.

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Comprehensive Income

9 Months Ended

Sep. 30, 2023

Comprehensive Income

COMPREHENSIVE INCOME

The disclosures in this note apply to AEP only. The impact of AOCI is not material to the financial statements of the Registrant Subsidiaries.

Presentation of Comprehensive Income

The following tables provide AEP’s components of changes in AOCI and details of reclassifications from AOCI.  The amortization of pension and OPEB AOCI components are included in the computation of net periodic pension and OPEB costs. See Note 7 - Benefit Plans for additional information.

	Cash Flow Hedges				Pension
Three Months Ended September 30, 2023	Commodity		Interest Rate		and OPEB		Total
	(in millions)
Balance in AOCI as of June 30, 2023	$	93.5	$	12.7	$	(142.6)	$	(36.4)
Change in Fair Value Recognized in AOCI, Net of Tax	19.3		(6.9)		—		12.4
Amount of (Gain) Loss Reclassified from AOCI
Purchased Electricity, Fuel and Other Consumables Used for Electric Generation (a)	(15.6)		—		—		(15.6)
Interest Expense (a)	—		(1.3)		—		(1.3)
Amortization of Prior Service Cost (Credit)	—		—		(5.3)		(5.3)
Amortization of Actuarial (Gains) Losses	—		—		1.3		1.3
Reclassifications from AOCI, before Income Tax Benefit	(15.6)		(1.3)		(4.0)		(20.9)
Income Tax Benefit	(3.4)		(0.2)		(0.8)		(4.4)
Reclassifications from AOCI, Net of Income Tax Benefit	(12.2)		(1.1)		(3.2)		(16.5)
Net Current Period Other Comprehensive Income (Loss)	7.1		(8.0)		(3.2)		(4.1)
Balance in AOCI as of September 30, 2023	$	100.6	$	4.7	$	(145.8)	$	(40.5)

	Cash Flow Hedges				Pension
Three Months Ended September 30, 2022	Commodity		Interest Rate		and OPEB		Total
	(in millions)
Balance in AOCI as of June 30, 2022	$	533.6	$	(10.8)	$	28.6	$	551.4
Change in Fair Value Recognized in AOCI, Net of Tax	94.3		7.4		—		101.7
Amount of (Gain) Loss Reclassified from AOCI
Generation & Marketing Revenues (a)	0.2		—		—		0.2
Purchased Electricity, Fuel and Other Consumables Used for Electric Generation (a)	(222.6)		—		—		(222.6)
Interest Expense (a)	—		0.9		—		0.9
Amortization of Prior Service Cost (Credit)	—		—		(6.2)		(6.2)
Amortization of Actuarial (Gains) Losses	—		—		2.2		2.2
Reclassifications from AOCI, before Income Tax (Expense) Benefit	(222.4)		0.9		(4.0)		(225.5)
Income Tax (Expense) Benefit	(46.6)		0.1		(0.8)		(47.3)
Reclassifications from AOCI, Net of Income Tax (Expense) Benefit	(175.8)		0.8		(3.2)		(178.2)
Net Current Period Other Comprehensive Income (Loss)	(81.5)		8.2		(3.2)		(76.5)
Balance in AOCI as of September 30, 2022	$	452.1	$	(2.6)	$	25.4	$	474.9

	Cash Flow Hedges				Pension
Nine Months Ended September 30, 2023	Commodity		Interest Rate		and OPEB		Total
	(in millions)
Balance in AOCI as of December 31, 2022	$	223.5	$	0.3	$	(140.1)	$	83.7
Change in Fair Value Recognized in AOCI, Net of Tax	(170.1)		5.3		(12.9)		(177.7)
Amount of (Gain) Loss Reclassified from AOCI
Purchased Electricity, Fuel and Other Consumables Used for Electric Generation (a)	59.7		—		—		59.7
Interest Expense (a)	—		(1.1)		—		(1.1)
Amortization of Prior Service Cost (Credit)	—		—		(15.9)		(15.9)
Amortization of Actuarial (Gains) Losses	—		—		3.9		3.9
Reclassifications from AOCI, before Income Tax (Expense) Benefit	59.7		(1.1)		(12.0)		46.6
Income Tax (Expense) Benefit	12.5		(0.2)		(2.5)		9.8
Reclassifications from AOCI, Net of Income Tax (Expense) Benefit	47.2		(0.9)		(9.5)		36.8
Reclassifications of KPCo Pension and OPEB Regulatory Assets from AOCI	—		—		21.1		21.1
Income Tax (Expense) Benefit	—		—		4.4		4.4
Reclassifications of KPCo Pension and OPEB Regulatory Assets from AOCI, Net of Income Tax (Expense) Benefit	—		—		16.7		16.7
Net Current Period Other Comprehensive Income (Loss)	(122.9)		4.4		(5.7)		(124.2)
Balance in AOCI as of September 30, 2023	$	100.6	$	4.7	$	(145.8)	$	(40.5)

	Cash Flow Hedges				Pension
Nine Months Ended September 30, 2022	Commodity		Interest Rate		and OPEB		Total
	(in millions)
Balance in AOCI as of December 31, 2021	$	163.7	$	(21.3)	$	42.4	$	184.8
Change in Fair Value Recognized in AOCI, Net of Tax	629.8		16.2		—		646.0
Amount of (Gain) Loss Reclassified from AOCI
Generation & Marketing Revenues (a)	0.2		—		—		0.2
Purchased Electricity, Fuel and Other Consumables Used for Electric Generation (a)	(432.3)		—		—		(432.3)
Interest Expense (a)	—		3.1		—		3.1
Amortization of Prior Service Cost (Credit)	—		—		(16.5)		(16.5)
Amortization of Actuarial (Gains) Losses	—		—		6.4		6.4
Reclassifications from AOCI, before Income Tax (Expense) Benefit	(432.1)		3.1		(10.1)		(439.1)
Income Tax (Expense) Benefit	(90.7)		0.6		(2.1)		(92.2)
Reclassifications from AOCI, Net of Income Tax (Expense) Benefit	(341.4)		2.5		(8.0)		(346.9)
Reclassifications of KPCo Pension and OPEB Regulatory Assets to AOCI	—		—		(11.4)		(11.4)
Income Tax (Expense) Benefit	—		—		(2.4)		(2.4)
Reclassifications of KPCo Pension and OPEB Regulatory Assets to AOCI, Net of Income Tax (Expense) Benefit	—		—		(9.0)		(9.0)
Net Current Period Other Comprehensive Income (Loss)	288.4		18.7		(17.0)		290.1
Balance in AOCI as of September 30, 2022	$	452.1	$	(2.6)	$	25.4	$	474.9

(a)Amounts reclassified to the referenced line item on the statements of income.

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Rate Matters

9 Months Ended

Sep. 30, 2023

Rate Matters

RATE MATTERS

The disclosures in this note apply to all Registrants unless indicated otherwise.

As discussed in the 2022 Annual Report, the Registrants are involved in rate and regulatory proceedings at the FERC and their state commissions. The Rate Matters note within the 2022 Annual Report should be read in conjunction with this report to gain a complete understanding of material rate matters still pending that could impact net income, cash flows and possibly financial condition. The following discusses ratemaking developments in 2023 and updates the 2022 Annual Report.

Coal-Fired Generation Plants (Applies to AEP, PSO and SWEPCo)

Compliance with extensive environmental regulations requires significant capital investment in environmental monitoring, installation of pollution control equipment, emission fees, disposal costs and permits. Management continuously evaluates cost estimates of complying with these regulations which has resulted in, and in the future may result in, a decision to retire coal-fired generating facilities earlier than their currently estimated useful lives.

Management is seeking or will seek regulatory recovery, as necessary, for any net book value remaining when the plants are retired. To the extent the net book value of these generation assets is not deemed recoverable, it could reduce future net income and cash flows and impact financial condition.

Regulated Generating Units that have been Retired

SWEPCo

In December 2021, the Dolet Hills Power Station was retired. As part of the 2020 Texas Base Rate Case, the PUCT authorized recovery of SWEPCo’s Texas jurisdictional share of the Dolet Hills Power Station through 2046, but denied SWEPCo the ability to earn a return on this investment resulting in a disallowance of $12 million in 2021. As part of the 2021 Arkansas Base Rate Case, the APSC authorized recovery of SWEPCo’s Arkansas jurisdictional share of the Dolet Hills Power Station through 2027, but denied SWEPCo the ability to earn a return on this investment resulting in a disallowance of $2 million in the second quarter of 2022. Also, the APSC did not rule on the prudency of the early retirement of the Dolet Hills Power Station, which will be addressed in a future proceeding. As part of the 2020 Louisiana Base Rate Case, the LPSC authorized the recovery of SWEPCo’s Louisiana share of the Dolet Hills Power Station, through a separate rider, through 2032, but did not rule on the prudency of the early retirement of the plant, which is being addressed in a separate proceeding. See “2020 Texas Base Rate Case” and “2020 Louisiana Base Rate Case” sections below for additional information.

In March 2023, the Pirkey Plant was retired. As part of the 2020 Louisiana Base Rate Case, the LPSC authorized the recovery of SWEPCo’s Louisiana jurisdictional share of the Pirkey Plant, through a separate rider, through 2032. As part of the 2021 Arkansas Base Rate Case, the APSC granted SWEPCo regulatory asset treatment. SWEPCo will request recovery including a weighted average cost of capital carrying charge through a future proceeding. In July 2023, Texas ALJs issued a proposal for decision that concluded the decision to retire the Pirkey Plant was prudent. In September 2023, the PUCT rejected the ALJs proposal for decision concluding the retirement of the Pirkey Plant was prudent. In the open meeting, the commissioners expressed their concerns that the analysis in support of SWEPCo’s decision to retire the Pirkey Plant was not robust enough and that SWEPCo should have re-evaluated the decision following Winter Storm Uri. The treatment of the cost of recovery of the Pirkey Plant is expected to be addressed in a future rate case. As of September 30, 2023, the Texas jurisdictional share of the net book value of the Pirkey Plant was $66 million. To the extent any portion of the Texas jurisdictional share of the net book value of the Pirkey Plant is not recoverable, it could reduce future net income and cash flows and impact financial condition.

Regulated Generating Units to be Retired

PSO

In 2014, PSO received final approval from the Federal EPA to close Northeastern Plant, Unit 3, in 2026. The plant was originally scheduled to close in 2040. As a result of the early retirement date, PSO revised the useful life of Northeastern Plant, Unit 3, to the projected retirement date of 2026 and the incremental depreciation is being deferred as a regulatory asset. As part of the 2021 Oklahoma Base Rate Case, PSO will continue to recover Northeastern Plant, Unit 3 through 2040.

SWEPCo

In November 2020, management announced that it will cease using coal at the Welsh Plant in 2028. As a result of the announcement, SWEPCo began recording a regulatory asset for accelerated depreciation.

The table below summarizes the net book value including CWIP, before cost of removal and materials and supplies, as of September 30, 2023, of generating facilities planned for early retirement:

Plant	Net Book Value		Accelerated Depreciation Regulatory Asset		Cost of Removal Regulatory Liability			Projected Retirement Date		Current Authorized Recovery Period	Annual Depreciation (a)
	(dollars in millions)
Northeastern Plant, Unit 3	$	112.5	$	159.5	$	20.4	(b)	2026		(c)	$	15.0
Welsh Plant, Units 1 and 3	368.8		115.5		58.0		(d)	2028	(e)	(f)	38.6

(a)Represents the amount of annual depreciation that has been collected from customers over the prior 12-month period.

(b)Includes Northeastern Plant, Unit 4, which was retired in 2016. Removal of Northeastern Plant, Unit 4, will be performed with the removal of Northeastern Plant, Unit 3, after retirement.

(c)Northeastern Plant, Unit 3 is currently being recovered through 2040.

(d)Includes Welsh Plant, Unit 2, which was retired in 2016. Removal of Welsh Plant, Unit 2, will be performed with the removal of Welsh Plant, Units 1 and 3, after retirement.

(e)Represents projected retirement date of coal assets, units are being evaluated for conversion to natural gas after 2028.

(f)Unit 1 is being recovered through 2027 in the Louisiana jurisdiction and through 2037 in the Arkansas and Texas jurisdictions. Unit 3 is being recovered through 2032 in the Louisiana jurisdiction and through 2042 in the Arkansas and Texas jurisdictions.

Dolet Hills Power Station and Related Fuel Operations (Applies to AEP and SWEPCo)

In December 2021, the Dolet Hills Power Station was retired. While in operation, DHLC provided 100% of the fuel supply to Dolet Hills Power Station.

The remaining book value of Dolet Hills Power Station non-fuel related assets are recoverable by SWEPCo through rate riders. As of September 30, 2023, SWEPCo’s share of the net investment in the Dolet Hills Power Station was $105 million, including materials and supplies, net of cost of removal collected in rates.

Fuel costs incurred by the Dolet Hills Power Station are recoverable by SWEPCo through active fuel clauses and are subject to prudency determinations by the various commissions. After closure of the DHLC mining operations and the Dolet Hills Power Station, additional reclamation and other land-related costs incurred by DHLC and Oxbow will continue to be billed to SWEPCo and included in existing fuel clauses. As of September 30, 2023, SWEPCo had a net under-recovered fuel balance of $91 million, inclusive of costs related to the Dolet Hills Power Station billed by DHLC, but excluding impacts of the February 2021 severe winter weather event.

In March 2021, the LPSC issued an order allowing SWEPCo to recover up to $20 million of fuel costs in 2021 and defer approximately $35 million of additional costs with a recovery period to be determined at a later date. In August 2022, the LPSC staff filed testimony recommending fuel disallowances of $72 million, including denial of recovery of the $35 million deferral, with refunds to customers over five years. In September 2022, SWEPCo filed rebuttal testimony addressing the LPSC staff recommendations and a hearing was held in May 2023.

In March 2021, the APSC approved fuel rates that provide recovery of $20 million for the Arkansas share of the 2021 Dolet Hills Power Station fuel costs over five years through the existing fuel clause.

In June 2023, an unopposed settlement agreement was filed with the PUCT that would provide recovery of $48 million of Oxbow mine related costs through 2035. In September 2023, the PUCT approved the settlement agreement.

If any of these costs are not recoverable, it could reduce future net income and cash flows and impact financial condition.

Pirkey Plant and Related Fuel Operations (Applies to AEP and SWEPCo)

In March 2023, the Pirkey Plant was retired. SWEPCo is recovering, or will seek recovery of, the remaining net book value of Pirkey Plant non-fuel costs. As of September 30, 2023, SWEPCo’s share of the net investment in the Pirkey Plant was $180 million, including materials and supplies, net of cost of removal. See the “Regulated Generating Units that have been Retired” section above for additional information. Fuel costs are recovered through active fuel clauses and are subject to prudency determinations by the various commissions. As of March 31, 2023, SWEPCo fuel deliveries, including billings of all fixed costs, from Sabine ceased. Additionally, as of September 30, 2023, SWEPCo had a net under-recovered fuel balance of $91 million, inclusive of costs related to the Pirkey Plant billed by Sabine, but excluding impacts of the February 2021 severe winter weather event. Remaining operational, reclamation and other land-related costs incurred by Sabine will be billed to SWEPCo and included in existing fuel clauses.

In June 2023, an unopposed settlement agreement was filed with the PUCT that would provide recovery of $33 million of Sabine related fuel costs through 2035. In September 2023, the PUCT approved the settlement agreement.

In July 2023, the LPSC ordered that a separate proceeding be established to review the prudence of the decision to retire the Pirkey Plant, including the costs included in fuel for years starting in 2019 and after.

If any of these costs are not recoverable, it could reduce future net income and cash flows and impact financial condition.

Regulatory Assets Pending Final Regulatory Approval (Applies to all Registrants except AEPTCo)

	AEP
	September 30,		December 31,
	2023		2022
Noncurrent Regulatory Assets	(in millions)
Regulatory Assets Currently Earning a Return
Welsh Plant, Units 1 and 3 Accelerated Depreciation	$	115.5	$	85.6
Pirkey Plant	113.0		116.5
Unrecovered Winter Storm Fuel Costs (a)	101.4		121.7
Dolet Hills Power Station Fuel Costs - Louisiana	34.7		32.0
Texas Mobile Generation Costs (b)	—		17.6
Other Regulatory Assets Pending Final Regulatory Approval	21.0		19.3
Regulatory Assets Currently Not Earning a Return
Storm-Related Costs (c)(d)(e)	385.8		407.2
2020-2022 Virginia Triennial Under-Earnings	37.4		37.9
Plant Retirement Costs – Asset Retirement Obligation Costs	25.9		25.9
Other Regulatory Assets Pending Final Regulatory Approval	51.6		55.6
Total Regulatory Assets Pending Final Regulatory Approval	$	886.3	$	919.3

(a)Includes $37 million and $37 million of unrecovered winter storm fuel costs recorded as a current regulatory asset as of September 30, 2023 and December 31, 2022, respectively. See the “February 2021 Severe Winter Weather Impacts in SPP” section below for additional information.

(b)In October 2023, the PUCT issued an order approving a rider to recover deferred Texas Mobile Generation Costs. Recovery of deferred costs through the new rider is updated annually, subject to Commission review.

(c)In October 2023, the PUCO issued an order approving recovery of $34 million in Ohio storm-related costs.

(d)In April 2023, the LPSC issued an order approving the prudence and future recovery of the Louisiana storm-related regulatory assets. See “2021 Louisiana Storm Cost Filing” section below for additional information.

(e)In June 2023, storms in the Oklahoma, Louisiana and Texas service territories caused power outages and extensive damage resulting in the deferral of $58 million, $29 million and $24 million, respectively. Recovery of these storm costs will be addressed in a future request.

	AEP Texas
	September 30,		December 31,
	2023		2022
Noncurrent Regulatory Assets	(in millions)
Regulatory Assets Currently Earning a Return
Texas Mobile Generation Costs (a)	$	—	$	17.6
Regulatory Assets Currently Not Earning a Return
Storm-Related Costs	35.9		26.7
Vegetation Management Program	5.2		5.2
Texas Retail Electric Provider Bad Debt Expense	4.1		4.1
Other Regulatory Assets Pending Final Regulatory Approval	16.3		13.4
Total Regulatory Assets Pending Final Regulatory Approval	$	61.5	$	67.0

(a)In October 2023, the PUCT issued an order approving a rider to recover deferred Texas Mobile Generation Costs. Recovery of deferred costs through the new rider is updated annually, subject to Commission review.

	APCo
	September 30,		December 31,
	2023		2022
Noncurrent Regulatory Assets	(in millions)
Regulatory Assets Currently Earning a Return
COVID-19 – Virginia	$	7.0	$	7.0
Regulatory Assets Currently Not Earning a Return
Storm-Related Costs - West Virginia	72.2		72.6
2020-2022 Virginia Triennial Under-Earnings	37.4		37.9
Plant Retirement Costs – Asset Retirement Obligation Costs	25.9		25.9
Other Regulatory Assets Pending Final Regulatory Approval	5.9		1.1
Total Regulatory Assets Pending Final Regulatory Approval	$	148.4	$	144.5

	I&M
	September 30,		December 31,
	2023		2022
Noncurrent Regulatory Assets	(in millions)
Regulatory Assets Currently Earning a Return
Other Regulatory Assets Pending Final Regulatory Approval	$	0.2	$	0.1
Regulatory Assets Currently Not Earning a Return
Storm-Related Costs - Indiana	29.4		21.6
Other Regulatory Assets Pending Final Regulatory Approval	2.7		2.0
Total Regulatory Assets Pending Final Regulatory Approval	$	32.3	$	23.7

	OPCo
	September 30,		December 31,
	2023		2022
Noncurrent Regulatory Assets	(in millions)
Regulatory Assets Currently Not Earning a Return
Storm-Related Costs (a)	$	21.2	$	33.8
Total Regulatory Assets Pending Final Regulatory Approval	$	21.2	$	33.8

(a)In October 2023, the PUCO issued an order approving recovery of $34 million in storm-related costs.

	PSO
	September 30,		December 31,
	2023		2022
Noncurrent Regulatory Assets	(in millions)
Regulatory Assets Currently Not Earning a Return
Storm-Related Costs (a)	$	92.8	$	25.5
Other Regulatory Assets Pending Final Regulatory Approval	0.2		0.1
Total Regulatory Assets Pending Final Regulatory Approval	$	93.0	$	25.6

(a)In June 2023, storms caused power outages and extensive damage to the Oklahoma service territory, resulting in the deferral of $58 million. Recovery for these storm costs will be addressed in a future request.

	SWEPCo
	September 30,		December 31,
	2023		2022
Noncurrent Regulatory Assets	(in millions)
Regulatory Assets Currently Earning a Return
Welsh Plant, Units 1 and 3 Accelerated Depreciation	$	115.5	$	85.6
Pirkey Plant	113.0		116.5
Unrecovered Winter Storm Fuel Costs (a)	101.4		121.7
Dolet Hills Power Station Fuel Costs - Louisiana	34.7		32.0
Dolet Hills Power Station	12.0		9.7
Other Regulatory Assets Pending Final Regulatory Approval	1.7		2.5
Regulatory Assets Currently Not Earning a Return
Storm-Related Costs (b)(c)	53.4		151.5
Asset Retirement Obligation - Louisiana	—		11.8
Other Regulatory Assets Pending Final Regulatory Approval	14.8		16.0
Total Regulatory Assets Pending Final Regulatory Approval	$	446.5	$	547.3

(a)Includes $37 million and $37 million of unrecovered winter storm fuel costs recorded as a current regulatory asset as of September 30, 2023 and December 31, 2022, respectively. See the “February 2021 Severe Winter Weather Impacts in SPP” section below for additional information.

(b)In April 2023, the LPSC issued an order approving the prudence and future recovery of the Louisiana storm-related regulatory assets. See “2021 Louisiana Storm Cost Filing” section below for additional information.

(c)In June 2023, additional storms in the Louisiana and Texas service territories caused power outages and extensive damage resulting in the deferral of $29 million and $24 million, respectively. Recovery of these storm costs will be addressed in a future request.

If these costs are ultimately determined not to be recoverable, it could reduce future net income and cash flows and impact financial condition.

AEP Texas Rate Matters (Applies to AEP and AEP Texas)

AEP Texas Interim Transmission and Distribution Rates

Through September 30, 2023, AEP Texas’ cumulative revenues from interim base rate increases that are subject to review is approximately $884 million. A base rate review could result in a refund to customers if AEP Texas incurs a disallowance of the transmission or distribution investment on which an interim increase was based. Management is unable to determine a range of potential losses, if any, that are reasonably possible of occurring. A revenue decrease, including a refund of interim transmission and distribution rates, could reduce future net income and cash flows and impact financial condition. AEP Texas is required to file for a comprehensive rate review no later than April 5, 2024.

APCo and WPCo Rate Matters (Applies to AEP and APCo)

2020-2022 Virginia Triennial Review

In March 2023, APCo submitted its 2020-2022 Virginia triennial review filing and base rate case with the Virginia SCC as required by state law. APCo requested a $213 million annual increase in Virginia base rates based upon a proposed 10.6% return on common equity. The requested annual increase includes $47 million related to vegetation management and a $35 million increase in depreciation expense. The requested increase in depreciation expense reflects, among other things, the impacts of incremental investments made since APCo’s last depreciation study using property balances as of December 31, 2022. Effective January 1, 2023 and in accordance with past Virginia SCC directives, APCo implemented updated Virginia depreciation rates. APCo’s proposed revenue requirement also includes the recovery of certain costs incurred that partially contributed to APCo’s calculated earnings shortfall for the 2020-2022 triennial period. For triennial review periods in which a Virginia utility earns below its authorized ROE band, the utility may file to recover expenses incurred, up to the bottom of the authorized ROE band, related to certain categories of costs, including system restoration costs for severe weather events.

In August 2023, APCo, Virginia Staff and intervening parties reached a settlement agreement that included the following: (a) a $127 million annual increase in Virginia base rates, (b) a 9.5% ROE, (c) updated depreciation rates that reflect a 2040 Amos Plant retirement date, (d) approval of a $50 million regulatory asset, including tax gross-up, to be recovered over three years starting in 2024 related to major storm expenses incurred during the 2020-2022 triennial period when APCo under-earned in Virginia, (e) approval of the revenue requirement impact of net operating loss carryforward related to income taxes and approval of deferral authority for corporate alternative minimum taxes incurred and (f) approval of the revenue requirement impact of an increase in vegetation management costs with certain costs subject to over-/under-recovery accounting.

In September 2023, the hearing examiner issued a report recommending approval of the settlement agreement described above, as filed. The Virginia SCC is expected to issue an order in the fourth quarter of 2023. If any costs included in APCo’s 2020-2022 Virginia triennial review are not approved for recovery, it could reduce future net income and cash flows and impact financial condition.

ENEC (Expanded Net Energy Cost) Filings

In April 2021, APCo and WPCo (the Companies) requested a combined $73 million annual increase in ENEC rates based on a cumulative $55 million ENEC under-recovery as of February 28, 2021 and an $18 million increase in projected ENEC costs for the period September 2021 through August 2022. In September 2021, the WVPSC issued an order approving a $7 million overall increase in ENEC rates, including an approval for recovery of the Companies’ cumulative $55 million ENEC under-recovery balance and a $48 million reduction in projected costs for the period September 2021 through August 2022. Subsequently, the Companies submitted a request for reconsideration of this order, identifying flaws in the WVPSC’s calculation of forecasted future year fuel expense and purchased power costs.

In March 2022, the WVPSC issued an order granting the Companies’ request for reconsideration, in part, and approving $31 million in projected costs for the period September 2021 through August 2022. The order also reopened the 2021 ENEC case to require the Companies to explain the significant growth in the reported under-recovery of ENEC costs and to provide various other information including revised projected costs for the period March 2022 through August 2022. Also, in March 2022, the Companies filed testimony providing the information requested in the WVPSC’s order and requested a $155 million annual increase in ENEC rates effective May 1, 2022. In May 2022, the WVPSC issued an order approving a $93 million overall increase to ENEC rates to recover projected annual ENEC costs. However, the WVPSC stated that actual and projected ENEC costs are still subject to a prudency review.

In April 2022, the Companies submitted their 2022 annual ENEC filing with the WVPSC requesting a $297 million annual increase in ENEC revenues, inclusive of the previously requested $155 million increase, effective September 1, 2022.

In September 2022, following an agreed upon delay in the proceedings of the Companies’ 2022 ENEC case, certain intervenors submitted testimony recommending disallowances of at least $83 million to the Companies’ historical period ENEC under-recovery balance along with proposals to either securitize the Companies’ remaining ENEC balance or defer recovery of this balance beyond the traditional one-year period. West Virginia staff recommended a $13 million increase in ENEC rates pending the outcome of the ENEC prudency review. In February 2023, the WVPSC issued an order stating that the commission will not grant additional rate increases for fuel costs until the WVPSC staff completes its prudency review.

In April 2023, the Companies submitted their 2023 annual ENEC filing with the WVPSC, proposing two alternatives to increase ENEC rates effective September 1, 2023. The first alternative is a $293 million annual increase in ENEC rates comprised of an $89 million increase for current year ENEC expense and a $200 million annual increase for the recovery of the Companies’ February 28, 2023 ENEC under-recovery balances over three years, including debt and equity carrying costs. The second alternative is an $89 million annual increase in ENEC rates with the Companies securitizing approximately $1.9 billion of assets, including: (a) $553 million relating to ENEC under-recoveries as of February 28, 2023, (b) $88 million relating to major storm expense deferrals and (c) $1.2 billion relating to APCo’s West Virginia jurisdictional book values of the Amos and Mountaineer Plants and forecasted CCR and ELG investments at these generating facilities. The Companies continue to reflect ENEC under-recovery balances as current on their balance sheets since management cannot assert whether the WVPSC will approve recovery of ENEC under-recovery balances over a time frame different from the traditional one-year period.

Additionally, in April 2023, the Staff submitted the prudency review prepared by an independent consultant retained by the WVPSC staff of the Companies’ operation of the Amos, Mountaineer and Mitchell coal plants that Staff was directed to conduct by the WVPSC in May 2022 (Consultant’s Report). The Consultant’s Report states the opinion of the consultant that the Companies acted imprudently by not taking steps to achieve a 69% capacity factor at their coal-fired plants and recommends applying a disallowance factor of 52.9% to the Companies’ cumulative, September 30, 2022 ENEC under-recovery balance of approximately $430 million. The Consultant’s Report further states the consultant’s opinion that this disallowance factor could also be utilized in future ENEC filings. Adoption of the Consultant’s Report’s findings by the WVPSC could result in a disallowance of up to $285 million. The Companies disagree with the conclusions and recommendations contained in the Consultant’s Report and a hearing was held with the WVPSC in September 2023.

In August 2023, the Staff and intervenors submitted testimony recommending, among other items: (a) disallowances of up to $262 million of historical ENEC under-recovery balances based on alleged lack of prudence, (b) carrying charges on under-recovered balances ranging from 2% to 4% and (c) the recovery of February 28, 2023 ENEC under-recoveries over a period of time ranging from three to five years. In addition, certain intervenors recommended the rejection of the Companies’ proposed securitization and one intervenor recommended that, no later than January 1, 2024, the Companies dispatch their coal fleet at the lower of actual purchase costs or replacement pricing through at least 2026 and that the Companies share 75% of any off-system sales revenues with customers.

In September 2023, the WVPSC issued an order on the 2023 ENEC filing approving an $89 million annual increase in ENEC surcharge rates for the Companies’ forecasted costs for the period September 2023 through August 2024. An order from the WVPSC on the 2021 and 2022 ENEC cases is expected in the fourth quarter of 2023.

In October 2023, intervening parties submitted reply briefs. One intervening party amended their recommended disallowance to include the Companies’ full $553 million ENEC under-recovery as of February 28, 2023. The other intervening parties’ recommended disallowances remained consistent with testimony submitted in August 2023.

If any deferred ENEC costs are not recoverable, it could reduce future net income and cash flows and impact financial condition.

ETT Rate Matters (Applies to AEP)

ETT Interim Transmission Rates

AEP has a 50% equity ownership interest in ETT. Predominantly all of ETT’s revenues are based on interim rate changes that can be filed twice annually and are subject to review and possible true-up in the next base rate proceeding. Through September 30, 2023, AEP’s share of ETT’s cumulative revenues that are subject to review is approximately $1.6 billion. A base rate review could produce a refund to customers if ETT incurs a disallowance of the transmission investment on which an interim increase was based. A revenue decrease, including a refund of interim transmission rates, could reduce future net income and cash flows and impact financial condition. Management is unable to determine a range of potential losses, if any, that are reasonably possible of occurring. ETT is required to file for a comprehensive rate review no later than February 1, 2025, during which the $1.6 billion of cumulative revenues above will be subject to review.

I&M Rate Matters (Applies to AEP and I&M)

Michigan Power Supply Cost Recovery (PSCR)

In April 2023, I&M received intervenor testimony in I&M’s 2021 PSCR Reconciliation for the 12-month period ending December 31, 2021 recommending disallowances of purchased power costs of $18 million associated with the OVEC Inter-Company Power Agreement (ICPA) and the UPA with AEGCo that were alleged to be above market in applying the MPSC’s Code of Conduct rules. Michigan staff submitted testimony in I&M’s 2021 PSCR Reconciliation with no recommended disallowances for PSCR costs incurred, including those associated with the OVEC ICPA and the AEGCo UPA. Michigan staff also recommended several options to address I&M’s shortfall in achieving Michigan’s annual one percent energy waste reduction savings level, resulting in potential future disallowed costs of up to approximately $14 million. In June 2023, Michigan staff submitted rebuttal testimony to update their calculation of the 2021 market proxy price resulting in a recommended disallowance of approximately $1 million related to the OVEC ICPA. An MPSC order on I&M’s 2021 PSCR Reconciliation is expected in the fourth quarter of 2023. If any PSCR costs are not recoverable, it could reduce future net income and cash flows and impact financial condition.

2023 Indiana Base Rate Case

In August 2023, I&M filed a request with the IURC for a $116 million annual increase in Indiana base rates based upon a 2024 forecasted test year, a proposed 10.5% ROE and a proposed capital structure of 48.8% debt and 51.2% common equity. I&M proposed that the annual increase in base rates be implemented in two steps, with the first increase effective in mid-2024, following an IURC order, and the second increase effective in January 2025. The proposed annual increase includes a $41 million increase related to depreciation expense, driven by increased depreciation rates and increased capital investments, and a $15 million increase related to storm expenses. I&M’s Indiana base case filing requests recovery of certain historical period regulatory asset balances and proposes deferral accounting for certain future investments and tax related issues, including corporate alternative minimum tax expense and PTCs related to the Cook Plant. Intervenor testimony is due November 2023 and a hearing is scheduled for January 2024. If any costs included in this filing are not approved for recovery, it could reduce future net income and cash flows and impact financial condition.

2023 Michigan Base Rate Case

In September 2023, I&M filed a request with the MPSC for a $34 million annual increase in Michigan base rates based upon a 2024 forecasted test year, a proposed 10.5% ROE and a capital structure of 49.4% debt and 50.6% common equity. The proposed annual increase includes an $11 million annual increase in depreciation expense driven by increased capital investment. I&M’s Michigan base case filing requests recovery of certain historical period regulatory asset balances and proposes deferral accounting for certain future investments and tax related issues, including corporate alternative minimum tax expense and PTCs related to the Cook Plant. Intervenor testimony is due January 2024 and a hearing is scheduled for February 2024. If any costs included in this filing are not approved for recovery, it could reduce future net income and cash flows and impact financial condition.

KPCo Rate Matters (Applies to AEP)

Fuel Adjustment Clause (FAC) Purchased Power Limitation

In May 2023, KPCo filed an application seeking authority to defer, for future recovery, approximately $12 million of December 2022 purchased power costs not recoverable through its FAC. This requested deferral accounting authority would have enabled KPCo to pursue securitization of these costs. In June 2023, the KPSC denied KPCo’s request for deferral accounting authority. In July 2023, KPCo appealed this decision to the Kentucky state appellate court.

Also in June 2023, following its order denying KPCo’s request for deferral accounting authority, the KPSC issued an order directing KPCo to show cause why it should not be subject to Kentucky statutory remedies, including fines and penalties, for failure to provide adequate service in its service territory. The KPSC’s show cause order did not make any determination regarding the adequacy of KPCo’s service. In July 2023, KPCo filed a response to the show cause order demonstrating that it has provided adequate service. A hearing is scheduled for the first quarter of 2024.

KPCo is requesting a prudency determination and recovery mechanism for these costs in its 2023 base rate. Unless and until KPCo is granted a recovery mechanism for these purchased power costs from the KPSC it will impact cash flows and financial condition. Additionally, if any fines or penalties are levied against KPCo relating to the show cause order, it could reduce net income and cash flows and impact financial condition.

2023 Kentucky Base Rate and Securitization Case

In June 2023, KPCo filed a request with the KPSC for a $94 million net annual increase in base rates based upon a proposed 9.9% ROE with the increase to be implemented no earlier than January 2024. The filing proposes no changes in depreciation rates and an annual level of storm restoration expense in base rates of approximately $1 million. KPCo also proposed to discontinue tracking of PJM transmission costs through a rider, and to instead collect an annual level of costs through base rates. In addition, KPCo has proposed a rider to recover certain distribution reliability investments and related incremental operation and maintenance expenses. KPCo also requested a prudency determination and recovery mechanism for approximately $16 million of purchased power costs not recoverable through its FAC since its last base case.

In conjunction with its June 2023 filing, KPCo further requested to finance, through the issuance of securitization bonds, approximately $471 million of regulatory assets recorded as of June 2023 including: (a) $289 million of plant retirement costs, (b) $79 million of deferred storm costs related to 2020, 2021, 2022 and 2023 major storms, (c) $52 million of deferred purchased power expenses and (d) $51 million of under-recovered purchased power rider costs. Plant retirement costs and deferred purchased power expenses have been deemed prudent in prior KPSC decisions. KPCo has requested a prudency determination in this proceeding for the deferred storm costs and under-recovered purchase power rider costs since the last base case. Consistent with Kentucky statutory requirements, the present value of the return on accumulated deferred income tax benefits related to plant retirement costs and deferred purchase power expenses were proposed to reduce the amount authorized to be financed through securitization.

In October 2023, various intervenors filed testimony recommending an annual base rate increase of $63 million based on ROEs ranging from 9.3% to 9.7%. Intervenors supported KPCo’s securitization request, but proposed to include certain tax benefits as a reduction to the base rate revenue requirement. Intervenors also supported KPCo’s proposal to discontinue tracking of PJM transmission costs through a rider, and to instead collect an annual level of costs through base rates. Other differences between KPCo’s requested annual base rate increase and the intervenors’ recommendations are primarily due to: (a) proposals to remove certain employee-related expenses from the revenue requirement, (b) opposition to various matters related to accumulated deferred income taxes, including opposition to KPCo’s inclusion of its deferred tax asset associated with net operating loss on a stand-alone tax basis in rate base and a recommendation that KPCo not be permitted to recover a tax-related regulatory asset of approximately $33 million, (c) opposition to recovery of approximately $16 million of purchased power costs not recoverable through its FAC since its last base case and (d) a recommendation that KPCo not earn a return on $42 million of prepaid pension and OPEB assets. In addition, intervenors expressed opposition to KPCo’s proposed rider to recover certain distribution reliability investments and related incremental operation and maintenance expenses. KPCo is scheduled to file rebuttal testimony in November 2023. If any of these costs are not recoverable, it could reduce future net income and cash flows and impact financial condition.

OPCo Rate Matters (Applies to AEP and OPCo)

OVEC Cost Recovery Audits

In December 2021, as part of OVEC cost recovery audits pending before the PUCO, intervenors filed positions claiming that costs incurred by OPCo during the 2018-2019 audit period were imprudent and should be disallowed. In May 2022, intervenors filed for rehearing on the 2016-2017 OVEC cost recovery audit period claiming the PUCO’s April 2022 order to adopt the findings of the audit report were unjust, unlawful and unreasonable for multiple reasons, including the position that OPCo recovered imprudently incurred costs. In June 2022, the PUCO granted rehearing on the 2016-2017 audit period for purposes of further consideration.

In May 2023, as part of the OVEC cost recovery audits pending before the PUCO, intervenors filed positions claiming that costs incurred by OPCo during the 2020 audit period were imprudent and should be disallowed. A hearing is scheduled for the fourth quarter of 2023.

Management disagrees with these claims and is unable to predict the impact of these disputes. If any costs are disallowed or refunds are ordered, it could reduce future net income and cash flows and impact financial condition. See "OVEC" section of Note 17 in the 2022 Annual Report for additional information on AEP and OPCo’s investment in OVEC.

Ohio ESP Filings

In January 2023, OPCo filed an application with the PUCO to approve an ESP that included proposed rate adjustments, proposed new riders and the continuation and modification of certain existing riders, including the DIR, effective June 2024 through May 2030. The proposal includes a return on common equity of 10.65% on capital costs for certain riders. In June 2023, intervenors filed testimony opposing OPCo’s plan for various new riders and modifications to existing riders, including the DIR. In September 2023, OPCo and certain intervenors filed a settlement agreement with the PUCO addressing the ESP application. The settlement included a four year term from June 2024 through May 2028, an ROE of 9.7% and continuation of a number of riders including the DIR subject to revenue caps. An order from the PUCO is expected in the first quarter of 2024. If OPCo is ultimately not permitted to fully collect its ESP rates, it could reduce future net income and cash flows and impact financial condition.

PSO Rate Matters (Applies to AEP and PSO)

2022 Oklahoma Base Rate Case

In November 2022, PSO filed a request with the OCC for a $173 million annual increase in rates based upon a 10.4% ROE with a capital structure of 45.4% debt and 54.6% common equity, net of existing rider revenues and certain incremental renewable facility benefits expected to be provided to customers through riders. The requested annual revenue increase included a $47 million annual depreciation expense increase related to the accelerated depreciation recovery of the Northeastern Plant, Unit 3 through 2026, and a $16 million annual amortization expense increase to recover intangible plant over a 5-year useful life instead of a 10-year useful life. PSO’s request also included recovery of the 154 MW Rock Falls Wind Facility through base rates to aid PSO’s near-term capacity needs and support compliance with SPP’s 2023 increased capacity planning reserve margin requirements. In November 2022, PSO entered into an agreement to acquire the Rock Falls Wind Facility. In February 2023, the FERC approved PSO’s acquisition of the Rock Falls Wind Facility under Section 203 of the Federal Power Act. PSO closed on the acquisition and placed the Rock Falls Wind Facility in-service on March 31, 2023. In addition, PSO requested an annual formula based rate tariff, with an initial one-year pilot term. In the event the requested formula based rate tariff was denied, PSO requested an expanded rider to recover certain distribution investments and related expenses as well as an expanded transmission cost recovery rider.

In March 2023, OCC staff and various intervenors filed testimony supporting net annual revenue changes ranging from a $42 million net decrease to a $49 million net increase based upon ROEs ranging from 8.6% to 9.5%. The difference between PSO’s request and OCC staff and intervenor testimony is primarily due to: (a) rejection of PSO’s request to accelerate the recovery of Northeastern Plant, Unit 3 from its original retirement date of 2040 to its projected retirement date of 2026, (b) rejection of PSO’s request to recover intangible plant over a 5-year useful life instead of a 10-year useful life, (c) recommended disallowance of approximately $9 million in certain distribution plant investments, (d) opposition to inclusion of the Rock Falls Wind Facility revenue requirement in customer rates before PSO’s next base rate case, (e) opposition to PSO’s inclusion of its deferred tax asset associated with net operating loss on a stand-alone tax basis in rate base and (f) lower recommended ROEs and recommendations to use certain hypothetical capital structures. Parties also recommended that the OCC reject PSO’s requested formula based rate, and alternate requests for expanded distribution investment and transmission cost recovery riders.

In May 2023, PSO, OCC staff and certain intervenors filed a contested joint stipulation and settlement agreement with the OCC that includes an annual revenue increase of $50 million, based upon a 9.5% ROE with a capital structure of 45.4% debt and 54.6% common equity, net of existing rider revenues and certain incremental renewable facility benefits expected to be provided to customers through riders. The net annual increase includes recovery of the 154 MW Rock Falls Wind Facility through base rates. Northeastern Plant, Unit 3 will continue to be recovered through 2040 and intangible plant will continue to be recovered over a 10-year useful life. The agreement also provides for certain rider-related items, including: (a) revision to PSO’s Fuel Clause Adjustment Rider to reflect factor updates to occur on a semi-annual basis, (b) approval to defer a weighted average cost of capital carrying charge on PSO’s deferred tax asset associated with net operating loss on a stand-alone tax basis to a regulatory asset and, contingent upon receipt of a supportive private letter ruling from the IRS, approval to collect the deferral through a rider over a 20-month period and (c) approval to implement an expanded rider to recover certain distribution investments for a three-year term, up to a $6 million annual revenue requirement.

In May 2023, a hearing on the merits of the contested joint stipulation and settlement agreement was held at the OCC and PSO implemented an interim annual base rate increase, subject to refund, based upon the contested joint stipulation and settlement agreement. In July 2023, an ALJ report was filed and included recommendations generally consistent with the intervenor testimony. The ALJ report is not binding on the OCC. Through September 30, 2023, PSO’s cumulative revenue from the interim annual base rate increase, subject to refund, is approximately $80 million. A final order is expected in the fourth quarter of 2023. If the OCC modifies the contested joint stipulation and settlement agreement and PSO is required to refund any of the $80 million of revenue recorded subject to refund or any costs are not recoverable, it could reduce future net income and cash flows and impact financial condition.

SWEPCo Rate Matters (Applies to AEP and SWEPCo)

2012 Texas Base Rate Case

In 2012, SWEPCo filed a request with the PUCT to increase annual base rates primarily due to the completion of the Turk Plant. In 2013, the PUCT issued an order affirming the prudence of the Turk Plant but determined that the Turk Plant’s Texas jurisdictional capital cost cap established in a previous Certificate of Convenience and Necessity case also limited SWEPCo’s recovery of AFUDC in addition to limits on its recovery of cash construction costs.

Upon rehearing in 2014, the PUCT reversed its initial ruling and determined that AFUDC was excluded from the Turk Plant’s Texas jurisdictional capital cost cap. As a result, SWEPCo reversed $114 million of a previously recorded regulatory disallowance in 2013. In 2017, the Texas District Court upheld the PUCT’s 2014 order and intervenors filed appeals with the Texas Third Court of Appeals.

In August 2021, the Texas Third Court of Appeals reversed the Texas District Court judgment affirming the PUCT’s order on AFUDC, concluding that the language of the PUCT’s original 2008 order intended to include AFUDC in the Texas jurisdictional capital cost cap, and remanded the case to the PUCT for future proceedings. In November 2021, SWEPCo and the PUCT submitted Petitions for Review with the Texas Supreme Court. In October 2022, the Texas Supreme Court denied the Petitions for Review submitted by SWEPCo and the PUCT. In December 2022, SWEPCo and the PUCT filed requests for rehearing with the Texas Supreme Court. In June 2023, the Texas Supreme Court denied SWEPCo’s request for rehearing and the case was remanded to the PUCT for future proceedings. In October 2023, SWEPCo filed testimony with the PUCT in the remanded proceeding recommending no refund or disallowance.

Management does not believe a disallowance of capitalized Turk Plant costs or a revenue refund is probable as of September 30, 2023. However, if SWEPCo is ultimately unable to recover AFUDC in excess of the Texas jurisdictional capital cost cap, it would be expected to result in a pretax net disallowance ranging from $80 million to $90 million. In addition, if SWEPCo is ultimately unable to recover AFUDC in excess of the Texas jurisdictional cost cap, SWEPCo estimates it may be required to make customer refunds, including interest, ranging from $0 to $200 million related to revenues collected from February 2013 through September 2023 and such determination may reduce SWEPCo’s future revenues by approximately $15 million on an annual basis.

2016 Texas Base Rate Case

In 2016, SWEPCo filed a request with the PUCT for a net increase in Texas annual revenues of $69 million based upon a 10% ROE. In January 2018, the PUCT issued a final order approving a net increase in Texas annual revenues of $50 million based upon a ROE of 9.6%, effective May 2017. The final order also included: (a) approval to recover the Texas jurisdictional share of environmental investments placed in-service, as of June 30, 2016, at various plants, including Welsh Plant, Units 1 and 3, (b) approval of recovery of, but no return on, the Texas jurisdictional share of the net book value of Welsh Plant, Unit 2, (c) approval of $2 million in additional vegetation management expenses and (d) the rejection of SWEPCo’s proposed transmission cost recovery mechanism.

As a result of the final order, in 2017 SWEPCo: (a) recorded an impairment charge of $19 million, which included $7 million associated with the lack of return on Welsh Plant, Unit 2 and $12 million related to other disallowed plant investments, (b) recognized $32 million of additional revenues, for the period of May 2017 through December 2017, that was surcharged to customers in 2018 and (c) recognized an additional $7 million of expenses consisting primarily of depreciation expense and vegetation management expense, offset by the deferral of rate case expense. SWEPCo implemented new rates in February 2018 billings. The $32 million of additional 2017 revenues was collected during 2018. In March 2018, the PUCT clarified and corrected portions of the final order, without changing the overall decision or amounts of the rate change. The order has been appealed by various intervenors related to limiting SWEPCo’s recovery of AFUDC on Turk Plant and recovery of Welsh Plant, Unit 2. If certain parts of the PUCT order are overturned, it could reduce future net income and cash flows and impact financial condition.

2020 Texas Base Rate Case

In October 2020, SWEPCo filed a request with the PUCT for a $105 million annual increase in Texas base rates based upon a proposed 10.35% ROE. The request would move transmission and distribution interim revenues recovered through riders into base rates. Eliminating these riders would result in a net annual requested base rate increase of $90 million primarily due to increased investments. SWEPCo subsequently filed a request with the PUCT lowering the requested annual increase in Texas base rates to $100 million which would result in an $85 million net annual base rate increase after moving the proposed riders to rate base.

In January 2022, the PUCT issued a final order approving an annual revenue increase of $39 million based upon a 9.25% ROE. The order also includes: (a) rates implemented retroactively back to March 18, 2021, (b) $5 million of the proposed increase related to vegetation management, (c) $2 million annually to establish a storm catastrophe reserve and (d) the creation of a rider to recover the Dolet Hills Power Station as if it were in rate base until its retirement at the end of 2021 and starting in 2022 the remaining net book value to be recovered as a regulatory asset through 2046. As a result of the final order, SWEPCo recorded a disallowance of $12 million in 2021 associated with the lack of return on the Dolet Hills Power Station. In February 2022, SWEPCo filed a motion for rehearing with the PUCT challenging several errors in the order, which include challenges of the approved ROE, the denial of a reasonable return or carrying costs on the Dolet Hills Power Station and the calculation of the Texas jurisdictional share of the storm catastrophe reserve. In April 2022, the PUCT denied the motion for rehearing. In May 2022, SWEPCo filed a petition for review with the Texas District Court seeking a judicial review of the several errors challenged in the PUCT’s final order.

2020 Louisiana Base Rate Case

In December 2020, SWEPCo filed a request with the LPSC for a $134 million annual increase in Louisiana base rates based upon a proposed 10.35% ROE. SWEPCo’s requested annual increase includes accelerated depreciation related to the Dolet Hills Power Station, Pirkey Power Plant and Welsh Plant, all of which were or are expected to be retired early. SWEPCo also included recovery of Welsh Plant, Unit 2 over the blended useful life of Welsh Plant, Units 1 and 3. SWEPCo subsequently revised the requested annual increase to $95 million to reflect removing hurricane storm restoration costs from the base case filing, to modify the proposed recovery of the Dolet Hills Power Station and revisions to various proposed amortizations. The hurricane costs have been requested in a separate storm filing. See “2021 Louisiana Storm Cost Filing” below for more information.

In January 2023, the LPSC approved a settlement which provides for an annual revenue increase of $27 million based upon a 9.5% ROE and includes: (a) a $21 million increase in base rates effective February 2023, (b) a $14 million rider to recover costs of the Dolet Hills Power Station and Pirkey Plant including a return, (c) an $8 million reduction in fuel rates, (d) adoption of a 3-year formula rate term subject to an earnings band and (e) the recovery of certain incremental SPP charges net of associated revenue and the Louisiana jurisdictional share of the return on and of projected transmission capital investment outside of the earnings band. The settlement agreement did not rule on the prudency of the early retirement of the Dolet Hills Power Station, which is being addressed in a separate proceeding.

The primary differences between SWEPCo’s requested annual rate increase and the agreed upon settlement increase are primarily due to: (a) a reduction in the requested ROE, (b) recovery of the Dolet Hills Power Station and Pirkey Plant over ten years in a separate rider mechanism as opposed to base rates with accelerated depreciation rates, (c) maintaining existing depreciation rates for Welsh Plant, Units 1 and 3 and (d) the severing of SWEPCo’s proposed adjustment to include a stand-alone NOLC deferred tax asset in rate base.

In January 2023, a hearing was held related to the inclusion of a stand-alone NOLC deferred tax asset in rate base. In September 2023, an order was received from the LPSC directing SWEPCo to seek a private letter ruling from the IRS to address the matter.

2021 Louisiana Storm Cost Filing

In 2020, Hurricanes Laura and Delta caused power outages and extensive damage to the SWEPCo service territories, primarily impacting the Louisiana jurisdiction. Following both hurricanes, the LPSC issued orders allowing Louisiana utilities, including SWEPCo, to establish regulatory assets to track and defer expenses associated with these storms. In February 2021, severe winter weather impacted the Louisiana jurisdiction and in March 2021, the LPSC approved the deferral of incremental storm restoration expenses related to the winter storm. In March 2023, SWEPCo and the LPSC staff filed a joint stipulation and settlement agreement with the LPSC which confirmed the prudency of $150 million of deferred incremental storm restoration expenses. The agreement also authorized an interim carrying charge at a rate of 3.125% until the recovery mechanism is determined in phase two of this proceeding. In April 2023, the LPSC issued an order approving the stipulation and settlement agreement. In July 2023, SWEPCo submitted additional information in phase two of this proceeding to obtain a financing order and prudency review of capital investment.

February 2021 Severe Winter Weather Impacts in SPP

In February 2021, severe winter weather had a significant impact in SPP, resulting in significantly increased market prices for natural gas power plants to meet reliability needs for the SPP electric system. For the time period of February 9, 2021, to February 20, 2021, SWEPCo’s natural gas expenses and purchases of electricity still to be recovered from customers are shown in the table below:

Jurisdiction	September 30, 2023		December 31, 2022		Approved Recovery Period	Approved Carrying Charge
	(in millions)
Arkansas	$	59.4	$	74.9	6 years	(a)
Louisiana	101.4		121.7		(b)	(b)
Texas	108.6		132.4		5 years	1.65%
Total	$	269.4	$	329.0

(a)SWEPCo is permitted to record carrying costs on the unrecovered balance of fuel costs at a weighted-cost of capital approved by the APSC. The APSC will conduct an audit of these costs in 2024. SWEPCo’s direct testimony in support of the costs is due in December 2023.

(b)In March 2021, the LPSC approved a special order granting a temporary modification to the FAC and shortly after SWEPCo began recovery of its Louisiana jurisdictional share of these fuel costs based on a five-year recovery period inclusive of an interim carrying charge equal to the prime rate. The special order states the fuel and purchased power costs incurred will be subject to a future LPSC audit.

If SWEPCo is unable to recover any of the costs relating to the extraordinary fuel and purchases of electricity, or obtain authorization of a reasonable carrying charge on these costs, it could reduce future net income and cash flows and impact financial condition.

FERC Rate Matters

FERC 2019 SPP Transmission Formula Rate Challenge (Applies to AEP, AEPTCo, PSO and SWEPCo)

In May 2021, certain joint customers submitted a formal challenge at the FERC related to the 2020 Annual Update of the 2019 SPP Transmission Formula Rates of the AEP transmission owning subsidiaries within SPP. In March 2022, the FERC issued an order on the formal challenge which ruled in favor of the joint customers on several issues. Management has determined that the result of the order had an immaterial impact to the financial statements of AEP, AEPTCo, PSO and SWEPCo. In November 2022, certain joint customers appealed the FERC decision to the U.S. Court of Appeals for the District of Columbia Circuit.

Independence Energy Connection Project (Applies to AEP)

In 2016, PJM approved the Independence Energy Connection Project (IEC) and included it in its Regional Transmission Expansion Plan to alleviate congestion. Transource Energy has an ownership interest in the IEC, which is located in Maryland and Pennsylvania. In June 2020, the Maryland Public Service Commission approved a Certificate of Public Convenience and Necessity to construct the portion of the IEC in Maryland. In May 2021, the Pennsylvania Public Utility Commission (PAPUC) denied the IEC certificate for siting and construction of the portion in Pennsylvania. Transource Energy appealed the PAPUC ruling in Pennsylvania state court and challenged the ruling before the United States District Court for the Middle District of Pennsylvania. In May 2022, the Pennsylvania state court issued an order affirming the PAPUC decision. The PAPUC decision remains subject to the jurisdiction and review of the United States District Court for the Middle District of Pennsylvania, which had stayed review of the PAPUC decision until the Pennsylvania state court had ordered. The procedural schedule for this case states that a decision by the United States District Court for the Middle of Pennsylvania will not be reached until the second half of 2023.

In September 2021, PJM notified Transource Energy that the IEC was suspended to allow for the regulatory and related appeals process to proceed in an orderly manner without breaching milestone dates in the project agreement. At that time, PJM stated that the IEC has not been cancelled and remains necessary to alleviate congestion. PJM continues to evaluate reliability and market efficiency in the area. As of September 30, 2023, AEP’s share of IEC capital expenditures was approximately $92 million, located in Total Property, Plant and Equipment - Net on AEP’s balance sheets. The FERC has previously granted abandonment benefits for this project, allowing the full recovery of prudently incurred costs if the project is cancelled for reasons outside the control of Transource Energy. If any of the IEC costs are not recoverable, it could reduce future net income and cash flows and impact financial condition.

FERC RTO Incentive Complaint (Applies to AEP, AEPTCo and OPCo)

In February 2022, the OCC filed a complaint against AEPSC, American Transmission Systems, Inc. and Duke Energy Ohio, alleging the 50 basis point RTO incentive included in Ohio Transmission Owners’ respective transmission formula rates is not just and reasonable and therefore should be eliminated on the basis that RTO participation is not voluntary, but rather is required by Ohio law. In March 2022, AEPSC filed a motion to dismiss the OCC’s February 2022 complaint with the FERC on the basis of certain deficiencies, including that the complaint fails to request relief that can be granted under FERC regulations because AEPSC is not a public utility nor does it have a transmission rate on file with the FERC. In December 2022, the FERC issued an order removing the 50 basis point RTO incentive from OPCo and OHTCo transmission formula rates effective the date of the February 2022 complaint filing and directed OPCo and OHTCo to provide refunds, with interest, within sixty days of the date of its order. In January 2023, both AEPSC and the OCC filed requests for rehearing with the FERC. In February 2023, in compliance with the FERC’s December 2022 order, AEPSC submitted a filing to the FERC to update OPCo and OHTCo 2023 transmission formula rates to exclude the 50 basis point RTO incentive and provide refunds with interest. In April 2023, the FERC approved the updated transmission formula rates for OPCo and OHTCo and issued an Order on Rehearing affirming its December 2022 decision. Management expects the December 2022 FERC order to reduce AEP’s pretax income by approximately $20 million on an annual basis. This decision has been appealed to the U.S. Court of Appeals for the Sixth Circuit.

Request to Update AEGCo Depreciation Rates (Applies to AEP and I&M)

In October 2022, AEP, on behalf of AEGCo, submitted proposed revisions to AEGCo’s depreciation rates for its 50% ownership interest in Rockport Plant, Unit 1 and Unit 2, reflected in the UPA between AEGCo and I&M. The proposed depreciation rates for these assets reflect an estimated 2028 retirement date for the Rockport Plant. AEGCo’s previous FERC-approved depreciation rates for Rockport Plant, Unit 1 were based upon a December 31, 2028 estimated retirement date while AEGCo’s previous FERC-approved depreciation rates for Rockport Plant, Unit 2 leasehold improvements were based upon a December 31, 2022 estimated retirement date in conjunction with the termination of the Rockport Plant, Unit 2 lease.

In December 2022, the FERC issued an order approving the proposed AEGCo Rockport depreciation rates effective January 1, 2023, subject to further review and a potential refund. The FERC established a separate proceeding to review: (a) AEGCo’s acquisition value for the Rockport Plant, Unit 2 base generating asset (original cost and accumulated depreciation), (b) the appropriateness of including future capital additions as stated components in proposed depreciation rates, in light of the UPA’s formula rate mechanism, (c) the appropriateness of applying two different depreciation rates to a single asset common to both units and (d) the accounting and regulatory treatment of Rockport Plant, Unit 2 costs of removal and related AROs. In August 2023, AEGCo reached a settlement agreement with the FERC Trial Staff that resolves all issues set for hearing. In September 2023, the settlement agreement was certified to the FERC. An order from the FERC on this settlement agreement is expected in the fourth quarter of 2023. If the FERC finalizes the settlement agreement as proposed, management anticipates the results of the order will not have a material impact on financial condition, results of operations or cash flows.

FERC 2021 PJM and SPP Transmission Formula Rate Challenge (Applies to AEP, AEPTCo, APCo, I&M, PSO and SWEPCo)

In March 2023 and May 2023, certain joint customers submitted a complaint and a formal challenge at the FERC related to the 2022 Annual Update of the 2021 Transmission Formula Rates of the AEP transmission owning subsidiaries within PJM and SPP, respectively. These challenges primarily relate to stand-alone treatment of NOLCs in the transmission formula rates of the AEP transmission owning subsidiaries. AEPSC, on behalf of the AEP transmission owning subsidiaries within PJM and SPP, filed answers to the joint formal challenge and complaint with the FERC in the second quarter of 2023.

The Registrants transitioned to stand-alone treatment of NOLCs in its PJM and SPP transmission formula rates beginning with the 2022 projected transmission revenue requirements and 2021 true-up to actual transmission revenue requirements, and provided notice of this change in informational filings made with the FERC. Stand-alone treatment of the NOLCs for transmission formula rates increased the annual revenue requirements for years 2023, 2022 and 2021 by $60 million, $69 million and $78 million, respectively. Through the third quarter of 2023, the Registrants’ financial statements reflect a provision for refund for certain NOLC revenues billed by PJM and SPP. If the Registrants are required to make refunds as a result of these challenges, it could reduce future net income and cash flows and impact financial condition.

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Commitments, Guarantees and Contingencies

9 Months Ended

Sep. 30, 2023

Commitments, Guarantees and Contingencies

COMMITMENTS, GUARANTEES AND CONTINGENCIES

The disclosures in this note apply to all Registrants unless indicated otherwise.

The Registrants are subject to certain claims and legal actions arising in the ordinary course of business.  In addition, the Registrants’ business activities are subject to extensive governmental regulation related to public health and the environment.  The ultimate outcome of such pending or potential litigation against the Registrants cannot be predicted.  Management accrues contingent liabilities only when management concludes that it is both probable that a liability has been incurred at the date of the financial statements and the amount of loss can be reasonably estimated. When management determines that it is not probable, but rather reasonably possible that a liability has been incurred at the date of the financial statements, management discloses such contingencies and the possible loss or range of loss if such estimate can be made. Any estimated range is based on currently available information and involves elements of judgment and significant uncertainties. Any estimated range of possible loss may not represent the maximum possible loss exposure. Circumstances change over time and actual results may vary significantly from estimates.

For current proceedings not specifically discussed below, management does not anticipate that the liabilities, if any, arising from such proceedings would have a material effect on the financial statements. The Commitments, Guarantees and Contingencies note within the 2022 Annual Report should be read in conjunction with this report.

GUARANTEES

Liabilities for guarantees are recorded in accordance with the accounting guidance for “Guarantees.”  There is no collateral held in relation to any guarantees.  In the event any guarantee is drawn, there is no recourse to third-parties unless specified below.

Letters of Credit (Applies to AEP, AEP Texas, APCo and I&M)

Standby letters of credit are entered into with third-parties.  These letters of credit are issued in the ordinary course of business and cover items such as natural gas and electricity risk management contracts, construction contracts, insurance programs, security deposits and debt service reserves.

AEP has $4 billion and $1 billion revolving credit facilities due in March 2027 and 2025, respectively, under which up to $1.2 billion may be issued as letters of credit on behalf of subsidiaries. As of September 30, 2023, no letters of credit were issued under the revolving credit facility.

An uncommitted facility gives the issuer of the facility the right to accept or decline each request made under the facility.  AEP issues letters of credit on behalf of subsidiaries under six uncommitted facilities totaling $450 million. The Registrants’ maximum future payments for letters of credit issued under the uncommitted facilities as of September 30, 2023 were as follows:

Company	Amount		Maturity
	(in millions)
AEP	$	249.1	October 2023 to September 2024
AEP Texas	1.8		July 2024
APCo	6.3		September 2024
I&M	2.9		September 2024

Indemnifications and Other Guarantees

Contracts

The Registrants enter into certain types of contracts which require indemnifications.  Typically these contracts include, but are not limited to, sale agreements, lease agreements, purchase agreements and financing agreements.  Generally, these agreements may include, but are not limited to, indemnifications around certain tax, contractual and environmental matters.  With respect to sale agreements, exposure generally does not exceed the sale price.  As of September 30, 2023, there were no material liabilities recorded for any indemnifications.

AEPSC conducts power purchase-and-sale activity on behalf of APCo, I&M, KPCo and WPCo, who are jointly and severally liable for activity conducted on their behalf.  AEPSC also conducts power purchase-and-sale activity on behalf of PSO and SWEPCo, who are jointly and severally liable for activity conducted on their behalf.

Master Lease Agreements (Applies to all Registrants except AEPTCo)

The Registrants lease certain equipment under master lease agreements.  Under the lease agreements, the lessor is guaranteed a residual value up to a stated percentage of the equipment cost at the end of the lease term. If the actual fair value of the leased equipment is below the guaranteed residual value at the end of the lease term, the Registrants are committed to pay the difference between the actual fair value and the residual value guarantee.  Historically, at the end of the lease term the fair value has been in excess of the amount guaranteed.  As of September 30, 2023, the maximum potential loss by the Registrants for these lease agreements assuming the fair value of the equipment is zero at the end of the lease term was as follows:

Company	Maximum Potential Loss
	(in millions)
AEP	$	44.8
AEP Texas	10.9
APCo	5.6
I&M	4.2
OPCo	6.9
PSO	4.7
SWEPCo	5.3

ENVIRONMENTAL CONTINGENCIES (Applies to all Registrants except AEPTCo)

The Comprehensive Environmental Response Compensation and Liability Act (Superfund) and State Remediation

By-products from the generation of electricity include materials such as ash, slag, sludge, low-level radioactive waste and SNF.  Coal combustion by-products, which constitute the overwhelming percentage of these materials, are typically treated and deposited in captive disposal facilities or are beneficially utilized.  In addition, the generation plants and transmission and distribution facilities have used asbestos, polychlorinated biphenyls and other hazardous and non-hazardous materials.  The Registrants currently incur costs to dispose of these substances safely. For remediation processes not specifically discussed, management does not anticipate that the liabilities, if any, arising from such remediation processes would have a material effect on the financial statements.

NUCLEAR CONTINGENCIES (Applies to AEP and I&M)

I&M owns and operates the Cook Plant under licenses granted by the Nuclear Regulatory Commission.  I&M has a significant future financial commitment to dispose of SNF and to safely decommission and decontaminate the plant.  The licenses to operate the two nuclear units at the Cook Plant expire in 2034 and 2037.  The operation of a nuclear facility also involves special risks, potential liabilities and specific regulatory and safety requirements.  By agreement, I&M is partially liable, together with all other electric utility companies that own nuclear generation units, for a nuclear power plant incident at any nuclear plant in the U.S. Should a nuclear incident occur at any nuclear power plant in the U.S., the resultant liability could be substantial.

OPERATIONAL CONTINGENCIES

Litigation Related to Ohio House Bill 6 (HB 6)

In 2019, Ohio adopted and implemented HB 6 which benefits OPCo by authorizing rate recovery for certain costs including renewable energy contracts and OVEC’s coal-fired generating units. OPCo engaged in lobbying efforts and provided testimony during the legislative process in connection with HB 6. In July 2020, an investigation led by the U.S. Attorney’s Office resulted in a federal grand jury indictment of an Ohio legislator and associates in connection with an alleged racketeering conspiracy involving the adoption of HB 6. After AEP learned of the criminal allegations against the Ohio legislator and others relating to HB 6, AEP, with assistance from outside advisors, conducted a review of the circumstances surrounding the passage of the bill. Management does not believe that AEP was involved in any wrongful conduct in connection with the passage of HB 6.

In August 2020, an AEP shareholder filed a putative class action lawsuit in the U. S. District Court for the Southern District of Ohio against AEP and certain of its officers for alleged violations of securities laws. In December 2021, the district court issued an opinion and order dismissing the securities litigation complaint with prejudice, determining that the complaint failed to plead any actionable misrepresentations or omissions. The plaintiffs did not appeal the ruling.

In January 2021, an AEP shareholder filed a derivative action in the U.S. District Court for the Southern District of Ohio purporting to assert claims on behalf of AEP against certain AEP officers and directors. In February 2021, a second AEP shareholder filed a similar derivative action in the Court of Common Pleas of Franklin County, Ohio. In April 2021, a third AEP shareholder filed a similar derivative action in the U.S. District Court for the Southern District of Ohio and a fourth AEP shareholder filed a similar derivative action in the Supreme Court for the State of New York, Nassau County. These derivative complaints allege the officers and directors made misrepresentations and omissions similar to those alleged in the putative securities class action lawsuit filed against AEP. The derivative complaints together assert claims for: (a) breach of fiduciary duty, (b) waste of corporate assets, (c) unjust enrichment, (d) breach of duty for insider trading and (e) contribution for violations of sections 10(b) and 21D of the Securities Exchange Act of 1934; and seek monetary damages and changes to AEP’s corporate governance and internal policies among other forms of relief. The court entered a scheduling order in the New York state court derivative action staying the case other than with respect to briefing the motion to dismiss. AEP filed substantive and forum-based motions to dismiss on April 29, 2022. On September 13, 2022, the New York state

court granted the forum-based motion to dismiss with prejudice and the plaintiff subsequently filed a notice of appeal with the New York appellate court. On January 20, 2023, the New York plaintiff filed a motion to intervene in the pending Ohio federal court action and withdrew his appeal in New York. The two derivative actions pending in federal district court in Ohio have been consolidated and the plaintiffs in the consolidated action filed an amended complaint. AEP filed a motion to dismiss the amended complaint and subsequently filed a brief in opposition to the New York plaintiffs’ motion to intervene in the consolidated action in Ohio. On March 20, 2023, the federal district court issued an order granting the motion to dismiss with prejudice and denying the New York plaintiffs’ motion to intervene. On April 20, 2023, one of the plaintiffs filed a notice of appeal to the U.S. Court of Appeals for the Sixth Circuit of the Ohio federal district court order dismissing the consolidated action and denying the intervention. On June 15, 2022, the Ohio state court entered an order continuing the stays of that case until the final resolution of the consolidated derivative actions pending in Ohio federal district court. The defendants will continue to defend against the claims. Management is unable to determine a range of potential losses that is reasonably possible of occurring.

In March 2021, AEP received a litigation demand letter from counsel representing a purported AEP shareholder. The litigation demand letter was directed to the Board of Directors of AEP (AEP Board) and contained factual allegations involving HB 6 that were generally consistent with those in the derivative litigation filed in state and federal court. The shareholder that sent the letter has since withdrawn the litigation demand, which is now terminated and of no further effect. In April 2023, AEP received a litigation demand from counsel representing the purported AEP shareholder who filed the dismissed derivative action in New York state court and unsuccessfully tried to intervene in the consolidated derivative actions in Ohio federal court. The litigation demand letter is directed to the AEP Board and contains factual allegations involving HB 6 that are generally consistent with those in the derivative litigation filed in state and federal court. The letter demands, among other things, that the AEP Board undertake an independent investigation into alleged legal violations by certain current and former directors and officers, and that AEP commence a civil action for breaches of fiduciary duty and related claims against any individuals who allegedly harmed AEP. The AEP Board will act in response to the letter as appropriate. Management is unable to determine a range of potential losses that is reasonably possible of occurring.

In May 2021, AEP received a subpoena from the SEC’s Division of Enforcement seeking various documents, including documents relating to the passage of HB 6 and documents relating to AEP’s policies and financial processes and controls. In August 2022, AEP received a second subpoena from the SEC seeking various additional documents relating to its ongoing investigation. AEP is cooperating fully with the SEC’s investigation, which has included taking testimony from certain individuals and inquiries regarding Empowering Ohio’s Economy, Inc., which is a 501(c)(4) social welfare organization, and related disclosures. AEP and the SEC are engaged in discussions about a possible resolution of the SEC’s investigation and potential claims under the securities laws, the outcome of which cannot be predicted and could subject AEP to civil penalties and other remedial measures. Management is unable to determine a range of potential losses that is reasonably possible of occurring, but management does not believe the results of this investigation or a possible resolution thereof will have a material impact on results of operations, cash flows or financial condition.

Claims for Indemnification Made by Owners of the Gavin Power Station

In November 2022, the Federal EPA issued a final decision denying Gavin Power LLC’s requested extension to allow a CCR surface impoundment at the Gavin Power Station to continue to receive CCR and non-CCR waste streams after April 11, 2021 until May 4, 2023 (the Gavin Denial). As part of the Gavin Denial, the Federal EPA made several determinations related to the CCR Rule (see “Environmental Issues - CCR Rule” section of Management’s Discussion and Analysis of Financial Condition and Results of Operations for additional information), including a determination that the closure of the 300 acre unlined fly ash reservoir (FAR) is noncompliant with the CCR Rule in multiple respects. The Gavin Power Station was formerly owned and operated by AEP and was sold to Gavin Power LLC and Lightstone Generation LLC in 2017. Pursuant to the PSA, AEP maintained responsibility to complete closure of the FAR in accordance with the closure plan approved by the Ohio EPA which was completed in July 2021. The PSA contains indemnification provisions, pursuant to which the owners of the Gavin Power Station have notified AEP they believe they are entitled to indemnification for any damages that may result from these claims, including any future enforcement or litigation resulting from the Federal EPA’s determinations of noncompliance with various aspects of the CCR Rule as part of the Gavin Denial. The owners of the Gavin Power Station have also sought indemnification for landowner claims for property damage

allegedly caused by modifications to the FAR. Management does not believe that the owners of the Gavin Power Station have any valid claim for indemnity or otherwise against AEP under the PSA. In addition, Gavin Power LLC, several AEP subsidiaries, and other parties have filed Petitions for Review of the Gavin Denial with the U.S. Court of Appeals for the District of Columbia Circuit. Management is unable to determine a range of potential losses that is reasonably possible of occurring.

Claims for Damages Related to Sabine Lignite Mining Agreement

In May 2023, North American Coal Corporation (NACC) and Sabine, a subsidiary of NACC, filed suit against SWEPCo in Texas state court for breach of the Lignite Mining Agreement (LMA) between Sabine and SWEPCo. NACC and Sabine assert that the terms of the LMA require SWEPCo to continue operating the Pirkey Plant and obtaining coal from the Sabine mine through 2035 and that SWEPCo has breached the agreement by closing the plant. In August 2023, a settlement agreement was reached and the suit was dismissed by the Texas state court. The settlement agreement did not have a material impact on SWEPCo’s net income, cash flows or financial condition.

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Acquisitions and Dispositions

9 Months Ended

Sep. 30, 2023

Acquisitions and Dispositions

ACQUISITIONS, DISPOSITIONS AND IMPAIRMENTS

The disclosures in this note apply to AEP unless indicated otherwise.

ACQUISITIONS

North Central Wind Energy Facilities (Vertically Integrated Utilities Segment) (Applies to AEP, PSO and SWEPCo)

In 2020, PSO and SWEPCo received regulatory approvals to acquire the NCWF, comprised of three Oklahoma wind facilities totaling 1,484 MWs, on a fixed cost turn-key basis. PSO and SWEPCo own undivided interests of 45.5% and 54.5% of the NCWF, respectively. In total, the three wind facilities cost approximately $2 billion and consist of Traverse (998 MW), Maverick (287 MW) and Sundance (199 MW). Output from the NCWF serves retail load in PSO’s Oklahoma service territory and both retail and FERC wholesale load in SWEPCo’s service territories in Arkansas and Louisiana. The Oklahoma and Louisiana portions of the NCWF revenue requirement, net of PTC benefit, are recoverable through authorized riders until the amounts are reflected in base rates. Recovery of the Arkansas portion of the NCWF revenue requirement through base rates was approved by the APSC in May 2022. The NCWF are subject to various regulatory performance requirements. If these performance requirements are not met, PSO and SWEPCo would recognize a regulatory liability to refund retail customers.

In March 2022, PSO and SWEPCo acquired respective undivided ownership interests in the entity that owned Traverse during its development and construction for $1.2 billion, the third of the three NCWF acquisitions. Immediately following the acquisition, PSO and SWEPCo liquidated the entity and simultaneously distributed the Traverse assets in proportion to their undivided ownership interests. Traverse was placed in-service in March 2022. PSO and SWEPCo apply the joint plant accounting model to account for their respective undivided interests in the assets, liabilities, revenues and expenses of the NCWF projects.

Rock Falls Wind Facility (Vertically Integrated Utilities Segment) (Applies to AEP and PSO)

In November 2022, PSO entered into an agreement to acquire the Rock Falls Wind Facility. In February 2023, the FERC approved PSO’s acquisition of the Rock Falls Wind Facility under Section 203 of the Federal Power Act. In March 2023, PSO acquired an ownership interest in the entity that owned Rock Falls during its development and construction for $146 million. In accordance with the guidance for “Business Combinations,” AEP management determined that the acquisition of the Rock Falls Wind Facility represents an asset acquisition. The current and noncurrent Obligations Under Operating Leases related to Rock Falls were not material as of September 30, 2023. See the “2022 Oklahoma Base Rate Case” section of Note 4 for additional information.

DISPOSITIONS

Termination of Planned Disposition of KPCo and KTCo (Vertically Integrated Utilities and AEP Transmission Holdco Segments) (Applies to AEP and AEPTCo)

In October 2021, AEP entered into a Stock Purchase Agreement (SPA) to sell KPCo and KTCo to Liberty Utilities Co., a subsidiary of Algonquin Power & Utilities Corp. (Liberty), for approximately a $2.85 billion enterprise value. The SPA was subsequently amended in September 2022 to reduce the purchase price to approximately $2.646 billion. The sale required approval from the KPSC and from the FERC under Section 203 of the Federal Power Act. The SPA contained certain termination rights if the closing of the sale did not occur by April 26, 2023.

In May 2022, the KPSC approved the sale of KPCo to Liberty subject to certain conditions contingent upon the closing of the sale. In December 2022, the FERC issued an order denying, without prejudice, authorization of the proposed sale stating the applicants failed to demonstrate the proposed transaction will not have an adverse effect on rates. In February 2023, a new filing for approval under Section 203 of the Federal Power Act was submitted. In March 2023, the KPSC and other intervenors made filings recommending the FERC reject AEP and Liberty’s new Section 203 application seeking approval of the sale.

In April 2023, AEP, AEPTCo and Liberty entered into a Mutual Termination Agreement (Termination Agreement) terminating the SPA. The parties entered into the Termination Agreement as all of the conditions precedent to closing the sale could not be satisfied prior to April 26, 2023.

The impact of the Termination Agreement did not have a material impact on AEP’s statements of income for the three and nine months ended September 30, 2023. Upon reverting to a held and used model in the first quarter of 2023, AEP was required to present its investment in the Kentucky Operations at the lower of fair value or historical carrying value which resulted in a $335 million reduction recorded in Property, Plant and Equipment. The reduced investment in KPCo’s assets is being amortized over the 30-year average useful life of the KPCo assets.

Disposition of the Competitive Contracted Renewables Portfolio (Generation & Marketing Segment)

(Applies to AEP)

In February 2022, AEP management announced the initiation of a process to sell all or a portion of AEP Renewables’ competitive contracted renewables portfolio (the portfolio) within the Generation & Marketing segment. In late January 2023, AEP received final bids from interested parties. In February 2023, AEP’s Board of Directors approved management’s plan to sell the portfolio and AEP signed an agreement with a nonaffiliated party. AEP recorded a pretax loss of $112 million ($88 million after-tax) in the first quarter of 2023 after reaching Held for Sale status and determining the carrying value of the portfolio exceeded the estimated fair value.

In August 2023, AEP completed the sale of the entire portfolio to the nonaffiliated party and received cash proceeds of approximately $1.2 billion, net of taxes and transaction costs.

Disposition of Mineral Rights (Generation & Marketing Segment) (Applies to AEP)

In June 2022, AEP closed on the sale of certain mineral rights to a nonaffiliated third-party and received $120 million of proceeds. The sale resulted in a pretax gain of $116 million in the second quarter of 2022.

IMPAIRMENTS

Flat Ridge 2 Wind LLC (Generation & Marketing Segment) (Applies to AEP)

In 2019, AEP acquired a 50% ownership interest in five non-consolidated joint ventures, including Flat Ridge 2 Wind LLC (Flat Ridge 2), and two tax equity partnerships. The five non-consolidated joint ventures are jointly owned and operated by BP Wind Energy. Flat Ridge 2 sells electricity to three counterparties through long-term PPAs.

Regarding AEP’s investment in Flat Ridge 2, In June 2022, as a result of Flat Ridge 2’s deteriorating financial performance, sale negotiations and AEP’s ongoing evaluation and ultimate decision to exit the investment in the near term, AEP determined a decline in the fair value of AEP’s investment in Flat Ridge 2 was other than temporary. In accordance with the accounting guidance for “Investments - Equity Method and Joint Ventures”, in the second quarter of 2022 AEP recorded a pretax other than temporary impairment charge of $186 million which is presented in Equity Earnings (Losses) of Unconsolidated Subsidiaries on AEP’s Statement of Income. AEP’s determination of fair value utilized the accounting guidance for Fair Value Measurement market approach to valuation and was based on negotiations to sell the investment to a non-affiliate. In the third quarter of 2022, AEP recorded an additional $2 million pretax other than temporary impairment charge which is presented in Equity Earnings (Losses) of Unconsolidated Subsidiaries on AEP’s Statement of Income. In September 2022, AEP signed a Purchase and Sale Agreement with a nonaffiliate for AEP’s interest in Flat Ridge 2. The transaction closed in the fourth quarter of 2022 and had an immaterial impact on the financial statements at closing.

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Benefit Plans

9 Months Ended

Sep. 30, 2023

Benefit Plans

BENEFIT PLANS

The disclosures in this note apply to all Registrants except AEPTCo.

AEP sponsors a qualified pension plan and two unfunded nonqualified pension plans.  Substantially all AEP employees are covered by the qualified plan or both the qualified and a nonqualified pension plan.  AEP also sponsors OPEB plans to provide health and life insurance benefits for retired employees.

Components of Net Periodic Benefit Cost (Credit)

Pension Plans

Three Months Ended September 30, 2023	AEP		AEP Texas		APCo		I&M		OPCo		PSO		SWEPCo
	(in millions)
Service Cost	$	23.6	$	2.1	$	2.3	$	2.9	$	2.1	$	1.4	$	2.0
Interest Cost	54.8		4.5		6.6		6.3		5.0		2.7		3.4
Expected Return on Plan Assets	(84.8)		(7.0)		(11.2)		(11.0)		(8.6)		(4.6)		(4.8)
Amortization of Net Actuarial Loss	0.3		—		—		—		—		—		—
Net Periodic Benefit Cost (Credit)	$	(6.1)	$	(0.4)	$	(2.3)	$	(1.8)	$	(1.5)	$	(0.5)	$	0.6

Three Months Ended September 30, 2022	AEP		AEP Texas		APCo		I&M		OPCo		PSO		SWEPCo
	(in millions)
Service Cost	$	30.7	$	2.8	$	2.9	$	4.0	$	2.8	$	1.8	$	2.7
Interest Cost	37.1		3.1		4.3		4.3		3.4		1.8		2.2
Expected Return on Plan Assets	(63.4)		(5.3)		(8.1)		(8.1)		(6.2)		(3.3)		(3.6)
Amortization of Net Actuarial Loss	15.8		1.2		1.9		1.8		1.3		0.7		0.9
Net Periodic Benefit Cost	$	20.2	$	1.8	$	1.0	$	2.0	$	1.3	$	1.0	$	2.2

Nine Months Ended September 30, 2023	AEP		AEP Texas		APCo		I&M		OPCo		PSO		SWEPCo
	(in millions)
Service Cost	$	70.8	$	6.2	$	6.8	$	8.9	$	6.3	$	4.2	$	5.8
Interest Cost	164.4		13.7		19.8		18.7		14.9		8.1		10.4
Expected Return on Plan Assets	(254.4)		(21.0)		(33.5)		(33.1)		(25.6)		(13.8)		(14.5)
Amortization of Net Actuarial Loss	1.0		—		—		—		—		—		—
Net Periodic Benefit Cost (Credit)	$	(18.2)	$	(1.1)	$	(6.9)	$	(5.5)	$	(4.4)	$	(1.5)	$	1.7

Nine Months Ended September 30, 2022	AEP		AEP Texas		APCo		I&M		OPCo		PSO		SWEPCo
	(in millions)
Service Cost	$	92.3	$	8.4	$	8.6	$	12.1	$	8.4	$	5.5	$	8.0
Interest Cost	111.2		9.1		13.1		12.7		10.0		5.3		6.8
Expected Return on Plan Assets	(190.1)		(15.8)		(24.3)		(24.2)		(18.6)		(10.1)		(10.9)
Amortization of Net Actuarial Loss	47.3		3.8		5.5		5.3		4.1		2.2		2.8
Net Periodic Benefit Cost	$	60.7	$	5.5	$	2.9	$	5.9	$	3.9	$	2.9	$	6.7

OPEB

Three Months Ended September 30, 2023	AEP		AEP Texas		APCo		I&M		OPCo		PSO		SWEPCo
	(in millions)
Service Cost	$	1.1	$	0.1	$	0.1	$	0.1	$	0.1	$	0.1	$	—
Interest Cost	11.6		0.9		1.8		1.3		1.2		0.6		0.8
Expected Return on Plan Assets	(27.4)		(2.2)		(4.0)		(3.3)		(2.9)		(1.5)		(1.8)
Amortization of Prior Service Credit	(15.8)		(1.3)		(2.3)		(2.2)		(1.6)		(1.0)		(1.3)
Amortization of Net Actuarial Loss	3.7		0.3		0.6		0.5		0.4		0.2		0.3
Net Periodic Benefit Credit	$	(26.8)	$	(2.2)	$	(3.8)	$	(3.6)	$	(2.8)	$	(1.6)	$	(2.0)

Three Months Ended September 30, 2022	AEP		AEP Texas		APCo		I&M		OPCo		PSO		SWEPCo
	(in millions)
Service Cost	$	1.8	$	0.1	$	0.2	$	0.2	$	0.2	$	0.2	$	0.1
Interest Cost	7.3		0.6		1.2		0.8		0.7		0.4		0.5
Expected Return on Plan Assets	(27.5)		(2.3)		(4.1)		(3.3)		(3.0)		(1.6)		(1.8)
Amortization of Prior Service Credit	(17.9)		(1.5)		(2.6)		(2.4)		(1.8)		(1.1)		(1.4)
Net Periodic Benefit Credit	$	(36.3)	$	(3.1)	$	(5.3)	$	(4.7)	$	(3.9)	$	(2.1)	$	(2.6)

Nine Months Ended September 30, 2023	AEP		AEP Texas		APCo		I&M		OPCo		PSO		SWEPCo
	(in millions)
Service Cost	$	3.4	$	0.3	$	0.4	$	0.5	$	0.3	$	0.2	$	0.2
Interest Cost	34.7		2.7		5.5		4.0		3.5		1.8		2.2
Expected Return on Plan Assets	(82.2)		(6.7)		(12.0)		(10.1)		(8.8)		(4.4)		(5.4)
Amortization of Prior Service Credit	(47.3)		(4.0)		(6.9)		(6.5)		(4.7)		(3.0)		(3.7)
Amortization of Net Actuarial Loss	11.1		0.9		1.7		1.4		1.2		0.6		0.8
Net Periodic Benefit Credit	$	(80.3)	$	(6.8)	$	(11.3)	$	(10.7)	$	(8.5)	$	(4.8)	$	(5.9)

Nine Months Ended September 30, 2022	AEP		AEP Texas		APCo		I&M		OPCo		PSO		SWEPCo
	(in millions)
Service Cost	$	5.5	$	0.3	$	0.6	$	0.7	$	0.5	$	0.4	$	0.4
Interest Cost	21.9		1.7		3.5		2.5		2.2		1.1		1.4
Expected Return on Plan Assets	(82.5)		(6.8)		(12.2)		(10.2)		(8.9)		(4.6)		(5.5)
Amortization of Prior Service Credit	(53.6)		(4.5)		(7.8)		(7.3)		(5.4)		(3.3)		(4.0)
Net Periodic Benefit Credit	$	(108.7)	$	(9.3)	$	(15.9)	$	(14.3)	$	(11.6)	$	(6.4)	$	(7.7)

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Business Segments

9 Months Ended

Sep. 30, 2023

Business Segments

BUSINESS SEGMENTS

The disclosures in this note apply to all Registrants unless indicated otherwise.

