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v3.25.3

FINANCING ACTIVITIES (Tables) | 9 Months Ended
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Sep. 30, 2025
Debt Disclosure [Abstract] |
Schedule of Long-term Debt | The following table details long-term debt outstanding, net of issuance costs and premiums or discounts:
Type of Debt |  | September 30, 2025 |  | December 31, 2024
|  | (in millions)
Senior Unsecured Notes |  | $ | 37,865.2 |  |  | $ | 36,410.9 |
Pollution Control Bonds |  | 1,685.7 |  |  | 1,771.3 |
Notes Payable |  | 614.8 |  |  | 609.9 |
Securitization Bonds |  | 983.3 |  |  | 578.0 |
Spent Nuclear Fuel Obligation (a) |  | 326.7 |  |  | 316.3 |
Junior Subordinated Notes |  | 3,707.9 |  |  | 2,579.1 |
Other Long-term Debt |  | 954.0 |  |  | 377.3 |
Total Long-term Debt Outstanding |  | 46,137.6 |  |  | 42,642.8 |
Long-term Debt Due Within One Year |  | 1,898.6 |  |  | 3,335.0 |
Long-term Debt |  | $ | 44,239.0 |  |  | $ | 39,307.8 |
(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 $381 million and $367 million as of September 30, 2025 and December 31, 2024, respectively, and are included in Spent Nuclear Fuel and Decommissioning Trusts on the balance sheets.
Retirements and Principal Payments | Long-term debt and other securities issued, retired and principal payments made during the first nine months of 2025 are shown in the following tables:
|  |  |  | Principal |  | Interest |  |
Company |  | Type of Debt |  | Amount (a) |  | Rate |  | Due Date
Issuances: |  |  |  | (in millions) |  | (%) |  |
AEP |  | Junior Subordinated Notes |  | $ | 1,100.0 |  |  | 5.80 |  | 2056
AEP |  | Junior Subordinated Notes |  | 900.0 |  |  | 6.05 |  | 2056
AEP Texas |  | Other Long-term Debt |  | 400.0 |  |  | Variable |  | 2026
AEP Texas |  | Senior Unsecured Notes |  | 150.0 |  |  | 5.70 |  | 2034
AEP Texas |  | Senior Unsecured Notes |  | 750.0 |  |  | 5.85 |  | 2055
AEPTCo |  | Other Long-term Debt |  | 141.0 |  |  | Variable |  | 2028
AEPTCo |  | Senior Unsecured Notes |  | 425.0 |  |  | 5.38 |  | 2035
APCo |  | Other Long-term Debt |  | 425.0 |  |  | Variable |  | 2026
APCo |  | Pollution Control Bonds |  | 104.4 |  |  | 3.70 |  | 2028
APCo |  | Pollution Control Bonds |  | 65.3 |  |  | 3.30 |  | 2028
I&M |  | Notes Payable |  | 100.0 |  |  | 4.89 |  | 2029
I&M |  | Pollution Control Bonds |  | 150.0 |  |  | 3.70 |  | 2029
PSO |  | Senior Unsecured Notes |  | 800.0 |  | 5.45 |  | 2036
Non-Registrant: |  |  |  |  |  |  |  |
KPCo |  | Other Long-term Debt |  | 150.0 |  |  | Variable |  | 2026
KPCo |  | Securitization Bonds |  | 477.7 |  |  | 5.30 |  | 2045
Transource Energy |  | Other Long-term Debt |  | 36.6 |  |  | Variable |  | 2025
WPCo |  | Other Long-term Debt |  | 125.0 |  |  | Variable |  | 2026
Total Issuances |  |  |  | $ | 6,300.0 |  |  |  |  |
(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 |  | Junior Subordinated Notes |  | $ | 850.0 |  |  | 5.70 |  | 2025
AEP Texas |  | Other Long-term Debt |  | 400.0 |  |  | Variable |  | 2026
AEP Texas |  | Securitization Bonds |  | 10.3 |  |  | 2.06 |  | 2025
