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v3.23.1

Variable Interest Entities (Details) $ in Millions | 12 Months Ended |
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Dec. 31, 2022 USD ($) MW | Dec. 31, 2021 USD ($) | Dec. 31, 2020 USD ($) | Dec. 31, 2019 USD ($)
ASSETS |  |  |  |  |  |  |
Current Assets |  | $ 6,775.5 |  | $ 4,984.4 |  |  |
Net Property, Plant and Equipment |  | 73,339.1 |  | 68,304.1 |  |  |
Other Noncurrent Assets |  | 13,288.7 |  | 14,380.2 |  |  |
Total Assets |  | 93,403.3 |  | 87,668.7 |  |  |
LIABILITIES AND EQUITY |  |  |  |  |  |  |
Current Liabilities |  | 13,266.3 |  | 10,906.4 |  |  |
Noncurrent Liabilities |  | 55,968.7 |  | 54,038.8 |  |  |
Equity |  | 24,122.4 |  | 22,680.2 |  | $ 20,774.5 | $ 19,913.2
Total Liabilities and Equity |  | 93,403.3 |  | 87,668.7 |  |  |
Variable Interest Entities (Textuals) |  |  |  |  |  |  |
Securitization Bonds |  | 487.8 |  | 603.5 |  |  |
Securitized Assets |  | $ 446.0 |  | 552.8 |  |  |
Equity Method Investment, Ownership Percentage |  | 50.00% |  |  |  |  |
Equity Method Investments |  | $ 1,276.7 |  | 1,447.5 |  | 1,406.3 |
Equity Method Investment Income |  | 109.4 |  | (91.7) |  | (91.1) |
Generation and Marketing [Member] |  |  |  |  |  |  |
ASSETS |  |  |  |  |  |  |
Total Assets |  | 4,520.1 |  | 4,263.6 |  |  |
Variable Interest Entities (Textuals) |  |  |  |  |  |  |
Equity Method Investments |  | 337.6 |  | 487.8 |  | 467.0 |
Equity Method Investment Income |  | 192.4 |  | 10.6 |  | (3.2) |
Unregulated Operation [Member] |  |  |  |  |  |  |
ASSETS |  |  |  |  |  |  |
Net Property, Plant and Equipment |  | 2,031.6 |  | 2,000.1 |  |  |
Protected Cell Of Energy Insurance Services, Inc. [Member] |  |  |  |  |  |  |
Variable Interest Entities (Textuals) |  |  |  |  |  |  |
Insurance Premium Expense to Protected Cell |  | 31.0 |  | 30.0 |  | 31.0 |
Protected Cell Of Energy Insurance Services, Inc. [Member] | Variable Interest Entities [Member] |  |  |  |  |  |  |
ASSETS |  |  |  |  |  |  |
Current Assets |  | 194.5 |  | 217.3 |  |  |
Net Property, Plant and Equipment |  | 0.0 |  | 0.0 |  |  |
Other Noncurrent Assets |  | 0.3 |  | 0.0 |  |  |
Total Assets |  | 194.8 |  | 217.3 |  |  |
LIABILITIES AND EQUITY |  |  |  |  |  |  |
Current Liabilities |  | 46.4 |  | 37.5 |  |  |
Noncurrent Liabilities |  | 79.1 |  | 82.3 |  |  |
Equity |  | 69.3 |  | 97.5 |  |  |
Total Liabilities and Equity |  | $ 194.8 |  | 217.3 |  |  |
Transource Energy [Member] |  |  |  |  |  |  |
Variable Interest Entities (Textuals) |  |  |  |  |  |  |
Debt-to-Total Capitalization Maximum |  | 67.50% |  |  |  |  |
Transource Energy [Member] | Variable Interest Entities [Member] |  |  |  |  |  |  |
ASSETS |  |  |  |  |  |  |
Current Assets |  | $ 23.5 |  | 38.8 |  |  |
Net Property, Plant and Equipment |  | 482.3 |  | 475.4 |  |  |
Other Noncurrent Assets |  | 2.7 |  | 3.0 |  |  |
Total Assets |  | 508.5 |  | 517.2 |  |  |
LIABILITIES AND EQUITY |  |  |  |  |  |  |
Current Liabilities |  | 22.8 |  | 12.5 |  |  |
Noncurrent Liabilities |  | 218.6 |  | 216.9 |  |  |
Equity |  | 267.1 |  | 287.8 |  |  |