AEP’s Reportable Segments

AEP’s primary business is the generation, transmission and distribution of electricity.  Within its Vertically Integrated Utilities segment, AEP centrally dispatches generation assets and manages its overall utility operations on an integrated basis because of the substantial impact of cost-based rates and regulatory oversight.  Intersegment sales and transfers are generally based on underlying contractual arrangements and agreements.

AEP’s reportable segments and their related business activities are outlined below:

Vertically Integrated Utilities

•Generation, transmission and distribution of electricity for sale to retail and wholesale customers through assets owned and operated by AEGCo, APCo, I&M, KGPCo, KPCo, PSO, SWEPCo and WPCo.

Transmission and Distribution Utilities

•Transmission and distribution of electricity for sale to retail and wholesale customers through assets owned and operated by AEP Texas and OPCo.

•OPCo purchases energy and capacity to serve standard service offer customers and provides transmission and distribution services for all connected load.

AEP Transmission Holdco

•Development, construction and operation of transmission facilities through investments in AEPTCo. These investments have FERC-approved ROEs.

•Development, construction and operation of transmission facilities through investments in AEP’s transmission-only joint ventures. These investments have PUCT-approved or FERC-approved ROEs.

Generation & Marketing

•Contracted energy management services.

•Marketing, risk management and retail activities in ERCOT, MISO, PJM and SPP.

•Competitive generation in PJM.

The remainder of AEP’s activities are presented as Corporate and Other. While not considered a reportable segment, Corporate and Other primarily includes the purchasing of receivables from certain AEP utility subsidiaries, Parent’s guarantee revenue received from affiliates, investment income, interest income and interest expense, and other nonallocated costs.

The tables below represent AEP’s reportable segment income statement information for the three and nine months ended September 30, 2023 and 2022 and reportable segment balance sheet information as of September 30, 2023 and December 31, 2022.

	Three Months Ended September 30, 2023
	Vertically Integrated Utilities		Transmission and Distribution Utilities		AEP Transmission Holdco		Generation & Marketing		Corporate and Other (a)		Reconciling Adjustments		Consolidated
	(in millions)
Revenues from:
External Customers	$	3,158.1	$	1,535.2	$	94.0	$	527.5	$	26.9	$	—	$	5,341.7
Other Operating Segments	47.3		8.9		382.7		39.2		30.3		(508.4)		—
Total Revenues	$	3,205.4	$	1,544.1	$	476.7	$	566.7	$	57.2	$	(508.4)	$	5,341.7
Net Income (Loss)	$	514.0	$	206.0	$	203.9	$	132.8	$	(98.4)	$	—	$	958.3
	Three Months Ended September 30, 2022
	Vertically Integrated Utilities		Transmission and Distribution Utilities		AEP Transmission Holdco		Generation & Marketing		Corporate and Other (a)		Reconciling Adjustments		Consolidated
	(in millions)
Revenues from:
External Customers	$	3,174.6	$	1,525.5	$	81.9	$	733.1	$	11.0	$	—	$	5,526.1
Other Operating Segments	51.7		4.7		349.0		2.3		17.3		(425.0)		—
Total Revenues	$	3,226.3	$	1,530.2	$	430.9	$	735.4	$	28.3	$	(425.0)	$	5,526.1
Net Income (Loss)	$	476.9	$	165.5	$	171.4	$	96.2	$	(226.7)	$	—	$	683.3

	Nine Months Ended September 30, 2023
	Vertically Integrated Utilities		Transmission and Distribution Utilities		AEP Transmission Holdco		Generation & Marketing		Corporate and Other (a)		Reconciling Adjustments		Consolidated
	(in millions)
Revenues from:
External Customers	$	8,603.4	$	4,321.3	$	272.4	$	1,172.6	$	35.4	$	—	$	14,405.1
Other Operating Segments	134.3		27.2		1,118.4		52.5		83.9		(1,416.3)		—
Total Revenues	$	8,737.7	$	4,348.5	$	1,390.8	$	1,225.1	$	119.3	$	(1,416.3)	$	14,405.1
Net Income (Loss)	$	1,054.6	$	508.4	$	583.6	$	(62.2)	$	(209.6)	$	—	$	1,874.8
	Nine Months Ended September 30, 2022
	Vertically Integrated Utilities		Transmission and Distribution Utilities		AEP Transmission Holdco		Generation & Marketing		Corporate and Other (a)		Reconciling Adjustments		Consolidated
	(in millions)
Revenues from:
External Customers	$	8,416.4	$	4,064.5	$	244.4	$	1,997.0	$	36.1	$	—	$	14,758.4
Other Operating Segments	145.8		14.1		976.7		17.3		36.6		(1,190.5)		—
Total Revenues	$	8,562.2	$	4,078.6	$	1,221.1	$	2,014.3	$	72.7	$	(1,190.5)	$	14,758.4
Net Income (Loss)	$	1,079.4	$	483.1	$	487.8	$	278.1	$	(406.2)	$	—	$	1,922.2

	September 30, 2023
	Vertically Integrated Utilities		Transmission and Distribution Utilities		AEP Transmission Holdco		Generation & Marketing		Corporate and Other (a)			Reconciling Adjustments			Consolidated
	(in millions)
Total Assets	$	50,940.3	$	24,327.9	$	16,155.0	$	2,517.0	$	4,567.2	(b)	$	(3,381.8)	(c)	$	95,125.6

	December 31, 2022
	Vertically Integrated Utilities		Transmission and Distribution Utilities		AEP Transmission Holdco		Generation & Marketing		Corporate and Other (a)			Reconciling Adjustments			Consolidated
	(in millions)
Total Assets	$	49,761.8	$	22,920.2	$	15,215.8	$	4,520.1	$	6,768.4	(b)	$	(5,783.0)	(c)	$	93,403.3

(a)Corporate and Other primarily includes the purchasing of receivables from certain AEP utility subsidiaries. This segment also includes Parent’s guarantee revenue received from affiliates, investment income, interest income, interest expense and other nonallocated costs.

(b)Includes elimination of AEP Parent’s investments in wholly-owned subsidiary companies.

(c)Reconciling Adjustments for Total Assets primarily include elimination of intercompany advances to affiliates and intercompany accounts receivable.

Registrant Subsidiaries’ Reportable Segments (Applies to all Registrant Subsidiaries except AEPTCo)

The Registrant Subsidiaries each have one reportable segment, an integrated electricity generation, transmission and distribution business for APCo, I&M, PSO and SWEPCo, and an integrated electricity transmission and distribution business for AEP Texas and OPCo.  Other activities are insignificant.  The Registrant Subsidiaries’ operations are managed on an integrated basis because of the substantial impact of cost-based rates and regulatory oversight on the business process, cost structures and operating results.

AEPTCo’s Reportable Segments

AEPTCo Parent is the holding company of seven FERC-regulated transmission-only electric utilities. The seven State Transcos have been identified as operating segments of AEPTCo under the accounting guidance for “Segment Reporting.” The State Transcos business consists of developing, constructing and operating transmission facilities at the request of the RTOs in which they operate and in replacing and upgrading facilities, assets and components of the existing AEP transmission system as needed to maintain reliability standards and provide service to AEP’s wholesale and retail customers. The State Transcos are regulated for rate-making purposes exclusively by the FERC and earn revenues through tariff rates charged for the use of their electric transmission systems.

AEPTCo’s Chief Operating Decision Maker makes operating decisions, allocates resources to and assesses performance based on these operating segments. The State Transcos operating segments all have similar economic characteristics and meet all of the criteria under the accounting guidance for “Segment Reporting” to be aggregated into one operating segment. As a result, AEPTCo has one reportable segment. The remainder of AEPTCo’s activity is presented in AEPTCo Parent. While not considered a reportable segment, AEPTCo Parent represents the activity of the holding company which primarily relates to debt financing activity and general corporate activities.

The tables below present AEPTCo’s reportable segment income statement information for the three and nine months ended September 30, 2023 and 2022 and reportable segment balance sheet information as of September 30, 2023 and December 31, 2022.

	Three Months Ended September 30, 2023
	State Transcos		AEPTCo Parent			Reconciling Adjustments		AEPTCo Consolidated
	(in millions)
Revenues from:
External Customers	$	92.8	$	—		$	—	$	92.8
Sales to AEP Affiliates	369.9		—			—		369.9
Total Revenues	$	462.7	$	—		$	—	$	462.7
Net Income	$	178.2	$	1.0	(a)	$	—	$	179.2
	Three Months Ended September 30, 2022
	State Transcos		AEPTCo Parent			Reconciling Adjustments		AEPTCo Consolidated
	(in millions)
Revenues from:
External Customers	$	87.2	$	—		$	—	$	87.2
Sales to AEP Affiliates	331.3		—			—		331.3
Total Revenues	$	418.5	$	—		$	—	$	418.5
Net Income	$	152.6	$	0.1	(a)	$	—	$	152.7

	Nine Months Ended September 30, 2023
	State Transcos		AEPTCo Parent			Reconciling Adjustments		AEPTCo Consolidated
	(in millions)
Revenues from:
External Customers	$	269.2	$	—		$	—	$	269.2
Sales to AEP Affiliates	1,080.0		—			—		1,080.0
Total Revenues	$	1,349.2	$	—		$	—	$	1,349.2
Net Income	$	514.0	$	3.6	(a)	$	—	$	517.6
	Nine Months Ended September 30, 2022
	State Transcos		AEPTCo Parent			Reconciling Adjustments		AEPTCo Consolidated
	(in millions)
Revenues from:
External Customers	$	249.5	$	—		$	—	$	249.5
Sales to AEP Affiliates	933.8		—			—		933.8
Total Revenues	$	1,183.3	$	—		$	—	$	1,183.3
Net Income	$	426.4	$	0.2	(a)	$	—	$	426.6

	September 30, 2023
	State Transcos		AEPTCo Parent			Reconciling Adjustments			AEPTCo Consolidated
	(in millions)
Total Assets	$	14,760.8	$	5,561.2	(b)	$	(5,610.0)	(c)	$	14,712.0
	December 31, 2022
	State Transcos		AEPTCo Parent			Reconciling Adjustments			AEPTCo Consolidated
	(in millions)
Total Assets	$	13,875.6	$	4,817.4	(b)	$	(4,878.8)	(c)	$	13,814.2

(a)Includes the elimination of AEPTCo Parent’s equity earnings in the State Transcos.

(b)Primarily relates to Notes Receivable from the State Transcos.

(c)Primarily relates to the elimination of Notes Receivable from the State Transcos.

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Derivatives and Hedging

9 Months Ended

Sep. 30, 2023

Derivatives and Hedging

DERIVATIVES AND HEDGING

The disclosures in this note apply to all Registrants unless indicated otherwise. For the periods presented, AEPTCo did not have any derivative and hedging activity.

OBJECTIVES FOR UTILIZATION OF DERIVATIVE INSTRUMENTS

AEPSC is agent for and transacts on behalf of certain AEP subsidiaries, including the Registrant Subsidiaries. AEPEP is agent for and transacts on behalf of other AEP subsidiaries.

The Registrants are exposed to certain market risks as major power producers and participants in the electricity, capacity, natural gas, coal and emission allowance markets.  These risks include commodity price risks which may be subject to capacity risk, interest rate risk and credit risk.  These risks represent the risk of loss that may impact the Registrants due to changes in the underlying market prices or rates.  Management utilizes derivative instruments to manage these risks.

STRATEGIES FOR UTILIZATION OF DERIVATIVE INSTRUMENTS TO ACHIEVE OBJECTIVES

Risk Management Strategies

The strategy surrounding the use of derivative instruments primarily focuses on managing risk exposures, future cash flows and creating value utilizing both economic and formal hedging strategies. The risk management strategies also include the use of derivative instruments for trading purposes which focus on seizing market opportunities to create value driven by expected changes in the market prices of the commodities. To accomplish these objectives, the Registrants primarily employ risk management contracts including physical and financial forward purchase-and-sale contracts and, to a lesser extent, OTC swaps and options. Not all risk management contracts meet the definition of a derivative under the accounting guidance for “Derivatives and Hedging.” Derivative risk management contracts elected normal under the normal purchases and normal sales scope exception are not subject to the requirements of this accounting guidance.

The Registrants utilize power, capacity, coal, natural gas, interest rate and, to a lesser extent, heating oil, gasoline and other commodity contracts to manage the risk associated with the energy business. The Registrants utilize interest rate derivative contracts in order to manage the interest rate exposure associated with the commodity portfolio. For disclosure purposes, such risks are grouped as “Commodity,” as these risks are related to energy risk management activities. The Registrants also utilize derivative contracts to manage interest rate risk associated with debt financing. For disclosure purposes, these risks are grouped as “Interest Rate.” The amount of risk taken is determined by the Commercial Operations, Energy Supply and Finance groups in accordance with established risk management policies as approved by the Finance Committee of the Board of Directors.

The following tables represent the gross notional volume of the Registrants’ outstanding derivative contracts:

Notional Volume of Derivative Instruments

September 30, 2023

Primary Risk Exposure	Unit of Measure	AEP		AEP Texas		APCo		I&M		OPCo		PSO		SWEPCo
		(in millions)
Commodity:
Power	MWhs	262.3		—		28.4		9.0		2.3		5.6		4.4
Natural Gas	MMBtus	149.8		—		27.3		—		—		25.3		13.1
Heating Oil and Gasoline	Gallons	8.3		2.2		1.3		0.8		1.7		1.1		1.2
Interest Rate	USD	$	80.1	$	—	$	—	$	—	$	—	$	—	$	—
Interest Rate on Long-term Debt	USD	$	950.0	$	—	$	—	$	—	$	—	$	—	$	—

December 31, 2022

Primary Risk Exposure	Unit of Measure	AEP		AEP Texas		APCo		I&M		OPCo		PSO		SWEPCo
		(in millions)
Commodity:
Power	MWhs	226.8		—		17.9		4.2		2.5		2.9		2.2
Natural Gas	MMBtus	77.1		—		1.9		—		—		1.9		2.1
Heating Oil and Gasoline	Gallons	6.9		1.9		1.0		0.7		1.4		0.9		1.0
Interest Rate	USD	$	99.9	$	—	$	—	$	—	$	—	$	—	$	—
Interest Rate on Long-term Debt	USD	$	1,650.0	$	—	$	—	$	—	$	—	$	200.0	$	—

Fair Value Hedging Strategies (Applies to AEP)

Parent enters into interest rate derivative transactions as part of an overall strategy to manage the mix of fixed-rate and floating-rate debt. Certain interest rate derivative transactions effectively modify exposure to interest rate risk by converting a portion of fixed-rate debt to a floating-rate. Provided specific criteria are met, these interest rate derivatives may be designated as fair value hedges.

Cash Flow Hedging Strategies

The Registrants utilize cash flow hedges on certain derivative transactions for the purchase and sale of power (“Commodity”) in order to manage the variable price risk related to forecasted purchases and sales. Management monitors the potential impacts of commodity price changes and, where appropriate, enters into derivative transactions to protect profit margins for a portion of future electricity sales and purchases. The Registrants do not hedge all commodity price risk.

The Registrants utilize a variety of interest rate derivative transactions in order to manage interest rate risk exposure. The Registrants also utilize interest rate derivative contracts to manage interest rate exposure related to future borrowings of fixed-rate debt. The Registrants do not hedge all interest rate exposure.

ACCOUNTING FOR DERIVATIVE INSTRUMENTS AND THE IMPACT ON THE FINANCIAL STATEMENTS

The accounting guidance for “Derivatives and Hedging” requires recognition of all qualifying derivative instruments as either assets or liabilities on the balance sheets at fair value. The fair values of derivative instruments accounted for using MTM accounting or hedge accounting are based on exchange prices and broker quotes. If a quoted market price is not available, the estimate of fair value is based on the best information available including valuation models that estimate future energy prices based on existing market and broker quotes and other assumptions. In order to determine the relevant fair values of the derivative instruments, the Registrants apply valuation adjustments for discounting, liquidity and credit quality.

Credit risk is the risk that a counterparty will fail to perform on the contract or fail to pay amounts due. Liquidity risk represents the risk that imperfections in the market will cause the price to vary from estimated fair value based upon prevailing market supply and demand conditions. Since energy markets are imperfect and volatile, there are inherent risks related to the underlying assumptions in models used to fair value risk management contracts. Unforeseen events may cause reasonable price curves to differ from actual price curves throughout a contract’s term and at the time a contract settles. Consequently, there could be significant adverse or favorable effects on future net income and cash flows if market prices are not consistent with management’s estimates of current market consensus for forward prices in the current period. This is particularly true for longer term contracts. Cash flows may vary based on market conditions, margin requirements and the timing of settlement of risk management contracts.

According to the accounting guidance for “Derivatives and Hedging,” the Registrants reflect the fair values of derivative instruments subject to netting agreements with the same counterparty net of related cash collateral. For certain risk management contracts, the Registrants are required to post or receive cash collateral based on third-party contractual agreements and risk profiles. AEP netted cash collateral received from third-parties against short-term and long-term risk management assets in the amounts of $93 million and $481 million as of September 30, 2023 and December 31, 2022, respectively. There was no cash collateral received from third-parties netted against short-term and long-term risk management assets for the Registrant Subsidiaries as of September 30, 2023 and December 31, 2022. The amount of cash collateral paid to third-parties netted against short-term and long-term risk management liabilities was immaterial for the Registrants as of September 30, 2023 and December 31, 2022.

The following tables represent the gross fair value of the Registrants’ derivative activity on the balance sheets. Unless shown as a separate line on the balance sheets due to materiality, Current Risk Management Assets are included in Prepayments and Other Current Assets, Long-term Risk Management Assets are included in Deferred Charges and Other Noncurrent Assets, Current Risk Management Liabilities are included in Other Current Liabilities and Long-term Risk Management Liabilities are included in Deferred Credits and Other Noncurrent Liabilities on the balance sheets.

AEP

	September 30, 2023
	Risk Management Contracts		Hedging Contracts				Gross Amounts of Risk Management Assets/ Liabilities Recognized		Gross Amounts Offset in the Statement of Financial Position (b)		Net Amounts of Assets/Liabilities Presented in the Statement of Financial Position (c)
Balance Sheet Location	Commodity (a)		Commodity (a)		Interest Rate (a)
	(in millions)
Current Risk Management Assets	$	595.7	$	55.6	$	—	$	651.3	$	(388.6)	$	262.7
Long-term Risk Management Assets	465.3		83.3		—		548.6		(258.4)		290.2
Total Assets	1,061.0		138.9		—		1,199.9		(647.0)		552.9
Current Risk Management Liabilities	460.3		9.9		43.2		513.4		(361.9)		151.5
Long-term Risk Management Liabilities	374.8		1.2		94.9		470.9		(192.5)		278.4
Total Liabilities	835.1		11.1		138.1		984.3		(554.4)		429.9
Total MTM Derivative Contract Net Assets (Liabilities)	$	225.9	$	127.8	$	(138.1)	$	215.6	$	(92.6)	$	123.0

	December 31, 2022
	Risk Management Contracts		Hedging Contracts				Gross Amounts of Risk Management Assets/ Liabilities Recognized		Gross Amounts Offset in the Statement of Financial Position (b)		Net Amounts of Assets/Liabilities Presented in the Statement of Financial Position (c)
Balance Sheet Location	Commodity (a)		Commodity (a)		Interest Rate (a)
	(in millions)
Current Risk Management Assets	$	965.4	$	212.2	$	1.8	$	1,179.4	$	(830.6)	$	348.8
Long-term Risk Management Assets	565.6		148.9		14.3		728.8		(444.7)		284.1
Total Assets	1,531.0		361.1		16.1		1,908.2		(1,275.3)		632.9
Current Risk Management Liabilities	663.8		60.4		41.4		765.6		(620.4)		145.2
Long-term Risk Management Liabilities	412.0		17.4		91.1		520.5		(175.3)		345.2
Total Liabilities	1,075.8		77.8		132.5		1,286.1		(795.7)		490.4
Total MTM Derivative Contract Net Assets (Liabilities)	$	455.2	$	283.3	$	(116.4)	$	622.1	$	(479.6)	$	142.5

AEP Texas

	September 30, 2023
	Risk Management		Gross Amounts Offset		Net Amounts of Assets/Liabilities
	Contracts –		in the Statement of		Presented in the Statement of
Balance Sheet Location	Commodity (a)		Financial Position (b)		Financial Position (c)
	(in millions)
Current Risk Management Assets	$	0.4	$	—	$	0.4
Long-term Risk Management Assets	—		—		—
Total Assets	0.4		—		0.4
Current Risk Management Liabilities	—		—		—
Long-term Risk Management Liabilities	—		—		—
Total Liabilities	—		—		—
Total MTM Derivative Contract Net Assets	$	0.4	$	—	$	0.4

	December 31, 2022
	Risk Management		Gross Amounts Offset		Net Amounts of Assets/Liabilities
	Contracts –		in the Statement of		Presented in the Statement of
Balance Sheet Location	Commodity (a)		Financial Position (b)		Financial Position (c)
	(in millions)
Current Risk Management Assets	$	—	$	—	$	—
Long-term Risk Management Assets	—		—		—
Total Assets	—		—		—
Current Risk Management Liabilities	—		—		—
Long-term Risk Management Liabilities	—		—		—
Total Liabilities	—		—		—
Total MTM Derivative Contract Net Assets	$	—	$	—	$	—

APCo

	September 30, 2023
	Risk Management		Gross Amounts Offset		Net Amounts of Assets/Liabilities
	Contracts –		in the Statement of		Presented in the Statement of
Balance Sheet Location	Commodity (a)		Financial Position (b)		Financial Position (c)
	(in millions)
Current Risk Management Assets	$	48.8	$	(2.4)	$	46.4
Long-term Risk Management Assets	0.8		(0.6)		0.2
Total Assets	49.6		(3.0)		46.6
Current Risk Management Liabilities	4.2		(2.4)		1.8
Long-term Risk Management Liabilities	1.5		(0.6)		0.9
Total Liabilities	5.7		(3.0)		2.7
Total MTM Derivative Contract Net Assets	$	43.9	$	—	$	43.9

	December 31, 2022
	Risk Management		Gross Amounts Offset		Net Amounts of Assets/Liabilities
	Contracts –		in the Statement of		Presented in the Statement of
Balance Sheet Location	Commodity (a)		Financial Position (b)		Financial Position (c)
	(in millions)
Current Risk Management Assets	$	69.3	$	(0.2)	$	69.1
Long-term Risk Management Assets	0.7		(0.7)		—
Total Assets	70.0		(0.9)		69.1
Current Risk Management Liabilities	4.1		(0.5)		3.6
Long-term Risk Management Liabilities	0.7		(0.6)		0.1
Total Liabilities	4.8		(1.1)		3.7
Total MTM Derivative Contract Net Assets	$	65.2	$	0.2	$	65.4

I&M

	September 30, 2023
	Risk Management		Gross Amounts Offset		Net Amounts of Assets/Liabilities
	Contracts –		in the Statement of		Presented in the Statement of
Balance Sheet Location	Commodity (a)		Financial Position (b)		Financial Position (c)
	(in millions)
Current Risk Management Assets	$	20.2	$	(4.4)	$	15.8
Long-term Risk Management Assets	6.6		(1.2)		5.4
Total Assets	26.8		(5.6)		21.2
Current Risk Management Liabilities	5.3		(4.2)		1.1
Long-term Risk Management Liabilities	1.0		(1.0)		—
Total Liabilities	6.3		(5.2)		1.1
Total MTM Derivative Contract Net Assets (Liabilities)	$	20.5	$	(0.4)	$	20.1

	December 31, 2022
	Risk Management		Gross Amounts Offset		Net Amounts of Assets/Liabilities
	Contracts –		in the Statement of		Presented in the Statement of
Balance Sheet Location	Commodity (a)		Financial Position (b)		Financial Position (c)
	(in millions)
Current Risk Management Assets	$	16.0	$	(0.8)	$	15.2
Long-term Risk Management Assets	0.5		(0.3)		0.2
Total Assets	16.5		(1.1)		15.4
Current Risk Management Liabilities	0.9		(0.9)		—
Long-term Risk Management Liabilities	0.3		(0.3)		—
Total Liabilities	1.2		(1.2)		—
Total MTM Derivative Contract Net Assets	$	15.3	$	0.1	$	15.4

OPCo

	September 30, 2023
	Risk Management		Gross Amounts Offset		Net Amounts of Assets/Liabilities
	Contracts –		in the Statement of		Presented in the Statement of
Balance Sheet Location	Commodity (a)		Financial Position (b)		Financial Position (c)
	(in millions)
Current Risk Management Assets	$	0.3	$	—	$	0.3
Long-term Risk Management Assets	—		—		—
Total Assets	0.3		—		0.3
Current Risk Management Liabilities	5.7		—		5.7
Long-term Risk Management Liabilities	45.9		—		45.9
Total Liabilities	51.6		—		51.6
Total MTM Derivative Contract Net Liabilities	$	(51.3)	$	—	$	(51.3)

	December 31, 2022
	Risk Management		Gross Amounts Offset		Net Amounts of Assets/Liabilities
	Contracts –		in the Statement of		Presented in the Statement of
Balance Sheet Location	Commodity (a)		Financial Position (b)		Financial Position (c)
	(in millions)
Current Risk Management Assets	$	—	$	—	$	—
Long-term Risk Management Assets	—		—		—
Total Assets	—		—		—
Current Risk Management Liabilities	2.1		(0.3)		1.8
Long-term Risk Management Liabilities	37.9		—		37.9
Total Liabilities	40.0		(0.3)		39.7
Total MTM Derivative Contract Net Assets (Liabilities)	$	(40.0)	$	0.3	$	(39.7)

PSO

	September 30, 2023
	Risk Management		Gross Amounts Offset		Net Amounts of Assets/Liabilities
	Contracts –		in the Statement of		Presented in the Statement of
Balance Sheet Location	Commodity (a)		Financial Position (b)		Financial Position (c)
	(in millions)
Current Risk Management Assets	$	28.3	$	(0.1)	$	28.2
Long-term Risk Management Assets	0.3		(0.3)		—
Total Assets	28.6		(0.4)		28.2
Current Risk Management Liabilities	7.2		(0.1)		7.1
Long-term Risk Management Liabilities	0.4		(0.3)		0.1
Total Liabilities	7.6		(0.4)		7.2
Total MTM Derivative Contract Net Assets	$	21.0	$	—	$	21.0

	December 31, 2022
	Risk Management Contracts –		Hedging Contracts		Gross Amounts of Risk Management Assets/Liabilities Recognized		Gross Amounts Offset in the Statement of Financial Position (b)		Net Amounts of Assets/Liabilities Presented in the Statement of Financial Position (c)
Balance Sheet Location	Commodity (a)		Interest Rate (a)
	(in millions)
Current Risk Management Assets	$	24.1	$	1.6	$	25.7	$	(0.4)	$	25.3
Long-term Risk Management Assets	—		—		—		—		—
Total Assets	24.1		1.6		25.7		(0.4)		25.3
Current Risk Management Liabilities	2.1		—		2.1		(0.5)		1.6
Long-term Risk Management Liabilities	—		—		—		—		—
Total Liabilities	2.1		—		2.1		(0.5)		1.6
Total MTM Derivative Contract Net Assets	$	22.0	$	1.6	$	23.6	$	0.1	$	23.7

SWEPCo

	September 30, 2023
	Risk Management		Gross Amounts Offset		Net Amounts of Assets/Liabilities
	Contracts –		in the Statement of		Presented in the Statement of
Balance Sheet Location	Commodity (a)		Financial Position (b)		Financial Position (c)
	(in millions)
Current Risk Management Assets	$	17.6	$	(0.5)	$	17.1
Long-term Risk Management Assets	—		—		—
Total Assets	17.6		(0.5)		17.1
Current Risk Management Liabilities	3.6		(0.5)		3.1
Long-term Risk Management Liabilities	0.4		—		0.4
Total Liabilities	4.0		(0.5)		3.5
Total MTM Derivative Contract Net Assets	$	13.6	$	—	$	13.6

	December 31, 2022
	Risk Management		Gross Amounts Offset		Net Amounts of Assets/Liabilities
	Contracts –		in the Statement of		Presented in the Statement of
Balance Sheet Location	Commodity (a)		Financial Position (b)		Financial Position (c)
	(in millions)
Current Risk Management Assets	$	16.8	$	(0.4)	$	16.4
Long-term Risk Management Assets	—		—		—
Total Assets	16.8		(0.4)		16.4
Current Risk Management Liabilities	2.0		(0.6)		1.4
Long-term Risk Management Liabilities	—		—		—
Total Liabilities	2.0		(0.6)		1.4
Total MTM Derivative Contract Net Assets	$	14.8	$	0.2	$	15.0

(a)Derivative instruments within these categories are disclosed as gross.  These instruments are subject to master netting agreements and are presented on the balance sheets on a net basis in accordance with the accounting guidance for “Derivatives and Hedging.”

(b)Amounts include counterparty netting of risk management and hedging contracts and associated cash collateral in accordance with the accounting guidance for “Derivatives and Hedging.”

(c)All derivative contracts subject to a master netting arrangement or similar agreement are offset in the statement of financial position.

The tables below present the Registrants’ amount of gain (loss) recognized on risk management contracts:

Amount of Gain (Loss) Recognized on Risk Management Contracts

	Three Months Ended September 30, 2023
Location of Gain (Loss)	AEP		AEP Texas		APCo		I&M		OPCo		PSO		SWEPCo
	(in millions)
Vertically Integrated Utilities Revenues	$	(9.5)	$	—	$	—	$	—	$	—	$	—	$	—
Generation & Marketing Revenues	(1.4)		—		—		—		—		—		—
Electric Generation, Transmission and Distribution Revenues	—		—		0.1		(9.6)		—		—		—
Purchased Electricity, Fuel and Other Consumables Used for Electric Generation	0.2		—		0.2		—		—		—		—
Maintenance	(0.4)		(0.1)		(0.1)		—		(0.1)		(0.1)		(0.1)
Regulatory Assets (a)	1.2		0.5		1.2		1.7		0.5		(3.5)		(1.1)
Regulatory Liabilities (a)	43.0		0.4		11.9		1.6		—		12.9		12.7
Total Gain (Loss) on Risk Management Contracts	$	33.1	$	0.8	$	13.3	$	(6.3)	$	0.4	$	9.3	$	11.5

	Three Months Ended September 30, 2022
Location of Gain (Loss)	AEP		AEP Texas			APCo		I&M		OPCo		PSO		SWEPCo
	(in millions)
Vertically Integrated Utilities Revenues	$	2.1	$	—		$	—	$	—	$	—	$	—	$	—
Generation & Marketing Revenues	116.7		—			—		—		—		—		—
Electric Generation, Transmission and Distribution Revenues	—		—			0.3		—		—		—		—
Other Revenues - Nonaffiliated	—		—		`	—		1.9		—		—		—
Purchased Electricity, Fuel and Other Consumables Used for Electric Generation	0.9		—			0.9		0.1		—		—		—
Other Operation	1.4		0.4			0.1		0.1		0.2		0.2		0.2
Maintenance	2.0		0.5			0.2		0.2		0.4		0.2		0.3
Regulatory Assets (a)	4.3		—			—		0.1		4.1		—		0.1
Regulatory Liabilities (a)	103.2		(1.5)			59.7		3.8		0.9		19.7		7.0
Total Gain (Loss) on Risk Management Contracts	$	230.6	$	(0.6)		$	61.2	$	6.2	$	5.6	$	20.1	$	7.6

	Nine Months Ended September 30, 2023
Location of Gain (Loss)	AEP		AEP Texas		APCo		I&M		OPCo		PSO		SWEPCo
	(in millions)
Vertically Integrated Utilities Revenues	$	2.2	$	—	$	—	$	—	$	—	$	—	$	—
Generation & Marketing Revenues	(290.6)		—		—		—		—		—		—
Electric Generation, Transmission and Distribution Revenues	—		—		0.1		2.1		—		—		—
Purchased Electricity, Fuel and Other Consumables Used for Electric Generation	2.2		—		2.1		0.1		—		—		—
Other Operation	(0.1)		—		—		—		—		—		—
Maintenance	(0.6)		(0.2)		(0.1)		—		(0.1)		(0.1)		(0.1)
Regulatory Assets (a)	(36.0)		—		—		(0.4)		(24.6)		(7.0)		(3.5)
Regulatory Liabilities (a)	143.5		0.4		3.1		6.4		—		73.3		58.2
Total Gain (Loss) on Risk Management Contracts	$	(179.4)	$	0.2	$	5.2	$	8.2	$	(24.7)	$	66.2	$	54.6

	Nine Months Ended September 30, 2022
Location of Gain (Loss)	AEP		AEP Texas		APCo		I&M		OPCo		PSO		SWEPCo
	(in millions)
Vertically Integrated Utilities Revenues	$	2.2	$	—	$	—	$	—	$	—	$	—	$	—
Generation & Marketing Revenues	390.0		—		—		—		—		—		—
Electric Generation, Transmission and Distribution Revenues	—		—		0.4		(0.1)		—		—		—
Other Revenues - Nonaffiliated	—		—		—		1.9		—		—		—
Purchased Electricity, Fuel and Other Consumables Used for Electric Generation	3.3		—		3.0		0.1		—		0.1		—
Other Operation	3.7		1.1		0.3		0.4		0.6		0.5		0.6
Maintenance	5.2		1.4		0.7		0.5		0.9		0.6		0.8
Regulatory Assets (a)	49.3		0.1		—		(1.2)		49.0		3.6		(2.1)
Regulatory Liabilities (a)	250.1		(0.6)		79.9		7.0		2.5		71.4		64.8
Total Gain on Risk Management Contracts	$	703.8	$	2.0	$	84.3	$	8.6	$	53.0	$	76.2	$	64.1

(a)Represents realized and unrealized gains and losses subject to regulatory accounting treatment recorded as either current or noncurrent on the balance sheets.

Certain qualifying derivative instruments have been designated as normal purchase or normal sale contracts, as provided in the accounting guidance for “Derivatives and Hedging.” Derivative contracts that have been designated as normal purchases or normal sales under that accounting guidance are not subject to MTM accounting treatment and are recognized on the statements of income on an accrual basis.

The accounting for the changes in the fair value of a derivative instrument depends on whether it qualifies for and has been designated as part of a hedging relationship and further, on the type of hedging relationship. Depending on the exposure, management designates a hedging instrument as a fair value hedge or a cash flow hedge.

For contracts that have not been designated as part of a hedging relationship, the accounting for changes in fair value depends on whether the derivative instrument is held for trading purposes. Unrealized and realized gains and losses on derivative instruments held for trading purposes are included in revenues on a net basis on the statements of income. Unrealized and realized gains and losses on derivative instruments not held for trading purposes are included in revenues or expenses on the statements of income depending on the relevant facts and circumstances. Certain derivatives that economically hedge future commodity risk are recorded in the same line item on the statements of income as that of the associated risk being hedged. However, unrealized and some realized gains and losses in regulated jurisdictions for both trading and non-trading derivative instruments are recorded as regulatory assets (for losses) or regulatory liabilities (for gains) in accordance with the accounting guidance for “Regulated Operations.”

Accounting for Fair Value Hedging Strategies (Applies to AEP)

For fair value hedges (i.e. hedging the exposure to changes in the fair value of an asset, liability or an identified portion thereof attributable to a particular risk), the gain or loss on the derivative instrument as well as the offsetting gain or loss on the hedged item associated with the hedged risk impacts net income during the period of change.

AEP records realized and unrealized gains or losses on interest rate swaps that are designated and qualify for fair value hedge accounting treatment and any offsetting changes in the fair value of the debt being hedged in Interest Expense on the statements of income.

The following table shows the impacts recognized on the balance sheets related to the hedged items in fair value hedging relationships:

	Carrying Amount of the Hedged Liabilities				Cumulative Amount of Fair Value Hedging Adjustment Included in the Carrying Amount of the Hedged Liabilities
	September 30, 2023		December 31, 2022		September 30, 2023		December 31, 2022
	(in millions)
Long-term Debt (a) (b)	$	(840.1)	$	(855.5)	$	106.1	$	89.7

(a)Amounts included on the Balance Sheet within Noncurrent Liabilities line item Long-term Debt.

(b)Amounts include $(32) million and $(38) million as of September 30, 2023 and December 31, 2022, respectively, for the fair value hedge adjustment of hedged debt obligations for which hedge accounting has been discontinued.

The pretax effects of fair value hedge accounting on income were as follows:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2023		2022		2023		2022
	(in millions)
Gain (Loss) on Interest Rate Contracts:
Fair Value Hedging Instruments (a)	$	(13.4)	$	(36.0)	$	(10.7)	$	(98.4)
Fair Value Portion of Long-term Debt (a)	13.4		36.0		10.7		98.4

(a)Gain (Loss) is included in Interest Expense on the statements of income.

Accounting for Cash Flow Hedging Strategies (Applies to AEP, AEP Texas, APCo, I&M, PSO and SWEPCo)

For cash flow hedges (i.e. hedging the exposure to variability in expected future cash flows that is attributable to a particular risk), the Registrants initially report the gain or loss on the derivative instrument as a component of Accumulated Other Comprehensive Income (Loss) on the balance sheets until the period the hedged item affects net income.

Realized gains and losses on derivative contracts for the purchase and sale of power designated as cash flow hedges are included in Total Revenues or Purchased Electricity, Fuel and Other Consumables Used for Electric Generation on the statements of income or in Regulatory Assets or Regulatory Liabilities on the balance sheets, depending on the specific nature of the risk being hedged. During the three and nine months ended September 30, 2023 and 2022, AEP applied cash flow hedging to outstanding power derivatives and the Registrant Subsidiaries did not.

The Registrants reclassify gains and losses on interest rate derivative hedges related to debt financings from Accumulated Other Comprehensive Income (Loss) on the balance sheets into Interest Expense on the statements of income in those periods in which hedged interest payments occur. During the three months ended September 30, 2023, the Registrants did not apply cash flow hedging to outstanding interest rate derivatives. During the nine months ended September 30, 2023, AEP, AEP Texas, I&M, PSO and SWEPCo applied cash flow hedging to outstanding interest rate derivatives and the other Registrant Subsidiaries did not. During the three and nine months ended September 30, 2022, AEP applied cash flow hedging to outstanding interest rate derivatives and the Registrant Subsidiaries did not.

For details on effective cash flow hedges included in Accumulated Other Comprehensive Income (Loss) on the balance sheets and the reasons for changes in cash flow hedges, see Note 3 - Comprehensive Income.

Cash flow hedges included in Accumulated Other Comprehensive Income (Loss) on the balance sheets were:

Impact of Cash Flow Hedges on AEP’s Balance Sheets

	September 30, 2023				December 31, 2022
	Commodity		Interest Rate		Commodity		Interest Rate
	(in millions)
AOCI Gain Net of Tax	$	100.6	$	4.7	$	223.5	$	0.3
Portion Expected to be Reclassed to Net Income During the Next Twelve Months	36.1		4.3		119.9		0.3

As of September 30, 2023 the maximum length of time that AEP is hedging its exposure to variability in future cash flows related to forecasted transactions is 90 months.

Impact of Cash Flow Hedges on the Registrant Subsidiaries’ Balance Sheets

	September 30, 2023				December 31, 2022
	Interest Rate
			Expected to be				Expected to be
			Reclassified to				Reclassified to
			Net Income During				Net Income During
	AOCI Gain (Loss)		the Next		AOCI Gain (Loss)		the Next
Company	Net of Tax		Twelve Months		Net of Tax		Twelve Months
	(in millions)
AEP Texas	$	2.8	$	0.3	$	(0.3)	$	(0.2)
APCo	6.1		0.8		6.7		0.8
I&M	(5.6)		(0.4)		(5.1)		(0.6)
PSO	(0.2)		—		1.3		0.1
SWEPCo	1.4		0.3		1.1		0.2

The actual amounts reclassified from Accumulated Other Comprehensive Income (Loss) to Net Income can differ from the estimate above due to market price changes.

Credit Risk

Management mitigates credit risk in wholesale marketing and trading activities by assessing the creditworthiness of potential counterparties before entering into transactions with them and continuing to evaluate their creditworthiness on an ongoing basis. Management uses credit agency ratings and current market-based qualitative and quantitative data as well as financial statements to assess the financial health of counterparties on an ongoing basis.

Master agreements are typically used to facilitate the netting of cash flows associated with a single counterparty and may include collateral requirements. Collateral requirements in the form of cash, letters of credit and parental/affiliate guarantees may be obtained as security from counterparties in order to mitigate credit risk. Some master agreements include margining, which requires a counterparty to post cash or letters of credit in the event exposure exceeds the established threshold. The threshold represents an unsecured credit limit which may be supported by a parental/affiliate guaranty, as determined in accordance with AEP’s credit policy. In addition, master agreements allow for termination and liquidation of all positions in the event of a default including a failure or inability to post collateral when required.

Credit-Risk-Related Contingent Features

Credit Downgrade Triggers (Applies to AEP, APCo, I&M, PSO and SWEPCo)

A limited number of derivative contracts include collateral triggering events, which include a requirement to maintain certain credit ratings.  On an ongoing basis, AEP’s risk management organization assesses the appropriateness of these collateral triggering events in contracts.  The Registrants have not experienced a downgrade below a specified credit rating threshold that would require the posting of additional collateral.  AEP had derivative contracts with collateral triggering events in a net liability position with a total exposure of $0 and $2 million as of September 30, 2023 and December 31, 2022, respectively. The Registrant Subsidiaries had no derivative contracts with collateral triggering events in a net liability position as of September 30, 2023 and December 31, 2022.

Cross-Acceleration Triggers

Certain interest rate derivative contracts contain cross-acceleration provisions that, if triggered, would permit the counterparty to declare a default and require settlement of the outstanding payable. These cross-acceleration provisions could be triggered if there was a non-performance event by the Registrants under any of their outstanding debt of at least $50 million and the lender on that debt has accelerated the entire repayment obligation. On an ongoing basis, AEP’s risk management organization assesses the appropriateness of these cross-acceleration provisions in contracts. AEP had derivative contracts with cross-acceleration provisions in a net liability position of $138 million and $127 million as of September 30, 2023 and December 31, 2022, respectively. There was no cash collateral posted as of September 30, 2023 and December 31, 2022. If a cross-acceleration provision would have been triggered, settlement at fair value would have been required. The Registrant Subsidiaries had no derivative contracts with cross-acceleration provisions outstanding as of September 30, 2023 and December 31, 2022.

Cross-Default Triggers (Applies to AEP, APCo, I&M, PSO and SWEPCo)

In addition, a majority of non-exchange traded commodity contracts contain cross-default provisions that, if triggered, would permit the counterparty to declare a default and require settlement of the outstanding payable. These cross-default provisions could be triggered if there was a non-performance event by Parent or the obligor under outstanding debt or a third-party obligation that is $50 million or greater.  On an ongoing basis, AEP’s risk management organization assesses the appropriateness of these cross-default provisions in the contracts. AEP had derivative contracts subject to cross-default provisions in a net liability position of $165 million and $217 million as of September 30, 2023 and December 31, 2022, respectively, after considering contractual netting arrangements. There was no cash collateral posted as of September 30, 2023 and December 31, 2022. If a cross-default provision would have been triggered, settlement at fair value would have been required. The Registrant Subsidiaries’ derivative contracts with cross-default provisions outstanding as of September 30, 2023 and December 31, 2022 were not material.

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Fair Value Measurements

9 Months Ended

Sep. 30, 2023

Fair Value Measurements

FAIR VALUE MEASUREMENTS

The disclosures in this note apply to all Registrants except AEPTCo unless indicated otherwise.

Fair Value Hierarchy and Valuation Techniques

The accounting guidance for “Fair Value Measurements and Disclosures” establishes a fair value hierarchy that prioritizes the inputs used to measure fair value.  The hierarchy gives the highest priority to unadjusted quoted prices in active markets for identical assets or liabilities (Level 1 measurement) and the lowest priority to unobservable inputs (Level 3 measurement).  Where observable inputs are available for substantially the full term of the asset or liability, the instrument is categorized in Level 2.  When quoted market prices are not available, pricing may be completed using comparable securities, dealer values, operating data and general market conditions to determine fair value.  Valuation models utilize various inputs such as commodity, interest rate and, to a lesser degree, volatility and credit that include quoted prices for similar assets or liabilities in active markets, quoted prices for identical or similar assets or liabilities in inactive markets, market corroborated inputs (i.e. inputs derived principally from, or correlated to, observable market data) and other observable inputs for the asset or liability.

For commercial activities, exchange-traded derivatives, namely futures contracts, are generally fair valued based on unadjusted quoted prices in active markets and are classified as Level 1.  Level 2 inputs primarily consist of OTC broker quotes in moderately active or less active markets, as well as exchange-traded derivatives where there is insufficient market liquidity to warrant inclusion in Level 1.  Management verifies price curves using these broker quotes and classifies these fair values within Level 2 when substantially all of the fair value can be corroborated.  Management typically obtains multiple broker quotes, which are nonbinding in nature but are based on recent trades in the marketplace.  When multiple broker quotes are obtained, the quoted bid and ask prices are averaged.  In certain circumstances, a broker quote may be discarded if it is a clear outlier.  Management uses a historical correlation analysis between the broker quoted location and the illiquid locations.  If the points are highly correlated, these locations are included within Level 2 as well.  Certain OTC and bilaterally executed derivative instruments are executed in less active markets with a lower availability of pricing information.  Illiquid transactions, complex structured transactions, FTRs and counterparty credit risk may require nonmarket-based inputs.  Some of these inputs may be internally developed or extrapolated and utilized to estimate fair value.  When such inputs have a significant impact on the measurement of fair value, the instrument is categorized as Level 3.  The main driver of contracts being classified as Level 3 is the inability to substantiate energy price curves in the market.  A portion of the Level 3 instruments have been economically hedged which limits potential earnings volatility.

AEP utilizes its trustee’s external pricing service to estimate the fair value of the underlying investments held in the nuclear trusts.  AEP’s investment managers review and validate the prices utilized by the trustee to determine fair value.  AEP’s management performs its own valuation testing to verify the fair values of the securities.  AEP receives audit reports of the trustee’s operating controls and valuation processes.

Assets in the nuclear trusts, cash and cash equivalents, other temporary investments restricted cash for securitized funding are classified using the following methods.  Equities are classified as Level 1 holdings if they are actively traded on exchanges.  Items classified as Level 1 are investments in money market funds, fixed income and equity mutual funds and equity securities.  They are valued based on observable inputs, primarily unadjusted quoted prices in active markets for identical assets.  Items classified as Level 2 are primarily investments in individual fixed income securities.  Fixed income securities generally do not trade on exchanges and do not have an official closing price but their valuation inputs are based on observable market data.  Pricing vendors calculate bond valuations using financial models and matrices.  The models use observable inputs including yields on benchmark securities, quotes by securities brokers, rating agency actions, discounts or premiums on securities compared to par prices, changes in yields for U.S. Treasury securities, corporate actions by bond issuers, prepayment schedules and histories, economic events and, for certain securities, adjustments to yields to reflect changes in the rate of inflation.  Other securities with model-derived valuation inputs that are observable are also classified as Level 2 investments.  Investments with unobservable valuation inputs are classified as Level 3 investments.

Fair Value Measurements of Long-term Debt (Applies to all Registrants)

The fair values of Long-term Debt are based on quoted market prices, without credit enhancements, for the same or similar issues and the current interest rates offered for instruments with similar maturities classified as Level 2 measurement inputs.  These instruments are not marked-to-market.  The estimates presented are not necessarily indicative of the amounts that could be realized in a current market exchange. The fair value of AEP’s Equity Units (Level 1) are valued based on publicly traded securities issued by AEP.

The book values and fair values of Long-term Debt are summarized in the following table:

	September 30, 2023				December 31, 2022
Company	Book Value		Fair Value		Book Value		Fair Value
	(in millions)
AEP (a)	$	39,489.1	$	33,559.8	$	36,801.0	$	32,915.9
AEP Texas	5,926.7		4,963.8		5,657.8		5,045.8
AEPTCo	5,473.7		4,270.8		4,782.8		3,940.5
APCo	5,587.3		4,901.4		5,410.5		5,079.2
I&M	3,443.6		2,920.6		3,260.8		2,929.0
OPCo	3,366.2		2,645.2		2,970.3		2,516.6
PSO	2,384.2		1,942.5		1,912.8		1,635.8
SWEPCo	3,646.2		2,944.8		3,391.6		2,870.9

(a)The fair value amounts include debt related to AEP’s Equity Units and had a fair value of $0 and $877 million as of September 30, 2023 and December 31, 2022, respectively. See “Equity Units” section of Note 12 for additional information.

Fair Value Measurements of Other Temporary Investments and Restricted Cash (Applies to AEP)

Other Temporary Investments include marketable securities that management intends to hold for less than one year and investments by AEP’s protected cell of EIS.

The following is a summary of Other Temporary Investments and Restricted Cash:

	September 30, 2023
			Gross		Gross
			Unrealized		Unrealized		Fair
Other Temporary Investments and Restricted Cash	Cost		Gains		Losses		Value
	(in millions)
Restricted Cash (a)	$	53.8	$	—	$	—	$	53.8
Other Cash Deposits	13.4		—		—		13.4
Fixed Income Securities – Mutual Funds (b)	170.4		—		(10.4)		160.0
Equity Securities – Mutual Funds	15.0		22.6		—		37.6
Total Other Temporary Investments and Restricted Cash	$	252.6	$	22.6	$	(10.4)	$	264.8

	December 31, 2022
			Gross		Gross
			Unrealized		Unrealized		Fair
Other Temporary Investments and Restricted Cash	Cost		Gains		Losses		Value
	(in millions)
Restricted Cash (a)	$	47.1	$	—	$	—	$	47.1
Other Cash Deposits	9.0		—		—		9.0
Fixed Income Securities – Mutual Funds (b)	152.4		—		(8.3)		144.1
Equity Securities – Mutual Funds	15.1		19.4		—		34.5
Total Other Temporary Investments and Restricted Cash	$	223.6	$	19.4	$	(8.3)	$	234.7

(a)Primarily represents amounts held for the repayment of debt.

(b)Primarily short and intermediate maturities which may be sold and do not contain maturity dates.

The following table provides the activity for fixed income and equity securities within Other Temporary Investments:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2023		2022		2023		2022
	(in millions)
Proceeds from Investment Sales	$	0.8	$	—	$	0.8	$	15.0
Purchases of Investments	14.6		11.8		16.9		13.4
Gross Realized Gains on Investment Sales	0.3		—		0.3		3.6
Gross Realized Losses on Investment Sales	—		—		—		0.5

Fair Value Measurements of Trust Assets for Decommissioning and SNF Disposal (Applies to AEP and I&M)

Nuclear decommissioning and SNF trust funds represent funds that regulatory commissions allow I&M to collect through rates to fund future decommissioning and SNF disposal liabilities.  By rules or orders, the IURC, the MPSC and the FERC established investment limitations and general risk management guidelines.  In general, limitations include:

•Acceptable investments (rated investment grade or above when purchased).

•Maximum percentage invested in a specific type of investment.

•Prohibition of investment in obligations of AEP, I&M or their affiliates.

•Withdrawals permitted only for payment of decommissioning costs and trust expenses.

I&M maintains trust funds for each regulatory jurisdiction.  Regulatory approval is required to withdraw decommissioning funds.  These funds are managed by an external investment manager that must comply with the guidelines and rules of the applicable regulatory authorities. The trust assets are invested to optimize the net of tax earnings of the trust giving consideration to liquidity, risk, diversification and other prudent investment objectives.

I&M records securities held in these trust funds in Spent Nuclear Fuel and Decommissioning Trusts on its balance sheets.  I&M records these securities at fair value.  I&M classifies debt securities in the trust funds as available-for-sale due to their long-term purpose.

Other-than-temporary impairments for investments in debt securities are considered realized losses as a result of securities being managed by an external investment management firm.  The external investment management firm makes specific investment decisions regarding the debt and equity investments held in these trusts and generally intends to sell debt securities in an unrealized loss position as part of a tax optimization strategy.  Impairments

reduce the cost basis of the securities which will affect any future unrealized gain or realized gain or loss due to the adjusted cost of investment.  I&M records unrealized gains, unrealized losses and other-than-temporary impairments from securities in these trust funds as adjustments to the regulatory liability account for the nuclear decommissioning trust funds and to regulatory assets or liabilities for the SNF disposal trust funds in accordance with their treatment in rates.  Consequently, changes in fair value of trust assets do not affect earnings or AOCI.

The following is a summary of nuclear trust fund investments:

	September 30, 2023								December 31, 2022
			Gross		Gross		Other-Than-				Gross		Gross		Other-Than-
	Fair		Unrealized		Unrealized		Temporary		Fair		Unrealized		Unrealized		Temporary
	Value		Gains		Losses		Impairments		Value		Gains		Losses		Impairments
	(in millions)
Cash and Cash Equivalents	$	20.5	$	—	$	—	$	—	$	21.2	$	—	$	—	$	—
Fixed Income Securities:
United States Government	1,204.7		0.6		(30.8)		(38.5)		1,123.8		11.8		(14.9)		(18.8)
Corporate Debt	136.8		0.4		(12.4)		(5.3)		61.6		0.7		(7.7)		(9.6)
State and Local Government	3.2		—		—		—		3.3		0.1		—		(0.1)
Subtotal Fixed Income Securities	1,344.7		1.0		(43.2)		(43.8)		1,188.7		12.6		(22.6)		(28.5)
Equity Securities - Domestic	2,174.5		1,620.5		(1.9)		—		2,131.3		1,483.7		(6.4)		—
Spent Nuclear Fuel and Decommissioning Trusts	$	3,539.7	$	1,621.5	$	(45.1)	$	(43.8)	$	3,341.2	$	1,496.3	$	(29.0)	$	(28.5)

The following table provides the securities activity within the decommissioning and SNF trusts:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2023		2022		2023		2022
	(in millions)
Proceeds from Investment Sales	$	933.0	$	588.5	$	2,139.3	$	1,818.4
Purchases of Investments	949.5		601.6		2,182.8		1,854.8
Gross Realized Gains on Investment Sales	36.8		24.6		91.6		41.3
Gross Realized Losses on Investment Sales	7.7		8.4		20.0		33.5

The base cost of fixed income securities was $1.4 billion and $1.2 billion as of September 30, 2023 and December 31, 2022, respectively.  The base cost of equity securities was $556 million and $654 million as of September 30, 2023 and December 31, 2022, respectively.

The fair value of fixed income securities held in the nuclear trust funds, summarized by contractual maturities, as of September 30, 2023 was as follows:

	Fair Value of Fixed
	Income Securities
	(in millions)
Within 1 year	$	393.6
After 1 year through 5 years	504.4
After 5 years through 10 years	188.6
After 10 years	258.1
Total	$	1,344.7

Fair Value Measurements of Financial Assets and Liabilities

The following tables set forth, by level within the fair value hierarchy, the Registrants’ financial assets and liabilities that were accounted for at fair value on a recurring basis.  As required by the accounting guidance for “Fair Value Measurements and Disclosures,” financial assets and liabilities are classified in their entirety based on the lowest level of input that is significant to the fair value measurement.  Management’s assessment of the significance of a particular input to the fair value measurement requires judgment and may affect the valuation of fair value assets and liabilities and their placement within the fair value hierarchy levels.  There have not been any significant changes in management’s valuation techniques.

AEP

Assets and Liabilities Measured at Fair Value on a Recurring Basis

September 30, 2023

	Level 1		Level 2		Level 3		Other		Total
Assets:	(in millions)
Other Temporary Investments and Restricted Cash
Restricted Cash	$	53.8	$	—	$	—	$	—	$	53.8
Other Cash Deposits (a)	—		—		—		13.4		13.4
Fixed Income Securities – Mutual Funds	160.0		—		—		—		160.0
Equity Securities – Mutual Funds (b)	37.6		—		—		—		37.6
Total Other Temporary Investments and Restricted Cash	251.4		—		—		13.4		264.8
Risk Management Assets
Risk Management Commodity Contracts (c) (d)	11.4		721.3		319.2		(627.4)		424.5
Cash Flow Hedges:
Commodity Hedges (c)	—		119.3		19.3		(10.2)		128.4
Total Risk Management Assets	11.4		840.6		338.5		(637.6)		552.9
Spent Nuclear Fuel and Decommissioning Trusts
Cash and Cash Equivalents (e)	10.0		—		—		10.5		20.5
Fixed Income Securities:
United States Government	—		1,204.7		—		—		1,204.7
Corporate Debt	—		136.8		—		—		136.8
State and Local Government	—		3.2		—		—		3.2
Subtotal Fixed Income Securities	—		1,344.7		—		—		1,344.7
Equity Securities – Domestic (b)	2,174.5		—		—		—		2,174.5
Total Spent Nuclear Fuel and Decommissioning Trusts	2,184.5		1,344.7		—		10.5		3,539.7
Total Assets	$	2,447.3	$	2,185.3	$	338.5	$	(613.7)	$	4,357.4
Liabilities:
Risk Management Liabilities
Risk Management Commodity Contracts (c) (d)	$	24.8	$	646.3	$	155.0	$	(534.9)	$	291.2
Cash Flow Hedges:
Commodity Hedges (c)	—		10.1		0.7		(10.2)		0.6
Fair Value Hedges	—		138.1		—		—		138.1
Total Risk Management Liabilities	$	24.8	$	794.5	$	155.7	$	(545.1)	$	429.9

AEP

Assets and Liabilities Measured at Fair Value on a Recurring Basis

December 31, 2022

	Level 1		Level 2		Level 3		Other		Total
Assets:	(in millions)
Other Temporary Investments and Restricted Cash
Restricted Cash	$	47.1	$	—	$	—	$	—	$	47.1
Other Cash Deposits (a)	—		—		—		9.0		9.0
Fixed Income Securities – Mutual Funds	144.1		—		—		—		144.1
Equity Securities – Mutual Funds (b)	34.5		—		—		—		34.5
Total Other Temporary Investments and Restricted Cash	225.7		—		—		9.0		234.7
Risk Management Assets
Risk Management Commodity Contracts (c) (f)	15.0		1,197.5		314.4		(1,211.5)		315.4
Cash Flow Hedges:
Commodity Hedges (c)	—		332.6		26.7		(52.8)		306.5
Interest Rate Hedges	—		11.0		—		—		11.0
Total Risk Management Assets	15.0		1,541.1		341.1		(1,264.3)		632.9
Spent Nuclear Fuel and Decommissioning Trusts
Cash and Cash Equivalents (e)	11.3		—		—		9.9		21.2
Fixed Income Securities:
United States Government	—		1,123.8		—		—		1,123.8
Corporate Debt	—		61.6		—		—		61.6
State and Local Government	—		3.3		—		—		3.3
Subtotal Fixed Income Securities	—		1,188.7		—		—		1,188.7
Equity Securities – Domestic (b)	2,131.3		—		—		—		2,131.3
Total Spent Nuclear Fuel and Decommissioning Trusts	2,142.6		1,188.7		—		9.9		3,341.2
Total Assets	$	2,383.3	$	2,729.8	$	341.1	$	(1,245.4)	$	4,208.8
Liabilities:
Risk Management Liabilities
Risk Management Commodity Contracts (c) (f)	$	21.8	$	870.9	$	179.0	$	(731.9)	$	339.8
Cash Flow Hedges:
Commodity Hedges (c)	—		74.3		1.7		(52.8)		23.2
Fair Value Hedges	—		127.4		—		—		127.4
Total Risk Management Liabilities	$	21.8	$	1,072.6	$	180.7	$	(784.7)	$	490.4

AEP Texas

Assets and Liabilities Measured at Fair Value on a Recurring Basis

September 30, 2023

	Level 1		Level 2		Level 3		Other		Total
Assets:	(in millions)
Restricted Cash for Securitized Funding	$	46.9	$	—	$	—	$	—	$	46.9
Risk Management Assets
Risk Management Commodity Contracts (g)	—		0.4		—		—		0.4
Total Assets	$	46.9	$	0.4	$	—	$	—	$	47.3

December 31, 2022

	Level 1		Level 2		Level 3		Other		Total
Assets:	(in millions)
Restricted Cash for Securitized Funding	$	32.7	$	—	$	—	$	—	$	32.7

APCo

Assets and Liabilities Measured at Fair Value on a Recurring Basis

September 30, 2023

	Level 1		Level 2		Level 3		Other		Total
Assets:	(in millions)
Restricted Cash for Securitized Funding	$	6.9	$	—	$	—	$	—	$	6.9
Risk Management Assets
Risk Management Commodity Contracts (c) (g)	—		3.8		45.2		(2.4)		46.6
Total Assets	$	6.9	$	3.8	$	45.2	$	(2.4)	$	53.5
Liabilities:
Risk Management Liabilities
Risk Management Commodity Contracts (c) (g)	$	—	$	5.0	$	0.1	$	(2.4)	$	2.7

December 31, 2022

	Level 1		Level 2		Level 3		Other		Total
Assets:	(in millions)
Restricted Cash for Securitized Funding	$	14.4	$	—	$	—	$	—	$	14.4
Risk Management Assets
Risk Management Commodity Contracts (c) (g)	—		0.7		69.4		(1.0)		69.1
Total Assets	$	14.4	$	0.7	$	69.4	$	(1.0)	$	83.5
Liabilities:
Risk Management Liabilities
Risk Management Commodity Contracts (c) (g)	$	—	$	4.6	$	0.3	$	(1.4)	$	3.5

I&M

Assets and Liabilities Measured at Fair Value on a Recurring Basis

September 30, 2023

	Level 1		Level 2		Level 3		Other		Total
Assets:	(in millions)
Risk Management Assets
Risk Management Commodity Contracts (c) (g)	$	—	$	18.1	$	7.9	$	(4.8)	$	21.2
Spent Nuclear Fuel and Decommissioning Trusts
Cash and Cash Equivalents (e)	10.0		—		—		10.5		20.5
Fixed Income Securities:
United States Government	—		1,204.7		—		—		1,204.7
Corporate Debt	—		136.8		—		—		136.8
State and Local Government	—		3.2		—		—		3.2
Subtotal Fixed Income Securities	—		1,344.7		—		—		1,344.7
Equity Securities - Domestic (b)	2,174.5		—		—		—		2,174.5
Total Spent Nuclear Fuel and Decommissioning Trusts	2,184.5		1,344.7		—		10.5		3,539.7
Total Assets	$	2,184.5	$	1,362.8	$	7.9	$	5.7	$	3,560.9
Liabilities:
Risk Management Liabilities
Risk Management Commodity Contracts (c) (g)	$	—	$	4.2	$	1.3	$	(4.4)	$	1.1

December 31, 2022

	Level 1		Level 2		Level 3		Other		Total
Assets:	(in millions)
Risk Management Assets
Risk Management Commodity Contracts (c) (g)	$	—	$	11.3	$	5.3	$	(1.2)	$	15.4
Spent Nuclear Fuel and Decommissioning Trusts
Cash and Cash Equivalents (e)	11.3		—		—		9.9		21.2
Fixed Income Securities:
United States Government	—		1,123.8		—		—		1,123.8
Corporate Debt	—		61.6		—		—		61.6
State and Local Government	—		3.3		—		—		3.3
Subtotal Fixed Income Securities	—		1,188.7		—		—		1,188.7
Equity Securities - Domestic (b)	2,131.3		—		—		—		2,131.3
Total Spent Nuclear Fuel and Decommissioning Trusts	2,142.6		1,188.7		—		9.9		3,341.2
Total Assets	$	2,142.6	$	1,200.0	$	5.3	$	8.7	$	3,356.6
Liabilities:
Risk Management Liabilities
Risk Management Commodity Contracts (c) (g)	$	—	$	0.6	$	0.7	$	(1.3)	$	—

OPCo

Assets and Liabilities Measured at Fair Value on a Recurring Basis

September 30, 2023

	Level 1		Level 2		Level 3		Other		Total
Assets:	(in millions)
Risk Management Assets
Risk Management Commodity Contracts (g)	$	—	$	0.3	$	—	$	—	$	0.3
Liabilities:
Risk Management Liabilities
Risk Management Commodity Contracts (g)	$	—	$	—	$	51.6	$	—	$	51.6

December 31, 2022

	Level 1		Level 2		Level 3		Other		Total
Liabilities:	(in millions)
Risk Management Liabilities
Risk Management Commodity Contracts (c) (g)	$	—	$	—	$	40.0	$	(0.3)	$	39.7

PSO

Assets and Liabilities Measured at Fair Value on a Recurring Basis

September 30, 2023

	Level 1		Level 2		Level 3		Other		Total
Assets:	(in millions)
Risk Management Assets
Risk Management Commodity Contracts (c) (g)	$	—	$	0.5	$	28.1	$	(0.4)	$	28.2
Liabilities:
Risk Management Liabilities
Risk Management Commodity Contracts (c) (g)	$	—	$	6.6	$	0.9	$	(0.3)	$	7.2

December 31, 2022

	Level 1		Level 2		Level 3		Other		Total
Assets:	(in millions)
Risk Management Assets
Risk Management Commodity Contracts (c) (g)	$	—	$	—	$	24.0	$	1.3	$	25.3
Cash Flow Hedges:
Interest Rate Hedges	—		1.6		—		(1.6)		—
Total Assets	$	—	$	1.6	$	24.0	$	(0.3)	$	25.3
Liabilities:
Risk Management Liabilities
Risk Management Commodity Contracts (c) (g)	$	—	$	1.7	$	0.3	$	(0.4)	$	1.6

SWEPCo

Assets and Liabilities Measured at Fair Value on a Recurring Basis

September 30, 2023

	Level 1		Level 2		Level 3		Other		Total
Assets:	(in millions)
Risk Management Assets
Risk Management Commodity Contracts (c) (g)	$	—	$	0.2	$	17.4	$	(0.5)	$	17.1
Liabilities:
Risk Management Liabilities
Risk Management Commodity Contracts (c) (g)	$	—	$	3.1	$	0.9	$	(0.5)	$	3.5

December 31, 2022

	Level 1		Level 2		Level 3		Other		Total
Assets:	(in millions)
Risk Management Assets
Risk Management Commodity Contracts (c) (g)	$	—	$	2.2	$	14.6	$	(0.4)	$	16.4
Liabilities:
Risk Management Liabilities
Risk Management Commodity Contracts (c) (g)	$	—	$	1.6	$	0.4	$	(0.6)	$	1.4

(a)Amounts in “Other’’ column primarily represent cash deposits in bank accounts with financial institutions or third-parties.  Level 1 and Level 2 amounts primarily represent investments in money market funds.

(b)Amounts represent publicly traded equity securities and equity-based mutual funds.

(c)Amounts in “Other’’ column primarily represent counterparty netting of risk management and hedging contracts and associated cash collateral under the accounting guidance for “Derivatives and Hedging.’’

(d)The September 30, 2023 maturities of the net fair value of risk management contracts prior to cash collateral, assets/(liabilities), were as follows: Level 1 matures $(4) million in 2023 and $(9) million in periods 2024-2026; Level 2 matures $64 million in periods 2024-2026, $10 million in periods 2027-2028 and $1 million in periods 2029-2033; Level 3 matures $37 million in 2023, $118 million in periods 2024-2026, $18 million in periods 2027-2028 and $(9) million in periods 2029-2033.  Risk management commodity contracts are substantially comprised of power contracts.

(e)Amounts in “Other’’ column primarily represent accrued interest receivables from financial institutions.  Level 1 amounts primarily represent investments in money market funds.

(f)The December 31, 2022 maturities of the net fair value of risk management contracts prior to cash collateral, assets/(liabilities), were as follows: Level 1 matures $(7) million in 2023; Level 2 matures $182 million in 2023, $134 million in periods 2024-2026, $10 million in periods 2027-2028 and $1 million in periods 2029-2033; Level 3 matures $128 million in 2023, $6 million in periods 2024-2026, $6 million in periods 2027-2028 and $(5) million in periods 2029-2033.  Risk management commodity contracts are substantially comprised of power contracts.

(g)Substantially comprised of power contracts for the Registrant Subsidiaries.

The following tables set forth a reconciliation of changes in the fair value of net trading derivatives classified as Level 3 in the fair value hierarchy:

Three Months Ended September 30, 2023	AEP		APCo		I&M		OPCo		PSO		SWEPCo
	(in millions)
Balance as of June 30, 2023	$	126.1	$	39.4	$	6.8	$	(54.0)	$	43.1	$	26.0
Realized Gain (Loss) Included in Net Income (or Changes in Net Assets) (a) (b)	39.7		10.0		2.3		—		14.2		14.0
Unrealized Gain (Loss) Included in Net Income (or Changes in Net Assets) Relating to Assets Still Held at the Reporting Date (a)	72.7		—		—		—		—		—
Realized and Unrealized Gains (Losses) Included in Other Comprehensive Income (c)	4.9		—		—		—		—		—
Settlements	(87.1)		(16.5)		(3.7)		1.1		(30.5)		(24.8)
Transfers out of Level 3 (e)	6.6		0.1		(0.1)		—		—		—
Changes in Fair Value Allocated to Regulated Jurisdictions (f)	19.9		12.1		1.3		1.3		0.4		1.3
Balance as of September 30, 2023	$	182.8	$	45.1	$	6.6	$	(51.6)	$	27.2	$	16.5

Three Months Ended September 30, 2022	AEP		APCo		I&M		OPCo		PSO		SWEPCo
	(in millions)
Balance as of June 30, 2022	$	283.9	$	79.6	$	9.8	$	(48.4)	$	64.5	$	45.4
Realized Gain (Loss) Included in Net Income (or Changes in Net Assets) (a) (b)	64.3		20.1		2.1		0.3		23.8		15.4
Unrealized Gain (Loss) Included in Net Income (or Changes in Net Assets) Relating to Assets Still Held at the Reporting Date (a)	(12.6)		—		—		—		—		—
Realized and Unrealized Gains (Losses) Included in Other Comprehensive Income (c)	13.1		—		—		—		—		—
Settlements	(138.3)		(34.6)		(4.8)		(1.1)		(49.1)		(31.6)
Transfers into Level 3 (d) (e)	(0.5)		—		—		—		—		—
Transfers out of Level 3 (e)	3.5		—		—		—		—		—
Changes in Fair Value Allocated to Regulated Jurisdictions (f)	72.5		41.5		2.5		6.0		5.2		7.0
Balance as of September 30, 2022	$	285.9	$	106.6	$	9.6	$	(43.2)	$	44.4	$	36.2

Nine Months Ended September 30, 2023	AEP		APCo		I&M		OPCo		PSO		SWEPCo
	(in millions)
Balance as of December 31, 2022	$	160.4	$	69.1	$	4.6	$	(40.0)	$	23.7	$	14.2
Realized Gain (Loss) Included in Net Income (or Changes in Net Assets) (a) (b)	(41.3)		(47.0)		(1.7)		(2.4)		3.5		5.9
Unrealized Gain (Loss) Included in Net Income (or Changes in Net Assets) Relating to Assets Still Held at the Reporting Date (a)	67.7		—		—		—		—		—
Realized and Unrealized Gains (Losses) Included in Other Comprehensive Income (c)	(10.5)		—		—		—		—		—
Settlements	(85.9)		(22.1)		(2.9)		3.5		(27.2)		(20.0)
Transfers into Level 3 (d) (e)	(6.1)		—		—		—		—		—
Transfers out of Level 3 (e)	3.8		—		—		—		—		—
Changes in Fair Value Allocated to Regulated Jurisdictions (f)	94.7		45.1		6.6		(12.7)		27.2		16.4
Balance as of September 30, 2023	$	182.8	$	45.1	$	6.6	$	(51.6)	$	27.2	$	16.5

Nine Months Ended September 30, 2022	AEP		APCo		I&M		OPCo		PSO		SWEPCo
	(in millions)
Balance as of December 31, 2021	$	103.1	$	41.7	$	(0.7)	$	(92.5)	$	12.1	$	10.9
Realized Gain (Loss) Included in Net Income (or Changes in Net Assets) (a) (b)	69.3		3.0		3.7		4.6		24.2		35.8
Unrealized Gain (Loss) Included in Net Income (or Changes in Net Assets) Relating to Assets Still Held at the Reporting Date (a)	(44.6)		—		—		—		—		—
Realized and Unrealized Gains (Losses) Included in Other Comprehensive Income (c)	29.4		—		—		—		—		—
Settlements	(153.8)		(44.7)		(3.0)		0.2		(36.3)		(45.0)
Transfers into Level 3 (d) (e)	1.7		—		—		—		—		—
Transfers out of Level 3 (e)	13.2		—		—		—		—		—
Changes in Fair Value Allocated to Regulated Jurisdictions (f)	267.6		106.6		9.6		44.5		44.4		34.5
Balance as of September 30, 2022	$	285.9	$	106.6	$	9.6	$	(43.2)	$	44.4	$	36.2

(a)Included in revenues on the statements of income.

(b)Represents the change in fair value between the beginning of the reporting period and the settlement of the risk management commodity contract.

(c)Included in cash flow hedges on the statements of comprehensive income.

(d)Represents existing assets or liabilities that were previously categorized as Level 2.

(e)Transfers are recognized based on their value at the beginning of the reporting period that the transfer occurred.

(f)Relates to the net gains (losses) of those contracts that are not reflected on the statements of income.  These changes in fair value are recorded as regulatory liabilities for net gains and as regulatory assets for net losses or accounts payable.

The following tables quantify the significant unobservable inputs used in developing the fair value of Level 3 positions:

Significant Unobservable Inputs

September 30, 2023

							Significant	Input/Range
	Type of	Fair Value				Valuation	Unobservable					Weighted
Company	Input	Assets		Liabilities		Technique	Input	Low		High		Average (c)
		(in millions)
AEP	Energy Contracts	$	224.3	$	147.7	Discounted Cash Flow	Forward Market Price (a)	$	5.98	$	137.52	$	45.43
AEP	Natural Gas Contracts	—		0.2		Discounted Cash Flow	Forward Market Price (b)	3.55		3.55		3.55
AEP	FTRs	114.2		7.8		Discounted Cash Flow	Forward Market Price (a)	(17.92)		17.07		0.29
APCo	FTRs	45.2		0.1		Discounted Cash Flow	Forward Market Price (a)	(3.92)		9.08		1.63
I&M	FTRs	7.9		1.3		Discounted Cash Flow	Forward Market Price (a)	(4.36)		9.08		1.08
OPCo	Energy Contracts	—		51.6		Discounted Cash Flow	Forward Market Price (a)	19.89		65.40		41.66
PSO	FTRs	28.1		0.9		Discounted Cash Flow	Forward Market Price (a)	(17.92)		2.04		(4.42)
SWEPCo	Natural Gas Contracts	—		0.2		Discounted Cash Flow	Forward Market Price (b)	3.55		3.55		3.55
SWEPCo	FTRs	17.4		0.7		Discounted Cash Flow	Forward Market Price (a)	(17.92)		2.04		(4.42)

December 31, 2022

							Significant	Input/Range
	Type of	Fair Value				Valuation	Unobservable					Weighted
Company	Input	Assets		Liabilities		Technique	Input (a)	Low		High		Average (c)
		(in millions)
AEP	Energy Contracts	$	204.0	$	167.4	Discounted Cash Flow	Forward Market Price	$	2.91	$	187.34	$	49.14
AEP	FTRs	137.1		13.3		Discounted Cash Flow	Forward Market Price	(36.45)		20.72		1.18
APCo	FTRs	69.4		0.3		Discounted Cash Flow	Forward Market Price	(2.82)		18.88		3.89
I&M	FTRs	5.3		0.7		Discounted Cash Flow	Forward Market Price	0.16		18.79		1.23
OPCo	Energy Contracts	—		40.0		Discounted Cash Flow	Forward Market Price	2.91		187.34		48.76
PSO	FTRs	24.0		0.3		Discounted Cash Flow	Forward Market Price	(36.45)		3.40		(7.55)
SWEPCo	FTRs	14.6		0.4		Discounted Cash Flow	Forward Market Price	(36.45)		3.40		(7.55)

(a)Represents market prices in dollars per MWh.

(b)Represents market prices in dollars per MMBtu.

(c)The weighted average is the product of the forward market price of the underlying commodity and volume weighted by term.

The following table provides the measurement uncertainty of fair value measurements to increases (decreases) in significant unobservable inputs related to Energy Contracts and FTRs for the Registrants as of September 30, 2023 and December 31, 2022:

Significant Unobservable Input	Position	Change in Input	Impact on Fair Value Measurement
Forward Market Price	Buy	Increase (Decrease)	Higher (Lower)
Forward Market Price	Sell	Increase (Decrease)	Lower (Higher)

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Income Taxes

9 Months Ended

Sep. 30, 2023

Income Taxes

INCOME TAXES

The disclosures in this note apply to all Registrants unless indicated otherwise.

Effective Tax Rates (ETR)

The Registrants’ interim ETR reflect the estimated annual ETR for 2023 and 2022, adjusted for tax expense associated with certain discrete items.

The Registrants include the amortization of Excess ADIT not subject to normalization requirements in the annual estimated ETR when regulatory proceedings instruct the Registrants to provide the benefits of Tax Reform to customers over multiple interim periods.  Certain regulatory proceedings instruct the Registrants to provide the benefits of Tax Reform to customers in a single period (e.g. by applying the Excess ADIT not subject to normalization requirements against an existing regulatory asset balance) and in these circumstances, the Registrants recognize the tax benefit discretely in the period recorded. The annual amount of Excess ADIT approved by the Registrant’s regulatory commissions may not impact the ETR ratably during each interim period due to the variability of pretax book income between interim periods and the application of an annual estimated ETR.

The ETR for each of the Registrants are included in the following tables:

	Three Months Ended September 30, 2023
	AEP		AEP Texas		AEPTCo		APCo		I&M		OPCo		PSO		SWEPCo
U.S. Federal Statutory Rate	21.0	%	21.0	%	21.0	%	21.0	%	21.0	%	21.0	%	21.0	%	21.0	%
Increase (decrease) due to:
State Income Tax, net of Federal Benefit	1.4	%	0.5	%	2.8	%	2.2	%	2.1	%	0.8	%	3.0	%	(4.3)	%
Tax Reform Excess ADIT Reversal	(5.7)	%	(1.3)	%	(0.2)	%	(5.3)	%	(8.5)	%	(6.8)	%	(17.0)	%	(6.2)	%
Production and Investment Tax Credits	(5.1)	%	0.1	%	—	%	(0.1)	%	(0.7)	%	—	%	(46.9)	%	(25.5)	%
Flow Through	0.1	%	0.2	%	0.3	%	1.8	%	0.7	%	0.8	%	0.3	%	(0.2)	%
AFUDC Equity	(1.4)	%	(1.4)	%	(2.4)	%	(1.5)	%	(0.5)	%	(0.8)	%	(1.6)	%	(0.8)	%
Discrete Tax Adjustments	(4.1)	%	—	%	—	%	—	%	—	%	—	%	—	%	—	%
Other	0.1	%	(0.5)	%	(1.0)	%	0.7	%	(3.5)	%	1.3	%	(0.2)	%	0.2	%
Effective Income Tax Rate	6.3	%	18.6	%	20.5	%	18.8	%	10.6	%	16.3	%	(41.4)	%	(15.8)	%

	Three Months Ended September 30, 2022
	AEP		AEP Texas		AEPTCo		APCo		I&M		OPCo		PSO		SWEPCo
U.S. Federal Statutory Rate	21.0	%	21.0	%	21.0	%	21.0	%	21.0	%	21.0	%	21.0	%	21.0	%
Increase (decrease) due to:
State Income Tax, net of Federal Benefit	(0.8)	%	0.5	%	2.6	%	(6.2)	%	2.7	%	0.7	%	3.0	%	(5.3)	%
Tax Reform Excess ADIT Reversal	(9.7)	%	(2.0)	%	0.3	%	(8.6)	%	(13.3)	%	(6.2)	%	(21.9)	%	(4.6)	%
Production and Investment Tax Credits	(12.0)	%	(0.4)	%	—	%	—	%	—	%	—	%	(43.7)	%	(24.1)	%
Flow Through	(0.3)	%	0.2	%	0.3	%	(0.7)	%	(1.5)	%	0.4	%	0.4	%	(1.3)	%
AFUDC Equity	(1.4)	%	(1.2)	%	(1.9)	%	(0.4)	%	(0.6)	%	(0.8)	%	(0.4)	%	(0.2)	%
Discrete Tax Adjustments	(0.2)	%	—	%	—	%	—	%	—	%	—	%	—	%	—	%
Other	1.0	%	0.2	%	0.2	%	—	%	(0.5)	%	0.2	%	0.2	%	(0.2)	%
Effective Income Tax Rate	(2.4)	%	18.3	%	22.5	%	5.1	%	7.8	%	15.3	%	(41.4)	%	(14.7)	%

	Nine Months Ended September 30, 2023
	AEP		AEP Texas		AEPTCo		APCo		I&M		OPCo		PSO		SWEPCo
U.S. Federal Statutory Rate	21.0	%	21.0	%	21.0	%	21.0	%	21.0	%	21.0	%	21.0	%	21.0	%
Increase (decrease) due to:
State Income Tax, net of Federal Benefit	1.7	%	0.5	%	2.7	%	2.4	%	2.3	%	0.9	%	2.8	%	(2.9)	%
Tax Reform Excess ADIT Reversal	(6.0)	%	(1.3)	%	0.1	%	(4.8)	%	(7.6)	%	(7.3)	%	(17.1)	%	(5.3)	%
Production and Investment Tax Credits	(7.4)	%	—	%	—	%	(0.1)	%	(0.6)	%	—	%	(48.9)	%	(26.7)	%
Flow Through	(0.2)	%	0.2	%	0.3	%	0.1	%	(1.7)	%	0.8	%	0.3	%	(0.3)	%
AFUDC Equity	(1.4)	%	(1.2)	%	(2.0)	%	(1.2)	%	(0.4)	%	(0.8)	%	(1.5)	%	(0.5)	%
Discrete Tax Adjustments	(2.8)	%	—	%	—	%	1.5	%	0.7	%	—	%	—	%	—	%
Other	0.3	%	(0.2)	%	(0.5)	%	0.4	%	(1.2)	%	0.5	%	(0.2)	%	0.2	%
Effective Income Tax Rate	5.2	%	19.0	%	21.6	%	19.3	%	12.5	%	15.1	%	(43.6)	%	(14.5)	%

	Nine Months Ended September 30, 2022
	AEP		AEP Texas		AEPTCo		APCo		I&M		OPCo		PSO		SWEPCo
U.S. Federal Statutory Rate	21.0	%	21.0	%	21.0	%	21.0	%	21.0	%	21.0	%	21.0	%	21.0	%
Increase (decrease) due to:
State Income Tax, net of Federal Benefit	0.7	%	0.5	%	2.7	%	(0.8)	%	1.3	%	0.8	%	3.2	%	(1.5)	%
Tax Reform Excess ADIT Reversal	(7.8)	%	(2.0)	%	0.3	%	(10.3)	%	(15.7)	%	(7.3)	%	(20.8)	%	(4.8)	%
Production and Investment Tax Credits	(8.7)	%	(0.4)	%	—	%	—	%	(1.4)	%	—	%	(39.5)	%	(22.5)	%
Flow Through	—	%	0.2	%	0.3	%	0.2	%	(1.6)	%	0.5	%	0.3	%	(0.8)	%
AFUDC Equity	(1.1)	%	(1.2)	%	(1.9)	%	(0.8)	%	(0.8)	%	(0.7)	%	(0.4)	%	(0.4)	%
Discrete Tax Adjustments	(0.2)	%	—	%	—	%	(1.8)	%	—	%	—	%	—	%	0.3	%
Other	0.6	%	0.1	%	0.1	%	—	%	0.2	%	0.1	%	0.2	%	—	%
Effective Income Tax Rate	4.5	%	18.2	%	22.5	%	7.5	%	3.0	%	14.4	%	(36.0)	%	(8.7)	%

Federal and State Income Tax Audit Status

The statute of limitations for the IRS to examine AEP and subsidiaries originally filed federal return has expired for tax years 2016 and earlier. AEP has agreed to extend the statute of limitations on the 2017-2019 tax returns to October 31, 2024, to allow time for the current IRS audit to be completed including a refund claim approval by the Congressional Joint Committee on Taxation. The statute of limitations for the 2020 return is set to naturally expire in October 2024 as well.

The current IRS audit and associated refund claim evolved from a net operating loss carryback to 2015 that originated in the 2017 return. AEP has received and agreed to immaterial IRS proposed adjustments on the 2017 tax return. The exam is nearly complete, and AEP is currently working with the IRS to submit the refund claim to the Congressional Joint Committee on Taxation for resolution and final approval.

AEP and subsidiaries file income tax returns in various state and local jurisdictions. These taxing authorities routinely examine the tax returns, and AEP and subsidiaries are currently under examination in several state and local jurisdictions. Generally, the statutes of limitations have expired for tax years prior to 2017. In addition, management is monitoring and continues to evaluate the potential impact of federal legislation and corresponding state conformity.

Federal Legislation

In August 2022, President Biden signed H.R. 5376 into law, commonly known as the Inflation Reduction Act of 2022, or IRA. Most notably this budget reconciliation legislation creates a 15% minimum tax on adjusted financial statement income (Corporate Alternative Minimum Tax or CAMT), extends and increases the value of PTCs and ITCs, adds a nuclear and clean hydrogen PTC, an energy storage ITC and allows the sale or transfer of tax credits to third parties for cash. As further significant guidance from Treasury and the IRS is expected on the tax provisions in the IRA, AEP will continue to monitor any issued guidance and evaluate the impact on future net income, cash flows and financial condition.

In December 2022, the IRS released Notice 2023-7, which provided initial CAMT guidance that AEP can begin to rely on in 2023. Notably, the interim guidance in Notice 2023-7 confirmed the CAMT depreciation adjustment includes tax depreciation that is capitalized to inventory under §263A and recovered as part of cost of goods sold, providing significant relief to AEP’s potential CAMT exposure. In September 2023, the IRS released Notice 2023-64, which clarifies and supplements items in Notice 2023-7 and stated that additional guidance in the form of proposed regulations is expected. AEP will continue to monitor and assess any additional guidance.

AEP and subsidiaries expect to be applicable corporations for purposes of the CAMT beginning in 2023. CAMT cash taxes are expected to be partially offset by regulatory recovery, the utilization of tax credits and additionally the cash inflow generated by the sale of tax credits. The sale of tax credits are presented in the operating section of the statements of cash flows consistent with the presentation of cash taxes paid. AEP presents the loss on sale of tax credits through income tax expense.

In June 2023, the IRS issued temporary regulations related to the transfer of tax credits. In the third quarter of 2023, AEP, on behalf of PSO and SWEPCo, entered into a transferability agreement with a nonaffiliated party to sell PTCs resulting in cash proceeds of approximately $80 million expected in the fourth quarter of 2023. AEP expects to continue to explore the ability to efficiently monetize its tax credits through third party transferability agreements.

