Variable Interest Entities (Details) $ in Thousands		12 Months Ended
		Dec. 31, 2023 USD ($) MW		Dec. 31, 2022 USD ($)		Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)
ASSETS
Current Assets		$ 6,082,100		$ 6,775,500
Net Property, Plant and Equipment		76,693,400		73,339,100
Other Noncurrent Assets		13,908,500		13,288,700
Total Assets		96,684,000		93,403,300
LIABILITIES AND EQUITY
Current Liabilities		11,583,600		13,266,300
Noncurrent Liabilities		59,772,000		55,968,700
Equity		25,285,900		24,122,400		$ 22,680,200	$ 20,774,500
Total Liabilities and Equity		96,684,000		93,403,300
Variable Interest Entities (Textuals)
Securitization Bonds		368,900		487,800
Securitized Assets		$ 336,300		446,000
Equity Method Investment, Ownership Percentage		50.00%
Equity Method Investments		$ 1,073,600		1,276,700		1,447,500
Equity Method Investment Income		(58,500)		109,400		(91,700)
Accounts Payable - Affiliated Companies for collected reclamation costs that have been billed to SWEPCo		2,032,500		2,670,800
Generation and Marketing [Member]
ASSETS
Total Assets		2,598,500		4,520,100
Variable Interest Entities (Textuals)
Equity Method Investments		100,600		337,600		487,800
Equity Method Investment Income		16,500		192,400		10,600
Unregulated Operation [Member]
ASSETS
Net Property, Plant and Equipment		564,300		2,031,600
Protected Cell Of Energy Insurance Services, Inc. [Member]
Variable Interest Entities (Textuals)
Insurance Premium Expense to Protected Cell		34,000		31,000		30,000
Protected Cell Of Energy Insurance Services, Inc. [Member] | Variable Interest Entities [Member]
ASSETS
Current Assets		205,300		194,500
Net Property, Plant and Equipment		0		0
Other Noncurrent Assets		0		300
Total Assets		205,300		194,800
LIABILITIES AND EQUITY
Current Liabilities		49,200		46,400
Noncurrent Liabilities		91,700		79,100
Equity		64,400		69,300
Total Liabilities and Equity		$ 205,300		194,800
Transource Energy [Member]
Variable Interest Entities (Textuals)
Debt-to-Total Capitalization Maximum		67.50%
Transource Energy [Member] | Variable Interest Entities [Member]
ASSETS
Current Assets		$ 36,900		23,500
Net Property, Plant and Equipment		533,400		482,300
Other Noncurrent Assets		5,100		2,700
Total Assets		575,400		508,500
LIABILITIES AND EQUITY
Current Liabilities		45,300		22,800
Noncurrent Liabilities		241,500		218,600
Equity		288,600		267,100
Total Liabilities and Equity		$ 575,400		508,500
Santa Rita East [Member]
Variable Interest Entities (Textuals)
Noncontrolling Interest in Variable Interest Entity				58,000
Santa Rita East [Member] | Variable Interest Entities [Member]
ASSETS
Current Assets				21,300
Net Property, Plant and Equipment				421,600
Other Noncurrent Assets				100
Total Assets				443,000
LIABILITIES AND EQUITY
Current Liabilities				9,600
Noncurrent Liabilities				7,300
Equity				426,100
Total Liabilities and Equity				443,000
AEP Credit, Inc.
