Cover
12 Months Ended
Dec. 31, 2019
USD ($)
shares
Entity Information [Line Items] 
Document Type10-K
Document Annual Reporttrue
Document Period End DateDec. 31, 2019
Document Transition Reportfalse
Entity File Number1-3525
Entity Registrant NameAMERICAN ELECTRIC POWER CO INC.
Entity Incorporation, State or Country CodeNY
Entity Tax Identification Number13-4922640
Entity Address, Address Line One1 Riverside Plaza,
Entity Address, City or TownColumbus,
Entity Address, State or ProvinceOH
Entity Address, Postal Zip Code43215-2373
City Area Code(614)
Local Phone Number716-1000
Entity Well-known Seasoned IssuerYes
Entity Voluntary FilersNo
Entity Current Reporting StatusYes
Entity Interactive Data CurrentYes
Entity Filer CategoryLarge Accelerated Filer
Entity Small Businessfalse
Entity Emerging Growth Companyfalse
Entity Shell Companyfalse
Entity Public Float | $$ 43,491,855,142
Entity Common Stock, Shares Outstanding494,169,471
Documents Incorporated by Reference
Documents Incorporated By Reference
Description
 
Part of Form 10-K into which Document is Incorporated
 
 
 
Portions of Annual Reports of the following companies for the fiscal year ended December 31, 2019:
 
Part II
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
 
 
Southwestern Electric Power Company
 
 
 
 
 
Portions of Proxy Statement of American Electric Power Company, Inc. for 2020 Annual Meeting of Shareholders.
 
Part III

Entity Central Index Key0000004904
Amendment Flagfalse
Document Fiscal Year Focus2019
Document Fiscal Period FocusFY
Current Fiscal Year End Date--12-31
AEP Texas Inc. [Member] 
Entity Information [Line Items] 
Entity File Number333-221643
Entity Registrant NameAEP TEXAS INC.
Entity Incorporation, State or Country CodeDE
Entity Tax Identification Number51-0007707
Entity Well-known Seasoned IssuerNo
Entity Voluntary FilersNo
Entity Filer CategoryNon-accelerated Filer
Entity Small Businessfalse
Entity Emerging Growth Companyfalse
Entity Common Stock, Shares Outstanding100,000,000
Entity Central Index Key0001721781
AEP Transmission Co [Member] 
Entity Information [Line Items] 
Entity File Number333-217143
Entity Registrant NameAEP TRANSMISSION COMPANY, LLC
Entity Incorporation, State or Country CodeDE
Entity Tax Identification Number46-1125168
Entity Well-known Seasoned IssuerNo
Entity Voluntary FilersNo
Entity Filer CategoryNon-accelerated Filer
Entity Small Businessfalse
Entity Emerging Growth Companyfalse
Entity Central Index Key0001702494
Appalachian Power Co [Member] 
Entity Information [Line Items] 
Entity File Number1-3457
Entity Registrant NameAPPALACHIAN POWER COMPANY
Entity Incorporation, State or Country CodeVA
Entity Tax Identification Number54-0124790
Entity Well-known Seasoned IssuerNo
Entity Voluntary FilersNo
Entity Filer CategoryNon-accelerated Filer
Entity Small Businessfalse
Entity Emerging Growth Companyfalse
Entity Common Stock, Shares Outstanding13,499,500,000,000
Entity Central Index Key0000006879
Indiana Michigan Power Co [Member] 
Entity Information [Line Items] 
Entity File Number1-3570
Entity Registrant NameINDIANA MICHIGAN POWER COMPANY
Entity Incorporation, State or Country CodeIN
Entity Tax Identification Number35-0410455
Entity Well-known Seasoned IssuerNo
Entity Voluntary FilersNo
Entity Filer CategoryNon-accelerated Filer
Entity Small Businessfalse
Entity Emerging Growth Companyfalse
Entity Common Stock, Shares Outstanding1,400,000,000,000
Entity Central Index Key0000050172
Ohio Power Co [Member] 
Entity Information [Line Items] 
Entity File Number1-6543
Entity Registrant NameOHIO POWER COMPANY
Entity Incorporation, State or Country CodeOH
Entity Tax Identification Number31-4271000
Entity Well-known Seasoned IssuerNo
Entity Voluntary FilersNo
Entity Filer CategoryNon-accelerated Filer
Entity Small Businessfalse
Entity Emerging Growth Companyfalse
Entity Common Stock, Shares Outstanding27,952,473,000,000
Entity Central Index Key0000073986
Public Service Co Of Oklahoma [Member] 
Entity Information [Line Items] 
Entity File Number0-343
Entity Registrant NamePUBLIC SERVICE COMPANY OF OKLAHOMA
Entity Incorporation, State or Country CodeOK
Entity Tax Identification Number73-0410895
Entity Well-known Seasoned IssuerNo
Entity Voluntary FilersNo
Entity Filer CategoryNon-accelerated Filer
Entity Small Businessfalse
Entity Emerging Growth Companyfalse
Entity Common Stock, Shares Outstanding9,013,000,000,000
Entity Central Index Key0000081027
Southwestern Electric Power Co [Member] 
Entity Information [Line Items] 
Entity File Number1-3146
Entity Registrant NameSOUTHWESTERN ELECTRIC POWER COMPANY
Entity Incorporation, State or Country CodeDE
Entity Tax Identification Number72-0323455
Entity Well-known Seasoned IssuerNo
Entity Voluntary FilersNo
Entity Filer CategoryNon-accelerated Filer
Entity Small Businessfalse
Entity Emerging Growth Companyfalse
Entity Common Stock, Shares Outstanding7,536,640,000,000
Entity Central Index Key0000092487
New York Stock Exchange | Common Stock, $6.50 par value 
Entity Information [Line Items] 
Title of 12(b) SecurityCommon Stock, $6.50 par value
Trading SymbolAEP
Security Exchange NameNYSE
New York Stock Exchange | 6.125% Corporate Units 
Entity Information [Line Items] 
Title of 12(b) Security6.125% Corporate Units
Trading SymbolAEP PR B
Security Exchange NameNYSE

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