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Financing Activities

9 Months Ended

Sep. 30, 2023

Financing Activities

FINANCING ACTIVITIES

The disclosures in this note apply to all Registrants, unless indicated otherwise.

Common Stock (Applies to AEP)

At-the-Market (ATM) Program

In 2020, AEP filed a prospectus supplement and executed an Equity Distribution Agreement, pursuant to which AEP may sell, from time to time, up to an aggregate of $1 billion of its common stock through an ATM offering program, including an equity forward sales component. The compensation paid to the selling agents by AEP may be up to 2% of the gross offering proceeds of the shares. There were no issuances under the ATM program for the nine months ended September 30, 2023.

Long-term Debt Outstanding (Applies to AEP)

The following table details long-term debt outstanding, net of issuance costs and premiums or discounts:

Type of Debt	September 30, 2023		December 31, 2022
	(in millions)
Senior Unsecured Notes	$	32,881.6	$	30,174.8
Pollution Control Bonds	1,771.0		1,770.2
Notes Payable	141.5		269.7
Securitization Bonds	407.0		487.8
Spent Nuclear Fuel Obligation (a)	296.3		285.6
Junior Subordinated Notes (b)	2,386.6		2,381.3
Other Long-term Debt	1,605.1		1,431.6
Total Long-term Debt Outstanding	39,489.1		36,801.0
Long-term Debt Due Within One Year	2,773.6		2,486.4
Long-term Debt	$	36,715.5	$	34,314.6

(a)Pursuant to the Nuclear Waste Policy Act of 1982, I&M, a nuclear licensee, has an obligation to the United States Department of Energy for SNF disposal. The obligation includes a one-time fee for nuclear fuel consumed prior to April 7, 1983. Trust fund assets related to this obligation were $345 million and $330 million as of September 30, 2023 and December 31, 2022, respectively, and are included in Spent Nuclear Fuel and Decommissioning Trusts on the balance sheets.

(b)See “Equity Units” section below for additional information.

Long-term Debt Activity

Long-term debt and other securities issued, retired and principal payments made during the first nine months of 2023 are shown in the following tables:

		Principal		Interest
Company	Type of Debt	Amount (a)		Rate	Due Date
Issuances:		(in millions)		(%)
AEP	Senior Unsecured Notes	$	850.0	5.63	2033
AEPTCo	Senior Unsecured Notes	700.0		5.40	2053
AEP Texas	Pollution Control Bonds	60.0		4.25	2030
AEP Texas	Senior Unsecured Notes	450.0		5.40	2033
APCo	Other Long-term Debt	200.0		Variable	2024
I&M	Senior Unsecured Notes	500.0		5.63	2053
OPCo	Senior Unsecured Notes	400.0		5.00	2033
PSO	Senior Unsecured Notes	475.0		5.25	2033
SWEPCo	Senior Unsecured Notes	350.0		5.30	2033
Non-Registrant:
KPCo	Pollution Control Bonds	65.0		4.70	2026
Transource Energy	Other Long-term Debt	14.0		Variable	2025
Total Issuances		$	4,064.0

(a)Amounts indicated on the statements of cash flows are net of issuance costs and premium or discount and will not tie to the issuance amounts.

		Principal		Interest
Company	Type of Debt	Amount Paid		Rate	Due Date
Retirements and Principal Payments:		(in millions)		(%)
AEP	Senior Unsecured Notes	$	600.0	Variable	2023
AEP Texas	Pollution Control Bonds	60.0		0.90	2023
AEP Texas	Senior Unsecured Notes	125.0		3.09	2023
AEP Texas	Securitization Bonds	31.5		2.85	2024
AEP Texas	Securitization Bonds	23.5		2.06	2025
APCo	Securitization Bonds	9.7		2.01	2023
APCo	Securitization Bonds	16.8		3.77	2028
I&M	Senior Unsecured Notes	250.0		3.20	2023
I&M	Notes Payable	1.8		Variable	2023
I&M	Notes Payable	3.7		Variable	2024
I&M	Notes Payable	13.8		Variable	2025
I&M	Notes Payable	12.0		0.93	2025
I&M	Notes Payable	20.6		3.44	2026
I&M	Notes Payable	20.5		5.93	2027
I&M	Other Long-term Debt	1.7		6.00	2025
OPCo	Other Long-term Debt	0.6		1.15	2028
PSO	Other Long-term Debt	0.4		3.00	2027
SWEPCo	Notes Payable	25.0		6.37	2024
SWEPCo	Notes Payable	30.9		4.58	2032
SWEPCo	Other Long-Term Debt	38.2		4.68	2028
Non-Registrant:
KPCo	Pollution Control Bonds	65.0		2.35	2023
Transource Energy	Senior Unsecured Notes	2.6		2.75	2050
Total Retirements and Principal Payments		$	1,353.3

Long-term Debt Subsequent Event

In October 2023, I&M retired $4 million of Notes Payable related to DCC Fuel.

In October 2023, Transource Energy issued $3.5 million of variable rate Other Long-term Debt due in 2025.

In November 2023, AEP retired $450 million of Senior Unsecured Notes.

Equity Units (Applies to AEP)

2020 Equity Units

In August 2020, AEP issued 17 million Equity Units initially in the form of corporate units, at a stated amount of $50 per unit, for a total stated amount of $850 million. Net proceeds from the issuance were approximately $833 million. The proceeds were used to support AEP’s overall capital expenditure plans.

Each corporate unit represents a 1/20 undivided beneficial ownership interest in $1,000 principal amount of AEP’s 1.30% Junior Subordinated Notes due in 2025 and a forward equity purchase contract which settled after three years in August 2023. In June 2023, AEP successfully remarketed the Junior Subordinated Notes on behalf of holders of the corporate units. AEP did not receive any proceeds from the remarketing which were used to purchase a portfolio of treasury securities that matured on August 14, 2023. On August 15, 2023, the proceeds from the treasury portfolio were used to settle the forward equity purchase contract with AEP. The interest rate on the Junior Subordinated Notes was reset to 5.699% with the maturity remaining in 2025. In August 2023, AEP issued 10,048,668 shares of AEP common stock and received proceeds totaling $850 million under the settlement of the forward equity purchase contract. AEP common stock held in treasury was used to settle the forward equity purchase contract. The proceeds were used to pay down debt balances and support AEP’s overall capital expenditure plans.

Debt Covenants (Applies to AEP and AEPTCo)

Covenants in AEPTCo’s note purchase agreements and indenture limit the amount of contractually-defined priority debt (which includes a further sub-limit of $50 million of secured debt) to 10% of consolidated tangible net assets. AEPTCo’s contractually-defined priority debt was 0.9% of consolidated tangible net assets as of September 30, 2023. The method for calculating the consolidated tangible net assets is contractually-defined in the note purchase agreements.

Dividend Restrictions

Utility Subsidiaries’ Restrictions

Parent depends on its utility subsidiaries to pay dividends to shareholders. AEP utility subsidiaries pay dividends to Parent provided funds are legally available. Various financing arrangements and regulatory requirements may impose certain restrictions on the ability of the subsidiaries to transfer funds to Parent in the form of dividends.

All of the dividends declared by AEP’s utility subsidiaries that provide transmission or local distribution services are subject to a Federal Power Act requirement that prohibits the payment of dividends out of capital accounts in certain circumstances; payment of dividends is generally allowed out of retained earnings. The Federal Power Act also creates a reserve on earnings attributable to hydroelectric generation plants. Because of their ownership of such plants, this reserve applies to APCo and I&M.

Certain AEP subsidiaries have credit agreements that contain covenants that limit their debt to capitalization ratio to 67.5%. The method for calculating outstanding debt and capitalization is contractually-defined in the credit agreements.

The Federal Power Act restriction does not limit the ability of the AEP subsidiaries to pay dividends out of retained earnings.

Parent Restrictions (Applies to AEP)

The holders of AEP’s common stock are entitled to receive the dividends declared by the Board of Directors provided funds are legally available for such dividends. Parent’s income primarily derives from common stock equity in the earnings of its utility subsidiaries.

Pursuant to the leverage restrictions in credit agreements, AEP must maintain a percentage of debt to total capitalization at a level that does not exceed 67.5%. The method for calculating outstanding debt and capitalization is contractually-defined in the credit agreements.

Corporate Borrowing Program - AEP System (Applies to all Registrant Subsidiaries)

The AEP System uses a corporate borrowing program to meet the short-term borrowing needs of AEP’s subsidiaries. The corporate borrowing program includes a Utility Money Pool, which funds AEP’s utility subsidiaries; a Nonutility Money Pool, which funds certain AEP nonutility subsidiaries; and direct borrowing from AEP. The AEP System Utility Money Pool operates in accordance with the terms and conditions of its agreement filed with the FERC. The amounts of outstanding loans to (borrowings from) the Utility Money Pool as of September 30, 2023 and December 31, 2022 are included in Advances to Affiliates and Advances from Affiliates, respectively, on the Registrant Subsidiaries’ balance sheets. The Utility Money Pool participants’ activity and corresponding authorized borrowing limits for the nine months ended September 30, 2023 are described in the following table:

	Maximum					Average				Net Loans to
	Borrowings			Maximum		Borrowings		Average		(Borrowings from)		Authorized
	from the			Loans to the		from the		Loans to the		the Utility Money		Short-term
	Utility			Utility		Utility		Utility		Pool as of		Borrowing
Company	Money Pool			Money Pool		Money Pool		Money Pool		September 30, 2023		Limit
	(in millions)
AEP Texas	$	477.5		$	42.0	$	250.4	$	42.0	$	42.0	$	500.0
AEPTCo	471.3			309.4		134.3		76.0		7.2		820.0		(a)
APCo	388.6			19.8		280.8		19.0		(183.2)		500.0
I&M	475.3			112.2		126.0		49.3		21.2		500.0
OPCo	485.7			64.7		207.1		40.2		(113.3)		500.0
PSO	375.0			121.5		106.3		53.9		9.2		400.0
SWEPCo	401.6		(b)	25.8		165.3		16.5		(48.9)		400.0

(a)    Amount represents the combined authorized short-term borrowing limit the State Transcos have from FERC or state regulatory commissions.

(b)    SWEPCo’s maximum borrowings from the Utility Money Pool exceeded the authorized short-term borrowing limit by $1.6 million on March 15, 2023. On March 16, 2023, SWEPCo’s borrowings from the Utility Money Pool were reduced below the $400 million authorized limit and borrowings have continued to remain below the authorized limit.

The activity in the above table does not include short-term lending activity of certain AEP nonutility subsidiaries. AEP Texas’ wholly-owned subsidiary, AEP Texas North Generation Company, LLC and SWEPCo’s wholly-owned subsidiary, Mutual Energy SWEPCo, LLC participate in the Nonutility Money Pool. The amounts of outstanding loans to the Nonutility Money Pool as of September 30, 2023 and December 31, 2022 are included in Advances to Affiliates on the subsidiaries’ balance sheets. The Nonutility Money Pool participants’ activity for the nine months ended September 30, 2023 is described in the following table:

		Maximum Loans		Average Loans		Loans to the Nonutility
		to the Nonutility		to the Nonutility		Money Pool as of
Company		Money Pool		Money Pool		September 30, 2023
	(in millions)
AEP Texas		$	7.0	$	6.9	$	7.0
SWEPCo		2.7		2.3		2.7

AEP has a direct financing relationship with AEPTCo to meet its short-term borrowing needs. The amounts of borrowings from AEP as of September 30, 2023 and December 31, 2022 are included in Advances from Affiliates on AEPTCo’s balance sheets. AEPTCo’s direct borrowing and lending activity with AEP and corresponding authorized borrowing limit for the nine months ended September 30, 2023 are described in the following table:

Maximum

Maximum

Average

Average

Borrowings from

Loans to

Authorized

Borrowings

Loans

Borrowings

Loans

AEP as of

AEP as of

Short-term

from AEP

to AEP

from AEP

to AEP

September 30, 2023

September 30, 2023

Borrowing Limit

(in millions)

$

37.9

$

158.1

$

3.0

$

67.5

$

33.4

$

—

$

50.0

(a)

(a)    Amount represents the combined authorized short-term borrowing limit the State Transcos have from FERC or state regulatory commissions.

The maximum and minimum interest rates for funds either borrowed from or loaned to the Utility Money Pool are summarized in the following table:

	Nine Months Ended September 30,
	2023		2022
Maximum Interest Rate	5.81	%	3.39	%
Minimum Interest Rate	4.66	%	0.10	%

The average interest rates for funds borrowed from and loaned to the Utility Money Pool are summarized for all Registrant Subsidiaries in the following table:

	Average Interest Rate for Funds				Average Interest Rate for Funds
	Borrowed from the Utility Money Pool				Loaned to the Utility Money Pool
	for Nine Months Ended September 30,				for Nine Months Ended September 30,
Company	2023		2022		2023		2022
AEP Texas	5.44	%	0.90	%	5.70	%	1.82	%
AEPTCo	5.29	%	1.03	%	5.52	%	2.14	%
APCo	5.47	%	1.39	%	5.47	%	2.13	%
I&M	5.13	%	1.38	%	5.54	%	1.46	%
OPCo	5.37	%	1.81	%	5.60	%	1.22	%
PSO	5.48	%	1.70	%	5.24	%	0.75	%
SWEPCo	5.25	%	1.67	%	5.72	%	0.55	%

Maximum, minimum and average interest rates for funds loaned to the Nonutility Money Pool are summarized in the following table:

Nine Months Ended September 30, 2023

Nine Months Ended September 30, 2022

Maximum

Minimum

Average

Maximum

Minimum

Average

Interest Rate

Interest Rate

Interest Rate

Interest Rate

Interest Rate

Interest Rate

for Funds

for Funds

for Funds

for Funds

for Funds

for Funds

Loaned to

Loaned to

Loaned to

Loaned to

Loaned to

Loaned to

the Nonutility

the Nonutility

the Nonutility

the Nonutility

the Nonutility

the Nonutility

Company

Money Pool

Money Pool

Money Pool

Money Pool

Money Pool

Money Pool

AEP Texas

5.81

%

4.66

%

5.47

%

3.39

%

0.46

%

1.51

%

SWEPCo

5.81

%

4.66

%

5.49

%

3.39

%

0.46

%

1.52

%

AEPTCo’s maximum, minimum and average interest rates for funds either borrowed from or loaned to AEP are summarized in the following table:

	Maximum		Minimum		Maximum		Minimum		Average		Average
	Interest Rate		Interest Rate		Interest Rate		Interest Rate		Interest Rate		Interest Rate
Nine Months	for Funds		for Funds		for Funds		for Funds		for Funds		for Funds
Ended	Borrowed		Borrowed		Loaned		Loaned		Borrowed		Loaned
September 30,	from AEP		from AEP		to AEP		to AEP		from AEP		to AEP
2023	5.81	%	4.53	%	5.81	%	4.53	%	5.43	%	5.46	%
2022	3.39	%	0.46	%	3.37	%	0.46	%	1.56	%	1.38	%

Short-term Debt (Applies to AEP and SWEPCo)

Outstanding short-term debt was as follows:

		September 30, 2023				December 31, 2022
		Outstanding		Interest		Outstanding		Interest
Company	Type of Debt	Amount		Rate (a)		Amount		Rate (a)
		(dollars in millions)
AEP	Securitized Debt for Receivables (b)	$	900.0	5.60	%	$	750.0	4.67	%
AEP	Commercial Paper	1,826.5		5.64	%	2,862.2		4.80	%
AEP	Term Loan	—		—	%	150.0		5.17	%
AEP	Term Loan	—		—	%	125.0		5.17	%
AEP	Term Loan	—		—	%	100.0		5.23	%
AEP	Term Loan	—		—	%	125.0		4.87	%
SWEPCo	Notes Payable	3.9		7.67	%	—		—	%
	Total Short-term Debt	$	2,730.4			$	4,112.2

(a)Weighted-average rate as of September 30, 2023 and December 31, 2022, respectively.

(b)Amount of securitized debt for receivables as accounted for under the “Transfers and Servicing” accounting guidance.

Credit Facilities

For a discussion of credit facilities, see “Letters of Credit” section of Note 5.

Securitized Accounts Receivables – AEP Credit (Applies to AEP)

AEP Credit has a receivables securitization agreement with bank conduits. Under the securitization agreement, AEP Credit receives financing from the bank conduits for the interest in the receivables AEP Credit acquires from affiliated utility subsidiaries. These securitized transactions allow AEP Credit to repay its outstanding debt obligations, continue to purchase the operating companies’ receivables and accelerate AEP Credit’s cash collections.

AEP Credit’s receivables securitization agreement provides a commitment of $900 million from bank conduits to purchase receivables. The agreement was amended in August 2023 to increase the commitment from $750 million and expires in September 2025. As of September 30, 2023, the affiliated utility subsidiaries were in compliance with all requirements under the agreement.

Accounts receivable information for AEP Credit was as follows:

	Three Months Ended September 30,						Nine Months Ended September 30,
	2023			2022			2023			2022
	(dollars in millions)
Effective Interest Rates on Securitization of Accounts Receivable	5.55		%	2.25		%	5.23		%	1.16		%
Net Uncollectible Accounts Receivable Written-Off	$	8.8		$	9.5		$	22.9		$	23.1

	September 30, 2023		December 31, 2022
	(in millions)
Accounts Receivable Retained Interest and Pledged as Collateral Less Uncollectible Accounts	$	1,257.0	$	1,167.7
Short-term – Securitized Debt of Receivables	900.0		750.0
Delinquent Securitized Accounts Receivable	59.5		44.2
Bad Debt Reserves Related to Securitization	42.2		39.7
Unbilled Receivables Related to Securitization	301.8		360.9

AEP Credit’s delinquent customer accounts receivable represent accounts greater than 30 days past due.

Securitized Accounts Receivables – AEP Credit (Applies to all Registrant Subsidiaries except AEP Texas and AEPTCo)

Under this sale of receivables arrangement, the Registrant Subsidiaries sell, without recourse, certain of their customer accounts receivable and accrued unbilled revenue balances to AEP Credit and are charged a fee based on AEP Credit’s financing costs, administrative costs and uncollectible accounts experience for each Registrant Subsidiary’s receivables. APCo does not have regulatory authority to sell its West Virginia accounts receivable. KPCo ceased selling accounts receivable to AEP Credit in the first quarter of 2022, based on the expected sale to Liberty. As a result, in the first quarter of 2022, KPCo recorded an allowance for uncollectible accounts on its balance sheet for those receivables no longer sold to AEP Credit. In the third quarter of 2023, KPCo resumed selling accounts receivable to AEP Credit, due to the termination of the sale to Liberty, and the balance in KPCo’s allowance for uncollectible accounts was transferred to AEP Credit. The costs of customer accounts receivable sold are reported in Other Operation expense on the Registrant Subsidiaries’ statements of income. The Registrant Subsidiaries manage and service their customer accounts receivable, which are sold to AEP Credit. AEP Credit securitizes the eligible receivables for the operating companies and retains the remainder.

The amount of accounts receivable and accrued unbilled revenues under the sale of receivables agreements were:

Company	September 30, 2023		December 31, 2022
	(in millions)
APCo	$	170.5	$	194.4
I&M	176.2		166.9
OPCo	479.3		478.6
PSO	211.5		155.5
SWEPCo	210.2		194.0

The fees paid to AEP Credit for customer accounts receivable sold were:

	Three Months Ended September 30,				Nine Months Ended September 30,
Company	2023		2022		2023		2022
	(in millions)
APCo	$	4.1	$	2.8	$	13.3	$	5.6
I&M	4.4		2.8		12.2		6.5
OPCo	7.4		7.3		22.3		22.2
PSO	4.6		2.4		11.3		4.6
SWEPCo	5.2		3.2		13.9		6.0

The proceeds on the sale of receivables to AEP Credit were:

	Three Months Ended September 30,				Nine Months Ended September 30,
Company	2023		2022		2023		2022
	(in millions)
APCo	$	451.6	$	360.4	$	1,372.7	$	1,114.9
I&M	553.3		558.5		1,575.9		1,574.3
OPCo	850.3		874.1		2,518.6		2,284.0
PSO	633.8		588.5		1,510.3		1,380.4
SWEPCo	558.4		593.6		1,456.5		1,425.3

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Variable Interest Entities

9 Months Ended

Sep. 30, 2023

Variable Interest Entities

VARIABLE INTEREST ENTITIES

The disclosures in this note apply to AEP unless indicated otherwise.

The accounting guidance for “Variable Interest Entities” is a consolidation model that considers if a company has a variable interest in a VIE.  A VIE is a legal entity that possesses any of the following conditions: the entity’s equity at risk is not sufficient to permit the legal entity to finance its activities without additional subordinated financial support, equity owners are unable to direct the activities that most significantly impact the legal entity’s economic performance (or they possess disproportionate voting rights in relation to the economic interest in the legal entity), or the equity owners lack the obligation to absorb the legal entity’s expected losses or the right to receive the legal entity’s expected residual returns. Entities are required to consolidate a VIE when it is determined that they have a controlling financial interest in a VIE and therefore, are the primary beneficiary of that VIE, as defined by the accounting guidance for “Variable Interest Entities.” In determining whether AEP is the primary beneficiary of a VIE, management considers whether AEP has the power to direct the most significant activities of the VIE and is obligated to absorb losses or receive the expected residual returns that are significant to the VIE.

AEP holds ownership interests in businesses with varying ownership structures. AEP has not provided material financial or other support that was not previously contractually required to any of its consolidated VIEs. If an entity is determined not to be a VIE, or if the entity is determined to be a VIE and AEP is not deemed to be the primary beneficiary, the entity is accounted for under the equity method of accounting.

Consolidated Variable Interests Entities

The Annual Report on Form 10-K for the year ended December 31, 2022 includes a detailed discussion of the Registrants’ consolidated VIEs.

The balances below represent the assets and liabilities of consolidated VIEs. These balances include intercompany transactions that are eliminated upon consolidation.

American Electric Power Company, Inc. and Subsidiary Companies
Variable Interest Entities
September 30, 2023
	Registrant Subsidiaries
	SWEPCo Sabine		I&M DCC Fuel		AEP Texas Transition Funding			AEP Texas Restoration Funding			APCo Appalachian Consumer Rate Relief Funding
	(in millions)
ASSETS
Current Assets	$	4.8	$	59.9	$	49.4		$	20.9		$	4.7
Net Property, Plant and Equipment	—		104.1		—			—			—
Other Noncurrent Assets	128.1		51.8		90.5		(a)	151.4		(b)	145.3		(c)
Total Assets	$	132.9	$	215.8	$	139.9		$	172.3		$	150.0
LIABILITIES AND EQUITY
Current Liabilities	$	21.0	$	59.8	$	75.3		$	36.0		$	28.5
Noncurrent Liabilities	110.6		156.0		60.3			135.1			119.6
Equity	1.3		—		4.3			1.2			1.9
Total Liabilities and Equity	$	132.9	$	215.8	$	139.9		$	172.3		$	150.0

(a)Includes an intercompany item eliminated in consolidation of $10 million.

(b)Includes an intercompany item eliminated in consolidation of $6 million.

(c)Includes an intercompany item eliminated in consolidation of $2 million.

American Electric Power Company, Inc. and Subsidiary Companies
Variable Interest Entities
September 30, 2023
	Other Consolidated VIEs
	AEP Credit		Protected Cell of EIS		Transource Energy
	(in millions)
ASSETS
Current Assets	$	1,259.0	$	202.9	$	32.8
Net Property, Plant and Equipment	—		—		499.8
Other Noncurrent Assets	9.6		0.7		4.0
Total Assets	$	1,268.6	$	203.6	$	536.6
LIABILITIES AND EQUITY
Current Liabilities	$	1,201.3	$	54.1	$	21.3
Noncurrent Liabilities	0.9		84.7		229.4
Equity	66.4		64.8		285.9
Total Liabilities and Equity	$	1,268.6	$	203.6	$	536.6

As of September 30, 2023, Apple Blossom, Black Oak, Santa Rita East and Dry Lake are no longer consolidated VIEs due to the sale of the Competitive Contracted Renewables Portfolio. See the “Disposition of the Competitive Contracted Renewables Portfolio” section of Note 6 for additional information.

American Electric Power Company, Inc. and Subsidiary Companies
Variable Interest Entities
December 31, 2022
	Registrant Subsidiaries
	SWEPCo Sabine		I&M DCC Fuel		AEP Texas Transition Funding			AEP Texas Restoration Funding			APCo Appalachian Consumer Rate Relief Funding
	(in millions)
ASSETS
Current Assets	$	108.3	$	90.2	$	27.0		$	21.1		$	13.5
Net Property, Plant and Equipment	7.2		179.1		—			—			—
Other Noncurrent Assets	130.0		94.0		140.9		(a)	168.8		(b)	164.6		(c)
Total Assets	$	245.5	$	363.3	$	167.9		$	189.9		$	178.1
LIABILITIES AND EQUITY
Current Liabilities	$	25.4	$	90.0	$	73.2		$	31.3		$	29.3
Noncurrent Liabilities	219.4		273.3		90.4			157.4			146.9
Equity	0.7		—		4.3			1.2			1.9
Total Liabilities and Equity	$	245.5	$	363.3	$	167.9		$	189.9		$	178.1

(a)Includes an intercompany item eliminated in consolidation of $16 million.

(b)Includes an intercompany item eliminated in consolidation of $7 million.

(c)Includes an intercompany item eliminated in consolidation of $2 million.

American Electric Power Company, Inc. and Subsidiary Companies
Variable Interest Entities
December 31, 2022
	Other Consolidated VIEs
	AEP Credit		Protected Cell of EIS		Transource Energy		Apple Blossom and Black Oak		Santa Rita East		Dry Lake
	(in millions)
ASSETS
Current Assets	$	1,181.0	$	194.5	$	23.5	$	8.3	$	21.3	$	4.0
Net Property, Plant and Equipment	—		—		482.3		216.5		421.6		142.6
Other Noncurrent Assets	9.0		0.3		2.7		13.6		0.1		0.3
Total Assets	$	1,190.0	$	194.8	$	508.5	$	238.4	$	443.0	$	146.9
LIABILITIES AND EQUITY
Current Liabilities	$	1,087.8	$	46.4	$	22.8	$	4.5	$	9.6	$	1.0
Noncurrent Liabilities	0.9		79.1		218.6		5.4		7.3		0.7
Equity	101.3		69.3		267.1		228.5		426.1		145.2
Total Liabilities and Equity	$	1,190.0	$	194.8	$	508.5	$	238.4	$	443.0	$	146.9

Significant Variable Interests in Non-Consolidated VIEs and Significant Equity Method Investments

The Annual Report on Form 10-K for the year ended December 31, 2022 includes a detailed discussion of significant variable interests in non-consolidated VIEs and other significant equity method investments. As of September 30, 2023, AEP no longer owns a significant equity method investment in four joint ventures through AEP Wind Holdings, LLC due to the sale of the Competitive Contracted Renewables Portfolio. See the “Disposition of the Competitive Contracted Renewables Portfolio” section of Note 6 for additional information.

XML

Property, Plant and Equipment

9 Months Ended

Sep. 30, 2023

Property, Plant and Equipment

PROPERTY, PLANT AND EQUIPMENT

The disclosure in this note applies to AEP and SWEPCo.

Asset Retirement Obligations

The Registrants record ARO in accordance with the accounting guidance for “Asset Retirement and Environmental Obligations” for legal obligations for asbestos removal and for the retirement of certain ash disposal facilities, wind farms, solar farms and certain coal mining facilities. The table below summarizes significant changes to the Registrants ARO recorded in 2023 and should be read in conjunction with the Property, Plant and Equipment note within the 2022 Annual Report.

The following is a reconciliation of the aggregate carrying amounts of ARO for AEP and SWEPCo:

Company	ARO as of December 31, 2022		Accretion Expense		Liabilities Incurred		Liabilities Settled		Revisions in Cash Flow Estimates		ARO as of September 30, 2023
	(in millions)
AEP (a)(b)(c)(d)(e)(f)	$	2,944.9	$	86.0	$	12.9	$	(98.1)	$	13.8	$	2,959.5
SWEPCo (a)(c)(d)(e)	282.2		10.0		7.1		(37.9)		0.4		261.8

(a)Includes ARO related to ash disposal facilities.

(b)Includes ARO related to nuclear decommissioning costs for the Cook Plant of $2.05 billion and $2 billion as of September 30, 2023 and December 31, 2022, respectively.

(c)Includes ARO related to Sabine and DHLC.

(d)Includes ARO related to asbestos removal.

(e)In 2023, SWEPCo settled $35 million of costs related to closure/reclamation work performed due to the recent retirements of the Pirkey Plant and Dolet Hills Power Station. See “Coal-Fired Generation Plants” section of Note 4 for additional information.

(f)In August 2023, AEP completed the sale of its competitive contracted renewables portfolio to a nonaffiliated party and settled ARO liabilities of $31 million. See “Disposition of the Competitive Contracted Renewables Portfolio” section of Note 6 for additional information.

XML

Revenue from Contracts with Customers

9 Months Ended

Sep. 30, 2023

Revenue from Contract with Customer

REVENUE FROM CONTRACTS WITH CUSTOMERS

The disclosures in this note apply to all Registrants, unless indicated otherwise.

Disaggregated Revenues from Contracts with Customers

The tables below represent AEP’s reportable segment revenues from contracts with customers, net of respective provisions for refund, by type of revenue:

	Three Months Ended September 30, 2023
	Vertically Integrated Utilities		Transmission and Distribution Utilities		AEP Transmission Holdco		Generation & Marketing		Corporate and Other		Reconciling Adjustments		AEP Consolidated
	(in millions)
Retail Revenues:
Residential Revenues	$	1,326.7	$	772.5	$	—	$	—	$	—	$	—	$	2,099.2
Commercial Revenues	753.3		387.7		—		—		—		—		1,141.0
Industrial Revenues	699.9		138.9		—		—		—		(0.3)		838.5
Other Retail Revenues	66.6		13.0		—		—		—		—		79.6
Total Retail Revenues	2,846.5		1,312.1		—		—		—		(0.3)		4,158.3
Wholesale and Competitive Retail Revenues:
Generation Revenues	174.3		—		—		31.8		—		(0.3)		205.8
Transmission Revenues (a)	120.6		176.0		466.1		—		—		(425.1)		337.6
Renewable Generation Revenues (b)	—		—		—		19.8		—		(2.5)		17.3
Retail, Trading and Marketing Revenues (c)	—		—		—		510.8		0.8		(36.7)		474.9
Total Wholesale and Competitive Retail Revenues	294.9		176.0		466.1		562.4		0.8		(464.6)		1,035.6
Other Revenues from Contracts with Customers (d)	61.3		58.2		4.8		0.9		55.6		(48.5)		132.3
Total Revenues from Contracts with Customers	3,202.7		1,546.3		470.9		563.3		56.4		(513.4)		5,326.2
Other Revenues:
Alternative Revenue Programs (b) (e)	0.5		(5.0)		5.8		—		—		5.7		7.0
Other Revenues (b) (f)	2.2		2.8		—		3.4		0.8		(0.7)		8.5
Total Other Revenues	2.7		(2.2)		5.8		3.4		0.8		5.0		15.5
Total Revenues	$	3,205.4	$	1,544.1	$	476.7	$	566.7	$	57.2	$	(508.4)	$	5,341.7

(a)Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for AEP Transmission Holdco was $366 million. The remaining affiliated amounts were immaterial.

(b)Amounts include affiliated and nonaffiliated revenues.

(c)Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for Generation & Marketing was $37 million. The remaining affiliated amounts were immaterial.

(d)Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for Corporate and Other was $32 million. The remaining affiliated amounts were immaterial.

(e)Alternative revenue programs in certain jurisdictions include regulatory mechanisms that periodically adjust for over/under collection of related revenues.

(f)Generation & Marketing includes economic hedge activity.

	Three Months Ended September 30, 2022
	Vertically Integrated Utilities		Transmission and Distribution Utilities		AEP Transmission Holdco		Generation & Marketing		Corporate and Other		Reconciling Adjustments		AEP Consolidated
	(in millions)
Retail Revenues:
Residential Revenues	$	1,298.0	$	721.9	$	—	$	—	$	—	$	—	$	2,019.9
Commercial Revenues	725.1		373.0		—		—		—		—		1,098.1
Industrial Revenues	658.5		191.5		—		—		—		(0.3)		849.7
Other Retail Revenues	54.3		15.0		—		—		—		—		69.3
Total Retail Revenues	2,735.9		1,301.4		—		—		—		(0.3)		4,037.0
Wholesale and Competitive Retail Revenues:
Generation Revenues	299.3		—		—		83.7		—		(0.2)		382.8
Transmission Revenues (a)	120.3		162.3		424.9		—		—		(392.7)		314.8
Renewable Generation Revenues (b)	—		—		—		44.3		—		(2.5)		41.8
Retail, Trading and Marketing Revenues	—		—		—		482.9		2.2		0.2		485.3
Total Wholesale and Competitive Retail Revenues	419.6		162.3		424.9		610.9		2.2		(395.2)		1,224.7
Other Revenues from Contracts with Customers (c)	69.7		74.5		(0.3)		1.7		24.3		(31.9)		138.0
Total Revenues from Contracts with Customers	3,225.2		1,538.2		424.6		612.6		26.5		(427.4)		5,399.7
Other Revenues:
Alternative Revenue Programs (b) (d)	0.9		(13.5)		6.3		—		—		4.4		(1.9)
Other Revenues (b) (e)	0.2		5.5		—		122.8		1.8		(2.0)		128.3
Total Other Revenues	1.1		(8.0)		6.3		122.8		1.8		2.4		126.4
Total Revenues	$	3,226.3	$	1,530.2	$	430.9	$	735.4	$	28.3	$	(425.0)	$	5,526.1

(a)Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for AEP Transmission Holdco was $342 million. The remaining affiliated amounts were immaterial.

(b)Amounts include affiliated and nonaffiliated revenues.

(c)Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for Corporate and Other was $18 million. The remaining affiliated amounts were immaterial.

(d)Alternative revenue programs in certain jurisdictions include regulatory mechanisms that periodically adjust for over/under collection of related revenues.

(e)Generation & Marketing includes economic hedge activity.

	Three Months Ended September 30, 2023
	AEP Texas		AEPTCo		APCo		I&M		OPCo		PSO		SWEPCo
	(in millions)
Retail Revenues:
Residential Revenues	$	236.2	$	—	$	397.1	$	230.7	$	536.3	$	310.5	$	286.5
Commercial Revenues	112.4		—		181.3		159.2		275.3		171.9		174.9
Industrial Revenues	35.4		—		197.1		159.1		103.6		114.1		105.5
Other Retail Revenues	9.2		—		26.8		1.3		3.8		33.8		2.4
Total Retail Revenues	393.2		—		802.3		550.3		919.0		630.3		569.3
Wholesale Revenues:
Generation Revenues (a)	—		—		79.4		90.2		—		(4.9)		36.8
Transmission Revenues (b)	154.6		454.7		45.5		10.4		21.4		10.8		42.4
Total Wholesale Revenues	154.6		454.7		124.9		100.6		21.4		5.9		79.2
Other Revenues from Contracts with Customers (c)	8.8		5.0		35.2		26.2		49.2		5.4		6.0
Total Revenues from Contracts with Customers	556.6		459.7		962.4		677.1		989.6		641.6		654.5
Other Revenues:
Alternative Revenue Programs (d) (e)	(2.0)		3.0		(0.7)		(2.9)		(3.1)		2.6		0.3
Other Revenues (e)	—		—		0.1		2.1		3.0		—		—
Total Other Revenues	(2.0)		3.0		(0.6)		(0.8)		(0.1)		2.6		0.3
Total Revenues	$	554.6	$	462.7	$	961.8	$	676.3	$	989.5	$	644.2	$	654.8

(a)Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for APCo was $36 million primarily related to the PPA with KGPCo.

(b)Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for AEPTCo was $363 million, APCo was $22 million and SWEPCo was $17 million. The remaining affiliated amounts were immaterial.

(c)Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for I&M was $18 million primarily related to barging, urea transloading and other transportation services. The remaining affiliated amounts were immaterial.

(d)Alternative revenue programs in certain jurisdictions include regulatory mechanisms that periodically adjust for over/under collection of related revenues.

(e)Amounts include affiliated and nonaffiliated revenues.

	Three Months Ended September 30, 2022
	AEP Texas		AEPTCo		APCo		I&M		OPCo		PSO		SWEPCo
	(in millions)
Retail Revenues:
Residential Revenues	$	204.0	$	—	$	360.5	$	238.6	$	517.9	$	299.6	$	285.5
Commercial Revenues	107.1		—		161.1		154.3		266.1		153.4		182.3
Industrial Revenues	35.4		—		163.3		155.6		156.1		98.9		108.3
Other Retail Revenues	11.5		—		20.6		1.2		3.5		30.1		0.6
Total Retail Revenues	358.0		—		705.5		549.7		943.6		582.0		576.7
Wholesale Revenues:
Generation Revenues (a)	—		—		107.9		126.3		—		9.4		87.6
Transmission Revenues (b)	140.8		411.7		41.5		8.8		21.5		10.2		42.3
Total Wholesale Revenues	140.8		411.7		149.4		135.1		21.5		19.6		129.9
Other Revenues from Contracts with Customers (c)	9.5		(0.3)		33.7		30.6		64.8		6.4		7.6
Total Revenues from Contracts with Customers	508.3		411.4		888.6		715.4		1,029.9		608.0		714.2
Other Revenues:
Alternative Revenue Programs (d) (e)	0.6		7.1		—		—		(14.1)		0.2		3.3
Other Revenues (e)	—		—		0.3		—		5.5		—		—
Total Other Revenues	0.6		7.1		0.3		—		(8.6)		0.2		3.3
Total Revenues	$	508.9	$	418.5	$	888.9	$	715.4	$	1,021.3	$	608.2	$	717.5

(a)Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for APCo was $44 million primarily related to the PPA with KGPCo.

(b)Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for AEPTCo was $339 million. The remaining affiliated amounts were immaterial.

(c)Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for I&M was $15 million primarily related to barging, urea transloading and other transportation services. The remaining affiliated amounts were immaterial.

(d)Alternative revenue programs in certain jurisdictions include regulatory mechanisms that periodically adjust for over/under collection of related revenues.

(e)Amounts include affiliated and nonaffiliated revenues.

	Nine Months Ended September 30, 2023
	Vertically Integrated Utilities		Transmission and Distribution Utilities		AEP Transmission Holdco		Generation & Marketing		Corporate and Other		Reconciling Adjustments		AEP Consolidated
	(in millions)
Retail Revenues:
Residential Revenues	$	3,459.1	$	2,003.4	$	—	$	—	$	—	$	—	$	5,462.5
Commercial Revenues	2,029.4		1,121.9		—		—		—		—		3,151.3
Industrial Revenues (a)	2,069.1		503.9		—		—		—		(0.6)		2,572.4
Other Retail Revenues	182.3		37.4		—		—		—		—		219.7
Total Retail Revenues	7,739.9		3,666.6		—		—		—		(0.6)		11,405.9
Wholesale and Competitive Retail Revenues:
Generation Revenues	498.5		—		—		83.8		—		(0.2)		582.1
Transmission Revenues (b)	348.8		524.3		1,372.0		—		—		(1,229.7)		1,015.4
Renewable Generation Revenues (a)	—		—		—		74.2		—		(5.7)		68.5
Retail, Trading and Marketing Revenues (c)	—		—		—		1,332.2		1.7		(46.7)		1,287.2
Total Wholesale and Competitive Retail Revenues	847.3		524.3		1,372.0		1,490.2		1.7		(1,282.3)		2,953.2
Other Revenues from Contracts with Customers (d)	155.8		157.1		12.7		7.7		113.6		(132.1)		314.8
Total Revenues from Contracts with Customers	8,743.0		4,348.0		1,384.7		1,497.9		115.3		(1,415.0)		14,673.9
Other Revenues:
Alternative Revenue Programs (a) (e)	(7.5)		(19.5)		6.1		—		—		2.3		(18.6)
Other Revenues (a) (f)	2.2		20.0		—		(272.8)		4.0		(3.6)		(250.2)
Total Other Revenues	(5.3)		0.5		6.1		(272.8)		4.0		(1.3)		(268.8)
Total Revenues	$	8,737.7	$	4,348.5	$	1,390.8	$	1,225.1	$	119.3	$	(1,416.3)	$	14,405.1

(a)Amounts include affiliated and nonaffiliated revenues.

(b)Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for AEP Transmission Holdco was $1.1 billion. The affiliated revenue for Vertically Integrated Utilities was $125 million. The remaining affiliated amounts were immaterial.

(c)Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for Generation & Marketing was $47 million. The remaining affiliated amounts were immaterial.

(d)Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for Corporate and Other was $87 million. The remaining affiliated amounts were immaterial.

(e)Alternative revenue programs in certain jurisdictions include regulatory mechanisms that periodically adjust for over/under collection of related revenues.

(f)Generation & Marketing includes economic hedge activity.

	Nine Months Ended September 30, 2022
	Vertically Integrated Utilities		Transmission and Distribution Utilities		AEP Transmission Holdco		Generation & Marketing		Corporate and Other		Reconciling Adjustments		AEP Consolidated
	(in millions)
Retail Revenues:
Residential Revenues	$	3,428.1	$	1,884.1	$	—	$	—	$	—	$	—	$	5,312.2
Commercial Revenues	1,922.8		994.4		—		—		—		—		2,917.2
Industrial Revenues (a)	1,863.3		487.3		—		—		—		(0.7)		2,349.9
Other Retail Revenues	154.6		39.4		—		—		—		—		194.0
Total Retail Revenues	7,368.8		3,405.2		—		—		—		(0.7)		10,773.3
Wholesale and Competitive Retail Revenues:
Generation Revenues (a)	674.8		—		—		207.0		—		(0.1)		881.7
Transmission Revenues (b)	334.4		482.1		1,261.0		—		—		(1,086.5)		991.0
Renewable Generation Revenues (a)	—		—		—		104.9		—		(6.2)		98.7
Retail, Trading and Marketing Revenues (c)	—		—		—		1,280.0		6.7		(11.1)		1,275.6
Total Wholesale and Competitive Retail Revenues	1,009.2		482.1		1,261.0		1,591.9		6.7		(1,103.9)		3,247.0
Other Revenues from Contracts with Customers (d)	180.5		194.2		(0.3)		11.9		59.1		(71.6)		373.8
Total Revenues from Contracts with Customers	8,558.5		4,081.5		1,260.7		1,603.8		65.8		(1,176.2)		14,394.1
Other Revenues:
Alternative Revenue Programs (a) (e)	3.4		(21.5)		(39.6)		—		—		(7.4)		(65.1)
Other Revenues (a) (f)	0.3		18.6		—		410.5		6.9		(6.9)		429.4
Total Other Revenues	3.7		(2.9)		(39.6)		410.5		6.9		(14.3)		364.3
Total Revenues	$	8,562.2	$	4,078.6	$	1,221.1	$	2,014.3	$	72.7	$	(1,190.5)	$	14,758.4

(a)Amounts include affiliated and nonaffiliated revenues.

(b)Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for AEP Transmission Holdco was $1 billion. The affiliated revenue for Vertically Integrated Utilities was $120 million. The remaining affiliated amounts were immaterial.

(c)Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for Generation & Marketing was $11 million. The remaining affiliated amounts were immaterial.

(d)Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for Corporate and Other was $36 million. The remaining affiliated amounts were immaterial.

(e)Alternative revenue programs in certain jurisdictions include regulatory mechanisms that periodically adjust for over/under collection of related revenues.

(f)Generation & Marketing includes economic hedge activity.

	Nine Months Ended September 30, 2023
	AEP Texas		AEPTCo		APCo		I&M		OPCo		PSO		SWEPCo
	(in millions)
Retail Revenues:
Residential Revenues	$	511.8	$	—	$	1,192.4	$	655.5	$	1,491.6	$	667.9	$	647.5
Commercial Revenues	310.3		—		516.2		439.5		811.6		412.7		472.2
Industrial Revenues (a)	109.9		—		575.4		467.6		394.0		320.2		320.3
Other Retail Revenues	26.2		—		78.2		3.8		11.2		86.3		7.6
Total Retail Revenues	958.2		—		2,362.2		1,566.4		2,708.4		1,487.1		1,447.6
Wholesale Revenues:
Generation Revenues (b)	—		—		223.8		257.7		—		0.3		120.3
Transmission Revenues (c)	464.0		1,338.1		130.8		28.1		60.3		32.0		123.6
Total Wholesale Revenues	464.0		1,338.1		354.6		285.8		60.3		32.3		243.9
Other Revenues from Contracts with Customers (d)	29.2		12.8		60.0		92.6		127.9		14.9		20.9
Total Revenues from Contracts with Customers	1,451.4		1,350.9		2,776.8		1,944.8		2,896.6		1,534.3		1,712.4
Other Revenues:
Alternative Revenue Program (a) (e)	(6.1)		(1.7)		(0.9)		(8.4)		(13.5)		1.6		(3.9)
Other Revenues (a)	—		—		0.1		2.1		20.1		—		—
Total Other Revenues	(6.1)		(1.7)		(0.8)		(6.3)		6.6		1.6		(3.9)
Total Revenues	$	1,445.3	$	1,349.2	$	2,776.0	$	1,938.5	$	2,903.2	$	1,535.9	$	1,708.5

(a)Amounts include affiliated and nonaffiliated revenues.

(b)Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for APCo was $121 million primarily relating to the PPA with KGPCo. The remaining affiliated amounts were immaterial.

(c)Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for AEPTCo was $1.1 billion, APCo was $64 million and SWEPCo was $43 million. The remaining affiliated amounts were immaterial.

(d)Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for I&M was $52 million primarily relating to barging, urea transloading and other transportation services. The remaining affiliated amounts were immaterial.

(e)Alternative revenue programs in certain jurisdictions include regulatory mechanisms that periodically adjust for over/under collection of related revenues.

	Nine Months Ended September 30, 2022
	AEP Texas		AEPTCo		APCo		I&M		OPCo		PSO		SWEPCo
	(in millions)
Retail Revenues:
Residential Revenues	$	520.8	$	—	$	1,131.7	$	665.6	$	1,363.3	$	650.7	$	650.0
Commercial Revenues	312.6		—		467.6		419.5		681.9		372.1		458.8
Industrial Revenues (a)	102.6		—		479.0		452.1		384.8		270.0		290.1
Other Retail Revenues	29.2		—		61.4		3.7		10.2		77.1		7.4
Total Retail Revenues	965.2		—		2,139.7		1,540.9		2,440.2		1,369.9		1,406.3
Wholesale Revenues:
Generation Revenues (b)	—		—		227.6		310.9		—		19.2		206.2
Transmission Revenues (c)	417.7		1,218.1		123.4		26.3		64.4		28.9		116.8
Total Wholesale Revenues	417.7		1,218.1		351.0		337.2		64.4		48.1		323.0
Other Revenues from Contracts with Customers (d)	24.4		(0.4)		78.6		86.3		169.6		21.4		18.9
Total Revenues from Contracts with Customers	1,407.3		1,217.7		2,569.3		1,964.4		2,674.2		1,439.4		1,748.2
Other Revenues:
Alternative Revenue Program (a) (e)	(2.9)		(34.4)		0.1		7.3		(18.6)		(0.7)		0.7
Other Revenues (a)	—		—		0.4		(0.1)		18.6		—		—
Total Other Revenues	(2.9)		(34.4)		0.5		7.2		—		(0.7)		0.7
Total Revenues	$	1,404.4	$	1,183.3	$	2,569.8	$	1,971.6	$	2,674.2	$	1,438.7	$	1,748.9

(a)Amounts include affiliated and nonaffiliated revenues.

(b)Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for APCo was $122 million primarily relating to the PPA with KGPCo.

(c)Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for AEPTCo was $992 million. The remaining affiliated amounts were immaterial.

(d)Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for I&M was $44 million primarily relating to barging, urea transloading and other transportation services. The remaining affiliated amounts were immaterial.

(e)Alternative revenue programs in certain jurisdictions include regulatory mechanisms that periodically adjust for over/under collection of related revenues.

Fixed Performance Obligations (Applies to AEP, APCo and I&M)

The following table represents the Registrants’ remaining fixed performance obligations satisfied over time as of September 30, 2023. Fixed performance obligations primarily include electricity sales for fixed amounts of energy and stand ready services into PJM’s RPM market. The Registrants elected to apply the exemption to not disclose the value of unsatisfied performance obligations for contracts with an original expected term of one year or less. Due to the annual establishment of revenue requirements, transmission revenues are excluded from the table below. The Registrant Subsidiaries amounts shown in the table below include affiliated and nonaffiliated revenues.

Company	2023		2024-2025		2026-2027		After 2027		Total
	(in millions)
AEP	$	22.6	$	166.2	$	141.2	$	35.0	$	365.0
APCo	4.0		32.2		26.6		11.6		74.4
I&M	1.1		8.8		8.8		4.5		23.2

Contract Assets and Liabilities

Contract assets are recognized when the Registrants have a right to consideration that is conditional upon the occurrence of an event other than the passage of time, such as future performance under a contract. The Registrants did not have material contract assets as of September 30, 2023 and December 31, 2022.

When the Registrants receive consideration, or such consideration is unconditionally due from a customer prior to transferring goods or services to the customer under the terms of a sales contract, they recognize a contract liability on the balance sheets in the amount of that consideration. Revenue for such consideration is subsequently recognized in the period or periods in which the remaining performance obligations in the contract are satisfied. The Registrants’ contract liabilities typically arise from services provided under joint use agreements for utility poles. The Registrants did not have material contract liabilities as of September 30, 2023 and December 31, 2022.

Accounts Receivable from Contracts with Customers

Accounts receivable from contracts with customers are presented on the Registrant Subsidiaries’ balance sheets within the Accounts Receivable - Customers line item. The Registrant Subsidiaries’ balances for receivables from contracts that are not recognized in accordance with the accounting guidance for “Revenue from Contracts with Customers” included in Accounts Receivable - Customers were not material as of September 30, 2023 and December 31, 2022. See “Securitized Accounts Receivable - AEP Credit” section of Note 12 for additional information.

The following table represents the amount of affiliated accounts receivable from contracts with customers included in Accounts Receivable - Affiliated Companies on the Registrant Subsidiaries’ balance sheets:

Company	September 30, 2023		December 31, 2022
	(in millions)
AEP Texas	$	0.1	$	0.1
AEPTCo	122.5		113.8
APCo	69.3		64.5
I&M	50.1		75.3
OPCo	67.3		49.9
PSO	13.8		18.8
SWEPCo	23.7		19.1

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Pay vs Performance Disclosure - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Pay vs Performance Disclosure
Net Income (Loss)	$ 516.1	$ 520.8	$ 916.5	$ 1,238.9

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Insider Trading Arrangements	3 Months Ended
	Sep. 30, 2023
Trading Arrangements, by Individual
Rule 10b5-1 Arrangement Adopted	false
Non-Rule 10b5-1 Arrangement Adopted	false
Rule 10b5-1 Arrangement Terminated	false
Non-Rule 10b5-1 Arrangement Terminated	false

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Significant Accounting Matters (Policies)

9 Months Ended

Sep. 30, 2023

Basis of Accounting

General

The unaudited condensed financial statements and footnotes were prepared in accordance with GAAP for interim financial information and with the instructions to Form 10-Q and Article 10 of Regulation S-X of the SEC.  Accordingly, they do not include all of the information and footnotes required by GAAP for complete annual financial statements.

In the opinion of management, the unaudited condensed interim financial statements reflect all normal and recurring accruals and adjustments necessary for a fair statement of the net income, financial position and cash flows for the interim periods for each Registrant.  Net income for the three and nine months ended September 30, 2023 is not necessarily indicative of results that may be expected for the year ending December 31, 2023.  The condensed financial statements are unaudited and should be read in conjunction with the audited 2022 financial statements and notes thereto, which are included in the Registrants’ Annual Reports on Form 10-K as filed with the SEC on February 23, 2023.

Earnings Per Share

Earnings Per Share (EPS) (Applies to AEP)

Basic EPS is calculated by dividing net earnings available to common shareholders by the weighted-average number of common shares outstanding during the period.  Diluted EPS is calculated by adjusting the weighted-average outstanding common shares, assuming conversion of all potentially dilutive stock awards.

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Derivatives and Hedging (Policies)

9 Months Ended

Sep. 30, 2023

Derivatives and Hedging

OBJECTIVES FOR UTILIZATION OF DERIVATIVE INSTRUMENTS

AEPSC is agent for and transacts on behalf of certain AEP subsidiaries, including the Registrant Subsidiaries. AEPEP is agent for and transacts on behalf of other AEP subsidiaries.

The Registrants are exposed to certain market risks as major power producers and participants in the electricity, capacity, natural gas, coal and emission allowance markets.  These risks include commodity price risks which may be subject to capacity risk, interest rate risk and credit risk.  These risks represent the risk of loss that may impact the Registrants due to changes in the underlying market prices or rates.  Management utilizes derivative instruments to manage these risks.

STRATEGIES FOR UTILIZATION OF DERIVATIVE INSTRUMENTS TO ACHIEVE OBJECTIVES

Risk Management Strategies

The strategy surrounding the use of derivative instruments primarily focuses on managing risk exposures, future cash flows and creating value utilizing both economic and formal hedging strategies. The risk management strategies also include the use of derivative instruments for trading purposes which focus on seizing market opportunities to create value driven by expected changes in the market prices of the commodities. To accomplish these objectives, the Registrants primarily employ risk management contracts including physical and financial forward purchase-and-sale contracts and, to a lesser extent, OTC swaps and options. Not all risk management contracts meet the definition of a derivative under the accounting guidance for “Derivatives and Hedging.” Derivative risk management contracts elected normal under the normal purchases and normal sales scope exception are not subject to the requirements of this accounting guidance.

The Registrants utilize power, capacity, coal, natural gas, interest rate and, to a lesser extent, heating oil, gasoline and other commodity contracts to manage the risk associated with the energy business. The Registrants utilize interest rate derivative contracts in order to manage the interest rate exposure associated with the commodity portfolio. For disclosure purposes, such risks are grouped as “Commodity,” as these risks are related to energy risk management activities. The Registrants also utilize derivative contracts to manage interest rate risk associated with debt financing. For disclosure purposes, these risks are grouped as “Interest Rate.” The amount of risk taken is determined by the Commercial Operations, Energy Supply and Finance groups in accordance with established risk management policies as approved by the Finance Committee of the Board of Directors.

Fair Value Hedging Strategies (Applies to AEP)

Parent enters into interest rate derivative transactions as part of an overall strategy to manage the mix of fixed-rate and floating-rate debt. Certain interest rate derivative transactions effectively modify exposure to interest rate risk by converting a portion of fixed-rate debt to a floating-rate. Provided specific criteria are met, these interest rate derivatives may be designated as fair value hedges.

Cash Flow Hedging Strategies

The Registrants utilize cash flow hedges on certain derivative transactions for the purchase and sale of power (“Commodity”) in order to manage the variable price risk related to forecasted purchases and sales. Management monitors the potential impacts of commodity price changes and, where appropriate, enters into derivative transactions to protect profit margins for a portion of future electricity sales and purchases. The Registrants do not hedge all commodity price risk.

The Registrants utilize a variety of interest rate derivative transactions in order to manage interest rate risk exposure. The Registrants also utilize interest rate derivative contracts to manage interest rate exposure related to future borrowings of fixed-rate debt. The Registrants do not hedge all interest rate exposure.

ACCOUNTING FOR DERIVATIVE INSTRUMENTS AND THE IMPACT ON THE FINANCIAL STATEMENTS

The accounting guidance for “Derivatives and Hedging” requires recognition of all qualifying derivative instruments as either assets or liabilities on the balance sheets at fair value. The fair values of derivative instruments accounted for using MTM accounting or hedge accounting are based on exchange prices and broker quotes. If a quoted market price is not available, the estimate of fair value is based on the best information available including valuation models that estimate future energy prices based on existing market and broker quotes and other assumptions. In order to determine the relevant fair values of the derivative instruments, the Registrants apply valuation adjustments for discounting, liquidity and credit quality.

Credit risk is the risk that a counterparty will fail to perform on the contract or fail to pay amounts due. Liquidity risk represents the risk that imperfections in the market will cause the price to vary from estimated fair value based upon prevailing market supply and demand conditions. Since energy markets are imperfect and volatile, there are inherent risks related to the underlying assumptions in models used to fair value risk management contracts. Unforeseen events may cause reasonable price curves to differ from actual price curves throughout a contract’s term and at the time a contract settles. Consequently, there could be significant adverse or favorable effects on future net income and cash flows if market prices are not consistent with management’s estimates of current market consensus for forward prices in the current period. This is particularly true for longer term contracts. Cash flows may vary based on market conditions, margin requirements and the timing of settlement of risk management contracts.

According to the accounting guidance for “Derivatives and Hedging,” the Registrants reflect the fair values of derivative instruments subject to netting agreements with the same counterparty net of related cash collateral. For certain risk management contracts, the Registrants are required to post or receive cash collateral based on third-party contractual agreements and risk profiles.

Certain qualifying derivative instruments have been designated as normal purchase or normal sale contracts, as provided in the accounting guidance for “Derivatives and Hedging.” Derivative contracts that have been designated as normal purchases or normal sales under that accounting guidance are not subject to MTM accounting treatment and are recognized on the statements of income on an accrual basis.

The accounting for the changes in the fair value of a derivative instrument depends on whether it qualifies for and has been designated as part of a hedging relationship and further, on the type of hedging relationship. Depending on the exposure, management designates a hedging instrument as a fair value hedge or a cash flow hedge.

For contracts that have not been designated as part of a hedging relationship, the accounting for changes in fair value depends on whether the derivative instrument is held for trading purposes. Unrealized and realized gains and losses on derivative instruments held for trading purposes are included in revenues on a net basis on the statements of income. Unrealized and realized gains and losses on derivative instruments not held for trading purposes are included in revenues or expenses on the statements of income depending on the relevant facts and circumstances. Certain derivatives that economically hedge future commodity risk are recorded in the same line item on the statements of income as that of the associated risk being hedged. However, unrealized and some realized gains and losses in regulated jurisdictions for both trading and non-trading derivative instruments are recorded as regulatory assets (for losses) or regulatory liabilities (for gains) in accordance with the accounting guidance for “Regulated Operations.”

Accounting for Fair Value Hedging Strategies (Applies to AEP)

For fair value hedges (i.e. hedging the exposure to changes in the fair value of an asset, liability or an identified portion thereof attributable to a particular risk), the gain or loss on the derivative instrument as well as the offsetting gain or loss on the hedged item associated with the hedged risk impacts net income during the period of change.

AEP records realized and unrealized gains or losses on interest rate swaps that are designated and qualify for fair value hedge accounting treatment and any offsetting changes in the fair value of the debt being hedged in Interest Expense on the statements of income.

Accounting for Cash Flow Hedging Strategies (Applies to AEP, AEP Texas, APCo, I&M, PSO and SWEPCo)

For cash flow hedges (i.e. hedging the exposure to variability in expected future cash flows that is attributable to a particular risk), the Registrants initially report the gain or loss on the derivative instrument as a component of Accumulated Other Comprehensive Income (Loss) on the balance sheets until the period the hedged item affects net income.

Realized gains and losses on derivative contracts for the purchase and sale of power designated as cash flow hedges are included in Total Revenues or Purchased Electricity, Fuel and Other Consumables Used for Electric Generation on the statements of income or in Regulatory Assets or Regulatory Liabilities on the balance sheets, depending on the specific nature of the risk being hedged.The Registrants reclassify gains and losses on interest rate derivative hedges related to debt financings from Accumulated Other Comprehensive Income (Loss) on the balance sheets into Interest Expense on the statements of income in those periods in which hedged interest payments occur.

Credit Risk

Management mitigates credit risk in wholesale marketing and trading activities by assessing the creditworthiness of potential counterparties before entering into transactions with them and continuing to evaluate their creditworthiness on an ongoing basis. Management uses credit agency ratings and current market-based qualitative and quantitative data as well as financial statements to assess the financial health of counterparties on an ongoing basis.

Master agreements are typically used to facilitate the netting of cash flows associated with a single counterparty and may include collateral requirements. Collateral requirements in the form of cash, letters of credit and parental/affiliate guarantees may be obtained as security from counterparties in order to mitigate credit risk. Some master agreements include margining, which requires a counterparty to post cash or letters of credit in the event exposure exceeds the established threshold. The threshold represents an unsecured credit limit which may be supported by a parental/affiliate guaranty, as determined in accordance with AEP’s credit policy. In addition, master agreements allow for termination and liquidation of all positions in the event of a default including a failure or inability to post collateral when required.

Credit-Risk-Related Contingent Features

Credit Downgrade Triggers (Applies to AEP, APCo, I&M, PSO and SWEPCo)

A limited number of derivative contracts include collateral triggering events, which include a requirement to maintain certain credit ratings.  On an ongoing basis, AEP’s risk management organization assesses the appropriateness of these collateral triggering events in contracts.  The Registrants have not experienced a downgrade below a specified credit rating threshold that would require the posting of additional collateral.Cross-Acceleration TriggersCertain interest rate derivative contracts contain cross-acceleration provisions that, if triggered, would permit the counterparty to declare a default and require settlement of the outstanding payable. These cross-acceleration provisions could be triggered if there was a non-performance event by the Registrants under any of their outstanding debt of at least $50 million and the lender on that debt has accelerated the entire repayment obligation. On an ongoing basis, AEP’s risk management organization assesses the appropriateness of these cross-acceleration provisions in contracts.Cross-Default Triggers (Applies to AEP, APCo, I&M, PSO and SWEPCo)In addition, a majority of non-exchange traded commodity contracts contain cross-default provisions that, if triggered, would permit the counterparty to declare a default and require settlement of the outstanding payable. These cross-default provisions could be triggered if there was a non-performance event by Parent or the obligor under outstanding debt or a third-party obligation that is $50 million or greater.  On an ongoing basis, AEP’s risk management organization assesses the appropriateness of these cross-default provisions in the contracts.

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Fair Value Measurements (Policies)

9 Months Ended

Sep. 30, 2023

Valuation Techniques

Fair Value Hierarchy and Valuation Techniques

The accounting guidance for “Fair Value Measurements and Disclosures” establishes a fair value hierarchy that prioritizes the inputs used to measure fair value.  The hierarchy gives the highest priority to unadjusted quoted prices in active markets for identical assets or liabilities (Level 1 measurement) and the lowest priority to unobservable inputs (Level 3 measurement).  Where observable inputs are available for substantially the full term of the asset or liability, the instrument is categorized in Level 2.  When quoted market prices are not available, pricing may be completed using comparable securities, dealer values, operating data and general market conditions to determine fair value.  Valuation models utilize various inputs such as commodity, interest rate and, to a lesser degree, volatility and credit that include quoted prices for similar assets or liabilities in active markets, quoted prices for identical or similar assets or liabilities in inactive markets, market corroborated inputs (i.e. inputs derived principally from, or correlated to, observable market data) and other observable inputs for the asset or liability.

For commercial activities, exchange-traded derivatives, namely futures contracts, are generally fair valued based on unadjusted quoted prices in active markets and are classified as Level 1.  Level 2 inputs primarily consist of OTC broker quotes in moderately active or less active markets, as well as exchange-traded derivatives where there is insufficient market liquidity to warrant inclusion in Level 1.  Management verifies price curves using these broker quotes and classifies these fair values within Level 2 when substantially all of the fair value can be corroborated.  Management typically obtains multiple broker quotes, which are nonbinding in nature but are based on recent trades in the marketplace.  When multiple broker quotes are obtained, the quoted bid and ask prices are averaged.  In certain circumstances, a broker quote may be discarded if it is a clear outlier.  Management uses a historical correlation analysis between the broker quoted location and the illiquid locations.  If the points are highly correlated, these locations are included within Level 2 as well.  Certain OTC and bilaterally executed derivative instruments are executed in less active markets with a lower availability of pricing information.  Illiquid transactions, complex structured transactions, FTRs and counterparty credit risk may require nonmarket-based inputs.  Some of these inputs may be internally developed or extrapolated and utilized to estimate fair value.  When such inputs have a significant impact on the measurement of fair value, the instrument is categorized as Level 3.  The main driver of contracts being classified as Level 3 is the inability to substantiate energy price curves in the market.  A portion of the Level 3 instruments have been economically hedged which limits potential earnings volatility.

AEP utilizes its trustee’s external pricing service to estimate the fair value of the underlying investments held in the nuclear trusts.  AEP’s investment managers review and validate the prices utilized by the trustee to determine fair value.  AEP’s management performs its own valuation testing to verify the fair values of the securities.  AEP receives audit reports of the trustee’s operating controls and valuation processes.

Assets in the nuclear trusts, cash and cash equivalents, other temporary investments restricted cash for securitized funding are classified using the following methods.  Equities are classified as Level 1 holdings if they are actively traded on exchanges.  Items classified as Level 1 are investments in money market funds, fixed income and equity mutual funds and equity securities.  They are valued based on observable inputs, primarily unadjusted quoted prices in active markets for identical assets.  Items classified as Level 2 are primarily investments in individual fixed income securities.  Fixed income securities generally do not trade on exchanges and do not have an official closing price but their valuation inputs are based on observable market data.  Pricing vendors calculate bond valuations using financial models and matrices.  The models use observable inputs including yields on benchmark securities, quotes by securities brokers, rating agency actions, discounts or premiums on securities compared to par prices, changes in yields for U.S. Treasury securities, corporate actions by bond issuers, prepayment schedules and histories, economic events and, for certain securities, adjustments to yields to reflect changes in the rate of inflation.  Other securities with model-derived valuation inputs that are observable are also classified as Level 2 investments.  Investments with unobservable valuation inputs are classified as Level 3 investments.

Fair Values of Long-term Debt

Fair Value Measurements of Long-term Debt (Applies to all Registrants)

The fair values of Long-term Debt are based on quoted market prices, without credit enhancements, for the same or similar issues and the current interest rates offered for instruments with similar maturities classified as Level 2 measurement inputs.  These instruments are not marked-to-market.  The estimates presented are not necessarily indicative of the amounts that could be realized in a current market exchange. The fair value of AEP’s Equity Units (Level 1) are valued based on publicly traded securities issued by AEP.

Trust Assets for Decommissioning and Spent Nuclear Fuel Disposal

Fair Value Measurements of Trust Assets for Decommissioning and SNF Disposal (Applies to AEP and I&M)

Nuclear decommissioning and SNF trust funds represent funds that regulatory commissions allow I&M to collect through rates to fund future decommissioning and SNF disposal liabilities.  By rules or orders, the IURC, the MPSC and the FERC established investment limitations and general risk management guidelines.  In general, limitations include:

•Acceptable investments (rated investment grade or above when purchased).

•Maximum percentage invested in a specific type of investment.

•Prohibition of investment in obligations of AEP, I&M or their affiliates.

•Withdrawals permitted only for payment of decommissioning costs and trust expenses.

I&M maintains trust funds for each regulatory jurisdiction.  Regulatory approval is required to withdraw decommissioning funds.  These funds are managed by an external investment manager that must comply with the guidelines and rules of the applicable regulatory authorities. The trust assets are invested to optimize the net of tax earnings of the trust giving consideration to liquidity, risk, diversification and other prudent investment objectives.

I&M records securities held in these trust funds in Spent Nuclear Fuel and Decommissioning Trusts on its balance sheets.  I&M records these securities at fair value.  I&M classifies debt securities in the trust funds as available-for-sale due to their long-term purpose.

Other-than-temporary impairments for investments in debt securities are considered realized losses as a result of securities being managed by an external investment management firm.  The external investment management firm makes specific investment decisions regarding the debt and equity investments held in these trusts and generally intends to sell debt securities in an unrealized loss position as part of a tax optimization strategy.  Impairments

reduce the cost basis of the securities which will affect any future unrealized gain or realized gain or loss due to the adjusted cost of investment.  I&M records unrealized gains, unrealized losses and other-than-temporary impairments from securities in these trust funds as adjustments to the regulatory liability account for the nuclear decommissioning trust funds and to regulatory assets or liabilities for the SNF disposal trust funds in accordance with their treatment in rates.  Consequently, changes in fair value of trust assets do not affect earnings or AOCI.

Fair Value Assets and Liabilities Measured on Recurring Basis

Fair Value Measurements of Financial Assets and Liabilities

The following tables set forth, by level within the fair value hierarchy, the Registrants’ financial assets and liabilities that were accounted for at fair value on a recurring basis.  As required by the accounting guidance for “Fair Value Measurements and Disclosures,” financial assets and liabilities are classified in their entirety based on the lowest level of input that is significant to the fair value measurement.  Management’s assessment of the significance of a particular input to the fair value measurement requires judgment and may affect the valuation of fair value assets and liabilities and their placement within the fair value hierarchy levels.  There have not been any significant changes in management’s valuation techniques.

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Income Taxes (Policies)	9 Months Ended
	Sep. 30, 2023
Amortization of Excess ADIT Not Subject to Normalization Requirements Policy	The Registrants include the amortization of Excess ADIT not subject to normalization requirements in the annual estimated ETR when regulatory proceedings instruct the Registrants to provide the benefits of Tax Reform to customers over multiple interim periods.  Certain regulatory proceedings instruct the Registrants to provide the benefits of Tax Reform to customers in a single period (e.g. by applying the Excess ADIT not subject to normalization requirements against an existing regulatory asset balance) and in these circumstances, the Registrants recognize the tax benefit discretely in the period recorded. The annual amount of Excess ADIT approved by the Registrant’s regulatory commissions may not impact the ETR ratably during each interim period due to the variability of pretax book income between interim periods and the application of an annual estimated ETR.

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Variable Interest Entities (Policies)

9 Months Ended

Sep. 30, 2023

Variable Interest Entities

The accounting guidance for “Variable Interest Entities” is a consolidation model that considers if a company has a variable interest in a VIE.  A VIE is a legal entity that possesses any of the following conditions: the entity’s equity at risk is not sufficient to permit the legal entity to finance its activities without additional subordinated financial support, equity owners are unable to direct the activities that most significantly impact the legal entity’s economic performance (or they possess disproportionate voting rights in relation to the economic interest in the legal entity), or the equity owners lack the obligation to absorb the legal entity’s expected losses or the right to receive the legal entity’s expected residual returns. Entities are required to consolidate a VIE when it is determined that they have a controlling financial interest in a VIE and therefore, are the primary beneficiary of that VIE, as defined by the accounting guidance for “Variable Interest Entities.” In determining whether AEP is the primary beneficiary of a VIE, management considers whether AEP has the power to direct the most significant activities of the VIE and is obligated to absorb losses or receive the expected residual returns that are significant to the VIE.

AEP holds ownership interests in businesses with varying ownership structures. AEP has not provided material financial or other support that was not previously contractually required to any of its consolidated VIEs. If an entity is determined not to be a VIE, or if the entity is determined to be a VIE and AEP is not deemed to be the primary beneficiary, the entity is accounted for under the equity method of accounting.

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Property, Plant and Equipment (Policies)	9 Months Ended
	Sep. 30, 2023
Asset Retirement Obligations	The Registrants record ARO in accordance with the accounting guidance for “Asset Retirement and Environmental Obligations” for legal obligations for asbestos removal and for the retirement of certain ash disposal facilities, wind farms, solar farms and certain coal mining facilities. The table below summarizes significant changes to the Registrants ARO recorded in 2023 and should be read in conjunction with the Property, Plant and Equipment note within the 2022 Annual Report.

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Significant Accounting Matters (Tables)

9 Months Ended

Sep. 30, 2023

Reconciliation of Cash, Cash Equivalents and Restricted Cash

	September 30, 2023
	AEP		AEP Texas		APCo
	(in millions)
Cash and Cash Equivalents	$	353.3	$	0.1	$	4.5
Restricted Cash	53.8		46.9		6.9
Total Cash, Cash Equivalents and Restricted Cash	$	407.1	$	47.0	$	11.4

	December 31, 2022
	AEP		AEP Texas		APCo
	(in millions)
Cash and Cash Equivalents	$	509.4	$	0.1	$	7.5
Restricted Cash	47.1		32.7		14.4
Total Cash, Cash Equivalents and Restricted Cash	$	556.5	$	32.8	$	21.9

Earnings Per Share

	Three Months Ended September 30,
	2023				2022
	(in millions, except per share data)
			$/share				$/share
Earnings Attributable to AEP Common Shareholders	$	953.7			$	683.7
Weighted-Average Number of Basic AEP Common Shares Outstanding	520.5		$	1.83	513.7		$	1.33
Weighted-Average Dilutive Effect of Stock-Based Awards	0.9		—		1.6		—
Weighted-Average Number of Diluted AEP Common Shares Outstanding	521.4		$	1.83	515.3		$	1.33

	Nine Months Ended September 30,
	2023				2022
	(in millions, except per share data)
			$/share				$/share
Earnings Attributable to AEP Common Shareholders	$	1,871.9			$	1,922.9
Weighted-Average Number of Basic AEP Common Shares Outstanding	516.5		$	3.62	511.2		$	3.76
Weighted-Average Dilutive Effect of Stock-Based Awards	1.3		—		1.5		(0.01)
Weighted-Average Number of Diluted AEP Common Shares Outstanding	517.8		$	3.62	512.7		$	3.75

Supplementary Information

	Nine Months Ended September 30,
Cash Flow Information	2023		2022
	(in millions)
Cash Paid for:
Interest, Net of Capitalized Amounts	$	1,148.7	$	856.8
Income Taxes	26.7		104.1
Noncash Investing and Financing Activities:
Acquisitions Under Finance Leases	38.5		22.3
Construction Expenditures Included in Current Liabilities as of September 30,	975.0		985.8
Acquisition of Nuclear Fuel Included in Current Liabilities as of September 30,	9.5		8.5
Noncash Increase in Noncurrent Assets from the Sale of the Competitive Contracted Renewables Portfolio	74.7		—

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Comprehensive Income (Tables)

9 Months Ended

Sep. 30, 2023

Changes in Accumulated Other Comprehensive Income (Loss) by Component

	Cash Flow Hedges				Pension
Three Months Ended September 30, 2023	Commodity		Interest Rate		and OPEB		Total
	(in millions)
Balance in AOCI as of June 30, 2023	$	93.5	$	12.7	$	(142.6)	$	(36.4)
Change in Fair Value Recognized in AOCI, Net of Tax	19.3		(6.9)		—		12.4
Amount of (Gain) Loss Reclassified from AOCI
Purchased Electricity, Fuel and Other Consumables Used for Electric Generation (a)	(15.6)		—		—		(15.6)
Interest Expense (a)	—		(1.3)		—		(1.3)
Amortization of Prior Service Cost (Credit)	—		—		(5.3)		(5.3)
Amortization of Actuarial (Gains) Losses	—		—		1.3		1.3
Reclassifications from AOCI, before Income Tax Benefit	(15.6)		(1.3)		(4.0)		(20.9)
Income Tax Benefit	(3.4)		(0.2)		(0.8)		(4.4)
Reclassifications from AOCI, Net of Income Tax Benefit	(12.2)		(1.1)		(3.2)		(16.5)
Net Current Period Other Comprehensive Income (Loss)	7.1		(8.0)		(3.2)		(4.1)
Balance in AOCI as of September 30, 2023	$	100.6	$	4.7	$	(145.8)	$	(40.5)

	Cash Flow Hedges				Pension
Three Months Ended September 30, 2022	Commodity		Interest Rate		and OPEB		Total
	(in millions)
Balance in AOCI as of June 30, 2022	$	533.6	$	(10.8)	$	28.6	$	551.4
Change in Fair Value Recognized in AOCI, Net of Tax	94.3		7.4		—		101.7
Amount of (Gain) Loss Reclassified from AOCI
Generation & Marketing Revenues (a)	0.2		—		—		0.2
Purchased Electricity, Fuel and Other Consumables Used for Electric Generation (a)	(222.6)		—		—		(222.6)
Interest Expense (a)	—		0.9		—		0.9
Amortization of Prior Service Cost (Credit)	—		—		(6.2)		(6.2)
Amortization of Actuarial (Gains) Losses	—		—		2.2		2.2
Reclassifications from AOCI, before Income Tax (Expense) Benefit	(222.4)		0.9		(4.0)		(225.5)
Income Tax (Expense) Benefit	(46.6)		0.1		(0.8)		(47.3)
Reclassifications from AOCI, Net of Income Tax (Expense) Benefit	(175.8)		0.8		(3.2)		(178.2)
Net Current Period Other Comprehensive Income (Loss)	(81.5)		8.2		(3.2)		(76.5)
Balance in AOCI as of September 30, 2022	$	452.1	$	(2.6)	$	25.4	$	474.9

	Cash Flow Hedges				Pension
Nine Months Ended September 30, 2023	Commodity		Interest Rate		and OPEB		Total
	(in millions)
Balance in AOCI as of December 31, 2022	$	223.5	$	0.3	$	(140.1)	$	83.7
Change in Fair Value Recognized in AOCI, Net of Tax	(170.1)		5.3		(12.9)		(177.7)
Amount of (Gain) Loss Reclassified from AOCI
Purchased Electricity, Fuel and Other Consumables Used for Electric Generation (a)	59.7		—		—		59.7
Interest Expense (a)	—		(1.1)		—		(1.1)
Amortization of Prior Service Cost (Credit)	—		—		(15.9)		(15.9)
Amortization of Actuarial (Gains) Losses	—		—		3.9		3.9
Reclassifications from AOCI, before Income Tax (Expense) Benefit	59.7		(1.1)		(12.0)		46.6
Income Tax (Expense) Benefit	12.5		(0.2)		(2.5)		9.8
Reclassifications from AOCI, Net of Income Tax (Expense) Benefit	47.2		(0.9)		(9.5)		36.8
Reclassifications of KPCo Pension and OPEB Regulatory Assets from AOCI	—		—		21.1		21.1
Income Tax (Expense) Benefit	—		—		4.4		4.4
Reclassifications of KPCo Pension and OPEB Regulatory Assets from AOCI, Net of Income Tax (Expense) Benefit	—		—		16.7		16.7
Net Current Period Other Comprehensive Income (Loss)	(122.9)		4.4		(5.7)		(124.2)
Balance in AOCI as of September 30, 2023	$	100.6	$	4.7	$	(145.8)	$	(40.5)

	Cash Flow Hedges				Pension
Nine Months Ended September 30, 2022	Commodity		Interest Rate		and OPEB		Total
	(in millions)
Balance in AOCI as of December 31, 2021	$	163.7	$	(21.3)	$	42.4	$	184.8
Change in Fair Value Recognized in AOCI, Net of Tax	629.8		16.2		—		646.0
Amount of (Gain) Loss Reclassified from AOCI
Generation & Marketing Revenues (a)	0.2		—		—		0.2
Purchased Electricity, Fuel and Other Consumables Used for Electric Generation (a)	(432.3)		—		—		(432.3)
Interest Expense (a)	—		3.1		—		3.1
Amortization of Prior Service Cost (Credit)	—		—		(16.5)		(16.5)
Amortization of Actuarial (Gains) Losses	—		—		6.4		6.4
Reclassifications from AOCI, before Income Tax (Expense) Benefit	(432.1)		3.1		(10.1)		(439.1)
Income Tax (Expense) Benefit	(90.7)		0.6		(2.1)		(92.2)
Reclassifications from AOCI, Net of Income Tax (Expense) Benefit	(341.4)		2.5		(8.0)		(346.9)
Reclassifications of KPCo Pension and OPEB Regulatory Assets to AOCI	—		—		(11.4)		(11.4)
Income Tax (Expense) Benefit	—		—		(2.4)		(2.4)
Reclassifications of KPCo Pension and OPEB Regulatory Assets to AOCI, Net of Income Tax (Expense) Benefit	—		—		(9.0)		(9.0)
Net Current Period Other Comprehensive Income (Loss)	288.4		18.7		(17.0)		290.1
Balance in AOCI as of September 30, 2022	$	452.1	$	(2.6)	$	25.4	$	474.9

(a)Amounts reclassified to the referenced line item on the statements of income.

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Rate Matters (Tables)

9 Months Ended

Sep. 30, 2023

Regulated Generating Units to be Retired

Plant	Net Book Value		Accelerated Depreciation Regulatory Asset		Cost of Removal Regulatory Liability			Projected Retirement Date		Current Authorized Recovery Period	Annual Depreciation (a)
	(dollars in millions)
Northeastern Plant, Unit 3	$	112.5	$	159.5	$	20.4	(b)	2026		(c)	$	15.0
Welsh Plant, Units 1 and 3	368.8		115.5		58.0		(d)	2028	(e)	(f)	38.6

(a)Represents the amount of annual depreciation that has been collected from customers over the prior 12-month period.

(b)Includes Northeastern Plant, Unit 4, which was retired in 2016. Removal of Northeastern Plant, Unit 4, will be performed with the removal of Northeastern Plant, Unit 3, after retirement.

(c)Northeastern Plant, Unit 3 is currently being recovered through 2040.

(d)Includes Welsh Plant, Unit 2, which was retired in 2016. Removal of Welsh Plant, Unit 2, will be performed with the removal of Welsh Plant, Units 1 and 3, after retirement.

(e)Represents projected retirement date of coal assets, units are being evaluated for conversion to natural gas after 2028.

(f)Unit 1 is being recovered through 2027 in the Louisiana jurisdiction and through 2037 in the Arkansas and Texas jurisdictions. Unit 3 is being recovered through 2032 in the Louisiana jurisdiction and through 2042 in the Arkansas and Texas jurisdictions.

Regulatory Assets Pending Final Regulatory Approval

	AEP
	September 30,		December 31,
	2023		2022
Noncurrent Regulatory Assets	(in millions)
Regulatory Assets Currently Earning a Return
Welsh Plant, Units 1 and 3 Accelerated Depreciation	$	115.5	$	85.6
Pirkey Plant	113.0		116.5
Unrecovered Winter Storm Fuel Costs (a)	101.4		121.7
Dolet Hills Power Station Fuel Costs - Louisiana	34.7		32.0
Texas Mobile Generation Costs (b)	—		17.6
Other Regulatory Assets Pending Final Regulatory Approval	21.0		19.3
Regulatory Assets Currently Not Earning a Return
Storm-Related Costs (c)(d)(e)	385.8		407.2
2020-2022 Virginia Triennial Under-Earnings	37.4		37.9
Plant Retirement Costs – Asset Retirement Obligation Costs	25.9		25.9
Other Regulatory Assets Pending Final Regulatory Approval	51.6		55.6
Total Regulatory Assets Pending Final Regulatory Approval	$	886.3	$	919.3

(a)Includes $37 million and $37 million of unrecovered winter storm fuel costs recorded as a current regulatory asset as of September 30, 2023 and December 31, 2022, respectively. See the “February 2021 Severe Winter Weather Impacts in SPP” section below for additional information.

(b)In October 2023, the PUCT issued an order approving a rider to recover deferred Texas Mobile Generation Costs. Recovery of deferred costs through the new rider is updated annually, subject to Commission review.

(c)In October 2023, the PUCO issued an order approving recovery of $34 million in Ohio storm-related costs.

(d)In April 2023, the LPSC issued an order approving the prudence and future recovery of the Louisiana storm-related regulatory assets. See “2021 Louisiana Storm Cost Filing” section below for additional information.

(e)In June 2023, storms in the Oklahoma, Louisiana and Texas service territories caused power outages and extensive damage resulting in the deferral of $58 million, $29 million and $24 million, respectively. Recovery of these storm costs will be addressed in a future request.

	AEP Texas
	September 30,		December 31,
	2023		2022
Noncurrent Regulatory Assets	(in millions)
Regulatory Assets Currently Earning a Return
Texas Mobile Generation Costs (a)	$	—	$	17.6
Regulatory Assets Currently Not Earning a Return
Storm-Related Costs	35.9		26.7
Vegetation Management Program	5.2		5.2
Texas Retail Electric Provider Bad Debt Expense	4.1		4.1
Other Regulatory Assets Pending Final Regulatory Approval	16.3		13.4
Total Regulatory Assets Pending Final Regulatory Approval	$	61.5	$	67.0

(a)In October 2023, the PUCT issued an order approving a rider to recover deferred Texas Mobile Generation Costs. Recovery of deferred costs through the new rider is updated annually, subject to Commission review.

	APCo
	September 30,		December 31,
	2023		2022
Noncurrent Regulatory Assets	(in millions)
Regulatory Assets Currently Earning a Return
COVID-19 – Virginia	$	7.0	$	7.0
Regulatory Assets Currently Not Earning a Return
Storm-Related Costs - West Virginia	72.2		72.6
2020-2022 Virginia Triennial Under-Earnings	37.4		37.9
Plant Retirement Costs – Asset Retirement Obligation Costs	25.9		25.9
Other Regulatory Assets Pending Final Regulatory Approval	5.9		1.1
Total Regulatory Assets Pending Final Regulatory Approval	$	148.4	$	144.5

	I&M
	September 30,		December 31,
	2023		2022
Noncurrent Regulatory Assets	(in millions)
Regulatory Assets Currently Earning a Return
Other Regulatory Assets Pending Final Regulatory Approval	$	0.2	$	0.1
Regulatory Assets Currently Not Earning a Return
Storm-Related Costs - Indiana	29.4		21.6
Other Regulatory Assets Pending Final Regulatory Approval	2.7		2.0
Total Regulatory Assets Pending Final Regulatory Approval	$	32.3	$	23.7

	OPCo
	September 30,		December 31,
	2023		2022
Noncurrent Regulatory Assets	(in millions)
Regulatory Assets Currently Not Earning a Return
Storm-Related Costs (a)	$	21.2	$	33.8
Total Regulatory Assets Pending Final Regulatory Approval	$	21.2	$	33.8

(a)In October 2023, the PUCO issued an order approving recovery of $34 million in storm-related costs.

	PSO
	September 30,		December 31,
	2023		2022
Noncurrent Regulatory Assets	(in millions)
Regulatory Assets Currently Not Earning a Return
Storm-Related Costs (a)	$	92.8	$	25.5
Other Regulatory Assets Pending Final Regulatory Approval	0.2		0.1
Total Regulatory Assets Pending Final Regulatory Approval	$	93.0	$	25.6

(a)In June 2023, storms caused power outages and extensive damage to the Oklahoma service territory, resulting in the deferral of $58 million. Recovery for these storm costs will be addressed in a future request.

	SWEPCo
	September 30,		December 31,
	2023		2022
Noncurrent Regulatory Assets	(in millions)
Regulatory Assets Currently Earning a Return
Welsh Plant, Units 1 and 3 Accelerated Depreciation	$	115.5	$	85.6
Pirkey Plant	113.0		116.5
Unrecovered Winter Storm Fuel Costs (a)	101.4		121.7
Dolet Hills Power Station Fuel Costs - Louisiana	34.7		32.0
Dolet Hills Power Station	12.0		9.7
Other Regulatory Assets Pending Final Regulatory Approval	1.7		2.5
Regulatory Assets Currently Not Earning a Return
Storm-Related Costs (b)(c)	53.4		151.5
Asset Retirement Obligation - Louisiana	—		11.8
Other Regulatory Assets Pending Final Regulatory Approval	14.8		16.0
Total Regulatory Assets Pending Final Regulatory Approval	$	446.5	$	547.3

(a)Includes $37 million and $37 million of unrecovered winter storm fuel costs recorded as a current regulatory asset as of September 30, 2023 and December 31, 2022, respectively. See the “February 2021 Severe Winter Weather Impacts in SPP” section below for additional information.

