Financing Activities (Details) - USD ($)		1 Months Ended	3 Months Ended
		Apr. 28, 2022	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Long-term Debt
Senior Unsecured Notes			$ 27,454,600,000		$ 27,497,300,000
Pollution Control Bonds			1,804,800,000		1,804,500,000
Notes Payable			186,400,000		211,300,000
Securitization Bonds			579,600,000		603,500,000
Spent Nuclear Fuel Obligation	[1]		281,400,000		281,300,000
Junior Subordinated Notes	[2]		2,373,400,000		2,373,000,000
Other Long-term Debt			1,183,900,000		683,600,000
Total Long-term Debt Outstanding	[3]		33,864,100,000		33,454,500,000
Long-term Debt Due Within One Year	[4]		3,008,400,000		2,153,800,000
Long-term Debt	[5]		30,855,700,000		31,300,700,000
Liabilities Held for Sale			1,873,700,000		1,880,900,000
Long-term Debt and Other Securities Issued, Retired and Principal Payments Made
Proceeds from Issuance of Debt	[6]		501,000,000.0
Repayments of Long-term Debt			51,000,000.0	$ 650,700,000
Short-term Debt:
Securitized Debt for Receivables	[7]		750,000,000.0		750,000,000.0
Commercial Paper			1,880,300,000		1,364,000,000
Total Short-term Debt			$ 3,380,300,000		$ 2,614,000,000
Securitized Debt for Receivables	[7],[8]		0.31%		0.19%
Comparative Accounts Receivable Information
Effective Interest Rates on Securitization of Accounts Receivable			0.31%	0.20%
Net Uncollectible Accounts Receivable Written Off			$ 7,400,000	$ 9,300,000
Customer Accounts Receivable Managed Portfolio
Accounts Receivable Retained Interest and Pledged as Collateral Less Uncollectible Accounts			948,400,000		$ 995,200,000
Total Principal Outstanding			750,000,000.0		750,000,000.0
Delinquent Securitized Accounts Receivable			50,100,000		57,900,000
Bad Debt Reserves Related to Securitization, Sale of Accounts Receivable			41,800,000		42,800,000
Unbilled Receivables Related to Securitization, Sale of Accounts Receivable			237,100,000		307,100,000
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold			4,592,600,000	4,281,100,000
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			$ 809,500,000	184,600,000
Trust Fund Assets One Time Fee Obligation for Nuclear Fuel Disposition			$ 328,000,000		329,000,000
Maximum Percentage Debt to Capitalization			67.50%
Total Commitment from Bank Conduits to Finance Receivables			$ 750,000,000
Forward Equity Purchase Contract Included in Current and Noncurrent Liabilities as of September 30,			16,700,000	19,100,000
Commitment from Bank Conduits to Finance Receivables			125,000,000
Commitment from Bank Conduits to Finance Receivables Two			625,000,000
Assets Held for Sale			$ 2,972,600,000		$ 2,919,700,000
2020 Equity Units [Member]
Financing Activities (Textuals)
Equity Units Issued			17,000,000
Per Unit Conversion for Equity Units			$ 50
Net Equity Units Issuance Proceeds			$ 833,000,000
Corporate unit ownership share of an equity unit			5.00%
Principal Amounts of Junior Subordinated Debt			$ 1,000
Forward Equity Purchase Contract Date			2023
Equity Units Annual Distribution Rate			6.125%
Forward Equity Contract Payment Rate			4.825%
Maximum Shares Issued Under Equity Units Conversion			10,205,100
2019 Equity Units [Member]
Financing Activities (Textuals)
Stock Issued During Period, Shares, New Issues			8,970,920
Issuance of Common Stock			$ 805,000,000
Equity Units Issued			16,100,000
Per Unit Conversion for Equity Units			$ 50
Net Equity Units Issuance Proceeds			$ 785,000,000
Corporate unit ownership share of an equity unit			5.00%
Principal Amounts of Junior Subordinated Debt			$ 1,000
Forward Equity Purchase Contract Date			2022
Kentucky Transmission Company
Financing Activities (Textuals)
Assets Held for Sale			$ 2,000,000
Junior Subordinated Debt [Member]
Long-term Debt and Other Securities Issued, Retired and Principal Payments Made
Interest Rate (Percentage)			2.031%
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%
Junior Subordinated Debt [Member] | 2019 Equity Units [Member]
Long-term Debt and Other Securities Issued, Retired and Principal Payments Made
Proceeds from Issuance of Debt			$ 805,000,000
Interest Rate (Percentage)			3.40%
Commercial Paper [Member]
Short-term Debt:
Weighted Average Interest Rate	[8]		0.97%		0.34%
Term Loan [Member]
Short-term Debt:
Weighted Average Interest Rate	[8],[9]		1.11%		0.81%
Term Loan	[9]		$ 500,000,000.0		$ 500,000,000.0
Term Loan 2 [Member]
Short-term Debt:
Weighted Average Interest Rate	[8]		0.97%		0.00%
Term Loan			$ 250,000,000.0		$ 0
AEP Texas Inc. [Member]
Long-term Debt
Total Long-term Debt Outstanding			5,170,600,000		5,180,800,000
Long-term Debt Due Within One Year			841,300,000		716,000,000.0
Long-term Debt			4,329,300,000		4,464,800,000
Long-term Debt and Other Securities Issued, Retired and Principal Payments Made
Repayments of Long-term Debt			$ 11,400,000	$ 11,200,000