Variable Interest Entities (Textuals)
Minimum Percentage of Equity AEP Provides		5.00%
Percentage Of Short Term Borrowing Needs In Excess Of Third Party Financings		35.00%
AEP Credit, Inc. | Variable Interest Entities [Member]
ASSETS
Current Assets		$ 1,208,800		1,181,000
Net Property, Plant and Equipment		0		0
Other Noncurrent Assets		9,600		9,000
Total Assets		1,218,400		1,190,000
LIABILITIES AND EQUITY
Current Liabilities		1,155,000		1,087,800
Noncurrent Liabilities		900		900
Equity		62,500		101,300
Total Liabilities and Equity		1,218,400		1,190,000
Dolet Hills Lignite Co, LLC [Member]
Variable Interest Entities (Textuals)
Equity Method Investment Income		$ (1,400)		(1,400)		(3,400)
Ohio Valley Electric Corporation [Member]
Variable Interest Entities (Textuals)
AEP's Ownership In OVEC		43.47%
Approximate OVEC Generating Capacity (MWs) | MW		2,400
Intercompany Power Agreement End Date		2040
Outstanding Indebtedness		$ 1,100,000		1,100,000
Dry Lake Solar Project [Member]
Variable Interest Entities (Textuals)
Noncontrolling Interest in Variable Interest Entity				34,000
Dry Lake Solar Project [Member] | Generation and Marketing [Member]
Variable Interest Entities (Textuals)
Percentage of an Asset Acquired		75.00%
Dry Lake Solar Project [Member] | Variable Interest Entities [Member]
ASSETS
Current Assets				4,000
Net Property, Plant and Equipment				142,600
Other Noncurrent Assets				300
Total Assets				146,900
LIABILITIES AND EQUITY
Current Liabilities				1,000
Noncurrent Liabilities				700
Equity				145,200
Total Liabilities and Equity				146,900
Apple Blossom and Black Oak [Member]
Variable Interest Entities (Textuals)
Noncontrolling Interest in Variable Interest Entity				94,000
Apple Blossom and Black Oak [Member] | Variable Interest Entities [Member]
ASSETS
Current Assets				8,300
Net Property, Plant and Equipment				216,500
Other Noncurrent Assets				13,600
Total Assets				238,400
LIABILITIES AND EQUITY
Current Liabilities				4,500
Noncurrent Liabilities				5,400
Equity				228,500
Total Liabilities and Equity				238,400
Capital Contribution From Parent [Member] | Ohio Valley Electric Corporation [Member]
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures
As Reported on the Balance Sheet		$ 4,400		4,400
Maximum Exposure		4,400		4,400
Retained Earnings [Member]
LIABILITIES AND EQUITY
Equity		12,800,400		12,345,600		11,667,100	10,687,800
AEP's Ratio of OVEC Debt [Member] | Ohio Valley Electric Corporation [Member]
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures
As Reported on the Balance Sheet	[1]	0		0
Maximum Exposure	[1]	465,300		478,200
Total Investment [Member] | Ohio Valley Electric Corporation [Member]
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures
As Reported on the Balance Sheet		4,400		4,400
Maximum Exposure		$ 469,700		482,600
Great Plains Energy Inc. [Member] | Transource Energy [Member]
Variable Interest Entities (Textuals)
Equity and Voting Ownership Percentage		13.50%
Cleco Power, LLC [Member]
Variable Interest Entities (Textuals)
Percentage of VIE Sales of Lignite Produced		50.00%
AEP Transmission Co [Member]
ASSETS
Current Assets		$ 278,800		188,700
Net Property, Plant and Equipment		14,497,700		13,339,900
Other Noncurrent Assets		296,000		285,600
Total Assets		15,072,500		13,814,200
LIABILITIES AND EQUITY
Current Liabilities		1,286,100		1,368,000
Noncurrent Liabilities		7,453,100		6,573,200
Total Liabilities and Equity		15,072,500		13,814,200
Variable Interest Entities (Textuals)
Accounts Payable - Affiliated Companies for collected reclamation costs that have been billed to SWEPCo		274,700		427,800
AEP Transmission Co [Member] | Related Party
Variable Interest Entities (Textuals)
Accounts Payable - Affiliated Companies for collected reclamation costs that have been billed to SWEPCo		107,900		82,700
