Financing Activities (Details) - USD ($)		1 Months Ended	3 Months Ended
		Apr. 25, 2019	Mar. 31, 2019		Mar. 31, 2018		Dec. 31, 2018
Long-term Debt
Senior Unsecured Notes			$ 19,411,600,000				$ 18,903,300,000
Pollution Control Bonds			1,590,000,000.0				1,643,800,000
Notes Payable			177,000,000.0				204,700,000
Securitization Bonds			973,000,000.0				1,111,400,000
Spent Nuclear Fuel Obligation	[1]		275,300,000				273,600,000
Junior Subordinated Notes	[2]		785,000,000.0				0
Other Long-term Debt			1,214,800,000				1,209,900,000
Total Long-term Debt Outstanding			24,426,700,000				23,346,700,000
Long-term Debt Due Within One Year			1,528,500,000				1,698,500,000
Long-term Debt			22,898,200,000				21,648,200,000
Long-term Debt and Other Securities Issued, Retired and Principal Payments Made
Issuances	[3]		1,311,300,000
Retirements and Principal Payments			220,600,000		$ 544,000,000.0
Short-term Debt:
Securitized Debt for Receivables	[4]		750,000,000.0				750,000,000.0
Commercial Paper			1,108,000,000.0				1,160,000,000.0
Total Short-term Debt			$ 1,858,000,000.0				$ 1,910,000,000.0
Securitized Debt for Receivables	[4],[5]		2.71%				2.16%
Comparative Accounts Receivable Information
Effective Interest Rates on Securitization of Accounts Receivable			2.71%		1.74%
Net Uncollectible Accounts Receivable Written Off			$ 6,400,000		$ 4,200,000
Customer Accounts Receivable Managed Portfolio
Accounts Receivable Retained Interest and Pledged as Collateral Less Uncollectible Accounts			941,400,000				$ 972,500,000
Total Principal Outstanding			750,000,000.0				750,000,000.0
Delinquent Securitized Accounts Receivable			52,700,000				50,300,000
Bad Debt Reserves Related to Securitization of Accounts Receivable			29,100,000				27,500,000
Unbilled Receivables Related to Securitization of Accounts Receivable			230,300,000				281,400,000
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold			4,056,800,000		4,048,300,000
Financing Activities (Textuals)
Trust Fund Assets One Time Fee Obligation for Nuclear Fuel Disposition			318,000,000				317,000,000
Reacquired Pollution Controls Bonds Held by Trustees			$ 574,000,000
Equity Units Issued			16,100,000
Per unit conversion for equity units			$ 50
Net Equity Units Proceeds			785,000,000
Principal Amounts Of Junior Subordinated Debt			$ 1,000
Equity Units Annual Distribution Rate			6.125%
Forward Equity Contract Payment Rate			2.725%
Stockholders' Equity, Other			$ (55,600,000)		16,900,000
Maximum Shares Issued Under Equity Units			9,701,860
Maximum Percentage Debt to Capitalization			67.50%
Total Commitment from Bank Conduits to Finance Receivables			$ 750,000,000
Junior Subordinated Notes [Member]
Long-term Debt and Other Securities Issued, Retired and Principal Payments Made
Issuances	[3],[6]		$ 805,000,000.0
Debt Instrument, Interest Rate, Stated Percentage	[6]		3.40%
Due Date	[6]		2024
AEP Texas Inc. [Member]
Long-term Debt
Total Long-term Debt Outstanding			$ 3,778,300,000				3,881,300,000
Long-term Debt Due Within One Year			508,600,000				501,100,000
Long-term Debt			3,269,700,000				3,380,200,000
Long-term Debt and Other Securities Issued, Retired and Principal Payments Made
Retirements and Principal Payments			103,500,000		96,500,000
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold			$ 351,800,000		$ 354,100,000
Financing Activities (Textuals)
Maximum Percentage Debt to Capitalization			67.50%
AEP Texas Inc. [Member] | Utility [Member]
Money Pool Participants Money Pool Activity And Authorized Borrowing Limits
Maximum Borrowings from Money Pool			$ 379,900,000