Financing Activities (Textuals)
Maximum Percentage Debt to Capitalization			67.50%
AEP Texas Inc. [Member] | Utility [Member]
Maximum Interest Rate			1.00%	0.40%
Minimum Interest Rate			0.10%	0.25%
Money Pool Participants Money Pool Activity And Authorized Borrowing Limits
Maximum Borrowings from Money Pool			$ 264,700,000
Maximum Loans to Money Pool			0
Average Borrowings from Money Pool			152,800,000
Average Loans to Money Pool			0
Net Loans (Borrowings) to/from Money Pool			(262,200,000)
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			0.70%	0.31%
Average Interest Rate For Funds Loaned			0.00%	0.00%
AEP Texas Inc. [Member] | Nonutility [Member]
Money Pool Participants Money Pool Activity And Authorized Borrowing Limits
Maximum Loans to Money Pool			$ 6,900,000
Average Loans to Money Pool			6,800,000
Net Loans (Borrowings) to/from Money Pool			$ 6,800,000
Maximum and Minimum Interest Rates
Maximum Interest Rate For Funds Loaned			1.00%	0.40%
Minimum Interest Rate for Funds Loaned			0.46%	0.25%
Average Interest Rates for Funds Borrowed From and Loaned to Money Pool
Average Interest Rate For Funds Loaned			0.62%	0.30%
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			$ 11,400,000
Due Date			2025
Interest Rate (Percentage)			2.06%
AEP Transmission Co [Member]
Long-term Debt
Total Long-term Debt Outstanding			$ 4,344,500,000		4,343,900,000
Long-term Debt Due Within One Year			104,000,000.0		104,000,000.0
Long-term Debt			4,240,500,000		4,239,900,000
Liabilities Held for Sale			27,600,000		27,600,000
Financing Activities (Textuals)
Sub-Limit of Secured Debt			$ 50,000,000
Maximum Percentage of Consolidated Tangible Net Assets			10.00%
Tangible Capital to Tangible Assets			2.90%
Maximum Percentage Debt to Capitalization			67.50%
Assets Held for Sale			$ 169,900,000		167,900,000
AEP Transmission Co [Member] | Utility [Member]
Maximum Interest Rate			1.00%	0.40%
Minimum Interest Rate			0.10%	0.25%
Money Pool Participants Money Pool Activity And Authorized Borrowing Limits
Maximum Borrowings from Money Pool			$ 388,400,000
Maximum Loans to Money Pool			14,500,000
Average Borrowings from Money Pool			253,100,000
Average Loans to Money Pool			3,200,000
Net Loans (Borrowings) to/from Money Pool	[10]		(282,100,000)
Authorized Short Term Borrowing Limit	[11]		$ 820,000,000.0
Average Interest Rates for Funds Borrowed From and Loaned to Money Pool
Average Interest Rate For Funds Borrowed			0.66%	0.31%
Average Interest Rate For Funds Loaned			0.60%	0.28%
AEP Transmission Co [Member] | Direct Borrowing [Member]
Money Pool Participants Money Pool Activity And Authorized Borrowing Limits
Maximum Borrowings from Money Pool			$ 37,000,000.0
Maximum Loans to Money Pool			141,800,000
Average Borrowings from Money Pool			4,300,000
Average Loans to Money Pool			72,700,000
Borrowings from Parent			37,000,000.0
Loans to Parent			0
Authorized Short Term Borrowing Limit	[12]		$ 50,000,000.0
Maximum and Minimum Interest Rates
Maximum Interest Rate for Funds Borrowed			1.00%	0.86%
Minimum Interest Rate For Funds Borrowed			0.46%	0.25%
Maximum Interest Rate For Funds Loaned			1.00%	0.86%
Minimum Interest Rate for Funds Loaned			0.46%	0.25%
Average Interest Rates for Funds Borrowed From and Loaned to Money Pool
Average Interest Rate For Funds Borrowed			0.66%	0.31%
Average Interest Rate For Funds Loaned			0.60%	0.31%
Appalachian Power Co [Member]
Long-term Debt
Total Long-term Debt Outstanding			$ 4,927,200,000		4,938,900,000
Long-term Debt Due Within One Year			480,900,000		480,700,000
Long-term Debt			4,446,300,000		4,458,200,000
Long-term Debt and Other Securities Issued, Retired and Principal Payments Made
Repayments of Long-term Debt			12,700,000	$ 362,500,000
Accounts Receivable and Accrued Unbilled Revenues
Accounts Receivable and Accrued Unbilled Revenues			148,600,000		153,100,000
Proceeds from Sale of Receivables
Proceeds from Sale of Receivables to AEP Credit			$ 415,500,000	362,400,000
Financing Activities (Textuals)
Maximum Percentage Debt to Capitalization			67.50%
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			$ 1,300,000	$ 1,200,000
Appalachian Power Co [Member] | Utility [Member]
Maximum Interest Rate			1.00%	0.40%
Minimum Interest Rate			0.10%	0.25%
Money Pool Participants Money Pool Activity And Authorized Borrowing Limits
Maximum Borrowings from Money Pool			$ 227,900,000
Maximum Loans to Money Pool			20,800,000
Average Borrowings from Money Pool			114,600,000
Average Loans to Money Pool			20,000,000.0
Net Loans (Borrowings) to/from Money Pool			(15,800,000)
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			0.55%	0.28%
Average Interest Rate For Funds Loaned			0.62%	0.36%
Appalachian Power Co [Member] | Securitization Bonds [Member]