(b)In April 2023, the LPSC issued an order approving the prudence and future recovery of the Louisiana storm-related regulatory assets. See “2021 Louisiana Storm Cost Filing” section below for additional information.

(c)In June 2023, additional storms in the Louisiana and Texas service territories caused power outages and extensive damage resulting in the deferral of $29 million and $24 million, respectively. Recovery of these storm costs will be addressed in a future request.

Southwestern Electric Power Co [Member] | February 2021 Severe Storm Fuel Costs

Natural Gas Expenses and Purchases of Electricity to be Recovered from Customers [Table Text Block]

Jurisdiction	September 30, 2023		December 31, 2022		Approved Recovery Period	Approved Carrying Charge
	(in millions)
Arkansas	$	59.4	$	74.9	6 years	(a)
Louisiana	101.4		121.7		(b)	(b)
Texas	108.6		132.4		5 years	1.65%
Total	$	269.4	$	329.0

(a)SWEPCo is permitted to record carrying costs on the unrecovered balance of fuel costs at a weighted-cost of capital approved by the APSC. The APSC will conduct an audit of these costs in 2024. SWEPCo’s direct testimony in support of the costs is due in December 2023.

(b)In March 2021, the LPSC approved a special order granting a temporary modification to the FAC and shortly after SWEPCo began recovery of its Louisiana jurisdictional share of these fuel costs based on a five-year recovery period inclusive of an interim carrying charge equal to the prime rate. The special order states the fuel and purchased power costs incurred will be subject to a future LPSC audit.

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Commitments, Guarantees and Contingencies (Tables)

9 Months Ended

Sep. 30, 2023

Maximum Future Payments for Letters of Credit Uncommitted Facilities

Company	Amount		Maturity
	(in millions)
AEP	$	249.1	October 2023 to September 2024
AEP Texas	1.8		July 2024
APCo	6.3		September 2024
I&M	2.9		September 2024

Max Potential Loss on Master Lease Agreements

Company	Maximum Potential Loss
	(in millions)
AEP	$	44.8
AEP Texas	10.9
APCo	5.6
I&M	4.2
OPCo	6.9
PSO	4.7
SWEPCo	5.3

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Benefit Plans (Tables)

9 Months Ended

Sep. 30, 2023

Components of Net Periodic Benefit Cost

Pension Plans

Three Months Ended September 30, 2023	AEP		AEP Texas		APCo		I&M		OPCo		PSO		SWEPCo
	(in millions)
Service Cost	$	23.6	$	2.1	$	2.3	$	2.9	$	2.1	$	1.4	$	2.0
Interest Cost	54.8		4.5		6.6		6.3		5.0		2.7		3.4
Expected Return on Plan Assets	(84.8)		(7.0)		(11.2)		(11.0)		(8.6)		(4.6)		(4.8)
Amortization of Net Actuarial Loss	0.3		—		—		—		—		—		—
Net Periodic Benefit Cost (Credit)	$	(6.1)	$	(0.4)	$	(2.3)	$	(1.8)	$	(1.5)	$	(0.5)	$	0.6

Three Months Ended September 30, 2022	AEP		AEP Texas		APCo		I&M		OPCo		PSO		SWEPCo
	(in millions)
Service Cost	$	30.7	$	2.8	$	2.9	$	4.0	$	2.8	$	1.8	$	2.7
Interest Cost	37.1		3.1		4.3		4.3		3.4		1.8		2.2
Expected Return on Plan Assets	(63.4)		(5.3)		(8.1)		(8.1)		(6.2)		(3.3)		(3.6)
Amortization of Net Actuarial Loss	15.8		1.2		1.9		1.8		1.3		0.7		0.9
Net Periodic Benefit Cost	$	20.2	$	1.8	$	1.0	$	2.0	$	1.3	$	1.0	$	2.2

Nine Months Ended September 30, 2023	AEP		AEP Texas		APCo		I&M		OPCo		PSO		SWEPCo
	(in millions)
Service Cost	$	70.8	$	6.2	$	6.8	$	8.9	$	6.3	$	4.2	$	5.8
Interest Cost	164.4		13.7		19.8		18.7		14.9		8.1		10.4
Expected Return on Plan Assets	(254.4)		(21.0)		(33.5)		(33.1)		(25.6)		(13.8)		(14.5)
Amortization of Net Actuarial Loss	1.0		—		—		—		—		—		—
Net Periodic Benefit Cost (Credit)	$	(18.2)	$	(1.1)	$	(6.9)	$	(5.5)	$	(4.4)	$	(1.5)	$	1.7

Nine Months Ended September 30, 2022	AEP		AEP Texas		APCo		I&M		OPCo		PSO		SWEPCo
	(in millions)
Service Cost	$	92.3	$	8.4	$	8.6	$	12.1	$	8.4	$	5.5	$	8.0
Interest Cost	111.2		9.1		13.1		12.7		10.0		5.3		6.8
Expected Return on Plan Assets	(190.1)		(15.8)		(24.3)		(24.2)		(18.6)		(10.1)		(10.9)
Amortization of Net Actuarial Loss	47.3		3.8		5.5		5.3		4.1		2.2		2.8
Net Periodic Benefit Cost	$	60.7	$	5.5	$	2.9	$	5.9	$	3.9	$	2.9	$	6.7

OPEB

Three Months Ended September 30, 2023	AEP		AEP Texas		APCo		I&M		OPCo		PSO		SWEPCo
	(in millions)
Service Cost	$	1.1	$	0.1	$	0.1	$	0.1	$	0.1	$	0.1	$	—
Interest Cost	11.6		0.9		1.8		1.3		1.2		0.6		0.8
Expected Return on Plan Assets	(27.4)		(2.2)		(4.0)		(3.3)		(2.9)		(1.5)		(1.8)
Amortization of Prior Service Credit	(15.8)		(1.3)		(2.3)		(2.2)		(1.6)		(1.0)		(1.3)
Amortization of Net Actuarial Loss	3.7		0.3		0.6		0.5		0.4		0.2		0.3
Net Periodic Benefit Credit	$	(26.8)	$	(2.2)	$	(3.8)	$	(3.6)	$	(2.8)	$	(1.6)	$	(2.0)

Three Months Ended September 30, 2022	AEP		AEP Texas		APCo		I&M		OPCo		PSO		SWEPCo
	(in millions)
Service Cost	$	1.8	$	0.1	$	0.2	$	0.2	$	0.2	$	0.2	$	0.1
Interest Cost	7.3		0.6		1.2		0.8		0.7		0.4		0.5
Expected Return on Plan Assets	(27.5)		(2.3)		(4.1)		(3.3)		(3.0)		(1.6)		(1.8)
Amortization of Prior Service Credit	(17.9)		(1.5)		(2.6)		(2.4)		(1.8)		(1.1)		(1.4)
Net Periodic Benefit Credit	$	(36.3)	$	(3.1)	$	(5.3)	$	(4.7)	$	(3.9)	$	(2.1)	$	(2.6)

Nine Months Ended September 30, 2023	AEP		AEP Texas		APCo		I&M		OPCo		PSO		SWEPCo
	(in millions)
Service Cost	$	3.4	$	0.3	$	0.4	$	0.5	$	0.3	$	0.2	$	0.2
Interest Cost	34.7		2.7		5.5		4.0		3.5		1.8		2.2
Expected Return on Plan Assets	(82.2)		(6.7)		(12.0)		(10.1)		(8.8)		(4.4)		(5.4)
Amortization of Prior Service Credit	(47.3)		(4.0)		(6.9)		(6.5)		(4.7)		(3.0)		(3.7)
Amortization of Net Actuarial Loss	11.1		0.9		1.7		1.4		1.2		0.6		0.8
Net Periodic Benefit Credit	$	(80.3)	$	(6.8)	$	(11.3)	$	(10.7)	$	(8.5)	$	(4.8)	$	(5.9)

Nine Months Ended September 30, 2022	AEP		AEP Texas		APCo		I&M		OPCo		PSO		SWEPCo
	(in millions)
Service Cost	$	5.5	$	0.3	$	0.6	$	0.7	$	0.5	$	0.4	$	0.4
Interest Cost	21.9		1.7		3.5		2.5		2.2		1.1		1.4
Expected Return on Plan Assets	(82.5)		(6.8)		(12.2)		(10.2)		(8.9)		(4.6)		(5.5)
Amortization of Prior Service Credit	(53.6)		(4.5)		(7.8)		(7.3)		(5.4)		(3.3)		(4.0)
Net Periodic Benefit Credit	$	(108.7)	$	(9.3)	$	(15.9)	$	(14.3)	$	(11.6)	$	(6.4)	$	(7.7)

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Business Segments (Tables)

9 Months Ended

Sep. 30, 2023

Segment Reporting Information [Line Items]

Reportable Segment Information

	Three Months Ended September 30, 2023
	Vertically Integrated Utilities		Transmission and Distribution Utilities		AEP Transmission Holdco		Generation & Marketing		Corporate and Other (a)		Reconciling Adjustments		Consolidated
	(in millions)
Revenues from:
External Customers	$	3,158.1	$	1,535.2	$	94.0	$	527.5	$	26.9	$	—	$	5,341.7
Other Operating Segments	47.3		8.9		382.7		39.2		30.3		(508.4)		—
Total Revenues	$	3,205.4	$	1,544.1	$	476.7	$	566.7	$	57.2	$	(508.4)	$	5,341.7
Net Income (Loss)	$	514.0	$	206.0	$	203.9	$	132.8	$	(98.4)	$	—	$	958.3
	Three Months Ended September 30, 2022
	Vertically Integrated Utilities		Transmission and Distribution Utilities		AEP Transmission Holdco		Generation & Marketing		Corporate and Other (a)		Reconciling Adjustments		Consolidated
	(in millions)
Revenues from:
External Customers	$	3,174.6	$	1,525.5	$	81.9	$	733.1	$	11.0	$	—	$	5,526.1
Other Operating Segments	51.7		4.7		349.0		2.3		17.3		(425.0)		—
Total Revenues	$	3,226.3	$	1,530.2	$	430.9	$	735.4	$	28.3	$	(425.0)	$	5,526.1
Net Income (Loss)	$	476.9	$	165.5	$	171.4	$	96.2	$	(226.7)	$	—	$	683.3

	Nine Months Ended September 30, 2023
	Vertically Integrated Utilities		Transmission and Distribution Utilities		AEP Transmission Holdco		Generation & Marketing		Corporate and Other (a)		Reconciling Adjustments		Consolidated
	(in millions)
Revenues from:
External Customers	$	8,603.4	$	4,321.3	$	272.4	$	1,172.6	$	35.4	$	—	$	14,405.1
Other Operating Segments	134.3		27.2		1,118.4		52.5		83.9		(1,416.3)		—
Total Revenues	$	8,737.7	$	4,348.5	$	1,390.8	$	1,225.1	$	119.3	$	(1,416.3)	$	14,405.1
Net Income (Loss)	$	1,054.6	$	508.4	$	583.6	$	(62.2)	$	(209.6)	$	—	$	1,874.8
	Nine Months Ended September 30, 2022
	Vertically Integrated Utilities		Transmission and Distribution Utilities		AEP Transmission Holdco		Generation & Marketing		Corporate and Other (a)		Reconciling Adjustments		Consolidated
	(in millions)
Revenues from:
External Customers	$	8,416.4	$	4,064.5	$	244.4	$	1,997.0	$	36.1	$	—	$	14,758.4
Other Operating Segments	145.8		14.1		976.7		17.3		36.6		(1,190.5)		—
Total Revenues	$	8,562.2	$	4,078.6	$	1,221.1	$	2,014.3	$	72.7	$	(1,190.5)	$	14,758.4
Net Income (Loss)	$	1,079.4	$	483.1	$	487.8	$	278.1	$	(406.2)	$	—	$	1,922.2

	September 30, 2023
	Vertically Integrated Utilities		Transmission and Distribution Utilities		AEP Transmission Holdco		Generation & Marketing		Corporate and Other (a)			Reconciling Adjustments			Consolidated
	(in millions)
Total Assets	$	50,940.3	$	24,327.9	$	16,155.0	$	2,517.0	$	4,567.2	(b)	$	(3,381.8)	(c)	$	95,125.6

	December 31, 2022
	Vertically Integrated Utilities		Transmission and Distribution Utilities		AEP Transmission Holdco		Generation & Marketing		Corporate and Other (a)			Reconciling Adjustments			Consolidated
	(in millions)
Total Assets	$	49,761.8	$	22,920.2	$	15,215.8	$	4,520.1	$	6,768.4	(b)	$	(5,783.0)	(c)	$	93,403.3

(a)Corporate and Other primarily includes the purchasing of receivables from certain AEP utility subsidiaries. This segment also includes Parent’s guarantee revenue received from affiliates, investment income, interest income, interest expense and other nonallocated costs.

(b)Includes elimination of AEP Parent’s investments in wholly-owned subsidiary companies.

(c)Reconciling Adjustments for Total Assets primarily include elimination of intercompany advances to affiliates and intercompany accounts receivable.

	Three Months Ended September 30, 2023
	State Transcos		AEPTCo Parent			Reconciling Adjustments		AEPTCo Consolidated
	(in millions)
Revenues from:
External Customers	$	92.8	$	—		$	—	$	92.8
Sales to AEP Affiliates	369.9		—			—		369.9
Total Revenues	$	462.7	$	—		$	—	$	462.7
Net Income	$	178.2	$	1.0	(a)	$	—	$	179.2
	Three Months Ended September 30, 2022
	State Transcos		AEPTCo Parent			Reconciling Adjustments		AEPTCo Consolidated
	(in millions)
Revenues from:
External Customers	$	87.2	$	—		$	—	$	87.2
Sales to AEP Affiliates	331.3		—			—		331.3
Total Revenues	$	418.5	$	—		$	—	$	418.5
Net Income	$	152.6	$	0.1	(a)	$	—	$	152.7

	Nine Months Ended September 30, 2023
	State Transcos		AEPTCo Parent			Reconciling Adjustments		AEPTCo Consolidated
	(in millions)
Revenues from:
External Customers	$	269.2	$	—		$	—	$	269.2
Sales to AEP Affiliates	1,080.0		—			—		1,080.0
Total Revenues	$	1,349.2	$	—		$	—	$	1,349.2
Net Income	$	514.0	$	3.6	(a)	$	—	$	517.6
	Nine Months Ended September 30, 2022
	State Transcos		AEPTCo Parent			Reconciling Adjustments		AEPTCo Consolidated
	(in millions)
Revenues from:
External Customers	$	249.5	$	—		$	—	$	249.5
Sales to AEP Affiliates	933.8		—			—		933.8
Total Revenues	$	1,183.3	$	—		$	—	$	1,183.3
Net Income	$	426.4	$	0.2	(a)	$	—	$	426.6

	September 30, 2023
	State Transcos		AEPTCo Parent			Reconciling Adjustments			AEPTCo Consolidated
	(in millions)
Total Assets	$	14,760.8	$	5,561.2	(b)	$	(5,610.0)	(c)	$	14,712.0
	December 31, 2022
	State Transcos		AEPTCo Parent			Reconciling Adjustments			AEPTCo Consolidated
	(in millions)
Total Assets	$	13,875.6	$	4,817.4	(b)	$	(4,878.8)	(c)	$	13,814.2

(a)Includes the elimination of AEPTCo Parent’s equity earnings in the State Transcos.

(b)Primarily relates to Notes Receivable from the State Transcos.

(c)Primarily relates to the elimination of Notes Receivable from the State Transcos.

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Derivatives and Hedging (Tables)

9 Months Ended

Sep. 30, 2023

Notional Volume of Derivative Instruments

Notional Volume of Derivative Instruments

September 30, 2023

Primary Risk Exposure	Unit of Measure	AEP		AEP Texas		APCo		I&M		OPCo		PSO		SWEPCo
		(in millions)
Commodity:
Power	MWhs	262.3		—		28.4		9.0		2.3		5.6		4.4
Natural Gas	MMBtus	149.8		—		27.3		—		—		25.3		13.1
Heating Oil and Gasoline	Gallons	8.3		2.2		1.3		0.8		1.7		1.1		1.2
Interest Rate	USD	$	80.1	$	—	$	—	$	—	$	—	$	—	$	—
Interest Rate on Long-term Debt	USD	$	950.0	$	—	$	—	$	—	$	—	$	—	$	—

December 31, 2022

Primary Risk Exposure	Unit of Measure	AEP		AEP Texas		APCo		I&M		OPCo		PSO		SWEPCo
		(in millions)
Commodity:
Power	MWhs	226.8		—		17.9		4.2		2.5		2.9		2.2
Natural Gas	MMBtus	77.1		—		1.9		—		—		1.9		2.1
Heating Oil and Gasoline	Gallons	6.9		1.9		1.0		0.7		1.4		0.9		1.0
Interest Rate	USD	$	99.9	$	—	$	—	$	—	$	—	$	—	$	—
Interest Rate on Long-term Debt	USD	$	1,650.0	$	—	$	—	$	—	$	—	$	200.0	$	—

Fair Value of Derivative Instruments

AEP

	September 30, 2023
	Risk Management Contracts		Hedging Contracts				Gross Amounts of Risk Management Assets/ Liabilities Recognized		Gross Amounts Offset in the Statement of Financial Position (b)		Net Amounts of Assets/Liabilities Presented in the Statement of Financial Position (c)
Balance Sheet Location	Commodity (a)		Commodity (a)		Interest Rate (a)
	(in millions)
Current Risk Management Assets	$	595.7	$	55.6	$	—	$	651.3	$	(388.6)	$	262.7
Long-term Risk Management Assets	465.3		83.3		—		548.6		(258.4)		290.2
Total Assets	1,061.0		138.9		—		1,199.9		(647.0)		552.9
Current Risk Management Liabilities	460.3		9.9		43.2		513.4		(361.9)		151.5
Long-term Risk Management Liabilities	374.8		1.2		94.9		470.9		(192.5)		278.4
Total Liabilities	835.1		11.1		138.1		984.3		(554.4)		429.9
Total MTM Derivative Contract Net Assets (Liabilities)	$	225.9	$	127.8	$	(138.1)	$	215.6	$	(92.6)	$	123.0

	December 31, 2022
	Risk Management Contracts		Hedging Contracts				Gross Amounts of Risk Management Assets/ Liabilities Recognized		Gross Amounts Offset in the Statement of Financial Position (b)		Net Amounts of Assets/Liabilities Presented in the Statement of Financial Position (c)
Balance Sheet Location	Commodity (a)		Commodity (a)		Interest Rate (a)
	(in millions)
Current Risk Management Assets	$	965.4	$	212.2	$	1.8	$	1,179.4	$	(830.6)	$	348.8
Long-term Risk Management Assets	565.6		148.9		14.3		728.8		(444.7)		284.1
Total Assets	1,531.0		361.1		16.1		1,908.2		(1,275.3)		632.9
Current Risk Management Liabilities	663.8		60.4		41.4		765.6		(620.4)		145.2
Long-term Risk Management Liabilities	412.0		17.4		91.1		520.5		(175.3)		345.2
Total Liabilities	1,075.8		77.8		132.5		1,286.1		(795.7)		490.4
Total MTM Derivative Contract Net Assets (Liabilities)	$	455.2	$	283.3	$	(116.4)	$	622.1	$	(479.6)	$	142.5

AEP Texas

	September 30, 2023
	Risk Management		Gross Amounts Offset		Net Amounts of Assets/Liabilities
	Contracts –		in the Statement of		Presented in the Statement of
Balance Sheet Location	Commodity (a)		Financial Position (b)		Financial Position (c)
	(in millions)
Current Risk Management Assets	$	0.4	$	—	$	0.4
Long-term Risk Management Assets	—		—		—
Total Assets	0.4		—		0.4
Current Risk Management Liabilities	—		—		—
Long-term Risk Management Liabilities	—		—		—
Total Liabilities	—		—		—
Total MTM Derivative Contract Net Assets	$	0.4	$	—	$	0.4

	December 31, 2022
	Risk Management		Gross Amounts Offset		Net Amounts of Assets/Liabilities
	Contracts –		in the Statement of		Presented in the Statement of
Balance Sheet Location	Commodity (a)		Financial Position (b)		Financial Position (c)
	(in millions)
Current Risk Management Assets	$	—	$	—	$	—
Long-term Risk Management Assets	—		—		—
Total Assets	—		—		—
Current Risk Management Liabilities	—		—		—
Long-term Risk Management Liabilities	—		—		—
Total Liabilities	—		—		—
Total MTM Derivative Contract Net Assets	$	—	$	—	$	—

APCo

	September 30, 2023
	Risk Management		Gross Amounts Offset		Net Amounts of Assets/Liabilities
	Contracts –		in the Statement of		Presented in the Statement of
Balance Sheet Location	Commodity (a)		Financial Position (b)		Financial Position (c)
	(in millions)
Current Risk Management Assets	$	48.8	$	(2.4)	$	46.4
Long-term Risk Management Assets	0.8		(0.6)		0.2
Total Assets	49.6		(3.0)		46.6
Current Risk Management Liabilities	4.2		(2.4)		1.8
Long-term Risk Management Liabilities	1.5		(0.6)		0.9
Total Liabilities	5.7		(3.0)		2.7
Total MTM Derivative Contract Net Assets	$	43.9	$	—	$	43.9

	December 31, 2022
	Risk Management		Gross Amounts Offset		Net Amounts of Assets/Liabilities
	Contracts –		in the Statement of		Presented in the Statement of
Balance Sheet Location	Commodity (a)		Financial Position (b)		Financial Position (c)
	(in millions)
Current Risk Management Assets	$	69.3	$	(0.2)	$	69.1
Long-term Risk Management Assets	0.7		(0.7)		—
Total Assets	70.0		(0.9)		69.1
Current Risk Management Liabilities	4.1		(0.5)		3.6
Long-term Risk Management Liabilities	0.7		(0.6)		0.1
Total Liabilities	4.8		(1.1)		3.7
Total MTM Derivative Contract Net Assets	$	65.2	$	0.2	$	65.4

I&M

	September 30, 2023
	Risk Management		Gross Amounts Offset		Net Amounts of Assets/Liabilities
	Contracts –		in the Statement of		Presented in the Statement of
Balance Sheet Location	Commodity (a)		Financial Position (b)		Financial Position (c)
	(in millions)
Current Risk Management Assets	$	20.2	$	(4.4)	$	15.8
Long-term Risk Management Assets	6.6		(1.2)		5.4
Total Assets	26.8		(5.6)		21.2
Current Risk Management Liabilities	5.3		(4.2)		1.1
Long-term Risk Management Liabilities	1.0		(1.0)		—
Total Liabilities	6.3		(5.2)		1.1
Total MTM Derivative Contract Net Assets (Liabilities)	$	20.5	$	(0.4)	$	20.1

	December 31, 2022
	Risk Management		Gross Amounts Offset		Net Amounts of Assets/Liabilities
	Contracts –		in the Statement of		Presented in the Statement of
Balance Sheet Location	Commodity (a)		Financial Position (b)		Financial Position (c)
	(in millions)
Current Risk Management Assets	$	16.0	$	(0.8)	$	15.2
Long-term Risk Management Assets	0.5		(0.3)		0.2
Total Assets	16.5		(1.1)		15.4
Current Risk Management Liabilities	0.9		(0.9)		—
Long-term Risk Management Liabilities	0.3		(0.3)		—
Total Liabilities	1.2		(1.2)		—
Total MTM Derivative Contract Net Assets	$	15.3	$	0.1	$	15.4

OPCo

	September 30, 2023
	Risk Management		Gross Amounts Offset		Net Amounts of Assets/Liabilities
	Contracts –		in the Statement of		Presented in the Statement of
Balance Sheet Location	Commodity (a)		Financial Position (b)		Financial Position (c)
	(in millions)
Current Risk Management Assets	$	0.3	$	—	$	0.3
Long-term Risk Management Assets	—		—		—
Total Assets	0.3		—		0.3
Current Risk Management Liabilities	5.7		—		5.7
Long-term Risk Management Liabilities	45.9		—		45.9
Total Liabilities	51.6		—		51.6
Total MTM Derivative Contract Net Liabilities	$	(51.3)	$	—	$	(51.3)

	December 31, 2022
	Risk Management		Gross Amounts Offset		Net Amounts of Assets/Liabilities
	Contracts –		in the Statement of		Presented in the Statement of
Balance Sheet Location	Commodity (a)		Financial Position (b)		Financial Position (c)
	(in millions)
Current Risk Management Assets	$	—	$	—	$	—
Long-term Risk Management Assets	—		—		—
Total Assets	—		—		—
Current Risk Management Liabilities	2.1		(0.3)		1.8
Long-term Risk Management Liabilities	37.9		—		37.9
Total Liabilities	40.0		(0.3)		39.7
Total MTM Derivative Contract Net Assets (Liabilities)	$	(40.0)	$	0.3	$	(39.7)

PSO

	September 30, 2023
	Risk Management		Gross Amounts Offset		Net Amounts of Assets/Liabilities
	Contracts –		in the Statement of		Presented in the Statement of
Balance Sheet Location	Commodity (a)		Financial Position (b)		Financial Position (c)
	(in millions)
Current Risk Management Assets	$	28.3	$	(0.1)	$	28.2
Long-term Risk Management Assets	0.3		(0.3)		—
Total Assets	28.6		(0.4)		28.2
Current Risk Management Liabilities	7.2		(0.1)		7.1
Long-term Risk Management Liabilities	0.4		(0.3)		0.1
Total Liabilities	7.6		(0.4)		7.2
Total MTM Derivative Contract Net Assets	$	21.0	$	—	$	21.0

	December 31, 2022
	Risk Management Contracts –		Hedging Contracts		Gross Amounts of Risk Management Assets/Liabilities Recognized		Gross Amounts Offset in the Statement of Financial Position (b)		Net Amounts of Assets/Liabilities Presented in the Statement of Financial Position (c)
Balance Sheet Location	Commodity (a)		Interest Rate (a)
	(in millions)
Current Risk Management Assets	$	24.1	$	1.6	$	25.7	$	(0.4)	$	25.3
Long-term Risk Management Assets	—		—		—		—		—
Total Assets	24.1		1.6		25.7		(0.4)		25.3
Current Risk Management Liabilities	2.1		—		2.1		(0.5)		1.6
Long-term Risk Management Liabilities	—		—		—		—		—
Total Liabilities	2.1		—		2.1		(0.5)		1.6
Total MTM Derivative Contract Net Assets	$	22.0	$	1.6	$	23.6	$	0.1	$	23.7

SWEPCo

	September 30, 2023
	Risk Management		Gross Amounts Offset		Net Amounts of Assets/Liabilities
	Contracts –		in the Statement of		Presented in the Statement of
Balance Sheet Location	Commodity (a)		Financial Position (b)		Financial Position (c)
	(in millions)
Current Risk Management Assets	$	17.6	$	(0.5)	$	17.1
Long-term Risk Management Assets	—		—		—
Total Assets	17.6		(0.5)		17.1
Current Risk Management Liabilities	3.6		(0.5)		3.1
Long-term Risk Management Liabilities	0.4		—		0.4
Total Liabilities	4.0		(0.5)		3.5
Total MTM Derivative Contract Net Assets	$	13.6	$	—	$	13.6

	December 31, 2022
	Risk Management		Gross Amounts Offset		Net Amounts of Assets/Liabilities
	Contracts –		in the Statement of		Presented in the Statement of
Balance Sheet Location	Commodity (a)		Financial Position (b)		Financial Position (c)
	(in millions)
Current Risk Management Assets	$	16.8	$	(0.4)	$	16.4
Long-term Risk Management Assets	—		—		—
Total Assets	16.8		(0.4)		16.4
Current Risk Management Liabilities	2.0		(0.6)		1.4
Long-term Risk Management Liabilities	—		—		—
Total Liabilities	2.0		(0.6)		1.4
Total MTM Derivative Contract Net Assets	$	14.8	$	0.2	$	15.0

(a)Derivative instruments within these categories are disclosed as gross.  These instruments are subject to master netting agreements and are presented on the balance sheets on a net basis in accordance with the accounting guidance for “Derivatives and Hedging.”

(b)Amounts include counterparty netting of risk management and hedging contracts and associated cash collateral in accordance with the accounting guidance for “Derivatives and Hedging.”

(c)All derivative contracts subject to a master netting arrangement or similar agreement are offset in the statement of financial position.

Amount of Gain (Loss) Recognized on Risk Management Contracts

Amount of Gain (Loss) Recognized on Risk Management Contracts

	Three Months Ended September 30, 2023
Location of Gain (Loss)	AEP		AEP Texas		APCo		I&M		OPCo		PSO		SWEPCo
	(in millions)
Vertically Integrated Utilities Revenues	$	(9.5)	$	—	$	—	$	—	$	—	$	—	$	—
Generation & Marketing Revenues	(1.4)		—		—		—		—		—		—
Electric Generation, Transmission and Distribution Revenues	—		—		0.1		(9.6)		—		—		—
Purchased Electricity, Fuel and Other Consumables Used for Electric Generation	0.2		—		0.2		—		—		—		—
Maintenance	(0.4)		(0.1)		(0.1)		—		(0.1)		(0.1)		(0.1)
Regulatory Assets (a)	1.2		0.5		1.2		1.7		0.5		(3.5)		(1.1)
Regulatory Liabilities (a)	43.0		0.4		11.9		1.6		—		12.9		12.7
Total Gain (Loss) on Risk Management Contracts	$	33.1	$	0.8	$	13.3	$	(6.3)	$	0.4	$	9.3	$	11.5

	Three Months Ended September 30, 2022
Location of Gain (Loss)	AEP		AEP Texas			APCo		I&M		OPCo		PSO		SWEPCo
	(in millions)
Vertically Integrated Utilities Revenues	$	2.1	$	—		$	—	$	—	$	—	$	—	$	—
Generation & Marketing Revenues	116.7		—			—		—		—		—		—
Electric Generation, Transmission and Distribution Revenues	—		—			0.3		—		—		—		—
Other Revenues - Nonaffiliated	—		—		`	—		1.9		—		—		—
Purchased Electricity, Fuel and Other Consumables Used for Electric Generation	0.9		—			0.9		0.1		—		—		—
Other Operation	1.4		0.4			0.1		0.1		0.2		0.2		0.2
Maintenance	2.0		0.5			0.2		0.2		0.4		0.2		0.3
Regulatory Assets (a)	4.3		—			—		0.1		4.1		—		0.1
Regulatory Liabilities (a)	103.2		(1.5)			59.7		3.8		0.9		19.7		7.0
Total Gain (Loss) on Risk Management Contracts	$	230.6	$	(0.6)		$	61.2	$	6.2	$	5.6	$	20.1	$	7.6

	Nine Months Ended September 30, 2023
Location of Gain (Loss)	AEP		AEP Texas		APCo		I&M		OPCo		PSO		SWEPCo
	(in millions)
Vertically Integrated Utilities Revenues	$	2.2	$	—	$	—	$	—	$	—	$	—	$	—
Generation & Marketing Revenues	(290.6)		—		—		—		—		—		—
Electric Generation, Transmission and Distribution Revenues	—		—		0.1		2.1		—		—		—
Purchased Electricity, Fuel and Other Consumables Used for Electric Generation	2.2		—		2.1		0.1		—		—		—
Other Operation	(0.1)		—		—		—		—		—		—
Maintenance	(0.6)		(0.2)		(0.1)		—		(0.1)		(0.1)		(0.1)
Regulatory Assets (a)	(36.0)		—		—		(0.4)		(24.6)		(7.0)		(3.5)
Regulatory Liabilities (a)	143.5		0.4		3.1		6.4		—		73.3		58.2
Total Gain (Loss) on Risk Management Contracts	$	(179.4)	$	0.2	$	5.2	$	8.2	$	(24.7)	$	66.2	$	54.6

	Nine Months Ended September 30, 2022
Location of Gain (Loss)	AEP		AEP Texas		APCo		I&M		OPCo		PSO		SWEPCo
	(in millions)
Vertically Integrated Utilities Revenues	$	2.2	$	—	$	—	$	—	$	—	$	—	$	—
Generation & Marketing Revenues	390.0		—		—		—		—		—		—
Electric Generation, Transmission and Distribution Revenues	—		—		0.4		(0.1)		—		—		—
Other Revenues - Nonaffiliated	—		—		—		1.9		—		—		—
Purchased Electricity, Fuel and Other Consumables Used for Electric Generation	3.3		—		3.0		0.1		—		0.1		—
Other Operation	3.7		1.1		0.3		0.4		0.6		0.5		0.6
Maintenance	5.2		1.4		0.7		0.5		0.9		0.6		0.8
Regulatory Assets (a)	49.3		0.1		—		(1.2)		49.0		3.6		(2.1)
Regulatory Liabilities (a)	250.1		(0.6)		79.9		7.0		2.5		71.4		64.8
Total Gain on Risk Management Contracts	$	703.8	$	2.0	$	84.3	$	8.6	$	53.0	$	76.2	$	64.1

(a)Represents realized and unrealized gains and losses subject to regulatory accounting treatment recorded as either current or noncurrent on the balance sheets.

Impact of Fair Value Hedges on the Condensed Balance Sheet

	Carrying Amount of the Hedged Liabilities				Cumulative Amount of Fair Value Hedging Adjustment Included in the Carrying Amount of the Hedged Liabilities
	September 30, 2023		December 31, 2022		September 30, 2023		December 31, 2022
	(in millions)
Long-term Debt (a) (b)	$	(840.1)	$	(855.5)	$	106.1	$	89.7

(a)Amounts included on the Balance Sheet within Noncurrent Liabilities line item Long-term Debt.

(b)Amounts include $(32) million and $(38) million as of September 30, 2023 and December 31, 2022, respectively, for the fair value hedge adjustment of hedged debt obligations for which hedge accounting has been discontinued.

Gain (Loss) on Hedging Instruments

	Three Months Ended September 30,				Nine Months Ended September 30,
	2023		2022		2023		2022
	(in millions)
Gain (Loss) on Interest Rate Contracts:
Fair Value Hedging Instruments (a)	$	(13.4)	$	(36.0)	$	(10.7)	$	(98.4)
Fair Value Portion of Long-term Debt (a)	13.4		36.0		10.7		98.4

(a)Gain (Loss) is included in Interest Expense on the statements of income.

Impact of Cash Flow Hedges on the Condensed Balance Sheet

Impact of Cash Flow Hedges on AEP’s Balance Sheets

	September 30, 2023				December 31, 2022
	Commodity		Interest Rate		Commodity		Interest Rate
	(in millions)
AOCI Gain Net of Tax	$	100.6	$	4.7	$	223.5	$	0.3
Portion Expected to be Reclassed to Net Income During the Next Twelve Months	36.1		4.3		119.9		0.3

Impact of Cash Flow Hedges on the Registrant Subsidiaries’ Balance Sheets

	September 30, 2023				December 31, 2022
	Interest Rate
			Expected to be				Expected to be
			Reclassified to				Reclassified to
			Net Income During				Net Income During
	AOCI Gain (Loss)		the Next		AOCI Gain (Loss)		the Next
Company	Net of Tax		Twelve Months		Net of Tax		Twelve Months
	(in millions)
AEP Texas	$	2.8	$	0.3	$	(0.3)	$	(0.2)
APCo	6.1		0.8		6.7		0.8
I&M	(5.6)		(0.4)		(5.1)		(0.6)
PSO	(0.2)		—		1.3		0.1
SWEPCo	1.4		0.3		1.1		0.2

XML

Fair Value Measurements (Tables)

9 Months Ended

Sep. 30, 2023

Book Values and Fair Values of Long-term Debt

	September 30, 2023				December 31, 2022
Company	Book Value		Fair Value		Book Value		Fair Value
	(in millions)
AEP (a)	$	39,489.1	$	33,559.8	$	36,801.0	$	32,915.9
AEP Texas	5,926.7		4,963.8		5,657.8		5,045.8
AEPTCo	5,473.7		4,270.8		4,782.8		3,940.5
APCo	5,587.3		4,901.4		5,410.5		5,079.2
I&M	3,443.6		2,920.6		3,260.8		2,929.0
OPCo	3,366.2		2,645.2		2,970.3		2,516.6
PSO	2,384.2		1,942.5		1,912.8		1,635.8
SWEPCo	3,646.2		2,944.8		3,391.6		2,870.9

(a)The fair value amounts include debt related to AEP’s Equity Units and had a fair value of $0 and $877 million as of September 30, 2023 and December 31, 2022, respectively. See “Equity Units” section of Note 12 for additional information.

Other Temporary Investments

	September 30, 2023
			Gross		Gross
			Unrealized		Unrealized		Fair
Other Temporary Investments and Restricted Cash	Cost		Gains		Losses		Value
	(in millions)
Restricted Cash (a)	$	53.8	$	—	$	—	$	53.8
Other Cash Deposits	13.4		—		—		13.4
Fixed Income Securities – Mutual Funds (b)	170.4		—		(10.4)		160.0
Equity Securities – Mutual Funds	15.0		22.6		—		37.6
Total Other Temporary Investments and Restricted Cash	$	252.6	$	22.6	$	(10.4)	$	264.8

	December 31, 2022
			Gross		Gross
			Unrealized		Unrealized		Fair
Other Temporary Investments and Restricted Cash	Cost		Gains		Losses		Value
	(in millions)
Restricted Cash (a)	$	47.1	$	—	$	—	$	47.1
Other Cash Deposits	9.0		—		—		9.0
Fixed Income Securities – Mutual Funds (b)	152.4		—		(8.3)		144.1
Equity Securities – Mutual Funds	15.1		19.4		—		34.5
Total Other Temporary Investments and Restricted Cash	$	223.6	$	19.4	$	(8.3)	$	234.7

(a)Primarily represents amounts held for the repayment of debt.

(b)Primarily short and intermediate maturities which may be sold and do not contain maturity dates.

Debt and Equity Securities Within Other Temporary Investments

	Three Months Ended September 30,				Nine Months Ended September 30,
	2023		2022		2023		2022
	(in millions)
Proceeds from Investment Sales	$	0.8	$	—	$	0.8	$	15.0
Purchases of Investments	14.6		11.8		16.9		13.4
Gross Realized Gains on Investment Sales	0.3		—		0.3		3.6
Gross Realized Losses on Investment Sales	—		—		—		0.5

Nuclear Trust Fund Investments

	September 30, 2023								December 31, 2022
			Gross		Gross		Other-Than-				Gross		Gross		Other-Than-
	Fair		Unrealized		Unrealized		Temporary		Fair		Unrealized		Unrealized		Temporary
	Value		Gains		Losses		Impairments		Value		Gains		Losses		Impairments
	(in millions)
Cash and Cash Equivalents	$	20.5	$	—	$	—	$	—	$	21.2	$	—	$	—	$	—
Fixed Income Securities:
United States Government	1,204.7		0.6		(30.8)		(38.5)		1,123.8		11.8		(14.9)		(18.8)
Corporate Debt	136.8		0.4		(12.4)		(5.3)		61.6		0.7		(7.7)		(9.6)
State and Local Government	3.2		—		—		—		3.3		0.1		—		(0.1)
Subtotal Fixed Income Securities	1,344.7		1.0		(43.2)		(43.8)		1,188.7		12.6		(22.6)		(28.5)
Equity Securities - Domestic	2,174.5		1,620.5		(1.9)		—		2,131.3		1,483.7		(6.4)		—
Spent Nuclear Fuel and Decommissioning Trusts	$	3,539.7	$	1,621.5	$	(45.1)	$	(43.8)	$	3,341.2	$	1,496.3	$	(29.0)	$	(28.5)

Securities Activity Within the Decommissioning and SNF Trusts

	Three Months Ended September 30,				Nine Months Ended September 30,
	2023		2022		2023		2022
	(in millions)
Proceeds from Investment Sales	$	933.0	$	588.5	$	2,139.3	$	1,818.4
Purchases of Investments	949.5		601.6		2,182.8		1,854.8
Gross Realized Gains on Investment Sales	36.8		24.6		91.6		41.3
Gross Realized Losses on Investment Sales	7.7		8.4		20.0		33.5

Contractual Maturities, Fair Value of Debt Securities in Nuclear Trusts

	Fair Value of Fixed
	Income Securities
	(in millions)
Within 1 year	$	393.6
After 1 year through 5 years	504.4
After 5 years through 10 years	188.6
After 10 years	258.1
Total	$	1,344.7

Fair Value, Assets and Liabilities Measured on Recurring Basis

AEP

Assets and Liabilities Measured at Fair Value on a Recurring Basis

September 30, 2023

	Level 1		Level 2		Level 3		Other		Total
Assets:	(in millions)
Other Temporary Investments and Restricted Cash
Restricted Cash	$	53.8	$	—	$	—	$	—	$	53.8
Other Cash Deposits (a)	—		—		—		13.4		13.4
Fixed Income Securities – Mutual Funds	160.0		—		—		—		160.0
Equity Securities – Mutual Funds (b)	37.6		—		—		—		37.6
Total Other Temporary Investments and Restricted Cash	251.4		—		—		13.4		264.8
Risk Management Assets
Risk Management Commodity Contracts (c) (d)	11.4		721.3		319.2		(627.4)		424.5
Cash Flow Hedges:
Commodity Hedges (c)	—		119.3		19.3		(10.2)		128.4
Total Risk Management Assets	11.4		840.6		338.5		(637.6)		552.9
Spent Nuclear Fuel and Decommissioning Trusts
Cash and Cash Equivalents (e)	10.0		—		—		10.5		20.5
Fixed Income Securities:
United States Government	—		1,204.7		—		—		1,204.7
Corporate Debt	—		136.8		—		—		136.8
State and Local Government	—		3.2		—		—		3.2
Subtotal Fixed Income Securities	—		1,344.7		—		—		1,344.7
Equity Securities – Domestic (b)	2,174.5		—		—		—		2,174.5
Total Spent Nuclear Fuel and Decommissioning Trusts	2,184.5		1,344.7		—		10.5		3,539.7
Total Assets	$	2,447.3	$	2,185.3	$	338.5	$	(613.7)	$	4,357.4
Liabilities:
Risk Management Liabilities
Risk Management Commodity Contracts (c) (d)	$	24.8	$	646.3	$	155.0	$	(534.9)	$	291.2
Cash Flow Hedges:
Commodity Hedges (c)	—		10.1		0.7		(10.2)		0.6
Fair Value Hedges	—		138.1		—		—		138.1
Total Risk Management Liabilities	$	24.8	$	794.5	$	155.7	$	(545.1)	$	429.9

AEP

Assets and Liabilities Measured at Fair Value on a Recurring Basis

December 31, 2022

	Level 1		Level 2		Level 3		Other		Total
Assets:	(in millions)
Other Temporary Investments and Restricted Cash
Restricted Cash	$	47.1	$	—	$	—	$	—	$	47.1
Other Cash Deposits (a)	—		—		—		9.0		9.0
Fixed Income Securities – Mutual Funds	144.1		—		—		—		144.1
Equity Securities – Mutual Funds (b)	34.5		—		—		—		34.5
Total Other Temporary Investments and Restricted Cash	225.7		—		—		9.0		234.7
Risk Management Assets
Risk Management Commodity Contracts (c) (f)	15.0		1,197.5		314.4		(1,211.5)		315.4
Cash Flow Hedges:
Commodity Hedges (c)	—		332.6		26.7		(52.8)		306.5
Interest Rate Hedges	—		11.0		—		—		11.0
Total Risk Management Assets	15.0		1,541.1		341.1		(1,264.3)		632.9
Spent Nuclear Fuel and Decommissioning Trusts
Cash and Cash Equivalents (e)	11.3		—		—		9.9		21.2
Fixed Income Securities:
United States Government	—		1,123.8		—		—		1,123.8
Corporate Debt	—		61.6		—		—		61.6
State and Local Government	—		3.3		—		—		3.3
Subtotal Fixed Income Securities	—		1,188.7		—		—		1,188.7
Equity Securities – Domestic (b)	2,131.3		—		—		—		2,131.3
Total Spent Nuclear Fuel and Decommissioning Trusts	2,142.6		1,188.7		—		9.9		3,341.2
Total Assets	$	2,383.3	$	2,729.8	$	341.1	$	(1,245.4)	$	4,208.8
Liabilities:
Risk Management Liabilities
Risk Management Commodity Contracts (c) (f)	$	21.8	$	870.9	$	179.0	$	(731.9)	$	339.8
Cash Flow Hedges:
Commodity Hedges (c)	—		74.3		1.7		(52.8)		23.2
Fair Value Hedges	—		127.4		—		—		127.4
Total Risk Management Liabilities	$	21.8	$	1,072.6	$	180.7	$	(784.7)	$	490.4

AEP Texas

Assets and Liabilities Measured at Fair Value on a Recurring Basis

September 30, 2023

	Level 1		Level 2		Level 3		Other		Total
Assets:	(in millions)
Restricted Cash for Securitized Funding	$	46.9	$	—	$	—	$	—	$	46.9
Risk Management Assets
Risk Management Commodity Contracts (g)	—		0.4		—		—		0.4
Total Assets	$	46.9	$	0.4	$	—	$	—	$	47.3

December 31, 2022

	Level 1		Level 2		Level 3		Other		Total
Assets:	(in millions)
Restricted Cash for Securitized Funding	$	32.7	$	—	$	—	$	—	$	32.7

APCo

Assets and Liabilities Measured at Fair Value on a Recurring Basis

September 30, 2023

	Level 1		Level 2		Level 3		Other		Total
Assets:	(in millions)
Restricted Cash for Securitized Funding	$	6.9	$	—	$	—	$	—	$	6.9
Risk Management Assets
Risk Management Commodity Contracts (c) (g)	—		3.8		45.2		(2.4)		46.6
Total Assets	$	6.9	$	3.8	$	45.2	$	(2.4)	$	53.5
Liabilities:
Risk Management Liabilities
Risk Management Commodity Contracts (c) (g)	$	—	$	5.0	$	0.1	$	(2.4)	$	2.7

December 31, 2022

	Level 1		Level 2		Level 3		Other		Total
Assets:	(in millions)
Restricted Cash for Securitized Funding	$	14.4	$	—	$	—	$	—	$	14.4
Risk Management Assets
Risk Management Commodity Contracts (c) (g)	—		0.7		69.4		(1.0)		69.1
Total Assets	$	14.4	$	0.7	$	69.4	$	(1.0)	$	83.5
Liabilities:
Risk Management Liabilities
Risk Management Commodity Contracts (c) (g)	$	—	$	4.6	$	0.3	$	(1.4)	$	3.5

I&M

Assets and Liabilities Measured at Fair Value on a Recurring Basis

September 30, 2023

	Level 1		Level 2		Level 3		Other		Total
Assets:	(in millions)
Risk Management Assets
Risk Management Commodity Contracts (c) (g)	$	—	$	18.1	$	7.9	$	(4.8)	$	21.2
Spent Nuclear Fuel and Decommissioning Trusts
Cash and Cash Equivalents (e)	10.0		—		—		10.5		20.5
Fixed Income Securities:
United States Government	—		1,204.7		—		—		1,204.7
Corporate Debt	—		136.8		—		—		136.8
State and Local Government	—		3.2		—		—		3.2
Subtotal Fixed Income Securities	—		1,344.7		—		—		1,344.7
Equity Securities - Domestic (b)	2,174.5		—		—		—		2,174.5
Total Spent Nuclear Fuel and Decommissioning Trusts	2,184.5		1,344.7		—		10.5		3,539.7
Total Assets	$	2,184.5	$	1,362.8	$	7.9	$	5.7	$	3,560.9
Liabilities:
Risk Management Liabilities
Risk Management Commodity Contracts (c) (g)	$	—	$	4.2	$	1.3	$	(4.4)	$	1.1

December 31, 2022

	Level 1		Level 2		Level 3		Other		Total
Assets:	(in millions)
Risk Management Assets
Risk Management Commodity Contracts (c) (g)	$	—	$	11.3	$	5.3	$	(1.2)	$	15.4
Spent Nuclear Fuel and Decommissioning Trusts
Cash and Cash Equivalents (e)	11.3		—		—		9.9		21.2
Fixed Income Securities:
United States Government	—		1,123.8		—		—		1,123.8
Corporate Debt	—		61.6		—		—		61.6
State and Local Government	—		3.3		—		—		3.3
Subtotal Fixed Income Securities	—		1,188.7		—		—		1,188.7
Equity Securities - Domestic (b)	2,131.3		—		—		—		2,131.3
Total Spent Nuclear Fuel and Decommissioning Trusts	2,142.6		1,188.7		—		9.9		3,341.2
Total Assets	$	2,142.6	$	1,200.0	$	5.3	$	8.7	$	3,356.6
Liabilities:
Risk Management Liabilities
Risk Management Commodity Contracts (c) (g)	$	—	$	0.6	$	0.7	$	(1.3)	$	—

OPCo

Assets and Liabilities Measured at Fair Value on a Recurring Basis

September 30, 2023

	Level 1		Level 2		Level 3		Other		Total
Assets:	(in millions)
Risk Management Assets
Risk Management Commodity Contracts (g)	$	—	$	0.3	$	—	$	—	$	0.3
Liabilities:
Risk Management Liabilities
Risk Management Commodity Contracts (g)	$	—	$	—	$	51.6	$	—	$	51.6

December 31, 2022

	Level 1		Level 2		Level 3		Other		Total
Liabilities:	(in millions)
Risk Management Liabilities
Risk Management Commodity Contracts (c) (g)	$	—	$	—	$	40.0	$	(0.3)	$	39.7

PSO

Assets and Liabilities Measured at Fair Value on a Recurring Basis

September 30, 2023

	Level 1		Level 2		Level 3		Other		Total
Assets:	(in millions)
Risk Management Assets
Risk Management Commodity Contracts (c) (g)	$	—	$	0.5	$	28.1	$	(0.4)	$	28.2
Liabilities:
Risk Management Liabilities
Risk Management Commodity Contracts (c) (g)	$	—	$	6.6	$	0.9	$	(0.3)	$	7.2

December 31, 2022

	Level 1		Level 2		Level 3		Other		Total
Assets:	(in millions)
Risk Management Assets
Risk Management Commodity Contracts (c) (g)	$	—	$	—	$	24.0	$	1.3	$	25.3
Cash Flow Hedges:
Interest Rate Hedges	—		1.6		—		(1.6)		—
Total Assets	$	—	$	1.6	$	24.0	$	(0.3)	$	25.3
Liabilities:
Risk Management Liabilities
Risk Management Commodity Contracts (c) (g)	$	—	$	1.7	$	0.3	$	(0.4)	$	1.6

SWEPCo

Assets and Liabilities Measured at Fair Value on a Recurring Basis

September 30, 2023

	Level 1		Level 2		Level 3		Other		Total
Assets:	(in millions)
Risk Management Assets
Risk Management Commodity Contracts (c) (g)	$	—	$	0.2	$	17.4	$	(0.5)	$	17.1
Liabilities:
Risk Management Liabilities
Risk Management Commodity Contracts (c) (g)	$	—	$	3.1	$	0.9	$	(0.5)	$	3.5

December 31, 2022

	Level 1		Level 2		Level 3		Other		Total
Assets:	(in millions)
Risk Management Assets
Risk Management Commodity Contracts (c) (g)	$	—	$	2.2	$	14.6	$	(0.4)	$	16.4
Liabilities:
Risk Management Liabilities
Risk Management Commodity Contracts (c) (g)	$	—	$	1.6	$	0.4	$	(0.6)	$	1.4

(a)Amounts in “Other’’ column primarily represent cash deposits in bank accounts with financial institutions or third-parties.  Level 1 and Level 2 amounts primarily represent investments in money market funds.

(b)Amounts represent publicly traded equity securities and equity-based mutual funds.

(c)Amounts in “Other’’ column primarily represent counterparty netting of risk management and hedging contracts and associated cash collateral under the accounting guidance for “Derivatives and Hedging.’’

(d)The September 30, 2023 maturities of the net fair value of risk management contracts prior to cash collateral, assets/(liabilities), were as follows: Level 1 matures $(4) million in 2023 and $(9) million in periods 2024-2026; Level 2 matures $64 million in periods 2024-2026, $10 million in periods 2027-2028 and $1 million in periods 2029-2033; Level 3 matures $37 million in 2023, $118 million in periods 2024-2026, $18 million in periods 2027-2028 and $(9) million in periods 2029-2033.  Risk management commodity contracts are substantially comprised of power contracts.

(e)Amounts in “Other’’ column primarily represent accrued interest receivables from financial institutions.  Level 1 amounts primarily represent investments in money market funds.

(f)The December 31, 2022 maturities of the net fair value of risk management contracts prior to cash collateral, assets/(liabilities), were as follows: Level 1 matures $(7) million in 2023; Level 2 matures $182 million in 2023, $134 million in periods 2024-2026, $10 million in periods 2027-2028 and $1 million in periods 2029-2033; Level 3 matures $128 million in 2023, $6 million in periods 2024-2026, $6 million in periods 2027-2028 and $(5) million in periods 2029-2033.  Risk management commodity contracts are substantially comprised of power contracts.

(g)Substantially comprised of power contracts for the Registrant Subsidiaries.

Changes in Fair Value of Net Trading Derivatives and Other Investments

Three Months Ended September 30, 2023	AEP		APCo		I&M		OPCo		PSO		SWEPCo
	(in millions)
Balance as of June 30, 2023	$	126.1	$	39.4	$	6.8	$	(54.0)	$	43.1	$	26.0
Realized Gain (Loss) Included in Net Income (or Changes in Net Assets) (a) (b)	39.7		10.0		2.3		—		14.2		14.0
Unrealized Gain (Loss) Included in Net Income (or Changes in Net Assets) Relating to Assets Still Held at the Reporting Date (a)	72.7		—		—		—		—		—
Realized and Unrealized Gains (Losses) Included in Other Comprehensive Income (c)	4.9		—		—		—		—		—
Settlements	(87.1)		(16.5)		(3.7)		1.1		(30.5)		(24.8)
Transfers out of Level 3 (e)	6.6		0.1		(0.1)		—		—		—
Changes in Fair Value Allocated to Regulated Jurisdictions (f)	19.9		12.1		1.3		1.3		0.4		1.3
Balance as of September 30, 2023	$	182.8	$	45.1	$	6.6	$	(51.6)	$	27.2	$	16.5

Three Months Ended September 30, 2022	AEP		APCo		I&M		OPCo		PSO		SWEPCo
	(in millions)
Balance as of June 30, 2022	$	283.9	$	79.6	$	9.8	$	(48.4)	$	64.5	$	45.4
Realized Gain (Loss) Included in Net Income (or Changes in Net Assets) (a) (b)	64.3		20.1		2.1		0.3		23.8		15.4
Unrealized Gain (Loss) Included in Net Income (or Changes in Net Assets) Relating to Assets Still Held at the Reporting Date (a)	(12.6)		—		—		—		—		—
Realized and Unrealized Gains (Losses) Included in Other Comprehensive Income (c)	13.1		—		—		—		—		—
Settlements	(138.3)		(34.6)		(4.8)		(1.1)		(49.1)		(31.6)
Transfers into Level 3 (d) (e)	(0.5)		—		—		—		—		—
Transfers out of Level 3 (e)	3.5		—		—		—		—		—
Changes in Fair Value Allocated to Regulated Jurisdictions (f)	72.5		41.5		2.5		6.0		5.2		7.0
Balance as of September 30, 2022	$	285.9	$	106.6	$	9.6	$	(43.2)	$	44.4	$	36.2

Nine Months Ended September 30, 2023	AEP		APCo		I&M		OPCo		PSO		SWEPCo
	(in millions)
Balance as of December 31, 2022	$	160.4	$	69.1	$	4.6	$	(40.0)	$	23.7	$	14.2
Realized Gain (Loss) Included in Net Income (or Changes in Net Assets) (a) (b)	(41.3)		(47.0)		(1.7)		(2.4)		3.5		5.9
Unrealized Gain (Loss) Included in Net Income (or Changes in Net Assets) Relating to Assets Still Held at the Reporting Date (a)	67.7		—		—		—		—		—
Realized and Unrealized Gains (Losses) Included in Other Comprehensive Income (c)	(10.5)		—		—		—		—		—
Settlements	(85.9)		(22.1)		(2.9)		3.5		(27.2)		(20.0)
Transfers into Level 3 (d) (e)	(6.1)		—		—		—		—		—
Transfers out of Level 3 (e)	3.8		—		—		—		—		—
Changes in Fair Value Allocated to Regulated Jurisdictions (f)	94.7		45.1		6.6		(12.7)		27.2		16.4
Balance as of September 30, 2023	$	182.8	$	45.1	$	6.6	$	(51.6)	$	27.2	$	16.5

Nine Months Ended September 30, 2022	AEP		APCo		I&M		OPCo		PSO		SWEPCo
	(in millions)
Balance as of December 31, 2021	$	103.1	$	41.7	$	(0.7)	$	(92.5)	$	12.1	$	10.9
Realized Gain (Loss) Included in Net Income (or Changes in Net Assets) (a) (b)	69.3		3.0		3.7		4.6		24.2		35.8
Unrealized Gain (Loss) Included in Net Income (or Changes in Net Assets) Relating to Assets Still Held at the Reporting Date (a)	(44.6)		—		—		—		—		—
Realized and Unrealized Gains (Losses) Included in Other Comprehensive Income (c)	29.4		—		—		—		—		—
Settlements	(153.8)		(44.7)		(3.0)		0.2		(36.3)		(45.0)
Transfers into Level 3 (d) (e)	1.7		—		—		—		—		—
Transfers out of Level 3 (e)	13.2		—		—		—		—		—
Changes in Fair Value Allocated to Regulated Jurisdictions (f)	267.6		106.6		9.6		44.5		44.4		34.5
Balance as of September 30, 2022	$	285.9	$	106.6	$	9.6	$	(43.2)	$	44.4	$	36.2

(a)Included in revenues on the statements of income.

(b)Represents the change in fair value between the beginning of the reporting period and the settlement of the risk management commodity contract.

(c)Included in cash flow hedges on the statements of comprehensive income.

(d)Represents existing assets or liabilities that were previously categorized as Level 2.

(e)Transfers are recognized based on their value at the beginning of the reporting period that the transfer occurred.

(f)Relates to the net gains (losses) of those contracts that are not reflected on the statements of income.  These changes in fair value are recorded as regulatory liabilities for net gains and as regulatory assets for net losses or accounts payable.

Significant Unobservable Inputs for Level 3

Significant Unobservable Inputs

September 30, 2023

							Significant	Input/Range
	Type of	Fair Value				Valuation	Unobservable					Weighted
Company	Input	Assets		Liabilities		Technique	Input	Low		High		Average (c)
		(in millions)
AEP	Energy Contracts	$	224.3	$	147.7	Discounted Cash Flow	Forward Market Price (a)	$	5.98	$	137.52	$	45.43
AEP	Natural Gas Contracts	—		0.2		Discounted Cash Flow	Forward Market Price (b)	3.55		3.55		3.55
AEP	FTRs	114.2		7.8		Discounted Cash Flow	Forward Market Price (a)	(17.92)		17.07		0.29
APCo	FTRs	45.2		0.1		Discounted Cash Flow	Forward Market Price (a)	(3.92)		9.08		1.63
I&M	FTRs	7.9		1.3		Discounted Cash Flow	Forward Market Price (a)	(4.36)		9.08		1.08
OPCo	Energy Contracts	—		51.6		Discounted Cash Flow	Forward Market Price (a)	19.89		65.40		41.66
PSO	FTRs	28.1		0.9		Discounted Cash Flow	Forward Market Price (a)	(17.92)		2.04		(4.42)
SWEPCo	Natural Gas Contracts	—		0.2		Discounted Cash Flow	Forward Market Price (b)	3.55		3.55		3.55
SWEPCo	FTRs	17.4		0.7		Discounted Cash Flow	Forward Market Price (a)	(17.92)		2.04		(4.42)

December 31, 2022

							Significant	Input/Range
	Type of	Fair Value				Valuation	Unobservable					Weighted
Company	Input	Assets		Liabilities		Technique	Input (a)	Low		High		Average (c)
		(in millions)
AEP	Energy Contracts	$	204.0	$	167.4	Discounted Cash Flow	Forward Market Price	$	2.91	$	187.34	$	49.14
AEP	FTRs	137.1		13.3		Discounted Cash Flow	Forward Market Price	(36.45)		20.72		1.18
APCo	FTRs	69.4		0.3		Discounted Cash Flow	Forward Market Price	(2.82)		18.88		3.89
I&M	FTRs	5.3		0.7		Discounted Cash Flow	Forward Market Price	0.16		18.79		1.23
OPCo	Energy Contracts	—		40.0		Discounted Cash Flow	Forward Market Price	2.91		187.34		48.76
PSO	FTRs	24.0		0.3		Discounted Cash Flow	Forward Market Price	(36.45)		3.40		(7.55)
SWEPCo	FTRs	14.6		0.4		Discounted Cash Flow	Forward Market Price	(36.45)		3.40		(7.55)

(a)Represents market prices in dollars per MWh.

(b)Represents market prices in dollars per MMBtu.

(c)The weighted average is the product of the forward market price of the underlying commodity and volume weighted by term.

Sensitivity of Fair Value Measurements

Significant Unobservable Input	Position	Change in Input	Impact on Fair Value Measurement
Forward Market Price	Buy	Increase (Decrease)	Higher (Lower)
Forward Market Price	Sell	Increase (Decrease)	Lower (Higher)

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Income Taxes (Tables)

9 Months Ended

Sep. 30, 2023

Schedule of Effective Income Tax Rate Reconciliation

	Three Months Ended September 30, 2023
	AEP		AEP Texas		AEPTCo		APCo		I&M		OPCo		PSO		SWEPCo
U.S. Federal Statutory Rate	21.0	%	21.0	%	21.0	%	21.0	%	21.0	%	21.0	%	21.0	%	21.0	%
Increase (decrease) due to:
State Income Tax, net of Federal Benefit	1.4	%	0.5	%	2.8	%	2.2	%	2.1	%	0.8	%	3.0	%	(4.3)	%
Tax Reform Excess ADIT Reversal	(5.7)	%	(1.3)	%	(0.2)	%	(5.3)	%	(8.5)	%	(6.8)	%	(17.0)	%	(6.2)	%
Production and Investment Tax Credits	(5.1)	%	0.1	%	—	%	(0.1)	%	(0.7)	%	—	%	(46.9)	%	(25.5)	%
Flow Through	0.1	%	0.2	%	0.3	%	1.8	%	0.7	%	0.8	%	0.3	%	(0.2)	%
AFUDC Equity	(1.4)	%	(1.4)	%	(2.4)	%	(1.5)	%	(0.5)	%	(0.8)	%	(1.6)	%	(0.8)	%
Discrete Tax Adjustments	(4.1)	%	—	%	—	%	—	%	—	%	—	%	—	%	—	%
Other	0.1	%	(0.5)	%	(1.0)	%	0.7	%	(3.5)	%	1.3	%	(0.2)	%	0.2	%
Effective Income Tax Rate	6.3	%	18.6	%	20.5	%	18.8	%	10.6	%	16.3	%	(41.4)	%	(15.8)	%

	Three Months Ended September 30, 2022
	AEP		AEP Texas		AEPTCo		APCo		I&M		OPCo		PSO		SWEPCo
U.S. Federal Statutory Rate	21.0	%	21.0	%	21.0	%	21.0	%	21.0	%	21.0	%	21.0	%	21.0	%
Increase (decrease) due to:
State Income Tax, net of Federal Benefit	(0.8)	%	0.5	%	2.6	%	(6.2)	%	2.7	%	0.7	%	3.0	%	(5.3)	%
Tax Reform Excess ADIT Reversal	(9.7)	%	(2.0)	%	0.3	%	(8.6)	%	(13.3)	%	(6.2)	%	(21.9)	%	(4.6)	%
Production and Investment Tax Credits	(12.0)	%	(0.4)	%	—	%	—	%	—	%	—	%	(43.7)	%	(24.1)	%
Flow Through	(0.3)	%	0.2	%	0.3	%	(0.7)	%	(1.5)	%	0.4	%	0.4	%	(1.3)	%
AFUDC Equity	(1.4)	%	(1.2)	%	(1.9)	%	(0.4)	%	(0.6)	%	(0.8)	%	(0.4)	%	(0.2)	%
Discrete Tax Adjustments	(0.2)	%	—	%	—	%	—	%	—	%	—	%	—	%	—	%
Other	1.0	%	0.2	%	0.2	%	—	%	(0.5)	%	0.2	%	0.2	%	(0.2)	%
Effective Income Tax Rate	(2.4)	%	18.3	%	22.5	%	5.1	%	7.8	%	15.3	%	(41.4)	%	(14.7)	%

	Nine Months Ended September 30, 2023
	AEP		AEP Texas		AEPTCo		APCo		I&M		OPCo		PSO		SWEPCo
U.S. Federal Statutory Rate	21.0	%	21.0	%	21.0	%	21.0	%	21.0	%	21.0	%	21.0	%	21.0	%
Increase (decrease) due to:
State Income Tax, net of Federal Benefit	1.7	%	0.5	%	2.7	%	2.4	%	2.3	%	0.9	%	2.8	%	(2.9)	%
Tax Reform Excess ADIT Reversal	(6.0)	%	(1.3)	%	0.1	%	(4.8)	%	(7.6)	%	(7.3)	%	(17.1)	%	(5.3)	%
Production and Investment Tax Credits	(7.4)	%	—	%	—	%	(0.1)	%	(0.6)	%	—	%	(48.9)	%	(26.7)	%
Flow Through	(0.2)	%	0.2	%	0.3	%	0.1	%	(1.7)	%	0.8	%	0.3	%	(0.3)	%
AFUDC Equity	(1.4)	%	(1.2)	%	(2.0)	%	(1.2)	%	(0.4)	%	(0.8)	%	(1.5)	%	(0.5)	%
Discrete Tax Adjustments	(2.8)	%	—	%	—	%	1.5	%	0.7	%	—	%	—	%	—	%
Other	0.3	%	(0.2)	%	(0.5)	%	0.4	%	(1.2)	%	0.5	%	(0.2)	%	0.2	%
Effective Income Tax Rate	5.2	%	19.0	%	21.6	%	19.3	%	12.5	%	15.1	%	(43.6)	%	(14.5)	%

	Nine Months Ended September 30, 2022
	AEP		AEP Texas		AEPTCo		APCo		I&M		OPCo		PSO		SWEPCo
U.S. Federal Statutory Rate	21.0	%	21.0	%	21.0	%	21.0	%	21.0	%	21.0	%	21.0	%	21.0	%
Increase (decrease) due to:
State Income Tax, net of Federal Benefit	0.7	%	0.5	%	2.7	%	(0.8)	%	1.3	%	0.8	%	3.2	%	(1.5)	%
Tax Reform Excess ADIT Reversal	(7.8)	%	(2.0)	%	0.3	%	(10.3)	%	(15.7)	%	(7.3)	%	(20.8)	%	(4.8)	%
Production and Investment Tax Credits	(8.7)	%	(0.4)	%	—	%	—	%	(1.4)	%	—	%	(39.5)	%	(22.5)	%
Flow Through	—	%	0.2	%	0.3	%	0.2	%	(1.6)	%	0.5	%	0.3	%	(0.8)	%
AFUDC Equity	(1.1)	%	(1.2)	%	(1.9)	%	(0.8)	%	(0.8)	%	(0.7)	%	(0.4)	%	(0.4)	%
Discrete Tax Adjustments	(0.2)	%	—	%	—	%	(1.8)	%	—	%	—	%	—	%	0.3	%
Other	0.6	%	0.1	%	0.1	%	—	%	0.2	%	0.1	%	0.2	%	—	%
Effective Income Tax Rate	4.5	%	18.2	%	22.5	%	7.5	%	3.0	%	14.4	%	(36.0)	%	(8.7)	%

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Financing Activities (Tables)

9 Months Ended

Sep. 30, 2023

Long-term Debt

Type of Debt	September 30, 2023		December 31, 2022
	(in millions)
Senior Unsecured Notes	$	32,881.6	$	30,174.8
Pollution Control Bonds	1,771.0		1,770.2
Notes Payable	141.5		269.7
Securitization Bonds	407.0		487.8
Spent Nuclear Fuel Obligation (a)	296.3		285.6
Junior Subordinated Notes (b)	2,386.6		2,381.3
Other Long-term Debt	1,605.1		1,431.6
Total Long-term Debt Outstanding	39,489.1		36,801.0
Long-term Debt Due Within One Year	2,773.6		2,486.4
Long-term Debt	$	36,715.5	$	34,314.6

(a)Pursuant to the Nuclear Waste Policy Act of 1982, I&M, a nuclear licensee, has an obligation to the United States Department of Energy for SNF disposal. The obligation includes a one-time fee for nuclear fuel consumed prior to April 7, 1983. Trust fund assets related to this obligation were $345 million and $330 million as of September 30, 2023 and December 31, 2022, respectively, and are included in Spent Nuclear Fuel and Decommissioning Trusts on the balance sheets.

(b)See “Equity Units” section below for additional information.

Long-term Debt Issuances

		Principal		Interest
Company	Type of Debt	Amount (a)		Rate	Due Date
Issuances:		(in millions)		(%)
AEP	Senior Unsecured Notes	$	850.0	5.63	2033
AEPTCo	Senior Unsecured Notes	700.0		5.40	2053
AEP Texas	Pollution Control Bonds	60.0		4.25	2030
AEP Texas	Senior Unsecured Notes	450.0		5.40	2033
APCo	Other Long-term Debt	200.0		Variable	2024
I&M	Senior Unsecured Notes	500.0		5.63	2053
OPCo	Senior Unsecured Notes	400.0		5.00	2033
PSO	Senior Unsecured Notes	475.0		5.25	2033
SWEPCo	Senior Unsecured Notes	350.0		5.30	2033
Non-Registrant:
KPCo	Pollution Control Bonds	65.0		4.70	2026
Transource Energy	Other Long-term Debt	14.0		Variable	2025
Total Issuances		$	4,064.0

(a)Amounts indicated on the statements of cash flows are net of issuance costs and premium or discount and will not tie to the issuance amounts.

Retirements and Principal Payments

		Principal		Interest
Company	Type of Debt	Amount Paid		Rate	Due Date
Retirements and Principal Payments:		(in millions)		(%)
AEP	Senior Unsecured Notes	$	600.0	Variable	2023
AEP Texas	Pollution Control Bonds	60.0		0.90	2023
AEP Texas	Senior Unsecured Notes	125.0		3.09	2023
AEP Texas	Securitization Bonds	31.5		2.85	2024
AEP Texas	Securitization Bonds	23.5		2.06	2025
APCo	Securitization Bonds	9.7		2.01	2023
APCo	Securitization Bonds	16.8		3.77	2028
I&M	Senior Unsecured Notes	250.0		3.20	2023
I&M	Notes Payable	1.8		Variable	2023
I&M	Notes Payable	3.7		Variable	2024
I&M	Notes Payable	13.8		Variable	2025
I&M	Notes Payable	12.0		0.93	2025
I&M	Notes Payable	20.6		3.44	2026
I&M	Notes Payable	20.5		5.93	2027
I&M	Other Long-term Debt	1.7		6.00	2025
OPCo	Other Long-term Debt	0.6		1.15	2028
PSO	Other Long-term Debt	0.4		3.00	2027
SWEPCo	Notes Payable	25.0		6.37	2024
SWEPCo	Notes Payable	30.9		4.58	2032
SWEPCo	Other Long-Term Debt	38.2		4.68	2028
Non-Registrant:
KPCo	Pollution Control Bonds	65.0		2.35	2023
Transource Energy	Senior Unsecured Notes	2.6		2.75	2050
Total Retirements and Principal Payments		$	1,353.3

Utility Money Pool Participants' Money Pool Activity and Authorized Borrowing Limits

	Maximum					Average				Net Loans to
	Borrowings			Maximum		Borrowings		Average		(Borrowings from)		Authorized
	from the			Loans to the		from the		Loans to the		the Utility Money		Short-term
	Utility			Utility		Utility		Utility		Pool as of		Borrowing
Company	Money Pool			Money Pool		Money Pool		Money Pool		September 30, 2023		Limit
	(in millions)
AEP Texas	$	477.5		$	42.0	$	250.4	$	42.0	$	42.0	$	500.0
AEPTCo	471.3			309.4		134.3		76.0		7.2		820.0		(a)
APCo	388.6			19.8		280.8		19.0		(183.2)		500.0
I&M	475.3			112.2		126.0		49.3		21.2		500.0
OPCo	485.7			64.7		207.1		40.2		(113.3)		500.0
PSO	375.0			121.5		106.3		53.9		9.2		400.0
SWEPCo	401.6		(b)	25.8		165.3		16.5		(48.9)		400.0

(a)    Amount represents the combined authorized short-term borrowing limit the State Transcos have from FERC or state regulatory commissions.

(b)    SWEPCo’s maximum borrowings from the Utility Money Pool exceeded the authorized short-term borrowing limit by $1.6 million on March 15, 2023. On March 16, 2023, SWEPCo’s borrowings from the Utility Money Pool were reduced below the $400 million authorized limit and borrowings have continued to remain below the authorized limit.

Nonutility Money Pool Activity

		Maximum Loans		Average Loans		Loans to the Nonutility
		to the Nonutility		to the Nonutility		Money Pool as of
Company		Money Pool		Money Pool		September 30, 2023
	(in millions)
AEP Texas		$	7.0	$	6.9	$	7.0
SWEPCo		2.7		2.3		2.7

Direct Borrowing Activity

Maximum

Maximum

Average

Average

Borrowings from

Loans to

Authorized

Borrowings

Loans

Borrowings

Loans

AEP as of

AEP as of

Short-term

from AEP

to AEP

from AEP

to AEP

September 30, 2023

September 30, 2023

Borrowing Limit

(in millions)

$

37.9

$

158.1

$

3.0

$

67.5

$

33.4

$

—

$

50.0

(a)

(a)    Amount represents the combined authorized short-term borrowing limit the State Transcos have from FERC or state regulatory commissions.

Maximum and Minimum Interest Rates for Funds Either Borrowed from or Loaned to Utility Money Pool

	Nine Months Ended September 30,
	2023		2022
Maximum Interest Rate	5.81	%	3.39	%
Minimum Interest Rate	4.66	%	0.10	%

Average Interest Rates for Funds Borrowed from and Loaned to Utility Money Pool

	Average Interest Rate for Funds				Average Interest Rate for Funds
	Borrowed from the Utility Money Pool				Loaned to the Utility Money Pool
	for Nine Months Ended September 30,				for Nine Months Ended September 30,
Company	2023		2022		2023		2022
AEP Texas	5.44	%	0.90	%	5.70	%	1.82	%
AEPTCo	5.29	%	1.03	%	5.52	%	2.14	%
APCo	5.47	%	1.39	%	5.47	%	2.13	%
I&M	5.13	%	1.38	%	5.54	%	1.46	%
OPCo	5.37	%	1.81	%	5.60	%	1.22	%
PSO	5.48	%	1.70	%	5.24	%	0.75	%
SWEPCo	5.25	%	1.67	%	5.72	%	0.55	%

Maximum Minimum Average Interest Rates for Funds Borrowed from Loaned to Nonutility Money Pool

Nine Months Ended September 30, 2023

Nine Months Ended September 30, 2022

Maximum

Minimum

Average

Maximum

Minimum

Average

Interest Rate

Interest Rate

Interest Rate

Interest Rate

Interest Rate

Interest Rate

for Funds

for Funds

for Funds

for Funds

for Funds

for Funds

Loaned to

Loaned to

Loaned to

Loaned to

Loaned to

Loaned to

the Nonutility

the Nonutility

the Nonutility

the Nonutility

the Nonutility

the Nonutility

Company

Money Pool

Money Pool

Money Pool

Money Pool

Money Pool

Money Pool

AEP Texas

5.81

%

4.66

%

5.47

%

3.39

%

0.46

%

1.51

%

SWEPCo

5.81

%

4.66

%

5.49

%

3.39

%

0.46

%

1.52

%

Maximum Minimum and Average Interest Rates for Funds Borrowed from and Loaned to AEP

	Maximum		Minimum		Maximum		Minimum		Average		Average
	Interest Rate		Interest Rate		Interest Rate		Interest Rate		Interest Rate		Interest Rate
Nine Months	for Funds		for Funds		for Funds		for Funds		for Funds		for Funds
Ended	Borrowed		Borrowed		Loaned		Loaned		Borrowed		Loaned
September 30,	from AEP		from AEP		to AEP		to AEP		from AEP		to AEP
2023	5.81	%	4.53	%	5.81	%	4.53	%	5.43	%	5.46	%
2022	3.39	%	0.46	%	3.37	%	0.46	%	1.56	%	1.38	%

Short Term Debt

		September 30, 2023				December 31, 2022
		Outstanding		Interest		Outstanding		Interest
Company	Type of Debt	Amount		Rate (a)		Amount		Rate (a)
		(dollars in millions)
AEP	Securitized Debt for Receivables (b)	$	900.0	5.60	%	$	750.0	4.67	%
AEP	Commercial Paper	1,826.5		5.64	%	2,862.2		4.80	%
AEP	Term Loan	—		—	%	150.0		5.17	%
AEP	Term Loan	—		—	%	125.0		5.17	%
AEP	Term Loan	—		—	%	100.0		5.23	%
AEP	Term Loan	—		—	%	125.0		4.87	%
SWEPCo	Notes Payable	3.9		7.67	%	—		—	%
	Total Short-term Debt	$	2,730.4			$	4,112.2

(a)Weighted-average rate as of September 30, 2023 and December 31, 2022, respectively.

(b)Amount of securitized debt for receivables as accounted for under the “Transfers and Servicing” accounting guidance.

Comparative Accounts Receivable Information

	Three Months Ended September 30,						Nine Months Ended September 30,
	2023			2022			2023			2022
	(dollars in millions)
Effective Interest Rates on Securitization of Accounts Receivable	5.55		%	2.25		%	5.23		%	1.16		%
Net Uncollectible Accounts Receivable Written-Off	$	8.8		$	9.5		$	22.9		$	23.1

Customer Accounts Receivable Managed Portfolio

	September 30, 2023		December 31, 2022
	(in millions)
Accounts Receivable Retained Interest and Pledged as Collateral Less Uncollectible Accounts	$	1,257.0	$	1,167.7
Short-term – Securitized Debt of Receivables	900.0		750.0
Delinquent Securitized Accounts Receivable	59.5		44.2
Bad Debt Reserves Related to Securitization	42.2		39.7
Unbilled Receivables Related to Securitization	301.8		360.9

Accounts Receivable and Accrued Unbilled Revenues

Company	September 30, 2023		December 31, 2022
	(in millions)
APCo	$	170.5	$	194.4
I&M	176.2		166.9
OPCo	479.3		478.6
PSO	211.5		155.5
SWEPCo	210.2		194.0

Fees Paid to AEP Credit for Customer Accounts Receivable Sold

	Three Months Ended September 30,				Nine Months Ended September 30,
Company	2023		2022		2023		2022
	(in millions)
APCo	$	4.1	$	2.8	$	13.3	$	5.6
I&M	4.4		2.8		12.2		6.5
OPCo	7.4		7.3		22.3		22.2
PSO	4.6		2.4		11.3		4.6
SWEPCo	5.2		3.2		13.9		6.0

Proceeds on Sale of Receivables to AEP Credit

	Three Months Ended September 30,				Nine Months Ended September 30,
Company	2023		2022		2023		2022
	(in millions)
APCo	$	451.6	$	360.4	$	1,372.7	$	1,114.9
I&M	553.3		558.5		1,575.9		1,574.3
OPCo	850.3		874.1		2,518.6		2,284.0
PSO	633.8		588.5		1,510.3		1,380.4
SWEPCo	558.4		593.6		1,456.5		1,425.3

XML

Variable Interest Entities (Tables)

9 Months Ended

12 Months Ended

Sep. 30, 2023

Dec. 31, 2022

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Consolidated Assets And Liabilities Of Variable Interest Entities

American Electric Power Company, Inc. and Subsidiary Companies
Variable Interest Entities
September 30, 2023
	Registrant Subsidiaries
	SWEPCo Sabine		I&M DCC Fuel		AEP Texas Transition Funding			AEP Texas Restoration Funding			APCo Appalachian Consumer Rate Relief Funding
	(in millions)
ASSETS
Current Assets	$	4.8	$	59.9	$	49.4		$	20.9		$	4.7
Net Property, Plant and Equipment	—		104.1		—			—			—
Other Noncurrent Assets	128.1		51.8		90.5		(a)	151.4		(b)	145.3		(c)
Total Assets	$	132.9	$	215.8	$	139.9		$	172.3		$	150.0
LIABILITIES AND EQUITY
Current Liabilities	$	21.0	$	59.8	$	75.3		$	36.0		$	28.5
Noncurrent Liabilities	110.6		156.0		60.3			135.1			119.6
Equity	1.3		—		4.3			1.2			1.9
Total Liabilities and Equity	$	132.9	$	215.8	$	139.9		$	172.3		$	150.0

(a)Includes an intercompany item eliminated in consolidation of $10 million.

(b)Includes an intercompany item eliminated in consolidation of $6 million.

(c)Includes an intercompany item eliminated in consolidation of $2 million.

American Electric Power Company, Inc. and Subsidiary Companies
Variable Interest Entities
September 30, 2023
	Other Consolidated VIEs
	AEP Credit		Protected Cell of EIS		Transource Energy
	(in millions)
ASSETS
Current Assets	$	1,259.0	$	202.9	$	32.8
Net Property, Plant and Equipment	—		—		499.8
Other Noncurrent Assets	9.6		0.7		4.0
Total Assets	$	1,268.6	$	203.6	$	536.6
LIABILITIES AND EQUITY
Current Liabilities	$	1,201.3	$	54.1	$	21.3
Noncurrent Liabilities	0.9		84.7		229.4
Equity	66.4		64.8		285.9
Total Liabilities and Equity	$	1,268.6	$	203.6	$	536.6

American Electric Power Company, Inc. and Subsidiary Companies
Variable Interest Entities
December 31, 2022
	Registrant Subsidiaries
	SWEPCo Sabine		I&M DCC Fuel		AEP Texas Transition Funding			AEP Texas Restoration Funding			APCo Appalachian Consumer Rate Relief Funding
	(in millions)
ASSETS
Current Assets	$	108.3	$	90.2	$	27.0		$	21.1		$	13.5
Net Property, Plant and Equipment	7.2		179.1		—			—			—
Other Noncurrent Assets	130.0		94.0		140.9		(a)	168.8		(b)	164.6		(c)
Total Assets	$	245.5	$	363.3	$	167.9		$	189.9		$	178.1
LIABILITIES AND EQUITY
Current Liabilities	$	25.4	$	90.0	$	73.2		$	31.3		$	29.3
Noncurrent Liabilities	219.4		273.3		90.4			157.4			146.9
Equity	0.7		—		4.3			1.2			1.9
Total Liabilities and Equity	$	245.5	$	363.3	$	167.9		$	189.9		$	178.1

(a)Includes an intercompany item eliminated in consolidation of $16 million.

(b)Includes an intercompany item eliminated in consolidation of $7 million.

(c)Includes an intercompany item eliminated in consolidation of $2 million.

American Electric Power Company, Inc. and Subsidiary Companies
Variable Interest Entities
December 31, 2022
	Other Consolidated VIEs
	AEP Credit		Protected Cell of EIS		Transource Energy		Apple Blossom and Black Oak		Santa Rita East		Dry Lake
	(in millions)
ASSETS
Current Assets	$	1,181.0	$	194.5	$	23.5	$	8.3	$	21.3	$	4.0
Net Property, Plant and Equipment	—		—		482.3		216.5		421.6		142.6
Other Noncurrent Assets	9.0		0.3		2.7		13.6		0.1		0.3
Total Assets	$	1,190.0	$	194.8	$	508.5	$	238.4	$	443.0	$	146.9
LIABILITIES AND EQUITY
Current Liabilities	$	1,087.8	$	46.4	$	22.8	$	4.5	$	9.6	$	1.0
Noncurrent Liabilities	0.9		79.1		218.6		5.4		7.3		0.7
Equity	101.3		69.3		267.1		228.5		426.1		145.2
Total Liabilities and Equity	$	1,190.0	$	194.8	$	508.5	$	238.4	$	443.0	$	146.9

XML

Property, Plant and Equipment (Tables)

9 Months Ended

Sep. 30, 2023

Asset Retirement Obligation (ARO)

Company	ARO as of December 31, 2022		Accretion Expense		Liabilities Incurred		Liabilities Settled		Revisions in Cash Flow Estimates		ARO as of September 30, 2023
	(in millions)
AEP (a)(b)(c)(d)(e)(f)	$	2,944.9	$	86.0	$	12.9	$	(98.1)	$	13.8	$	2,959.5
SWEPCo (a)(c)(d)(e)	282.2		10.0		7.1		(37.9)		0.4		261.8

(a)Includes ARO related to ash disposal facilities.

(b)Includes ARO related to nuclear decommissioning costs for the Cook Plant of $2.05 billion and $2 billion as of September 30, 2023 and December 31, 2022, respectively.

(c)Includes ARO related to Sabine and DHLC.

(d)Includes ARO related to asbestos removal.

(e)In 2023, SWEPCo settled $35 million of costs related to closure/reclamation work performed due to the recent retirements of the Pirkey Plant and Dolet Hills Power Station. See “Coal-Fired Generation Plants” section of Note 4 for additional information.

(f)In August 2023, AEP completed the sale of its competitive contracted renewables portfolio to a nonaffiliated party and settled ARO liabilities of $31 million. See “Disposition of the Competitive Contracted Renewables Portfolio” section of Note 6 for additional information.

XML

Revenue from Contracts with Customers (Tables)

9 Months Ended

Sep. 30, 2023

Disaggregated Revenues from Contracts with Customers

	Three Months Ended September 30, 2023
	Vertically Integrated Utilities		Transmission and Distribution Utilities		AEP Transmission Holdco		Generation & Marketing		Corporate and Other		Reconciling Adjustments		AEP Consolidated
	(in millions)
Retail Revenues:
Residential Revenues	$	1,326.7	$	772.5	$	—	$	—	$	—	$	—	$	2,099.2
Commercial Revenues	753.3		387.7		—		—		—		—		1,141.0
Industrial Revenues	699.9		138.9		—		—		—		(0.3)		838.5
Other Retail Revenues	66.6		13.0		—		—		—		—		79.6
Total Retail Revenues	2,846.5		1,312.1		—		—		—		(0.3)		4,158.3
Wholesale and Competitive Retail Revenues:
Generation Revenues	174.3		—		—		31.8		—		(0.3)		205.8
Transmission Revenues (a)	120.6		176.0		466.1		—		—		(425.1)		337.6
Renewable Generation Revenues (b)	—		—		—		19.8		—		(2.5)		17.3
Retail, Trading and Marketing Revenues (c)	—		—		—		510.8		0.8		(36.7)		474.9
Total Wholesale and Competitive Retail Revenues	294.9		176.0		466.1		562.4		0.8		(464.6)		1,035.6
Other Revenues from Contracts with Customers (d)	61.3		58.2		4.8		0.9		55.6		(48.5)		132.3
Total Revenues from Contracts with Customers	3,202.7		1,546.3		470.9		563.3		56.4		(513.4)		5,326.2
Other Revenues:
Alternative Revenue Programs (b) (e)	0.5		(5.0)		5.8		—		—		5.7		7.0
Other Revenues (b) (f)	2.2		2.8		—		3.4		0.8		(0.7)		8.5
Total Other Revenues	2.7		(2.2)		5.8		3.4		0.8		5.0		15.5
Total Revenues	$	3,205.4	$	1,544.1	$	476.7	$	566.7	$	57.2	$	(508.4)	$	5,341.7

(a)Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for AEP Transmission Holdco was $366 million. The remaining affiliated amounts were immaterial.