Total Liabilities and Equity |  | 508.5 |  | 517.2 |  |  |
Trent and Desert Sky Wind Farms [Member] | Generation and Marketing [Member] |  |  |  |  |  |  |
Variable Interest Entities (Textuals) |  |  |  |  |  |  |
Redeemable Noncontrolling Interest |  | 63.0 |  |  |  |  |
Apple Blossom and Black Oak [Member] |  |  |  |  |  |  |
Variable Interest Entities (Textuals) |  |  |  |  |  |  |
Noncontrolling Interest in Variable Interest Entity |  | 94.0 |  | 108.0 |  |  |
HLBV Income for Noncontrolling Interests |  | $ 9.0 |  | 7.0 |  |  |
Long-term PPA Energy Production |  | 100.00% |  |  |  |  |
Apple Blossom and Black Oak [Member] | Variable Interest Entities [Member] |  |  |  |  |  |  |
ASSETS |  |  |  |  |  |  |
Current Assets |  | $ 8.3 |  | 9.9 |  |  |
Net Property, Plant and Equipment |  | 216.5 |  | 217.3 |  |  |
Other Noncurrent Assets |  | 13.6 |  | 11.3 |  |  |
Total Assets |  | 238.4 |  | 238.5 |  |  |
LIABILITIES AND EQUITY |  |  |  |  |  |  |
Current Liabilities |  | 4.5 |  | 6.6 |  |  |
Noncurrent Liabilities |  | 5.4 |  | 5.2 |  |  |
Equity |  | 228.5 |  | 226.7 |  |  |
Total Liabilities and Equity |  | 238.4 |  | 238.5 |  |  |
Santa Rita East [Member] |  |  |  |  |  |  |
Variable Interest Entities (Textuals) |  |  |  |  |  |  |
Noncontrolling Interest in Variable Interest Entity |  | 58.0 |  | 59.0 |  |  |
Production Tax Credits |  | $ 24.0 |  | 25.0 |  | $ 23.0 |
Equity Ownership Percentage |  | 85.00% |  |  |  |  |
Equity Ownership Percentage |  | 85.00% |  |  |  |  |
Santa Rita East [Member] | Generation and Marketing [Member] |  |  |  |  |  |  |
Variable Interest Entities (Textuals) |  |  |  |  |  |  |
Percentage of an Asset Acquired |  | 85.00% |  |  |  | 10.00% |
WindGenerationMWs | MW |  | 302 |  |  |  |  |
Santa Rita East [Member] | Variable Interest Entities [Member] |  |  |  |  |  |  |
ASSETS |  |  |  |  |  |  |
Current Assets |  | $ 21.3 |  | 7.6 |  |  |
Net Property, Plant and Equipment |  | 421.6 |  | 437.6 |  |  |
Other Noncurrent Assets |  | 0.1 |  | 0.0 |  |  |
Total Assets |  | 443.0 |  | 445.2 |  |  |
LIABILITIES AND EQUITY |  |  |  |  |  |  |
Current Liabilities |  | 9.6 |  | 5.8 |  |  |
Noncurrent Liabilities |  | 7.3 |  | 7.0 |  |  |
Equity |  | 426.1 |  | 432.4 |  |  |
Total Liabilities and Equity |  | $ 443.0 |  | 445.2 |  |  |
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 |  | 25.00% |  |  |  |  |
AEP Credit, Inc. | Variable Interest Entities [Member] |  |  |  |  |  |  |
ASSETS |  |  |  |  |  |  |
Current Assets |  | $ 1,181.0 |  | 996.6 |  |  |
Net Property, Plant and Equipment |  | 0.0 |  | 0.0 |  |  |
Other Noncurrent Assets |  | 9.0 |  | 10.4 |  |  |
Total Assets |  | 1,190.0 |  | 1,007.0 |  |  |
LIABILITIES AND EQUITY |  |  |  |  |  |  |
Current Liabilities |  | 1,087.8 |  | 953.1 |  |  |
Noncurrent Liabilities |  | 0.9 |  | 0.9 |  |  |
Equity |  | 101.3 |  | 53.0 |  |  |
Total Liabilities and Equity |  | 1,190.0 |  | 1,007.0 |  |  |
Dolet Hills Lignite Co, LLC [Member] |  |  |  |  |  |  |
Variable Interest Entities (Textuals) |  |  |  |  |  |  |
Equity Method Investment Income |  | $ (1.4) |  | (3.4) |  | $ (2.9) |