Long-term Debt and Other Securities Issued, Retired and Principal Payments Made
Repayments of Long-term Debt			$ 12,700,000
Due Date			2023
Interest Rate (Percentage)			2.01%
Indiana Michigan Power Co [Member]
Long-term Debt
Total Long-term Debt Outstanding			$ 3,171,700,000		3,195,000,000
Long-term Debt Due Within One Year			304,000,000.0		67,000,000.0
Long-term Debt			2,867,700,000		3,128,000,000
Long-term Debt and Other Securities Issued, Retired and Principal Payments Made
Repayments of Long-term Debt			23,800,000	$ 24,100,000
Accounts Receivable and Accrued Unbilled Revenues
Accounts Receivable and Accrued Unbilled Revenues			178,000,000.0		156,900,000
Proceeds from Sale of Receivables
Proceeds from Sale of Receivables to AEP Credit			513,400,000	478,800,000
Financing Activities (Textuals)
Trust Fund Assets One Time Fee Obligation for Nuclear Fuel Disposition			$ 328,000,000		329,000,000
Maximum Percentage Debt to Capitalization			67.50%
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			$ 1,700,000	$ 1,600,000
Indiana Michigan Power Co [Member] | Utility [Member]
Maximum Interest Rate			1.00%	0.40%
Minimum Interest Rate			0.10%	0.25%
Money Pool Participants Money Pool Activity And Authorized Borrowing Limits
Maximum Borrowings from Money Pool			$ 159,100,000
Maximum Loans to Money Pool			21,500,000
Average Borrowings from Money Pool			102,200,000
Average Loans to Money Pool			21,500,000
Net Loans (Borrowings) to/from Money Pool			(52,100,000)
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			0.63%	0.31%
Average Interest Rate For Funds Loaned			0.62%	0.30%
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			$ 3,500,000
Due Date			2024
Interest Rate (Variable)			Variable
Indiana Michigan Power Co [Member] | Notes Payable, Other Payable Three [Member] | Subsequent Event [Member]
Long-term Debt and Other Securities Issued, Retired and Principal Payments Made
Repayments of Long-term Debt		$ 5,000,000
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			$ 1,300,000
Due Date			2022
Interest Rate (Variable)			Variable
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			$ 1,100,000
Due Date			2022
Interest Rate (Variable)			Variable
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			$ 4,600,000
Due Date			2023
Interest Rate (Variable)			Variable
Indiana Michigan 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			$ 6,500,000
Due Date			2025
Interest Rate (Variable)			Variable
Indiana Michigan 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			$ 6,200,000
Due Date			2025
Interest Rate (Percentage)			0.93%
Indiana Michigan 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			2025
Interest Rate (Percentage)			6.00%
Ohio Power Co [Member]
Long-term Debt
Total Long-term Debt Outstanding			$ 2,969,000,000		2,968,500,000
Long-term Debt Due Within One Year			100,000		100,000
Long-term Debt			2,968,900,000		2,968,400,000
Accounts Receivable and Accrued Unbilled Revenues
Accounts Receivable and Accrued Unbilled Revenues			402,000,000.0		392,700,000
Proceeds from Sale of Receivables
Proceeds from Sale of Receivables to AEP Credit			716,600,000	$ 601,300,000
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	$ 1,300,000
Ohio Power Co [Member] | Utility [Member]
Maximum Interest Rate			1.00%	0.40%
Minimum Interest Rate			0.10%	0.25%
Money Pool Participants Money Pool Activity And Authorized Borrowing Limits
Maximum Borrowings from Money Pool			$ 112,200,000
Maximum Loans to Money Pool			92,100,000
Average Borrowings from Money Pool			57,400,000
Average Loans to Money Pool			41,500,000
Net Loans (Borrowings) to/from Money Pool			(55,700,000)
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			0.77%	0.29%
Average Interest Rate For Funds Loaned			0.48%	0.29%
Public Service Co Of Oklahoma [Member]
Long-term Debt
Total Long-term Debt Outstanding			$ 2,413,600,000		1,913,500,000
Long-term Debt Due Within One Year			625,500,000		125,500,000
Long-term Debt			1,788,100,000		1,788,000,000
Long-term Debt and Other Securities Issued, Retired and Principal Payments Made
Repayments of Long-term Debt			100,000	$ 250,100,000
Accounts Receivable and Accrued Unbilled Revenues
Accounts Receivable and Accrued Unbilled Revenues			109,000,000.0		114,500,000
Proceeds from Sale of Receivables
Proceeds from Sale of Receivables to AEP Credit			$ 363,400,000	284,900,000
Financing Activities (Textuals)
Maximum Percentage Debt to Capitalization			67.50%
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			$ 900,000	$ 700,000
Public Service Co Of Oklahoma [Member] | Utility [Member]
Maximum Interest Rate			1.00%	0.40%
Minimum Interest Rate			0.10%	0.25%
Money Pool Participants Money Pool Activity And Authorized Borrowing Limits
Maximum Borrowings from Money Pool			$ 211,800,000
Maximum Loans to Money Pool			432,500,000