AEP Transmission Co [Member] | Unregulated Operation [Member]
ASSETS
Net Property, Plant and Equipment		300		300
AEP Transmission Co [Member] | Billings from AEP Service Corporation [Member]
Variable Interest Entities (Textuals)
Billings from VIE		269,900		286,600		267,100
AEP Transmission Co [Member] | Carrying Amount in AEP Service Corporation's Accounts Payable [Member]
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures
As Reported on the Balance Sheet		17,900		31,600
Maximum Exposure		17,900		31,600
Appalachian Power Co [Member]
ASSETS
Current Assets		1,059,000		1,259,600
Net Property, Plant and Equipment		12,931,500		12,379,200
Other Noncurrent Assets		1,721,400		1,583,400
Total Assets		15,711,900		15,222,200
LIABILITIES AND EQUITY
Current Liabilities		1,685,900		1,390,200
Noncurrent Liabilities		8,749,300		8,856,600
Equity		5,276,700		4,975,400		4,647,900	4,344,300
Total Liabilities and Equity		15,711,900		15,222,200
Variable Interest Entities (Textuals)
Securitization Bonds		147,000		173,300
Securitized Assets		133,400		159,600
Amount Of Power Purchased From OVEC		121,800		119,300		104,300
Accounts Payable - Affiliated Companies for collected reclamation costs that have been billed to SWEPCo		280,400		451,200
Appalachian Power Co [Member] | Unregulated Operation [Member]
ASSETS
Net Property, Plant and Equipment		32,900		29,400
Appalachian Power Co [Member] | Appalachian Consumer Rate Relief Funding [Member]
Variable Interest Entities (Textuals)
Securitized Assets		133,000		160,000
Appalachian Power Co [Member] | Appalachian Consumer Rate Relief Funding [Member] | Variable Interest Entities [Member]
ASSETS
Current Assets		13,300		13,500
Net Property, Plant and Equipment		0		0
Other Noncurrent Assets		138,200	[2]	164,600	[3]
Total Assets		151,500		178,100
LIABILITIES AND EQUITY
Current Liabilities		29,900		29,300
Noncurrent Liabilities		119,700		146,900
Equity		1,900		1,900
Total Liabilities and Equity		$ 151,500		178,100
Appalachian Power Co [Member] | Ohio Valley Electric Corporation [Member]
Variable Interest Entities (Textuals)
Power Participation Ratio		15.69%
Outstanding Indebtedness		$ 168,000		173,000
Appalachian Power Co [Member] | Billings from AEP Service Corporation [Member]
Variable Interest Entities (Textuals)
Billings from VIE		324,900		347,500		313,300
Appalachian Power Co [Member] | Carrying Amount in AEP Service Corporation's Accounts Payable [Member]
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures
As Reported on the Balance Sheet		21,100		41,500
Maximum Exposure		21,100		41,500
Appalachian Power Co [Member] | Retained Earnings [Member]
LIABILITIES AND EQUITY
Equity		3,185,500		2,891,100		2,534,400	2,248,000
Appalachian Power Co [Member] | Other Noncurrent Assets [Member] | Appalachian Consumer Rate Relief Funding [Member]
Variable Interest Entities (Textuals)
Intercompany Item Eliminated in Consolidation		2,000		2,000
Appalachian Power Co [Member] | Current Liabilities [Member] | Appalachian Consumer Rate Relief Funding [Member]
Variable Interest Entities (Textuals)
Securitization Bonds		27,000		26,000
Appalachian Power Co [Member] | Noncurrent Liabilities [Member] | Appalachian Consumer Rate Relief Funding [Member]
Variable Interest Entities (Textuals)
Securitization Bonds		120,000		147,000
Indiana Michigan Power Co [Member]
ASSETS
Current Assets		528,000		571,800
Net Property, Plant and Equipment		7,629,000		7,411,500
Other Noncurrent Assets		4,651,000		4,135,600
Total Assets		12,808,000		12,118,900
LIABILITIES AND EQUITY
Current Liabilities		830,200		1,197,100
Noncurrent Liabilities		8,837,600		7,913,500
Equity		3,140,200		3,008,300		2,784,700	2,749,200
Total Liabilities and Equity		12,808,000		12,118,900