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 |  | $ 1,100.0 |  | 1,100.0 |  |  |
Dry Lake Solar Project [Member] |  |  |  |  |  |  |
Variable Interest Entities (Textuals) |  |  |  |  |  |  |
Noncontrolling Interest in Variable Interest Entity |  | $ 34.0 |  | 35.0 |  |  |
Percentage of an Asset Acquired |  | 75.00% |  |  |  |  |
Dry Lake Solar Project [Member] | Generation and Marketing [Member] |  |  |  |  |  |  |
Variable Interest Entities (Textuals) |  |  |  |  |  |  |
Solar Generation MWs | MW |  | 100 |  |  |  |  |
Dry Lake Solar Project [Member] | Variable Interest Entities [Member] |  |  |  |  |  |  |
ASSETS |  |  |  |  |  |  |
Current Assets |  | $ 4.0 |  | 4.0 |  |  |
Net Property, Plant and Equipment |  | 142.6 |  | 146.1 |  |  |
Other Noncurrent Assets |  | 0.3 |  | 0.3 |  |  |
Total Assets |  | 146.9 |  | 150.4 |  |  |
LIABILITIES AND EQUITY |  |  |  |  |  |  |
Current Liabilities |  | 1.0 |  | 0.9 |  |  |
Noncurrent Liabilities |  | 0.7 |  | 0.6 |  |  |
Equity |  | 145.2 |  | 148.9 |  |  |
Total Liabilities and Equity |  | $ 146.9 |  | 150.4 |  |  |
Joint Venture Wind Farms [Member] |  |  |  |  |  |  |
Variable Interest Entities (Textuals) |  |  |  |  |  |  |
Long-term PPA Energy Production |  | 100.00% |  |  |  |  |
Rockport Generating Plant (Unit No. 2) [Member] |  |  |  |  |  |  |
Variable Interest Entities (Textuals) |  |  |  |  |  |  |
Jointly Owned Utility Plant, Proportionate Ownership Share |  | 100.00% |  |  |  |  |
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 |  | $ 4.4 |  | 4.4 |  |  |
Maximum Exposure |  | 4.4 |  | 4.4 |  |  |
Retained Earnings [Member] |  |  |  |  |  |  |
LIABILITIES AND EQUITY |  |  |  |  |  |  |
Equity |  | 12,345.6 |  | 11,667.1 |  | 10,687.8 | 9,900.9
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 |  | 0.0 |  |  |
Maximum Exposure | [1] | 478.2 |  | 492.0 |  |  |
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 |  | 4.4 |  | 4.4 |  |  |
Maximum Exposure |  | $ 482.6 |  | 496.4 |  |  |
Long-term PPA MWs [Member] | Santa Rita East [Member] |  |  |  |  |  |  |
Variable Interest Entities (Textuals) |  |  |  |  |  |  |
WindGenerationMWs | MW |  | 260 |  |  |  |  |
Sold at Wholesale MWs [Member] | Santa Rita East [Member] |  |  |  |  |  |  |
Variable Interest Entities (Textuals) |  |  |  |  |  |  |
WindGenerationMWs | MW |  | 42 |  |  |  |  |
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 |  | $ 188.7 |  | 165.0 |  |  |
Net Property, Plant and Equipment |  | 13,339.9 |  | 12,101.0 |  |  |
Other Noncurrent Assets |  | 285.6 |  | 258.4 |  |  |
Total Assets |  | 13,814.2 |  | 12,524.4 |  |  |
LIABILITIES AND EQUITY |  |  |  |  |  |  |
Current Liabilities |  | 1,368.0 |  | 1,273.9 |  |  |
Noncurrent Liabilities |  | 6,573.2 |  | 5,874.4 |  |  |
Total Liabilities and Equity |  | 13,814.2 |  | 12,524.4 |  |  |
AEP Transmission Co [Member] | Unregulated Operation [Member] |  |  |  |  |  |  |
ASSETS |  |  |  |  |  |  |
Net Property, Plant and Equipment |  | 0.3 |  | 0.1 |  |  |
AEP Transmission Co [Member] | Billings from AEP Service Corporation [Member] |  |  |  |  |  |  |