Average Borrowings from Money Pool			94,800,000
Average Loans to Money Pool			403,600,000
Net Loans (Borrowings) to/from Money Pool			(211,800,000)
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			0.69%	0.33%
Average Interest Rate For Funds Loaned			0.65%	0.28%
Public Service Co Of Oklahoma [Member] | Other Long Term Debt Two [Member]
Long-term Debt and Other Securities Issued, Retired and Principal Payments Made
Repayments of Long-term Debt			$ 100,000
Due Date			2027
Interest Rate (Variable)			3.00
Public Service Co Of Oklahoma [Member] | OtherLongTermDebtThree
Long-term Debt and Other Securities Issued, Retired and Principal Payments Made
Proceeds from Issuance of Debt	[6]		$ 500,000,000.0
Due Date			2022
Interest Rate (Variable)			Variable
Southwestern Electric Power Co [Member]
Long-term Debt
Total Long-term Debt Outstanding			$ 3,394,100,000		3,395,200,000
Long-term Debt Due Within One Year			6,200,000		6,200,000
Long-term Debt			3,387,900,000		3,389,000,000
Long-term Debt and Other Securities Issued, Retired and Principal Payments Made
Repayments of Long-term Debt			1,600,000	$ 1,600,000
Accounts Receivable and Accrued Unbilled Revenues
Accounts Receivable and Accrued Unbilled Revenues			139,900,000		153,000,000.0
Proceeds from Sale of Receivables
Proceeds from Sale of Receivables to AEP Credit			$ 394,500,000	384,400,000
Financing Activities (Textuals)
Maximum Percentage Debt to Capitalization			67.50%
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			$ 1,300,000	$ 1,500,000
Southwestern Electric Power Co [Member] | Utility [Member]
Maximum Interest Rate			1.00%	0.40%
Minimum Interest Rate			0.10%	0.25%
Money Pool Participants Money Pool Activity And Authorized Borrowing Limits
Maximum Borrowings from Money Pool			$ 215,600,000
Maximum Loans to Money Pool			156,600,000
Average Borrowings from Money Pool			201,900,000
Average Loans to Money Pool			109,700,000
Net Loans (Borrowings) to/from Money Pool			(202,900,000)
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			0.98%	0.28%
Average Interest Rate For Funds Loaned			0.55%	0.38%
Southwestern Electric Power Co [Member] | Nonutility [Member]
Money Pool Participants Money Pool Activity And Authorized Borrowing Limits
Maximum Loans to Money Pool			$ 2,100,000
Average Loans to Money Pool			2,100,000
Net Loans (Borrowings) to/from Money Pool			$ 2,100,000
Maximum and Minimum Interest Rates
Maximum Interest Rate For Funds Loaned			1.00%	0.40%
Minimum Interest Rate for Funds Loaned			0.46%	0.25%
Average Interest Rates for Funds Borrowed From and Loaned to Money Pool
Average Interest Rate For Funds Loaned			0.62%	0.30%
Southwestern Electric 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			$ 1,600,000
Due Date			2032
Interest Rate (Percentage)			4.58%
Transource Energy [Member] | Other Long Term Debt [Member]
Long-term Debt and Other Securities Issued, Retired and Principal Payments Made
Proceeds from Issuance of Debt	[6]		$ 1,000,000.0
Due Date			2023
Interest Rate (Variable)			Variable
Transource Energy [Member] | Senior Unsecured Notes [Member]
Long-term Debt and Other Securities Issued, Retired and Principal Payments Made
Repayments of Long-term Debt			$ 1,400,000
Due Date			2050
Interest Rate (Percentage)			2.75%
Kentucky Power Co [Member]
Financing Activities (Textuals)
Liabilities Held for Sale			$ 19,000,000		18,000,000
Kentucky Power Co [Member] | Total Long-Term Debt Due Within One Year
Long-term Debt
Liabilities Held for Sale			200,000,000		200,000,000
Kentucky Power Co [Member] | Total Long-Term Debt
Long-term Debt
Liabilities Held for Sale			$ 903,000,000		$ 903,000,000
Wheeling Power Company | Pollution Control Bond [Member] | Subsequent Event [Member]
Long-term Debt and Other Securities Issued, Retired and Principal Payments Made
Proceeds from Issuance of Debt		65,000,000
Repayments of Long-term Debt		$ 65,000,000
Maximum [Member] | 2020 Equity Units [Member]
Financing Activities (Textuals)
AEP Share Price for Equity Unit Conversion			$ 99.95
Shares Per Equity Unit			0.6003
Minimum [Member] | 2020 Equity Units [Member]
Financing Activities (Textuals)
AEP Share Price for Equity Unit Conversion			$ 83.29
Shares Per Equity Unit			0.5003
Retained Earnings [Member]
Financing Activities (Textuals)
Forward Equity Purchase Contract Included in Current and Noncurrent Liabilities as of September 30,			$ 1,500,000	$ 600,000
Additional Paid-in Capital [Member]
Financing Activities (Textuals)
Forward Equity Purchase Contract Included in Current and Noncurrent Liabilities as of September 30,			15,200,000	$ 21,900,000
Additional Paid-in Capital [Member] | 2020 Equity Units [Member]
Financing Activities (Textuals)
Forward Equity Purchase Contract Included in Current and Noncurrent Liabilities as of September 30,			$ 121,000,000