Variable Interest Entities (Textuals)
Amount Of Power Purchased From OVEC		60,900		59,700		52,200
Accounts Payable - Affiliated Companies for collected reclamation costs that have been billed to SWEPCo		225,800		173,400
Indiana Michigan Power Co [Member] | Related Party
Variable Interest Entities (Textuals)
Accounts Payable - Affiliated Companies for collected reclamation costs that have been billed to SWEPCo		107,300		121,500
Indiana Michigan Power Co [Member] | Unregulated Operation [Member]
ASSETS
Net Property, Plant and Equipment		82,700		78,700
Indiana Michigan Power Co [Member] | DCC Fuel [Member]
Variable Interest Entities (Textuals)
Payments Made by I&M to DCC Fuel		$ 97,000		84,000		91,000
Capital Lease Term		54 months
Indiana Michigan Power Co [Member] | DCC Fuel [Member] | Variable Interest Entities [Member]
ASSETS
Current Assets		$ 81,900		90,200
Net Property, Plant and Equipment		153,800		179,100
Other Noncurrent Assets		81,700		94,000
Total Assets		317,400		363,300
LIABILITIES AND EQUITY
Current Liabilities		81,700		90,000
Noncurrent Liabilities		235,700		273,300
Equity		0		0
Total Liabilities and Equity		$ 317,400		363,300
Indiana Michigan Power Co [Member] | Ohio Valley Electric Corporation [Member]
Variable Interest Entities (Textuals)
Power Participation Ratio		7.85%
Outstanding Indebtedness		$ 84,000		86,000
Indiana Michigan Power Co [Member] | Billings from AEP Service Corporation [Member]
Variable Interest Entities (Textuals)
Billings from VIE		178,400		192,400		200,900
Indiana Michigan Power Co [Member] | Carrying Amount in AEP Service Corporation's Accounts Payable [Member]
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures
As Reported on the Balance Sheet		14,300		27,700
Maximum Exposure		14,300		27,700
Indiana Michigan Power Co [Member] | Billings from AEP Generating Company [Member]
Variable Interest Entities (Textuals)
Billings from VIE		181,000		242,000		218,000
Indiana Michigan Power Co [Member] | Carrying Amount in AEP Generating Company's Accounts Payable [Member]
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures
As Reported on the Balance Sheet		15,000		17,000
Indiana Michigan Power Co [Member] | Retained Earnings [Member]
LIABILITIES AND EQUITY
Equity		2,086,600		1,963,200		1,748,500	1,718,700
Ohio Power Co [Member]
ASSETS
Current Assets		377,800		414,400
Net Property, Plant and Equipment		9,299,900		8,609,300
Other Noncurrent Assets		1,166,000		979,400
Total Assets		10,843,700		10,003,100
LIABILITIES AND EQUITY
Current Liabilities		1,614,300		1,635,500
Noncurrent Liabilities		5,658,100		5,279,500
Equity		3,571,300		3,088,100		2,846,300	2,692,700
Total Liabilities and Equity		10,843,700		10,003,100
Variable Interest Entities (Textuals)
Amount Of Power Purchased From OVEC		154,700		151,800		133,000
Equity Method Investment Income		0		(600)		0
Accounts Payable - Affiliated Companies for collected reclamation costs that have been billed to SWEPCo		320,700		337,300
Ohio Power Co [Member] | Related Party
Variable Interest Entities (Textuals)
Accounts Payable - Affiliated Companies for collected reclamation costs that have been billed to SWEPCo		154,200		126,100
Ohio Power Co [Member] | Unregulated Operation [Member]
ASSETS
Net Property, Plant and Equipment		$ 9,700		9,800
Ohio Power Co [Member] | Ohio Valley Electric Corporation [Member]
Variable Interest Entities (Textuals)
AEP's Ownership In OVEC		4.30%
Power Participation Ratio		19.93%
Outstanding Indebtedness		$ 213,000		219,000
Ohio Power Co [Member] | Billings from AEP Service Corporation [Member]
Variable Interest Entities (Textuals)
Billings from VIE		269,500		272,500		234,900
Ohio Power Co [Member] | Carrying Amount in AEP Service Corporation's Accounts Payable [Member]
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures
As Reported on the Balance Sheet		19,000		31,100
Maximum Exposure		19,000		31,100
Ohio Power Co [Member] | Retained Earnings [Member]
LIABILITIES AND EQUITY
Equity		2,237,300		1,929,100		1,686,300	1,532,700
Public Service Co Of Oklahoma [Member]
ASSETS
Current Assets		469,500		491,500
Net Property, Plant and Equipment		6,112,300		5,626,500
Other Noncurrent Assets		753,100		847,900
Total Assets		7,334,900		6,965,900
LIABILITIES AND EQUITY
Current Liabilities		559,000		842,700
Noncurrent Liabilities		4,205,300		3,704,100
Equity		2,570,600		2,419,100		2,291,600	1,545,600
Total Liabilities and Equity		7,334,900		6,965,900
Variable Interest Entities (Textuals)
Accounts Payable - Affiliated Companies for collected reclamation costs that have been billed to SWEPCo		159,300		202,900
Public Service Co Of Oklahoma [Member] | Related Party
Variable Interest Entities (Textuals)
Accounts Payable - Affiliated Companies for collected reclamation costs that have been billed to SWEPCo		56,700		76,700
Public Service Co Of Oklahoma [Member] | Unregulated Operation [Member]
ASSETS
Net Property, Plant and Equipment		4,900		5,000
Public Service Co Of Oklahoma [Member] | Billings from AEP Service Corporation [Member]
Variable Interest Entities (Textuals)
Billings from VIE		138,600		142,300		123,700
Public Service Co Of Oklahoma [Member] | Carrying Amount in AEP Service Corporation's Accounts Payable [Member]
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures
As Reported on the Balance Sheet		10,600		17,700
Maximum Exposure		10,600		17,700
Public Service Co Of Oklahoma [Member] | Retained Earnings [Member]
LIABILITIES AND EQUITY
Equity		1,374,300		1,218,000		1,095,400	974,300
Southwestern Electric Power Co [Member]
ASSETS
Current Assets		541,300		812,200
Net Property, Plant and Equipment		8,558,400		8,262,200
Other Noncurrent Assets		1,457,900		1,304,400
Total Assets		10,557,600		10,378,800
LIABILITIES AND EQUITY
Current Liabilities		686,900		947,700
Noncurrent Liabilities		6,100,300		5,756,300
Equity		3,770,400		3,674,800		3,149,800	2,627,700
Total Liabilities and Equity		10,557,600		10,378,800
Variable Interest Entities (Textuals)
Equity Method Investment Income		(1,400)		(1,400)		(3,400)
Accounts Payable - Affiliated Companies for collected reclamation costs that have been billed to SWEPCo		198,900		213,100
Southwestern Electric Power Co [Member] | Unregulated Operation [Member]
ASSETS
Net Property, Plant and Equipment		23,900		9,300
Southwestern Electric Power Co [Member] | Sabine Mining Co [Member]
Variable Interest Entities (Textuals)
Billings from VIE		101,000		168,000		162,000
Guarantees Of Mine Reclamation Amount		155,000
Estimated Final Cost Mine Reclamation		144,000
Amount Collected Through Rider For Final Mine Closure And Reclamation Costs		$ 92,000
Reclamation Complete Date		2037
Amount Recorded In ARO For Final Mine Closure And Reclamation Costs		$ 134,000
Amount Recorded In Other Noncurrent Assets For Final Mine Closure And Reclamation Costs		76,000
Southwestern Electric Power Co [Member] | Sabine Mining Co [Member] | Related Party
Variable Interest Entities (Textuals)
Accounts Payable - Affiliated Companies for collected reclamation costs that have been billed to SWEPCo		34,000
Southwestern Electric Power Co [Member] | Sabine Mining Co [Member] | Variable Interest Entities [Member]
ASSETS
Current Assets		4,200		108,300
Net Property, Plant and Equipment		0		7,200
Other Noncurrent Assets		150,700		130,000
Total Assets		154,900		245,500
LIABILITIES AND EQUITY
Current Liabilities		19,900		25,400
Noncurrent Liabilities		134,800		219,400
Equity		200		700
Total Liabilities and Equity		$ 154,900		245,500
Southwestern Electric Power Co [Member] | Dolet Hills Lignite Co, LLC [Member]
Variable Interest Entities (Textuals)