Variable Interest Entities (Textuals) |  |  |  |  |  |  |
Billings from VIE |  | 286.6 |  | 267.1 |  | 270.3 |
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 |  | 31.6 |  | 23.3 |  |  |
Maximum Exposure |  | 31.6 |  | 23.3 |  |  |
Appalachian Power Co [Member] |  |  |  |  |  |  |
ASSETS |  |  |  |  |  |  |
Current Assets |  | 1,259.6 |  | 925.3 |  |  |
Net Property, Plant and Equipment |  | 12,379.2 |  | 11,804.3 |  |  |
Other Noncurrent Assets |  | 1,583.4 |  | 1,359.3 |  |  |
Total Assets |  | 15,222.2 |  | 14,088.9 |  |  |
LIABILITIES AND EQUITY |  |  |  |  |  |  |
Current Liabilities |  | 1,390.2 |  | 1,415.9 |  |  |
Noncurrent Liabilities |  | 8,856.6 |  | 8,025.1 |  |  |
Equity |  | 4,975.4 |  | 4,647.9 |  | 4,344.3 | 4,172.4
Total Liabilities and Equity |  | 15,222.2 |  | 14,088.9 |  |  |
Variable Interest Entities (Textuals) |  |  |  |  |  |  |
Securitization Bonds |  | 173.3 |  | 198.8 |  |  |
Securitized Assets |  | 159.6 |  | 185.1 |  |  |
Amount Of Power Purchased From OVEC |  | 119.3 |  | 104.3 |  | 94.4 |
Appalachian Power Co [Member] | Unregulated Operation [Member] |  |  |  |  |  |  |
ASSETS |  |  |  |  |  |  |
Net Property, Plant and Equipment |  | 29.4 |  | 23.3 |  |  |
Appalachian Power Co [Member] | Appalachian Consumer Rate Relief Funding [Member] |  |  |  |  |  |  |
Variable Interest Entities (Textuals) |  |  |  |  |  |  |
Securitized Assets |  | 160.0 |  | 185.0 |  |  |
Appalachian Power Co [Member] | Appalachian Consumer Rate Relief Funding [Member] | Variable Interest Entities [Member] |  |  |  |  |  |  |
ASSETS |  |  |  |  |  |  |
Current Assets |  | 13.5 |  | 16.0 |  |  |
Net Property, Plant and Equipment |  | 0.0 |  | 0.0 |  |  |
Other Noncurrent Assets |  | 164.6 | [2] | 187.8 | [3] |  |
Total Assets |  | 178.1 |  | 203.8 |  |  |
LIABILITIES AND EQUITY |  |  |  |  |  |  |
Current Liabilities |  | 29.3 |  | 29.0 |  |  |
Noncurrent Liabilities |  | 146.9 |  | 172.9 |  |  |
Equity |  | 1.9 |  | 1.9 |  |  |
Total Liabilities and Equity |  | $ 178.1 |  | 203.8 |  |  |
Appalachian Power Co [Member] | Ohio Valley Electric Corporation [Member] |  |  |  |  |  |  |
Variable Interest Entities (Textuals) |  |  |  |  |  |  |
Power Participation Ratio |  | 15.69% |  |  |  |  |
Outstanding Indebtedness |  | $ 173.0 |  | 177.0 |  |  |
Appalachian Power Co [Member] | Billings from AEP Service Corporation [Member] |  |  |  |  |  |  |
Variable Interest Entities (Textuals) |  |  |  |  |  |  |
Billings from VIE |  | 347.5 |  | 313.3 |  | 294.9 |
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 |  | 41.5 |  | 44.1 |  |  |
Maximum Exposure |  | 41.5 |  | 44.1 |  |  |
Appalachian Power Co [Member] | Retained Earnings [Member] |  |  |  |  |  |  |
LIABILITIES AND EQUITY |  |  |  |  |  |  |
Equity |  | 2,891.1 |  | 2,534.4 |  | 2,248.0 | 2,078.3
Appalachian Power Co [Member] | Other Noncurrent Assets [Member] | Appalachian Consumer Rate Relief Funding [Member] |  |  |  |  |  |  |
Variable Interest Entities (Textuals) |  |  |  |  |  |  |
Intercompany Item Eliminated in Consolidation |  | 2.0 |  | 2.0 |  |  |