(b)Amounts include affiliated and nonaffiliated revenues.

(c)Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for Generation & Marketing was $37 million. The remaining affiliated amounts were immaterial.

(d)Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for Corporate and Other was $32 million. The remaining affiliated amounts were immaterial.

(e)Alternative revenue programs in certain jurisdictions include regulatory mechanisms that periodically adjust for over/under collection of related revenues.

(f)Generation & Marketing includes economic hedge activity.

	Three Months Ended September 30, 2022
	Vertically Integrated Utilities		Transmission and Distribution Utilities		AEP Transmission Holdco		Generation & Marketing		Corporate and Other		Reconciling Adjustments		AEP Consolidated
	(in millions)
Retail Revenues:
Residential Revenues	$	1,298.0	$	721.9	$	—	$	—	$	—	$	—	$	2,019.9
Commercial Revenues	725.1		373.0		—		—		—		—		1,098.1
Industrial Revenues	658.5		191.5		—		—		—		(0.3)		849.7
Other Retail Revenues	54.3		15.0		—		—		—		—		69.3
Total Retail Revenues	2,735.9		1,301.4		—		—		—		(0.3)		4,037.0
Wholesale and Competitive Retail Revenues:
Generation Revenues	299.3		—		—		83.7		—		(0.2)		382.8
Transmission Revenues (a)	120.3		162.3		424.9		—		—		(392.7)		314.8
Renewable Generation Revenues (b)	—		—		—		44.3		—		(2.5)		41.8
Retail, Trading and Marketing Revenues	—		—		—		482.9		2.2		0.2		485.3
Total Wholesale and Competitive Retail Revenues	419.6		162.3		424.9		610.9		2.2		(395.2)		1,224.7
Other Revenues from Contracts with Customers (c)	69.7		74.5		(0.3)		1.7		24.3		(31.9)		138.0
Total Revenues from Contracts with Customers	3,225.2		1,538.2		424.6		612.6		26.5		(427.4)		5,399.7
Other Revenues:
Alternative Revenue Programs (b) (d)	0.9		(13.5)		6.3		—		—		4.4		(1.9)
Other Revenues (b) (e)	0.2		5.5		—		122.8		1.8		(2.0)		128.3
Total Other Revenues	1.1		(8.0)		6.3		122.8		1.8		2.4		126.4
Total Revenues	$	3,226.3	$	1,530.2	$	430.9	$	735.4	$	28.3	$	(425.0)	$	5,526.1

(a)Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for AEP Transmission Holdco was $342 million. The remaining affiliated amounts were immaterial.

(b)Amounts include affiliated and nonaffiliated revenues.

(c)Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for Corporate and Other was $18 million. The remaining affiliated amounts were immaterial.

(d)Alternative revenue programs in certain jurisdictions include regulatory mechanisms that periodically adjust for over/under collection of related revenues.

(e)Generation & Marketing includes economic hedge activity.

	Three Months Ended September 30, 2023
	AEP Texas		AEPTCo		APCo		I&M		OPCo		PSO		SWEPCo
	(in millions)
Retail Revenues:
Residential Revenues	$	236.2	$	—	$	397.1	$	230.7	$	536.3	$	310.5	$	286.5
Commercial Revenues	112.4		—		181.3		159.2		275.3		171.9		174.9
Industrial Revenues	35.4		—		197.1		159.1		103.6		114.1		105.5
Other Retail Revenues	9.2		—		26.8		1.3		3.8		33.8		2.4
Total Retail Revenues	393.2		—		802.3		550.3		919.0		630.3		569.3
Wholesale Revenues:
Generation Revenues (a)	—		—		79.4		90.2		—		(4.9)		36.8
Transmission Revenues (b)	154.6		454.7		45.5		10.4		21.4		10.8		42.4
Total Wholesale Revenues	154.6		454.7		124.9		100.6		21.4		5.9		79.2
Other Revenues from Contracts with Customers (c)	8.8		5.0		35.2		26.2		49.2		5.4		6.0
Total Revenues from Contracts with Customers	556.6		459.7		962.4		677.1		989.6		641.6		654.5
Other Revenues:
Alternative Revenue Programs (d) (e)	(2.0)		3.0		(0.7)		(2.9)		(3.1)		2.6		0.3
Other Revenues (e)	—		—		0.1		2.1		3.0		—		—
Total Other Revenues	(2.0)		3.0		(0.6)		(0.8)		(0.1)		2.6		0.3
Total Revenues	$	554.6	$	462.7	$	961.8	$	676.3	$	989.5	$	644.2	$	654.8

(a)Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for APCo was $36 million primarily related to the PPA with KGPCo.

(b)Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for AEPTCo was $363 million, APCo was $22 million and SWEPCo was $17 million. The remaining affiliated amounts were immaterial.

(c)Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for I&M was $18 million primarily related to barging, urea transloading and other transportation services. The remaining affiliated amounts were immaterial.

(d)Alternative revenue programs in certain jurisdictions include regulatory mechanisms that periodically adjust for over/under collection of related revenues.

(e)Amounts include affiliated and nonaffiliated revenues.

	Three Months Ended September 30, 2022
	AEP Texas		AEPTCo		APCo		I&M		OPCo		PSO		SWEPCo
	(in millions)
Retail Revenues:
Residential Revenues	$	204.0	$	—	$	360.5	$	238.6	$	517.9	$	299.6	$	285.5
Commercial Revenues	107.1		—		161.1		154.3		266.1		153.4		182.3
Industrial Revenues	35.4		—		163.3		155.6		156.1		98.9		108.3
Other Retail Revenues	11.5		—		20.6		1.2		3.5		30.1		0.6
Total Retail Revenues	358.0		—		705.5		549.7		943.6		582.0		576.7
Wholesale Revenues:
Generation Revenues (a)	—		—		107.9		126.3		—		9.4		87.6
Transmission Revenues (b)	140.8		411.7		41.5		8.8		21.5		10.2		42.3
Total Wholesale Revenues	140.8		411.7		149.4		135.1		21.5		19.6		129.9
Other Revenues from Contracts with Customers (c)	9.5		(0.3)		33.7		30.6		64.8		6.4		7.6
Total Revenues from Contracts with Customers	508.3		411.4		888.6		715.4		1,029.9		608.0		714.2
Other Revenues:
Alternative Revenue Programs (d) (e)	0.6		7.1		—		—		(14.1)		0.2		3.3
Other Revenues (e)	—		—		0.3		—		5.5		—		—
Total Other Revenues	0.6		7.1		0.3		—		(8.6)		0.2		3.3
Total Revenues	$	508.9	$	418.5	$	888.9	$	715.4	$	1,021.3	$	608.2	$	717.5

(a)Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for APCo was $44 million primarily related to the PPA with KGPCo.

(b)Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for AEPTCo was $339 million. The remaining affiliated amounts were immaterial.

(c)Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for I&M was $15 million primarily related to barging, urea transloading and other transportation services. The remaining affiliated amounts were immaterial.

(d)Alternative revenue programs in certain jurisdictions include regulatory mechanisms that periodically adjust for over/under collection of related revenues.

(e)Amounts include affiliated and nonaffiliated revenues.

	Nine Months Ended September 30, 2023
	Vertically Integrated Utilities		Transmission and Distribution Utilities		AEP Transmission Holdco		Generation & Marketing		Corporate and Other		Reconciling Adjustments		AEP Consolidated
	(in millions)
Retail Revenues:
Residential Revenues	$	3,459.1	$	2,003.4	$	—	$	—	$	—	$	—	$	5,462.5
Commercial Revenues	2,029.4		1,121.9		—		—		—		—		3,151.3
Industrial Revenues (a)	2,069.1		503.9		—		—		—		(0.6)		2,572.4
Other Retail Revenues	182.3		37.4		—		—		—		—		219.7
Total Retail Revenues	7,739.9		3,666.6		—		—		—		(0.6)		11,405.9
Wholesale and Competitive Retail Revenues:
Generation Revenues	498.5		—		—		83.8		—		(0.2)		582.1
Transmission Revenues (b)	348.8		524.3		1,372.0		—		—		(1,229.7)		1,015.4
Renewable Generation Revenues (a)	—		—		—		74.2		—		(5.7)		68.5
Retail, Trading and Marketing Revenues (c)	—		—		—		1,332.2		1.7		(46.7)		1,287.2
Total Wholesale and Competitive Retail Revenues	847.3		524.3		1,372.0		1,490.2		1.7		(1,282.3)		2,953.2
Other Revenues from Contracts with Customers (d)	155.8		157.1		12.7		7.7		113.6		(132.1)		314.8
Total Revenues from Contracts with Customers	8,743.0		4,348.0		1,384.7		1,497.9		115.3		(1,415.0)		14,673.9
Other Revenues:
Alternative Revenue Programs (a) (e)	(7.5)		(19.5)		6.1		—		—		2.3		(18.6)
Other Revenues (a) (f)	2.2		20.0		—		(272.8)		4.0		(3.6)		(250.2)
Total Other Revenues	(5.3)		0.5		6.1		(272.8)		4.0		(1.3)		(268.8)
Total Revenues	$	8,737.7	$	4,348.5	$	1,390.8	$	1,225.1	$	119.3	$	(1,416.3)	$	14,405.1

(a)Amounts include affiliated and nonaffiliated revenues.

(b)Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for AEP Transmission Holdco was $1.1 billion. The affiliated revenue for Vertically Integrated Utilities was $125 million. The remaining affiliated amounts were immaterial.

(c)Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for Generation & Marketing was $47 million. The remaining affiliated amounts were immaterial.

(d)Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for Corporate and Other was $87 million. The remaining affiliated amounts were immaterial.

(e)Alternative revenue programs in certain jurisdictions include regulatory mechanisms that periodically adjust for over/under collection of related revenues.

(f)Generation & Marketing includes economic hedge activity.

	Nine Months Ended September 30, 2022
	Vertically Integrated Utilities		Transmission and Distribution Utilities		AEP Transmission Holdco		Generation & Marketing		Corporate and Other		Reconciling Adjustments		AEP Consolidated
	(in millions)
Retail Revenues:
Residential Revenues	$	3,428.1	$	1,884.1	$	—	$	—	$	—	$	—	$	5,312.2
Commercial Revenues	1,922.8		994.4		—		—		—		—		2,917.2
Industrial Revenues (a)	1,863.3		487.3		—		—		—		(0.7)		2,349.9
Other Retail Revenues	154.6		39.4		—		—		—		—		194.0
Total Retail Revenues	7,368.8		3,405.2		—		—		—		(0.7)		10,773.3
Wholesale and Competitive Retail Revenues:
Generation Revenues (a)	674.8		—		—		207.0		—		(0.1)		881.7
Transmission Revenues (b)	334.4		482.1		1,261.0		—		—		(1,086.5)		991.0
Renewable Generation Revenues (a)	—		—		—		104.9		—		(6.2)		98.7
Retail, Trading and Marketing Revenues (c)	—		—		—		1,280.0		6.7		(11.1)		1,275.6
Total Wholesale and Competitive Retail Revenues	1,009.2		482.1		1,261.0		1,591.9		6.7		(1,103.9)		3,247.0
Other Revenues from Contracts with Customers (d)	180.5		194.2		(0.3)		11.9		59.1		(71.6)		373.8
Total Revenues from Contracts with Customers	8,558.5		4,081.5		1,260.7		1,603.8		65.8		(1,176.2)		14,394.1
Other Revenues:
Alternative Revenue Programs (a) (e)	3.4		(21.5)		(39.6)		—		—		(7.4)		(65.1)
Other Revenues (a) (f)	0.3		18.6		—		410.5		6.9		(6.9)		429.4
Total Other Revenues	3.7		(2.9)		(39.6)		410.5		6.9		(14.3)		364.3
Total Revenues	$	8,562.2	$	4,078.6	$	1,221.1	$	2,014.3	$	72.7	$	(1,190.5)	$	14,758.4

(a)Amounts include affiliated and nonaffiliated revenues.

(b)Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for AEP Transmission Holdco was $1 billion. The affiliated revenue for Vertically Integrated Utilities was $120 million. The remaining affiliated amounts were immaterial.

(c)Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for Generation & Marketing was $11 million. The remaining affiliated amounts were immaterial.

(d)Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for Corporate and Other was $36 million. The remaining affiliated amounts were immaterial.

(e)Alternative revenue programs in certain jurisdictions include regulatory mechanisms that periodically adjust for over/under collection of related revenues.

(f)Generation & Marketing includes economic hedge activity.

	Nine Months Ended September 30, 2023
	AEP Texas		AEPTCo		APCo		I&M		OPCo		PSO		SWEPCo
	(in millions)
Retail Revenues:
Residential Revenues	$	511.8	$	—	$	1,192.4	$	655.5	$	1,491.6	$	667.9	$	647.5
Commercial Revenues	310.3		—		516.2		439.5		811.6		412.7		472.2
Industrial Revenues (a)	109.9		—		575.4		467.6		394.0		320.2		320.3
Other Retail Revenues	26.2		—		78.2		3.8		11.2		86.3		7.6
Total Retail Revenues	958.2		—		2,362.2		1,566.4		2,708.4		1,487.1		1,447.6
Wholesale Revenues:
Generation Revenues (b)	—		—		223.8		257.7		—		0.3		120.3
Transmission Revenues (c)	464.0		1,338.1		130.8		28.1		60.3		32.0		123.6
Total Wholesale Revenues	464.0		1,338.1		354.6		285.8		60.3		32.3		243.9
Other Revenues from Contracts with Customers (d)	29.2		12.8		60.0		92.6		127.9		14.9		20.9
Total Revenues from Contracts with Customers	1,451.4		1,350.9		2,776.8		1,944.8		2,896.6		1,534.3		1,712.4
Other Revenues:
Alternative Revenue Program (a) (e)	(6.1)		(1.7)		(0.9)		(8.4)		(13.5)		1.6		(3.9)
Other Revenues (a)	—		—		0.1		2.1		20.1		—		—
Total Other Revenues	(6.1)		(1.7)		(0.8)		(6.3)		6.6		1.6		(3.9)
Total Revenues	$	1,445.3	$	1,349.2	$	2,776.0	$	1,938.5	$	2,903.2	$	1,535.9	$	1,708.5

(a)Amounts include affiliated and nonaffiliated revenues.

(b)Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for APCo was $121 million primarily relating to the PPA with KGPCo. The remaining affiliated amounts were immaterial.

(c)Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for AEPTCo was $1.1 billion, APCo was $64 million and SWEPCo was $43 million. The remaining affiliated amounts were immaterial.

(d)Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for I&M was $52 million primarily relating to barging, urea transloading and other transportation services. The remaining affiliated amounts were immaterial.

(e)Alternative revenue programs in certain jurisdictions include regulatory mechanisms that periodically adjust for over/under collection of related revenues.

	Nine Months Ended September 30, 2022
	AEP Texas		AEPTCo		APCo		I&M		OPCo		PSO		SWEPCo
	(in millions)
Retail Revenues:
Residential Revenues	$	520.8	$	—	$	1,131.7	$	665.6	$	1,363.3	$	650.7	$	650.0
Commercial Revenues	312.6		—		467.6		419.5		681.9		372.1		458.8
Industrial Revenues (a)	102.6		—		479.0		452.1		384.8		270.0		290.1
Other Retail Revenues	29.2		—		61.4		3.7		10.2		77.1		7.4
Total Retail Revenues	965.2		—		2,139.7		1,540.9		2,440.2		1,369.9		1,406.3
Wholesale Revenues:
Generation Revenues (b)	—		—		227.6		310.9		—		19.2		206.2
Transmission Revenues (c)	417.7		1,218.1		123.4		26.3		64.4		28.9		116.8
Total Wholesale Revenues	417.7		1,218.1		351.0		337.2		64.4		48.1		323.0
Other Revenues from Contracts with Customers (d)	24.4		(0.4)		78.6		86.3		169.6		21.4		18.9
Total Revenues from Contracts with Customers	1,407.3		1,217.7		2,569.3		1,964.4		2,674.2		1,439.4		1,748.2
Other Revenues:
Alternative Revenue Program (a) (e)	(2.9)		(34.4)		0.1		7.3		(18.6)		(0.7)		0.7
Other Revenues (a)	—		—		0.4		(0.1)		18.6		—		—
Total Other Revenues	(2.9)		(34.4)		0.5		7.2		—		(0.7)		0.7
Total Revenues	$	1,404.4	$	1,183.3	$	2,569.8	$	1,971.6	$	2,674.2	$	1,438.7	$	1,748.9

(a)Amounts include affiliated and nonaffiliated revenues.

(b)Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for APCo was $122 million primarily relating to the PPA with KGPCo.

(c)Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for AEPTCo was $992 million. The remaining affiliated amounts were immaterial.

(d)Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for I&M was $44 million primarily relating to barging, urea transloading and other transportation services. The remaining affiliated amounts were immaterial.

(e)Alternative revenue programs in certain jurisdictions include regulatory mechanisms that periodically adjust for over/under collection of related revenues.

Fixed Performance Obligations

Company	2023		2024-2025		2026-2027		After 2027		Total
	(in millions)
AEP	$	22.6	$	166.2	$	141.2	$	35.0	$	365.0
APCo	4.0		32.2		26.6		11.6		74.4
I&M	1.1		8.8		8.8		4.5		23.2

Affiliated Accounts Receivable Contracts with Customers

Company	September 30, 2023		December 31, 2022
	(in millions)
AEP Texas	$	0.1	$	0.1
AEPTCo	122.5		113.8
APCo	69.3		64.5
I&M	50.1		75.3
OPCo	67.3		49.9
PSO	13.8		18.8
SWEPCo	23.7		19.1

XML

Significant Accounting Matters (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022	Dec. 31, 2021
Amounts Attributable to AEP Common Shareholders
Earnings Attributable to Common Shareholders		$ 953,700	$ 683,700	$ 1,871,900	$ 1,922,900
Weighted Average Number of Basic AEP Common Shares Outstanding		520,459,880	513,730,196	516,528,239	511,162,723
Total Basic Earnings Per Share Attributable to AEP Common Shareholders		$ 1.83	$ 1.33	$ 3.62	$ 3.76
Weighted Average Dilutive Effect of:
Weighted Average Number of Diluted AEP Common Shares Outstanding		521,444,125	515,315,994	517,784,726	512,714,006
Total Diluted Earnings Per Share Attributable to AEP Common Shareholders		$ 1.83	$ 1.33	$ 3.62	$ 3.75
Cash, Cash Equivalents and Restricted Cash
Cash and Cash Equivalents		$ 353,300		$ 353,300		$ 509,400
Restricted Cash		53,800		53,800		47,100
Total Cash, Cash Equivalents and Restricted Cash		407,100	$ 577,300	407,100	$ 577,300	556,500	$ 451,400
Proceeds from Issuance of Debt	[1]			4,064,000
Securities Received as Collateral		93,000		93,000		481,000
Cash Paid for Interest, Net of Capitalized Amounts				1,148,700	856,800
Net Cash Paid (Received) for Income Taxes				26,700	104,100
Noncash Acquisitions Under Finance Leases				38,500	22,300
Construction Expenditures Included in Noncurrent Liabilities as of September 30,				975,000	985,800
Acquisition Of Nuclear Fuel Included In Current Liabilities				9,500	8,500
Competitive Contracted Renewable Portfolio
Cash, Cash Equivalents and Restricted Cash
Noncash or Part Noncash Divestiture, Amount of Consideration Received				74,700	0
AEP Texas Inc. [Member]
Cash, Cash Equivalents and Restricted Cash
Cash and Cash Equivalents		100		100		100
Restricted Cash		46,900		46,900		32,700
Total Cash, Cash Equivalents and Restricted Cash		47,000	47,800	47,000	47,800	32,800	30,500
Cash Paid for Interest, Net of Capitalized Amounts				135,900	121,100
Net Cash Paid (Received) for Income Taxes				4,300	10,000
AEP Transmission Co [Member]
Cash, Cash Equivalents and Restricted Cash
Cash and Cash Equivalents		0	0	0	0	0	0
Cash Paid for Interest, Net of Capitalized Amounts				116,900	88,600
Net Cash Paid (Received) for Income Taxes				55,000	53,200
Appalachian Power Co [Member]
Cash, Cash Equivalents and Restricted Cash
Cash and Cash Equivalents		4,500		4,500		7,500
Restricted Cash		6,900		6,900		14,400
Total Cash, Cash Equivalents and Restricted Cash		11,400	14,100	11,400	14,100	21,900	20,100
Cash Paid for Interest, Net of Capitalized Amounts				166,600	128,300
Net Cash Paid (Received) for Income Taxes				40,300	14,200
Indiana Michigan Power Co [Member]
Cash, Cash Equivalents and Restricted Cash
Cash and Cash Equivalents		2,700	25,800	2,700	25,800	4,200	1,300
Cash Paid for Interest, Net of Capitalized Amounts				100,100	101,600
Net Cash Paid (Received) for Income Taxes				36,200	(4,100)
Acquisition Of Nuclear Fuel Included In Current Liabilities				9,500	8,500
Ohio Power Co [Member]
Cash, Cash Equivalents and Restricted Cash
Cash and Cash Equivalents		6,800		6,800		9,600
Total Cash, Cash Equivalents and Restricted Cash		6,800	10,200	6,800	10,200	9,600	3,000
Cash Paid for Interest, Net of Capitalized Amounts				76,500	75,800
Net Cash Paid (Received) for Income Taxes				16,000	24,200
Public Service Co Of Oklahoma [Member]
Cash, Cash Equivalents and Restricted Cash
Cash and Cash Equivalents		3,700	5,500	3,700	5,500	4,000	1,300
Cash Paid for Interest, Net of Capitalized Amounts				67,400	63,100
Net Cash Paid (Received) for Income Taxes				(1,600)	21,900
Southwestern Electric Power Co [Member]
Amounts Attributable to AEP Common Shareholders
Earnings Attributable to Common Shareholders		157,500	139,400	279,100	260,200
Cash, Cash Equivalents and Restricted Cash
Cash and Cash Equivalents		$ 3,600	$ 84,400	3,600	84,400	$ 88,400	$ 51,200
Cash Paid for Interest, Net of Capitalized Amounts				89,800	102,100
Net Cash Paid (Received) for Income Taxes				$ (23,300)	$ 34,700
Restricted Stock Units and Performance Share Units [Member]
Weighted Average Dilutive Effect of:
Weighted Average Dilutive Effect of Shares		900,000	1,600,000	1,300,000	1,500,000
Dilutive Securities, Effect on Basic Earnings Per Share		$ 0	$ 0	$ 0	$ (0.01)

[1] Amounts indicated on the statements of cash flows are net of issuance costs and premium or discount and will not tie to the issuance amounts.

XML

Comprehensive Income (Details) - USD ($) $ in Millions		3 Months Ended						9 Months Ended
		Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2023	Sep. 30, 2022
Changes in Accumulated Other Comprehensive Income (Loss) by Component
Beginning Balance in AOCI		$ (36.4)		$ 83.7	$ 551.4		$ 184.8	$ 83.7	$ 184.8
Change in Fair Value Recognized in AOCI		12.4			101.7			(177.7)	646.0
Commodity
Generation & Marketing Revenues		5,341.7			5,526.1			14,405.1	14,758.4
Interest Rate
Interest Expense		470.3			360.7			1,346.0	1,001.7
Amortization Of Pension And Other Postretirement Benefit Plans
Reclassification from AOCI, before Income Tax (Expense) Benefit		(20.9)			(225.5)			46.6	(439.1)
Income Tax (Expense) Benefit		64.2			(16.1)			103.2	90.7
Reclassification from AOCI, Net of Income Tax (Expense) Benefit		(16.5)			(178.2)			36.8	(346.9)
Reclassifications of KPCo Pension and OPEB Regulatory Assets, Net of Tax		0.0			0.0			16.7	0.0
Net Current Period Other Comprehensive Income (Loss)		(4.1)	$ 31.7	(151.8)	(76.5)	$ 120.8	245.8	(124.2)	290.1
Ending Balance in AOCI		(40.5)	(36.4)		474.9	551.4		(40.5)	474.9
Reclassification of KPCo Pension and OPEB Regulatory Assets from AOCI
Amortization Of Pension And Other Postretirement Benefit Plans
Income Tax (Expense) Benefit								4.4
Reclassifications of KPCo Pension and OPEB Regulatory Assets from AOCI, before Income Tax (Expense) Benefit								21.1
Reclassifications of KPCo Pension and OPEB Regulatory Assets, Net of Tax								16.7
Cash Flow Hedges [Member] | Commodity [Member]
Changes in Accumulated Other Comprehensive Income (Loss) by Component
Beginning Balance in AOCI		93.5		223.5	533.6		163.7	223.5	163.7
Change in Fair Value Recognized in AOCI		19.3			94.3			(170.1)	629.8
Amortization Of Pension And Other Postretirement Benefit Plans
Reclassification from AOCI, before Income Tax (Expense) Benefit		(15.6)			(222.4)			59.7	(432.1)
Reclassification from AOCI, Net of Income Tax (Expense) Benefit		(12.2)			(175.8)			47.2	(341.4)
Net Current Period Other Comprehensive Income (Loss)		7.1			(81.5)			(122.9)	288.4
Ending Balance in AOCI		100.6	93.5		452.1	533.6		100.6	452.1
Cash Flow Hedges [Member] | Commodity [Member] | Reclassification of KPCo Pension and OPEB Regulatory Assets from AOCI
Amortization Of Pension And Other Postretirement Benefit Plans
Income Tax (Expense) Benefit								0.0
Reclassifications of KPCo Pension and OPEB Regulatory Assets from AOCI, before Income Tax (Expense) Benefit								0.0
Reclassifications of KPCo Pension and OPEB Regulatory Assets, Net of Tax								0.0
Cash Flow Hedges [Member] | Interest Rate [Member]
Changes in Accumulated Other Comprehensive Income (Loss) by Component
Beginning Balance in AOCI		12.7		0.3	(10.8)		(21.3)	0.3	(21.3)
Change in Fair Value Recognized in AOCI		(6.9)			7.4			5.3	16.2
Amortization Of Pension And Other Postretirement Benefit Plans
Reclassification from AOCI, before Income Tax (Expense) Benefit		(1.3)			0.9			(1.1)	3.1
Reclassification from AOCI, Net of Income Tax (Expense) Benefit		(1.1)			0.8			(0.9)	2.5
Net Current Period Other Comprehensive Income (Loss)		(8.0)			8.2			4.4	18.7
Ending Balance in AOCI		4.7	12.7		(2.6)	(10.8)		4.7	(2.6)
Cash Flow Hedges [Member] | Interest Rate [Member] | Reclassification of KPCo Pension and OPEB Regulatory Assets from AOCI
Amortization Of Pension And Other Postretirement Benefit Plans
Income Tax (Expense) Benefit								0.0
Reclassifications of KPCo Pension and OPEB Regulatory Assets from AOCI, before Income Tax (Expense) Benefit								0.0
Reclassifications of KPCo Pension and OPEB Regulatory Assets, Net of Tax								0.0
Pension and OPEB [Member]
Changes in Accumulated Other Comprehensive Income (Loss) by Component
Beginning Balance in AOCI		(142.6)		$ (140.1)	28.6		$ 42.4	(140.1)	42.4
Change in Fair Value Recognized in AOCI		0.0			0.0			(12.9)	0.0
Amortization Of Pension And Other Postretirement Benefit Plans
Reclassification from AOCI, before Income Tax (Expense) Benefit		(4.0)			(4.0)			(12.0)	(10.1)
Reclassification from AOCI, Net of Income Tax (Expense) Benefit		(3.2)			(3.2)			(9.5)	(8.0)
Net Current Period Other Comprehensive Income (Loss)		(3.2)			(3.2)			(5.7)	(17.0)
Ending Balance in AOCI		(145.8)	$ (142.6)		25.4	$ 28.6		(145.8)	25.4
Pension and OPEB [Member] | Reclassification of KPCo Pension and OPEB Regulatory Assets from AOCI
Amortization Of Pension And Other Postretirement Benefit Plans
Income Tax (Expense) Benefit								4.4
Reclassifications of KPCo Pension and OPEB Regulatory Assets from AOCI, before Income Tax (Expense) Benefit								21.1
Reclassifications of KPCo Pension and OPEB Regulatory Assets, Net of Tax								16.7
Generation and Marketing [Member]
Commodity
Generation & Marketing Revenues		527.5			733.1			1,172.6	1,997.0
Reclassifications To Accumulated Other Comprehensive Income [Member]
Amortization Of Pension And Other Postretirement Benefit Plans
Income Tax (Expense) Benefit									(2.4)
Reclassifications to AOCI, Current Period, before Tax, Attributable to Parent									(11.4)
Reclassifications of KPCo Pension and OPEB Regulatory Assets, Net of Tax									(9.0)
Reclassifications To Accumulated Other Comprehensive Income [Member] | Cash Flow Hedges [Member] | Commodity [Member]
Amortization Of Pension And Other Postretirement Benefit Plans
Income Tax (Expense) Benefit									0.0
Reclassifications to AOCI, Current Period, before Tax, Attributable to Parent									0.0
Reclassifications of KPCo Pension and OPEB Regulatory Assets, Net of Tax									0.0
Reclassifications To Accumulated Other Comprehensive Income [Member] | Cash Flow Hedges [Member] | Interest Rate [Member]
Amortization Of Pension And Other Postretirement Benefit Plans
Income Tax (Expense) Benefit									0.0
Reclassifications to AOCI, Current Period, before Tax, Attributable to Parent									0.0
Reclassifications of KPCo Pension and OPEB Regulatory Assets, Net of Tax									0.0
Reclassifications To Accumulated Other Comprehensive Income [Member] | Pension and OPEB [Member] | Pension Costs
Amortization Of Pension And Other Postretirement Benefit Plans
Income Tax (Expense) Benefit									(2.4)
Reclassifications to AOCI, Current Period, before Tax, Attributable to Parent									(11.4)
Reclassifications of KPCo Pension and OPEB Regulatory Assets, Net of Tax									(9.0)
Reclassifications from Accumulated Other Comprehensive Income [Member]
Interest Rate
Interest Expense	[1]	(1.3)			0.9			(1.1)	3.1
Amortization Of Pension And Other Postretirement Benefit Plans
Amortization of Prior Service Cost (Credit)		(5.3)			(6.2)			(15.9)	(16.5)
Amortization of Actuarial (Gains) Losses		1.3			2.2			3.9	6.4
Income Tax (Expense) Benefit		(4.4)			(47.3)			9.8	(92.2)
Reclassifications from Accumulated Other Comprehensive Income [Member] | Cash Flow Hedges [Member] | Commodity [Member]
Interest Rate
Interest Expense	[1]	0.0			0.0			0.0	0.0
Amortization Of Pension And Other Postretirement Benefit Plans
Amortization of Prior Service Cost (Credit)		0.0			0.0			0.0	0.0
Amortization of Actuarial (Gains) Losses		0.0			0.0			0.0	0.0
Income Tax (Expense) Benefit		(3.4)			(46.6)			12.5	(90.7)
Reclassifications from Accumulated Other Comprehensive Income [Member] | Cash Flow Hedges [Member] | Interest Rate [Member]
Interest Rate
Interest Expense	[1]	(1.3)			0.9			(1.1)	3.1
Amortization Of Pension And Other Postretirement Benefit Plans
Amortization of Prior Service Cost (Credit)		0.0			0.0			0.0	0.0
Amortization of Actuarial (Gains) Losses		0.0			0.0			0.0	0.0
Income Tax (Expense) Benefit		(0.2)			0.1			(0.2)	0.6
Reclassifications from Accumulated Other Comprehensive Income [Member] | Pension and OPEB [Member]
Interest Rate
Interest Expense	[1]	0.0			0.0			0.0	0.0
Amortization Of Pension And Other Postretirement Benefit Plans
Amortization of Prior Service Cost (Credit)		(5.3)			(6.2)			(15.9)	(16.5)
Amortization of Actuarial (Gains) Losses		1.3			2.2			3.9	6.4
Income Tax (Expense) Benefit		(0.8)			(0.8)			(2.5)	(2.1)
Reclassifications from Accumulated Other Comprehensive Income [Member] | Generation and Marketing [Member]
Commodity
Generation & Marketing Revenues	[1]				0.2				0.2
Reclassifications from Accumulated Other Comprehensive Income [Member] | Generation and Marketing [Member] | Cash Flow Hedges [Member] | Commodity [Member]
Commodity
Generation & Marketing Revenues	[1]				0.2				0.2
Reclassifications from Accumulated Other Comprehensive Income [Member] | Generation and Marketing [Member] | Cash Flow Hedges [Member] | Interest Rate [Member]
Commodity
Generation & Marketing Revenues	[1]				0.0				0.0
Reclassifications from Accumulated Other Comprehensive Income [Member] | Generation and Marketing [Member] | Pension and OPEB [Member]
Commodity
Generation & Marketing Revenues	[1]				0.0				0.0
Reclassifications from Accumulated Other Comprehensive Income [Member] | Purchased Electricity, Fuel and Other Consumables Used for Electric Generation [Member]
Commodity
Purchased Electricity, Fuel and Other Consumables Used for Electric Generation	[1]	(15.6)			(222.6)			59.7	(432.3)
Reclassifications from Accumulated Other Comprehensive Income [Member] | Purchased Electricity, Fuel and Other Consumables Used for Electric Generation [Member] | Cash Flow Hedges [Member] | Commodity [Member]
Commodity
Purchased Electricity, Fuel and Other Consumables Used for Electric Generation	[1]	(15.6)			(222.6)			59.7	(432.3)
Reclassifications from Accumulated Other Comprehensive Income [Member] | Purchased Electricity, Fuel and Other Consumables Used for Electric Generation [Member] | Cash Flow Hedges [Member] | Interest Rate [Member]
Commodity
Purchased Electricity, Fuel and Other Consumables Used for Electric Generation	[1]	0.0			0.0			0.0	0.0
Reclassifications from Accumulated Other Comprehensive Income [Member] | Purchased Electricity, Fuel and Other Consumables Used for Electric Generation [Member] | Pension and OPEB [Member]
Commodity
Purchased Electricity, Fuel and Other Consumables Used for Electric Generation	[1]	$ 0.0			$ 0.0			$ 0.0	$ 0.0

[1] Amounts reclassified to the referenced line item on the statements of income.

XML

Rate Matters Regulated Operations (Details) - USD ($) $ in Millions		9 Months Ended
		Sep. 30, 2023		Sep. 30, 2022	Dec. 31, 2022
Public Utilities, General Disclosures [Line Items]
Net Investment		$ 75,821.1			$ 73,339.1
Regulatory Assets, Noncurrent		4,607.3			4,762.0
Other Asset Impairment Charges		0.0		$ 24.9
Regulatory Assets, Current		1,087.6			1,310.0
AEP Texas Inc. [Member]
Public Utilities, General Disclosures [Line Items]
Net Investment		12,590.8			11,681.6
Regulatory Assets, Noncurrent		307.7			298.3
AEP Transmission Co [Member]
Public Utilities, General Disclosures [Line Items]
Net Investment		14,318.9			13,339.9
Regulatory Assets, Noncurrent		4.4			7.2
Appalachian Power Co [Member]
Public Utilities, General Disclosures [Line Items]
Net Investment		12,825.1			12,379.2
Regulatory Assets, Noncurrent		978.8			1,058.6
Other Asset Impairment Charges		0.0		$ 24.9
Regulatory Assets, Current		442.0			473.1
Indiana Michigan Power Co [Member]
Public Utilities, General Disclosures [Line Items]
Net Investment		7,535.7			7,411.5
Regulatory Assets, Noncurrent		377.7			459.6
Regulatory Assets, Current		13.3			47.1
Ohio Power Co [Member]
Public Utilities, General Disclosures [Line Items]
Net Investment		9,160.0			8,609.3
Regulatory Assets, Noncurrent		413.2			327.3
Public Service Co Of Oklahoma [Member]
Public Utilities, General Disclosures [Line Items]
Net Investment		6,025.1			5,626.5
Regulatory Assets, Noncurrent		477.2			653.7
Regulatory Assets, Current		168.2			178.7
Public Service Co Of Oklahoma [Member] | Northeastern Plant, Unit 3 | Generating Units Probable of Abandonment [Member]
Public Utilities, General Disclosures [Line Items]
Net Investment		112.5
Accelerated Depreciation Regulatory Asset		159.5
Cost of Removal Regulatory Liability	[1]	$ 20.4
Expected Retirement Date	[2]	2026
Depreciation	[3]	$ 15.0
Southwestern Electric Power Co [Member]
Public Utilities, General Disclosures [Line Items]
Net Investment		8,562.5			8,262.2
Regulatory Assets, Noncurrent		1,116.9			1,042.4
Net Under-Recovered Fuel Costs		91.0
Regulatory Assets, Current		184.4			353.0
Southwestern Electric Power Co [Member] | Dolet Hills Power Station and Related Fuel Operations
Public Utilities, General Disclosures [Line Items]
Share of Net Investment in Dolet Hills Power Station		105.0
Southwestern Electric Power Co [Member] | Dolet Hills Power Station and Related Fuel Operations | Arkansas
Public Utilities, General Disclosures [Line Items]
Recovery of 2021 Dolet Hills Fuel Costs		20.0
Southwestern Electric Power Co [Member] | Dolet Hills Power Station and Related Fuel Operations | Louisiana Jurisdiction [Member]
Public Utilities, General Disclosures [Line Items]
Recovery of 2021 Dolet Hills Fuel Costs		20.0
Approved Deferral of Dolet Hills Fuel Costs		35.0
Recommended Disallowance from Staff or Intervenors		72.0
Southwestern Electric Power Co [Member] | Dolet Hills Power Station and Related Fuel Operations | Texas
Public Utilities, General Disclosures [Line Items]
Oxbow Mine Related Costs Recovery Request		48.0
Southwestern Electric Power Co [Member] | Pirkey Power Plant and Related Fuel Operations
Public Utilities, General Disclosures [Line Items]
Share of Net Investment in Pirkey Power Plant		180.0
Southwestern Electric Power Co [Member] | Pirkey Power Plant and Related Fuel Operations | Texas
Public Utilities, General Disclosures [Line Items]
Oxbow Mine Related Costs Recovery Request		33.0
Southwestern Electric Power Co [Member] | Pirkey Generating Station (Unit No. 1) | Texas
Public Utilities, General Disclosures [Line Items]
Net Investment		66.0
Southwestern Electric Power Co [Member] | Welsh Plant Unit 1 and 3 | Generating Units Probable of Abandonment [Member]
Public Utilities, General Disclosures [Line Items]
Net Investment		368.8
Accelerated Depreciation Regulatory Asset		115.5
Cost of Removal Regulatory Liability	[4]	$ 58.0
Expected Retirement Date	[5],[6]	2028
Depreciation	[3]	$ 38.6
Southwestern Electric Power Co [Member] | Dolet Hills Power Station | Arkansas
Public Utilities, General Disclosures [Line Items]
Other Asset Impairment Charges		2.0
Southwestern Electric Power Co [Member] | Dolet Hills Power Station | Texas
Public Utilities, General Disclosures [Line Items]
Other Asset Impairment Charges		12.0
Regulatory Assets Pending Final Regulatory Approval [Member]
Public Utilities, General Disclosures [Line Items]
Regulatory Assets, Noncurrent		886.3			919.3
Regulatory Assets Pending Final Regulatory Approval [Member] | AEP Texas Inc. [Member]
Public Utilities, General Disclosures [Line Items]
Regulatory Assets, Noncurrent		61.5			67.0
Regulatory Assets Pending Final Regulatory Approval [Member] | Appalachian Power Co [Member]
Public Utilities, General Disclosures [Line Items]
Regulatory Assets, Noncurrent		148.4			144.5
Regulatory Assets Pending Final Regulatory Approval [Member] | Indiana Michigan Power Co [Member]
Public Utilities, General Disclosures [Line Items]
Regulatory Assets, Noncurrent		32.3			23.7
Regulatory Assets Pending Final Regulatory Approval [Member] | Ohio Power Co [Member]
Public Utilities, General Disclosures [Line Items]
Regulatory Assets, Noncurrent		21.2			33.8
Regulatory Assets Pending Final Regulatory Approval [Member] | Public Service Co Of Oklahoma [Member]
Public Utilities, General Disclosures [Line Items]
Regulatory Assets, Noncurrent		93.0			25.6
Regulatory Assets Pending Final Regulatory Approval [Member] | Southwestern Electric Power Co [Member]
Public Utilities, General Disclosures [Line Items]
Regulatory Assets, Noncurrent		446.5			547.3
Regulatory Assets Currently Earning Return [Member] | Regulatory Assets Pending Final Regulatory Approval [Member] | Other Regulatory Assets Not Yet Being Recovered [Member]
Public Utilities, General Disclosures [Line Items]
Regulatory Assets, Noncurrent		21.0			19.3
Regulatory Assets Currently Earning Return [Member] | Regulatory Assets Pending Final Regulatory Approval [Member] | February 2021 Severe Storm Fuel Costs
Public Utilities, General Disclosures [Line Items]
Regulatory Assets, Noncurrent	[7]	101.4			121.7
Regulatory Assets Currently Earning Return [Member] | Regulatory Assets Pending Final Regulatory Approval [Member] | Pirkey Power Plant Accelerated Depreciation
Public Utilities, General Disclosures [Line Items]
Regulatory Assets, Noncurrent		113.0			116.5
Regulatory Assets Currently Earning Return [Member] | Regulatory Assets Pending Final Regulatory Approval [Member] | Welsh Unit 1 and 3 Accelerated Depreciation
Public Utilities, General Disclosures [Line Items]
Regulatory Assets, Noncurrent		115.5			85.6
Regulatory Assets Currently Earning Return [Member] | Regulatory Assets Pending Final Regulatory Approval [Member] | Dolet Hills Power Station Fuel Costs - Louisiana
Public Utilities, General Disclosures [Line Items]
Regulatory Assets, Noncurrent		34.7			32.0
Regulatory Assets Currently Earning Return [Member] | Regulatory Assets Pending Final Regulatory Approval [Member] | Mobile Generation Lease Payments
Public Utilities, General Disclosures [Line Items]
Regulatory Assets, Noncurrent	[8]	0.0			17.6
Regulatory Assets Currently Earning Return [Member] | Regulatory Assets Pending Final Regulatory Approval [Member] | AEP Texas Inc. [Member] | Mobile Generation Lease Payments
Public Utilities, General Disclosures [Line Items]
Regulatory Assets, Noncurrent	[9]	0.0			17.6
Regulatory Assets Currently Earning Return [Member] | Regulatory Assets Pending Final Regulatory Approval [Member] | Appalachian Power Co [Member] | COVID-19 - Virginia
Public Utilities, General Disclosures [Line Items]
Regulatory Assets, Noncurrent		7.0			7.0
Regulatory Assets Currently Earning Return [Member] | Regulatory Assets Pending Final Regulatory Approval [Member] | Indiana Michigan Power Co [Member] | Other Regulatory Assets Not Yet Being Recovered [Member]
Public Utilities, General Disclosures [Line Items]
Regulatory Assets, Noncurrent		0.2			0.1
Regulatory Assets Currently Earning Return [Member] | Regulatory Assets Pending Final Regulatory Approval [Member] | Southwestern Electric Power Co [Member] | Dolet Hills Power Station Accelerated Depreciation [Member]
Public Utilities, General Disclosures [Line Items]
Regulatory Assets, Noncurrent		12.0			9.7
Regulatory Assets Currently Earning Return [Member] | Regulatory Assets Pending Final Regulatory Approval [Member] | Southwestern Electric Power Co [Member] | Other Regulatory Assets Not Yet Being Recovered [Member]
Public Utilities, General Disclosures [Line Items]
Regulatory Assets, Noncurrent		1.7			2.5
Regulatory Assets Currently Earning Return [Member] | Regulatory Assets Pending Final Regulatory Approval [Member] | Southwestern Electric Power Co [Member] | February 2021 Severe Storm Fuel Costs
Public Utilities, General Disclosures [Line Items]
Regulatory Assets, Noncurrent	[10]	101.4			121.7
Regulatory Assets, Current		37.0			37.0
Regulatory Assets Currently Earning Return [Member] | Regulatory Assets Pending Final Regulatory Approval [Member] | Southwestern Electric Power Co [Member] | Pirkey Power Plant Accelerated Depreciation
Public Utilities, General Disclosures [Line Items]
Regulatory Assets, Noncurrent		113.0			116.5
Regulatory Assets Currently Earning Return [Member] | Regulatory Assets Pending Final Regulatory Approval [Member] | Southwestern Electric Power Co [Member] | Welsh Unit 1 and 3 Accelerated Depreciation
Public Utilities, General Disclosures [Line Items]
Regulatory Assets, Noncurrent		115.5			85.6
Regulatory Assets Currently Earning Return [Member] | Regulatory Assets Pending Final Regulatory Approval [Member] | Southwestern Electric Power Co [Member] | Dolet Hills Power Station Fuel Costs - Louisiana
Public Utilities, General Disclosures [Line Items]
Regulatory Assets, Noncurrent		34.7			32.0
Regulatory Assets Currently Not Earning Return [Member] | Regulatory Assets Pending Final Regulatory Approval [Member] | Plant Retirement Costs - Asset Retirement Obligation Costs [Member]
Public Utilities, General Disclosures [Line Items]
Regulatory Assets, Noncurrent		25.9			25.9
Regulatory Assets Currently Not Earning Return [Member] | Regulatory Assets Pending Final Regulatory Approval [Member] | Storm Related Costs [Member]
Public Utilities, General Disclosures [Line Items]
Regulatory Assets, Noncurrent	[11],[13]	385.8	[12]		407.2
Regulatory Assets Currently Not Earning Return [Member] | Regulatory Assets Pending Final Regulatory Approval [Member] | Other Regulatory Assets Not Yet Being Recovered [Member]
Public Utilities, General Disclosures [Line Items]
Regulatory Assets, Noncurrent		51.6			55.6
Regulatory Assets Currently Not Earning Return [Member] | Regulatory Assets Pending Final Regulatory Approval [Member] | 2020-2022 Virginia Triennial Review [Member]
Public Utilities, General Disclosures [Line Items]
Regulatory Assets, Noncurrent		37.4			37.9
Regulatory Assets Currently Not Earning Return [Member] | Regulatory Assets Pending Final Regulatory Approval [Member] | AEP Texas Inc. [Member] | Storm Related Costs [Member]
Public Utilities, General Disclosures [Line Items]
Regulatory Assets, Noncurrent		35.9			26.7
Regulatory Assets Currently Not Earning Return [Member] | Regulatory Assets Pending Final Regulatory Approval [Member] | AEP Texas Inc. [Member] | Other Regulatory Assets Not Yet Being Recovered [Member]
Public Utilities, General Disclosures [Line Items]
Regulatory Assets, Noncurrent		16.3			13.4
Regulatory Assets Currently Not Earning Return [Member] | Regulatory Assets Pending Final Regulatory Approval [Member] | AEP Texas Inc. [Member] | Texas Retail Electric Provider Bad Debt Expense
Public Utilities, General Disclosures [Line Items]
Regulatory Assets, Noncurrent		4.1			4.1
Regulatory Assets Currently Not Earning Return [Member] | Regulatory Assets Pending Final Regulatory Approval [Member] | AEP Texas Inc. [Member] | Vegetation Management Programs
Public Utilities, General Disclosures [Line Items]
Regulatory Assets, Noncurrent		5.2			5.2
Regulatory Assets Currently Not Earning Return [Member] | Regulatory Assets Pending Final Regulatory Approval [Member] | Appalachian Power Co [Member] | Plant Retirement Costs - Asset Retirement Obligation Costs [Member]
Public Utilities, General Disclosures [Line Items]
Regulatory Assets, Noncurrent		25.9			25.9
Regulatory Assets Currently Not Earning Return [Member] | Regulatory Assets Pending Final Regulatory Approval [Member] | Appalachian Power Co [Member] | Storm Related Costs [Member]
Public Utilities, General Disclosures [Line Items]
Regulatory Assets, Noncurrent		72.2			72.6
Regulatory Assets Currently Not Earning Return [Member] | Regulatory Assets Pending Final Regulatory Approval [Member] | Appalachian Power Co [Member] | Other Regulatory Assets Not Yet Being Recovered [Member]
Public Utilities, General Disclosures [Line Items]
Regulatory Assets, Noncurrent		5.9			1.1
Regulatory Assets Currently Not Earning Return [Member] | Regulatory Assets Pending Final Regulatory Approval [Member] | Appalachian Power Co [Member] | 2020-2022 Virginia Triennial Review [Member]
Public Utilities, General Disclosures [Line Items]
Regulatory Assets, Noncurrent		37.4			37.9
Regulatory Assets Currently Not Earning Return [Member] | Regulatory Assets Pending Final Regulatory Approval [Member] | Indiana Michigan Power Co [Member] | Storm Related Costs [Member]
Public Utilities, General Disclosures [Line Items]
Regulatory Assets, Noncurrent		29.4			21.6
Regulatory Assets Currently Not Earning Return [Member] | Regulatory Assets Pending Final Regulatory Approval [Member] | Indiana Michigan Power Co [Member] | Other Regulatory Assets Not Yet Being Recovered [Member]
Public Utilities, General Disclosures [Line Items]
Regulatory Assets, Noncurrent		2.7			2.0
Regulatory Assets Currently Not Earning Return [Member] | Regulatory Assets Pending Final Regulatory Approval [Member] | Ohio Power Co [Member] | Storm Related Costs [Member]
Public Utilities, General Disclosures [Line Items]
Regulatory Assets, Noncurrent	[14]	21.2			33.8
Regulatory Assets Currently Not Earning Return [Member] | Regulatory Assets Pending Final Regulatory Approval [Member] | Ohio Power Co [Member] | Storm-Related Costs Recovery Request [Member]
Public Utilities, General Disclosures [Line Items]
Regulatory Assets, Noncurrent		34.0
Regulatory Assets Currently Not Earning Return [Member] | Regulatory Assets Pending Final Regulatory Approval [Member] | Public Service Co Of Oklahoma [Member] | Storm Related Costs [Member]
Public Utilities, General Disclosures [Line Items]
Regulatory Assets, Noncurrent		92.8	[15]		25.5
Regulatory Assets Currently Not Earning Return [Member] | Regulatory Assets Pending Final Regulatory Approval [Member] | Public Service Co Of Oklahoma [Member] | Other Regulatory Assets Not Yet Being Recovered [Member]
Public Utilities, General Disclosures [Line Items]
Regulatory Assets, Noncurrent		0.2			0.1
Regulatory Assets Currently Not Earning Return [Member] | Regulatory Assets Pending Final Regulatory Approval [Member] | Public Service Co Of Oklahoma [Member] | Storm-Related Costs Recovery Request [Member]
Public Utilities, General Disclosures [Line Items]
Regulatory Assets, Noncurrent		58.0
Regulatory Assets Currently Not Earning Return [Member] | Regulatory Assets Pending Final Regulatory Approval [Member] | Southwestern Electric Power Co [Member] | Storm Related Costs [Member]
Public Utilities, General Disclosures [Line Items]
Regulatory Assets, Noncurrent		53.4	[16],[17]		151.5
Regulatory Assets Currently Not Earning Return [Member] | Regulatory Assets Pending Final Regulatory Approval [Member] | Southwestern Electric Power Co [Member] | Asset Retirement Obligation - Louisiana [Member]
Public Utilities, General Disclosures [Line Items]
Regulatory Assets, Noncurrent		0.0			11.8
Regulatory Assets Currently Not Earning Return [Member] | Regulatory Assets Pending Final Regulatory Approval [Member] | Southwestern Electric Power Co [Member] | Other Regulatory Assets Not Yet Being Recovered [Member]
Public Utilities, General Disclosures [Line Items]
Regulatory Assets, Noncurrent		14.8			$ 16.0
Regulatory Assets Currently Not Earning Return [Member] | Regulatory Assets Pending Final Regulatory Approval [Member] | Southwestern Electric Power Co [Member] | Storm-Related Costs Recovery Request [Member] | Louisiana Jurisdiction [Member]
Public Utilities, General Disclosures [Line Items]
Regulatory Assets, Noncurrent		29.0
Regulatory Assets Currently Not Earning Return [Member] | Regulatory Assets Pending Final Regulatory Approval [Member] | Southwestern Electric Power Co [Member] | Storm-Related Costs Recovery Request [Member] | Texas
Public Utilities, General Disclosures [Line Items]
Regulatory Assets, Noncurrent		$ 24.0

[1] Includes Northeastern Plant, Unit 4, which was retired in 2016. Removal of Northeastern Plant, Unit 4, will be performed with the removal of Northeastern Plant, Unit 3, after retirement.

[2] Northeastern Plant, Unit 3 is currently being recovered through 2040.

[3] Represents the amount of annual depreciation that has been collected from customers over the prior 12-month period.

[4] Includes Welsh Plant, Unit 2, which was retired in 2016. Removal of Welsh Plant, Unit 2, will be performed with the removal of Welsh Plant, Units 1 and 3, after retirement.

[5] Represents projected retirement date of coal assets, units are being evaluated for conversion to natural gas after 2028.

[6] Unit 1 is being recovered through 2027 in the Louisiana jurisdiction and through 2037 in the Arkansas and Texas jurisdictions. Unit 3 is being recovered through 2032 in the Louisiana jurisdiction and through 2042 in the Arkansas and Texas jurisdictions.

[7] Includes $37 million and $37 million of unrecovered winter storm fuel costs recorded as a current regulatory asset as of September 30, 2023 and December 31, 2022, respectively. See the “February 2021 Severe Winter Weather Impacts in SPP” section below for additional information.

[8] In October 2023, the PUCT issued an order approving a rider to recover deferred Texas Mobile Generation Costs. Recovery of deferred costs through the new rider is updated annually, subject to Commission review.

[9] In October 2023, the PUCT issued an order approving a rider to recover deferred Texas Mobile Generation Costs. Recovery of deferred costs through the new rider is updated annually, subject to Commission review.

[10] Includes $37 million and $37 million of unrecovered winter storm fuel costs recorded as a current regulatory asset as of September 30, 2023 and December 31, 2022, respectively. See the “February 2021 Severe Winter Weather Impacts in SPP” section below for additional information.

[11] In April 2023, the LPSC issued an order approving the prudence and future recovery of the Louisiana storm-related regulatory assets. See “2021 Louisiana Storm Cost Filing” section below for additional information.

[12] In June 2023, storms in the Oklahoma, Louisiana and Texas service territories caused power outages and extensive damage resulting in the deferral of $58 million, $29 million and $24 million, respectively. Recovery of these storm costs will be addressed in a future request.

[13] In October 2023, the PUCO issued an order approving recovery of $34 million in Ohio storm-related costs.

[14] In October 2023, the PUCO issued an order approving recovery of $34 million in storm-related costs.

[15] In June 2023, storms caused power outages and extensive damage to the Oklahoma service territory, resulting in the deferral of $58 million. Recovery for these storm costs will be addressed in a future request.

[16] In April 2023, the LPSC issued an order approving the prudence and future recovery of the Louisiana storm-related regulatory assets. See “2021 Louisiana Storm Cost Filing” section below for additional information.

[17] In June 2023, additional storms in the Louisiana and Texas service territories caused power outages and extensive damage resulting in the deferral of $29 million and $24 million, respectively. Recovery of these storm costs will be addressed in a future request.

XML

Rate Matters East Companies (Details) - USD ($) $ in Millions	1 Months Ended	9 Months Ended
	Oct. 31, 2023	Sep. 30, 2023	Dec. 31, 2022
Public Utilities, General Disclosures [Line Items]
Net Property, Plant and Equipment		$ 75,821.1	$ 73,339.1
AEP Transmission Co [Member]
Public Utilities, General Disclosures [Line Items]
Net Property, Plant and Equipment		14,318.9	13,339.9
Appalachian Power Co [Member]
Public Utilities, General Disclosures [Line Items]
Net Property, Plant and Equipment		12,825.1	12,379.2
Indiana Michigan Power Co [Member]
Public Utilities, General Disclosures [Line Items]
Net Property, Plant and Equipment		7,535.7	7,411.5
Ohio Power Co [Member]
Public Utilities, General Disclosures [Line Items]
Net Property, Plant and Equipment		9,160.0	$ 8,609.3
ENEC Filing | Appalachian Power Co [Member]
Public Utilities, General Disclosures [Line Items]
2021 Requested Increase in ENEC Revenues		73.0
2021 Cumulative ENEC Under Recovery		55.0
2021 Projected ENEC Cost Incease		18.0
2021 Approved ENEC Rate Increase		7.0
2021 Approved Reduction in ENEC Projected Costs		48.0
2022 Requested Increase in ENEC Rates		155.0
2022 Requested Increase in ENEC Rates Second Filing		297.0
2022 Approved Projected ENEC Rate Increase		31.0
2022 Approved Overall ENEC Rate Increase		93.0
2022 Recommended ENEC Under-Recovery Disallowance		83.0
2022 Recommended Increase in ENEC Rates		13.0
2023 Alt One Annual Increase in ENEC		293.0
2023 Alt One Current Year ENEC Increase		89.0
2023 Alt One Under Recovery		200.0
2023 Alt Two Annual Increase in ENEC Rates		89.0
2023 Alt Two Asset Securitization		1,900.0
2023 Alt Two Under Recovery		553.0
2023 Alt Two Major Storm Expense Deferrals		88.0
2023 Alt Two WV Amos and Mountaineer Book Value and CCR and ELG Investments		$ 1,200.0
Opinion Coal Fired Plants Capacity Factor		69.00%
Opinion Recommended Disallowance Factor		52.90%
September 2022 Cumulative ENEC Under Recovery Balance		$ 430.0
Potential Cumulative ENEC Under Recovery Disallowance		285.0
2023 Staff and Intervenor Recommended Under Recovery		262.0
2023 Approved Annual Increase in ENEC Rates		$ 89.0
2023 Intervenor Recommended Share of OSS Revenues with Customers		75.00%
ENEC Filing | Appalachian Power Co [Member] | Subsequent Event [Member]
Public Utilities, General Disclosures [Line Items]
2023 Intervenor Recommended Under Recovery Disallowance	$ 553.0
Michigan Power Supply Cost Recovery Reconciliation | Indiana Michigan Power Co [Member]
Public Utilities, General Disclosures [Line Items]
Recommended Disallowance		$ 18.0
Potential Disallowed Costs		14.0
OVEC ICPA Recommended Disallowance		$ 1.0
2020-2022 Virginia Triennial Review [Member] | Appalachian Power Co [Member]
Public Utilities, General Disclosures [Line Items]
Requested Return on Equity		10.60%
Staff and Intervenor Recommended Annual Increase		$ 127.0
Requested Annual Base Rate Increase		213.0
Requested Annual Base Rate Increase Vegetation Management Portion		47.0
Requested annual Base Rate Incresae Depreciation Expense Portion		$ 35.0
Staff and Intervenor Recommended Return on Equity		9.50%
Staff and Intervenor Recommended Storm Costs Regulatory Asset		$ 50.0
Ohio ESP Filings [Member] | Ohio Power Co [Member]
Public Utilities, General Disclosures [Line Items]
Approved Return on Common Equity		9.70%
Proprosed ESP Return on Common Equity		10.65%
Fuel Adjustment Clause Purchased Power Limitation [Member] | Kentucky Power Co [Member]
Public Utilities, General Disclosures [Line Items]
Requested Purchased Power Costs Not Recoverable Through FAC Recovery		$ 12.0
2023 Kentucky Base Rate and Securitization Case [Member] | Kentucky Power Co [Member]
Public Utilities, General Disclosures [Line Items]
Requested Return on Equity		9.90%
Requested Annual Base Rate Increase		$ 94.0
Requested Purchased Power Costs Not Recoverable Through FAC Recovery		16.0
Requested Annual Base Rate Storm Level Restoration Expense		1.0
Requested Securitization Bonds Regulatory Assets Recovery		471.0
Requested Securitization Bonds Plant Recovery Retirement Costs		289.0
Requested Securitization Bonds Deferred Storm Costs		79.0
Requested Securitization Bonds Deferred Purchased Power Expenses		52.0
Requested Securitization Bonds Under-Recovered Purchased Power Rider Costs		51.0
2023 Kentucky Base Rate and Securitization Case [Member] | Kentucky Power Co [Member] | Subsequent Event [Member]
Public Utilities, General Disclosures [Line Items]
Intervenor Recommended Annual Increase	63.0
Intervenor Recommended Opposition to Tax Related Regulatory Asset	33.0
Intervenor Recommended Opposition to Purchased Power Recovery	16.0
Intervenor Recommended Opposition to Return on Retirement Costs	$ 42.0
2023 Indiana Base Rate Case [Member] | Indiana Michigan Power Co [Member]
Public Utilities, General Disclosures [Line Items]
Requested Annual Increase		$ 116.0
Requested Return on Equity		10.50%
Amount of Increase Related to Annual Depreciation Expense		$ 41.0
Requested Deferred Storm Costs		$ 15.0
Requested Debt Capital Structure		48.80%
Requested Equity Capital Structure		51.20%
2023 Michigan Base Rate Case [Member] | Indiana Michigan Power Co [Member]
Public Utilities, General Disclosures [Line Items]
Requested Annual Increase		$ 34.0
Requested Return on Equity		10.50%
Amount of Increase Related to Annual Depreciation Expense		$ 11.0
Requested Debt Capital Structure		49.40%
Requested Equity Capital Structure		50.60%
Minimum [Member] | ENEC Filing | Appalachian Power Co [Member]
Public Utilities, General Disclosures [Line Items]
2023 Staff and Intervenor Recommended Carrying Charges		2.00%
Minimum [Member] | 2023 Kentucky Base Rate and Securitization Case [Member] | Kentucky Power Co [Member] | Subsequent Event [Member]
Public Utilities, General Disclosures [Line Items]
Intervenor Recommended Return on Equity	9.30%
Maximum [Member] | ENEC Filing | Appalachian Power Co [Member]
Public Utilities, General Disclosures [Line Items]
2023 Staff and Intervenor Recommended Carrying Charges		4.00%
Maximum [Member] | 2023 Kentucky Base Rate and Securitization Case [Member] | Kentucky Power Co [Member] | Subsequent Event [Member]
Public Utilities, General Disclosures [Line Items]
Intervenor Recommended Return on Equity	9.70%

XML

Rate Matters West Companies (Details) $ in Millions	9 Months Ended
	Sep. 30, 2023 USD ($) MW	Dec. 31, 2022 USD ($)
Public Utilities, General Disclosures [Line Items]
Regulatory Assets, Noncurrent	$ 4,607.3	$ 4,762.0
Regulatory Assets Pending Final Regulatory Approval [Member]
Public Utilities, General Disclosures [Line Items]
Regulatory Assets, Noncurrent	886.3	919.3
Public Service Co Of Oklahoma [Member]
Public Utilities, General Disclosures [Line Items]
Regulatory Assets, Noncurrent	477.2	653.7
Public Service Co Of Oklahoma [Member] | Regulatory Assets Pending Final Regulatory Approval [Member]
Public Utilities, General Disclosures [Line Items]
Regulatory Assets, Noncurrent	93.0	25.6
Southwestern Electric Power Co [Member]
Public Utilities, General Disclosures [Line Items]
Regulatory Assets, Noncurrent	1,116.9	1,042.4
Southwestern Electric Power Co [Member] | Regulatory Assets Pending Final Regulatory Approval [Member]
Public Utilities, General Disclosures [Line Items]
Regulatory Assets, Noncurrent	446.5	547.3
AEP Texas Inc. [Member]
Public Utilities, General Disclosures [Line Items]
Regulatory Assets, Noncurrent	307.7	298.3
AEP Texas Inc. [Member] | Regulatory Assets Pending Final Regulatory Approval [Member]
Public Utilities, General Disclosures [Line Items]
Regulatory Assets, Noncurrent	$ 61.5	67.0
ETT Interim Transmission Rates [Member]
Public Utilities, General Disclosures [Line Items]
Parent Ownership Interest In ETT	50.00%
AEP Share Of ETT Cumulative Revenues Subject To Review	$ 1,600.0
February 2021 Severe Storm Fuel Costs | Southwestern Electric Power Co [Member]
Public Utilities, General Disclosures [Line Items]
Regulatory Assets, Noncurrent	269.4	329.0
February 2021 Severe Storm Fuel Costs | Southwestern Electric Power Co [Member] | Arkansas
Public Utilities, General Disclosures [Line Items]
Regulatory Assets, Noncurrent	$ 59.4	74.9
Remaining Recovery Period	6 years
February 2021 Severe Storm Fuel Costs | Southwestern Electric Power Co [Member] | Louisiana Jurisdiction [Member]
Public Utilities, General Disclosures [Line Items]
Regulatory Assets, Noncurrent	$ 101.4	121.7
February 2021 Severe Storm Fuel Costs | Southwestern Electric Power Co [Member] | Texas
Public Utilities, General Disclosures [Line Items]
Regulatory Assets, Noncurrent	$ 108.6	$ 132.4
Approved Carrying Charge	1.65%
Remaining Recovery Period	5 years
2012 Texas Base Rate Case [Member] | Southwestern Electric Power Co [Member]
Public Utilities, General Disclosures [Line Items]
2013 Reversal Of Previously Recorded Regulatory Disallowances	$ 114.0
Estimated Reduced Annual Revenues	15.0
2012 Texas Base Rate Case [Member] | Southwestern Electric Power Co [Member] | Minimum [Member]
Public Utilities, General Disclosures [Line Items]
Estimated Turk AFUDC Disallowance	80.0
Estimated Turk AFUDC Refunds	0.0
2012 Texas Base Rate Case [Member] | Southwestern Electric Power Co [Member] | Maximum [Member]
Public Utilities, General Disclosures [Line Items]
Estimated Turk AFUDC Disallowance	90.0
Estimated Turk AFUDC Refunds	200.0
2016 Texas Base Rate Case [Member] | Southwestern Electric Power Co [Member]
Public Utilities, General Disclosures [Line Items]
Requested Net Increase in Texas Annual Revenues	69.0
Approved Net Increase in Texas Annual Revenues	$ 50.0
Approved Return on Common Equity	9.60%
Approved Additional Vegetation Management Expenses	$ 2.0
Impairment Charge Total	19.0
Impairment Charge Welsh Plant, Unit 2	7.0
Impairment Charge Disallowed Plant Investments	12.0
Additional Revenues Recognized to be Surcharged to Customers	32.0
Additional Recognized Expenses Consisting Primarily of Depreciation and Vegetation Management	$ 7.0
Requested Return on Equity	10.00%
2020 Texas Base Rate Case [Member] | Southwestern Electric Power Co [Member]
Public Utilities, General Disclosures [Line Items]
Approved Return on Common Equity	9.25%
Impairment Charge Total	$ 12.0
Requested Annual Increase	$ 105.0
Requested Return on Equity	10.35%
Requested Net Annual Increase	$ 90.0
Revised Requested Annual Increase	100.0
Revised Requested Net Annual Increase	85.0
Approved Annual Revenue Increase	39.0
Amount of Approved Increase Related to Vegetation Management	5.0
Amount of Approved Increase Related to Storm Catastrophe Reserve	$ 2.0
2020 Louisiana Base Rate Case | Southwestern Electric Power Co [Member]
Public Utilities, General Disclosures [Line Items]
Requested Return on Equity	10.35%
Approved Return on Common Equity	9.50%
Requested Annual Increase	$ 134.0
Revised Requested Annual Increase	95.0
Approved Annual Revenue Increase	27.0
Authorized Annual Base Rate Increase	21.0
Approved Rider to Recover Dolet Hills and Pirkey Costs	14.0
Reduction in Fuel Costs	$ 8.0
2021 Louisiana Storm Cost Filing | Southwestern Electric Power Co [Member]
Public Utilities, General Disclosures [Line Items]
Interim WACC	3.125%
Approved Deferred Storm Costs	$ 150.0
AEP Texas Interim Transmission and Distribution Rates [Member] | AEP Texas Inc. [Member]
Public Utilities, General Disclosures [Line Items]
AEP Texas Cumulative Revenues Subject to Review	$ 884.0
2022 Oklahoma Base Rate Case [Member] | Public Service Co Of Oklahoma [Member]
Public Utilities, General Disclosures [Line Items]
Requested Return on Equity	10.40%
Amount of Increase Related to Annual Depreciation Expense	$ 47.0
Requested Debt Capital Structure	45.40%
Requested Equity Capital Structure	54.60%
Requested Net Increase in Oklahoma Annual Revenues	$ 173.0
Amount of Increase Related to Annual Amortization Expense	$ 16.0
Wind Generation MWs | MW	154
OCC Staff and Intervenor Recommended Plant Investments	$ 9.0
Contested Joint Agreement Base Rate Annual Revenue Increase	$ 50.0
Contested Joint Agreement Return on Equity	9.50%
Contested Joint Agreement Debt Capital Structure	45.40%
Contested Joint Agreement Equity Capital Structure	54.60%
Contested Joint Agreement Distribution Investments Recovery	$ 6.0
Contested Joint Agreement Interim Annual Base Rate Cumulative Revenue Increase	80.0
2022 Oklahoma Base Rate Case [Member] | Public Service Co Of Oklahoma [Member] | Minimum [Member]
Public Utilities, General Disclosures [Line Items]
OCC Staff and Intervenor Recommended Annual Revenue Change Range	$ 42.0
OCC Staff and Intervenor Recommended ROE Range	8.60%
2022 Oklahoma Base Rate Case [Member] | Public Service Co Of Oklahoma [Member] | Maximum [Member]
Public Utilities, General Disclosures [Line Items]
OCC Staff and Intervenor Recommended Annual Revenue Change Range	$ 49.0
OCC Staff and Intervenor Recommended ROE Range	9.50%

XML

Rate Matters FERC (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2021
FERC PJM Transmission Formula Rate Challenge [Member]
Public Utilities, General Disclosures [Line Items]
Stand Alone Treatment of NOLCs Annual Revenue Increase	$ 60.0	$ 69.0	$ 78.0
FERC RTO Incentive Complaint [Member]
Public Utilities, General Disclosures [Line Items]
Estimated Pretax Income Reduction	20.0
Independence Energy Connection Project [Member]
Public Utilities, General Disclosures [Line Items]
AEP Share of Independence Energy Connection Capital Costs	$ 92.0
Ohio Power Co [Member] | Ohio Transmission Company [Member] | FERC RTO Incentive Complaint [Member]
Public Utilities, General Disclosures [Line Items]
Basis Point RTO Incentive	50.00%

XML

Commitments, Guarantees and Contingencies (Details) $ in Millions	Sep. 30, 2023 USD ($)
Maximum Potential Loss [Abstract]
Max Potential Loss on Master Lease Agreements	$ 44.8
AEP Texas Inc. [Member]
Maximum Potential Loss [Abstract]
Max Potential Loss on Master Lease Agreements	10.9
Appalachian Power Co [Member]
Maximum Potential Loss [Abstract]
Max Potential Loss on Master Lease Agreements	5.6
Indiana Michigan Power Co [Member]
Maximum Potential Loss [Abstract]
Max Potential Loss on Master Lease Agreements	4.2
Ohio Power Co [Member]
Maximum Potential Loss [Abstract]
Max Potential Loss on Master Lease Agreements	6.9
Public Service Co Of Oklahoma [Member]
Maximum Potential Loss [Abstract]
Max Potential Loss on Master Lease Agreements	4.7
Southwestern Electric Power Co [Member]
Maximum Potential Loss [Abstract]
Max Potential Loss on Master Lease Agreements	5.3
Letters of Credit [Member]
Maximum Future Payments for Letters of Credit [Abstract]
Maximum Future Payments for Letters of Credit Issued Under the Uncommitted Facility	249.1
Commitments, Guarantees and Contingencies (Textuals) [Abstract]
Letters of Credit Limit	1,200.0
Uncommitted Facility	450.0
Letters of Credit [Member] | AEP Texas Inc. [Member]
Maximum Future Payments for Letters of Credit [Abstract]
Maximum Future Payments for Letters of Credit Issued Under the Uncommitted Facility	1.8
Letters of Credit [Member] | Appalachian Power Co [Member]
Maximum Future Payments for Letters of Credit [Abstract]
Maximum Future Payments for Letters of Credit Issued Under the Uncommitted Facility	6.3
Letters of Credit [Member] | Indiana Michigan Power Co [Member]
Maximum Future Payments for Letters of Credit [Abstract]
Maximum Future Payments for Letters of Credit Issued Under the Uncommitted Facility	2.9
March 2027 | Letters of Credit [Member]
Commitments, Guarantees and Contingencies (Textuals) [Abstract]
Revolving Credit Facilities	4,000.0
March 2024 | Letters of Credit [Member]
Commitments, Guarantees and Contingencies (Textuals) [Abstract]
Revolving Credit Facilities	$ 1,000.0

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Acquisitions and Dispositions (Details)		3 Months Ended		9 Months Ended
		Sep. 30, 2022 USD ($)	Jun. 30, 2022 USD ($)	Sep. 30, 2023 USD ($) MW	Sep. 30, 2022 USD ($)	Dec. 31, 2022 USD ($)
Accounts Receivable and Accrued Unbilled Revenues				$ 976,800,000		$ 1,145,100,000
Net Property, Plant and Equipment				75,821,100,000		73,339,100,000
Accounts Payable, Current				2,258,600,000		2,670,800,000
Asset Retirement Obligation	[1],[2],[3],[4],[5],[6]			2,959,500,000		2,944,900,000
Proceeds from Sale of Property, Plant, and Equipment				1,335,600,000	$ 215,700,000
North Central Wind Energy Facilities
Payments to Acquire Property, Plant, and Equipment				2,000,000,000
Transmission Operations [Member]
Enterprise Value				2,850,000,000
Transmission Operations [Member] | Proceeds for KY Operations
Enterprise Value				2,646,000,000
Generation And Marketing [Member] | Proceeds of Mineral Rights Sale
Proceeds from Sale of Property, Plant, and Equipment			$ 120,000,000
Gain (Loss) on Disposition of Other Assets			116,000,000
Generation And Marketing [Member] | BP Wind Energy
Impairment of Equity Method Investment		$ 2,000,000	$ 186,000,000
Generation And Marketing [Member] | Competitive Contracted Renewables
Proceeds from Sale of Productive Assets				1,200,000,000
Gain (Loss) on Disposition of Business				112,000,000
gain (loss) on Disposition of Business net of Tax				88,000,000
Vertically Integrated Utilities [Member]
Enterprise Value				2,850,000,000
Pretax Reduction in Investment Basis				335,000,000
Vertically Integrated Utilities [Member] | Proceeds for KY Operations
Enterprise Value				$ 2,646,000,000
Vertically Integrated Utilities [Member] | Sundance [Member]
Wind Generation MWs | MW				199
Vertically Integrated Utilities [Member] | Maverick [Member]
Wind Generation MWs | MW				287
Vertically Integrated Utilities [Member] | Traverse [Member]
Wind Generation MWs | MW				998
Vertically Integrated Utilities [Member] | Traverse [Member] | North Central Wind Energy Facilities
Payments to Acquire Property, Plant, and Equipment				$ 1,200,000,000
Vertically Integrated Utilities [Member] | North Central Wind Energy Facilities
Wind Generation MWs | MW				1,484
Public Service Co Of Oklahoma [Member]
Percentage of an Asset Acquired				45.50%
Payments to Acquire Property, Plant, and Equipment				$ 146,000,000
Accounts Receivable and Accrued Unbilled Revenues				78,800,000		70,100,000
Net Property, Plant and Equipment				6,025,100,000		5,626,500,000
Accounts Payable, Current				$ 233,300,000		202,900,000
Southwestern Electric Power Co [Member]
Percentage of an Asset Acquired				54.50%
Payments to Acquire Property, Plant, and Equipment				$ 0	$ 658,000,000.0
Accounts Receivable and Accrued Unbilled Revenues				32,900,000		38,800,000
Net Property, Plant and Equipment				8,562,500,000		8,262,200,000
Accounts Payable, Current				232,100,000		213,100,000
Asset Retirement Obligation	[1],[3],[4],[5]			261,800,000		282,200,000
AEP Transmission Co [Member]
Accounts Receivable and Accrued Unbilled Revenues				80,400,000		46,900,000
Net Property, Plant and Equipment				14,318,900,000		13,339,900,000
Accounts Payable, Current				$ 336,100,000		$ 427,800,000

[1] In 2023, SWEPCo settled $35 million of costs related to closure/reclamation work performed due to the recent retirements of the Pirkey Plant and Dolet Hills Power Station. See “Coal-Fired Generation Plants” section of Note 4 for additional information.

[2] In August 2023, AEP completed the sale of its competitive contracted renewables portfolio to a nonaffiliated party and settled ARO liabilities of $31 million. See “Disposition of the Competitive Contracted Renewables Portfolio” section of Note 6 for additional information

[3] Includes ARO related to Sabine and DHLC.

[4] Includes ARO related to asbestos removal.

[5] Includes ARO related to ash disposal facilities.

[6] Includes ARO related to nuclear decommissioning costs for the Cook Plant of $2.05 billion and $2 billion as of September 30, 2023 and December 31, 2022, respectively.

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Benefit Plans (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Pension Plans [Member]
Components of Net Periodic Benefit Cost
Service Cost	$ 23.6	$ 30.7	$ 70.8	$ 92.3
Interest Cost	54.8	37.1	164.4	111.2
Expected Return on Plan Assets	(84.8)	(63.4)	(254.4)	(190.1)
Amortization of Net Actuarial Loss	0.3	15.8	1.0	47.3
Net Periodic Benefit Cost (Credit)	(6.1)	20.2	(18.2)	60.7
Pension Plans [Member] | AEP Texas Inc. [Member]
Components of Net Periodic Benefit Cost
Service Cost	2.1	2.8	6.2	8.4
Interest Cost	4.5	3.1	13.7	9.1
Expected Return on Plan Assets	(7.0)	(5.3)	(21.0)	(15.8)
Amortization of Net Actuarial Loss	0.0	1.2	0.0	3.8
Net Periodic Benefit Cost (Credit)	(0.4)	1.8	(1.1)	5.5
Pension Plans [Member] | Appalachian Power Co [Member]
Components of Net Periodic Benefit Cost
Service Cost	2.3	2.9	6.8	8.6
Interest Cost	6.6	4.3	19.8	13.1
Expected Return on Plan Assets	(11.2)	(8.1)	(33.5)	(24.3)
Amortization of Net Actuarial Loss	0.0	1.9	0.0	5.5
Net Periodic Benefit Cost (Credit)	(2.3)	1.0	(6.9)	2.9
Pension Plans [Member] | Indiana Michigan Power Co [Member]
Components of Net Periodic Benefit Cost
Service Cost	2.9	4.0	8.9	12.1
Interest Cost	6.3	4.3	18.7	12.7
Expected Return on Plan Assets	(11.0)	(8.1)	(33.1)	(24.2)
Amortization of Net Actuarial Loss	0.0	1.8	0.0	5.3
Net Periodic Benefit Cost (Credit)	(1.8)	2.0	(5.5)	5.9
Pension Plans [Member] | Ohio Power Co [Member]
Components of Net Periodic Benefit Cost
Service Cost	2.1	2.8	6.3	8.4
Interest Cost	5.0	3.4	14.9	10.0
Expected Return on Plan Assets	(8.6)	(6.2)	(25.6)	(18.6)
Amortization of Net Actuarial Loss	0.0	1.3	0.0	4.1
Net Periodic Benefit Cost (Credit)	(1.5)	1.3	(4.4)	3.9
Pension Plans [Member] | Public Service Co Of Oklahoma [Member]
Components of Net Periodic Benefit Cost
Service Cost	1.4	1.8	4.2	5.5
Interest Cost	2.7	1.8	8.1	5.3
Expected Return on Plan Assets	(4.6)	(3.3)	(13.8)	(10.1)
Amortization of Net Actuarial Loss	0.0	0.7	0.0	2.2
Net Periodic Benefit Cost (Credit)	(0.5)	1.0	(1.5)	2.9
Pension Plans [Member] | Southwestern Electric Power Co [Member]
Components of Net Periodic Benefit Cost
Service Cost	2.0	2.7	5.8	8.0
Interest Cost	3.4	2.2	10.4	6.8
Expected Return on Plan Assets	(4.8)	(3.6)	(14.5)	(10.9)
Amortization of Net Actuarial Loss	0.0	0.9	0.0	2.8
Net Periodic Benefit Cost (Credit)	0.6	2.2	1.7	6.7
Other Postretirement Benefit Plans [Member]
Components of Net Periodic Benefit Cost
Service Cost	1.1	1.8	3.4	5.5
Interest Cost	11.6	7.3	34.7	21.9
Expected Return on Plan Assets	(27.4)	(27.5)	(82.2)	(82.5)
Amortization of Prior Service Cost (Credit)	(15.8)	(17.9)	(47.3)	(53.6)
Amortization of Net Actuarial Loss	3.7		11.1
Net Periodic Benefit Cost (Credit)	(26.8)	(36.3)	(80.3)	(108.7)
Other Postretirement Benefit Plans [Member] | AEP Texas Inc. [Member]
Components of Net Periodic Benefit Cost
Service Cost	0.1	0.1	0.3	0.3
Interest Cost	0.9	0.6	2.7	1.7
Expected Return on Plan Assets	(2.2)	(2.3)	(6.7)	(6.8)
Amortization of Prior Service Cost (Credit)	(1.3)	(1.5)	(4.0)	(4.5)
Amortization of Net Actuarial Loss	0.3		0.9
Net Periodic Benefit Cost (Credit)	(2.2)	(3.1)	(6.8)	(9.3)
Other Postretirement Benefit Plans [Member] | Appalachian Power Co [Member]
Components of Net Periodic Benefit Cost
Service Cost	0.1	0.2	0.4	0.6
Interest Cost	1.8	1.2	5.5	3.5
Expected Return on Plan Assets	(4.0)	(4.1)	(12.0)	(12.2)
Amortization of Prior Service Cost (Credit)	(2.3)	(2.6)	(6.9)	(7.8)
Amortization of Net Actuarial Loss	0.6		1.7
Net Periodic Benefit Cost (Credit)	(3.8)	(5.3)	(11.3)	(15.9)
Other Postretirement Benefit Plans [Member] | Indiana Michigan Power Co [Member]
Components of Net Periodic Benefit Cost
Service Cost	0.1	0.2	0.5	0.7
Interest Cost	1.3	0.8	4.0	2.5
Expected Return on Plan Assets	(3.3)	(3.3)	(10.1)	(10.2)
Amortization of Prior Service Cost (Credit)	(2.2)	(2.4)	(6.5)	(7.3)
Amortization of Net Actuarial Loss	0.5		1.4
Net Periodic Benefit Cost (Credit)	(3.6)	(4.7)	(10.7)	(14.3)
Other Postretirement Benefit Plans [Member] | Ohio Power Co [Member]
Components of Net Periodic Benefit Cost
Service Cost	0.1	0.2	0.3	0.5
Interest Cost	1.2	0.7	3.5	2.2
Expected Return on Plan Assets	(2.9)	(3.0)	(8.8)	(8.9)
Amortization of Prior Service Cost (Credit)	(1.6)	(1.8)	(4.7)	(5.4)
Amortization of Net Actuarial Loss	0.4		1.2
Net Periodic Benefit Cost (Credit)	(2.8)	(3.9)	(8.5)	(11.6)
Other Postretirement Benefit Plans [Member] | Public Service Co Of Oklahoma [Member]
Components of Net Periodic Benefit Cost
Service Cost	0.1	0.2	0.2	0.4
Interest Cost	0.6	0.4	1.8	1.1
Expected Return on Plan Assets	(1.5)	(1.6)	(4.4)	(4.6)
Amortization of Prior Service Cost (Credit)	(1.0)	(1.1)	(3.0)	(3.3)
Amortization of Net Actuarial Loss	0.2		0.6
Net Periodic Benefit Cost (Credit)	(1.6)	(2.1)	(4.8)	(6.4)
Other Postretirement Benefit Plans [Member] | Southwestern Electric Power Co [Member]
Components of Net Periodic Benefit Cost
Service Cost	0.0	0.1	0.2	0.4
Interest Cost	0.8	0.5	2.2	1.4
Expected Return on Plan Assets	(1.8)	(1.8)	(5.4)	(5.5)
Amortization of Prior Service Cost (Credit)	(1.3)	(1.4)	(3.7)	(4.0)
Amortization of Net Actuarial Loss	0.3		0.8
Net Periodic Benefit Cost (Credit)	$ (2.0)	$ (2.6)	$ (5.9)	$ (7.7)

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Business Segments (Details) - USD ($) $ in Millions		3 Months Ended								9 Months Ended
		Sep. 30, 2023		Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2022		Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2023		Sep. 30, 2022		Dec. 31, 2022
Reportable Segment Information
Interest Expense		$ 470.3				$ 360.7				$ 1,346.0		$ 1,001.7
Revenue from Contracts with Customers		5,341.7				5,526.1				14,405.1		14,758.4
Revenues		5,341.7				5,526.1				14,405.1		14,758.4
Net Income (Loss)		958.3		$ 516.1	$ 400.4	683.3		$ 520.8	$ 718.1	1,874.8		1,922.2
Income Tax (Expense) Benefit		64.2				(16.1)				103.2		90.7
Balance Sheet Information
Total Property, Plant and Equipment		99,998.5								99,998.5				$ 97,021.4
Accumulated Depreciation and Amortization		24,177.4								24,177.4				23,682.3
TOTAL PROPERTY, PLANT AND EQUIPMENT - NET		75,821.1								75,821.1				73,339.1
Total Assets		95,125.6								95,125.6				93,403.3
Long-term Debt Due Within One Year		2,773.6								2,773.6				2,486.4
Long-term Debt		36,715.5								36,715.5				34,314.6
Total Long-term Debt Outstanding		39,489.1								39,489.1				36,801.0
Related Party
Reportable Segment Information
Revenue from Contracts with Customers		0.0				0.0				0.0		0.0
Reclassification out of Accumulated Other Comprehensive Income [Member]
Reportable Segment Information
Interest Expense	[1]	(1.3)				0.9				(1.1)		3.1
Income Tax (Expense) Benefit		(4.4)				(47.3)				9.8		(92.2)
Interest Rate [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member]
Reportable Segment Information
Interest Expense	[1]	(1.3)				0.9				(1.1)		3.1
Income Tax (Expense) Benefit		(0.2)				0.1				(0.2)		0.6
Vertically Integrated Utilities [Member]
Reportable Segment Information
Revenue from Contracts with Customers		3,158.1				3,174.6				8,603.4		8,416.4
Transmission and Distribution Utilities Revenues [Member]
Reportable Segment Information
Revenue from Contracts with Customers		1,535.2				1,525.5				4,321.3		4,064.5
Generation and Marketing Revenues [Member]
Reportable Segment Information
Revenue from Contracts with Customers		527.5				733.1				1,172.6		1,997.0
Generation and Marketing Revenues [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Reportable Segment Information
Revenue from Contracts with Customers	[1]					0.2						0.2
Generation and Marketing Revenues [Member] | Interest Rate [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member]
Reportable Segment Information
Revenue from Contracts with Customers	[1]					0.0						0.0
Other Revenues [Member]
Reportable Segment Information
Revenue from Contracts with Customers		120.9				92.9				307.8		280.5
Revenues		8.5	[2]			128.3	[3],[4]			(250.2)	[5],[6]	429.4	[7],[8]
AEP Transmission Co [Member]
Reportable Segment Information
Interest Expense		51.6				42.7				147.5		119.7
Interest Income		1.6				0.7				5.7		1.0
Revenues from Related Parties, Net of Provisions for Refund		369.9				331.3				1,080.0		933.8
Revenues		462.7				418.5				1,349.2		1,183.3
Net Income (Loss)		179.2		$ 175.7	$ 162.7	152.7		$ 118.5	$ 155.4	517.6		426.6
Income Tax (Expense) Benefit		46.1				44.3				142.9		124.1
Balance Sheet Information
Total Property, Plant and Equipment		15,540.1								15,540.1				14,366.9
Accumulated Depreciation and Amortization		1,221.2								1,221.2				1,027.0
TOTAL PROPERTY, PLANT AND EQUIPMENT - NET		14,318.9								14,318.9				13,339.9
Total Assets		14,712.0								14,712.0				13,814.2
Long-term Debt Due Within One Year		60.0								60.0				60.0
Long-term Debt		5,413.7								5,413.7				4,722.8
Total Long-term Debt Outstanding		5,473.7								5,473.7				4,782.8
AEP Transmission Co [Member] | Related Party
Reportable Segment Information
Revenue from Contracts with Customers		374.7				340.6				1,097.9		999.5
AEP Transmission Co [Member] | Other Revenues [Member]
Reportable Segment Information
Revenues		0.0	[9]			0.0	[10]			0.0	[11]	0.0	[12]
AEP Transmission Co [Member] | Transmission [Member]
Reportable Segment Information
Revenue from Contract with Customers, Net of Provisions for Refund, Including Assessed Tax		92.8				87.2				269.2		249.5
Revenue from Contracts with Customers		93.8				89.1				274.0		261.7
Reconciling Adjustments [Member]
Reportable Segment Information
Revenue from Contracts with Customers		0.0				0.0				0.0		0.0
Revenues		(508.4)				(425.0)				(1,416.3)		(1,190.5)
Net Income (Loss)		0.0				0.0				0.0		0.0
Balance Sheet Information
Total Assets	[13]	(3,381.8)								(3,381.8)				(5,783.0)
Reconciling Adjustments [Member] | Related Party
Reportable Segment Information
Revenue from Contracts with Customers		(508.4)				(425.0)				(1,416.3)		(1,190.5)
Reconciling Adjustments [Member] | Other Revenues [Member]
Reportable Segment Information
Revenues		(0.7)	[2]			(2.0)	[3],[4]			(3.6)	[5],[6]	(6.9)	[7],[8]
Reconciling Adjustments [Member] | AEP Transmission Co [Member]
Reportable Segment Information
Revenue from Contracts with Customers		0.0				0.0				0.0		0.0
Revenues		0.0				0.0				0.0		0.0
Net Income (Loss)		0.0				0.0				0.0		0.0
Balance Sheet Information
Total Assets	[14]	(5,610.0)								(5,610.0)				(4,878.8)
Reconciling Adjustments [Member] | AEP Transmission Co [Member] | Related Party
Reportable Segment Information
Revenue from Contracts with Customers		0.0				0.0				0.0		0.0
Vertically Integrated Utilities [Member]
Reportable Segment Information
Revenues		3,205.4				3,226.3				8,737.7		8,562.2
Net Income (Loss)		514.0				476.9				1,054.6		1,079.4
Balance Sheet Information
Total Assets		50,940.3								50,940.3				49,761.8
Vertically Integrated Utilities [Member] | Related Party
Reportable Segment Information
Revenue from Contracts with Customers		47.3				51.7				134.3		145.8
Vertically Integrated Utilities [Member] | Vertically Integrated Utilities [Member]
Reportable Segment Information
Revenue from Contracts with Customers		3,158.1				3,174.6				8,603.4		8,416.4
Vertically Integrated Utilities [Member] | Other Revenues [Member]
Reportable Segment Information
Revenues		2.2	[2]			0.2	[3],[4]			2.2	[5],[6]	0.3	[7],[8]
Transmission And Distribution Utilities [Member]
Reportable Segment Information
Revenues		1,544.1				1,530.2				4,348.5		4,078.6
Net Income (Loss)		206.0				165.5				508.4		483.1
Balance Sheet Information
Total Assets		24,327.9								24,327.9				22,920.2
Transmission And Distribution Utilities [Member] | Related Party
Reportable Segment Information
Revenue from Contracts with Customers		8.9				4.7				27.2		14.1
Transmission And Distribution Utilities [Member] | Transmission and Distribution Utilities Revenues [Member]
Reportable Segment Information
Revenue from Contracts with Customers		1,535.2				1,525.5				4,321.3		4,064.5
Transmission And Distribution Utilities [Member] | Other Revenues [Member]
Reportable Segment Information
Revenues		2.8	[2]			5.5	[3],[4]			20.0	[5],[6]	18.6	[7],[8]
AEP Transmission Holdco [Member]
Reportable Segment Information
Revenues		476.7				430.9				1,390.8		1,221.1
Net Income (Loss)		203.9				171.4				583.6		487.8
Balance Sheet Information
Total Assets		16,155.0								16,155.0				15,215.8
AEP Transmission Holdco [Member] | Related Party
Reportable Segment Information
Revenue from Contracts with Customers		382.7				349.0				1,118.4		976.7
AEP Transmission Holdco [Member] | Transmission [Member]
Reportable Segment Information
Revenue from Contracts with Customers		94.0				81.9				272.4		244.4
Generation And Marketing [Member]
Reportable Segment Information
Revenues		566.7				735.4				1,225.1		2,014.3
Net Income (Loss)		132.8				96.2				(62.2)		278.1
Balance Sheet Information
Total Assets		2,517.0								2,517.0				4,520.1
Generation And Marketing [Member] | Related Party
Reportable Segment Information
Revenue from Contracts with Customers		39.2				2.3				52.5		17.3
Generation And Marketing [Member] | Generation and Marketing Revenues [Member]
Reportable Segment Information
Revenue from Contracts with Customers		527.5				733.1				1,172.6		1,997.0
Generation And Marketing [Member] | Other Revenues [Member]
Reportable Segment Information
Revenues		3.4	[2],[15]			122.8	[3],[4]			(272.8)	[5],[6]	410.5	[7],[8]
All Other [Member]
Reportable Segment Information
Revenues	[16]	57.2				28.3				119.3		72.7
Net Income (Loss)	[16]	(98.4)				(226.7)				(209.6)		(406.2)
Balance Sheet Information
Total Assets	[16],[17]	4,567.2								4,567.2				6,768.4
All Other [Member] | Related Party
Reportable Segment Information
Revenue from Contracts with Customers	[16]	30.3				17.3				83.9		36.6
All Other [Member] | Other Revenues [Member]
Reportable Segment Information
Revenue from Contracts with Customers	[16]	26.9				11.0				35.4		36.1
Revenues		0.8	[2]			1.8	[3],[4]			4.0	[5],[6]	6.9	[7],[8]
State Transcos [Member] | AEP Transmission Co [Member]
Reportable Segment Information
Revenues		462.7				418.5				1,349.2		1,183.3
Net Income (Loss)		178.2				152.6				514.0		426.4
Balance Sheet Information
Total Assets		14,760.8								14,760.8				13,875.6
State Transcos [Member] | AEP Transmission Co [Member] | Related Party
Reportable Segment Information
Revenue from Contracts with Customers		369.9				331.3				1,080.0		933.8
State Transcos [Member] | AEP Transmission Co [Member] | Transmission [Member]
Reportable Segment Information
Revenue from Contracts with Customers		92.8				87.2				269.2		249.5
AEPTCo Parent [Member] | AEP Transmission Co [Member]
Reportable Segment Information
Revenue from Contracts with Customers		0.0				0.0				0.0		0.0
Revenues		0.0				0.0				0.0		0.0
Net Income (Loss)	[18]	1.0				0.1				3.6		0.2
Balance Sheet Information
Total Assets	[19]	5,561.2								5,561.2				$ 4,817.4
AEPTCo Parent [Member] | AEP Transmission Co [Member] | Related Party
Reportable Segment Information
Revenue from Contracts with Customers		$ 0.0				$ 0.0				$ 0.0		$ 0.0

[1] Amounts reclassified to the referenced line item on the statements of income.