Billings from VIE						47,000
Percentage of VIE Sales of Lignite Produced		50.00%
Percentage of DHLCs Debt Guaranteed by Each SWEPCo and CLECO		50.00%
Percentage of Management Fee Received by SWEPCo from DHLC		100.00%
Equity Method Investment Income		$ (1,400)		(1,400)		(3,400)
Dividends		1,000		25,000		0
Southwestern Electric Power Co [Member] | Billings from AEP Service Corporation [Member]
Variable Interest Entities (Textuals)
Billings from VIE		185,100		192,500		168,600
Southwestern Electric Power Co [Member] | Carrying Amount in AEP Service Corporation's Accounts Payable [Member]
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures
As Reported on the Balance Sheet		12,700		23,800
Maximum Exposure		12,700		23,800
Southwestern Electric Power Co [Member] | Capital Contribution From Parent [Member] | Dolet Hills Lignite Co, LLC [Member]
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures
As Reported on the Balance Sheet		7,600		7,600
Maximum Exposure		7,600		7,600
Southwestern Electric Power Co [Member] | Retained Earnings [Member]
LIABILITIES AND EQUITY
Equity		2,281,300		2,236,000		2,050,900	1,811,900
Southwestern Electric Power Co [Member] | Retained Earnings [Member] | Dolet Hills Lignite Co, LLC [Member]
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures
As Reported on the Balance Sheet		400		400
Maximum Exposure		400		400
Southwestern Electric Power Co [Member] | SWEPCo's Share of Obligations [Member] | Dolet Hills Lignite Co, LLC [Member]
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures
As Reported on the Balance Sheet		0		0
Maximum Exposure		19,200		36,800
Southwestern Electric Power Co [Member] | Total Investment [Member] | Dolet Hills Lignite Co, LLC [Member]
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures
As Reported on the Balance Sheet		8,000		8,000
Maximum Exposure		$ 27,200		44,800
AEP Generating Co [Member] | Rockport Generating Plant
Variable Interest Entities (Textuals)
Jointly Owned Utility Plant, Proportionate Ownership Share		50.00%
Transource Energy [Member]
Variable Interest Entities (Textuals)
Equity and Voting Ownership Percentage		86.50%
AEP Texas Inc. [Member]
ASSETS
Current Assets		$ 520,100		446,900
Net Property, Plant and Equipment		12,774,000		11,681,600
Other Noncurrent Assets		696,600		763,700
Total Assets		13,990,700		12,892,200
LIABILITIES AND EQUITY
Current Liabilities		749,400		1,043,800
Noncurrent Liabilities		8,445,200		7,944,100
Equity		4,796,100		3,904,300		3,594,200	3,206,000
Total Liabilities and Equity		13,990,700		12,892,200
Variable Interest Entities (Textuals)
Securitization Bonds		221,800		314,400
Securitized Assets		202,900		286,400
Accounts Payable - Affiliated Companies for collected reclamation costs that have been billed to SWEPCo		192,300		331,000
AEP Texas Inc. [Member] | Related Party
Variable Interest Entities (Textuals)
Accounts Payable - Affiliated Companies for collected reclamation costs that have been billed to SWEPCo		27,700		34,700
AEP Texas Inc. [Member] | Unregulated Operation [Member]
ASSETS
Net Property, Plant and Equipment		1,800		1,200
AEP Texas Inc. [Member] | AEP Texas Central Transition Funding Co [Member]
Variable Interest Entities (Textuals)
Securitized Assets		64,000		125,000
AEP Texas Inc. [Member] | AEP Texas Central Transition Funding Co [Member] | Variable Interest Entities [Member]
ASSETS
Current Assets		25,500		27,000
Net Property, Plant and Equipment		0		0
Other Noncurrent Assets		71,400	[4]	140,900	[5]
Total Assets		96,900		167,900
LIABILITIES AND EQUITY
Current Liabilities		75,500		73,200
Noncurrent Liabilities		17,000		90,400
Equity		4,400		4,300
Total Liabilities and Equity		96,900		167,900
AEP Texas Inc. [Member] | Restoration Funding [Member]
Variable Interest Entities (Textuals)