Appalachian Power Co [Member] | Current Liabilities [Member] | Appalachian Consumer Rate Relief Funding [Member] |  |  |  |  |  |  |
Variable Interest Entities (Textuals) |  |  |  |  |  |  |
Securitization Bonds |  | 26.0 |  | 26.0 |  |  |
Appalachian Power Co [Member] | Noncurrent Liabilities [Member] | Appalachian Consumer Rate Relief Funding [Member] |  |  |  |  |  |  |
Variable Interest Entities (Textuals) |  |  |  |  |  |  |
Securitization Bonds |  | 147.0 |  | 173.0 |  |  |
Indiana Michigan Power Co [Member] |  |  |  |  |  |  |
ASSETS |  |  |  |  |  |  |
Current Assets |  | 571.8 |  | 439.4 |  |  |
Net Property, Plant and Equipment |  | 7,411.5 |  | 7,310.9 |  |  |
Other Noncurrent Assets |  | 4,135.6 |  | 4,657.9 |  |  |
Total Assets |  | 12,118.9 |  | 12,408.2 |  |  |
LIABILITIES AND EQUITY |  |  |  |  |  |  |
Current Liabilities |  | 1,197.1 |  | 894.0 |  |  |
Noncurrent Liabilities |  | 7,913.5 |  | 8,729.5 |  |  |
Equity |  | 3,008.3 |  | 2,784.7 |  | 2,749.2 | 2,544.4
Total Liabilities and Equity |  | 12,118.9 |  | 12,408.2 |  |  |
Variable Interest Entities (Textuals) |  |  |  |  |  |  |
Amount Of Power Purchased From OVEC |  | 59.7 |  | 52.2 |  | 47.2 |
Indiana Michigan Power Co [Member] | Unregulated Operation [Member] |  |  |  |  |  |  |
ASSETS |  |  |  |  |  |  |
Net Property, Plant and Equipment |  | 78.7 |  | 23.3 |  |  |
Indiana Michigan Power Co [Member] | DCC Fuel [Member] |  |  |  |  |  |  |
Variable Interest Entities (Textuals) |  |  |  |  |  |  |
Payments Made by I&M to DCC Fuel |  | $ 84.0 |  | 91.0 |  | 94.0 |
Capital Lease Term |  | 54 months |  |  |  |  |
Indiana Michigan Power Co [Member] | DCC Fuel [Member] | Variable Interest Entities [Member] |  |  |  |  |  |  |
ASSETS |  |  |  |  |  |  |
Current Assets |  | $ 90.2 |  | 65.2 |  |  |
Net Property, Plant and Equipment |  | 179.1 |  | 118.6 |  |  |
Other Noncurrent Assets |  | 94.0 |  | 57.2 |  |  |
Total Assets |  | 363.3 |  | 241.0 |  |  |
LIABILITIES AND EQUITY |  |  |  |  |  |  |
Current Liabilities |  | 90.0 |  | 65.1 |  |  |
Noncurrent Liabilities |  | 273.3 |  | 175.9 |  |  |
Equity |  | 0.0 |  | 0.0 |  |  |
Total Liabilities and Equity |  | $ 363.3 |  | 241.0 |  |  |
Indiana Michigan Power Co [Member] | Ohio Valley Electric Corporation [Member] |  |  |  |  |  |  |
Variable Interest Entities (Textuals) |  |  |  |  |  |  |
Power Participation Ratio |  | 7.85% |  |  |  |  |
Outstanding Indebtedness |  | $ 86.0 |  | 89.0 |  |  |
Indiana Michigan Power Co [Member] | Billings from AEP Service Corporation [Member] |  |  |  |  |  |  |
Variable Interest Entities (Textuals) |  |  |  |  |  |  |
Billings from VIE |  | 192.4 |  | 200.9 |  | 210.2 |
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 |  | 27.7 |  | 21.8 |  |  |
Maximum Exposure |  | 27.7 |  | 21.8 |  |  |
Indiana Michigan Power Co [Member] | Billings from AEP Generating Company [Member] |  |  |  |  |  |  |
Variable Interest Entities (Textuals) |  |  |  |  |  |  |
Billings from VIE |  | 242.0 |  | 218.0 |  | 173.0 |
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 |  | $ 17.0 |  | 18.0 |  |  |
Indiana Michigan Power Co [Member] | Rockport Generating Plant |  |  |  |  |  |  |