Maximum Loans to Money Pool			0
Average Borrowings from Money Pool			301,900,000
Average Loans to Money Pool			0
Net Loans (Borrowings) to/from Utility Money Pool			(271,200,000)
Authorized Short Term Borrowing Limit			$ 500,000,000.0
Maximum and Minimum Interest Rates
Maximum Interest Rate			3.02%		2.42%
Minimum Interest Rate			2.73%		1.83%
Average Interest Rates for Funds Borrowed From and Loaned to Money Pool
Average Interest Rate For Funds Borrowed			2.86%		2.07%
Average Interest Rate For Funds Loaned			0.00%		1.90%
AEP Texas Inc. [Member] | Nonutility [Member]
Money Pool Participants Money Pool Activity And Authorized Borrowing Limits
Maximum Loans to Money Pool			$ 8,000,000.0
Average Loans to Money Pool			7,700,000
Net Loans (Borrowings) to/from Utility Money Pool			$ 7,700,000
Maximum and Minimum Interest Rates
Maximum Interest Rate For Funds Loaned			3.02%		2.42%
Minimum Interest Rate for Funds Loaned			2.73%		1.83%
Average Interest Rates for Funds Borrowed From and Loaned to Money Pool
Average Interest Rate For Funds Loaned			2.87%		2.00%
AEP Texas Inc. [Member] | Securitization Bonds [Member]
Long-term Debt and Other Securities Issued, Retired and Principal Payments Made
Retirements and Principal Payments			$ 103,500,000
Debt Instrument, Interest Rate, Stated Percentage			5.31%
Due Date			2020
AEP Transmission Co [Member]
Long-term Debt
Total Long-term Debt Outstanding			$ 2,823,400,000				2,823,000,000.0
Long-term Debt Due Within One Year			85,000,000.0				85,000,000.0
Long-term Debt			2,738,400,000				2,738,000,000.0
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold			245,200,000		$ 187,000,000.0	[7]
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			3.00%
Maximum Percentage Debt to Capitalization			67.50%
AEP Transmission Co [Member] | Utility [Member]
Money Pool Participants Money Pool Activity And Authorized Borrowing Limits
Maximum Borrowings from Money Pool			$ 279,000,000.0
Maximum Loans to Money Pool			80,000,000.0
Average Borrowings from Money Pool			165,300,000
Average Loans to Money Pool			32,200,000
Net Loans (Borrowings) to/from Utility Money Pool			(191,100,000)
Authorized Short Term Borrowing Limit	[8]		$ 795,000,000.0
Maximum and Minimum Interest Rates
Maximum Interest Rate			3.02%		2.42%
Minimum Interest Rate			2.73%		1.83%
Average Interest Rates for Funds Borrowed From and Loaned to Money Pool
Average Interest Rate For Funds Borrowed			2.83%		2.06%
Average Interest Rate For Funds Loaned			2.90%		1.92%
AEP Transmission Co [Member] | Direct Borrowing [Member]
Money Pool Participants Money Pool Activity And Authorized Borrowing Limits
Maximum Borrowings from Money Pool			$ 1,300,000
Maximum Loans to Money Pool			117,600,000
Average Borrowings from Money Pool			1,200,000
Average Loans to Money Pool			61,800,000
Borrowings from Parent			1,200,000
Loans to Parent			42,700,000
Authorized Short Term Borrowing Limit	[9]		$ 75,000,000.0
Maximum and Minimum Interest Rates
Maximum Interest Rate for Funds Borrowed			3.02%		2.42%
Minimum Interest Rate For Funds Borrowed			2.73%		1.83%
Maximum Interest Rate For Funds Loaned			3.02%		2.42%
Minimum Interest Rate for Funds Loaned			2.73%		1.83%
Average Interest Rates for Funds Borrowed From and Loaned to Money Pool
Average Interest Rate For Funds Borrowed			2.87%		2.00%
Average Interest Rate For Funds Loaned			2.86%		2.02%
Appalachian Power Co [Member]
Long-term Debt
Total Long-term Debt Outstanding			$ 4,444,000,000.0				4,062,600,000
Long-term Debt Due Within One Year			345,000,000.0				430,700,000
Long-term Debt			4,099,000,000.0				3,631,900,000