[2] Amounts include affiliated and nonaffiliated revenues.

[3] Amounts include affiliated and nonaffiliated revenues

[4] Generation & Marketing includes economic hedge activity.

[5] Amounts include affiliated and nonaffiliated revenues.

[6] Generation & Marketing includes economic hedge activity.

[7] Amounts include affiliated and nonaffiliated revenues

[8] Generation & Marketing includes economic hedge activity.

[9] Amounts include affiliated and nonaffiliated revenues.

[10] Amounts include affiliated and nonaffiliated revenues.

[11] Amounts include affiliated and nonaffiliated revenues.

[12] Amounts include affiliated and nonaffiliated revenues.

[13] Reconciling Adjustments for Total Assets primarily include elimination of intercompany advances to affiliates and intercompany accounts receivable.

[14] Primarily relates to the elimination of Notes Receivable from the State Transcos.

[15] Generation & Marketing includes economic hedge activity.

[16] Corporate and Other primarily includes the purchasing of receivables from certain AEP utility subsidiaries. This segment also includes Parent’s guarantee revenue received from affiliates, investment income, interest income, interest expense and other nonallocated costs.

[17] Includes elimination of AEP Parent’s investments in wholly-owned subsidiary companies.

[18] Includes the elimination of AEPTCo Parent’s equity earnings in the State Transcos.

[19] Primarily relates to Notes Receivable from the State Transcos.

XML

Derivatives and Hedging (Details) gal in Millions, MWh in Millions, MMBTU in Millions		3 Months Ended			9 Months Ended			12 Months Ended
		Sep. 30, 2023 USD ($) MWh MMBTU gal		Sep. 30, 2022 USD ($)	Sep. 30, 2023 USD ($) MWh MMBTU gal		Sep. 30, 2022 USD ($)	Dec. 31, 2022 USD ($) MMBTU MWh gal
Cash Collateral Netting
Cash Collateral Received Netted Against Risk Management Assets		$ 93,000,000			$ 93,000,000			$ 481,000,000
Fair Value of Derivative Instruments
Current Risk Management Assets		262,700,000			262,700,000			348,800,000
Long-term Risk Management Assets		290,200,000			290,200,000			284,100,000
Total Assets		552,900,000			552,900,000			632,900,000
Current Risk Management Liabilities		151,500,000			151,500,000			145,200,000
Long-term Risk Management Liabilities		278,400,000			278,400,000			345,200,000
Total Liabilities		429,900,000			429,900,000			490,400,000
Amount of Gain (Loss) Recognized on Risk Management Contracts
Amount of Gain (Loss) Recognized on Risk Management Contracts		33,100,000		$ 230,600,000	(179,400,000)		$ 703,800,000
Carrying Amount of Hedged Asset (Liability)	[1],[2]	(840,100,000)			(840,100,000)			(855,500,000)
Cumulative Fair Value Hedging Adjustment in the Carrying Amount of the Hedged Asset (Liability)	[1],[2]	106,100,000			106,100,000			89,700,000
Gain (Loss) on Hedging Instruments
Gain (Loss) on Fair Value Hedging Instruments	[3]	(13,400,000)		(36,000,000.0)	(10,700,000)		(98,400,000)
Gain (Loss) on Fair Value Portion of Long Term Debt	[3]	13,400,000		36,000,000.0	10,700,000		98,400,000
Collateral Triggering Events [Abstract]
Fair Value Of Derivative Liabilities Subject To Cross Acceleration Provisions		138,000,000			138,000,000			127,000,000
Fair Value Of Derivative Liabilities Subject To Cross Default Provisions		165,000,000			165,000,000			217,000,000
Derivatives and Hedging (Textuals) [Abstract]
Hedged Liability, Discontinued Fair Value Hedge, Cumulative Increase (Decrease)		(32,000,000)			(32,000,000)			(38,000,000)
Credit Downgrade Trigger Exposure		0			0			2,000,000
AEP Texas Inc. [Member]
Amount of Gain (Loss) Recognized on Risk Management Contracts
Amount of Gain (Loss) Recognized on Risk Management Contracts		800,000		(600,000)	200,000		2,000,000.0
Appalachian Power Co [Member]
Fair Value of Derivative Instruments
Current Risk Management Assets		46,400,000			46,400,000			69,100,000
Current Risk Management Liabilities		1,800,000			1,800,000			3,600,000
Amount of Gain (Loss) Recognized on Risk Management Contracts
Amount of Gain (Loss) Recognized on Risk Management Contracts		13,300,000		61,200,000	5,200,000		84,300,000
Indiana Michigan Power Co [Member]
Fair Value of Derivative Instruments
Current Risk Management Assets		15,800,000			15,800,000			15,200,000
Amount of Gain (Loss) Recognized on Risk Management Contracts
Amount of Gain (Loss) Recognized on Risk Management Contracts		(6,300,000)		6,200,000	8,200,000		8,600,000
Ohio Power Co [Member]
Fair Value of Derivative Instruments
Current Risk Management Liabilities		5,700,000			5,700,000			1,800,000
Long-term Risk Management Liabilities		45,900,000			45,900,000			37,900,000
Amount of Gain (Loss) Recognized on Risk Management Contracts
Amount of Gain (Loss) Recognized on Risk Management Contracts		400,000		5,600,000	(24,700,000)		53,000,000.0
Public Service Co Of Oklahoma [Member]
Fair Value of Derivative Instruments
Current Risk Management Assets		28,200,000			28,200,000			25,300,000
Amount of Gain (Loss) Recognized on Risk Management Contracts
Amount of Gain (Loss) Recognized on Risk Management Contracts		9,300,000		20,100,000	66,200,000		76,200,000
Southwestern Electric Power Co [Member]
Fair Value of Derivative Instruments
Current Risk Management Assets		17,100,000			17,100,000			16,400,000
Amount of Gain (Loss) Recognized on Risk Management Contracts
Amount of Gain (Loss) Recognized on Risk Management Contracts		11,500,000		7,600,000	54,600,000		64,100,000
Risk Management Contracts [Member]
Fair Value of Derivative Instruments
Total Assets	[4]	424,500,000	[5]		424,500,000	[5]		315,400,000	[6]
Total Liabilities	[4]	291,200,000	[5]		291,200,000	[5]		339,800,000	[6]
Risk Management Contracts [Member] | AEP Texas Inc. [Member]
Fair Value of Derivative Instruments
Total Assets	[7]	400,000			400,000
Risk Management Contracts [Member] | Appalachian Power Co [Member]
Fair Value of Derivative Instruments
Total Assets	[4],[7]	46,600,000			46,600,000			69,100,000
Total Liabilities	[4],[7]	2,700,000			2,700,000			3,500,000
Risk Management Contracts [Member] | Indiana Michigan Power Co [Member]
Fair Value of Derivative Instruments
Total Assets	[4],[7]	21,200,000			21,200,000			15,400,000
Total Liabilities	[4],[7]	1,100,000			1,100,000			0
Risk Management Contracts [Member] | Ohio Power Co [Member]
Fair Value of Derivative Instruments
Total Assets	[7]	300,000			300,000
Total Liabilities	[7]	51,600,000			51,600,000			39,700,000
Risk Management Contracts [Member] | Public Service Co Of Oklahoma [Member]
Fair Value of Derivative Instruments
Total Assets	[4],[7]	28,200,000			28,200,000			25,300,000
Total Liabilities	[4],[7]	7,200,000			7,200,000			1,600,000
Risk Management Contracts [Member] | Southwestern Electric Power Co [Member]
Fair Value of Derivative Instruments
Total Assets	[4],[7]	17,100,000			17,100,000			16,400,000
Total Liabilities	[4],[7]	3,500,000			3,500,000			1,400,000
Commodity [Member]
Impact of Cash Flow Hedges on the Condensed Balance Sheet
AOCI Gain (Loss) Net of Tax		100,600,000			100,600,000			223,500,000
Portion Expected to be Reclassified to Net Income During the Next Twelve Months					$ 36,100,000			119,900,000
Derivatives and Hedging (Textuals) [Abstract]
Maximum Term for Exposure to Variability of Future Cash Flows					90 months
Cross Acceleration Provisions Maximum Third Party Obligation Amount		50,000,000			$ 50,000,000
Cross Default Provisions Maximum Third Party Obligation Amount		50,000,000			50,000,000
Commodity [Member] | Risk Management Contracts [Member]
Fair Value of Derivative Instruments
Current Risk Management Assets	[8]	595,700,000			595,700,000			965,400,000
Long-term Risk Management Assets	[8]	465,300,000			465,300,000			565,600,000
Total Assets	[8]	1,061,000,000			1,061,000,000			1,531,000,000
Current Risk Management Liabilities	[8]	460,300,000			460,300,000			663,800,000
Long-term Risk Management Liabilities	[8]	374,800,000			374,800,000			412,000,000.0
Total Liabilities	[8]	835,100,000			835,100,000			1,075,800,000
Total MTM Derivative Contract Net Assets (Liabilities)	[8]	225,900,000			225,900,000			455,200,000
Commodity [Member] | Risk Management Contracts [Member] | AEP Texas Inc. [Member]
Fair Value of Derivative Instruments
Current Risk Management Assets	[8]	400,000			400,000			0
Long-term Risk Management Assets	[8]	0			0			0
Total Assets	[8]	400,000			400,000			0
Current Risk Management Liabilities	[8]	0			0			0
Long-term Risk Management Liabilities	[8]	0			0			0
Total Liabilities	[8]	0			0			0
Total MTM Derivative Contract Net Assets (Liabilities)	[8]	400,000			400,000			0
Commodity [Member] | Risk Management Contracts [Member] | Appalachian Power Co [Member]
Fair Value of Derivative Instruments
Current Risk Management Assets	[8]	48,800,000			48,800,000			69,300,000
Long-term Risk Management Assets	[8]	800,000			800,000			700,000
Total Assets	[8]	49,600,000			49,600,000			70,000,000.0
Current Risk Management Liabilities	[8]	4,200,000			4,200,000			4,100,000
Long-term Risk Management Liabilities	[8]	1,500,000			1,500,000			700,000
Total Liabilities	[8]	5,700,000			5,700,000			4,800,000
Total MTM Derivative Contract Net Assets (Liabilities)	[8]	43,900,000			43,900,000			65,200,000
Commodity [Member] | Risk Management Contracts [Member] | Indiana Michigan Power Co [Member]
Fair Value of Derivative Instruments
Current Risk Management Assets	[8]	20,200,000			20,200,000			16,000,000.0
Long-term Risk Management Assets	[8]	6,600,000			6,600,000			500,000
Total Assets	[8]	26,800,000			26,800,000			16,500,000
Current Risk Management Liabilities	[8]	5,300,000			5,300,000			900,000
Long-term Risk Management Liabilities	[8]	1,000,000.0			1,000,000.0			300,000
Total Liabilities	[8]	6,300,000			6,300,000			1,200,000
Total MTM Derivative Contract Net Assets (Liabilities)	[8]	20,500,000			20,500,000			15,300,000
Commodity [Member] | Risk Management Contracts [Member] | Ohio Power Co [Member]
Fair Value of Derivative Instruments
Current Risk Management Assets	[8]	300,000			300,000			0
Long-term Risk Management Assets	[8]	0			0			0
Total Assets	[8]	300,000			300,000			0
Current Risk Management Liabilities	[8]	5,700,000			5,700,000			2,100,000
Long-term Risk Management Liabilities	[8]	45,900,000			45,900,000			37,900,000
Total Liabilities	[8]	51,600,000			51,600,000			40,000,000.0
Total MTM Derivative Contract Net Assets (Liabilities)	[8]	(51,300,000)			(51,300,000)			(40,000,000.0)
Commodity [Member] | Risk Management Contracts [Member] | Public Service Co Of Oklahoma [Member]
Fair Value of Derivative Instruments
Current Risk Management Assets	[8]	28,300,000			28,300,000			24,100,000
Long-term Risk Management Assets	[8]	300,000			300,000			0
Total Assets	[8]	28,600,000			28,600,000			24,100,000
Current Risk Management Liabilities	[8]	7,200,000			7,200,000			2,100,000
Long-term Risk Management Liabilities	[8]	400,000			400,000			0
Total Liabilities	[8]	7,600,000			7,600,000			2,100,000
Total MTM Derivative Contract Net Assets (Liabilities)	[8]	21,000,000.0			21,000,000.0			22,000,000.0
Commodity [Member] | Risk Management Contracts [Member] | Southwestern Electric Power Co [Member]
Fair Value of Derivative Instruments
Current Risk Management Assets	[8]	17,600,000			17,600,000			16,800,000
Long-term Risk Management Assets	[8]	0			0			0
Total Assets	[8]	17,600,000			17,600,000			16,800,000
Current Risk Management Liabilities	[8]	3,600,000			3,600,000			2,000,000.0
Long-term Risk Management Liabilities	[8]	400,000			400,000			0
Total Liabilities	[8]	4,000,000.0			4,000,000.0			2,000,000.0
Total MTM Derivative Contract Net Assets (Liabilities)	[8]	13,600,000			13,600,000			14,800,000
Commodity [Member] | Hedging Contracts [Member]
Fair Value of Derivative Instruments
Current Risk Management Assets	[8]	55,600,000			55,600,000			212,200,000
Long-term Risk Management Assets	[8]	83,300,000			83,300,000			148,900,000
Total Assets	[8]	138,900,000			138,900,000			361,100,000
Current Risk Management Liabilities	[8]	9,900,000			9,900,000			60,400,000
Long-term Risk Management Liabilities	[8]	1,200,000			1,200,000			17,400,000
Total Liabilities	[8]	11,100,000			11,100,000			77,800,000
Total MTM Derivative Contract Net Assets (Liabilities)	[8]	127,800,000			127,800,000			283,300,000
Interest Rate [Member]
Commodity:
Derivative, Notional Amount		950,000,000.0			950,000,000.0			1,650,000,000
Impact of Cash Flow Hedges on the Condensed Balance Sheet
AOCI Gain (Loss) Net of Tax		4,700,000			4,700,000			300,000
Portion Expected to be Reclassified to Net Income During the Next Twelve Months					4,300,000			300,000
Interest Rate [Member] | AEP Texas Inc. [Member]
Commodity:
Derivative, Notional Amount		0			0			0
Impact of Cash Flow Hedges on the Condensed Balance Sheet
AOCI Gain (Loss) Net of Tax		2,800,000			2,800,000			(300,000)
Portion Expected to be Reclassified to Net Income During the Next Twelve Months					300,000			(200,000)
Interest Rate [Member] | Appalachian Power Co [Member]
Commodity:
Derivative, Notional Amount		0			0			0
Impact of Cash Flow Hedges on the Condensed Balance Sheet
AOCI Gain (Loss) Net of Tax		6,100,000			6,100,000			6,700,000
Portion Expected to be Reclassified to Net Income During the Next Twelve Months					800,000			800,000
Interest Rate [Member] | Indiana Michigan Power Co [Member]
Commodity:
Derivative, Notional Amount		0			0			0
Impact of Cash Flow Hedges on the Condensed Balance Sheet
AOCI Gain (Loss) Net of Tax		(5,600,000)			(5,600,000)			(5,100,000)
Portion Expected to be Reclassified to Net Income During the Next Twelve Months					(400,000)			(600,000)
Interest Rate [Member] | Ohio Power Co [Member]
Commodity:
Derivative, Notional Amount		0			0			0
Interest Rate [Member] | Public Service Co Of Oklahoma [Member]
Commodity:
Derivative, Notional Amount		0			0			200,000,000.0
Impact of Cash Flow Hedges on the Condensed Balance Sheet
AOCI Gain (Loss) Net of Tax		(200,000)			(200,000)			1,300,000
Portion Expected to be Reclassified to Net Income During the Next Twelve Months					0			100,000
Interest Rate [Member] | Southwestern Electric Power Co [Member]
Commodity:
Derivative, Notional Amount		0			0			0
Impact of Cash Flow Hedges on the Condensed Balance Sheet
AOCI Gain (Loss) Net of Tax		1,400,000			1,400,000			1,100,000
Portion Expected to be Reclassified to Net Income During the Next Twelve Months					300,000			200,000
Interest Rate [Member] | Hedging Contracts [Member]
Fair Value of Derivative Instruments
Current Risk Management Assets	[8]	0			0			1,800,000
Long-term Risk Management Assets	[8]	0			0			14,300,000
Total Assets	[8]	0			0			16,100,000
Current Risk Management Liabilities	[8]	43,200,000			43,200,000			41,400,000
Long-term Risk Management Liabilities	[8]	94,900,000			94,900,000			91,100,000
Total Liabilities	[8]	138,100,000			138,100,000			132,500,000
Total MTM Derivative Contract Net Assets (Liabilities)	[8]	(138,100,000)			(138,100,000)			(116,400,000)
Interest Rate [Member] | Hedging Contracts [Member] | Public Service Co Of Oklahoma [Member]
Fair Value of Derivative Instruments
Current Risk Management Assets	[8]							1,600,000
Long-term Risk Management Assets	[8]							0
Total Assets	[8]							1,600,000
Current Risk Management Liabilities	[8]							0
Long-term Risk Management Liabilities	[8]							0
Total Liabilities	[8]							0
Total MTM Derivative Contract Net Assets (Liabilities)	[8]							1,600,000
Gross Amounts of Risk Management Assets/Liabilities Recognized [Member]
Fair Value of Derivative Instruments
Current Risk Management Assets		651,300,000			651,300,000			1,179,400,000
Long-term Risk Management Assets		548,600,000			548,600,000			728,800,000
Total Assets		1,199,900,000			1,199,900,000			1,908,200,000
Current Risk Management Liabilities		513,400,000			513,400,000			765,600,000
Long-term Risk Management Liabilities		470,900,000			470,900,000			520,500,000
Total Liabilities		984,300,000			984,300,000			1,286,100,000
Total MTM Derivative Contract Net Assets (Liabilities)		215,600,000			215,600,000			622,100,000
Gross Amounts of Risk Management Assets/Liabilities Recognized [Member] | Public Service Co Of Oklahoma [Member]
Fair Value of Derivative Instruments
Current Risk Management Assets								25,700,000
Long-term Risk Management Assets								0
Total Assets								25,700,000
Current Risk Management Liabilities								2,100,000
Long-term Risk Management Liabilities								0
Total Liabilities								2,100,000
Total MTM Derivative Contract Net Assets (Liabilities)								23,600,000
Gross Amounts Offset in the Statement of Financial Position [Member]
Fair Value of Derivative Instruments
Current Risk Management Assets	[9]	(388,600,000)			(388,600,000)			(830,600,000)
Long-term Risk Management Assets	[9]	(258,400,000)			(258,400,000)			(444,700,000)
Total Assets	[9]	(647,000,000.0)			(647,000,000.0)			(1,275,300,000)
Current Risk Management Liabilities	[9]	(361,900,000)			(361,900,000)			(620,400,000)
Long-term Risk Management Liabilities	[9]	(192,500,000)			(192,500,000)			(175,300,000)
Total Liabilities	[9]	(554,400,000)			(554,400,000)			(795,700,000)
Total MTM Derivative Contract Net Assets (Liabilities)	[9]	(92,600,000)			(92,600,000)			(479,600,000)
Gross Amounts Offset in the Statement of Financial Position [Member] | AEP Texas Inc. [Member]
Fair Value of Derivative Instruments
Current Risk Management Assets	[9]	0			0			0
Long-term Risk Management Assets	[9]	0			0			0
Total Assets	[9]	0			0			0
Current Risk Management Liabilities	[9]	0			0			0
Long-term Risk Management Liabilities	[9]	0			0			0
Total Liabilities	[9]	0			0			0
Total MTM Derivative Contract Net Assets (Liabilities)	[9]	0			0			0
Gross Amounts Offset in the Statement of Financial Position [Member] | Appalachian Power Co [Member]
Fair Value of Derivative Instruments
Current Risk Management Assets	[9]	(2,400,000)			(2,400,000)			(200,000)
Long-term Risk Management Assets	[9]	(600,000)			(600,000)			(700,000)
Total Assets	[9]	(3,000,000.0)			(3,000,000.0)			(900,000)
Current Risk Management Liabilities	[9]	(2,400,000)			(2,400,000)			(500,000)
Long-term Risk Management Liabilities	[9]	(600,000)			(600,000)			(600,000)
Total Liabilities	[9]	(3,000,000.0)			(3,000,000.0)			(1,100,000)
Total MTM Derivative Contract Net Assets (Liabilities)	[9]	0			0			200,000
Gross Amounts Offset in the Statement of Financial Position [Member] | Indiana Michigan Power Co [Member]
Fair Value of Derivative Instruments
Current Risk Management Assets	[9]	(4,400,000)			(4,400,000)			(800,000)
Long-term Risk Management Assets	[9]	(1,200,000)			(1,200,000)			(300,000)
Total Assets	[9]	(5,600,000)			(5,600,000)			(1,100,000)
Current Risk Management Liabilities	[9]	(4,200,000)			(4,200,000)			(900,000)
Long-term Risk Management Liabilities	[9]	(1,000,000.0)			(1,000,000.0)			(300,000)
Total Liabilities	[9]	(5,200,000)			(5,200,000)			(1,200,000)
Total MTM Derivative Contract Net Assets (Liabilities)	[9]	(400,000)			(400,000)			100,000
Gross Amounts Offset in the Statement of Financial Position [Member] | Ohio Power Co [Member]
Fair Value of Derivative Instruments
Current Risk Management Assets	[9]	0			0			0
Long-term Risk Management Assets	[9]	0			0			0
Total Assets	[9]	0			0			0
Current Risk Management Liabilities	[9]	0			0			(300,000)
Long-term Risk Management Liabilities	[9]	0			0			0
Total Liabilities	[9]	0			0			(300,000)
Total MTM Derivative Contract Net Assets (Liabilities)	[9]	0			0			300,000
Gross Amounts Offset in the Statement of Financial Position [Member] | Public Service Co Of Oklahoma [Member]
Fair Value of Derivative Instruments
Current Risk Management Assets	[9]	(100,000)			(100,000)			(400,000)
Long-term Risk Management Assets	[9]	(300,000)			(300,000)			0
Total Assets	[9]	(400,000)			(400,000)			(400,000)
Current Risk Management Liabilities	[9]	(100,000)			(100,000)			(500,000)
Long-term Risk Management Liabilities	[9]	(300,000)			(300,000)			0
Total Liabilities	[9]	(400,000)			(400,000)			(500,000)
Total MTM Derivative Contract Net Assets (Liabilities)	[9]	0			0			100,000
Gross Amounts Offset in the Statement of Financial Position [Member] | Southwestern Electric Power Co [Member]
Fair Value of Derivative Instruments
Current Risk Management Assets	[9]	(500,000)			(500,000)			(400,000)
Long-term Risk Management Assets	[9]	0			0			0
Total Assets	[9]	(500,000)			(500,000)			(400,000)
Current Risk Management Liabilities	[9]	(500,000)			(500,000)			(600,000)
Long-term Risk Management Liabilities	[9]	0			0			0
Total Liabilities	[9]	(500,000)			(500,000)			(600,000)
Total MTM Derivative Contract Net Assets (Liabilities)	[9]	0			0			200,000
Net Amounts of Assets/Liabilities Presented in the Statement of Financial Position [Member]
Fair Value of Derivative Instruments
Current Risk Management Assets	[10]	262,700,000			262,700,000			348,800,000
Long-term Risk Management Assets	[10]	290,200,000			290,200,000			284,100,000
Total Assets	[10]	552,900,000			552,900,000			632,900,000
Current Risk Management Liabilities	[10]	151,500,000			151,500,000			145,200,000
Long-term Risk Management Liabilities	[10]	278,400,000			278,400,000			345,200,000
Total Liabilities	[10]	429,900,000			429,900,000			490,400,000
Total MTM Derivative Contract Net Assets (Liabilities)	[10]	123,000,000.0			123,000,000.0			142,500,000
Net Amounts of Assets/Liabilities Presented in the Statement of Financial Position [Member] | AEP Texas Inc. [Member]
Fair Value of Derivative Instruments
Current Risk Management Assets	[10]	400,000			400,000			0
Long-term Risk Management Assets	[10]	0			0			0
Total Assets	[10]	400,000			400,000			0
Current Risk Management Liabilities	[10]	0			0			0
Long-term Risk Management Liabilities	[10]	0			0			0
Total Liabilities	[10]	0			0			0
Total MTM Derivative Contract Net Assets (Liabilities)	[10]	400,000			400,000			0
Net Amounts of Assets/Liabilities Presented in the Statement of Financial Position [Member] | Appalachian Power Co [Member]
Fair Value of Derivative Instruments
Current Risk Management Assets	[10]	46,400,000			46,400,000			69,100,000
Long-term Risk Management Assets	[10]	200,000			200,000			0
Total Assets	[10]	46,600,000			46,600,000			69,100,000
Current Risk Management Liabilities	[10]	1,800,000			1,800,000			3,600,000
Long-term Risk Management Liabilities	[10]	900,000			900,000			100,000
Total Liabilities	[10]	2,700,000			2,700,000			3,700,000
Total MTM Derivative Contract Net Assets (Liabilities)	[10]	43,900,000			43,900,000			65,400,000
Net Amounts of Assets/Liabilities Presented in the Statement of Financial Position [Member] | Indiana Michigan Power Co [Member]
Fair Value of Derivative Instruments
Current Risk Management Assets	[10]	15,800,000			15,800,000			15,200,000
Long-term Risk Management Assets	[10]	5,400,000			5,400,000			200,000
Total Assets	[10]	21,200,000			21,200,000			15,400,000
Current Risk Management Liabilities	[10]	1,100,000			1,100,000			0
Long-term Risk Management Liabilities	[10]	0			0			0
Total Liabilities	[10]	1,100,000			1,100,000			0
Total MTM Derivative Contract Net Assets (Liabilities)	[10]	20,100,000			20,100,000			15,400,000
Net Amounts of Assets/Liabilities Presented in the Statement of Financial Position [Member] | Ohio Power Co [Member]
Fair Value of Derivative Instruments
Current Risk Management Assets	[10]	300,000			300,000			0
Long-term Risk Management Assets	[10]	0			0			0
Total Assets	[10]	300,000			300,000			0
Current Risk Management Liabilities	[10]	5,700,000			5,700,000			1,800,000
Long-term Risk Management Liabilities	[10]	45,900,000			45,900,000			37,900,000
Total Liabilities	[10]	51,600,000			51,600,000			39,700,000
Total MTM Derivative Contract Net Assets (Liabilities)	[10]	(51,300,000)			(51,300,000)			(39,700,000)
Net Amounts of Assets/Liabilities Presented in the Statement of Financial Position [Member] | Public Service Co Of Oklahoma [Member]
Fair Value of Derivative Instruments
Current Risk Management Assets	[10]	28,200,000			28,200,000			25,300,000
Long-term Risk Management Assets	[10]	0			0			0
Total Assets	[10]	28,200,000			28,200,000			25,300,000
Current Risk Management Liabilities	[10]	7,100,000			7,100,000			1,600,000
Long-term Risk Management Liabilities	[10]	100,000			100,000			0
Total Liabilities	[10]	7,200,000			7,200,000			1,600,000
Total MTM Derivative Contract Net Assets (Liabilities)	[10]	21,000,000.0			21,000,000.0			23,700,000
Net Amounts of Assets/Liabilities Presented in the Statement of Financial Position [Member] | Southwestern Electric Power Co [Member]
Fair Value of Derivative Instruments
Current Risk Management Assets	[10]	17,100,000			17,100,000			16,400,000
Long-term Risk Management Assets	[10]	0			0			0
Total Assets	[10]	17,100,000			17,100,000			16,400,000
Current Risk Management Liabilities	[10]	3,100,000			3,100,000			1,400,000
Long-term Risk Management Liabilities	[10]	400,000			400,000			0
Total Liabilities	[10]	3,500,000			3,500,000			1,400,000
Total MTM Derivative Contract Net Assets (Liabilities)	[10]	$ 13,600,000			$ 13,600,000			$ 15,000,000.0
Power [Member]
Commodity:
Derivative, Energy Notional Amount | MWh		262.3			262.3			226.8
Power [Member] | AEP Texas Inc. [Member]
Commodity:
Derivative, Energy Notional Amount | MWh		0.0			0.0			0.0
Power [Member] | Appalachian Power Co [Member]
Commodity:
Derivative, Energy Notional Amount | MWh		28.4			28.4			17.9
Power [Member] | Indiana Michigan Power Co [Member]
Commodity:
Derivative, Energy Notional Amount | MWh		9.0			9.0			4.2
Power [Member] | Ohio Power Co [Member]
Commodity:
Derivative, Energy Notional Amount | MWh		2.3			2.3			2.5
Power [Member] | Public Service Co Of Oklahoma [Member]
Commodity:
Derivative, Energy Notional Amount | MWh		5.6			5.6			2.9
Power [Member] | Southwestern Electric Power Co [Member]
Commodity:
Derivative, Energy Notional Amount | MWh		4.4			4.4			2.2
Natural Gas [Member]
Commodity:
Derivative, Energy Notional Amount | MMBTU		149.8			149.8			77.1
Natural Gas [Member] | AEP Texas Inc. [Member]
Commodity:
Derivative, Energy Notional Amount | MMBTU		0.0			0.0			0.0
Natural Gas [Member] | Appalachian Power Co [Member]
Commodity:
Derivative, Energy Notional Amount | MMBTU		27.3			27.3			1.9
Natural Gas [Member] | Indiana Michigan Power Co [Member]
Commodity:
Derivative, Energy Notional Amount | MMBTU		0.0			0.0			0.0
Natural Gas [Member] | Ohio Power Co [Member]
Commodity:
Derivative, Energy Notional Amount | MMBTU		0.0			0.0			0.0
Natural Gas [Member] | Public Service Co Of Oklahoma [Member]
Commodity:
Derivative, Energy Notional Amount | MMBTU		25.3			25.3			1.9
Natural Gas [Member] | Southwestern Electric Power Co [Member]
Commodity:
Derivative, Energy Notional Amount | MMBTU		13.1			13.1			2.1
Heating Oil and Gasoline [Member]
Commodity:
Derivative, Volume Notional Amount | gal		8.3			8.3			6.9
Heating Oil and Gasoline [Member] | AEP Texas Inc. [Member]
Commodity:
Derivative, Volume Notional Amount | gal		2.2			2.2			1.9
Heating Oil and Gasoline [Member] | Appalachian Power Co [Member]
Commodity:
Derivative, Volume Notional Amount | gal		1.3			1.3			1.0
Heating Oil and Gasoline [Member] | Indiana Michigan Power Co [Member]
Commodity:
Derivative, Volume Notional Amount | gal		0.8			0.8			0.7
Heating Oil and Gasoline [Member] | Ohio Power Co [Member]
Commodity:
Derivative, Volume Notional Amount | gal		1.7			1.7			1.4
Heating Oil and Gasoline [Member] | Public Service Co Of Oklahoma [Member]
Commodity:
Derivative, Volume Notional Amount | gal		1.1			1.1			0.9
Heating Oil and Gasoline [Member] | Southwestern Electric Power Co [Member]
Commodity:
Derivative, Volume Notional Amount | gal		1.2			1.2			1.0
Interest Rate Contract [Member]
Commodity:
Derivative, Notional Amount		$ 80,100,000			$ 80,100,000			$ 99,900,000
Interest Rate Contract [Member] | AEP Texas Inc. [Member]
Commodity:
Derivative, Notional Amount		0			0			0
Interest Rate Contract [Member] | Appalachian Power Co [Member]
Commodity:
Derivative, Notional Amount		0			0			0
Interest Rate Contract [Member] | Indiana Michigan Power Co [Member]
Commodity:
Derivative, Notional Amount		0			0			0
Interest Rate Contract [Member] | Ohio Power Co [Member]
Commodity:
Derivative, Notional Amount		0			0			0
Interest Rate Contract [Member] | Public Service Co Of Oklahoma [Member]
Commodity:
Derivative, Notional Amount		0			0			0
Interest Rate Contract [Member] | Southwestern Electric Power Co [Member]
Commodity:
Derivative, Notional Amount		0			0			$ 0
Vertically Integrated Utilities Revenues [Member]
Amount of Gain (Loss) Recognized on Risk Management Contracts
Amount of Gain (Loss) Recognized on Risk Management Contracts		(9,500,000)		2,100,000	2,200,000		2,200,000
Vertically Integrated Utilities Revenues [Member] | AEP Texas Inc. [Member]
Amount of Gain (Loss) Recognized on Risk Management Contracts
Amount of Gain (Loss) Recognized on Risk Management Contracts		0		0	0		0
Vertically Integrated Utilities Revenues [Member] | Appalachian Power Co [Member]
Amount of Gain (Loss) Recognized on Risk Management Contracts
Amount of Gain (Loss) Recognized on Risk Management Contracts		0		0	0		0
Vertically Integrated Utilities Revenues [Member] | Indiana Michigan Power Co [Member]
Amount of Gain (Loss) Recognized on Risk Management Contracts
Amount of Gain (Loss) Recognized on Risk Management Contracts		0		0	0		0
Vertically Integrated Utilities Revenues [Member] | Ohio Power Co [Member]
Amount of Gain (Loss) Recognized on Risk Management Contracts
Amount of Gain (Loss) Recognized on Risk Management Contracts		0		0	0		0
Vertically Integrated Utilities Revenues [Member] | Public Service Co Of Oklahoma [Member]
Amount of Gain (Loss) Recognized on Risk Management Contracts
Amount of Gain (Loss) Recognized on Risk Management Contracts		0		0	0		0
Vertically Integrated Utilities Revenues [Member] | Southwestern Electric Power Co [Member]
Amount of Gain (Loss) Recognized on Risk Management Contracts
Amount of Gain (Loss) Recognized on Risk Management Contracts		0		0	0		0
Generation and Marketing Revenues [Member]
Amount of Gain (Loss) Recognized on Risk Management Contracts
Amount of Gain (Loss) Recognized on Risk Management Contracts		(1,400,000)		116,700,000	(290,600,000)		390,000,000.0
Generation and Marketing Revenues [Member] | AEP Texas Inc. [Member]
Amount of Gain (Loss) Recognized on Risk Management Contracts
Amount of Gain (Loss) Recognized on Risk Management Contracts		0		0	0		0
Generation and Marketing Revenues [Member] | Appalachian Power Co [Member]
Amount of Gain (Loss) Recognized on Risk Management Contracts
Amount of Gain (Loss) Recognized on Risk Management Contracts		0		0	0		0
Generation and Marketing Revenues [Member] | Indiana Michigan Power Co [Member]
Amount of Gain (Loss) Recognized on Risk Management Contracts
Amount of Gain (Loss) Recognized on Risk Management Contracts		0		0	0		0
Generation and Marketing Revenues [Member] | Ohio Power Co [Member]
Amount of Gain (Loss) Recognized on Risk Management Contracts
Amount of Gain (Loss) Recognized on Risk Management Contracts		0		0	0		0
Generation and Marketing Revenues [Member] | Public Service Co Of Oklahoma [Member]
Amount of Gain (Loss) Recognized on Risk Management Contracts
Amount of Gain (Loss) Recognized on Risk Management Contracts		0		0	0		0
Generation and Marketing Revenues [Member] | Southwestern Electric Power Co [Member]
Amount of Gain (Loss) Recognized on Risk Management Contracts
Amount of Gain (Loss) Recognized on Risk Management Contracts		0		0	0		0
Electric Generation, Transmission and Distribution Revenues [Member]
Amount of Gain (Loss) Recognized on Risk Management Contracts
Amount of Gain (Loss) Recognized on Risk Management Contracts		0		0	0		0
Electric Generation, Transmission and Distribution Revenues [Member] | AEP Texas Inc. [Member]
Amount of Gain (Loss) Recognized on Risk Management Contracts
Amount of Gain (Loss) Recognized on Risk Management Contracts		0		0	0		0
Electric Generation, Transmission and Distribution Revenues [Member] | Appalachian Power Co [Member]
Amount of Gain (Loss) Recognized on Risk Management Contracts
Amount of Gain (Loss) Recognized on Risk Management Contracts		100,000		300,000	100,000		400,000
Electric Generation, Transmission and Distribution Revenues [Member] | Indiana Michigan Power Co [Member]
Amount of Gain (Loss) Recognized on Risk Management Contracts
Amount of Gain (Loss) Recognized on Risk Management Contracts		(9,600,000)		0	2,100,000		(100,000)
Electric Generation, Transmission and Distribution Revenues [Member] | Ohio Power Co [Member]
Amount of Gain (Loss) Recognized on Risk Management Contracts
Amount of Gain (Loss) Recognized on Risk Management Contracts		0		0	0		0
Electric Generation, Transmission and Distribution Revenues [Member] | Public Service Co Of Oklahoma [Member]
Amount of Gain (Loss) Recognized on Risk Management Contracts
Amount of Gain (Loss) Recognized on Risk Management Contracts		0		0	0		0
Electric Generation, Transmission and Distribution Revenues [Member] | Southwestern Electric Power Co [Member]
Amount of Gain (Loss) Recognized on Risk Management Contracts
Amount of Gain (Loss) Recognized on Risk Management Contracts		0		0	0		0
Other Revenues [Member]
Amount of Gain (Loss) Recognized on Risk Management Contracts
Amount of Gain (Loss) Recognized on Risk Management Contracts				0			0
Other Revenues [Member] | AEP Texas Inc. [Member]
Amount of Gain (Loss) Recognized on Risk Management Contracts
Amount of Gain (Loss) Recognized on Risk Management Contracts				0			0
Other Revenues [Member] | Appalachian Power Co [Member]
Amount of Gain (Loss) Recognized on Risk Management Contracts
Amount of Gain (Loss) Recognized on Risk Management Contracts				0			0
Other Revenues [Member] | Indiana Michigan Power Co [Member]
Amount of Gain (Loss) Recognized on Risk Management Contracts
Amount of Gain (Loss) Recognized on Risk Management Contracts				1,900,000			1,900,000
Other Revenues [Member] | Ohio Power Co [Member]
Amount of Gain (Loss) Recognized on Risk Management Contracts
Amount of Gain (Loss) Recognized on Risk Management Contracts				0			0
Other Revenues [Member] | Public Service Co Of Oklahoma [Member]
Amount of Gain (Loss) Recognized on Risk Management Contracts
Amount of Gain (Loss) Recognized on Risk Management Contracts				0			0
Other Revenues [Member] | Southwestern Electric Power Co [Member]
Amount of Gain (Loss) Recognized on Risk Management Contracts
Amount of Gain (Loss) Recognized on Risk Management Contracts				0			0
Purchased Electricity, Fuel and Other Consumables Used for Electric Generation [Member]
Amount of Gain (Loss) Recognized on Risk Management Contracts
Amount of Gain (Loss) Recognized on Risk Management Contracts		200,000		900,000	2,200,000		3,300,000
Purchased Electricity, Fuel and Other Consumables Used for Electric Generation [Member] | AEP Texas Inc. [Member]
Amount of Gain (Loss) Recognized on Risk Management Contracts
Amount of Gain (Loss) Recognized on Risk Management Contracts		0		0	0		0
Purchased Electricity, Fuel and Other Consumables Used for Electric Generation [Member] | Appalachian Power Co [Member]
Amount of Gain (Loss) Recognized on Risk Management Contracts
Amount of Gain (Loss) Recognized on Risk Management Contracts		200,000		900,000	2,100,000		3,000,000.0
Purchased Electricity, Fuel and Other Consumables Used for Electric Generation [Member] | Indiana Michigan Power Co [Member]
Amount of Gain (Loss) Recognized on Risk Management Contracts
Amount of Gain (Loss) Recognized on Risk Management Contracts		0		100,000	100,000		100,000
Purchased Electricity, Fuel and Other Consumables Used for Electric Generation [Member] | Ohio Power Co [Member]
Amount of Gain (Loss) Recognized on Risk Management Contracts
Amount of Gain (Loss) Recognized on Risk Management Contracts		0		0	0		0
Purchased Electricity, Fuel and Other Consumables Used for Electric Generation [Member] | Public Service Co Of Oklahoma [Member]
Amount of Gain (Loss) Recognized on Risk Management Contracts
Amount of Gain (Loss) Recognized on Risk Management Contracts		0		0	0		100,000
Purchased Electricity, Fuel and Other Consumables Used for Electric Generation [Member] | Southwestern Electric Power Co [Member]
Amount of Gain (Loss) Recognized on Risk Management Contracts
Amount of Gain (Loss) Recognized on Risk Management Contracts		0		0	0		0
Other Operation Expense [Member]
Amount of Gain (Loss) Recognized on Risk Management Contracts
Amount of Gain (Loss) Recognized on Risk Management Contracts				1,400,000	(100,000)		3,700,000
Other Operation Expense [Member] | AEP Texas Inc. [Member]
Amount of Gain (Loss) Recognized on Risk Management Contracts
Amount of Gain (Loss) Recognized on Risk Management Contracts				400,000	0		1,100,000
Other Operation Expense [Member] | Appalachian Power Co [Member]
Amount of Gain (Loss) Recognized on Risk Management Contracts
Amount of Gain (Loss) Recognized on Risk Management Contracts				100,000	0		300,000
Other Operation Expense [Member] | Indiana Michigan Power Co [Member]
Amount of Gain (Loss) Recognized on Risk Management Contracts
Amount of Gain (Loss) Recognized on Risk Management Contracts				100,000	0		400,000
Other Operation Expense [Member] | Ohio Power Co [Member]
Amount of Gain (Loss) Recognized on Risk Management Contracts
Amount of Gain (Loss) Recognized on Risk Management Contracts				200,000	0		600,000
Other Operation Expense [Member] | Public Service Co Of Oklahoma [Member]
Amount of Gain (Loss) Recognized on Risk Management Contracts
Amount of Gain (Loss) Recognized on Risk Management Contracts				200,000	0		500,000
Other Operation Expense [Member] | Southwestern Electric Power Co [Member]
Amount of Gain (Loss) Recognized on Risk Management Contracts
Amount of Gain (Loss) Recognized on Risk Management Contracts				200,000	0		600,000
Maintenance Expense [Member]
Amount of Gain (Loss) Recognized on Risk Management Contracts
Amount of Gain (Loss) Recognized on Risk Management Contracts		(400,000)		2,000,000.0	(600,000)		5,200,000
Maintenance Expense [Member] | AEP Texas Inc. [Member]
Amount of Gain (Loss) Recognized on Risk Management Contracts
Amount of Gain (Loss) Recognized on Risk Management Contracts		(100,000)		500,000	(200,000)		1,400,000
Maintenance Expense [Member] | Appalachian Power Co [Member]
Amount of Gain (Loss) Recognized on Risk Management Contracts
Amount of Gain (Loss) Recognized on Risk Management Contracts		(100,000)		200,000	(100,000)		700,000
Maintenance Expense [Member] | Indiana Michigan Power Co [Member]
Amount of Gain (Loss) Recognized on Risk Management Contracts
Amount of Gain (Loss) Recognized on Risk Management Contracts		0		200,000	0		500,000
Maintenance Expense [Member] | Ohio Power Co [Member]
Amount of Gain (Loss) Recognized on Risk Management Contracts
Amount of Gain (Loss) Recognized on Risk Management Contracts		(100,000)		400,000	(100,000)		900,000
Maintenance Expense [Member] | Public Service Co Of Oklahoma [Member]
Amount of Gain (Loss) Recognized on Risk Management Contracts
Amount of Gain (Loss) Recognized on Risk Management Contracts		(100,000)		200,000	(100,000)		600,000
Maintenance Expense [Member] | Southwestern Electric Power Co [Member]
Amount of Gain (Loss) Recognized on Risk Management Contracts
Amount of Gain (Loss) Recognized on Risk Management Contracts		(100,000)		300,000	(100,000)		800,000
Regulatory Assets [Member]
Amount of Gain (Loss) Recognized on Risk Management Contracts
Amount of Gain (Loss) Recognized on Risk Management Contracts	[11]	1,200,000		4,300,000	(36,000,000.0)		49,300,000
Regulatory Assets [Member] | AEP Texas Inc. [Member]
Amount of Gain (Loss) Recognized on Risk Management Contracts
Amount of Gain (Loss) Recognized on Risk Management Contracts	[11]	500,000		0	0		100,000
Regulatory Assets [Member] | Appalachian Power Co [Member]
Amount of Gain (Loss) Recognized on Risk Management Contracts
Amount of Gain (Loss) Recognized on Risk Management Contracts	[11]	1,200,000		0	0		0
Regulatory Assets [Member] | Indiana Michigan Power Co [Member]
Amount of Gain (Loss) Recognized on Risk Management Contracts
Amount of Gain (Loss) Recognized on Risk Management Contracts	[11]	1,700,000		100,000	(400,000)		(1,200,000)
Regulatory Assets [Member] | Ohio Power Co [Member]
Amount of Gain (Loss) Recognized on Risk Management Contracts
Amount of Gain (Loss) Recognized on Risk Management Contracts	[11]	500,000		4,100,000	(24,600,000)		49,000,000.0
Regulatory Assets [Member] | Public Service Co Of Oklahoma [Member]
Amount of Gain (Loss) Recognized on Risk Management Contracts
Amount of Gain (Loss) Recognized on Risk Management Contracts	[11]	(3,500,000)		0	(7,000,000.0)		3,600,000
Regulatory Assets [Member] | Southwestern Electric Power Co [Member]
Amount of Gain (Loss) Recognized on Risk Management Contracts
Amount of Gain (Loss) Recognized on Risk Management Contracts	[11]	(1,100,000)		100,000	(3,500,000)		(2,100,000)
Regulatory Liabilities [Member]
Amount of Gain (Loss) Recognized on Risk Management Contracts
Amount of Gain (Loss) Recognized on Risk Management Contracts	[11]	43,000,000.0		103,200,000	143,500,000		250,100,000
Regulatory Liabilities [Member] | AEP Texas Inc. [Member]
Amount of Gain (Loss) Recognized on Risk Management Contracts
Amount of Gain (Loss) Recognized on Risk Management Contracts	[11]	400,000		(1,500,000)	400,000		(600,000)
Regulatory Liabilities [Member] | Appalachian Power Co [Member]
Amount of Gain (Loss) Recognized on Risk Management Contracts
Amount of Gain (Loss) Recognized on Risk Management Contracts	[11]	11,900,000		59,700,000	3,100,000		79,900,000
Regulatory Liabilities [Member] | Indiana Michigan Power Co [Member]
Amount of Gain (Loss) Recognized on Risk Management Contracts
Amount of Gain (Loss) Recognized on Risk Management Contracts	[11]	1,600,000		3,800,000	6,400,000		7,000,000.0
Regulatory Liabilities [Member] | Ohio Power Co [Member]
Amount of Gain (Loss) Recognized on Risk Management Contracts
Amount of Gain (Loss) Recognized on Risk Management Contracts	[11]	0		900,000	0		2,500,000
Regulatory Liabilities [Member] | Public Service Co Of Oklahoma [Member]
Amount of Gain (Loss) Recognized on Risk Management Contracts
Amount of Gain (Loss) Recognized on Risk Management Contracts	[11]	12,900,000		19,700,000	73,300,000		71,400,000
Regulatory Liabilities [Member] | Southwestern Electric Power Co [Member]
Amount of Gain (Loss) Recognized on Risk Management Contracts
Amount of Gain (Loss) Recognized on Risk Management Contracts	[11]	$ 12,700,000		$ 7,000,000.0	$ 58,200,000		$ 64,800,000

[1] Amounts include $(32) million and $(38) million as of September 30, 2023 and December 31, 2022, respectively, for the fair value hedge adjustment of hedged debt obligations for which hedge accounting has been discontinued.

[2] Amounts included on the Balance Sheet within Noncurrent Liabilities line item Long-term Debt.

[3] Gain (Loss) is included in Interest Expense on the statements of income.

[4] Amounts in “Other’’ column primarily represent counterparty netting of risk management and hedging contracts and associated cash collateral under the accounting guidance for “Derivatives and Hedging.’’

[5] The September 30, 2023 maturities of the net fair value of risk management contracts prior to cash collateral, assets/(liabilities), were as follows: Level 1 matures $(4) million in 2023 and $(9) million in periods 2024-2026; Level 2 matures $64 million in periods 2024-2026, $10 million in periods 2027-2028 and $1 million in periods 2029-2033; Level 3 matures $37 million in 2023, $118 million in periods 2024-2026, $18 million in periods 2027-2028 and $(9) million in periods 2029-2033.  Risk management commodity contracts are substantially comprised of power contracts.

[6] The December 31, 2022 maturities of the net fair value of risk management contracts prior to cash collateral, assets/(liabilities), were as follows: Level 1 matures $(7) million in 2023; Level 2 matures $182 million in 2023, $134 million in periods 2024-2026, $10 million in periods 2027-2028 and $1 million in periods 2029-2033; Level 3 matures $128 million in 2023, $6 million in periods 2024-2026, $6 million in periods 2027-2028 and $(5) million in periods 2029-2033.  Risk management commodity contracts are substantially comprised of power contracts.

[7] Substantially comprised of power contracts for the Registrant Subsidiaries.

[8] Derivative instruments within these categories are disclosed as gross.  These instruments are subject to master netting agreements and are presented on the balance sheets on a net basis in accordance with the accounting guidance for “Derivatives and Hedging.”

[9] Amounts include counterparty netting of risk management and hedging contracts and associated cash collateral in accordance with the accounting guidance for “Derivatives and Hedging.”

[10] All derivative contracts subject to a master netting arrangement or similar agreement are offset in the statement of financial position.

[11] Represents realized and unrealized gains and losses subject to regulatory accounting treatment recorded as either current or noncurrent on the balance sheets.

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Fair Value Long-term Debt, Other Temporary Investments, Nuclear Trusts (Details) - USD ($)		3 Months Ended		9 Months Ended		12 Months Ended
		Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Book Values and Fair Values of Long - term Debt
Total Long-term Debt Outstanding		$ 39,489,100,000		$ 39,489,100,000		$ 36,801,000,000
Long Term Debt, Fair Value	[1]	33,559,800,000		33,559,800,000		32,915,900,000
Other Temporary Investments
Cost		252,600,000		252,600,000		223,600,000
Gross Unrealized Gains		22,600,000		22,600,000		19,400,000
Gross Unrealized Losses		(10,400,000)		(10,400,000)		(8,300,000)
Other Short-term Investments		264,800,000		264,800,000		234,700,000
Debt and Equity Securities Within Other Temporary Investments
Proceeds from Investment Sales		800,000	$ 0	800,000	$ 15,000,000.0
Purchases of Investments		14,600,000	11,800,000	16,900,000	13,400,000
Gross Realized Gains on Investment Sales		300,000	0	300,000	3,600,000
Gross Realized Losses on Investment Sales		0	0	0	500,000
Nuclear Trust Fund Investments
Fair Value		3,539,700,000		3,539,700,000		3,341,200,000
Securities Activity Within Decommissioning and SNF Trusts
Payments to Acquire Investments				2,199,700,000	1,868,200,000
Contractual Maturities, Fair Value of Debt Securities
Fair Value		3,539,700,000		3,539,700,000		3,341,200,000
Spent Nuclear Fuel and Decommissioning Trusts [Member]
Securities Activity Within Decommissioning and SNF Trusts
Payments to Acquire Investments		949,500,000	601,600,000	2,182,800,000	1,854,800,000
Realized Investment Gains (Losses)		36,800,000	24,600,000	91,600,000	41,300,000
Gain (Loss) on Investments		7,700,000	8,400,000	20,000,000.0	33,500,000
Contractual Maturities, Fair Value of Debt Securities
Within 1 year		393,600,000		393,600,000
After 1 year through 5 years		504,400,000		504,400,000
After 5 years through 10 years		188,600,000		188,600,000
After 10 years		258,100,000		258,100,000
Fair Value Measurements (Textuals)
Adjusted Cost of Debt Securities		1,400,000,000		1,400,000,000		1,200,000,000
Adjusted Cost of Domestic Equity Securities		556,000,000		556,000,000		654,000,000
Other than Temporary Impairment Losses, Investments				(43,800,000)		(28,500,000)
Proceeds from Sale of Other Investments		933,000,000.0	588,500,000	2,139,300,000	1,818,400,000
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax		(45,100,000)		(45,100,000)		(29,000,000.0)
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain, before Tax		1,621,500,000		1,621,500,000		1,496,300,000
Cash [Member]
Other Temporary Investments
Cost	[2]	53,800,000		53,800,000		47,100,000
Gross Unrealized Gains	[2]	0		0		0
Gross Unrealized Losses	[2]	0		0		0
Other Short-term Investments	[2]	53,800,000		53,800,000		47,100,000
Fixed Income Funds [Member]
Nuclear Trust Fund Investments
Fair Value		1,344,700,000		1,344,700,000		1,188,700,000
Contractual Maturities, Fair Value of Debt Securities
Fair Value		1,344,700,000		1,344,700,000		1,188,700,000
Fixed Income Funds [Member] | Spent Nuclear Fuel and Decommissioning Trusts [Member]
Fair Value Measurements (Textuals)
Other than Temporary Impairment Losses, Investments				(43,800,000)		(28,500,000)
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax		(43,200,000)		(43,200,000)		(22,600,000)
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain, before Tax		1,000,000.0		1,000,000.0		12,600,000
Mutual Funds Fixed Income [Member]
Other Temporary Investments
Cost	[3]	170,400,000		170,400,000		152,400,000
Gross Unrealized Gains	[3]	0		0		0
Gross Unrealized Losses	[3]	(10,400,000)		(10,400,000)		(8,300,000)
Other Short-term Investments	[3]	160,000,000.0		160,000,000.0		144,100,000
Domestic [Member]
Nuclear Trust Fund Investments
Fair Value	[4]	2,174,500,000		2,174,500,000		2,131,300,000
Contractual Maturities, Fair Value of Debt Securities
Fair Value	[4]	2,174,500,000		2,174,500,000		2,131,300,000
Domestic [Member] | Spent Nuclear Fuel and Decommissioning Trusts [Member]
Fair Value Measurements (Textuals)
Other than Temporary Impairment Losses, Investments				0		0
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax		(1,900,000)		(1,900,000)		(6,400,000)
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain, before Tax		1,620,500,000		1,620,500,000		1,483,700,000
Mutual Funds Equity [Member]
Other Temporary Investments
Cost		15,000,000.0		15,000,000.0		15,100,000
Gross Unrealized Gains		22,600,000		22,600,000		19,400,000
Gross Unrealized Losses		0		0		0
Other Short-term Investments	[4]	37,600,000		37,600,000		34,500,000
Cash and Cash Equivalents [Member]
Nuclear Trust Fund Investments
Fair Value	[5]	20,500,000		20,500,000		21,200,000
Contractual Maturities, Fair Value of Debt Securities
Fair Value	[5]	20,500,000		20,500,000		21,200,000
Cash and Cash Equivalents [Member] | Spent Nuclear Fuel and Decommissioning Trusts [Member]
Fair Value Measurements (Textuals)
Other than Temporary Impairment Losses, Investments				0		0
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax		0		0		0
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain, before Tax		0		0		0
US Government Agencies Debt Securities [Member]
Nuclear Trust Fund Investments
Fair Value		1,204,700,000		1,204,700,000		1,123,800,000
Contractual Maturities, Fair Value of Debt Securities
Fair Value		1,204,700,000		1,204,700,000		1,123,800,000
US Government Agencies Debt Securities [Member] | Spent Nuclear Fuel and Decommissioning Trusts [Member]
Fair Value Measurements (Textuals)
Other than Temporary Impairment Losses, Investments				(38,500,000)		(18,800,000)
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax		(30,800,000)		(30,800,000)		(14,900,000)
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain, before Tax		600,000		600,000		11,800,000
Corporate Debt [Member]
Nuclear Trust Fund Investments
Fair Value		136,800,000		136,800,000		61,600,000
Contractual Maturities, Fair Value of Debt Securities
Fair Value		136,800,000		136,800,000		61,600,000
Corporate Debt [Member] | Spent Nuclear Fuel and Decommissioning Trusts [Member]
Fair Value Measurements (Textuals)
Other than Temporary Impairment Losses, Investments				(5,300,000)		(9,600,000)
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax		(12,400,000)		(12,400,000)		(7,700,000)
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain, before Tax		400,000		400,000		700,000
State and Local Jurisdiction [Member]
Nuclear Trust Fund Investments
Fair Value		3,200,000		3,200,000		3,300,000
Contractual Maturities, Fair Value of Debt Securities
Fair Value		3,200,000		3,200,000		3,300,000
State and Local Jurisdiction [Member] | Spent Nuclear Fuel and Decommissioning Trusts [Member]
Fair Value Measurements (Textuals)
Other than Temporary Impairment Losses, Investments				0		(100,000)
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax		0		0		0
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain, before Tax		0		0		100,000
Other Cash Deposits [Member]
Other Temporary Investments
Cost		13,400,000		13,400,000		9,000,000.0
Gross Unrealized Gains		0		0		0
Gross Unrealized Losses		0		0		0
Other Short-term Investments		13,400,000		13,400,000		9,000,000.0
AEP Texas Inc. [Member]
Book Values and Fair Values of Long - term Debt
Total Long-term Debt Outstanding		5,926,700,000		5,926,700,000		5,657,800,000
Long Term Debt, Fair Value		4,963,800,000		4,963,800,000		5,045,800,000
AEP Transmission Co [Member]
Book Values and Fair Values of Long - term Debt
Total Long-term Debt Outstanding		5,473,700,000		5,473,700,000		4,782,800,000
Long Term Debt, Fair Value		4,270,800,000		4,270,800,000		3,940,500,000
Appalachian Power Co [Member]
Book Values and Fair Values of Long - term Debt
Total Long-term Debt Outstanding		5,587,300,000		5,587,300,000		5,410,500,000
Long Term Debt, Fair Value		4,901,400,000		4,901,400,000		5,079,200,000
Indiana Michigan Power Co [Member]
Book Values and Fair Values of Long - term Debt
Total Long-term Debt Outstanding		3,443,600,000		3,443,600,000		3,260,800,000
Long Term Debt, Fair Value		2,920,600,000		2,920,600,000		2,929,000,000
Nuclear Trust Fund Investments
Fair Value		3,539,700,000		3,539,700,000		3,341,200,000
Securities Activity Within Decommissioning and SNF Trusts
Payments to Acquire Investments				2,182,800,000	1,854,800,000
Contractual Maturities, Fair Value of Debt Securities
Fair Value		3,539,700,000		3,539,700,000		3,341,200,000
Indiana Michigan Power Co [Member] | Spent Nuclear Fuel and Decommissioning Trusts [Member]
Securities Activity Within Decommissioning and SNF Trusts
Payments to Acquire Investments		949,500,000	601,600,000	2,182,800,000	1,854,800,000
Realized Investment Gains (Losses)		36,800,000	24,600,000	91,600,000	41,300,000
Gain (Loss) on Investments		7,700,000	8,400,000	20,000,000.0	33,500,000
Contractual Maturities, Fair Value of Debt Securities
Within 1 year		393,600,000		393,600,000
After 1 year through 5 years		504,400,000		504,400,000
After 5 years through 10 years		188,600,000		188,600,000
After 10 years		258,100,000		258,100,000
Fair Value Measurements (Textuals)
Adjusted Cost of Debt Securities		1,400,000,000		1,400,000,000		1,200,000,000
Adjusted Cost of Domestic Equity Securities		556,000,000		556,000,000		654,000,000
Other than Temporary Impairment Losses, Investments				(43,800,000)		(28,500,000)
Proceeds from Sale of Other Investments		933,000,000.0	$ 588,500,000	2,139,300,000	$ 1,818,400,000
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax		(45,100,000)		(45,100,000)		(29,000,000.0)
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain, before Tax		1,621,500,000		1,621,500,000		1,496,300,000
Indiana Michigan Power Co [Member] | Fixed Income Funds [Member]
Nuclear Trust Fund Investments
Fair Value		1,344,700,000		1,344,700,000		1,188,700,000
Contractual Maturities, Fair Value of Debt Securities
Fair Value		1,344,700,000		1,344,700,000		1,188,700,000
Indiana Michigan Power Co [Member] | Fixed Income Funds [Member] | Spent Nuclear Fuel and Decommissioning Trusts [Member]
Fair Value Measurements (Textuals)
Other than Temporary Impairment Losses, Investments				(43,800,000)		(28,500,000)
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax		(43,200,000)		(43,200,000)		(22,600,000)
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain, before Tax		1,000,000.0		1,000,000.0		12,600,000
Indiana Michigan Power Co [Member] | Domestic [Member]
Nuclear Trust Fund Investments
Fair Value	[4]	2,174,500,000		2,174,500,000		2,131,300,000
Contractual Maturities, Fair Value of Debt Securities
Fair Value	[4]	2,174,500,000		2,174,500,000		2,131,300,000
Indiana Michigan Power Co [Member] | Domestic [Member] | Spent Nuclear Fuel and Decommissioning Trusts [Member]
Fair Value Measurements (Textuals)
Other than Temporary Impairment Losses, Investments				0		0
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax		(1,900,000)		(1,900,000)		(6,400,000)
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain, before Tax		1,620,500,000		1,620,500,000		1,483,700,000
Indiana Michigan Power Co [Member] | Cash and Cash Equivalents [Member]
Nuclear Trust Fund Investments
Fair Value	[5]	20,500,000		20,500,000		21,200,000
Contractual Maturities, Fair Value of Debt Securities
Fair Value	[5]	20,500,000		20,500,000		21,200,000
Indiana Michigan Power Co [Member] | Cash and Cash Equivalents [Member] | Spent Nuclear Fuel and Decommissioning Trusts [Member]
Fair Value Measurements (Textuals)
Other than Temporary Impairment Losses, Investments				0		0
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax		0		0		0
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain, before Tax		0		0		0
Indiana Michigan Power Co [Member] | US Government Agencies Debt Securities [Member]
Nuclear Trust Fund Investments
Fair Value		1,204,700,000		1,204,700,000		1,123,800,000
Contractual Maturities, Fair Value of Debt Securities
Fair Value		1,204,700,000		1,204,700,000		1,123,800,000
Indiana Michigan Power Co [Member] | US Government Agencies Debt Securities [Member] | Spent Nuclear Fuel and Decommissioning Trusts [Member]
Fair Value Measurements (Textuals)
Other than Temporary Impairment Losses, Investments				(38,500,000)		(18,800,000)
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax		(30,800,000)		(30,800,000)		(14,900,000)
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain, before Tax		600,000		600,000		11,800,000
Indiana Michigan Power Co [Member] | Corporate Debt [Member]
Nuclear Trust Fund Investments
Fair Value		136,800,000		136,800,000		61,600,000
Contractual Maturities, Fair Value of Debt Securities
Fair Value		136,800,000		136,800,000		61,600,000
Indiana Michigan Power Co [Member] | Corporate Debt [Member] | Spent Nuclear Fuel and Decommissioning Trusts [Member]
Fair Value Measurements (Textuals)
Other than Temporary Impairment Losses, Investments				(5,300,000)		(9,600,000)
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax		(12,400,000)		(12,400,000)		(7,700,000)
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain, before Tax		400,000		400,000		700,000
Indiana Michigan Power Co [Member] | State and Local Jurisdiction [Member]
Nuclear Trust Fund Investments
Fair Value		3,200,000		3,200,000		3,300,000
Contractual Maturities, Fair Value of Debt Securities
Fair Value		3,200,000		3,200,000		3,300,000
Indiana Michigan Power Co [Member] | State and Local Jurisdiction [Member] | Spent Nuclear Fuel and Decommissioning Trusts [Member]
Fair Value Measurements (Textuals)
Other than Temporary Impairment Losses, Investments				0		(100,000)
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax		0		0		0
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain, before Tax		0		0		100,000
Ohio Power Co [Member]
Book Values and Fair Values of Long - term Debt
Total Long-term Debt Outstanding		3,366,200,000		3,366,200,000		2,970,300,000
Long Term Debt, Fair Value		2,645,200,000		2,645,200,000		2,516,600,000
Public Service Co Of Oklahoma [Member]
Book Values and Fair Values of Long - term Debt
Total Long-term Debt Outstanding		2,384,200,000		2,384,200,000		1,912,800,000
Long Term Debt, Fair Value		1,942,500,000		1,942,500,000		1,635,800,000
Southwestern Electric Power Co [Member]
Book Values and Fair Values of Long - term Debt
Total Long-term Debt Outstanding		3,646,200,000		3,646,200,000		3,391,600,000
Long Term Debt, Fair Value		2,944,800,000		2,944,800,000		2,870,900,000
Equity Units [Member]
Book Values and Fair Values of Long - term Debt
Long Term Debt, Fair Value		$ 0		$ 0		$ 877,000,000

[1] The fair value amounts include debt related to AEP’s Equity Units and had a fair value of $0 and $877 million as of September 30, 2023 and December 31, 2022, respectively. See “Equity Units” section of Note 12 for additional information.

[2] Primarily represents amounts held for the repayment of debt.

[3] Primarily short and intermediate maturities which may be sold and do not contain maturity dates.

[4] Amounts represent publicly traded equity securities and equity-based mutual funds.

[5] Amounts in “Other’’ column primarily represent accrued interest receivables from financial institutions.  Level 1 amounts primarily represent investments in money market funds.