AEP Texas |  | Securitization Bonds |  | 14.2 |  |  | 2.29 |  | 2029
AEP Texas |  | Senior Unsecured Notes |  | 50.0 |  |  | 3.75 |  | 2025
AEPTCo |  | Senior Unsecured Notes |  | 50.0 |  |  | 3.66 |  | 2025
AEPTCo |  | Senior Unsecured Notes |  | 40.0 |  |  | 3.76 |  | 2025
APCo |  | Other Long-term Debt |  | 0.1 |  |  | 13.72 |  | 2026
APCo |  | Pollution Control Bonds |  | 104.4 |  |  | 3.75 |  | 2025
APCo |  | Pollution Control Bonds |  | 65.4 |  |  | 1.00 |  | 2025
APCo |  | Securitization Bonds |  | 28.4 |  |  | 3.77 |  | 2028
APCo |  | Senior Unsecured Notes |  | 300.0 |  |  | 3.40 |  | 2025
I&M |  | Notes Payable |  | 3.9 |  |  | 0.93 |  | 2025
I&M |  | Notes Payable |  | 1.1 |  |  | Variable |  | 2025
I&M |  | Notes Payable |  | 8.4 |  |  | 3.44 |  | 2026
I&M |  | Notes Payable |  | 13.2 |  |  | 5.93 |  | 2027
I&M |  | Notes Payable |  | 24.6 |  |  | 6.41 |  | 2028
I&M |  | Notes Payable |  | 15.4 |  |  | 6.01 |  | 2028
I&M |  | Notes Payable |  | 13.1 |  |  | 4.89 |  | 2029
I&M |  | Other Long-term Debt |  | 0.2 |  |  | 6.00 |  | 2025
I&M |  | Pollution Control Bonds |  | 100.0 |  |  | 3.05 |  | 2025
I&M |  | Pollution Control Bonds |  | 50.0 |  |  | 2.75 |  | 2025
I&M |  | Pollution Control Bonds |  | 40.0 |  |  | 0.75 |  | 2025
PSO |  | Other Long-term Debt |  | 0.4 |  |  | 3.00 |  | 2027
PSO |  | Senior Unsecured Notes |  | 125.0 |  |  | 3.17 |  | 2025
SWEPCo |  | Securitization Bonds |  | 11.1 |  |  | 4.88 |  | 2039
Non-Registrant: |  |  |  |  |  |  |  |
AEGCo |  | Pollution Control Bonds |  | 45.0 |  |  | 1.35 |  | 2025
KPCo |  | Other Long-term Debt |  | 150.0 |  |  | Variable |  | 2025
KPCo |  | Other Long-term Debt |  | 150.0 |  |  | Variable |  | 2026
Transource Energy |  | Senior Unsecured Notes |  | 2.6 |  |  | 2.75 |  | 2050
WPCo |  | Notes Payable |  | 15.0 |  |  | 6.89 |  | 2034
WPCo |  | Senior Unsecured Notes |  | 122.0 |  |  | 3.70 |  | 2025
Total Retirements and Principal Payments |  | $ | 2,803.8 |  |  |  |  |
Schedule of Utility Money Pool Participants' Money Pool Activity and Authorized Borrowing Limits | The Utility Money Pool participants’ money pool activity and corresponding authorized borrowing limits for the nine months ended September 30, 2025 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, 2025 |  | Limit |
|  | (in millions)
AEP Texas |  | $ | 468.4 |  |  | $ | 485.7 |  |  | $ | 172.6 |  |  | $ | 82.5 |  |  | $ | 418.1 |  |  | $ | 600.0 |  |
AEPTCo |  | 403.6 |  |  | 312.2 |  |  | 174.8 |  |  | 44.2 |  |  | (89.3) |  |  | 820.0 |  | (a)
APCo |  | 263.5 |  |  | 242.1 |  |  | 127.8 |  |  | 26.1 |  |  | 49.6 |  |  | 750.0 |  |
I&M |  | 145.2 |  |  | 157.2 |  |  | 71.4 |  |  | 46.2 |  |  | 157.2 |  |  | 500.0 |  |
OPCo |  | 270.9 |  |  | 165.9 |  |  | 126.0 |  |  | 81.7 |  |  | (13.0) |  |  | 600.0 |  |
PSO |  | 505.1 |  |  | 391.5 |  |  | 221.2 |  |  | 166.1 |  |  | (39.7) |  |  | 750.0 |  |
SWEPCo |  | 471.9 |  |  | 269.7 |  |  | 285.9 |  |  | 88.7 |  |  | 269.7 |  |  | 750.0 |  |
(a) Amount represents the combined authorized short-term borrowing limit the State Transcos have from FERC or state regulatory commissions.