Long-term Debt and Other Securities Issued, Retired and Principal Payments Made
Retirements and Principal Payments			12,000,000.0		$ 11,700,000
Accounts Receivable and Accrued Unbilled Revenues
Accounts Receivable and Accrued Unbilled Revenues			132,400,000				133,300,000
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold			788,400,000		826,300,000
Proceeds from Sale of Receivables
Proceeds from Sale of Receivables to AEP Credit			$ 374,400,000		$ 400,200,000
Financing Activities (Textuals)
Maximum Percentage Debt to Capitalization			67.50%
Appalachian Power Co [Member] | Utility [Member]
Money Pool Participants Money Pool Activity And Authorized Borrowing Limits
Maximum Borrowings from Money Pool			$ 225,400,000
Maximum Loans to Money Pool			232,200,000
Average Borrowings from Money Pool			189,300,000
Average Loans to Money Pool			75,900,000
Net Loans (Borrowings) to/from Utility Money Pool			216,600,000
Authorized Short Term Borrowing Limit			$ 600,000,000.0
Maximum and Minimum Interest Rates
Maximum Interest Rate			3.02%		2.42%
Minimum Interest Rate			2.73%		1.83%
Average Interest Rates for Funds Borrowed From and Loaned to Money Pool
Average Interest Rate For Funds Borrowed			2.92%		2.00%
Average Interest Rate For Funds Loaned			2.79%		2.00%
Appalachian Power Co [Member] | Securitization Bonds [Member]
Long-term Debt and Other Securities Issued, Retired and Principal Payments Made
Retirements and Principal Payments			$ 12,000,000.0
Debt Instrument, Interest Rate, Stated Percentage			2.01%
Due Date			2023
Appalachian Power Co [Member] | Senior Unsecured Notes [Member]
Long-term Debt and Other Securities Issued, Retired and Principal Payments Made
Issuances	[3]		$ 400,000,000.0
Debt Instrument, Interest Rate, Stated Percentage			4.50%
Due Date			2049
Indiana Michigan Power Co [Member]
Long-term Debt
Total Long-term Debt Outstanding			$ 3,011,400,000				3,035,400,000
Long-term Debt Due Within One Year			140,400,000				155,400,000
Long-term Debt			2,871,000,000.0				2,880,000,000.0
Long-term Debt and Other Securities Issued, Retired and Principal Payments Made
Retirements and Principal Payments			26,500,000		$ 29,400,000
Accounts Receivable and Accrued Unbilled Revenues
Accounts Receivable and Accrued Unbilled Revenues			165,400,000				152,900,000
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold			619,100,000		576,300,000
Proceeds from Sale of Receivables
Proceeds from Sale of Receivables to AEP Credit			$ 478,600,000		$ 459,100,000
Financing Activities (Textuals)
Maximum Percentage Debt to Capitalization			67.50%
Indiana Michigan Power Co [Member] | Utility [Member]
Money Pool Participants Money Pool Activity And Authorized Borrowing Limits
Maximum Borrowings from Money Pool			$ 46,300,000
Maximum Loans to Money Pool			66,000,000.0
Average Borrowings from Money Pool			19,000,000.0
Average Loans to Money Pool			23,200,000
Net Loans (Borrowings) to/from Utility Money Pool			(21,900,000)
Authorized Short Term Borrowing Limit			$ 500,000,000.0
Maximum and Minimum Interest Rates
Maximum Interest Rate			3.02%		2.42%
Minimum Interest Rate			2.73%		1.83%
Average Interest Rates for Funds Borrowed From and Loaned to Money Pool
Average Interest Rate For Funds Borrowed			2.80%		2.02%
Average Interest Rate For Funds Loaned			2.87%		2.00%
Indiana Michigan Power Co [Member] | Notes Payable [Member]
Long-term Debt and Other Securities Issued, Retired and Principal Payments Made
Retirements and Principal Payments			$ 1,400,000
Interest Rate (Variable)			Variable
Due Date			2019