XML

Fair Value Assets and Liabilities (Details) - USD ($)		3 Months Ended			9 Months Ended
		Sep. 30, 2023		Sep. 30, 2022	Sep. 30, 2023		Sep. 30, 2022	Dec. 31, 2022
Other [Member]
Risk Management Assets		$ (637,600,000)			$ (637,600,000)			$ (1,264,300,000)
Risk Management Liabilities		(545,100,000)			(545,100,000)			(784,700,000)
Assets, Fair Value Disclosure
Other Short-term Investments		13,400,000			13,400,000			9,000,000.0
Spent Nuclear Fuel and Decommissioning Trusts
Spent Nuclear Fuel and Decommissioning Trusts		10,500,000			10,500,000			9,900,000
Total Assets		(613,700,000)			(613,700,000)			(1,245,400,000)
Risk Management Assets
Risk Management Assets		(637,600,000)			(637,600,000)			(1,264,300,000)
Liabilities, Fair Value Disclosure
Risk Management Liabilities		(545,100,000)			(545,100,000)			(784,700,000)
Risk Management Assets		552,900,000			552,900,000			632,900,000
Risk Management Liabilities		429,900,000			429,900,000			490,400,000
Other Short-term Investments		264,800,000			264,800,000			234,700,000
Spent Nuclear Fuel and Decommissioning Trusts		3,539,700,000			3,539,700,000			3,341,200,000
Total Assets		4,357,400,000			4,357,400,000			4,208,800,000
Risk Management Assets		552,900,000			552,900,000			632,900,000
Risk Management Liabilities		429,900,000			429,900,000			490,400,000
Changes in the Fair Value of Net Trading Derivatives and other investments
Beginning Balance		126,100,000		$ 283,900,000	160,400,000		$ 103,100,000
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Earnings	[1],[2]	39,700,000		64,300,000	(41,300,000)		69,300,000
Unrealized Gain (Loss) Included in Net Income (or Changes in Net Assets) Relating to Assets Still Held at the Reporting Date	[1]	72,700,000		(12,600,000)	67,700,000		(44,600,000)
Realized and Unrealized Gains (Losses) Included in Other Comprehensive Income	[3]	4,900,000		13,100,000	(10,500,000)		29,400,000
Settlements		(87,100,000)		(138,300,000)	(85,900,000)		(153,800,000)
Transfers into Level 3	[4],[5]			(500,000)	(6,100,000)		1,700,000
Transfers out of Level 3	[5]	6,600,000		3,500,000	3,800,000		13,200,000
Changes in Fair Value Allocated to Regulated Jurisdiction	[6]	19,900,000		72,500,000	94,700,000		267,600,000
Ending Balance		182,800,000		285,900,000	182,800,000		285,900,000
Fair Value Measurements 1 (Textuals)
Total Long-term Debt Outstanding		39,489,100,000			39,489,100,000			36,801,000,000
Level 1 [Member]
Risk Management Assets		11,400,000			11,400,000			15,000,000.0
Risk Management Liabilities		24,800,000			24,800,000			21,800,000
Assets, Fair Value Disclosure
Other Short-term Investments		251,400,000			251,400,000			225,700,000
Spent Nuclear Fuel and Decommissioning Trusts
Spent Nuclear Fuel and Decommissioning Trusts		2,184,500,000			2,184,500,000			2,142,600,000
Total Assets		2,447,300,000			2,447,300,000			2,383,300,000
Risk Management Assets
Risk Management Assets		11,400,000			11,400,000			15,000,000.0
Liabilities, Fair Value Disclosure
Risk Management Liabilities		24,800,000			24,800,000			21,800,000
Level 2 [Member]
Risk Management Assets		840,600,000			840,600,000			1,541,100,000
Risk Management Liabilities		794,500,000			794,500,000			1,072,600,000
Assets, Fair Value Disclosure
Other Short-term Investments		0			0			0
Spent Nuclear Fuel and Decommissioning Trusts
Spent Nuclear Fuel and Decommissioning Trusts		1,344,700,000			1,344,700,000			1,188,700,000
Total Assets		2,185,300,000			2,185,300,000			2,729,800,000
Risk Management Assets
Risk Management Assets		840,600,000			840,600,000			1,541,100,000
Liabilities, Fair Value Disclosure
Risk Management Liabilities		794,500,000			794,500,000			1,072,600,000
Level 3 [Member]
Risk Management Assets		338,500,000			338,500,000			341,100,000
Risk Management Liabilities		155,700,000			155,700,000			180,700,000
Assets, Fair Value Disclosure
Other Short-term Investments		0			0			0
Spent Nuclear Fuel and Decommissioning Trusts
Spent Nuclear Fuel and Decommissioning Trusts		0			0			0
Total Assets		338,500,000			338,500,000			341,100,000
Risk Management Assets
Risk Management Assets		338,500,000			338,500,000			341,100,000
Liabilities, Fair Value Disclosure
Risk Management Liabilities		155,700,000			155,700,000			180,700,000
2023 [Member] | Level 1 [Member]
Fair Value Measurements 1 (Textuals)
Maturity of Net Fair Value of Risk Management Contracts Prior to Cash Collateral, Assets/Liabilities		(4,000,000)			(4,000,000)			(7,000,000)
2023 [Member] | Level 2 [Member]
Fair Value Measurements 1 (Textuals)
Maturity of Net Fair Value of Risk Management Contracts Prior to Cash Collateral, Assets/Liabilities								182,000,000
2023 [Member] | Level 3 [Member]
Fair Value Measurements 1 (Textuals)
Maturity of Net Fair Value of Risk Management Contracts Prior to Cash Collateral, Assets/Liabilities		37,000,000			37,000,000			128,000,000
2024 - 2026 [Member] | Level 1 [Member]
Fair Value Measurements 1 (Textuals)
Maturity of Net Fair Value of Risk Management Contracts Prior to Cash Collateral, Assets/Liabilities		(9,000,000)			(9,000,000)
2024 - 2026 [Member] | Level 2 [Member]
Fair Value Measurements 1 (Textuals)
Maturity of Net Fair Value of Risk Management Contracts Prior to Cash Collateral, Assets/Liabilities		64,000,000			64,000,000			134,000,000
2024 - 2026 [Member] | Level 3 [Member]
Fair Value Measurements 1 (Textuals)
Maturity of Net Fair Value of Risk Management Contracts Prior to Cash Collateral, Assets/Liabilities		118,000,000			118,000,000			6,000,000
2027 - 2028 [Member] | Level 2 [Member]
Fair Value Measurements 1 (Textuals)
Maturity of Net Fair Value of Risk Management Contracts Prior to Cash Collateral, Assets/Liabilities		10,000,000			10,000,000			10,000,000
2027 - 2028 [Member] | Level 3 [Member]
Fair Value Measurements 1 (Textuals)
Maturity of Net Fair Value of Risk Management Contracts Prior to Cash Collateral, Assets/Liabilities		18,000,000			18,000,000			6,000,000
2029 - 2033 [Member] | Level 2 [Member]
Fair Value Measurements 1 (Textuals)
Maturity of Net Fair Value of Risk Management Contracts Prior to Cash Collateral, Assets/Liabilities		1,000,000			1,000,000			1,000,000
2029 - 2033 [Member] | Level 3 [Member]
Fair Value Measurements 1 (Textuals)
Maturity of Net Fair Value of Risk Management Contracts Prior to Cash Collateral, Assets/Liabilities		(9,000,000)			(9,000,000)			(5,000,000)
Risk Management Commodity Contracts [Member] | Other [Member]
Risk Management Assets	[7]	(627,400,000)	[8]		(627,400,000)	[8]		(1,211,500,000)	[9]
Risk Management Liabilities	[7]	(534,900,000)	[8]		(534,900,000)	[8]		(731,900,000)	[9]
Risk Management Assets
Risk Management Assets	[7]	(627,400,000)	[8]		(627,400,000)	[8]		(1,211,500,000)	[9]
Liabilities, Fair Value Disclosure
Risk Management Liabilities	[7]	(534,900,000)	[8]		(534,900,000)	[8]		(731,900,000)	[9]
Risk Management Commodity Contracts [Member]
Risk Management Assets	[7]	424,500,000	[8]		424,500,000	[8]		315,400,000	[9]
Risk Management Liabilities	[7]	291,200,000	[8]		291,200,000	[8]		339,800,000	[9]
Risk Management Assets
Risk Management Assets	[7]	424,500,000	[8]		424,500,000	[8]		315,400,000	[9]
Liabilities, Fair Value Disclosure
Risk Management Liabilities	[7]	291,200,000	[8]		291,200,000	[8]		339,800,000	[9]
Risk Management Commodity Contracts [Member] | Level 1 [Member]
Risk Management Assets	[7]	11,400,000	[8]		11,400,000	[8]		15,000,000.0	[9]
Risk Management Liabilities	[7]	24,800,000	[8]		24,800,000	[8]		21,800,000	[9]
Risk Management Assets
Risk Management Assets	[7]	11,400,000	[8]		11,400,000	[8]		15,000,000.0	[9]
Liabilities, Fair Value Disclosure
Risk Management Liabilities	[7]	24,800,000	[8]		24,800,000	[8]		21,800,000	[9]
Risk Management Commodity Contracts [Member] | Level 2 [Member]
Risk Management Assets	[7]	721,300,000	[8]		721,300,000	[8]		1,197,500,000	[9]
Risk Management Liabilities	[7]	646,300,000	[8]		646,300,000	[8]		870,900,000	[9]
Risk Management Assets
Risk Management Assets	[7]	721,300,000	[8]		721,300,000	[8]		1,197,500,000	[9]
Liabilities, Fair Value Disclosure
Risk Management Liabilities	[7]	646,300,000	[8]		646,300,000	[8]		870,900,000	[9]
Risk Management Commodity Contracts [Member] | Level 3 [Member]
Risk Management Assets	[7]	319,200,000	[8]		319,200,000	[8]		314,400,000	[9]
Risk Management Liabilities	[7]	155,000,000.0	[8]		155,000,000.0	[8]		179,000,000.0	[9]
Risk Management Assets
Risk Management Assets	[7]	319,200,000	[8]		319,200,000	[8]		314,400,000	[9]
Liabilities, Fair Value Disclosure
Risk Management Liabilities	[7]	155,000,000.0	[8]		155,000,000.0	[8]		179,000,000.0	[9]
Energy Contracts [Member] | Level 3 [Member]
Risk Management Assets		224,300,000			224,300,000			204,000,000.0
Risk Management Liabilities		147,700,000			147,700,000			167,400,000
Risk Management Assets
Risk Management Assets		224,300,000			224,300,000			204,000,000.0
Liabilities, Fair Value Disclosure
Risk Management Liabilities		147,700,000			147,700,000			167,400,000
Energy Contracts [Member] | Weighted Average [Member] | Level 3 [Member]
Fair Value Significant Unobservable Input Price Per Unit	[10],[11]	45.43			45.43			49.14
Level 3 Quantitative Information
Fair Value Significant Unobservable Input Price Per Unit	[10],[11]	45.43			45.43			49.14
Energy Contracts [Member] | Low [Member] | Level 3 [Member]
Fair Value Significant Unobservable Input Price Per Unit	[10]	5.98			5.98			2.91
Level 3 Quantitative Information
Fair Value Significant Unobservable Input Price Per Unit	[10]	5.98			5.98			2.91
Energy Contracts [Member] | High [Member] | Level 3 [Member]
Fair Value Significant Unobservable Input Price Per Unit	[10]	137.52			137.52			187.34
Level 3 Quantitative Information
Fair Value Significant Unobservable Input Price Per Unit	[10]	137.52			137.52			187.34
Natural Gas Contracts [Member] | Level 3 [Member]
Risk Management Assets		0			0
Risk Management Liabilities		200,000			200,000
Risk Management Assets
Risk Management Assets		0			0
Liabilities, Fair Value Disclosure
Risk Management Liabilities		200,000			200,000
Natural Gas Contracts [Member] | Weighted Average [Member] | Level 3 [Member]
Fair Value Significant Unobservable Input Price Per Unit	[11],[12]	3.55			3.55
Level 3 Quantitative Information
Fair Value Significant Unobservable Input Price Per Unit	[11],[12]	3.55			3.55
Natural Gas Contracts [Member] | Low [Member] | Level 3 [Member]
Fair Value Significant Unobservable Input Price Per Unit	[12]	3.55			3.55
Level 3 Quantitative Information
Fair Value Significant Unobservable Input Price Per Unit	[12]	3.55			3.55
Natural Gas Contracts [Member] | High [Member] | Level 3 [Member]
Fair Value Significant Unobservable Input Price Per Unit	[12]	3.55			3.55
Level 3 Quantitative Information
Fair Value Significant Unobservable Input Price Per Unit	[12]	3.55			3.55
FTRs [Member] | Level 3 [Member]
Risk Management Assets		114,200,000			114,200,000			137,100,000
Risk Management Liabilities		7,800,000			7,800,000			13,300,000
Risk Management Assets
Risk Management Assets		114,200,000			114,200,000			137,100,000
Liabilities, Fair Value Disclosure
Risk Management Liabilities		7,800,000			7,800,000			13,300,000
FTRs [Member] | Weighted Average [Member] | Level 3 [Member]
Fair Value Significant Unobservable Input Price Per Unit	[10],[11]	0.29			0.29			1.18
Level 3 Quantitative Information
Fair Value Significant Unobservable Input Price Per Unit	[10],[11]	0.29			0.29			1.18
FTRs [Member] | Low [Member] | Level 3 [Member]
Fair Value Significant Unobservable Input Price Per Unit	[10]	(17.92)			(17.92)			(36.45)
Level 3 Quantitative Information
Fair Value Significant Unobservable Input Price Per Unit	[10]	(17.92)			(17.92)			(36.45)
FTRs [Member] | High [Member] | Level 3 [Member]
Fair Value Significant Unobservable Input Price Per Unit	[10]	17.07			17.07			20.72
Level 3 Quantitative Information
Fair Value Significant Unobservable Input Price Per Unit	[10]	17.07			17.07			20.72
Commodity Hedges [Member] | Other [Member]
Risk Management Assets	[7]	(10,200,000)			(10,200,000)			(52,800,000)
Risk Management Liabilities	[7]	(10,200,000)			(10,200,000)			(52,800,000)
Risk Management Assets
Risk Management Assets	[7]	(10,200,000)			(10,200,000)			(52,800,000)
Liabilities, Fair Value Disclosure
Risk Management Liabilities	[7]	(10,200,000)			(10,200,000)			(52,800,000)
Commodity Hedges [Member]
Risk Management Assets	[7]	128,400,000			128,400,000			306,500,000
Risk Management Liabilities	[7]	600,000			600,000			23,200,000
Risk Management Assets
Risk Management Assets	[7]	128,400,000			128,400,000			306,500,000
Liabilities, Fair Value Disclosure
Risk Management Liabilities	[7]	600,000			600,000			23,200,000
Commodity Hedges [Member] | Level 1 [Member]
Risk Management Assets	[7]	0			0			0
Risk Management Liabilities	[7]	0			0			0
Risk Management Assets
Risk Management Assets	[7]	0			0			0
Liabilities, Fair Value Disclosure
Risk Management Liabilities	[7]	0			0			0
Commodity Hedges [Member] | Level 2 [Member]
Risk Management Assets	[7]	119,300,000			119,300,000			332,600,000
Risk Management Liabilities	[7]	10,100,000			10,100,000			74,300,000
Risk Management Assets
Risk Management Assets	[7]	119,300,000			119,300,000			332,600,000
Liabilities, Fair Value Disclosure
Risk Management Liabilities	[7]	10,100,000			10,100,000			74,300,000
Commodity Hedges [Member] | Level 3 [Member]
Risk Management Assets	[7]	19,300,000			19,300,000			26,700,000
Risk Management Liabilities	[7]	700,000			700,000			1,700,000
Risk Management Assets
Risk Management Assets	[7]	19,300,000			19,300,000			26,700,000
Liabilities, Fair Value Disclosure
Risk Management Liabilities	[7]	700,000			700,000			1,700,000
Interest Rate [Member] | Other [Member]
Risk Management Assets								0
Risk Management Assets
Risk Management Assets								0
Interest Rate [Member]
Risk Management Assets								11,000,000.0
Risk Management Assets
Risk Management Assets								11,000,000.0
Interest Rate [Member] | Level 1 [Member]
Risk Management Assets								0
Risk Management Assets
Risk Management Assets								0
Interest Rate [Member] | Level 2 [Member]
Risk Management Assets								11,000,000.0
Risk Management Assets
Risk Management Assets								11,000,000.0
Interest Rate [Member] | Level 3 [Member]
Risk Management Assets								0
Risk Management Assets
Risk Management Assets								0
Fair Value Hedges [Member] | Other [Member]
Risk Management Liabilities		0			0			0
Liabilities, Fair Value Disclosure
Risk Management Liabilities		0			0			0
Fair Value Hedges [Member]
Risk Management Liabilities		138,100,000			138,100,000			127,400,000
Liabilities, Fair Value Disclosure
Risk Management Liabilities		138,100,000			138,100,000			127,400,000
Fair Value Hedges [Member] | Level 1 [Member]
Risk Management Liabilities		0			0			0
Liabilities, Fair Value Disclosure
Risk Management Liabilities		0			0			0
Fair Value Hedges [Member] | Level 2 [Member]
Risk Management Liabilities		138,100,000			138,100,000			127,400,000
Liabilities, Fair Value Disclosure
Risk Management Liabilities		138,100,000			138,100,000			127,400,000
Fair Value Hedges [Member] | Level 3 [Member]
Risk Management Liabilities		0			0			0
Liabilities, Fair Value Disclosure
Risk Management Liabilities		0			0			0
AEP Texas Inc. [Member] | Other [Member]
Assets, Fair Value Disclosure
Cash and Cash Equivalents		0			0			0
Spent Nuclear Fuel and Decommissioning Trusts
Total Assets		0			0
AEP Texas Inc. [Member]
Assets, Fair Value Disclosure
Cash and Cash Equivalents		46,900,000			46,900,000			32,700,000
Spent Nuclear Fuel and Decommissioning Trusts
Total Assets		47,300,000			47,300,000
Fair Value Measurements 1 (Textuals)
Total Long-term Debt Outstanding		5,926,700,000			5,926,700,000			5,657,800,000
AEP Texas Inc. [Member] | Level 1 [Member]
Assets, Fair Value Disclosure
Cash and Cash Equivalents		46,900,000			46,900,000			32,700,000
Spent Nuclear Fuel and Decommissioning Trusts
Total Assets		46,900,000			46,900,000
AEP Texas Inc. [Member] | Level 2 [Member]
Assets, Fair Value Disclosure
Cash and Cash Equivalents		0			0			0
Spent Nuclear Fuel and Decommissioning Trusts
Total Assets		400,000			400,000
AEP Texas Inc. [Member] | Level 3 [Member]
Assets, Fair Value Disclosure
Cash and Cash Equivalents		0			0			0
Spent Nuclear Fuel and Decommissioning Trusts
Total Assets		0			0
AEP Texas Inc. [Member] | Risk Management Commodity Contracts [Member] | Other [Member]
Risk Management Assets	[13]	0			0
Risk Management Assets
Risk Management Assets	[13]	0			0
AEP Texas Inc. [Member] | Risk Management Commodity Contracts [Member]
Risk Management Assets	[13]	400,000			400,000
Risk Management Assets
Risk Management Assets	[13]	400,000			400,000
AEP Texas Inc. [Member] | Risk Management Commodity Contracts [Member] | Level 1 [Member]
Risk Management Assets	[13]	0			0
Risk Management Assets
Risk Management Assets	[13]	0			0
AEP Texas Inc. [Member] | Risk Management Commodity Contracts [Member] | Level 2 [Member]
Risk Management Assets	[13]	400,000			400,000
Risk Management Assets
Risk Management Assets	[13]	400,000			400,000
AEP Texas Inc. [Member] | Risk Management Commodity Contracts [Member] | Level 3 [Member]
Risk Management Assets	[13]	0			0
Risk Management Assets
Risk Management Assets	[13]	0			0
AEP Transmission Co [Member]
Fair Value Measurements 1 (Textuals)
Total Long-term Debt Outstanding		5,473,700,000			5,473,700,000			4,782,800,000
Appalachian Power Co [Member] | Other [Member]
Assets, Fair Value Disclosure
Cash and Cash Equivalents		0			0			0
Spent Nuclear Fuel and Decommissioning Trusts
Total Assets		(2,400,000)			(2,400,000)			(1,000,000.0)
Appalachian Power Co [Member]
Assets, Fair Value Disclosure
Cash and Cash Equivalents		6,900,000			6,900,000			14,400,000
Spent Nuclear Fuel and Decommissioning Trusts
Total Assets		53,500,000			53,500,000			83,500,000
Changes in the Fair Value of Net Trading Derivatives and other investments
Beginning Balance		39,400,000		79,600,000	69,100,000		41,700,000
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Earnings	[1],[2]	10,000,000.0		20,100,000	(47,000,000.0)		3,000,000.0
Unrealized Gain (Loss) Included in Net Income (or Changes in Net Assets) Relating to Assets Still Held at the Reporting Date	[1]	0		0	0		0
Realized and Unrealized Gains (Losses) Included in Other Comprehensive Income	[3]	0		0	0		0
Settlements		(16,500,000)		(34,600,000)	(22,100,000)		(44,700,000)
Transfers into Level 3	[4],[5]			0	0		0
Transfers out of Level 3	[5]	100,000		0	0		0
Changes in Fair Value Allocated to Regulated Jurisdiction	[6]	12,100,000		41,500,000	45,100,000		106,600,000
Ending Balance		45,100,000		106,600,000	45,100,000		106,600,000
Fair Value Measurements 1 (Textuals)
Total Long-term Debt Outstanding		5,587,300,000			5,587,300,000			5,410,500,000
Appalachian Power Co [Member] | Level 1 [Member]
Assets, Fair Value Disclosure
Cash and Cash Equivalents		6,900,000			6,900,000			14,400,000
Spent Nuclear Fuel and Decommissioning Trusts
Total Assets		6,900,000			6,900,000			14,400,000
Appalachian Power Co [Member] | Level 2 [Member]
Assets, Fair Value Disclosure
Cash and Cash Equivalents		0			0			0
Spent Nuclear Fuel and Decommissioning Trusts
Total Assets		3,800,000			3,800,000			700,000
Appalachian Power Co [Member] | Level 3 [Member]
Assets, Fair Value Disclosure
Cash and Cash Equivalents		0			0			0
Spent Nuclear Fuel and Decommissioning Trusts
Total Assets		45,200,000			45,200,000			69,400,000
Appalachian Power Co [Member] | Risk Management Commodity Contracts [Member] | Other [Member]
Risk Management Assets	[7],[13]	(2,400,000)			(2,400,000)			(1,000,000.0)
Risk Management Liabilities	[7],[13]	(2,400,000)			(2,400,000)			(1,400,000)
Risk Management Assets
Risk Management Assets	[7],[13]	(2,400,000)			(2,400,000)			(1,000,000.0)
Liabilities, Fair Value Disclosure
Risk Management Liabilities	[7],[13]	(2,400,000)			(2,400,000)			(1,400,000)
Appalachian Power Co [Member] | Risk Management Commodity Contracts [Member]
Risk Management Assets	[7],[13]	46,600,000			46,600,000			69,100,000
Risk Management Liabilities	[7],[13]	2,700,000			2,700,000			3,500,000
Risk Management Assets
Risk Management Assets	[7],[13]	46,600,000			46,600,000			69,100,000
Liabilities, Fair Value Disclosure
Risk Management Liabilities	[7],[13]	2,700,000			2,700,000			3,500,000
Appalachian Power Co [Member] | Risk Management Commodity Contracts [Member] | Level 1 [Member]
Risk Management Assets	[7],[13]	0			0			0
Risk Management Liabilities	[7],[13]	0			0			0
Risk Management Assets
Risk Management Assets	[7],[13]	0			0			0
Liabilities, Fair Value Disclosure
Risk Management Liabilities	[7],[13]	0			0			0
Appalachian Power Co [Member] | Risk Management Commodity Contracts [Member] | Level 2 [Member]
Risk Management Assets	[7],[13]	3,800,000			3,800,000			700,000
Risk Management Liabilities	[7],[13]	5,000,000.0			5,000,000.0			4,600,000
Risk Management Assets
Risk Management Assets	[7],[13]	3,800,000			3,800,000			700,000
Liabilities, Fair Value Disclosure
Risk Management Liabilities	[7],[13]	5,000,000.0			5,000,000.0			4,600,000
Appalachian Power Co [Member] | Risk Management Commodity Contracts [Member] | Level 3 [Member]
Risk Management Assets	[7],[13]	45,200,000			45,200,000			69,400,000
Risk Management Liabilities	[7],[13]	100,000			100,000			300,000
Risk Management Assets
Risk Management Assets	[7],[13]	45,200,000			45,200,000			69,400,000
Liabilities, Fair Value Disclosure
Risk Management Liabilities	[7],[13]	100,000			100,000			300,000
Appalachian Power Co [Member] | FTRs [Member] | Level 3 [Member]
Risk Management Assets		45,200,000			45,200,000			69,400,000
Risk Management Liabilities		100,000			100,000			300,000
Risk Management Assets
Risk Management Assets		45,200,000			45,200,000			69,400,000
Liabilities, Fair Value Disclosure
Risk Management Liabilities		100,000			100,000			300,000
Appalachian Power Co [Member] | FTRs [Member] | Weighted Average [Member] | Level 3 [Member]
Fair Value Significant Unobservable Input Price Per Unit	[10],[11]	1.63			1.63			3.89
Level 3 Quantitative Information
Fair Value Significant Unobservable Input Price Per Unit	[10],[11]	1.63			1.63			3.89
Appalachian Power Co [Member] | FTRs [Member] | Low [Member] | Level 3 [Member]
Fair Value Significant Unobservable Input Price Per Unit	[10]	(3.92)			(3.92)			(2.82)
Level 3 Quantitative Information
Fair Value Significant Unobservable Input Price Per Unit	[10]	(3.92)			(3.92)			(2.82)
Appalachian Power Co [Member] | FTRs [Member] | High [Member] | Level 3 [Member]
Fair Value Significant Unobservable Input Price Per Unit	[10]	9.08			9.08			18.88
Level 3 Quantitative Information
Fair Value Significant Unobservable Input Price Per Unit	[10]	9.08			9.08			18.88
Indiana Michigan Power Co [Member] | Other [Member]
Spent Nuclear Fuel and Decommissioning Trusts
Spent Nuclear Fuel and Decommissioning Trusts		10,500,000			10,500,000			9,900,000
Total Assets		5,700,000			5,700,000			8,700,000
Indiana Michigan Power Co [Member]
Spent Nuclear Fuel and Decommissioning Trusts
Spent Nuclear Fuel and Decommissioning Trusts		3,539,700,000			3,539,700,000			3,341,200,000
Total Assets		3,560,900,000			3,560,900,000			3,356,600,000
Changes in the Fair Value of Net Trading Derivatives and other investments
Beginning Balance		6,800,000		9,800,000	4,600,000		(700,000)
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Earnings	[1],[2]	2,300,000		2,100,000	(1,700,000)		3,700,000
Unrealized Gain (Loss) Included in Net Income (or Changes in Net Assets) Relating to Assets Still Held at the Reporting Date	[1]	0		0	0		0
Realized and Unrealized Gains (Losses) Included in Other Comprehensive Income	[3]	0		0	0		0
Settlements		(3,700,000)		(4,800,000)	(2,900,000)		(3,000,000.0)
Transfers into Level 3	[4],[5]			0	0		0
Transfers out of Level 3	[5]	(100,000)		0	0		0
Changes in Fair Value Allocated to Regulated Jurisdiction	[6]	1,300,000		2,500,000	6,600,000		9,600,000
Ending Balance		6,600,000		9,600,000	6,600,000		9,600,000
Fair Value Measurements 1 (Textuals)
Total Long-term Debt Outstanding		3,443,600,000			3,443,600,000			3,260,800,000
Indiana Michigan Power Co [Member] | Level 1 [Member]
Spent Nuclear Fuel and Decommissioning Trusts
Spent Nuclear Fuel and Decommissioning Trusts		2,184,500,000			2,184,500,000			2,142,600,000
Total Assets		2,184,500,000			2,184,500,000			2,142,600,000
Indiana Michigan Power Co [Member] | Level 2 [Member]
Spent Nuclear Fuel and Decommissioning Trusts
Spent Nuclear Fuel and Decommissioning Trusts		1,344,700,000			1,344,700,000			1,188,700,000
Total Assets		1,362,800,000			1,362,800,000			1,200,000,000
Indiana Michigan Power Co [Member] | Level 3 [Member]
Spent Nuclear Fuel and Decommissioning Trusts
Spent Nuclear Fuel and Decommissioning Trusts		0			0			0
Total Assets		7,900,000			7,900,000			5,300,000
Indiana Michigan Power Co [Member] | Risk Management Commodity Contracts [Member] | Other [Member]
Risk Management Assets	[7],[13]	(4,800,000)			(4,800,000)			(1,200,000)
Risk Management Liabilities	[7],[13]	(4,400,000)			(4,400,000)			(1,300,000)
Risk Management Assets
Risk Management Assets	[7],[13]	(4,800,000)			(4,800,000)			(1,200,000)
Liabilities, Fair Value Disclosure
Risk Management Liabilities	[7],[13]	(4,400,000)			(4,400,000)			(1,300,000)
Indiana Michigan Power Co [Member] | Risk Management Commodity Contracts [Member]
Risk Management Assets	[7],[13]	21,200,000			21,200,000			15,400,000
Risk Management Liabilities	[7],[13]	1,100,000			1,100,000			0
Risk Management Assets
Risk Management Assets	[7],[13]	21,200,000			21,200,000			15,400,000
Liabilities, Fair Value Disclosure
Risk Management Liabilities	[7],[13]	1,100,000			1,100,000			0
Indiana Michigan Power Co [Member] | Risk Management Commodity Contracts [Member] | Level 1 [Member]
Risk Management Assets	[7],[13]	0			0			0
Risk Management Liabilities	[7],[13]	0			0			0
Risk Management Assets
Risk Management Assets	[7],[13]	0			0			0
Liabilities, Fair Value Disclosure
Risk Management Liabilities	[7],[13]	0			0			0
Indiana Michigan Power Co [Member] | Risk Management Commodity Contracts [Member] | Level 2 [Member]
Risk Management Assets	[7],[13]	18,100,000			18,100,000			11,300,000
Risk Management Liabilities	[7],[13]	4,200,000			4,200,000			600,000
Risk Management Assets
Risk Management Assets	[7],[13]	18,100,000			18,100,000			11,300,000
Liabilities, Fair Value Disclosure
Risk Management Liabilities	[7],[13]	4,200,000			4,200,000			600,000
Indiana Michigan Power Co [Member] | Risk Management Commodity Contracts [Member] | Level 3 [Member]
Risk Management Assets	[7],[13]	7,900,000			7,900,000			5,300,000
Risk Management Liabilities	[7],[13]	1,300,000			1,300,000			700,000
Risk Management Assets
Risk Management Assets	[7],[13]	7,900,000			7,900,000			5,300,000
Liabilities, Fair Value Disclosure
Risk Management Liabilities	[7],[13]	1,300,000			1,300,000			700,000
Indiana Michigan Power Co [Member] | FTRs [Member] | Level 3 [Member]
Risk Management Assets		7,900,000			7,900,000			5,300,000
Risk Management Liabilities		1,300,000			1,300,000			700,000
Risk Management Assets
Risk Management Assets		7,900,000			7,900,000			5,300,000
Liabilities, Fair Value Disclosure
Risk Management Liabilities		1,300,000			1,300,000			700,000
Indiana Michigan Power Co [Member] | FTRs [Member] | Weighted Average [Member] | Level 3 [Member]
Fair Value Significant Unobservable Input Price Per Unit	[10],[11]	1.08			1.08			1.23
Level 3 Quantitative Information
Fair Value Significant Unobservable Input Price Per Unit	[10],[11]	1.08			1.08			1.23
Indiana Michigan Power Co [Member] | FTRs [Member] | Low [Member] | Level 3 [Member]
Fair Value Significant Unobservable Input Price Per Unit	[10]	(4.36)			(4.36)			0.16
Level 3 Quantitative Information
Fair Value Significant Unobservable Input Price Per Unit	[10]	(4.36)			(4.36)			0.16
Indiana Michigan Power Co [Member] | FTRs [Member] | High [Member] | Level 3 [Member]
Fair Value Significant Unobservable Input Price Per Unit	[10]	9.08			9.08			18.79
Level 3 Quantitative Information
Fair Value Significant Unobservable Input Price Per Unit	[10]	9.08			9.08			18.79
Ohio Power Co [Member]
Changes in the Fair Value of Net Trading Derivatives and other investments
Beginning Balance		(54,000,000.0)		(48,400,000)	(40,000,000.0)		(92,500,000)
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Earnings	[1],[2]	0		300,000	(2,400,000)		4,600,000
Unrealized Gain (Loss) Included in Net Income (or Changes in Net Assets) Relating to Assets Still Held at the Reporting Date	[1]	0		0	0		0
Realized and Unrealized Gains (Losses) Included in Other Comprehensive Income	[3]	0		0	0		0
Settlements		1,100,000		(1,100,000)	3,500,000		200,000
Transfers into Level 3	[4],[5]			0	0		0
Transfers out of Level 3	[5]	0		0	0		0
Changes in Fair Value Allocated to Regulated Jurisdiction	[6]	1,300,000		6,000,000.0	(12,700,000)		44,500,000
Ending Balance		(51,600,000)		(43,200,000)	(51,600,000)		(43,200,000)
Fair Value Measurements 1 (Textuals)
Total Long-term Debt Outstanding		3,366,200,000			3,366,200,000			2,970,300,000
Ohio Power Co [Member] | Risk Management Commodity Contracts [Member] | Other [Member]
Risk Management Assets	[13]	0			0
Risk Management Liabilities	[13]	0			0			(300,000)	[7]
Risk Management Assets
Risk Management Assets	[13]	0			0
Liabilities, Fair Value Disclosure
Risk Management Liabilities	[13]	0			0			(300,000)	[7]
Ohio Power Co [Member] | Risk Management Commodity Contracts [Member]
Risk Management Assets	[13]	300,000			300,000
Risk Management Liabilities	[13]	51,600,000			51,600,000			39,700,000
Risk Management Assets
Risk Management Assets	[13]	300,000			300,000
Liabilities, Fair Value Disclosure
Risk Management Liabilities	[13]	51,600,000			51,600,000			39,700,000
Ohio Power Co [Member] | Risk Management Commodity Contracts [Member] | Level 1 [Member]
Risk Management Assets	[13]	0			0
Risk Management Liabilities	[13]	0			0			0
Risk Management Assets
Risk Management Assets	[13]	0			0
Liabilities, Fair Value Disclosure
Risk Management Liabilities	[13]	0			0			0
Ohio Power Co [Member] | Risk Management Commodity Contracts [Member] | Level 2 [Member]
Risk Management Assets	[13]	300,000			300,000
Risk Management Liabilities	[13]	0			0			0
Risk Management Assets
Risk Management Assets	[13]	300,000			300,000
Liabilities, Fair Value Disclosure
Risk Management Liabilities	[13]	0			0			0
Ohio Power Co [Member] | Risk Management Commodity Contracts [Member] | Level 3 [Member]
Risk Management Assets	[13]	0			0
Risk Management Liabilities	[13]	51,600,000			51,600,000			40,000,000.0
Risk Management Assets
Risk Management Assets	[13]	0			0
Liabilities, Fair Value Disclosure
Risk Management Liabilities	[13]	51,600,000			51,600,000			40,000,000.0
Ohio Power Co [Member] | Energy Contracts [Member] | Level 3 [Member]
Risk Management Assets		0			0			0
Risk Management Liabilities		51,600,000			51,600,000			40,000,000.0
Risk Management Assets
Risk Management Assets		0			0			0
Liabilities, Fair Value Disclosure
Risk Management Liabilities		51,600,000			51,600,000			40,000,000.0
Ohio Power Co [Member] | Energy Contracts [Member] | Weighted Average [Member] | Level 3 [Member]
Fair Value Significant Unobservable Input Price Per Unit	[10],[11]	41.66			41.66			48.76
Level 3 Quantitative Information
Fair Value Significant Unobservable Input Price Per Unit	[10],[11]	41.66			41.66			48.76
Ohio Power Co [Member] | Energy Contracts [Member] | Low [Member] | Level 3 [Member]
Fair Value Significant Unobservable Input Price Per Unit	[10]	19.89			19.89			2.91
Level 3 Quantitative Information
Fair Value Significant Unobservable Input Price Per Unit	[10]	19.89			19.89			2.91
Ohio Power Co [Member] | Energy Contracts [Member] | High [Member] | Level 3 [Member]
Fair Value Significant Unobservable Input Price Per Unit	[10]	65.40			65.40			187.34
Level 3 Quantitative Information
Fair Value Significant Unobservable Input Price Per Unit	[10]	65.40			65.40			187.34
Public Service Co Of Oklahoma [Member] | Other [Member]
Spent Nuclear Fuel and Decommissioning Trusts
Total Assets								(300,000)
Public Service Co Of Oklahoma [Member]
Spent Nuclear Fuel and Decommissioning Trusts
Total Assets								25,300,000
Changes in the Fair Value of Net Trading Derivatives and other investments
Beginning Balance		43,100,000		64,500,000	23,700,000		12,100,000
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Earnings	[1],[2]	14,200,000		23,800,000	3,500,000		24,200,000
Unrealized Gain (Loss) Included in Net Income (or Changes in Net Assets) Relating to Assets Still Held at the Reporting Date	[1]	0		0	0		0
Realized and Unrealized Gains (Losses) Included in Other Comprehensive Income	[3]	0		0	0		0
Settlements		(30,500,000)		(49,100,000)	(27,200,000)		(36,300,000)
Transfers into Level 3	[4],[5]			0	0		0
Transfers out of Level 3	[5]	0		0	0		0
Changes in Fair Value Allocated to Regulated Jurisdiction	[6]	400,000		5,200,000	27,200,000		44,400,000
Ending Balance		27,200,000		44,400,000	27,200,000		44,400,000
Fair Value Measurements 1 (Textuals)
Total Long-term Debt Outstanding		2,384,200,000			2,384,200,000			1,912,800,000
Public Service Co Of Oklahoma [Member] | Level 1 [Member]
Spent Nuclear Fuel and Decommissioning Trusts
Total Assets								0
Public Service Co Of Oklahoma [Member] | Level 2 [Member]
Spent Nuclear Fuel and Decommissioning Trusts
Total Assets								1,600,000
Public Service Co Of Oklahoma [Member] | Level 3 [Member]
Spent Nuclear Fuel and Decommissioning Trusts
Total Assets								24,000,000.0
Public Service Co Of Oklahoma [Member] | Risk Management Commodity Contracts [Member] | Other [Member]
Risk Management Assets	[7],[13]	(400,000)			(400,000)			1,300,000
Risk Management Liabilities	[7],[13]	(300,000)			(300,000)			(400,000)
Risk Management Assets
Risk Management Assets	[7],[13]	(400,000)			(400,000)			1,300,000
Liabilities, Fair Value Disclosure
Risk Management Liabilities	[7],[13]	(300,000)			(300,000)			(400,000)
Public Service Co Of Oklahoma [Member] | Risk Management Commodity Contracts [Member]
Risk Management Assets	[7],[13]	28,200,000			28,200,000			25,300,000
Risk Management Liabilities	[7],[13]	7,200,000			7,200,000			1,600,000
Risk Management Assets
Risk Management Assets	[7],[13]	28,200,000			28,200,000			25,300,000
Liabilities, Fair Value Disclosure
Risk Management Liabilities	[7],[13]	7,200,000			7,200,000			1,600,000
Public Service Co Of Oklahoma [Member] | Risk Management Commodity Contracts [Member] | Level 1 [Member]
Risk Management Assets	[7],[13]	0			0			0
Risk Management Liabilities	[7],[13]	0			0			0
Risk Management Assets
Risk Management Assets	[7],[13]	0			0			0
Liabilities, Fair Value Disclosure
Risk Management Liabilities	[7],[13]	0			0			0
Public Service Co Of Oklahoma [Member] | Risk Management Commodity Contracts [Member] | Level 2 [Member]
Risk Management Assets	[7],[13]	500,000			500,000			0
Risk Management Liabilities	[7],[13]	6,600,000			6,600,000			1,700,000
Risk Management Assets
Risk Management Assets	[7],[13]	500,000			500,000			0
Liabilities, Fair Value Disclosure
Risk Management Liabilities	[7],[13]	6,600,000			6,600,000			1,700,000
Public Service Co Of Oklahoma [Member] | Risk Management Commodity Contracts [Member] | Level 3 [Member]
Risk Management Assets	[7],[13]	28,100,000			28,100,000			24,000,000.0
Risk Management Liabilities	[7],[13]	900,000			900,000			300,000
Risk Management Assets
Risk Management Assets	[7],[13]	28,100,000			28,100,000			24,000,000.0
Liabilities, Fair Value Disclosure
Risk Management Liabilities	[7],[13]	900,000			900,000			300,000
Public Service Co Of Oklahoma [Member] | FTRs [Member] | Level 3 [Member]
Risk Management Assets		28,100,000			28,100,000			24,000,000.0
Risk Management Liabilities		900,000			900,000			300,000
Risk Management Assets
Risk Management Assets		28,100,000			28,100,000			24,000,000.0
Liabilities, Fair Value Disclosure
Risk Management Liabilities		900,000			900,000			300,000
Public Service Co Of Oklahoma [Member] | FTRs [Member] | Weighted Average [Member] | Level 3 [Member]
Fair Value Significant Unobservable Input Price Per Unit	[11]	(4.42)			(4.42)			(7.55)	[10]
Level 3 Quantitative Information
Fair Value Significant Unobservable Input Price Per Unit	[11]	(4.42)			(4.42)			(7.55)	[10]
Public Service Co Of Oklahoma [Member] | FTRs [Member] | Low [Member] | Level 3 [Member]
Fair Value Significant Unobservable Input Price Per Unit		(17.92)			(17.92)			(36.45)	[10]
Level 3 Quantitative Information
Fair Value Significant Unobservable Input Price Per Unit		(17.92)			(17.92)			(36.45)	[10]
Public Service Co Of Oklahoma [Member] | FTRs [Member] | High [Member] | Level 3 [Member]
Fair Value Significant Unobservable Input Price Per Unit		2.04			2.04			3.40	[10]
Level 3 Quantitative Information
Fair Value Significant Unobservable Input Price Per Unit		2.04			2.04			3.40	[10]
Public Service Co Of Oklahoma [Member] | Interest Rate [Member] | Other [Member]
Risk Management Assets								(1,600,000)
Risk Management Assets
Risk Management Assets								(1,600,000)
Public Service Co Of Oklahoma [Member] | Interest Rate [Member]
Risk Management Assets								0
Risk Management Assets
Risk Management Assets								0
Public Service Co Of Oklahoma [Member] | Interest Rate [Member] | Level 1 [Member]
Risk Management Assets								0
Risk Management Assets
Risk Management Assets								0
Public Service Co Of Oklahoma [Member] | Interest Rate [Member] | Level 2 [Member]
Risk Management Assets								1,600,000
Risk Management Assets
Risk Management Assets								1,600,000
Public Service Co Of Oklahoma [Member] | Interest Rate [Member] | Level 3 [Member]
Risk Management Assets								0
Risk Management Assets
Risk Management Assets								0
Southwestern Electric Power Co [Member]
Changes in the Fair Value of Net Trading Derivatives and other investments
Beginning Balance		26,000,000.0		45,400,000	14,200,000		10,900,000
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Earnings	[1],[2]	14,000,000.0		15,400,000	5,900,000		35,800,000
Unrealized Gain (Loss) Included in Net Income (or Changes in Net Assets) Relating to Assets Still Held at the Reporting Date	[1]	0		0	0		0
Realized and Unrealized Gains (Losses) Included in Other Comprehensive Income	[3]	0		0	0		0
Settlements		(24,800,000)		(31,600,000)	(20,000,000.0)		(45,000,000.0)
Transfers into Level 3	[4],[5]			0	0		0
Transfers out of Level 3	[5]	0		0	0		0
Changes in Fair Value Allocated to Regulated Jurisdiction	[6]	1,300,000		7,000,000.0	16,400,000		34,500,000
Ending Balance		16,500,000		$ 36,200,000	16,500,000		$ 36,200,000
Fair Value Measurements 1 (Textuals)
Total Long-term Debt Outstanding		3,646,200,000			3,646,200,000			3,391,600,000
Southwestern Electric Power Co [Member] | Risk Management Commodity Contracts [Member] | Other [Member]
Risk Management Assets	[7],[13]	(500,000)			(500,000)			(400,000)
Risk Management Liabilities	[7],[13]	(500,000)			(500,000)			(600,000)
Risk Management Assets
Risk Management Assets	[7],[13]	(500,000)			(500,000)			(400,000)
Liabilities, Fair Value Disclosure
Risk Management Liabilities	[7],[13]	(500,000)			(500,000)			(600,000)
Southwestern Electric Power Co [Member] | Risk Management Commodity Contracts [Member]
Risk Management Assets	[7],[13]	17,100,000			17,100,000			16,400,000
Risk Management Liabilities	[7],[13]	3,500,000			3,500,000			1,400,000
Risk Management Assets
Risk Management Assets	[7],[13]	17,100,000			17,100,000			16,400,000
Liabilities, Fair Value Disclosure
Risk Management Liabilities	[7],[13]	3,500,000			3,500,000			1,400,000
Southwestern Electric Power Co [Member] | Risk Management Commodity Contracts [Member] | Level 1 [Member]
Risk Management Assets	[7],[13]	0			0			0
Risk Management Liabilities	[7],[13]	0			0			0
Risk Management Assets
Risk Management Assets	[7],[13]	0			0			0
Liabilities, Fair Value Disclosure
Risk Management Liabilities	[7],[13]	0			0			0
Southwestern Electric Power Co [Member] | Risk Management Commodity Contracts [Member] | Level 2 [Member]
Risk Management Assets	[7],[13]	200,000			200,000			2,200,000
Risk Management Liabilities	[7],[13]	3,100,000			3,100,000			1,600,000
Risk Management Assets
Risk Management Assets	[7],[13]	200,000			200,000			2,200,000
Liabilities, Fair Value Disclosure
Risk Management Liabilities	[7],[13]	3,100,000			3,100,000			1,600,000
Southwestern Electric Power Co [Member] | Risk Management Commodity Contracts [Member] | Level 3 [Member]
Risk Management Assets	[7],[13]	17,400,000			17,400,000			14,600,000
Risk Management Liabilities	[7],[13]	900,000			900,000			400,000
Risk Management Assets
Risk Management Assets	[7],[13]	17,400,000			17,400,000			14,600,000
Liabilities, Fair Value Disclosure
Risk Management Liabilities	[7],[13]	900,000			900,000			400,000
Southwestern Electric Power Co [Member] | Natural Gas Contracts [Member] | Level 3 [Member]
Risk Management Assets		0			0
Risk Management Liabilities		200,000			200,000
Risk Management Assets
Risk Management Assets		0			0
Liabilities, Fair Value Disclosure
Risk Management Liabilities		200,000			200,000
Southwestern Electric Power Co [Member] | Natural Gas Contracts [Member] | Weighted Average [Member] | Level 3 [Member]
Fair Value Significant Unobservable Input Price Per Unit	[11],[12]	3.55			3.55
Level 3 Quantitative Information
Fair Value Significant Unobservable Input Price Per Unit	[11],[12]	3.55			3.55
Southwestern Electric Power Co [Member] | Natural Gas Contracts [Member] | Low [Member] | Level 3 [Member]
Fair Value Significant Unobservable Input Price Per Unit	[12]	3.55			3.55
Level 3 Quantitative Information
Fair Value Significant Unobservable Input Price Per Unit	[12]	3.55			3.55
Southwestern Electric Power Co [Member] | Natural Gas Contracts [Member] | High [Member] | Level 3 [Member]
Fair Value Significant Unobservable Input Price Per Unit	[12]	3.55			3.55
Level 3 Quantitative Information
Fair Value Significant Unobservable Input Price Per Unit	[12]	3.55			3.55
Southwestern Electric Power Co [Member] | FTRs [Member] | Level 3 [Member]
Risk Management Assets		17,400,000			17,400,000			14,600,000
Risk Management Liabilities		700,000			700,000			400,000
Risk Management Assets
Risk Management Assets		17,400,000			17,400,000			14,600,000
Liabilities, Fair Value Disclosure
Risk Management Liabilities		700,000			700,000			400,000
Southwestern Electric Power Co [Member] | FTRs [Member] | Weighted Average [Member] | Level 3 [Member]
Fair Value Significant Unobservable Input Price Per Unit	[10],[11]	(4.42)			(4.42)			(7.55)
Level 3 Quantitative Information
Fair Value Significant Unobservable Input Price Per Unit	[10],[11]	(4.42)			(4.42)			(7.55)
Southwestern Electric Power Co [Member] | FTRs [Member] | Low [Member] | Level 3 [Member]
Fair Value Significant Unobservable Input Price Per Unit	[10]	(17.92)			(17.92)			(36.45)
Level 3 Quantitative Information
Fair Value Significant Unobservable Input Price Per Unit	[10]	(17.92)			(17.92)			(36.45)
Southwestern Electric Power Co [Member] | FTRs [Member] | High [Member] | Level 3 [Member]
Fair Value Significant Unobservable Input Price Per Unit	[10]	2.04			2.04			3.40
Level 3 Quantitative Information
Fair Value Significant Unobservable Input Price Per Unit	[10]	2.04			2.04			3.40
Cash [Member] | Other [Member]
Assets, Fair Value Disclosure
Cash and Cash Equivalents		0			0			0
Cash [Member]
Assets, Fair Value Disclosure
Cash and Cash Equivalents		53,800,000			53,800,000			47,100,000
Other Short-term Investments	[14]	53,800,000			53,800,000			47,100,000
Cash [Member] | Level 1 [Member]
Assets, Fair Value Disclosure
Cash and Cash Equivalents		53,800,000			53,800,000			47,100,000
Cash [Member] | Level 2 [Member]
Assets, Fair Value Disclosure
Cash and Cash Equivalents		0			0			0
Cash [Member] | Level 3 [Member]
Assets, Fair Value Disclosure
Cash and Cash Equivalents		0			0			0
Other Cash Deposits [Member] | Other [Member]
Assets, Fair Value Disclosure
Other Short-term Investments	[15]	13,400,000			13,400,000			9,000,000.0
Other Cash Deposits [Member]
Assets, Fair Value Disclosure
Other Short-term Investments		13,400,000			13,400,000			9,000,000.0
Other Cash Deposits [Member] | Level 1 [Member]
Assets, Fair Value Disclosure
Other Short-term Investments		0			0			0
Other Cash Deposits [Member] | Level 2 [Member]
Assets, Fair Value Disclosure
Other Short-term Investments		0			0			0
Other Cash Deposits [Member] | Level 3 [Member]
Assets, Fair Value Disclosure
Other Short-term Investments		0			0			0
Mutual Funds Fixed Income [Member] | Other [Member]
Assets, Fair Value Disclosure
Other Short-term Investments		0			0			0
Mutual Funds Fixed Income [Member]
Assets, Fair Value Disclosure
Other Short-term Investments	[16]	160,000,000.0			160,000,000.0			144,100,000
Mutual Funds Fixed Income [Member] | Level 1 [Member]
Assets, Fair Value Disclosure
Other Short-term Investments		160,000,000.0			160,000,000.0			144,100,000
Mutual Funds Fixed Income [Member] | Level 2 [Member]
Assets, Fair Value Disclosure
Other Short-term Investments		0			0			0
Mutual Funds Fixed Income [Member] | Level 3 [Member]
Assets, Fair Value Disclosure
Other Short-term Investments		0			0			0
Mutual Funds Equity [Member] | Other [Member]
Assets, Fair Value Disclosure
Other Short-term Investments	[17]	0			0			0
Mutual Funds Equity [Member]
Assets, Fair Value Disclosure
Other Short-term Investments	[17]	37,600,000			37,600,000			34,500,000
Mutual Funds Equity [Member] | Level 1 [Member]
Assets, Fair Value Disclosure
Other Short-term Investments	[17]	37,600,000			37,600,000			34,500,000
Mutual Funds Equity [Member] | Level 2 [Member]
Assets, Fair Value Disclosure
Other Short-term Investments	[17]	0			0			0
Mutual Funds Equity [Member] | Level 3 [Member]
Assets, Fair Value Disclosure
Other Short-term Investments	[17]	0			0			0
Cash and Cash Equivalents [Member] | Other [Member]
Spent Nuclear Fuel and Decommissioning Trusts
Spent Nuclear Fuel and Decommissioning Trusts	[18]	10,500,000			10,500,000			9,900,000
Cash and Cash Equivalents [Member]
Spent Nuclear Fuel and Decommissioning Trusts
Spent Nuclear Fuel and Decommissioning Trusts	[18]	20,500,000			20,500,000			21,200,000
Cash and Cash Equivalents [Member] | Level 1 [Member]
Spent Nuclear Fuel and Decommissioning Trusts
Spent Nuclear Fuel and Decommissioning Trusts	[18]	10,000,000.0			10,000,000.0			11,300,000
Cash and Cash Equivalents [Member] | Level 2 [Member]
Spent Nuclear Fuel and Decommissioning Trusts
Spent Nuclear Fuel and Decommissioning Trusts	[18]	0			0			0
Cash and Cash Equivalents [Member] | Level 3 [Member]
Spent Nuclear Fuel and Decommissioning Trusts
Spent Nuclear Fuel and Decommissioning Trusts	[18]	0			0			0
Cash and Cash Equivalents [Member] | Indiana Michigan Power Co [Member] | Other [Member]
Spent Nuclear Fuel and Decommissioning Trusts
Spent Nuclear Fuel and Decommissioning Trusts	[18]	10,500,000			10,500,000			9,900,000
Cash and Cash Equivalents [Member] | Indiana Michigan Power Co [Member]
Spent Nuclear Fuel and Decommissioning Trusts
Spent Nuclear Fuel and Decommissioning Trusts	[18]	20,500,000			20,500,000			21,200,000
Cash and Cash Equivalents [Member] | Indiana Michigan Power Co [Member] | Level 1 [Member]
Spent Nuclear Fuel and Decommissioning Trusts
Spent Nuclear Fuel and Decommissioning Trusts	[18]	10,000,000.0			10,000,000.0			11,300,000
Cash and Cash Equivalents [Member] | Indiana Michigan Power Co [Member] | Level 2 [Member]
Spent Nuclear Fuel and Decommissioning Trusts
Spent Nuclear Fuel and Decommissioning Trusts	[18]	0			0			0
Cash and Cash Equivalents [Member] | Indiana Michigan Power Co [Member] | Level 3 [Member]
Spent Nuclear Fuel and Decommissioning Trusts
Spent Nuclear Fuel and Decommissioning Trusts	[18]	0			0			0
US Government Agencies Debt Securities [Member] | Other [Member]
Spent Nuclear Fuel and Decommissioning Trusts
Spent Nuclear Fuel and Decommissioning Trusts		0			0			0
US Government Agencies Debt Securities [Member]
Spent Nuclear Fuel and Decommissioning Trusts
Spent Nuclear Fuel and Decommissioning Trusts		1,204,700,000			1,204,700,000			1,123,800,000
US Government Agencies Debt Securities [Member] | Level 1 [Member]
Spent Nuclear Fuel and Decommissioning Trusts
Spent Nuclear Fuel and Decommissioning Trusts		0			0			0
US Government Agencies Debt Securities [Member] | Level 2 [Member]
Spent Nuclear Fuel and Decommissioning Trusts
Spent Nuclear Fuel and Decommissioning Trusts		1,204,700,000			1,204,700,000			1,123,800,000
US Government Agencies Debt Securities [Member] | Level 3 [Member]
Spent Nuclear Fuel and Decommissioning Trusts
Spent Nuclear Fuel and Decommissioning Trusts		0			0			0
US Government Agencies Debt Securities [Member] | Indiana Michigan Power Co [Member] | Other [Member]
Spent Nuclear Fuel and Decommissioning Trusts
Spent Nuclear Fuel and Decommissioning Trusts		0			0			0
US Government Agencies Debt Securities [Member] | Indiana Michigan Power Co [Member]
Spent Nuclear Fuel and Decommissioning Trusts
Spent Nuclear Fuel and Decommissioning Trusts		1,204,700,000			1,204,700,000			1,123,800,000
US Government Agencies Debt Securities [Member] | Indiana Michigan Power Co [Member] | Level 1 [Member]
Spent Nuclear Fuel and Decommissioning Trusts
Spent Nuclear Fuel and Decommissioning Trusts		0			0			0
US Government Agencies Debt Securities [Member] | Indiana Michigan Power Co [Member] | Level 2 [Member]
Spent Nuclear Fuel and Decommissioning Trusts
Spent Nuclear Fuel and Decommissioning Trusts		1,204,700,000			1,204,700,000			1,123,800,000
US Government Agencies Debt Securities [Member] | Indiana Michigan Power Co [Member] | Level 3 [Member]
Spent Nuclear Fuel and Decommissioning Trusts
Spent Nuclear Fuel and Decommissioning Trusts		0			0			0
Corporate Debt [Member] | Other [Member]
Spent Nuclear Fuel and Decommissioning Trusts
Spent Nuclear Fuel and Decommissioning Trusts		0			0			0
Corporate Debt [Member]
Spent Nuclear Fuel and Decommissioning Trusts
Spent Nuclear Fuel and Decommissioning Trusts		136,800,000			136,800,000			61,600,000
Corporate Debt [Member] | Level 1 [Member]
Spent Nuclear Fuel and Decommissioning Trusts
Spent Nuclear Fuel and Decommissioning Trusts		0			0			0
Corporate Debt [Member] | Level 2 [Member]
Spent Nuclear Fuel and Decommissioning Trusts
Spent Nuclear Fuel and Decommissioning Trusts		136,800,000			136,800,000			61,600,000
Corporate Debt [Member] | Level 3 [Member]
Spent Nuclear Fuel and Decommissioning Trusts
Spent Nuclear Fuel and Decommissioning Trusts		0			0			0
Corporate Debt [Member] | Indiana Michigan Power Co [Member] | Other [Member]
Spent Nuclear Fuel and Decommissioning Trusts
Spent Nuclear Fuel and Decommissioning Trusts		0			0			0
Corporate Debt [Member] | Indiana Michigan Power Co [Member]
Spent Nuclear Fuel and Decommissioning Trusts
Spent Nuclear Fuel and Decommissioning Trusts		136,800,000			136,800,000			61,600,000
Corporate Debt [Member] | Indiana Michigan Power Co [Member] | Level 1 [Member]
Spent Nuclear Fuel and Decommissioning Trusts
Spent Nuclear Fuel and Decommissioning Trusts		0			0			0
Corporate Debt [Member] | Indiana Michigan Power Co [Member] | Level 2 [Member]
Spent Nuclear Fuel and Decommissioning Trusts
Spent Nuclear Fuel and Decommissioning Trusts		136,800,000			136,800,000			61,600,000
Corporate Debt [Member] | Indiana Michigan Power Co [Member] | Level 3 [Member]
Spent Nuclear Fuel and Decommissioning Trusts
Spent Nuclear Fuel and Decommissioning Trusts		0			0			0
State and Local Jurisdiction [Member] | Other [Member]
Spent Nuclear Fuel and Decommissioning Trusts
Spent Nuclear Fuel and Decommissioning Trusts		0			0			0
State and Local Jurisdiction [Member]
Spent Nuclear Fuel and Decommissioning Trusts
Spent Nuclear Fuel and Decommissioning Trusts		3,200,000			3,200,000			3,300,000
State and Local Jurisdiction [Member] | Level 1 [Member]
Spent Nuclear Fuel and Decommissioning Trusts
Spent Nuclear Fuel and Decommissioning Trusts		0			0			0
State and Local Jurisdiction [Member] | Level 2 [Member]
Spent Nuclear Fuel and Decommissioning Trusts
Spent Nuclear Fuel and Decommissioning Trusts		3,200,000			3,200,000			3,300,000
State and Local Jurisdiction [Member] | Level 3 [Member]
Spent Nuclear Fuel and Decommissioning Trusts
Spent Nuclear Fuel and Decommissioning Trusts		0			0			0
State and Local Jurisdiction [Member] | Indiana Michigan Power Co [Member] | Other [Member]
Spent Nuclear Fuel and Decommissioning Trusts
Spent Nuclear Fuel and Decommissioning Trusts		0			0			0
State and Local Jurisdiction [Member] | Indiana Michigan Power Co [Member]
Spent Nuclear Fuel and Decommissioning Trusts
Spent Nuclear Fuel and Decommissioning Trusts		3,200,000			3,200,000			3,300,000
State and Local Jurisdiction [Member] | Indiana Michigan Power Co [Member] | Level 1 [Member]
Spent Nuclear Fuel and Decommissioning Trusts
Spent Nuclear Fuel and Decommissioning Trusts		0			0			0
State and Local Jurisdiction [Member] | Indiana Michigan Power Co [Member] | Level 2 [Member]
Spent Nuclear Fuel and Decommissioning Trusts
Spent Nuclear Fuel and Decommissioning Trusts		3,200,000			3,200,000			3,300,000
State and Local Jurisdiction [Member] | Indiana Michigan Power Co [Member] | Level 3 [Member]
Spent Nuclear Fuel and Decommissioning Trusts
Spent Nuclear Fuel and Decommissioning Trusts		0			0			0
Fixed Income Funds [Member] | Other [Member]
Spent Nuclear Fuel and Decommissioning Trusts
Spent Nuclear Fuel and Decommissioning Trusts		0			0			0
Fixed Income Funds [Member]
Spent Nuclear Fuel and Decommissioning Trusts
Spent Nuclear Fuel and Decommissioning Trusts		1,344,700,000			1,344,700,000			1,188,700,000
Fixed Income Funds [Member] | Level 1 [Member]
Spent Nuclear Fuel and Decommissioning Trusts
Spent Nuclear Fuel and Decommissioning Trusts		0			0			0
Fixed Income Funds [Member] | Level 2 [Member]
Spent Nuclear Fuel and Decommissioning Trusts
Spent Nuclear Fuel and Decommissioning Trusts		1,344,700,000			1,344,700,000			1,188,700,000
Fixed Income Funds [Member] | Level 3 [Member]
Spent Nuclear Fuel and Decommissioning Trusts
Spent Nuclear Fuel and Decommissioning Trusts		0			0			0
Fixed Income Funds [Member] | Indiana Michigan Power Co [Member] | Other [Member]
Spent Nuclear Fuel and Decommissioning Trusts
Spent Nuclear Fuel and Decommissioning Trusts		0			0			0
Fixed Income Funds [Member] | Indiana Michigan Power Co [Member]
Spent Nuclear Fuel and Decommissioning Trusts
Spent Nuclear Fuel and Decommissioning Trusts		1,344,700,000			1,344,700,000			1,188,700,000
Fixed Income Funds [Member] | Indiana Michigan Power Co [Member] | Level 1 [Member]
Spent Nuclear Fuel and Decommissioning Trusts
Spent Nuclear Fuel and Decommissioning Trusts		0			0			0
Fixed Income Funds [Member] | Indiana Michigan Power Co [Member] | Level 2 [Member]
Spent Nuclear Fuel and Decommissioning Trusts
Spent Nuclear Fuel and Decommissioning Trusts		1,344,700,000			1,344,700,000			1,188,700,000
Fixed Income Funds [Member] | Indiana Michigan Power Co [Member] | Level 3 [Member]
Spent Nuclear Fuel and Decommissioning Trusts
Spent Nuclear Fuel and Decommissioning Trusts		0			0			0
Domestic [Member] | Other [Member]
Spent Nuclear Fuel and Decommissioning Trusts
Spent Nuclear Fuel and Decommissioning Trusts	[17]	0			0			0
Domestic [Member]
Spent Nuclear Fuel and Decommissioning Trusts
Spent Nuclear Fuel and Decommissioning Trusts	[17]	2,174,500,000			2,174,500,000			2,131,300,000
Domestic [Member] | Level 1 [Member]
Spent Nuclear Fuel and Decommissioning Trusts
Spent Nuclear Fuel and Decommissioning Trusts	[17]	2,174,500,000			2,174,500,000			2,131,300,000
Domestic [Member] | Level 2 [Member]
Spent Nuclear Fuel and Decommissioning Trusts
Spent Nuclear Fuel and Decommissioning Trusts	[17]	0			0			0
Domestic [Member] | Level 3 [Member]
Spent Nuclear Fuel and Decommissioning Trusts
Spent Nuclear Fuel and Decommissioning Trusts	[17]	0			0			0
Domestic [Member] | Indiana Michigan Power Co [Member] | Other [Member]
Spent Nuclear Fuel and Decommissioning Trusts
Spent Nuclear Fuel and Decommissioning Trusts	[17]	0			0			0
Domestic [Member] | Indiana Michigan Power Co [Member]
Spent Nuclear Fuel and Decommissioning Trusts
Spent Nuclear Fuel and Decommissioning Trusts	[17]	2,174,500,000			2,174,500,000			2,131,300,000
Domestic [Member] | Indiana Michigan Power Co [Member] | Level 1 [Member]
Spent Nuclear Fuel and Decommissioning Trusts
Spent Nuclear Fuel and Decommissioning Trusts	[17]	2,174,500,000			2,174,500,000			2,131,300,000
Domestic [Member] | Indiana Michigan Power Co [Member] | Level 2 [Member]
Spent Nuclear Fuel and Decommissioning Trusts
Spent Nuclear Fuel and Decommissioning Trusts	[17]	0			0			0
Domestic [Member] | Indiana Michigan Power Co [Member] | Level 3 [Member]
Spent Nuclear Fuel and Decommissioning Trusts
Spent Nuclear Fuel and Decommissioning Trusts	[17]	$ 0			$ 0			$ 0

[1] Included in revenues on the statements of income.

[2] Represents the change in fair value between the beginning of the reporting period and the settlement of the risk management commodity contract.

[3] Included in cash flow hedges on the statements of comprehensive income.

[4] Represents existing assets or liabilities that were previously categorized as Level 2.

[5] Transfers are recognized based on their value at the beginning of the reporting period that the transfer occurred.

[6] Relates to the net gains (losses) of those contracts that are not reflected on the statements of income.  These changes in fair value are recorded as regulatory liabilities for net gains and as regulatory assets for net losses or accounts payable.

[7] Amounts in “Other’’ column primarily represent counterparty netting of risk management and hedging contracts and associated cash collateral under the accounting guidance for “Derivatives and Hedging.’’

[8] The September 30, 2023 maturities of the net fair value of risk management contracts prior to cash collateral, assets/(liabilities), were as follows: Level 1 matures $(4) million in 2023 and $(9) million in periods 2024-2026; Level 2 matures $64 million in periods 2024-2026, $10 million in periods 2027-2028 and $1 million in periods 2029-2033; Level 3 matures $37 million in 2023, $118 million in periods 2024-2026, $18 million in periods 2027-2028 and $(9) million in periods 2029-2033.  Risk management commodity contracts are substantially comprised of power contracts.

[9] The December 31, 2022 maturities of the net fair value of risk management contracts prior to cash collateral, assets/(liabilities), were as follows: Level 1 matures $(7) million in 2023; Level 2 matures $182 million in 2023, $134 million in periods 2024-2026, $10 million in periods 2027-2028 and $1 million in periods 2029-2033; Level 3 matures $128 million in 2023, $6 million in periods 2024-2026, $6 million in periods 2027-2028 and $(5) million in periods 2029-2033.  Risk management commodity contracts are substantially comprised of power contracts.

[10] Represents market prices in dollars per MWh.

[11] The weighted average is the product of the forward market price of the underlying commodity and volume weighted by term.

[12] Represents market prices in dollars per MMBtu.

[13] Substantially comprised of power contracts for the Registrant Subsidiaries.

[14] Primarily represents amounts held for the repayment of debt.

[15] Amounts in “Other’’ column primarily represent cash deposits in bank accounts with financial institutions or third-parties.  Level 1 and Level 2 amounts primarily represent investments in money market funds.

[16] Primarily short and intermediate maturities which may be sold and do not contain maturity dates.

[17] Amounts represent publicly traded equity securities and equity-based mutual funds.

[18] Amounts in “Other’’ column primarily represent accrued interest receivables from financial institutions.  Level 1 amounts primarily represent investments in money market funds.

XML

Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Effective Income Tax Rate Reconciliation, Percent [Abstract]
U.S. Federal Statutory Rate	21.00%	21.00%	21.00%	21.00%
State Income Tax, net of Federal Benefit	1.40%	(0.80%)	1.70%	0.70%
Tax Reform Excess ADIT Reversal	(5.70%)	(9.70%)	(6.00%)	(7.80%)
Production and Investment Tax Credits	(5.10%)	(12.00%)	(7.40%)	(8.70%)
Flow Through	0.10%	(0.30%)	(0.20%)	0.00%
AFUDC Equity	(1.40%)	(1.40%)	(1.40%)	(1.10%)
Discrete Tax Adjustments	(4.10%)	(0.20%)	(2.80%)	(0.20%)
Other	0.10%	1.00%	0.30%	0.60%
Effective Income Tax Rate	6.30%	(2.40%)	5.20%	4.50%
Income Taxes (Textuals) [Abstract]
corporate alternative minimum tax			15.00%
Production Tax Credit Proceeds			$ 80.0
AEP Texas Inc. [Member]
Effective Income Tax Rate Reconciliation, Percent [Abstract]
U.S. Federal Statutory Rate	21.00%	21.00%	21.00%	21.00%
State Income Tax, net of Federal Benefit	0.50%	0.50%	0.50%	0.50%
Tax Reform Excess ADIT Reversal	(1.30%)	(2.00%)	(1.30%)	(2.00%)
Production and Investment Tax Credits	0.10%	(0.40%)	0.00%	(0.40%)
Flow Through	0.20%	0.20%	0.20%	0.20%
AFUDC Equity	(1.40%)	(1.20%)	(1.20%)	(1.20%)
Discrete Tax Adjustments	0.00%	0.00%	0.00%	0.00%
Other	(0.50%)	0.20%	(0.20%)	0.10%
Effective Income Tax Rate	18.60%	18.30%	19.00%	18.20%
AEP Transmission Co [Member]
Effective Income Tax Rate Reconciliation, Percent [Abstract]
U.S. Federal Statutory Rate	21.00%	21.00%	21.00%	21.00%
State Income Tax, net of Federal Benefit	2.80%	2.60%	2.70%	2.70%
Tax Reform Excess ADIT Reversal	(0.20%)	0.30%	0.10%	0.30%
Production and Investment Tax Credits	0.00%	0.00%	0.00%	0.00%
Flow Through	0.30%	0.30%	0.30%	0.30%
AFUDC Equity	(2.40%)	(1.90%)	(2.00%)	(1.90%)
Discrete Tax Adjustments	0.00%	0.00%	0.00%	0.00%
Other	(1.00%)	0.20%	(0.50%)	0.10%
Effective Income Tax Rate	20.50%	22.50%	21.60%	22.50%
Appalachian Power Co [Member]
Effective Income Tax Rate Reconciliation, Percent [Abstract]
U.S. Federal Statutory Rate	21.00%	21.00%	21.00%	21.00%
State Income Tax, net of Federal Benefit	2.20%	(6.20%)	2.40%	(0.80%)
Tax Reform Excess ADIT Reversal	(5.30%)	(8.60%)	(4.80%)	(10.30%)
Production and Investment Tax Credits	(0.10%)	0.00%	(0.10%)	0.00%
Flow Through	1.80%	(0.70%)	0.10%	0.20%
AFUDC Equity	(1.50%)	(0.40%)	(1.20%)	(0.80%)
Discrete Tax Adjustments	0.00%	0.00%	1.50%	(1.80%)
Other	0.70%	0.00%	0.40%	0.00%
Effective Income Tax Rate	18.80%	5.10%	19.30%	7.50%
Indiana Michigan Power Co [Member]
Effective Income Tax Rate Reconciliation, Percent [Abstract]
U.S. Federal Statutory Rate	21.00%	21.00%	21.00%	21.00%
State Income Tax, net of Federal Benefit	2.10%	2.70%	2.30%	1.30%
Tax Reform Excess ADIT Reversal	(8.50%)	(13.30%)	(7.60%)	(15.70%)
Production and Investment Tax Credits	(0.70%)	0.00%	(0.60%)	(1.40%)
Flow Through	0.70%	(1.50%)	(1.70%)	(1.60%)
AFUDC Equity	(0.50%)	(0.60%)	(0.40%)	(0.80%)
Discrete Tax Adjustments	0.00%	0.00%	0.70%	0.00%
Other	(3.50%)	(0.50%)	(1.20%)	0.20%
Effective Income Tax Rate	10.60%	7.80%	12.50%	3.00%
Ohio Power Co [Member]
Effective Income Tax Rate Reconciliation, Percent [Abstract]
U.S. Federal Statutory Rate	21.00%	21.00%	21.00%	21.00%
State Income Tax, net of Federal Benefit	0.80%	0.70%	0.90%	0.80%
Tax Reform Excess ADIT Reversal	(6.80%)	(6.20%)	(7.30%)	(7.30%)
Production and Investment Tax Credits	0.00%	0.00%	0.00%	0.00%
Flow Through	0.80%	0.40%	0.80%	0.50%
AFUDC Equity	(0.80%)	(0.80%)	(0.80%)	(0.70%)
Discrete Tax Adjustments	0.00%	0.00%	0.00%	0.00%
Other	1.30%	0.20%	0.50%	0.10%
Effective Income Tax Rate	16.30%	15.30%	15.10%	14.40%
Public Service Co Of Oklahoma [Member]
Effective Income Tax Rate Reconciliation, Percent [Abstract]
U.S. Federal Statutory Rate	21.00%	21.00%	21.00%	21.00%
State Income Tax, net of Federal Benefit	3.00%	3.00%	2.80%	3.20%
Tax Reform Excess ADIT Reversal	(17.00%)	(21.90%)	(17.10%)	(20.80%)
Production and Investment Tax Credits	(46.90%)	(43.70%)	(48.90%)	(39.50%)
Flow Through	0.30%	0.40%	0.30%	0.30%
AFUDC Equity	(1.60%)	(0.40%)	(1.50%)	(0.40%)
Discrete Tax Adjustments	0.00%	0.00%	0.00%	0.00%
Other	(0.20%)	0.20%	(0.20%)	0.20%
Effective Income Tax Rate	(41.40%)	(41.40%)	(43.60%)	(36.00%)
Southwestern Electric Power Co [Member]
Effective Income Tax Rate Reconciliation, Percent [Abstract]
U.S. Federal Statutory Rate	21.00%	21.00%	21.00%	21.00%
State Income Tax, net of Federal Benefit	(4.30%)	(5.30%)	(2.90%)	(1.50%)
Tax Reform Excess ADIT Reversal	(6.20%)	(4.60%)	(5.30%)	(4.80%)
Production and Investment Tax Credits	(25.50%)	(24.10%)	(26.70%)	(22.50%)
Flow Through	(0.20%)	(1.30%)	(0.30%)	(0.80%)
AFUDC Equity	(0.80%)	(0.20%)	(0.50%)	(0.40%)
Discrete Tax Adjustments	0.00%	0.00%	0.00%	0.30%
Other	0.20%	(0.20%)	0.20%	0.00%
Effective Income Tax Rate	(15.80%)	(14.70%)	(14.50%)	(8.70%)