[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 $328 million and $329 million as of March 31, 2022 and December 31, 2021, 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] The book value amounts exclude Long-term Debt of $1.1 billion and $1.1 billion as of March 31, 2022 and December 31, 2021, respectively, classified as Liabilities Held for Sale on the balance sheets. See “Disposition of KPCo and KTCo” section of Note 6 for additional information.

[4] Amount excludes $200 million and $200 million as of March 31, 2022 and December 31, 2021, respectively, of Long-term Debt Due Within One Year classified as Liabilities Held for Sale on the balance sheet. See “Disposition of KPCo and KTCo” section of Note 6 for additional information.

[5] Amount excludes $903 million and $903 million as of March 31, 2022 and December 31, 2021, respectively, of Long-term Debt classified as Liabilities Held for Sale on the balance sheet. See “Disposition of KPCo and KTCo” section of Note 6 for additional information.

[6] 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.

[7] Amount of securitized debt for receivables as accounted for under the “Transfers and Servicing” accounting guidance.

[8] Weighted-average rate.

[9] In March 2022, AEP extended the maturity date of the original 364-Day Term Loan to August 2022.

[10] (a)    Amount excludes $2 million of Advances to Affiliates classified as Assets Held for Sale on the AEPTCo balance sheet. See “Dispositions of KPCo and KTCo” section of Note 6 for additional information

[11] (b)    Amount represents the combined authorized short-term borrowing limit the State Transcos have from FERC or state regulatory commissions.

[12] Amount represents the combined authorized short-term borrowing limit the State Transcos have from FERC or state regulatory commissions.