Indiana Michigan Power Co [Member] | Notes Payable [Member] | Subsequent Event [Member]
Long-term Debt and Other Securities Issued, Retired and Principal Payments Made
Retirements and Principal Payments		$ 2,000,000
Indiana Michigan Power Co [Member] | Notes Payable Two [Member]
Long-term Debt and Other Securities Issued, Retired and Principal Payments Made
Retirements and Principal Payments			$ 1,400,000
Interest Rate (Variable)			Variable
Due Date			2019
Indiana Michigan Power Co [Member] | Notes Payable Three [Member]
Long-term Debt and Other Securities Issued, Retired and Principal Payments Made
Retirements and Principal Payments			$ 7,100,000
Interest Rate (Variable)			Variable
Due Date			2020
Indiana Michigan Power Co [Member] | Notes Payable Four [Member]
Long-term Debt and Other Securities Issued, Retired and Principal Payments Made
Retirements and Principal Payments			$ 5,900,000
Interest Rate (Variable)			Variable
Due Date			2021
Indiana Michigan Power Co [Member] | Notes Payable Five [Member]
Long-term Debt and Other Securities Issued, Retired and Principal Payments Made
Retirements and Principal Payments			$ 5,000,000.0
Interest Rate (Variable)			Variable
Due Date			2022
Indiana Michigan Power Co [Member] | Notes Payable, Six [Member]
Long-term Debt and Other Securities Issued, Retired and Principal Payments Made
Retirements and Principal Payments			$ 5,300,000
Interest Rate (Variable)			Variable
Due Date			2022
Indiana Michigan Power Co [Member] | Other Long Term Debt [Member]
Long-term Debt and Other Securities Issued, Retired and Principal Payments Made
Retirements and Principal Payments			$ 400,000
Debt Instrument, Interest Rate, Stated Percentage			6.00%
Due Date			2025
Ohio Power Co [Member]
Long-term Debt
Total Long-term Debt Outstanding			$ 1,693,600,000				1,716,600,000
Long-term Debt Due Within One Year			24,600,000				47,900,000
Long-term Debt			1,669,000,000.0				1,668,700,000
Long-term Debt and Other Securities Issued, Retired and Principal Payments Made
Retirements and Principal Payments			23,400,000		$ 22,900,000
Accounts Receivable and Accrued Unbilled Revenues
Accounts Receivable and Accrued Unbilled Revenues			383,800,000				395,200,000
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold			828,100,000		780,700,000
Proceeds from Sale of Receivables
Proceeds from Sale of Receivables to AEP Credit			636,800,000		$ 680,000,000.0
Financing Activities (Textuals)
Reacquired Pollution Controls Bonds Held by Trustees			345,000,000
Ohio Power Co [Member] | Utility [Member]
Money Pool Participants Money Pool Activity And Authorized Borrowing Limits
Maximum Borrowings from Money Pool			238,100,000
Maximum Loans to Money Pool			0
Average Borrowings from Money Pool			156,900,000
Average Loans to Money Pool			0
Net Loans (Borrowings) to/from Utility Money Pool			(227,600,000)
Authorized Short Term Borrowing Limit			$ 500,000,000.0
Maximum and Minimum Interest Rates
Maximum Interest Rate			3.02%		2.42%
Minimum Interest Rate			2.73%		1.83%
Average Interest Rates for Funds Borrowed From and Loaned to Money Pool
Average Interest Rate For Funds Borrowed			2.85%		2.00%
Average Interest Rate For Funds Loaned			0.00%		2.40%
Ohio Power Co [Member] | Securitization Bonds [Member]
Long-term Debt and Other Securities Issued, Retired and Principal Payments Made
Retirements and Principal Payments			$ 23,400,000
Debt Instrument, Interest Rate, Stated Percentage			2.05%
Due Date			2019
Public Service Co Of Oklahoma [Member]
Long-term Debt
Total Long-term Debt Outstanding			$ 1,386,200,000				1,287,000,000.0