Schedule of Nonutility Money Pool Activity | The Nonutility Money Pool participants’ activity for the nine months ended September 30, 2025 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, 2025
| (in millions)
AEP Texas |  | $ | 7.2 |  |  | $ | 7.1 |  |  | $ | 7.2 |
SWEPCo |  | 2.4 |  |  | 2.1 |  |  | — |
Schedule of Direct Borrowing Activity | AEPTCo’s direct financing activities with AEP and corresponding authorized borrowing limit for the nine months ended September 30, 2025 are described in the following table:
|  |  |  |  |  |  |  |  |  | Borrowings |  |  |  | Authorized |
|  | Maximum |  | Maximum |  | Average |  | Average |  | from AEP |  | Loans to |  | Short-term |
|  | Borrowings |  | Loans |  | Borrowings |  | Loans |  | as of |  | AEP as of |  | Borrowing |
Company |  | from AEP |  | to AEP |  | from AEP |  | to AEP |  | September 30, 2025 |  | September 30, 2025 |  | Limit (a) |
|  | (in millions)
AEPTCo Parent |  | $ | 106.6 |  |  | $ | 132.6 |  |  | $ | 17.7 |  |  | $ | 45.3 |  |  | $ | — |  |  | $ | 49.7 |  |  | $ | — |  |
SWTCo |  | 2.0 |  |  | — |  |  | 1.9 |  |  | — |  |  | 2.0 |  |  | — |  |  | 50.0 |  |
Midwest Transmission Holdings |  | — |  |  | 34.1 |  |  | — |  |  | 6.1 |  |  | — |  |  | 0.3 |  |  | — |  |
(a) Amount represents the authorized short-term borrowing limit from FERC or state regulatory agencies not otherwise included in the utility money pool above.
Schedule of Maximum and Minimum Interest Rates for Funds Either Borrowed from or Loaned to Utility Money Pool | 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,
|  | 2025 |  | 2024
Maximum Interest Rate |  | 4.83 | % |  | 5.79 | %
Minimum Interest Rate |  | 4.00 | % |  | 5.14 | %
Schedule of Average Interest Rates for Funds Borrowed from and Loaned to Utility Money Pool | The average interest rates for funds borrowed from and loaned to the Utility Money Pool are summarized 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 |  | 2025 |  | 2024 |  | 2025 |  | 2024
AEP Texas |  | 4.67 | % |  | 5.69 | % |  | 4.37 | % |  | 5.48 | %
AEPTCo |  | 4.65 | % |  | 5.68 | % |  | 4.62 | % |  | 5.58 | %
APCo |  | 4.67 | % |  | 5.72 | % |  | 4.58 | % |  | 5.51 | %
I&M |  | 4.69 | % |  | 5.64 | % |  | 4.50 | % |  | 5.44 | %
OPCo |  | 4.61 | % |  | 5.70 | % |  | 4.70 | % |  | 5.49 | %
PSO |  | 4.64 | % |  | 5.59 | % |  | 4.68 | % |  | — | %
SWEPCo |  | 4.69 | % |  | 5.58 | % |  | 4.55 | % |  | — | %
Schedule of Maximum, Minimum and Average Interest Rates for Funds Borrowed from and Loaned to the Nonutility Money Pool | 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, 2025 |  | Nine Months Ended September 30, 2024
|  | 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 |  | 4.76 | % |  | 4.27 | % |  | 4.66 | % |  | 5.79 | % |  | 5.25 | % |  | 5.64 | %
SWEPCo |  | 4.76 | % |  | 4.62 | % |  | 4.69 | % |  | 5.79 | % |  | 5.25 | % |  | 5.64 | %
Schedule of Maximum Minimum and Average Interest Rates for Funds Borrowed from and Loaned to AEP | 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
2025 |  | 4.76 | % |  | 4.27 | % |  | 4.76 | % |  | 4.27 | % |  | 4.64 | % |  | 4.64 | %
2024 |  | 5.79 | % |  | 5.25 | % |  | 5.79 | % |  | 5.25 | % |  | 5.66 | % |  | 5.63 | %
Schedule of Short-term Debt | Outstanding short-term debt was as follows:
|  |  |  | September 30, 2025 |  | December 31, 2024
|  |  |  | 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 |  |  | 4.56 | % |  | $ | 900.0 |  |  | 4.73 | %
AEP |  | Commercial Paper |  | 250.0 |  |  | 4.30 | % |  | 1,618.3 |  |  | 4.70 | %
SWEPCo |  | Notes Payable |  | 7.7 |  |  | 6.50 | % |  | 5.5 |  |  | 6.69 | %
|  | Total Short-term Debt |  | $ | 1,157.7 |  |  |  |  | $ | 2,523.8 |  |  |