Variable Interest Entities (Textuals) |  |  |  |  |  |  |
Jointly Owned Utility Plant, Proportionate Ownership Share |  | 50.00% |  |  |  |  |
Indiana Michigan Power Co [Member] | Retained Earnings [Member] |  |  |  |  |  |  |
LIABILITIES AND EQUITY |  |  |  |  |  |  |
Equity |  | $ 1,963.2 |  | 1,748.5 |  | 1,718.7 | 1,518.5
Ohio Power Co [Member] |  |  |  |  |  |  |
ASSETS |  |  |  |  |  |  |
Current Assets |  | 414.4 |  | 327.5 |  |  |
Net Property, Plant and Equipment |  | 8,609.3 |  | 7,963.0 |  |  |
Other Noncurrent Assets |  | 979.4 |  | 975.3 |  |  |
Total Assets |  | 10,003.1 |  | 9,265.8 |  |  |
LIABILITIES AND EQUITY |  |  |  |  |  |  |
Current Liabilities |  | 1,635.5 |  | 1,245.7 |  |  |
Noncurrent Liabilities |  | 5,279.5 |  | 5,173.8 |  |  |
Equity |  | 3,088.1 |  | 2,846.3 |  | 2,692.7 | 2,508.5
Total Liabilities and Equity |  | 10,003.1 |  | 9,265.8 |  |  |
Variable Interest Entities (Textuals) |  |  |  |  |  |  |
Amount Of Power Purchased From OVEC |  | 151.8 |  | 133.0 |  | 120.8 |
Equity Method Investment Income |  | (0.6) |  | 0.0 |  | 0.0 |
Ohio Power Co [Member] | Unregulated Operation [Member] |  |  |  |  |  |  |
ASSETS |  |  |  |  |  |  |
Net Property, Plant and Equipment |  | $ 9.8 |  | 9.8 |  |  |
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 |  | $ 219.0 |  | 226.0 |  |  |
Ohio Power Co [Member] | Billings from AEP Service Corporation [Member] |  |  |  |  |  |  |
Variable Interest Entities (Textuals) |  |  |  |  |  |  |
Billings from VIE |  | 272.5 |  | 234.9 |  | 232.8 |
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 |  | 31.1 |  | 25.5 |  |  |
Maximum Exposure |  | 31.1 |  | 25.5 |  |  |
Ohio Power Co [Member] | Retained Earnings [Member] |  |  |  |  |  |  |
LIABILITIES AND EQUITY |  |  |  |  |  |  |
Equity |  | 1,929.1 |  | 1,686.3 |  | 1,532.7 | 1,348.5
Public Service Co Of Oklahoma [Member] |  |  |  |  |  |  |
ASSETS |  |  |  |  |  |  |
Current Assets |  | 491.5 |  | 386.8 |  |  |
Net Property, Plant and Equipment |  | 5,626.5 |  | 4,802.8 |  |  |
Other Noncurrent Assets |  | 847.9 |  | 1,209.4 |  |  |
Total Assets |  | 6,965.9 |  | 6,399.0 |  |  |
LIABILITIES AND EQUITY |  |  |  |  |  |  |
Current Liabilities |  | 842.7 |  | 562.7 |  |  |
Noncurrent Liabilities |  | 3,704.1 |  | 3,544.7 |  |  |
Equity |  | 2,419.1 |  | 2,291.6 |  | 1,545.6 | 1,373.3
Total Liabilities and Equity |  | 6,965.9 |  | 6,399.0 |  |  |
Public Service Co Of Oklahoma [Member] | Unregulated Operation [Member] |  |  |  |  |  |  |
ASSETS |  |  |  |  |  |  |
Net Property, Plant and Equipment |  | 5.0 |  | 5.3 |  |  |
Public Service Co Of Oklahoma [Member] | Billings from AEP Service Corporation [Member] |  |  |  |  |  |  |
Variable Interest Entities (Textuals) |  |  |  |  |  |  |
Billings from VIE |  | 142.3 |  | 123.7 |  | 113.2 |
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 |  | 17.7 |  | 13.7 |  |  |
Maximum Exposure |  | 17.7 |  | 13.7 |  |  |
Public Service Co Of Oklahoma [Member] | Retained Earnings [Member] |  |  |  |  |  |  |
LIABILITIES AND EQUITY |  |  |  |  |  |  |