XML

Financing Activities (Details) - USD ($)				1 Months Ended	3 Months Ended								9 Months Ended
		Nov. 02, 2023	Mar. 15, 2023	Oct. 31, 2023	Sep. 30, 2023		Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2022		Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2023		Sep. 30, 2022		Dec. 31, 2022
Long-term Debt
Senior Unsecured Notes					$ 32,881,600,000								$ 32,881,600,000				$ 30,174,800,000
Pollution Control Bonds					1,771,000,000								1,771,000,000				1,770,200,000
Notes Payable					141,500,000								141,500,000				269,700,000
Securitization Bonds					407,000,000.0								407,000,000.0				487,800,000
Spent Nuclear Fuel Obligation	[1]				296,300,000								296,300,000				285,600,000
Junior Subordinated Notes	[2]				2,386,600,000								2,386,600,000				2,381,300,000
Other Long-term Debt					1,605,100,000								1,605,100,000				1,431,600,000
Total Long-term Debt Outstanding					39,489,100,000								39,489,100,000				36,801,000,000
Long-term Debt Due Within One Year					2,773,600,000								2,773,600,000				2,486,400,000
Long-term Debt					36,715,500,000								36,715,500,000				34,314,600,000
Long-term Debt and Other Securities Issued, Retired and Principal Payments Made
Proceeds from Issuance of Debt	[3]												4,064,000,000
Repayments of Long-term Debt													1,353,300,000		$ 1,679,100,000
Short-term Debt:
Securitized Debt for Receivables	[4]				900,000,000.0								900,000,000.0				750,000,000.0
Commercial Paper					1,826,500,000								1,826,500,000				2,862,200,000
Total Short-term Debt					$ 2,730,400,000								$ 2,730,400,000				$ 4,112,200,000
Securitized Debt for Receivables	[4],[5]				5.60%								5.60%				4.67%
Comparative Accounts Receivable Information
Effective Interest Rates on Securitization of Accounts Receivable					5.55%				2.25%				5.23%		1.16%
Net Uncollectible Accounts Receivable Written Off					$ 8,800,000				$ 9,500,000				$ 22,900,000		$ 23,100,000
Customer Accounts Receivable Managed Portfolio
Accounts Receivable Retained Interest and Pledged as Collateral Less Uncollectible Accounts					1,257,000,000								1,257,000,000				$ 1,167,700,000
Total Principal Outstanding					900,000,000.0								900,000,000.0				750,000,000.0
Delinquent Securitized Accounts Receivable					59,500,000								59,500,000				44,200,000
Bad Debt Reserves Related to Securitization, Sale of Accounts Receivable					42,200,000								42,200,000				39,700,000
Unbilled Receivables Related to Securitization, Sale of Accounts Receivable					301,800,000								301,800,000				$ 360,900,000
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					5,341,700,000				5,526,100,000				14,405,100,000		14,758,400,000
Financing Activities (Textuals)
Maximum Value of Shares to be Issued Under ATM Program													$ 1,000,000,000
Maximum Percentage Paid to Selling Agents													2.00%
Issuance of Common Stock													$ 959,300,000		827,200,000
Maximum Percentage Debt to Capitalization													67.50%
Total Commitment from Bank Conduits to Finance Receivables					900,000,000								$ 900,000,000
Forward Equity Purchase Contract Included in Current and Noncurrent Liabilities as of September 30,					(6,700,000)		$ (3,300,000)	$ 12,500,000	(3,000,000.0)		$ (18,800,000)	$ 16,700,000
Commitment from Bank Conduits to Finance Receivables					750,000,000								750,000,000
Issuance of Long-term Debt													4,017,800,000		3,428,400,000
Related Party
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					0				0				0		0
Reconciling Adjustments [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					0				0				0		0
Reconciling Adjustments [Member] | Related Party
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					(508,400,000)				(425,000,000.0)				(1,416,300,000)		(1,190,500,000)
Vertically Integrated Utilities [Member] | Related Party
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					47,300,000				51,700,000				134,300,000		145,800,000
Transmission And Distribution Utilities [Member] | Related Party
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					8,900,000				4,700,000				27,200,000		14,100,000
Generation And Marketing [Member] | Related Party
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					39,200,000				2,300,000				52,500,000		17,300,000
Other Segments [Member] | Related Party
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold	[6]				30,300,000				17,300,000				83,900,000		36,600,000
Wholesale Transmission [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					337,600,000	[7]			314,800,000	[8]			1,015,400,000	[9]	991,000,000.0	[10]
Wholesale Transmission [Member] | Reconciling Adjustments [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					(425,100,000)	[7]			(392,700,000)	[8]			(1,229,700,000)	[9]	(1,086,500,000)	[10]
Wholesale Transmission [Member] | AEP Transmission Holdco [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					466,100,000	[7]			424,900,000	[8]			1,372,000,000	[9]	1,261,000,000	[10]
Wholesale Transmission [Member] | AEP Transmission Holdco [Member] | Related Party
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					366,000,000				342,000,000				1,100,000,000		1,000,000,000
Wholesale Transmission [Member] | Vertically Integrated Utilities [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					120,600,000	[7]			120,300,000	[8]			348,800,000	[9]	334,400,000	[10]
Wholesale Transmission [Member] | Vertically Integrated Utilities [Member] | Related Party
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold													125,000,000		120,000,000
Wholesale Transmission [Member] | Transmission And Distribution Utilities [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					176,000,000.0	[7]			162,300,000	[8]			524,300,000	[9]	482,100,000	[10]
Wholesale Transmission [Member] | Generation And Marketing [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					0	[7]			0	[8]			0	[9]	0	[10]
Wholesale Transmission [Member] | Other Segments [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					0	[7]			0	[8]			0	[9]	0	[10]
Other Revenues [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					132,300,000	[11]			138,000,000.0	[12]			314,800,000	[13]	373,800,000	[14]
Other Revenues [Member] | Reconciling Adjustments [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					(48,500,000)	[11]			(31,900,000)	[12]			(132,100,000)	[13]	(71,600,000)	[14]
Other Revenues [Member] | AEP Transmission Holdco [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					4,800,000	[11]			(300,000)	[12]			12,700,000	[13]	(300,000)	[14]
Other Revenues [Member] | Corporate and Other | Related Party
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					32,000,000				18,000,000
Other Revenues [Member] | Vertically Integrated Utilities [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					61,300,000	[11]			69,700,000	[12]			155,800,000	[13]	180,500,000	[14]
Other Revenues [Member] | Transmission And Distribution Utilities [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					58,200,000	[11]			74,500,000	[12]			157,100,000	[13]	194,200,000	[14]
Other Revenues [Member] | Generation And Marketing [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					900,000	[11]			1,700,000	[12]			7,700,000	[13]	11,900,000	[14]
Other Revenues [Member] | Other Segments [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					55,600,000	[11]			24,300,000	[12]			113,600,000	[13]	59,100,000	[14]
Wholesale Generation [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					205,800,000				382,800,000				582,100,000		881,700,000	[15]
Wholesale Generation [Member] | Reconciling Adjustments [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					(300,000)				(200,000)				(200,000)		(100,000)	[15]
Wholesale Generation [Member] | AEP Transmission Holdco [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					0				0				0		0	[15]
Wholesale Generation [Member] | Vertically Integrated Utilities [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					174,300,000				299,300,000				498,500,000		674,800,000	[15]
Wholesale Generation [Member] | Transmission And Distribution Utilities [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					0				0				0		0	[15]
Wholesale Generation [Member] | Generation And Marketing [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					31,800,000				83,700,000				83,800,000		207,000,000.0	[15]
Wholesale Generation [Member] | Other Segments [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					0				0				0		0	[15]
Residential [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					2,099,200,000				2,019,900,000				5,462,500,000		5,312,200,000
Residential [Member] | Reconciling Adjustments [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					0				0				0		0
Residential [Member] | AEP Transmission Holdco [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					0				0				0		0
Residential [Member] | Vertically Integrated Utilities [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					1,326,700,000				1,298,000,000				3,459,100,000		3,428,100,000
Residential [Member] | Transmission And Distribution Utilities [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					772,500,000				721,900,000				2,003,400,000		1,884,100,000
Residential [Member] | Generation And Marketing [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					0				0				0		0
Residential [Member] | Other Segments [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					0				0				0		0
Commercial [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					1,141,000,000				1,098,100,000				3,151,300,000		2,917,200,000
Commercial [Member] | Reconciling Adjustments [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					0				0				0		0
Commercial [Member] | AEP Transmission Holdco [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					0				0				0		0
Commercial [Member] | Vertically Integrated Utilities [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					753,300,000				725,100,000				2,029,400,000		1,922,800,000
Commercial [Member] | Transmission And Distribution Utilities [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					387,700,000				373,000,000.0				1,121,900,000		994,400,000
Commercial [Member] | Generation And Marketing [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					0				0				0		0
Commercial [Member] | Other Segments [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					0				0				0		0
Industrial [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					838,500,000				849,700,000				2,572,400,000	[16]	2,349,900,000	[15]
Industrial [Member] | Reconciling Adjustments [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					(300,000)				(300,000)				(600,000)	[16]	(700,000)	[15]
Industrial [Member] | AEP Transmission Holdco [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					0				0				0	[16]	0	[15]
Industrial [Member] | Vertically Integrated Utilities [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					699,900,000				658,500,000				2,069,100,000	[16]	1,863,300,000	[15]
Industrial [Member] | Transmission And Distribution Utilities [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					138,900,000				191,500,000				503,900,000	[16]	487,300,000	[15]
Industrial [Member] | Generation And Marketing [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					0				0				0	[16]	0	[15]
Industrial [Member] | Other Segments [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					0				0				0	[16]	0	[15]
Other Retail [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					79,600,000				69,300,000				219,700,000		194,000,000.0
Other Retail [Member] | Reconciling Adjustments [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					0				0				0		0
Other Retail [Member] | AEP Transmission Holdco [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					0				0				0		0
Other Retail [Member] | Vertically Integrated Utilities [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					66,600,000				54,300,000				182,300,000		154,600,000
Other Retail [Member] | Transmission And Distribution Utilities [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					13,000,000.0				15,000,000.0				37,400,000		39,400,000
Other Retail [Member] | Generation And Marketing [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					0				0				0		0
Other Retail [Member] | Other Segments [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					0				0				0		0
Retail [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					4,158,300,000				4,037,000,000				11,405,900,000		10,773,300,000
Retail [Member] | Reconciling Adjustments [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					(300,000)				(300,000)				(600,000)		(700,000)
Retail [Member] | AEP Transmission Holdco [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					0				0				0		0
Retail [Member] | Vertically Integrated Utilities [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					2,846,500,000				2,735,900,000				7,739,900,000		7,368,800,000
Retail [Member] | Transmission And Distribution Utilities [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					1,312,100,000				1,301,400,000				3,666,600,000		3,405,200,000
Retail [Member] | Generation And Marketing [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					0				0				0		0
Retail [Member] | Other Segments [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					0				0				0		0
Renewable Generation [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					17,300,000	[17]			41,800,000	[18]			68,500,000	[16]	98,700,000	[15]
Renewable Generation [Member] | Reconciling Adjustments [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					(2,500,000)	[17]			(2,500,000)	[18]			(5,700,000)	[16]	(6,200,000)	[15]
Renewable Generation [Member] | AEP Transmission Holdco [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					0	[17]			0	[18]			0	[16]	0	[15]
Renewable Generation [Member] | Vertically Integrated Utilities [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					0	[17]			0	[18]			0	[16]	0	[15]
Renewable Generation [Member] | Transmission And Distribution Utilities [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					0	[17]			0	[18]			0	[16]	0	[15]
Renewable Generation [Member] | Generation And Marketing [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					19,800,000	[17]			44,300,000	[18]			74,200,000	[16]	104,900,000	[15]
Renewable Generation [Member] | Other Segments [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					0	[17]			0	[18]			0	[16]	0	[15]
Retail, Trading and Marketing Revenues [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					474,900,000	[19]			485,300,000				1,287,200,000	[20]	1,275,600,000	[21]
Retail, Trading and Marketing Revenues [Member] | Reconciling Adjustments [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					(36,700,000)	[19]			200,000				(46,700,000)	[20]	(11,100,000)	[21]
Retail, Trading and Marketing Revenues [Member] | AEP Transmission Holdco [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					0	[19]			0				0	[20]	0	[21]
Retail, Trading and Marketing Revenues [Member] | Vertically Integrated Utilities [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					0	[19]			0				0	[20]	0	[21]
Retail, Trading and Marketing Revenues [Member] | Transmission And Distribution Utilities [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					0	[19]			0				0	[20]	0	[21]
Retail, Trading and Marketing Revenues [Member] | Generation And Marketing [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					510,800,000	[19]			482,900,000				1,332,200,000	[20]	1,280,000,000	[21]
Retail, Trading and Marketing Revenues [Member] | Generation And Marketing [Member] | Related Party
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					37,000,000								47,000,000		11,000,000
Retail, Trading and Marketing Revenues [Member] | Other Segments [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					800,000	[19]			2,200,000				1,700,000	[20]	6,700,000	[21]
Wholesale and Competitive [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					1,035,600,000				1,224,700,000				2,953,200,000		3,247,000,000
Wholesale and Competitive [Member] | Reconciling Adjustments [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					(464,600,000)				(395,200,000)				(1,282,300,000)		(1,103,900,000)
Wholesale and Competitive [Member] | AEP Transmission Holdco [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					466,100,000				424,900,000				1,372,000,000		1,261,000,000
Wholesale and Competitive [Member] | Vertically Integrated Utilities [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					294,900,000				419,600,000				847,300,000		1,009,200,000
Wholesale and Competitive [Member] | Transmission And Distribution Utilities [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					176,000,000.0				162,300,000				524,300,000		482,100,000
Wholesale and Competitive [Member] | Generation And Marketing [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					562,400,000				610,900,000				1,490,200,000		1,591,900,000
Wholesale and Competitive [Member] | Other Segments [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					800,000				2,200,000				1,700,000		6,700,000
Affiliated and Nonaffiliated [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					5,326,200,000				5,399,700,000				14,673,900,000		14,394,100,000
Affiliated and Nonaffiliated [Member] | Reconciling Adjustments [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					(513,400,000)				(427,400,000)				(1,415,000,000)		(1,176,200,000)
Affiliated and Nonaffiliated [Member] | AEP Transmission Holdco [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					470,900,000				424,600,000				1,384,700,000		1,260,700,000
Affiliated and Nonaffiliated [Member] | Vertically Integrated Utilities [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					3,202,700,000				3,225,200,000				8,743,000,000		8,558,500,000
Affiliated and Nonaffiliated [Member] | Transmission And Distribution Utilities [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					1,546,300,000				1,538,200,000				4,348,000,000		4,081,500,000
Affiliated and Nonaffiliated [Member] | Generation And Marketing [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					563,300,000				612,600,000				1,497,900,000		1,603,800,000
Affiliated and Nonaffiliated [Member] | Other Segments [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					56,400,000				26,500,000				115,300,000		65,800,000
Other Revenues [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					120,900,000				92,900,000				307,800,000		280,500,000
Other Revenues [Member] | Corporate and Other | Related Party
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold													87,000,000		36,000,000
Other Revenues [Member] | Other Segments [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold	[6]				26,900,000				11,000,000.0				$ 35,400,000		36,100,000
2020 Equity Units [Member]
Financing Activities (Textuals)
Stock Issued During Period, Shares, New Issues													10,048,668
Issuance of Common Stock													$ 850,000,000
Equity Units Issued													17,000,000
Per Unit Conversion for Equity Units					$ 50								$ 50
Net Equity Units Issuance Proceeds													833,000,000
Principal Amounts of Junior Subordinated Debt													$ 1,000
Forward Equity Purchase Contract Date													2023
Corporate unit ownership share of an equity unit					5.00%								5.00%
Junior Subordinated Debt [Member]
Long-term Debt and Other Securities Issued, Retired and Principal Payments Made
Interest Rate (Percentage)					5.699%								5.699%
Junior Subordinated Debt [Member] | 2020 Equity Units [Member]
Long-term Debt and Other Securities Issued, Retired and Principal Payments Made
Proceeds from Issuance of Debt													$ 850,000,000
Interest Rate (Percentage)					1.30%								1.30%
Senior Unsecured Notes [Member]
Long-term Debt and Other Securities Issued, Retired and Principal Payments Made
Proceeds from Issuance of Debt	[3]												$ 850,000,000.0
Due Date													2033
Interest Rate (Percentage)					5.63%								5.63%
Senior Unsecured Notes Eight
Long-term Debt and Other Securities Issued, Retired and Principal Payments Made
Repayments of Long-term Debt													$ 600,000,000.0
Due Date													2023
Interest Rate (Variable)													Variable
Senior Unsecured Notes Twelve | Subsequent Event [Member]
Long-term Debt and Other Securities Issued, Retired and Principal Payments Made
Repayments of Long-term Debt		$ 450,000,000
Commercial Paper [Member]
Short-term Debt:
Weighted Average Interest Rate	[5]				5.64%								5.64%				4.80%
Term Loan [Member]
Short-term Debt:
Weighted Average Interest Rate	[5]				0.00%								0.00%				5.17%
Term Loan					$ 0								$ 0				$ 125,000,000.0
Term Loan 2 [Member]
Short-term Debt:
Weighted Average Interest Rate	[5]				0.00%								0.00%				5.17%
Term Loan					$ 0								$ 0				$ 150,000,000.0
Term Loan 4
Short-term Debt:
Weighted Average Interest Rate	[5]				0.00%								0.00%				5.23%
Term Loan					$ 0								$ 0				$ 100,000,000.0
Term Loan 5
Short-term Debt:
Weighted Average Interest Rate	[5]				0.00%								0.00%				4.87%
Term Loan					$ 0								$ 0				$ 125,000,000.0
AEP Texas Inc. [Member]
Long-term Debt
Total Long-term Debt Outstanding					5,926,700,000								5,926,700,000				5,657,800,000
Long-term Debt Due Within One Year					94,900,000								94,900,000				278,500,000
Long-term Debt					5,831,800,000								5,831,800,000				5,379,300,000
Long-term Debt and Other Securities Issued, Retired and Principal Payments Made
Repayments of Long-term Debt													$ 240,000,000.0		678,600,000
Financing Activities (Textuals)
Maximum Percentage Debt to Capitalization													67.50%
Issuance of Long-term Debt													$ 505,400,000		1,188,700,000
AEP Texas Inc. [Member] | Related Party
Short-term Debt:
Net Borrowings from Money Pool					0								0				96,500,000
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					1,200,000				900,000				3,700,000		2,600,000
Financing Activities (Textuals)
Net Loans To Money Pool					49,000,000.0								49,000,000.0				6,900,000
AEP Texas Inc. [Member] | Wholesale Transmission [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					154,600,000	[22]			140,800,000	[23]			464,000,000.0	[24]	417,700,000	[25]
AEP Texas Inc. [Member] | Other Revenues [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					8,800,000	[26]			9,500,000	[27]			29,200,000	[28]	24,400,000	[29]
AEP Texas Inc. [Member] | Wholesale Generation [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					0	[30]			0	[31]			0	[32]	0	[33]
AEP Texas Inc. [Member] | Residential [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					236,200,000				204,000,000.0				511,800,000		520,800,000
AEP Texas Inc. [Member] | Commercial [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					112,400,000				107,100,000				310,300,000		312,600,000
AEP Texas Inc. [Member] | Industrial [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					35,400,000				35,400,000				109,900,000	[34]	102,600,000	[35]
AEP Texas Inc. [Member] | Other Retail [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					9,200,000				11,500,000				26,200,000		29,200,000
AEP Texas Inc. [Member] | Retail [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					393,200,000				358,000,000.0				958,200,000		965,200,000
AEP Texas Inc. [Member] | Wholesale and Competitive [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					154,600,000				140,800,000				464,000,000.0		417,700,000
AEP Texas Inc. [Member] | Affiliated and Nonaffiliated [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					556,600,000				508,300,000				1,451,400,000		1,407,300,000
AEP Texas Inc. [Member] | Other Revenues [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					1,800,000				300,000				$ 2,900,000		$ 2,500,000
AEP Texas Inc. [Member] | Utility [Member]
Maximum Interest Rate													5.81%		3.39%
Minimum Interest Rate													4.66%		0.10%
Money Pool Participants Money Pool Activity And Authorized Borrowing Limits
Maximum Borrowings from Money Pool													$ 477,500,000
Maximum Loans to Money Pool													42,000,000.0
Average Borrowings from Money Pool													250,400,000
Average Loans to Money Pool													42,000,000.0
Authorized Short Term Borrowing Limit													$ 500,000,000.0
Average Interest Rates for Funds Borrowed From and Loaned to Money Pool
Average Interest Rate For Funds Borrowed													5.44%		0.90%
Average Interest Rate For Funds Loaned													5.70%		1.82%
AEP Texas Inc. [Member] | Utility [Member] | Related Party
Financing Activities (Textuals)
Net Loans To Money Pool					42,000,000.0								$ 42,000,000.0
AEP Texas Inc. [Member] | Nonutility [Member]
Money Pool Participants Money Pool Activity And Authorized Borrowing Limits
Maximum Loans to Money Pool													7,000,000.0
Average Loans to Money Pool													$ 6,900,000
Maximum and Minimum Interest Rates
Maximum Interest Rate For Funds Loaned													5.81%		3.39%
Minimum Interest Rate for Funds Loaned													4.66%		0.46%
Average Interest Rates for Funds Borrowed From and Loaned to Money Pool
Average Interest Rate For Funds Loaned													5.47%		1.51%
AEP Texas Inc. [Member] | Nonutility [Member] | Related Party
Financing Activities (Textuals)
Net Loans To Money Pool					$ 7,000,000.0								$ 7,000,000.0
AEP Texas Inc. [Member] | Pollution Control Bond [Member]
Long-term Debt and Other Securities Issued, Retired and Principal Payments Made
Proceeds from Issuance of Debt	[3]												$ 60,000,000.0
Due Date													2030
Interest Rate (Percentage)					4.25%								4.25%
AEP Texas Inc. [Member] | Securitization Bonds [Member]
Long-term Debt and Other Securities Issued, Retired and Principal Payments Made
Repayments of Long-term Debt													$ 31,500,000
Due Date													2024
Interest Rate (Percentage)					2.85%								2.85%
AEP Texas Inc. [Member] | Securitization Bonds Two [Member]
Long-term Debt and Other Securities Issued, Retired and Principal Payments Made
Repayments of Long-term Debt													$ 23,500,000
Due Date													2025
Interest Rate (Percentage)					2.06%								2.06%
AEP Texas Inc. [Member] | Senior Unsecured Notes Three
Long-term Debt and Other Securities Issued, Retired and Principal Payments Made
Proceeds from Issuance of Debt	[3]												$ 450,000,000.0
Due Date													2033
Interest Rate (Percentage)					5.40%								5.40%
AEP Texas Inc. [Member] | Pollution Control Bond Three
Long-term Debt and Other Securities Issued, Retired and Principal Payments Made
Repayments of Long-term Debt													$ 60,000,000.0
Due Date													2023
Interest Rate (Percentage)					0.90%								0.90%
AEP Texas Inc. [Member] | Senior Unsecured Notes Nine
Long-term Debt and Other Securities Issued, Retired and Principal Payments Made
Repayments of Long-term Debt													$ 125,000,000.0
Due Date													2023
Interest Rate (Percentage)					3.09%								3.09%
AEP Transmission Co [Member]
Long-term Debt
Total Long-term Debt Outstanding					$ 5,473,700,000								$ 5,473,700,000				4,782,800,000
Long-term Debt Due Within One Year					60,000,000.0								60,000,000.0				60,000,000.0
Long-term Debt					5,413,700,000								5,413,700,000				4,722,800,000
Financing Activities (Textuals)
Sub-Limit of Secured Debt					$ 50,000,000								$ 50,000,000
Maximum Percentage of Consolidated Tangible Net Assets					10.00%								10.00%
Tangible Capital to Tangible Assets					0.90%								0.90%
Maximum Percentage Debt to Capitalization													67.50%
Issuance of Long-term Debt													$ 689,000,000.0		$ 540,900,000
AEP Transmission Co [Member] | Related Party
Short-term Debt:
Net Borrowings from Money Pool					$ 116,800,000								116,800,000				229,300,000
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					374,700,000				340,600,000				1,097,900,000		999,500,000
Financing Activities (Textuals)
Net Loans To Money Pool					90,600,000								90,600,000				4,400,000
AEP Transmission Co [Member] | Reconciling Adjustments [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					0				0				0		0
AEP Transmission Co [Member] | Reconciling Adjustments [Member] | Related Party
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					0				0				0		0
AEP Transmission Co [Member] | Wholesale Transmission [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					454,700,000	[22]			411,700,000	[23]			1,338,100,000	[24]	1,218,100,000	[25]
AEP Transmission Co [Member] | Wholesale Transmission [Member] | Related Party
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					363,000,000				339,000,000				1,100,000,000		992,000,000
AEP Transmission Co [Member] | Other Revenues [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					5,000,000.0	[26]			(300,000)	[27]			12,800,000	[28]	(400,000)	[29]
AEP Transmission Co [Member] | Wholesale Generation [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					0	[30]			0	[31]			0	[32]	0	[33]
AEP Transmission Co [Member] | Residential [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					0				0				0		0
AEP Transmission Co [Member] | Commercial [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					0				0				0		0
AEP Transmission Co [Member] | Industrial [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					0				0				0	[34]	0	[35]
AEP Transmission Co [Member] | Other Retail [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					0				0				0		0
AEP Transmission Co [Member] | Retail [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					0				0				0		0
AEP Transmission Co [Member] | Wholesale and Competitive [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					454,700,000				411,700,000				1,338,100,000		1,218,100,000
AEP Transmission Co [Member] | Affiliated and Nonaffiliated [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					459,700,000				411,400,000				$ 1,350,900,000		$ 1,217,700,000
AEP Transmission Co [Member] | Utility [Member]
Maximum Interest Rate													5.81%		3.39%
Minimum Interest Rate													4.66%		0.10%
Money Pool Participants Money Pool Activity And Authorized Borrowing Limits
Maximum Borrowings from Money Pool													$ 471,300,000
Maximum Loans to Money Pool													309,400,000
Average Borrowings from Money Pool													134,300,000
Average Loans to Money Pool													76,000,000.0
Authorized Short Term Borrowing Limit	[36]												$ 820,000,000.0
Average Interest Rates for Funds Borrowed From and Loaned to Money Pool
Average Interest Rate For Funds Borrowed													5.29%		1.03%
Average Interest Rate For Funds Loaned													5.52%		2.14%
AEP Transmission Co [Member] | Utility [Member] | Related Party
Financing Activities (Textuals)
Net Loans To Money Pool					7,200,000								$ 7,200,000
AEP Transmission Co [Member] | Direct Borrowing [Member]
Money Pool Participants Money Pool Activity And Authorized Borrowing Limits
Maximum Borrowings from Money Pool													37,900,000
Maximum Loans to Money Pool													158,100,000
Average Borrowings from Money Pool													3,000,000.0
Average Loans to Money Pool													67,500,000
Borrowings from Parent					33,400,000								33,400,000
Loans to Parent					$ 0								0
Authorized Short Term Borrowing Limit	[37]												$ 50,000,000.0
Maximum and Minimum Interest Rates
Maximum Interest Rate for Funds Borrowed													5.81%		3.39%
Minimum Interest Rate For Funds Borrowed													4.53%		0.46%
Maximum Interest Rate For Funds Loaned													5.81%		3.37%
Minimum Interest Rate for Funds Loaned													4.53%		0.46%
Average Interest Rates for Funds Borrowed From and Loaned to Money Pool
Average Interest Rate For Funds Borrowed													5.43%		1.56%
Average Interest Rate For Funds Loaned													5.46%		1.38%
AEP Transmission Co [Member] | Senior Unsecured Notes Two [Member]
Long-term Debt and Other Securities Issued, Retired and Principal Payments Made
Proceeds from Issuance of Debt	[3]												$ 700,000,000.0
Due Date													2053
Interest Rate (Percentage)					5.40%								5.40%
Appalachian Power Co [Member]
Long-term Debt
Total Long-term Debt Outstanding					$ 5,587,300,000								$ 5,587,300,000				5,410,500,000
Long-term Debt Due Within One Year					538,800,000								538,800,000				251,800,000
Long-term Debt					5,048,500,000								5,048,500,000				5,158,700,000
Long-term Debt and Other Securities Issued, Retired and Principal Payments Made
Repayments of Long-term Debt													26,500,000		$ 130,400,000
Accounts Receivable and Accrued Unbilled Revenues
Accounts Receivable and Accrued Unbilled Revenues					170,500,000								170,500,000				194,400,000
Proceeds from Sale of Receivables
Proceeds from Sale of Receivables to AEP Credit					451,600,000				360,400,000				$ 1,372,700,000		1,114,900,000
Financing Activities (Textuals)
Maximum Percentage Debt to Capitalization													67.50%
Issuance of Long-term Debt													$ 200,000,000.0		698,200,000
Appalachian Power Co [Member] | Related Party
Short-term Debt:
Net Borrowings from Money Pool					202,500,000								202,500,000				182,200,000
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					62,500,000				67,600,000				193,200,000		187,600,000
Financing Activities (Textuals)
Net Loans To Money Pool					19,300,000								19,300,000				19,800,000
Appalachian Power Co [Member] | Wholesale Transmission [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					45,500,000	[22]			41,500,000	[23]			130,800,000	[24]	123,400,000	[25]
Appalachian Power Co [Member] | Wholesale Transmission [Member] | Related Party
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					22,000,000								64,000,000
Appalachian Power Co [Member] | Other Revenues [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					35,200,000	[26]			33,700,000	[27]			60,000,000.0	[28]	78,600,000	[29]
Appalachian Power Co [Member] | Wholesale Generation [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					79,400,000	[30]			107,900,000	[31]			223,800,000	[32]	227,600,000	[33]
Appalachian Power Co [Member] | Wholesale Generation [Member] | Related Party
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					36,000,000				44,000,000				121,000,000		122,000,000
Appalachian Power Co [Member] | Residential [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					397,100,000				360,500,000				1,192,400,000		1,131,700,000
Appalachian Power Co [Member] | Commercial [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					181,300,000				161,100,000				516,200,000		467,600,000
Appalachian Power Co [Member] | Industrial [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					197,100,000				163,300,000				575,400,000	[34]	479,000,000.0	[35]
Appalachian Power Co [Member] | Other Retail [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					26,800,000				20,600,000				78,200,000		61,400,000
Appalachian Power Co [Member] | Retail [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					802,300,000				705,500,000				2,362,200,000		2,139,700,000
Appalachian Power Co [Member] | Wholesale and Competitive [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					124,900,000				149,400,000				354,600,000		351,000,000.0
Appalachian Power Co [Member] | Affiliated and Nonaffiliated [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					962,400,000				888,600,000				2,776,800,000		2,569,300,000
Appalachian Power Co [Member] | Other Revenues [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					3,300,000				2,900,000				9,800,000		11,800,000
Appalachian Power Co [Member] | Servicing Contracts [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					4,100,000				2,800,000				$ 13,300,000		$ 5,600,000
Appalachian Power Co [Member] | Utility [Member]
Maximum Interest Rate													5.81%		3.39%
Minimum Interest Rate													4.66%		0.10%
Money Pool Participants Money Pool Activity And Authorized Borrowing Limits
Maximum Borrowings from Money Pool													$ 388,600,000
Maximum Loans to Money Pool													19,800,000
Average Borrowings from Money Pool													280,800,000
Average Loans to Money Pool													19,000,000.0
Authorized Short Term Borrowing Limit													$ 500,000,000.0
Average Interest Rates for Funds Borrowed From and Loaned to Money Pool
Average Interest Rate For Funds Borrowed													5.47%		1.39%
Average Interest Rate For Funds Loaned													5.47%		2.13%
Appalachian Power Co [Member] | Utility [Member] | Related Party
Short-term Debt:
Net Borrowings from Money Pool					$ (183,200,000)								$ (183,200,000)
Appalachian Power Co [Member] | Other Long Term Debt [Member]
Long-term Debt and Other Securities Issued, Retired and Principal Payments Made
Proceeds from Issuance of Debt	[3]												$ 200,000,000.0
Due Date													2024
Interest Rate (Variable)													Variable
Appalachian Power Co [Member] | Securitization Bonds Three
Long-term Debt and Other Securities Issued, Retired and Principal Payments Made
Repayments of Long-term Debt													$ 9,700,000
Due Date													2023
Interest Rate (Percentage)					2.01%								2.01%
Appalachian Power Co [Member] | Securitization Bonds Four
Long-term Debt and Other Securities Issued, Retired and Principal Payments Made
Repayments of Long-term Debt													$ 16,800,000
Due Date													2028
Interest Rate (Percentage)					3.77%								3.77%
Indiana Michigan Power Co [Member]
Long-term Debt
Total Long-term Debt Outstanding					$ 3,443,600,000								$ 3,443,600,000				3,260,800,000
Long-term Debt Due Within One Year					61,800,000								61,800,000				341,800,000
Long-term Debt					3,381,800,000								3,381,800,000				2,919,000,000
Long-term Debt and Other Securities Issued, Retired and Principal Payments Made
Repayments of Long-term Debt													324,100,000		$ 64,500,000
Accounts Receivable and Accrued Unbilled Revenues
Accounts Receivable and Accrued Unbilled Revenues					176,200,000								176,200,000				166,900,000
Proceeds from Sale of Receivables
Proceeds from Sale of Receivables to AEP Credit					553,300,000				558,500,000				1,575,900,000		1,574,300,000
Financing Activities (Textuals)
Trust Fund Assets One Time Fee Obligation for Nuclear Fuel Disposition					345,000,000								$ 345,000,000				330,000,000
Maximum Percentage Debt to Capitalization													67.50%
Issuance of Long-term Debt													$ 494,800,000		72,800,000
Indiana Michigan Power Co [Member] | Related Party
Short-term Debt:
Net Borrowings from Money Pool					0								0				249,900,000
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					600,000				2,000,000.0				3,700,000		11,100,000
Financing Activities (Textuals)
Net Loans To Money Pool					21,200,000								21,200,000				23,000,000.0
Indiana Michigan Power Co [Member] | Wholesale Transmission [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					10,400,000	[22]			8,800,000	[23]			28,100,000	[24]	26,300,000	[25]
Indiana Michigan Power Co [Member] | Other Revenues [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					26,200,000	[26]			30,600,000	[27]			92,600,000	[28]	86,300,000	[29]
Indiana Michigan Power Co [Member] | Other Revenues [Member] | Related Party
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					18,000,000				15,000,000				52,000,000		44,000,000
Indiana Michigan Power Co [Member] | Wholesale Generation [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					90,200,000	[30]			126,300,000	[31]			257,700,000	[32]	310,900,000	[33]
Indiana Michigan Power Co [Member] | Residential [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					230,700,000				238,600,000				655,500,000		665,600,000
Indiana Michigan Power Co [Member] | Commercial [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					159,200,000				154,300,000				439,500,000		419,500,000
Indiana Michigan Power Co [Member] | Industrial [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					159,100,000				155,600,000				467,600,000	[34]	452,100,000	[35]
Indiana Michigan Power Co [Member] | Other Retail [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					1,300,000				1,200,000				3,800,000		3,700,000
Indiana Michigan Power Co [Member] | Retail [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					550,300,000				549,700,000				1,566,400,000		1,540,900,000
Indiana Michigan Power Co [Member] | Wholesale and Competitive [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					100,600,000				135,100,000				285,800,000		337,200,000
Indiana Michigan Power Co [Member] | Affiliated and Nonaffiliated [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					677,100,000				715,400,000				1,944,800,000		1,964,400,000
Indiana Michigan Power Co [Member] | Other Revenues [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					4,200,000				4,400,000				9,700,000		10,000,000.0
Indiana Michigan Power Co [Member] | Other Revenues [Member] | Related Party
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					15,400,000				13,300,000				45,800,000		38,400,000
Indiana Michigan Power Co [Member] | Servicing Contracts [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					4,400,000				2,800,000				$ 12,200,000		$ 6,500,000
Indiana Michigan Power Co [Member] | Utility [Member]
Maximum Interest Rate													5.81%		3.39%
Minimum Interest Rate													4.66%		0.10%
Money Pool Participants Money Pool Activity And Authorized Borrowing Limits
Maximum Borrowings from Money Pool													$ 475,300,000
Maximum Loans to Money Pool													112,200,000
Average Borrowings from Money Pool													126,000,000.0
Average Loans to Money Pool													49,300,000
Authorized Short Term Borrowing Limit													$ 500,000,000.0
Average Interest Rates for Funds Borrowed From and Loaned to Money Pool
Average Interest Rate For Funds Borrowed													5.13%		1.38%
Average Interest Rate For Funds Loaned													5.54%		1.46%
Indiana Michigan Power Co [Member] | Utility [Member] | Related Party
Financing Activities (Textuals)
Net Loans To Money Pool					$ 21,200,000								$ 21,200,000
Indiana Michigan Power Co [Member] | Notes Payable, Other Payable Four [Member]
Long-term Debt and Other Securities Issued, Retired and Principal Payments Made
Repayments of Long-term Debt													$ 12,000,000.0
Due Date													2025
Interest Rate (Percentage)					0.93%								0.93%
Indiana Michigan Power Co [Member] | Notes Payable, Other Payable Five [Member]
Long-term Debt and Other Securities Issued, Retired and Principal Payments Made
Repayments of Long-term Debt													$ 20,600,000
Due Date													2026
Interest Rate (Percentage)					3.44%								3.44%
Indiana Michigan Power Co [Member] | Notes Payable, Other Payable Six [Member]
Long-term Debt and Other Securities Issued, Retired and Principal Payments Made
Repayments of Long-term Debt													$ 20,500,000
Due Date													2027
Interest Rate (Percentage)					5.93%								5.93%
Indiana Michigan Power Co [Member] | Notes Payable, Other Payable Seven [Member] | Subsequent Event [Member]
Long-term Debt and Other Securities Issued, Retired and Principal Payments Made
Repayments of Long-term Debt				$ 4,000,000
Indiana Michigan Power Co [Member] | OtherLongTermDebtThree
Long-term Debt and Other Securities Issued, Retired and Principal Payments Made
Repayments of Long-term Debt													$ 1,700,000
Due Date													2025
Interest Rate (Percentage)					6.00%								6.00%
Indiana Michigan Power Co [Member] | Notes Payable, Other Payable
Long-term Debt and Other Securities Issued, Retired and Principal Payments Made
Repayments of Long-term Debt													$ 1,800,000
Due Date													2023
Interest Rate (Variable)													Variable
Indiana Michigan Power Co [Member] | Notes Payable, Other Payable Two [Member]
Long-term Debt and Other Securities Issued, Retired and Principal Payments Made
Repayments of Long-term Debt													$ 3,700,000
Due Date													2024
Interest Rate (Variable)													Variable
Indiana Michigan Power Co [Member] | Senior Unsecured Notes Four
Long-term Debt and Other Securities Issued, Retired and Principal Payments Made
Proceeds from Issuance of Debt	[3]												$ 500,000,000.0
Due Date													2053
Interest Rate (Percentage)					5.63%								5.63%
Indiana Michigan Power Co [Member] | Notes Payable, Other Payable Three [Member]
Long-term Debt and Other Securities Issued, Retired and Principal Payments Made
Repayments of Long-term Debt													$ 13,800,000
Due Date													2025
Interest Rate (Variable)													Variable
Indiana Michigan Power Co [Member] | Senior Unsecured Notes Ten
Long-term Debt and Other Securities Issued, Retired and Principal Payments Made
Repayments of Long-term Debt													$ 250,000,000.0
Due Date													2023
Interest Rate (Percentage)					3.20%								3.20%
Ohio Power Co [Member]
Long-term Debt
Total Long-term Debt Outstanding					$ 3,366,200,000								$ 3,366,200,000				2,970,300,000
Long-term Debt Due Within One Year					0								0				100,000
Long-term Debt					3,366,200,000								3,366,200,000				2,970,200,000
Long-term Debt and Other Securities Issued, Retired and Principal Payments Made
Repayments of Long-term Debt													600,000		$ 100,000
Accounts Receivable and Accrued Unbilled Revenues
Accounts Receivable and Accrued Unbilled Revenues					479,300,000								479,300,000				478,600,000
Proceeds from Sale of Receivables
Proceeds from Sale of Receivables to AEP Credit					850,300,000				874,100,000				2,518,600,000		2,284,000,000
Financing Activities (Textuals)
Issuance of Long-term Debt													395,000,000.0		0
Ohio Power Co [Member] | Related Party
Short-term Debt:
Net Borrowings from Money Pool					113,300,000								113,300,000				172,900,000
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					7,800,000				4,000,000.0				23,600,000		11,600,000
Ohio Power Co [Member] | Wholesale Transmission [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					21,400,000	[22]			21,500,000	[23]			60,300,000	[24]	64,400,000	[25]
Ohio Power Co [Member] | Other Revenues [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					49,200,000	[26]			64,800,000	[27]			127,900,000	[28]	169,600,000	[29]
Ohio Power Co [Member] | Wholesale Generation [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					0	[30]			0	[31]			0	[32]	0	[33]
Ohio Power Co [Member] | Residential [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					536,300,000				517,900,000				1,491,600,000		1,363,300,000
Ohio Power Co [Member] | Commercial [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					275,300,000				266,100,000				811,600,000		681,900,000
Ohio Power Co [Member] | Industrial [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					103,600,000				156,100,000				394,000,000.0	[34]	384,800,000	[35]
Ohio Power Co [Member] | Other Retail [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					3,800,000				3,500,000				11,200,000		10,200,000
Ohio Power Co [Member] | Retail [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					919,000,000.0				943,600,000				2,708,400,000		2,440,200,000
Ohio Power Co [Member] | Wholesale and Competitive [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					21,400,000				21,500,000				60,300,000		64,400,000
Ohio Power Co [Member] | Affiliated and Nonaffiliated [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					989,600,000				1,029,900,000				2,896,600,000		2,674,200,000
Ohio Power Co [Member] | Other Revenues [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					3,000,000.0				2,100,000				10,300,000		6,000,000.0
Ohio Power Co [Member] | Servicing Contracts [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					7,400,000				7,300,000				$ 22,300,000		$ 22,200,000
Ohio Power Co [Member] | Utility [Member]
Maximum Interest Rate													5.81%		3.39%
Minimum Interest Rate													4.66%		0.10%
Money Pool Participants Money Pool Activity And Authorized Borrowing Limits
Maximum Borrowings from Money Pool													$ 485,700,000
Maximum Loans to Money Pool													64,700,000
Average Borrowings from Money Pool													207,100,000
Average Loans to Money Pool													40,200,000
Authorized Short Term Borrowing Limit													$ 500,000,000.0
Average Interest Rates for Funds Borrowed From and Loaned to Money Pool
Average Interest Rate For Funds Borrowed													5.37%		1.81%
Average Interest Rate For Funds Loaned													5.60%		1.22%
Ohio Power Co [Member] | Utility [Member] | Related Party
Short-term Debt:
Net Borrowings from Money Pool					$ (113,300,000)								$ (113,300,000)
Ohio Power Co [Member] | OtherLongTermDebtFour
Long-term Debt and Other Securities Issued, Retired and Principal Payments Made
Repayments of Long-term Debt													$ 600,000
Due Date													2028
Interest Rate (Percentage)					1.15%								1.15%
Ohio Power Co [Member] | Senior Unsecured Notes Five
Long-term Debt and Other Securities Issued, Retired and Principal Payments Made
Proceeds from Issuance of Debt	[3]												$ 400,000,000.0
Due Date													2033
Interest Rate (Percentage)					5.00%								5.00%
Public Service Co Of Oklahoma [Member]
Long-term Debt
Total Long-term Debt Outstanding					$ 2,384,200,000								$ 2,384,200,000				1,912,800,000
Long-term Debt Due Within One Year					600,000								600,000				500,000
Long-term Debt					2,383,600,000								2,383,600,000				1,912,300,000
Long-term Debt and Other Securities Issued, Retired and Principal Payments Made
Repayments of Long-term Debt													400,000		$ 500,400,000
Accounts Receivable and Accrued Unbilled Revenues
Accounts Receivable and Accrued Unbilled Revenues					211,500,000								211,500,000				155,500,000
Proceeds from Sale of Receivables
Proceeds from Sale of Receivables to AEP Credit					633,800,000				588,500,000				$ 1,510,300,000		1,380,400,000
Financing Activities (Textuals)
Maximum Percentage Debt to Capitalization													67.50%
Issuance of Long-term Debt													$ 469,800,000		499,700,000
Public Service Co Of Oklahoma [Member] | Related Party
Short-term Debt:
Net Borrowings from Money Pool					0								0				364,200,000
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					200,000				700,000				1,000,000.0		2,100,000
Financing Activities (Textuals)
Net Loans To Money Pool					9,200,000								9,200,000				0
Public Service Co Of Oklahoma [Member] | Wholesale Transmission [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					10,800,000	[22]			10,200,000	[23]			32,000,000.0	[24]	28,900,000	[25]
Public Service Co Of Oklahoma [Member] | Other Revenues [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					5,400,000	[26]			6,400,000	[27]			14,900,000	[28]	21,400,000	[29]
Public Service Co Of Oklahoma [Member] | Wholesale Generation [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					(4,900,000)	[30]			9,400,000	[31]			300,000	[32]	19,200,000	[33]
Public Service Co Of Oklahoma [Member] | Residential [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					310,500,000				299,600,000				667,900,000		650,700,000
Public Service Co Of Oklahoma [Member] | Commercial [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					171,900,000				153,400,000				412,700,000		372,100,000
Public Service Co Of Oklahoma [Member] | Industrial [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					114,100,000				98,900,000				320,200,000	[34]	270,000,000.0	[35]
Public Service Co Of Oklahoma [Member] | Other Retail [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					33,800,000				30,100,000				86,300,000		77,100,000
Public Service Co Of Oklahoma [Member] | Retail [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					630,300,000				582,000,000.0				1,487,100,000		1,369,900,000
Public Service Co Of Oklahoma [Member] | Wholesale and Competitive [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					5,900,000				19,600,000				32,300,000		48,100,000
Public Service Co Of Oklahoma [Member] | Affiliated and Nonaffiliated [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					641,600,000				608,000,000.0				1,534,300,000		1,439,400,000
Public Service Co Of Oklahoma [Member] | Other Revenues [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					1,400,000				1,000,000.0				5,100,000		3,700,000
Public Service Co Of Oklahoma [Member] | Servicing Contracts [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					4,600,000				2,400,000				$ 11,300,000		$ 4,600,000
Public Service Co Of Oklahoma [Member] | Utility [Member]
Maximum Interest Rate													5.81%		3.39%
Minimum Interest Rate													4.66%		0.10%
Money Pool Participants Money Pool Activity And Authorized Borrowing Limits
Maximum Borrowings from Money Pool													$ 375,000,000.0
Maximum Loans to Money Pool													121,500,000
Average Borrowings from Money Pool													106,300,000
Average Loans to Money Pool													53,900,000
Authorized Short Term Borrowing Limit													$ 400,000,000.0
Average Interest Rates for Funds Borrowed From and Loaned to Money Pool
Average Interest Rate For Funds Borrowed													5.48%		1.70%
Average Interest Rate For Funds Loaned													5.24%		0.75%
Public Service Co Of Oklahoma [Member] | Utility [Member] | Related Party
Financing Activities (Textuals)
Net Loans To Money Pool					$ 9,200,000								$ 9,200,000
Public Service Co Of Oklahoma [Member] | Other Long Term Debt Five
Long-term Debt and Other Securities Issued, Retired and Principal Payments Made
Repayments of Long-term Debt													$ 400,000
Due Date													2027
Interest Rate (Percentage)					3.00%								3.00%
Public Service Co Of Oklahoma [Member] | Senior Unsecured Notes Six
Long-term Debt and Other Securities Issued, Retired and Principal Payments Made
Proceeds from Issuance of Debt	[3]												$ 475,000,000.0
Due Date													2033
Interest Rate (Percentage)					5.25%								5.25%
Southwestern Electric Power Co [Member]
Long-term Debt
Total Long-term Debt Outstanding					$ 3,646,200,000								$ 3,646,200,000				3,391,600,000
Long-term Debt Due Within One Year					0								0				6,200,000
Long-term Debt					3,646,200,000								3,646,200,000				3,385,400,000
Long-term Debt and Other Securities Issued, Retired and Principal Payments Made
Repayments of Long-term Debt													94,100,000		$ 4,700,000
Short-term Debt:
Notes Payable					3,900,000								3,900,000				0
Accounts Receivable and Accrued Unbilled Revenues
Accounts Receivable and Accrued Unbilled Revenues					210,200,000								210,200,000				194,000,000.0
Proceeds from Sale of Receivables
Proceeds from Sale of Receivables to AEP Credit					558,400,000				593,600,000				$ 1,456,500,000		1,425,300,000
Financing Activities (Textuals)
Maximum Percentage Debt to Capitalization													67.50%
Issuance of Long-term Debt													$ 346,800,000		0
Southwestern Electric Power Co [Member] | Related Party
Short-term Debt:
Net Borrowings from Money Pool					48,900,000								48,900,000				310,700,000
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					14,500,000				18,200,000				40,700,000		43,700,000
Financing Activities (Textuals)
Net Loans To Money Pool					2,700,000								2,700,000				$ 2,100,000
Southwestern Electric Power Co [Member] | Wholesale Transmission [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					42,400,000	[22]			42,300,000	[23]			123,600,000	[24]	116,800,000	[25]
Southwestern Electric Power Co [Member] | Wholesale Transmission [Member] | Related Party
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					17,000,000								43,000,000
Southwestern Electric Power Co [Member] | Other Revenues [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					6,000,000.0	[26]			7,600,000	[27]			20,900,000	[28]	18,900,000	[29]
Southwestern Electric Power Co [Member] | Wholesale Generation [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					36,800,000	[30]			87,600,000	[31]			120,300,000	[32]	206,200,000	[33]
Southwestern Electric Power Co [Member] | Residential [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					286,500,000				285,500,000				647,500,000		650,000,000.0
Southwestern Electric Power Co [Member] | Commercial [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					174,900,000				182,300,000				472,200,000		458,800,000
Southwestern Electric Power Co [Member] | Industrial [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					105,500,000				108,300,000				320,300,000	[34]	290,100,000	[35]
Southwestern Electric Power Co [Member] | Other Retail [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					2,400,000				600,000				7,600,000		7,400,000
Southwestern Electric Power Co [Member] | Retail [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					569,300,000				576,700,000				1,447,600,000		1,406,300,000
Southwestern Electric Power Co [Member] | Wholesale and Competitive [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					79,200,000				129,900,000				243,900,000		323,000,000.0
Southwestern Electric Power Co [Member] | Affiliated and Nonaffiliated [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					654,500,000				714,200,000				1,712,400,000		1,748,200,000
Southwestern Electric Power Co [Member] | Other Revenues [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					500,000				500,000				1,800,000		1,500,000
Southwestern Electric Power Co [Member] | Servicing Contracts [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold					5,200,000				3,200,000				$ 13,900,000		$ 6,000,000.0
Southwestern Electric Power Co [Member] | Utility [Member]
Maximum Interest Rate													5.81%		3.39%
Minimum Interest Rate													4.66%		0.10%
Money Pool Participants Money Pool Activity And Authorized Borrowing Limits
Maximum Borrowings from Money Pool	[38]												$ 401,600,000
Maximum Loans to Money Pool													25,800,000
Average Borrowings from Money Pool													165,300,000
Average Loans to Money Pool													16,500,000
Authorized Short Term Borrowing Limit													$ 400,000,000.0
Average Interest Rates for Funds Borrowed From and Loaned to Money Pool
Average Interest Rate For Funds Borrowed													5.25%		1.67%
Average Interest Rate For Funds Loaned													5.72%		0.55%
Financing Activities (Textuals)
Amount Exceeding Maximum Borrowings from Money Pool			$ 1,600,000
Southwestern Electric Power Co [Member] | Utility [Member] | Related Party
Short-term Debt:
Net Borrowings from Money Pool					(48,900,000)								$ (48,900,000)
Southwestern Electric Power Co [Member] | Nonutility [Member]
Money Pool Participants Money Pool Activity And Authorized Borrowing Limits
Maximum Loans to Money Pool													2,700,000
Average Loans to Money Pool													$ 2,300,000
Maximum and Minimum Interest Rates
Maximum Interest Rate For Funds Loaned													5.81%		3.39%
Minimum Interest Rate for Funds Loaned													4.66%		0.46%
Average Interest Rates for Funds Borrowed From and Loaned to Money Pool
Average Interest Rate For Funds Loaned													5.49%		1.52%
Southwestern Electric Power Co [Member] | Nonutility [Member] | Related Party
Financing Activities (Textuals)
Net Loans To Money Pool					$ 2,700,000								$ 2,700,000
Southwestern Electric Power Co [Member] | Notes Payable, Other Payable Seven [Member]
Long-term Debt and Other Securities Issued, Retired and Principal Payments Made
Repayments of Long-term Debt													$ 25,000,000.0
Due Date													2024
Interest Rate (Percentage)					6.37%								6.37%
Southwestern Electric Power Co [Member] | Notes Payable, Other Payable Eight [Member]
Long-term Debt and Other Securities Issued, Retired and Principal Payments Made
Repayments of Long-term Debt													$ 30,900,000
Due Date													2032
Interest Rate (Percentage)					4.58%								4.58%
Southwestern Electric Power Co [Member] | Other Long Term Debt Six
Long-term Debt and Other Securities Issued, Retired and Principal Payments Made
Repayments of Long-term Debt													$ 38,200,000
Due Date													2028
Interest Rate (Percentage)					4.68%								4.68%
Southwestern Electric Power Co [Member] | Senior Unsecured Notes Seven
Long-term Debt and Other Securities Issued, Retired and Principal Payments Made
Proceeds from Issuance of Debt	[3]												$ 350,000,000.0
Due Date													2033
Interest Rate (Percentage)					5.30%								5.30%
Southwestern Electric Power Co [Member] | Loans Payable [Member]
Short-term Debt:
Weighted Average Interest Rate	[5]				7.67%								7.67%				0.00%
Transource Energy [Member] | Other Long Term Debt Two [Member]
Long-term Debt and Other Securities Issued, Retired and Principal Payments Made
Proceeds from Issuance of Debt	[3]												$ 14,000,000.0
Due Date													2025
Interest Rate (Variable)													Variable
Transource Energy [Member] | Other Long Term Debt Seven | Subsequent Event [Member]
Long-term Debt and Other Securities Issued, Retired and Principal Payments Made
Proceeds from Issuance of Debt				$ 3,500,000
Transource Energy [Member] | Senior Unsecured Notes Eleven
Long-term Debt and Other Securities Issued, Retired and Principal Payments Made
Repayments of Long-term Debt													$ 2,600,000
Due Date													2050
Interest Rate (Percentage)					2.75%								2.75%
Kentucky Power Co [Member] | Pollution Control Bond Two [Member]
Long-term Debt and Other Securities Issued, Retired and Principal Payments Made
Proceeds from Issuance of Debt	[3]												$ 65,000,000.0
Due Date													2026
Interest Rate (Percentage)					4.70%								4.70%
Kentucky Power Co [Member] | Pollution Control Bond Four
Long-term Debt and Other Securities Issued, Retired and Principal Payments Made
Repayments of Long-term Debt													$ 65,000,000.0
Due Date													2023
Interest Rate (Percentage)					2.35%								2.35%
Additional Paid-in Capital [Member]
Financing Activities (Textuals)
Forward Equity Purchase Contract Included in Current and Noncurrent Liabilities as of September 30,					$ (6,700,000)		$ (3,300,000)	$ 12,700,000	$ (3,000,000.0)		$ (17,200,000)	$ 15,200,000

[1] Pursuant to the Nuclear Waste Policy Act of 1982, I&M, a nuclear licensee, has an obligation to the United States Department of Energy for SNF disposal. The obligation includes a one-time fee for nuclear fuel consumed prior to April 7, 1983. Trust fund assets related to this obligation were $345 million and $330 million as of September 30, 2023 and December 31, 2022, respectively, and are included in Spent Nuclear Fuel and Decommissioning Trusts on the balance sheets.

[2] See “Equity Units” section below for additional information.

[3] Amounts indicated on the statements of cash flows are net of issuance costs and premium or discount and will not tie to the issuance amounts.

[4] Amount of securitized debt for receivables as accounted for under the “Transfers and Servicing” accounting guidance.

[5] Weighted-average rate as of September 30, 2023 and December 31, 2022, respectively.

[6] Corporate and Other primarily includes the purchasing of receivables from certain AEP utility subsidiaries. This segment also includes Parent’s guarantee revenue received from affiliates, investment income, interest income, interest expense and other nonallocated costs.

[7] Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for AEP Transmission Holdco was $366 million. The remaining affiliated amounts were immaterial.

[8] Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for AEP Transmission Holdco was $342 million. The remaining affiliated amounts were immaterial.

[9] Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for AEP Transmission Holdco was $1.1 billion. The affiliated revenue for Vertically Integrated Utilities was $125 million. The remaining affiliated amounts were immaterial.

[10] Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for AEP Transmission Holdco was $1 billion. The affiliated revenue for Vertically Integrated Utilities was $120 million. The remaining affiliated amounts were immaterial.

[11] Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for Corporate and Other was $32 million. The remaining affiliated amounts were immaterial.

[12] Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for Corporate and Other was $18 million. The remaining affiliated amounts were immaterial.

[13] Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for Corporate and Other was $87 million. The remaining affiliated amounts were immaterial.

[14] Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for Corporate and Other was $36 million. The remaining affiliated amounts were immaterial.

[15] Amounts include affiliated and nonaffiliated revenues

[16] Amounts include affiliated and nonaffiliated revenues.

[17] Amounts include affiliated and nonaffiliated revenues.

[18] Amounts include affiliated and nonaffiliated revenues

[19] Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for Generation & Marketing was $37 million. The remaining affiliated amounts were immaterial.

[20] Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for Generation & Marketing was $47 million. The remaining affiliated amounts were immaterial.

[21] Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for Generation & Marketing was $11 million. The remaining affiliated amounts were immaterial.

[22] Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for AEPTCo was $363 million, APCo was $22 million and SWEPCo was $17 million. The remaining affiliated amounts were immaterial.

[23] Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for AEPTCo was $339 million. The remaining affiliated amounts were immaterial.

[24] Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for AEPTCo was $1.1 billion, APCo was $64 million and SWEPCo was $43 million. The remaining affiliated amounts were immaterial.

[25] Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for AEPTCo was $992 million. The remaining affiliated amounts were immaterial.

[26] Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for I&M was $18 million primarily related to barging, urea transloading and other transportation services. The remaining affiliated amounts were immaterial.

[27] Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for I&M was $15 million primarily related to barging, urea transloading and other transportation services. The remaining affiliated amounts were immaterial.

[28] Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for I&M was $52 million primarily relating to barging, urea transloading and other transportation services. The remaining affiliated amounts were immaterial.

[29] Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for I&M was $44 million primarily relating to barging, urea transloading and other transportation services. The remaining affiliated amounts were immaterial.

[30] Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for APCo was $36 million primarily related to the PPA with KGPCo.

[31] Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for APCo was $44 million primarily related to the PPA with KGPCo.

[32] Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for APCo was $121 million primarily relating to the PPA with KGPCo. The remaining affiliated amounts were immaterial.

[33] Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for APCo was $122 million primarily relating to the PPA with KGPCo.

[34] Amounts include affiliated and nonaffiliated revenues.

[35] Amounts include affiliated and nonaffiliated revenues.

[36] (a)    Amount represents the combined authorized short-term borrowing limit the State Transcos have from FERC or state regulatory commissions.

[37] (a)    Amount represents the combined authorized short-term borrowing limit the State Transcos have from FERC or state regulatory commissions.

[38] SWEPCo’s maximum borrowings from the Utility Money Pool exceeded the authorized short-term borrowing limit by $1.6 million on March 15, 2023. On March 16, 2023, SWEPCo’s borrowings from the Utility Money Pool were reduced below the $400 million authorized limit and borrowings have continued to remain below the authorized limit.

XML

Variable Interest Entities (Details) - USD ($) $ in Millions	Sep. 30, 2023		Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022		Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021
ASSETS
Current Assets	$ 6,736.6				$ 6,775.5
Net Property, Plant and Equipment	75,821.1				73,339.1
Other Noncurrent Assets	12,567.9				13,288.7
Total Assets	95,125.6				93,403.3
LIABILITIES AND EQUITY
Current Liabilities	11,278.1				13,266.3
Noncurrent Liabilities	58,422.8				55,968.7
Equity	25,349.6		$ 24,123.6	$ 23,967.8	24,122.4		$ 24,512.3	$ 24,297.0	$ 24,038.1	$ 22,680.2
Total Liabilities and Equity	95,125.6				93,403.3
Southwestern Electric Power Co [Member]
ASSETS
Current Assets	592.5				812.2
Net Property, Plant and Equipment	8,562.5				8,262.2
Other Noncurrent Assets	1,406.1				1,304.4
Total Assets	10,561.1				10,378.8
LIABILITIES AND EQUITY
Current Liabilities	699.9				947.7
Noncurrent Liabilities	5,982.4				5,756.3
Equity	3,878.8		3,795.5	3,765.2	3,674.8		3,705.1	3,611.1	3,543.8	3,149.8
Total Liabilities and Equity	10,561.1				10,378.8
Indiana Michigan Power Co [Member]
ASSETS
Current Assets	499.0				571.8
Net Property, Plant and Equipment	7,535.7				7,411.5
Other Noncurrent Assets	4,231.8				4,135.6
Total Assets	12,266.5				12,118.9
LIABILITIES AND EQUITY
Current Liabilities	624.0				1,197.1
Noncurrent Liabilities	8,502.3				7,913.5
Equity	3,140.2		3,120.7	3,077.3	3,008.3		2,968.3	2,893.3	2,849.5	2,784.7
Total Liabilities and Equity	12,266.5				12,118.9
AEP Texas Inc. [Member]
ASSETS
Current Assets	624.8				446.9
Net Property, Plant and Equipment	12,590.8				11,681.6
Other Noncurrent Assets	742.1				763.7
Total Assets	13,957.7				12,892.2
LIABILITIES AND EQUITY
Current Liabilities	780.8				1,043.8
Noncurrent Liabilities	8,466.4				7,944.1
Equity	4,710.5		4,334.6	4,051.3	3,904.3		3,850.0	3,755.6	3,664.1	3,594.2
Total Liabilities and Equity	13,957.7				12,892.2
Appalachian Power Co [Member]
ASSETS
Current Assets	1,231.8				1,259.6
Net Property, Plant and Equipment	12,825.1				12,379.2
Other Noncurrent Assets	1,452.8				1,583.4
Total Assets	15,509.7				15,222.2
LIABILITIES AND EQUITY
Current Liabilities	1,544.3				1,390.2
Noncurrent Liabilities	8,739.1				8,856.6
Equity	5,226.3		$ 5,133.1	$ 5,086.9	4,975.4		$ 4,914.0	$ 4,821.1	$ 4,748.0	$ 4,647.9
Total Liabilities and Equity	15,509.7				15,222.2
Sabine Mining Co [Member] | Variable Interest Entities [Member] | Southwestern Electric Power Co [Member]
ASSETS
Current Assets	4.8				108.3
Net Property, Plant and Equipment	0.0				7.2
Other Noncurrent Assets	128.1				130.0
Total Assets	132.9				245.5
LIABILITIES AND EQUITY
Current Liabilities	21.0				25.4
Noncurrent Liabilities	110.6				219.4
Equity	1.3				0.7
Total Liabilities and Equity	132.9				245.5
DCC Fuel [Member] | Variable Interest Entities [Member] | Indiana Michigan Power Co [Member]
ASSETS
Current Assets	59.9				90.2
Net Property, Plant and Equipment	104.1				179.1
Other Noncurrent Assets	51.8				94.0
Total Assets	215.8				363.3
LIABILITIES AND EQUITY
Current Liabilities	59.8				90.0
Noncurrent Liabilities	156.0				273.3
Equity	0.0				0.0
Total Liabilities and Equity	215.8				363.3
AEP Texas Central Transition Funding Co [Member] | AEP Texas Inc. [Member] | Other Noncurrent Assets [Member]
LIABILITIES AND EQUITY
Unearned Revenue	10.0				16.0
AEP Texas Central Transition Funding Co [Member] | Variable Interest Entities [Member] | AEP Texas Inc. [Member]
ASSETS
Current Assets	49.4				27.0
Net Property, Plant and Equipment	0.0				0.0
Other Noncurrent Assets	90.5	[1]			140.9	[2]
Total Assets	139.9				167.9
LIABILITIES AND EQUITY
Current Liabilities	75.3				73.2
Noncurrent Liabilities	60.3				90.4
Equity	4.3				4.3
Total Liabilities and Equity	139.9				167.9
Restoration Funding [Member] | AEP Texas Inc. [Member] | Other Noncurrent Assets [Member]
LIABILITIES AND EQUITY
Unearned Revenue	6.0				7.0
Restoration Funding [Member] | Variable Interest Entities [Member] | AEP Texas Inc. [Member]
ASSETS
Current Assets	20.9				21.1
Net Property, Plant and Equipment	0.0				0.0
Other Noncurrent Assets	151.4	[3]			168.8	[4]
Total Assets	172.3				189.9
LIABILITIES AND EQUITY
Current Liabilities	36.0				31.3
Noncurrent Liabilities	135.1				157.4
Equity	1.2				1.2
Total Liabilities and Equity	172.3				189.9
Appalachian Consumer Rate Relief Funding [Member] | Appalachian Power Co [Member] | Other Noncurrent Assets [Member]
LIABILITIES AND EQUITY
Unearned Revenue	2.0				2.0
Appalachian Consumer Rate Relief Funding [Member] | Variable Interest Entities [Member] | Appalachian Power Co [Member]
ASSETS
Current Assets	4.7				13.5
Net Property, Plant and Equipment	0.0				0.0
Other Noncurrent Assets	145.3	[5]			164.6	[6]
Total Assets	150.0				178.1
LIABILITIES AND EQUITY
Current Liabilities	28.5				29.3
Noncurrent Liabilities	119.6				146.9
Equity	1.9				1.9
Total Liabilities and Equity	150.0				178.1
AEP Credit, Inc. [Member] | Variable Interest Entities [Member]
ASSETS
Current Assets	1,259.0				1,181.0
Net Property, Plant and Equipment	0.0				0.0
Other Noncurrent Assets	9.6				9.0
Total Assets	1,268.6				1,190.0
LIABILITIES AND EQUITY
Current Liabilities	1,201.3				1,087.8
Noncurrent Liabilities	0.9				0.9
Equity	66.4				101.3
Total Liabilities and Equity	1,268.6				1,190.0
Protected Cell Of Energy Insurance Services, Inc. [Member] | Variable Interest Entities [Member]
ASSETS
Current Assets	202.9				194.5
Net Property, Plant and Equipment	0.0				0.0
Other Noncurrent Assets	0.7				0.3
Total Assets	203.6				194.8
LIABILITIES AND EQUITY
Current Liabilities	54.1				46.4
Noncurrent Liabilities	84.7				79.1
Equity	64.8				69.3
Total Liabilities and Equity	203.6				194.8
Transource Energy [Member] | Variable Interest Entities [Member]
ASSETS
Current Assets	32.8				23.5
Net Property, Plant and Equipment	499.8				482.3
Other Noncurrent Assets	4.0				2.7
Total Assets	536.6				508.5
LIABILITIES AND EQUITY
Current Liabilities	21.3				22.8
Noncurrent Liabilities	229.4				218.6
Equity	285.9				267.1
Total Liabilities and Equity	$ 536.6				508.5
Apple Blossom and Black Oak [Member] | Variable Interest Entities [Member]
ASSETS
Current Assets					8.3
Net Property, Plant and Equipment					216.5
Other Noncurrent Assets					13.6
Total Assets					238.4
LIABILITIES AND EQUITY
Current Liabilities					4.5
Noncurrent Liabilities					5.4
Equity					228.5
Total Liabilities and Equity					238.4
Santa Rita East [Member] | Variable Interest Entities [Member]
ASSETS
Current Assets					21.3
Net Property, Plant and Equipment					421.6
Other Noncurrent Assets					0.1
Total Assets					443.0
LIABILITIES AND EQUITY
Current Liabilities					9.6
Noncurrent Liabilities					7.3
Equity					426.1
Total Liabilities and Equity					443.0
Dry Lake Solar Project [Member] | Variable Interest Entities [Member]
ASSETS
Current Assets					4.0
Net Property, Plant and Equipment					142.6
Other Noncurrent Assets					0.3
Total Assets					146.9
LIABILITIES AND EQUITY
Current Liabilities					1.0
Noncurrent Liabilities					0.7
Equity					145.2
Total Liabilities and Equity					$ 146.9

[1] Includes an intercompany item eliminated in consolidation of $10 million.

[2] Includes an intercompany item eliminated in consolidation of $16 million.

[3] Includes an intercompany item eliminated in consolidation of $6 million.

[4] Includes an intercompany item eliminated in consolidation of $7 million.

[5] Includes an intercompany item eliminated in consolidation of $2 million.

[6] Includes an intercompany item eliminated in consolidation of $2 million

XML

Property, Plant and Equipment (Details) - USD ($) $ in Millions		9 Months Ended
		Sep. 30, 2023	Dec. 31, 2022
Asset Retirement Obligations (ARO)
Beginning Balance	[1],[2],[3],[4],[5],[6]	$ 2,944.9
Accretion Expense	[1],[2],[3],[4],[5],[6]	86.0
Liabilities Incurred	[1],[2],[3],[4],[5],[6]	12.9
Liabilities Settled	[1],[2],[3],[4],[5],[6]	(98.1)
Asset Retirement Obligation, Revision of Estimate	[1],[2],[3],[4],[5],[6]	13.8
Ending Balance	[1],[2],[3],[4],[5],[6]	2,959.5
Competitive Contracted Renewable Portfolio
Asset Retirement Obligations (ARO)
Liabilities Settled		(31.0)
Southwestern Electric Power Co [Member]
Asset Retirement Obligations (ARO)
Beginning Balance	[1],[3],[4],[5]	282.2
Accretion Expense	[1],[3],[4],[5]	10.0
Liabilities Incurred	[1],[3],[4],[5]	7.1
Liabilities Settled	[1],[3],[4],[5]	(37.9)
Asset Retirement Obligation, Revision of Estimate	[1],[3],[4],[5]	0.4
Ending Balance	[1],[3],[4],[5]	261.8
Pirkey Power Plant and Dolet Hills Power Station | Southwestern Electric Power Co [Member]
Asset Retirement Obligations (ARO)
Liabilities Settled		(35.0)
Cook plant | Indiana Michigan Power Co [Member]
Property, Plant and Equipment (Textuals)
Asset Retirement Obligations (ARO) Liability for Nuclear Decommissioning of the Cook Plant		$ 2,050.0	$ 2,000.0

[1] In 2023, SWEPCo settled $35 million of costs related to closure/reclamation work performed due to the recent retirements of the Pirkey Plant and Dolet Hills Power Station. See “Coal-Fired Generation Plants” section of Note 4 for additional information.

[2] In August 2023, AEP completed the sale of its competitive contracted renewables portfolio to a nonaffiliated party and settled ARO liabilities of $31 million. See “Disposition of the Competitive Contracted Renewables Portfolio” section of Note 6 for additional information

[3] Includes ARO related to Sabine and DHLC.

[4] Includes ARO related to asbestos removal.

[5] Includes ARO related to ash disposal facilities.

[6] Includes ARO related to nuclear decommissioning costs for the Cook Plant of $2.05 billion and $2 billion as of September 30, 2023 and December 31, 2022, respectively.

XML

Revenue from Contracts with Customers (Details) - USD ($) $ in Millions		3 Months Ended				9 Months Ended
		Sep. 30, 2023		Sep. 30, 2022		Sep. 30, 2023		Sep. 30, 2022		Dec. 31, 2022
Disaggregation of Revenue
Revenue from Contracts with Customers		$ 5,341.7		$ 5,526.1		$ 14,405.1		$ 14,758.4
Revenues		5,341.7		5,526.1		14,405.1		14,758.4
Revenue, Performance Obligation
Fixed Performance Obligations		365.0				365.0
Related Party
Disaggregation of Revenue
Revenue from Contracts with Customers		0.0		0.0		0.0		0.0
Retail [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		4,158.3		4,037.0		11,405.9		10,773.3
Residential [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		2,099.2		2,019.9		5,462.5		5,312.2
Commercial [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		1,141.0		1,098.1		3,151.3		2,917.2
Industrial [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		838.5		849.7		2,572.4	[1]	2,349.9	[2]
Other Retail [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		79.6		69.3		219.7		194.0
Wholesale and Competitive [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		1,035.6		1,224.7		2,953.2		3,247.0
Wholesale Generation [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		205.8		382.8		582.1		881.7	[2]
Wholesale Transmission [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		337.6	[3]	314.8	[4]	1,015.4	[5]	991.0	[6]
Renewable Generation [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		17.3	[7]	41.8	[8]	68.5	[1]	98.7	[2]
Retail, Trading and Marketing Revenues [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		474.9	[9]	485.3		1,287.2	[10]	1,275.6	[11]
Other Revenues [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		132.3	[12]	138.0	[13]	314.8	[14]	373.8	[15]
Affiliated and Nonaffiliated [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		5,326.2		5,399.7		14,673.9		14,394.1
Alternative and Other [Member]
Disaggregation of Revenue
Revenues		15.5		126.4		(268.8)		364.3
Alternative [Member]
Disaggregation of Revenue
Revenues		7.0	[7],[16]	(1.9)	[8],[17]	(18.6)	[1],[18]	(65.1)	[2],[19]
Other Revenues [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		120.9		92.9		307.8		280.5
Revenues		8.5	[7]	128.3	[8],[20]	(250.2)	[1],[21]	429.4	[2],[22]
2023 [Member]
Revenue, Performance Obligation
Fixed Performance Obligations		22.6				22.6
2024-2025[Member]
Revenue, Performance Obligation
Fixed Performance Obligations		166.2				166.2
2026-2027 [Member]
Revenue, Performance Obligation
Fixed Performance Obligations		141.2				141.2
After 2027
Revenue, Performance Obligation
Fixed Performance Obligations		35.0				35.0
AEP Texas Inc. [Member]
Disaggregation of Revenue
Revenues		554.6		508.9		1,445.3		1,404.4
AEP Texas Inc. [Member] | Related Party
Disaggregation of Revenue
Revenue from Contracts with Customers		1.2		0.9		3.7		2.6
Revenue Textuals
Affiliated Companies - Contracts with Customers		20.1				20.1				$ 11.9
AEP Texas Inc. [Member] | Retail [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		393.2		358.0		958.2		965.2
AEP Texas Inc. [Member] | Residential [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		236.2		204.0		511.8		520.8
AEP Texas Inc. [Member] | Commercial [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		112.4		107.1		310.3		312.6
AEP Texas Inc. [Member] | Industrial [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		35.4		35.4		109.9	[23]	102.6	[24]
AEP Texas Inc. [Member] | Other Retail [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		9.2		11.5		26.2		29.2
AEP Texas Inc. [Member] | Wholesale and Competitive [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		154.6		140.8		464.0		417.7
AEP Texas Inc. [Member] | Wholesale Generation [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		0.0	[25]	0.0	[26]	0.0	[27]	0.0	[28]
AEP Texas Inc. [Member] | Wholesale Transmission [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		154.6	[29]	140.8	[30]	464.0	[31]	417.7	[32]
AEP Texas Inc. [Member] | Other Revenues [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		8.8	[33]	9.5	[34]	29.2	[35]	24.4	[36]
AEP Texas Inc. [Member] | Affiliated and Nonaffiliated [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		556.6		508.3		1,451.4		1,407.3
AEP Texas Inc. [Member] | Alternative and Other [Member]
Disaggregation of Revenue
Revenues		(2.0)		0.6		(6.1)		(2.9)
AEP Texas Inc. [Member] | Alternative [Member]
Disaggregation of Revenue
Revenues		(2.0)	[37],[38]	0.6	[39],[40]	(6.1)	[23],[41]	(2.9)	[24],[42]
AEP Texas Inc. [Member] | Other Revenues [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		1.8		0.3		2.9		2.5
Revenues		0.0	[38]	0.0	[40]	0.0	[23]	0.0	[24]
AEP Texas Inc. [Member] | Short-term Contract with Customer [Member] | Related Party
Revenue Textuals
Affiliated Companies - Contracts with Customers		0.1				0.1				0.1
AEP Transmission Co [Member]
Disaggregation of Revenue
Revenues		462.7		418.5		1,349.2		1,183.3
AEP Transmission Co [Member] | Related Party
Disaggregation of Revenue
Revenue from Contracts with Customers		374.7		340.6		1,097.9		999.5
Revenue Textuals
Affiliated Companies - Contracts with Customers		123.1				123.1				119.5
AEP Transmission Co [Member] | Retail [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		0.0		0.0		0.0		0.0
AEP Transmission Co [Member] | Residential [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		0.0		0.0		0.0		0.0
AEP Transmission Co [Member] | Commercial [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		0.0		0.0		0.0		0.0
AEP Transmission Co [Member] | Industrial [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		0.0		0.0		0.0	[23]	0.0	[24]
AEP Transmission Co [Member] | Other Retail [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		0.0		0.0		0.0		0.0
AEP Transmission Co [Member] | Wholesale and Competitive [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		454.7		411.7		1,338.1		1,218.1
AEP Transmission Co [Member] | Wholesale Generation [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		0.0	[25]	0.0	[26]	0.0	[27]	0.0	[28]
AEP Transmission Co [Member] | Wholesale Transmission [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		454.7	[29]	411.7	[30]	1,338.1	[31]	1,218.1	[32]
AEP Transmission Co [Member] | Wholesale Transmission [Member] | Related Party
Disaggregation of Revenue
Revenue from Contracts with Customers		363.0		339.0		1,100.0		992.0
AEP Transmission Co [Member] | Other Revenues [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		5.0	[33]	(0.3)	[34]	12.8	[35]	(0.4)	[36]
AEP Transmission Co [Member] | Affiliated and Nonaffiliated [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		459.7		411.4		1,350.9		1,217.7
AEP Transmission Co [Member] | Alternative and Other [Member]
Disaggregation of Revenue
Revenues		3.0		7.1		(1.7)		(34.4)
AEP Transmission Co [Member] | Alternative [Member]
Disaggregation of Revenue
Revenues		3.0	[37],[38]	7.1	[39],[40]	(1.7)	[23],[41]	(34.4)	[24],[42]
AEP Transmission Co [Member] | Other Revenues [Member]
Disaggregation of Revenue
Revenues		0.0	[38]	0.0	[40]	0.0	[23]	0.0	[24]
AEP Transmission Co [Member] | Short-term Contract with Customer [Member] | Related Party
Revenue Textuals
Affiliated Companies - Contracts with Customers		122.5				122.5				113.8
Appalachian Power Co [Member]
Disaggregation of Revenue
Revenues		961.8		888.9		2,776.0		2,569.8
Revenue, Performance Obligation
Fixed Performance Obligations		74.4				74.4
Appalachian Power Co [Member] | Related Party
Disaggregation of Revenue
Revenue from Contracts with Customers		62.5		67.6		193.2		187.6
Revenue Textuals
Affiliated Companies - Contracts with Customers		91.7				91.7				94.0
Appalachian Power Co [Member] | Retail [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		802.3		705.5		2,362.2		2,139.7
Appalachian Power Co [Member] | Residential [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		397.1		360.5		1,192.4		1,131.7
Appalachian Power Co [Member] | Commercial [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		181.3		161.1		516.2		467.6
Appalachian Power Co [Member] | Industrial [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		197.1		163.3		575.4	[23]	479.0	[24]
Appalachian Power Co [Member] | Other Retail [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		26.8		20.6		78.2		61.4
Appalachian Power Co [Member] | Wholesale and Competitive [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		124.9		149.4		354.6		351.0
Appalachian Power Co [Member] | Wholesale Generation [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		79.4	[25]	107.9	[26]	223.8	[27]	227.6	[28]
Appalachian Power Co [Member] | Wholesale Generation [Member] | Related Party
Disaggregation of Revenue
Revenue from Contracts with Customers		36.0		44.0		121.0		122.0
Appalachian Power Co [Member] | Wholesale Transmission [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		45.5	[29]	41.5	[30]	130.8	[31]	123.4	[32]
Appalachian Power Co [Member] | Wholesale Transmission [Member] | Related Party
Disaggregation of Revenue
Revenue from Contracts with Customers		22.0				64.0
Appalachian Power Co [Member] | Other Revenues [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		35.2	[33]	33.7	[34]	60.0	[35]	78.6	[36]
Appalachian Power Co [Member] | Affiliated and Nonaffiliated [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		962.4		888.6		2,776.8		2,569.3
Appalachian Power Co [Member] | Alternative and Other [Member]
Disaggregation of Revenue
Revenues		(0.6)		0.3		(0.8)		0.5
Appalachian Power Co [Member] | Alternative [Member]
Disaggregation of Revenue
Revenues		(0.7)	[37],[38]	0.0	[39],[40]	(0.9)	[23],[41]	0.1	[24],[42]
Appalachian Power Co [Member] | Other Revenues [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		3.3		2.9		9.8		11.8
Revenues		0.1	[38]	0.3	[40]	0.1	[23]	0.4	[24]
Appalachian Power Co [Member] | Short-term Contract with Customer [Member] | Related Party
Revenue Textuals
Affiliated Companies - Contracts with Customers		69.3				69.3				64.5
Appalachian Power Co [Member] | 2023 [Member]
Revenue, Performance Obligation
Fixed Performance Obligations		4.0				4.0
Appalachian Power Co [Member] | 2024-2025[Member]
Revenue, Performance Obligation
Fixed Performance Obligations		32.2				32.2
Appalachian Power Co [Member] | 2026-2027 [Member]
Revenue, Performance Obligation
Fixed Performance Obligations		26.6				26.6
Appalachian Power Co [Member] | After 2027
Revenue, Performance Obligation
Fixed Performance Obligations		11.6				11.6
Indiana Michigan Power Co [Member]
Disaggregation of Revenue
Revenues		676.3		715.4		1,938.5		1,971.6
Revenue, Performance Obligation
Fixed Performance Obligations		23.2				23.2
Indiana Michigan Power Co [Member] | Related Party
Disaggregation of Revenue
Revenue from Contracts with Customers		0.6		2.0		3.7		11.1
Revenue Textuals
Affiliated Companies - Contracts with Customers		69.4				69.4				104.0
Indiana Michigan Power Co [Member] | Retail [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		550.3		549.7		1,566.4		1,540.9
Indiana Michigan Power Co [Member] | Residential [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		230.7		238.6		655.5		665.6
Indiana Michigan Power Co [Member] | Commercial [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		159.2		154.3		439.5		419.5
Indiana Michigan Power Co [Member] | Industrial [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		159.1		155.6		467.6	[23]	452.1	[24]
Indiana Michigan Power Co [Member] | Other Retail [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		1.3		1.2		3.8		3.7
Indiana Michigan Power Co [Member] | Wholesale and Competitive [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		100.6		135.1		285.8		337.2
Indiana Michigan Power Co [Member] | Wholesale Generation [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		90.2	[25]	126.3	[26]	257.7	[27]	310.9	[28]
Indiana Michigan Power Co [Member] | Wholesale Transmission [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		10.4	[29]	8.8	[30]	28.1	[31]	26.3	[32]
Indiana Michigan Power Co [Member] | Other Revenues [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		26.2	[33]	30.6	[34]	92.6	[35]	86.3	[36]
Indiana Michigan Power Co [Member] | Other Revenues [Member] | Related Party
Disaggregation of Revenue
Revenue from Contracts with Customers		18.0		15.0		52.0		44.0
Indiana Michigan Power Co [Member] | Affiliated and Nonaffiliated [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		677.1		715.4		1,944.8		1,964.4
Indiana Michigan Power Co [Member] | Alternative and Other [Member]
Disaggregation of Revenue
Revenues		(0.8)		0.0		(6.3)		7.2
Indiana Michigan Power Co [Member] | Alternative [Member]
Disaggregation of Revenue
Revenues		(2.9)	[37],[38]	0.0	[39],[40]	(8.4)	[23],[41]	7.3	[24],[42]
Indiana Michigan Power Co [Member] | Other Revenues [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		4.2		4.4		9.7		10.0
Revenues		2.1	[38]	0.0	[40]	2.1	[23]	(0.1)	[24]
Indiana Michigan Power Co [Member] | Other Revenues [Member] | Related Party
Disaggregation of Revenue
Revenue from Contracts with Customers		15.4		13.3		45.8		38.4
Indiana Michigan Power Co [Member] | Short-term Contract with Customer [Member] | Related Party
Revenue Textuals
Affiliated Companies - Contracts with Customers		50.1				50.1				75.3
Indiana Michigan Power Co [Member] | 2023 [Member]
Revenue, Performance Obligation
Fixed Performance Obligations		1.1				1.1
Indiana Michigan Power Co [Member] | 2024-2025[Member]
Revenue, Performance Obligation
Fixed Performance Obligations		8.8				8.8
Indiana Michigan Power Co [Member] | 2026-2027 [Member]
Revenue, Performance Obligation
Fixed Performance Obligations		8.8				8.8
Indiana Michigan Power Co [Member] | After 2027
Revenue, Performance Obligation
Fixed Performance Obligations		4.5				4.5
Ohio Power Co [Member]
Disaggregation of Revenue
Revenues		989.5		1,021.3		2,903.2		2,674.2
Ohio Power Co [Member] | Related Party
Disaggregation of Revenue
Revenue from Contracts with Customers		7.8		4.0		23.6		11.6
Revenue Textuals
Affiliated Companies - Contracts with Customers		129.3				129.3				100.9
Ohio Power Co [Member] | Retail [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		919.0		943.6		2,708.4		2,440.2
Ohio Power Co [Member] | Residential [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		536.3		517.9		1,491.6		1,363.3
Ohio Power Co [Member] | Commercial [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		275.3		266.1		811.6		681.9
Ohio Power Co [Member] | Industrial [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		103.6		156.1		394.0	[23]	384.8	[24]
Ohio Power Co [Member] | Other Retail [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		3.8		3.5		11.2		10.2
Ohio Power Co [Member] | Wholesale and Competitive [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		21.4		21.5		60.3		64.4
Ohio Power Co [Member] | Wholesale Generation [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		0.0	[25]	0.0	[26]	0.0	[27]	0.0	[28]
Ohio Power Co [Member] | Wholesale Transmission [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		21.4	[29]	21.5	[30]	60.3	[31]	64.4	[32]
Ohio Power Co [Member] | Other Revenues [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		49.2	[33]	64.8	[34]	127.9	[35]	169.6	[36]
Ohio Power Co [Member] | Affiliated and Nonaffiliated [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		989.6		1,029.9		2,896.6		2,674.2
Ohio Power Co [Member] | Alternative and Other [Member]
Disaggregation of Revenue
Revenues		(0.1)		(8.6)		6.6		0.0
Ohio Power Co [Member] | Alternative [Member]
Disaggregation of Revenue
Revenues		(3.1)	[37],[38]	(14.1)	[39],[40]	(13.5)	[23],[41]	(18.6)	[24],[42]
Ohio Power Co [Member] | Other Revenues [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		3.0		2.1		10.3		6.0
Revenues		3.0	[38]	5.5	[40]	20.1	[23]	18.6	[24]
Ohio Power Co [Member] | Short-term Contract with Customer [Member] | Related Party
Revenue Textuals
Affiliated Companies - Contracts with Customers		67.3				67.3				49.9
Public Service Co Of Oklahoma [Member]
Disaggregation of Revenue
Revenues		644.2		608.2		1,535.9		1,438.7
Public Service Co Of Oklahoma [Member] | Related Party
Disaggregation of Revenue
Revenue from Contracts with Customers		0.2		0.7		1.0		2.1
Revenue Textuals
Affiliated Companies - Contracts with Customers		31.9				31.9				52.2
Public Service Co Of Oklahoma [Member] | Retail [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		630.3		582.0		1,487.1		1,369.9
Public Service Co Of Oklahoma [Member] | Residential [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		310.5		299.6		667.9		650.7
Public Service Co Of Oklahoma [Member] | Commercial [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		171.9		153.4		412.7		372.1
Public Service Co Of Oklahoma [Member] | Industrial [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		114.1		98.9		320.2	[23]	270.0	[24]
Public Service Co Of Oklahoma [Member] | Other Retail [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		33.8		30.1		86.3		77.1
Public Service Co Of Oklahoma [Member] | Wholesale and Competitive [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		5.9		19.6		32.3		48.1
Public Service Co Of Oklahoma [Member] | Wholesale Generation [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		(4.9)	[25]	9.4	[26]	0.3	[27]	19.2	[28]
Public Service Co Of Oklahoma [Member] | Wholesale Transmission [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		10.8	[29]	10.2	[30]	32.0	[31]	28.9	[32]
Public Service Co Of Oklahoma [Member] | Other Revenues [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		5.4	[33]	6.4	[34]	14.9	[35]	21.4	[36]
Public Service Co Of Oklahoma [Member] | Affiliated and Nonaffiliated [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		641.6		608.0		1,534.3		1,439.4
Public Service Co Of Oklahoma [Member] | Alternative and Other [Member]
Disaggregation of Revenue
Revenues		2.6		0.2		1.6		(0.7)
Public Service Co Of Oklahoma [Member] | Alternative [Member]
Disaggregation of Revenue
Revenues		2.6	[37],[38]	0.2	[39],[40]	1.6	[23],[41]	(0.7)	[24],[42]
Public Service Co Of Oklahoma [Member] | Other Revenues [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		1.4		1.0		5.1		3.7
Revenues		0.0	[38]	0.0	[40]	0.0	[23]	0.0	[24]
Public Service Co Of Oklahoma [Member] | Short-term Contract with Customer [Member] | Related Party
Revenue Textuals
Affiliated Companies - Contracts with Customers		13.8				13.8				18.8
Southwestern Electric Power Co [Member]
Disaggregation of Revenue
Revenues		654.8		717.5		1,708.5		1,748.9
Southwestern Electric Power Co [Member] | Related Party
Disaggregation of Revenue
Revenue from Contracts with Customers		14.5		18.2		40.7		43.7
Revenue Textuals
Affiliated Companies - Contracts with Customers		43.8				43.8				65.4
Southwestern Electric Power Co [Member] | Retail [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		569.3		576.7		1,447.6		1,406.3
Southwestern Electric Power Co [Member] | Residential [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		286.5		285.5		647.5		650.0
Southwestern Electric Power Co [Member] | Commercial [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		174.9		182.3		472.2		458.8
Southwestern Electric Power Co [Member] | Industrial [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		105.5		108.3		320.3	[23]	290.1	[24]
Southwestern Electric Power Co [Member] | Other Retail [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		2.4		0.6		7.6		7.4
Southwestern Electric Power Co [Member] | Wholesale and Competitive [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		79.2		129.9		243.9		323.0
Southwestern Electric Power Co [Member] | Wholesale Generation [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		36.8	[25]	87.6	[26]	120.3	[27]	206.2	[28]
Southwestern Electric Power Co [Member] | Wholesale Transmission [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		42.4	[29]	42.3	[30]	123.6	[31]	116.8	[32]
Southwestern Electric Power Co [Member] | Wholesale Transmission [Member] | Related Party
Disaggregation of Revenue
Revenue from Contracts with Customers		17.0				43.0
Southwestern Electric Power Co [Member] | Other Revenues [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		6.0	[33]	7.6	[34]	20.9	[35]	18.9	[36]
Southwestern Electric Power Co [Member] | Affiliated and Nonaffiliated [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		654.5		714.2		1,712.4		1,748.2
Southwestern Electric Power Co [Member] | Alternative and Other [Member]
Disaggregation of Revenue
Revenues		0.3		3.3		(3.9)		0.7
Southwestern Electric Power Co [Member] | Alternative [Member]
Disaggregation of Revenue
Revenues		0.3	[37],[38]	3.3	[39],[40]	(3.9)	[23],[41]	0.7	[24],[42]
Southwestern Electric Power Co [Member] | Other Revenues [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		0.5		0.5		1.8		1.5
Revenues		0.0	[38]	0.0	[40]	0.0	[23]	0.0	[24]
Southwestern Electric Power Co [Member] | Short-term Contract with Customer [Member] | Related Party
Revenue Textuals
Affiliated Companies - Contracts with Customers		23.7				23.7				$ 19.1
Consolidation Eliminations [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		0.0		0.0		0.0		0.0
Revenues		(508.4)		(425.0)		(1,416.3)		(1,190.5)
Consolidation Eliminations [Member] | Related Party
Disaggregation of Revenue
Revenue from Contracts with Customers		(508.4)		(425.0)		(1,416.3)		(1,190.5)
Consolidation Eliminations [Member] | Retail [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		(0.3)		(0.3)		(0.6)		(0.7)
Consolidation Eliminations [Member] | Residential [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		0.0		0.0		0.0		0.0
Consolidation Eliminations [Member] | Commercial [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		0.0		0.0		0.0		0.0
Consolidation Eliminations [Member] | Industrial [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		(0.3)		(0.3)		(0.6)	[1]	(0.7)	[2]
Consolidation Eliminations [Member] | Other Retail [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		0.0		0.0		0.0		0.0
Consolidation Eliminations [Member] | Wholesale and Competitive [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		(464.6)		(395.2)		(1,282.3)		(1,103.9)
Consolidation Eliminations [Member] | Wholesale Generation [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		(0.3)		(0.2)		(0.2)		(0.1)	[2]
Consolidation Eliminations [Member] | Wholesale Transmission [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		(425.1)	[3]	(392.7)	[4]	(1,229.7)	[5]	(1,086.5)	[6]
Consolidation Eliminations [Member] | Renewable Generation [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		(2.5)	[7]	(2.5)	[8]	(5.7)	[1]	(6.2)	[2]
Consolidation Eliminations [Member] | Retail, Trading and Marketing Revenues [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		(36.7)	[9]	0.2		(46.7)	[10]	(11.1)	[11]
Consolidation Eliminations [Member] | Other Revenues [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		(48.5)	[12]	(31.9)	[13]	(132.1)	[14]	(71.6)	[15]
Consolidation Eliminations [Member] | Affiliated and Nonaffiliated [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		(513.4)		(427.4)		(1,415.0)		(1,176.2)
Consolidation Eliminations [Member] | Alternative and Other [Member]
Disaggregation of Revenue
Revenues		5.0		2.4		(1.3)		(14.3)
Consolidation Eliminations [Member] | Alternative [Member]
Disaggregation of Revenue
Revenues		5.7	[7],[16]	4.4	[8],[17]	2.3	[1],[18]	(7.4)	[2],[19]
Consolidation Eliminations [Member] | Other Revenues [Member]
Disaggregation of Revenue
Revenues		(0.7)	[7]	(2.0)	[8],[20]	(3.6)	[1],[21]	(6.9)	[2],[22]
Consolidation Eliminations [Member] | AEP Transmission Co [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		0.0		0.0		0.0		0.0
Revenues		0.0		0.0		0.0		0.0
Consolidation Eliminations [Member] | AEP Transmission Co [Member] | Related Party
Disaggregation of Revenue
Revenue from Contracts with Customers		0.0		0.0		0.0		0.0
Vertically Integrated Utilities [Member]
Disaggregation of Revenue
Revenues		3,205.4		3,226.3		8,737.7		8,562.2
Vertically Integrated Utilities [Member] | Related Party
Disaggregation of Revenue
Revenue from Contracts with Customers		47.3		51.7		134.3		145.8
Vertically Integrated Utilities [Member] | Retail [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		2,846.5		2,735.9		7,739.9		7,368.8
Vertically Integrated Utilities [Member] | Residential [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		1,326.7		1,298.0		3,459.1		3,428.1
Vertically Integrated Utilities [Member] | Commercial [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		753.3		725.1		2,029.4		1,922.8
Vertically Integrated Utilities [Member] | Industrial [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		699.9		658.5		2,069.1	[1]	1,863.3	[2]
Vertically Integrated Utilities [Member] | Other Retail [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		66.6		54.3		182.3		154.6
Vertically Integrated Utilities [Member] | Wholesale and Competitive [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		294.9		419.6		847.3		1,009.2
Vertically Integrated Utilities [Member] | Wholesale Generation [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		174.3		299.3		498.5		674.8	[2]
Vertically Integrated Utilities [Member] | Wholesale Transmission [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		120.6	[3]	120.3	[4]	348.8	[5]	334.4	[6]
Vertically Integrated Utilities [Member] | Wholesale Transmission [Member] | Related Party
Disaggregation of Revenue
Revenue from Contracts with Customers						125.0		120.0
Vertically Integrated Utilities [Member] | Renewable Generation [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		0.0	[7]	0.0	[8]	0.0	[1]	0.0	[2]
Vertically Integrated Utilities [Member] | Retail, Trading and Marketing Revenues [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		0.0	[9]	0.0		0.0	[10]	0.0	[11]
Vertically Integrated Utilities [Member] | Other Revenues [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		61.3	[12]	69.7	[13]	155.8	[14]	180.5	[15]
Vertically Integrated Utilities [Member] | Affiliated and Nonaffiliated [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		3,202.7		3,225.2		8,743.0		8,558.5
Vertically Integrated Utilities [Member] | Alternative and Other [Member]
Disaggregation of Revenue
Revenues		2.7		1.1		(5.3)		3.7
Vertically Integrated Utilities [Member] | Alternative [Member]
Disaggregation of Revenue
Revenues		0.5	[7],[16]	0.9	[8],[17]	(7.5)	[1],[18]	3.4	[2],[19]
Vertically Integrated Utilities [Member] | Other Revenues [Member]
Disaggregation of Revenue
Revenues		2.2	[7]	0.2	[8],[20]	2.2	[1],[21]	0.3	[2],[22]
Transmission And Distribution Utilities [Member]
Disaggregation of Revenue
Revenues		1,544.1		1,530.2		4,348.5		4,078.6
Transmission And Distribution Utilities [Member] | Related Party
Disaggregation of Revenue
Revenue from Contracts with Customers		8.9		4.7		27.2		14.1
Transmission And Distribution Utilities [Member] | Retail [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		1,312.1		1,301.4		3,666.6		3,405.2
Transmission And Distribution Utilities [Member] | Residential [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		772.5		721.9		2,003.4		1,884.1
Transmission And Distribution Utilities [Member] | Commercial [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		387.7		373.0		1,121.9		994.4
Transmission And Distribution Utilities [Member] | Industrial [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		138.9		191.5		503.9	[1]	487.3	[2]
Transmission And Distribution Utilities [Member] | Other Retail [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		13.0		15.0		37.4		39.4
Transmission And Distribution Utilities [Member] | Wholesale and Competitive [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		176.0		162.3		524.3		482.1
Transmission And Distribution Utilities [Member] | Wholesale Generation [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		0.0		0.0		0.0		0.0	[2]
Transmission And Distribution Utilities [Member] | Wholesale Transmission [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		176.0	[3]	162.3	[4]	524.3	[5]	482.1	[6]
Transmission And Distribution Utilities [Member] | Renewable Generation [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		0.0	[7]	0.0	[8]	0.0	[1]	0.0	[2]
Transmission And Distribution Utilities [Member] | Retail, Trading and Marketing Revenues [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		0.0	[9]	0.0		0.0	[10]	0.0	[11]
Transmission And Distribution Utilities [Member] | Other Revenues [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		58.2	[12]	74.5	[13]	157.1	[14]	194.2	[15]
Transmission And Distribution Utilities [Member] | Affiliated and Nonaffiliated [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		1,546.3		1,538.2		4,348.0		4,081.5
Transmission And Distribution Utilities [Member] | Alternative and Other [Member]
Disaggregation of Revenue
Revenues		(2.2)		(8.0)		0.5		(2.9)
Transmission And Distribution Utilities [Member] | Alternative [Member]
Disaggregation of Revenue
Revenues		(5.0)	[7],[16]	(13.5)	[8],[17]	(19.5)	[1],[18]	(21.5)	[2],[19]
Transmission And Distribution Utilities [Member] | Other Revenues [Member]
Disaggregation of Revenue
Revenues		2.8	[7]	5.5	[8],[20]	20.0	[1],[21]	18.6	[2],[22]
AEP Transmission Holdco [Member]
Disaggregation of Revenue
Revenues		476.7		430.9		1,390.8		1,221.1
AEP Transmission Holdco [Member] | Retail [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		0.0		0.0		0.0		0.0
AEP Transmission Holdco [Member] | Residential [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		0.0		0.0		0.0		0.0
AEP Transmission Holdco [Member] | Commercial [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		0.0		0.0		0.0		0.0
AEP Transmission Holdco [Member] | Industrial [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		0.0		0.0		0.0	[1]	0.0	[2]
AEP Transmission Holdco [Member] | Other Retail [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		0.0		0.0		0.0		0.0
AEP Transmission Holdco [Member] | Wholesale and Competitive [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		466.1		424.9		1,372.0		1,261.0
AEP Transmission Holdco [Member] | Wholesale Generation [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		0.0		0.0		0.0		0.0	[2]
AEP Transmission Holdco [Member] | Wholesale Transmission [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		466.1	[3]	424.9	[4]	1,372.0	[5]	1,261.0	[6]
AEP Transmission Holdco [Member] | Wholesale Transmission [Member] | Related Party
Disaggregation of Revenue
Revenue from Contracts with Customers		366.0		342.0		1,100.0		1,000.0
AEP Transmission Holdco [Member] | Renewable Generation [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		0.0	[7]	0.0	[8]	0.0	[1]	0.0	[2]
AEP Transmission Holdco [Member] | Retail, Trading and Marketing Revenues [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		0.0	[9]	0.0		0.0	[10]	0.0	[11]
AEP Transmission Holdco [Member] | Other Revenues [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		4.8	[12]	(0.3)	[13]	12.7	[14]	(0.3)	[15]
AEP Transmission Holdco [Member] | Affiliated and Nonaffiliated [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		470.9		424.6		1,384.7		1,260.7
AEP Transmission Holdco [Member] | Alternative and Other [Member]
Disaggregation of Revenue
Revenues		5.8		6.3		6.1		(39.6)
AEP Transmission Holdco [Member] | Alternative [Member]
Disaggregation of Revenue
Revenues		5.8	[7],[16]	6.3	[8],[17]	6.1	[1],[18]	(39.6)	[2],[19]
AEP Transmission Holdco [Member] | Other Revenues [Member]
Disaggregation of Revenue
Revenues		0.0	[7]	0.0	[8],[20]	0.0	[1],[21]	0.0	[2],[22]
Generation And Marketing [Member]
Disaggregation of Revenue
Revenues		566.7		735.4		1,225.1		2,014.3
Generation And Marketing [Member] | Related Party
Disaggregation of Revenue
Revenue from Contracts with Customers		39.2		2.3		52.5		17.3
Generation And Marketing [Member] | Retail [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		0.0		0.0		0.0		0.0
Generation And Marketing [Member] | Residential [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		0.0		0.0		0.0		0.0
Generation And Marketing [Member] | Commercial [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		0.0		0.0		0.0		0.0
Generation And Marketing [Member] | Industrial [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		0.0		0.0		0.0	[1]	0.0	[2]
Generation And Marketing [Member] | Other Retail [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		0.0		0.0		0.0		0.0
Generation And Marketing [Member] | Wholesale and Competitive [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		562.4		610.9		1,490.2		1,591.9
Generation And Marketing [Member] | Wholesale Generation [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		31.8		83.7		83.8		207.0	[2]
Generation And Marketing [Member] | Wholesale Transmission [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		0.0	[3]	0.0	[4]	0.0	[5]	0.0	[6]
Generation And Marketing [Member] | Renewable Generation [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		19.8	[7]	44.3	[8]	74.2	[1]	104.9	[2]
Generation And Marketing [Member] | Retail, Trading and Marketing Revenues [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		510.8	[9]	482.9		1,332.2	[10]	1,280.0	[11]
Generation And Marketing [Member] | Retail, Trading and Marketing Revenues [Member] | Related Party
Disaggregation of Revenue
Revenue from Contracts with Customers		37.0				47.0		11.0
Generation And Marketing [Member] | Other Revenues [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		0.9	[12]	1.7	[13]	7.7	[14]	11.9	[15]
Generation And Marketing [Member] | Affiliated and Nonaffiliated [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		563.3		612.6		1,497.9		1,603.8
Generation And Marketing [Member] | Alternative and Other [Member]
Disaggregation of Revenue
Revenues		3.4		122.8		(272.8)		410.5
Generation And Marketing [Member] | Alternative [Member]
Disaggregation of Revenue
Revenues		0.0	[7],[16]	0.0	[8],[17]	0.0	[1],[18]	0.0	[2],[19]
Generation And Marketing [Member] | Other Revenues [Member]
Disaggregation of Revenue
Revenues		3.4	[7],[43]	122.8	[8],[20]	(272.8)	[1],[21]	410.5	[2],[22]
Other Segments [Member]
Disaggregation of Revenue
Revenues	[44]	57.2		28.3		119.3		72.7
Other Segments [Member] | Related Party
Disaggregation of Revenue
Revenue from Contracts with Customers	[44]	30.3		17.3		83.9		36.6
Other Segments [Member] | Retail [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		0.0		0.0		0.0		0.0
Other Segments [Member] | Residential [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		0.0		0.0		0.0		0.0
Other Segments [Member] | Commercial [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		0.0		0.0		0.0		0.0
Other Segments [Member] | Industrial [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		0.0		0.0		0.0	[1]	0.0	[2]
Other Segments [Member] | Other Retail [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		0.0		0.0		0.0		0.0
Other Segments [Member] | Wholesale and Competitive [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		0.8		2.2		1.7		6.7
Other Segments [Member] | Wholesale Generation [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		0.0		0.0		0.0		0.0	[2]
Other Segments [Member] | Wholesale Transmission [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		0.0	[3]	0.0	[4]	0.0	[5]	0.0	[6]
Other Segments [Member] | Renewable Generation [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		0.0	[7]	0.0	[8]	0.0	[1]	0.0	[2]
Other Segments [Member] | Retail, Trading and Marketing Revenues [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		0.8	[9]	2.2		1.7	[10]	6.7	[11]
Other Segments [Member] | Other Revenues [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		55.6	[12]	24.3	[13]	113.6	[14]	59.1	[15]
Other Segments [Member] | Affiliated and Nonaffiliated [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		56.4		26.5		115.3		65.8
Other Segments [Member] | Alternative and Other [Member]
Disaggregation of Revenue
Revenues		0.8		1.8		4.0		6.9
Other Segments [Member] | Alternative [Member]
Disaggregation of Revenue
Revenues		0.0	[7],[16]	0.0	[8],[17]	0.0	[1],[18]	0.0	[2],[19]
Other Segments [Member] | Other Revenues [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers	[44]	26.9		11.0		35.4		36.1
Revenues		0.8	[7]	1.8	[8],[20]	4.0	[1],[21]	6.9	[2],[22]
Corporate and Other | Other Revenues [Member] | Related Party
Disaggregation of Revenue
Revenue from Contracts with Customers		$ 32.0		$ 18.0
Corporate and Other | Other Revenues [Member] | Related Party
Disaggregation of Revenue
Revenue from Contracts with Customers						$ 87.0		$ 36.0

[1] Amounts include affiliated and nonaffiliated revenues.

[2] Amounts include affiliated and nonaffiliated revenues

[3] Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for AEP Transmission Holdco was $366 million. The remaining affiliated amounts were immaterial.

[4] Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for AEP Transmission Holdco was $342 million. The remaining affiliated amounts were immaterial.

[5] Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for AEP Transmission Holdco was $1.1 billion. The affiliated revenue for Vertically Integrated Utilities was $125 million. The remaining affiliated amounts were immaterial.

[6] Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for AEP Transmission Holdco was $1 billion. The affiliated revenue for Vertically Integrated Utilities was $120 million. The remaining affiliated amounts were immaterial.

[7] Amounts include affiliated and nonaffiliated revenues.

[8] Amounts include affiliated and nonaffiliated revenues

[9] Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for Generation & Marketing was $37 million. The remaining affiliated amounts were immaterial.

[10] Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for Generation & Marketing was $47 million. The remaining affiliated amounts were immaterial.

[11] Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for Generation & Marketing was $11 million. The remaining affiliated amounts were immaterial.

[12] Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for Corporate and Other was $32 million. The remaining affiliated amounts were immaterial.

[13] Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for Corporate and Other was $18 million. The remaining affiliated amounts were immaterial.

[14] Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for Corporate and Other was $87 million. The remaining affiliated amounts were immaterial.

[15] Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for Corporate and Other was $36 million. The remaining affiliated amounts were immaterial.

[16] Alternative revenue programs in certain jurisdictions include regulatory mechanisms that periodically adjust for over/under collection of related revenues.

[17] Alternative revenue programs in certain jurisdictions include regulatory mechanisms that periodically adjust for over/under collection of related revenues.

[18] Alternative revenue programs in certain jurisdictions include regulatory mechanisms that periodically adjust for over/under collection of related revenues.

[19] Alternative revenue programs in certain jurisdictions include regulatory mechanisms that periodically adjust for over/under collection of related revenues.

[20] Generation & Marketing includes economic hedge activity.

[21] Generation & Marketing includes economic hedge activity.

[22] Generation & Marketing includes economic hedge activity.

[23] Amounts include affiliated and nonaffiliated revenues.

[24] Amounts include affiliated and nonaffiliated revenues.

[25] Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for APCo was $36 million primarily related to the PPA with KGPCo.

[26] Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for APCo was $44 million primarily related to the PPA with KGPCo.

[27] Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for APCo was $121 million primarily relating to the PPA with KGPCo. The remaining affiliated amounts were immaterial.

[28] Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for APCo was $122 million primarily relating to the PPA with KGPCo.

[29] Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for AEPTCo was $363 million, APCo was $22 million and SWEPCo was $17 million. The remaining affiliated amounts were immaterial.

[30] Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for AEPTCo was $339 million. The remaining affiliated amounts were immaterial.

[31] Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for AEPTCo was $1.1 billion, APCo was $64 million and SWEPCo was $43 million. The remaining affiliated amounts were immaterial.

[32] Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for AEPTCo was $992 million. The remaining affiliated amounts were immaterial.

[33] Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for I&M was $18 million primarily related to barging, urea transloading and other transportation services. The remaining affiliated amounts were immaterial.

[34] Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for I&M was $15 million primarily related to barging, urea transloading and other transportation services. The remaining affiliated amounts were immaterial.

[35] Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for I&M was $52 million primarily relating to barging, urea transloading and other transportation services. The remaining affiliated amounts were immaterial.

[36] Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for I&M was $44 million primarily relating to barging, urea transloading and other transportation services. The remaining affiliated amounts were immaterial.

[37] Alternative revenue programs in certain jurisdictions include regulatory mechanisms that periodically adjust for over/under collection of related revenues.

[38] Amounts include affiliated and nonaffiliated revenues.

[39] Alternative revenue programs in certain jurisdictions include regulatory mechanisms that periodically adjust for over/under collection of related revenues.

[40] Amounts include affiliated and nonaffiliated revenues.

[41] Alternative revenue programs in certain jurisdictions include regulatory mechanisms that periodically adjust for over/under collection of related revenues.

[42] Alternative revenue programs in certain jurisdictions include regulatory mechanisms that periodically adjust for over/under collection of related revenues.

[43] Generation & Marketing includes economic hedge activity.

[44] Corporate and Other primarily includes the purchasing of receivables from certain AEP utility subsidiaries. This segment also includes Parent’s guarantee revenue received from affiliates, investment income, interest income, interest expense and other nonallocated costs.