(a)Weighted-average rate as of September 30, 2025 and December 31, 2024, respectively. (b)Amount of securitized debt for receivables as accounted for under the “Transfers and Servicing” accounting guidance.
Schedule of Comparative Accounts Receivable Information | Accounts receivable information for AEP Credit was as follows:
|  | Three Months Ended September 30, |  | Nine Months Ended September 30,
|  | 2025 |  | 2024 |  | 2025 |  | 2024
|  | (dollars in millions)
Effective Interest Rates on Securitization of Accounts Receivable |  | 4.52 | % |  | 5.50 | % |  | 4.56 | % |  | 5.54 | %
Net Uncollectible Accounts Receivable Written-Off |  | $ | 10.8 |  |  | $ | 8.4 |  |  | $ | 24.7 |  |  | $ | 22.3 |
Schedule of Customer Accounts Receivable Managed Portfolio |
|  | September 30, 2025 |  | December 31, 2024
|  | (in millions)
Accounts Receivable Retained Interest and Pledged as Collateral Less Uncollectible Accounts |  | $ | 1,292.8 |  |  | $ | 1,117.0 |
Short-term – Securitized Debt of Receivables |  | 900.0 |  |  | 900.0 |
Delinquent Securitized Accounts Receivable |  | 79.4 |  |  | 56.2 |
Bad Debt Reserves Related to Securitization |  | 43.4 |  |  | 44.5 |
Unbilled Receivables Related to Securitization |  | 319.4 |  |  | 335.5 |
Schedule of Accounts Receivable and Accrued Unbilled Revenues | The amount of accounts receivable and accrued unbilled revenues under the sale of receivables agreements were:
Company |  | September 30, 2025 |  | December 31, 2024
|  | (in millions)
APCo |  | $ | 183.0 |  |  | $ | 192.7 |
I&M |  | 185.0 |  |  | 160.5 |
OPCo |  | 490.9 |  |  | 470.7 |
PSO |  | 202.5 |  |  | 111.4 |
SWEPCo |  | 200.3 |  |  | 153.5 |
Schedule of Fees Paid to AEP Credit for Customer Accounts Receivable Sold | The fees paid to AEP Credit for customer accounts receivable sold were:
|  | Three Months Ended September 30, |  | Nine Months Ended September 30,
Company |  | 2025 |  | 2024 |  | 2025 |  | 2024
|  | (in millions)
APCo |  | $ | 3.7 |  |  | $ | 4.0 |  |  | $ | 10.9 |  |  | $ | 12.1 |
I&M |  | 4.2 |  |  | 4.1 |  |  | 11.2 |  |  | 12.0 |
OPCo |  | 7.4 |  |  | 7.5 |  |  | 22.3 |  |  | 22.3 |
PSO |  | 4.0 |  |  | 4.1 |  |  | 9.7 |  |  | 10.9 |
SWEPCo |  | 4.1 |  |  | 4.4 |  |  | 11.9 |  |  | 13.5 |
Schedule of Proceeds on Sale of Receivables to AEP Credit | The proceeds on the sale of receivables to AEP Credit were:
|  | Three Months Ended September 30, |  | Nine Months Ended September 30,
Company |  | 2025 |  | 2024 |  | 2025 |  | 2024
|  | (in millions)
APCo |  | $ | 495.4 |  |  | $ | 504.6 |  |  | $ | 1,530.0 |  |  | $ | 1,487.9 |
I&M |  | 682.6 |  |  | 576.7 |  |  | 1,812.7 |  |  | 1,608.5 |
OPCo |  | 927.8 |  |  | 860.0 |  |  | 2,523.3 |  |  | 2,477.2 |
PSO |  | 659.6 |  |  | 611.5 |  |  | 1,466.3 |  |  | 1,398.1 |
SWEPCo |  | 549.9 |  |  | 531.4 |  |  | 1,434.0 |  |  | 1,428.7 |

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- Definition [Table Text Block] for Tabular disclosure of the Direct borrowing participants; activity including: (1) Maximum borrowings from AEP; (2) Maximum Loans to AEP; (3) Average Borrowings from AEP; (4) Average Loans to AEP; (5) Borrowings from AEP as of the balance sheet date; (6) Loans to AEP as of the balance sheet date. Direct Borrowing represents centralized funding mechanism AEP uses to meet the short-term cash requirement of certain subsidiaries. + References No definition available. + Details