Long-term Debt Due Within One Year			375,500,000				375,500,000
Long-term Debt			1,010,700,000				911,500,000
Long-term Debt and Other Securities Issued, Retired and Principal Payments Made
Retirements and Principal Payments			100,000		$ 100,000
Accounts Receivable and Accrued Unbilled Revenues
Accounts Receivable and Accrued Unbilled Revenues			103,200,000				109,700,000
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold			334,000,000.0		333,500,000
Proceeds from Sale of Receivables
Proceeds from Sale of Receivables to AEP Credit			$ 324,500,000		$ 332,600,000
Financing Activities (Textuals)
Maximum Percentage Debt to Capitalization			67.50%
Public Service Co Of Oklahoma [Member] | Utility [Member]
Money Pool Participants Money Pool Activity And Authorized Borrowing Limits
Maximum Borrowings from Money Pool			$ 140,500,000
Maximum Loans to Money Pool			0
Average Borrowings from Money Pool			89,100,000
Average Loans to Money Pool			0
Net Loans (Borrowings) to/from Utility Money Pool			(55,200,000)
Authorized Short Term Borrowing Limit			$ 300,000,000.0
Maximum and Minimum Interest Rates
Maximum Interest Rate			3.02%		2.42%
Minimum Interest Rate			2.73%		1.83%
Average Interest Rates for Funds Borrowed From and Loaned to Money Pool
Average Interest Rate For Funds Borrowed			2.89%		2.01%
Average Interest Rate For Funds Loaned			0.00%		0.00%
Public Service Co Of Oklahoma [Member] | Other Long Term Debt [Member]
Long-term Debt and Other Securities Issued, Retired and Principal Payments Made
Retirements and Principal Payments			$ 100,000
Debt Instrument, Interest Rate, Stated Percentage			3.00%
Due Date			2027
Public Service Co Of Oklahoma [Member] | Senior Unsecured Notes [Member]
Long-term Debt and Other Securities Issued, Retired and Principal Payments Made
Issuances	[3]		$ 100,000,000.0
Debt Instrument, Interest Rate, Stated Percentage			3.91%
Due Date			2029
Southwestern Electric Power Co [Member]
Long-term Debt
Total Long-term Debt Outstanding			$ 2,659,100,000				2,713,400,000
Long-term Debt Due Within One Year			6,200,000				59,700,000
Long-term Debt			2,652,900,000				2,653,700,000
Long-term Debt and Other Securities Issued, Retired and Principal Payments Made
Retirements and Principal Payments			55,100,000		$ 383,400,000
Accounts Receivable and Accrued Unbilled Revenues
Accounts Receivable and Accrued Unbilled Revenues			129,100,000				$ 150,300,000
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold			426,400,000		419,700,000
Proceeds from Sale of Receivables
Proceeds from Sale of Receivables to AEP Credit			$ 371,900,000		$ 397,600,000
Financing Activities (Textuals)
Maximum Percentage Debt to Capitalization			67.50%
Southwestern Electric Power Co [Member] | Utility [Member]
Money Pool Participants Money Pool Activity And Authorized Borrowing Limits
Maximum Borrowings from Money Pool			$ 100,600,000
Maximum Loans to Money Pool			81,400,000
Average Borrowings from Money Pool			41,900,000
Average Loans to Money Pool			24,000,000.0
Net Loans (Borrowings) to/from Utility Money Pool			(74,000,000.0)
Authorized Short Term Borrowing Limit			$ 350,000,000.0
Maximum and Minimum Interest Rates
Maximum Interest Rate			3.02%		2.42%
Minimum Interest Rate			2.73%		1.83%
Average Interest Rates for Funds Borrowed From and Loaned to Money Pool
Average Interest Rate For Funds Borrowed			2.81%		2.10%
Average Interest Rate For Funds Loaned			2.97%		1.88%
Southwestern Electric Power Co [Member] | Nonutility [Member]
Money Pool Participants Money Pool Activity And Authorized Borrowing Limits
Maximum Loans to Money Pool			$ 2,000,000.0