Securitized Assets		139,000		161,000
AEP Texas Inc. [Member] | Restoration Funding [Member] | Variable Interest Entities [Member]
ASSETS
Current Assets		27,500		21,100
Net Property, Plant and Equipment		0		0
Other Noncurrent Assets		145,600	[6]	168,800	[7]
Total Assets		173,100		189,900
LIABILITIES AND EQUITY
Current Liabilities		36,800		31,300
Noncurrent Liabilities		135,100		157,400
Equity		1,200		1,200
Total Liabilities and Equity		173,100		189,900
AEP Texas Inc. [Member] | Billings from AEP Service Corporation [Member]
Variable Interest Entities (Textuals)
Billings from VIE		228,500		236,800		206,900
AEP Texas Inc. [Member] | Carrying Amount in AEP Service Corporation's Accounts Payable [Member]
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures
As Reported on the Balance Sheet		15,100		27,800
Maximum Exposure		15,100		27,800
AEP Texas Inc. [Member] | Retained Earnings [Member]
LIABILITIES AND EQUITY
Equity		2,725,100		2,354,700		2,046,800	$ 1,757,000
AEP Texas Inc. [Member] | Other Noncurrent Assets [Member] | AEP Texas Central Transition Funding Co [Member]
Variable Interest Entities (Textuals)
Intercompany Item Eliminated in Consolidation		8,000		16,000
AEP Texas Inc. [Member] | Other Noncurrent Assets [Member] | Restoration Funding [Member]
Variable Interest Entities (Textuals)
Intercompany Item Eliminated in Consolidation		6,000		7,000
AEP Texas Inc. [Member] | Current Liabilities [Member] | AEP Texas Central Transition Funding Co [Member]
Variable Interest Entities (Textuals)
Securitization Bonds		72,000		70,000
AEP Texas Inc. [Member] | Current Liabilities [Member] | Restoration Funding [Member]
Variable Interest Entities (Textuals)
Securitization Bonds		24,000		24,000
AEP Texas Inc. [Member] | Noncurrent Liabilities [Member] | AEP Texas Central Transition Funding Co [Member]
Variable Interest Entities (Textuals)
Securitization Bonds				71,000
AEP Texas Inc. [Member] | Noncurrent Liabilities [Member] | Restoration Funding [Member]
Variable Interest Entities (Textuals)
Securitization Bonds		$ 126,000		150,000
Parent Company [Member] | Ohio Valley Electric Corporation [Member]
Variable Interest Entities (Textuals)
AEP's Ownership In OVEC		39.17%
Joint Venture Wind Farms [Member]
Variable Interest Entities (Textuals)
Equity Method Investments				247,000
Equity Method Investment Income		$ (278)		(194,000)		(12,000)
Equity Method Investment, Difference Between Carrying Amount and Underlying Equity				62,000
Berkshire Hathaway [Member]
Variable Interest Entities (Textuals)
Equity Method Investment, Ownership Percentage		50.00%
AEP Transmission Holdco [Member]
Variable Interest Entities (Textuals)
Equity Method Investment, Ownership Percentage		50.00%
BP Wind Energy [Member] | Generation and Marketing [Member]
Variable Interest Entities (Textuals)
Equity Method Investment, Ownership Percentage		50.00%
ETT [Member]
Variable Interest Entities (Textuals)
Equity Method Investments		$ 811,000		762,000
Equity Method Investment Income		$ 74,000		$ 74,000		$ 66,000

[1] Based on the Registrants’ power participation ratios, APCo, I&M and OPCo’s share of OVEC debt was $168 million, $84 million and $213 million as of December 31, 2023, respectively and $173 million, $86 million and $219 million as of December 31, 2022, respectively.

[2] Includes an intercompany item eliminated in consolidation of $2 million.

[3] Includes an intercompany item eliminated in consolidation of $2 million.

[4] Includes an intercompany item eliminated in consolidation of $8 million.

[5] Includes an intercompany item eliminated in consolidation of $16 million.

[6] Includes an intercompany item eliminated in consolidation of $6 million.

[7] Includes an intercompany item eliminated in consolidation of $7 million.