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- Definition Tabular disclosure of a Nonutility Money Pool participants' money pool activity including: (1) Maximum Loans to Nonutility Money Pool; (2) Average Loans to Nonutility Money Pool; (3) Net Loans (Borrowings) to/from Nonutility Money Pool as of the balance sheet date. The Nonutility Money Pool represents centralized funding mechanism AEP uses to meet the short-term cash requirements of certain nonutility subsidiaries. + References No definition available. + Details
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- Definition Tabular disclosure of the average interest rates for funds borrowed from and loaned to a Utility Money Pool. The Utility Money Pool represents centralized funding mechanism AEP uses to meet the short-term cash requirements of certain utility subsidiaries. + References No definition available. + Details
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- Definition Tabular disclosure of the maximum and minimum weighted-average interest rate, calculated on a daily basis, of funds either borrowed from or loaned to a Utility Money Pool during the period. The Utility Money Pool represents centralized funding mechanism AEP uses to meet the short-term cash requirements of certain utility subsidiaries. + References No definition available. + Details
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- Definition Tabular disclosure of the maximum and minimum weighted-average interest rate, calculated on a daily basis and the average interest rates of funds borrowed from or loaned to a Nonutility Money Pool during the period.The Nonutility Money Pool represents centralized funding mechanism AEP uses to meet the short-term cash requirements of certain nonutility subsidiaries. + References No definition available. + Details
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- Definition Tabular disclosure of a Utility Money Pool participants' money pool activity and authorized borrowing limits including: (1) Maximum Borrowings from Utility Money Pool; (2) Maximum Loans to Utility Money Pool; (3) Average Borrowings from Utility Money Pool; (4) Average Loans to Utility Money Pool; (5) Net Loans (Borrowings) to/from Utility Money Pool as of the balance sheet date; (6) Authorized Short-term Borrowing Limit. The Utility Money Pool represents centralized funding mechanism AEP uses to meet the short-term cash requirements of certain utility subsidiaries. + References No definition available. + Details
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- Definition Tabular disclosure of debt extinguished which may include, amount of gain (loss), the income tax effect and the per share amount of the aggregate gain (loss), net of the related income tax. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 470 -SubTopic 50 -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481244/470-50-50-1 + Details
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- Definition Tabular disclosure of short-term debt arrangements (having initial terms of repayment within one year or the normal operating cycle, if longer) including: (1) description of the short-term debt arrangement; (2) identification of the lender or type of lender; (3) repayment terms; (4) weighted average interest rate; (5) carrying amount of funds borrowed under the specified short-term debt arrangement as of the balance sheet date; (6) description of the refinancing of a short-term obligation when that obligation is excluded from current liabilities in the balance sheet; and (7) amount of a short-term obligation that has been excluded from current liabilities in the balance sheet because of a refinancing of the obligation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(19)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 + Details
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