Average Loans to Money Pool			2,000,000.0
Net Loans (Borrowings) to/from Utility Money Pool			$ 2,000,000.0
Maximum and Minimum Interest Rates
Maximum Interest Rate For Funds Loaned			3.02%		2.42%
Minimum Interest Rate for Funds Loaned			2.73%		1.83%
Average Interest Rates for Funds Borrowed From and Loaned to Money Pool
Average Interest Rate For Funds Loaned			2.87%		2.00%
Southwestern Electric Power Co [Member] | Notes Payable [Member]
Long-term Debt and Other Securities Issued, Retired and Principal Payments Made
Retirements and Principal Payments			$ 1,600,000
Debt Instrument, Interest Rate, Stated Percentage			4.58%
Due Date			2032
Southwestern Electric Power Co [Member] | Pollution Control Bonds [Member]
Long-term Debt and Other Securities Issued, Retired and Principal Payments Made
Retirements and Principal Payments			$ 53,500,000
Debt Instrument, Interest Rate, Stated Percentage			1.60%
Due Date			2019
Transource Energy [Member] | Other Long Term Debt [Member]
Long-term Debt and Other Securities Issued, Retired and Principal Payments Made
Issuances	[3]		$ 6,300,000
Interest Rate (Variable)			Variable
Due Date			2020
Transource Energy [Member] | Other Long Term Debt [Member] | Subsequent Event [Member]
Long-term Debt and Other Securities Issued, Retired and Principal Payments Made
Issuances		$ 2,000,000
Interest Rate (Variable)		Variable
Due Date		2020
Commercial Paper [Member]
Short-term Debt:
Weighted Average Interest Rate	[5]		2.75%				2.96%
July 2020 [Member]
Financing Activities (Textuals)
Commitment From Bank Conduits To Finance Receivables			$ 125,000,000
July 2021 [Member]
Financing Activities (Textuals)
Commitment From Bank Conduits To Finance Receivables			$ 625,000,000
Maximum [Member]
Financing Activities (Textuals)
AEP Share Price For Equity Unit Conversion			$ 99.58
Shares Per Equity Unit			0.6026
Minimum [Member]
Financing Activities (Textuals)
AEP Share Price For Equity Unit Conversion			$ 82.98
Shares Per Equity Unit			0.5021
Additional Paid-in Capital [Member]
Financing Activities (Textuals)
Stockholders' Equity, Other			$ 62,100,000	[10]	$ 0
Servicing Contracts [Member] | Appalachian Power Co [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold			2,200,000		1,700,000
Servicing Contracts [Member] | Indiana Michigan Power Co [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold			2,800,000		2,100,000
Servicing Contracts [Member] | Ohio Power Co [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold			7,800,000		5,600,000
Servicing Contracts [Member] | Public Service Co Of Oklahoma [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold			2,100,000		1,800,000
Servicing Contracts [Member] | Southwestern Electric Power Co [Member]
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold			$ 2,600,000		$ 1,900,000

[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 $318 million and $317 million as of March 31, 2019 and December 31, 2018, 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.

[6] See “Equity Units” section below for additional information.

[7] The amounts presented reflect the revisions made to AEPTCo’s previously issued financial statements. See the “Revisions to Previously Issued Financial Statements” section of Note 1 for additional information.

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

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

[10] Includes $(62) million related to a forward equity purchase contract associated with the issuance of Equity Units. See “Equity Units” section of Footnote 13 - Financing Activities.