Equity |  | 1,218.0 |  | 1,095.4 |  | 974.3 | 851.0
Southwestern Electric Power Co [Member] |  |  |  |  |  |  |
ASSETS |  |  |  |  |  |  |
Current Assets |  | 812.2 |  | 668.5 |  |  |
Net Property, Plant and Equipment |  | 8,262.2 |  | 7,400.1 |  |  |
Other Noncurrent Assets |  | 1,304.4 |  | 1,257.1 |  |  |
Total Assets |  | 10,378.8 |  | 9,325.7 |  |  |
LIABILITIES AND EQUITY |  |  |  |  |  |  |
Current Liabilities |  | 947.7 |  | 538.7 |  |  |
Noncurrent Liabilities |  | 5,756.3 |  | 5,637.2 |  |  |
Equity |  | 3,674.8 |  | 3,149.8 |  | 2,627.7 | 2,441.1
Total Liabilities and Equity |  | 10,378.8 |  | 9,325.7 |  |  |
Variable Interest Entities (Textuals) |  |  |  |  |  |  |
Equity Method Investment Income |  | (1.4) |  | (3.4) |  | (2.9) |
Southwestern Electric Power Co [Member] | Unregulated Operation [Member] |  |  |  |  |  |  |
ASSETS |  |  |  |  |  |  |
Net Property, Plant and Equipment |  | 9.3 |  | 53.9 |  |  |
Southwestern Electric Power Co [Member] | Sabine Mining Co [Member] |  |  |  |  |  |  |
Variable Interest Entities (Textuals) |  |  |  |  |  |  |
Billings from VIE |  | 168.0 |  | 162.0 |  | 131.0 |
Guarantees Of Mine Reclamation Amount |  | 155.0 |  |  |  |  |
Estimated Final Cost Mine Reclamation |  | 135.0 |  |  |  |  |
Amount Collected, Rider Mine Close Other Assets Noncurrent |  | 33.0 |  |  |  |  |
Amount Collected Through Rider For Final Mine Closure And Reclamation Costs |  | 89.0 |  |  |  |  |
Amount Collected, Rider Mine Close ARO Noncurrent |  | $ 122.0 |  |  |  |  |
Mine End-of-Life Date |  | 2023 |  |  |  |  |
Reclamation Complete Date |  | 2037 |  |  |  |  |
Southwestern Electric Power Co [Member] | Sabine Mining Co [Member] | Variable Interest Entities [Member] |  |  |  |  |  |  |
ASSETS |  |  |  |  |  |  |
Current Assets |  | $ 108.3 |  | 77.2 |  |  |
Net Property, Plant and Equipment |  | 7.2 |  | 51.8 |  |  |
Other Noncurrent Assets |  | 130.0 |  | 104.1 |  |  |
Total Assets |  | 245.5 |  | 233.1 |  |  |
LIABILITIES AND EQUITY |  |  |  |  |  |  |
Current Liabilities |  | 25.4 |  | 18.9 |  |  |
Noncurrent Liabilities |  | 219.4 |  | 214.3 |  |  |
Equity |  | 0.7 |  | (0.1) |  |  |
Total Liabilities and Equity |  | $ 245.5 |  | 233.1 |  |  |
Southwestern Electric Power Co [Member] | Dolet Hills Lignite Co, LLC [Member] |  |  |  |  |  |  |
Variable Interest Entities (Textuals) |  |  |  |  |  |  |
Billings from VIE |  |  |  | 47.0 |  | 142.0 |
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 |  | $ (1.4) |  | (3.4) |  | (2.9) |
Dividends |  | 25.0 |  | 0.0 |  | 0.0 |
Southwestern Electric Power Co [Member] | Billings from AEP Service Corporation [Member] |  |  |  |  |  |  |
Variable Interest Entities (Textuals) |  |  |  |  |  |  |
Billings from VIE |  | 192.5 |  | 168.6 |  | 161.8 |
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 |  | 23.8 |  | 20.5 |  |  |
Maximum Exposure |  | 23.8 |  | 20.5 |  |  |
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 |  | 7.6 |  | 7.6 |  |  |
Maximum Exposure |  | 7.6 |  | 7.6 |  |  |
Southwestern Electric Power Co [Member] | Retained Earnings [Member] |  |  |  |  |  |  |
LIABILITIES AND EQUITY |  |  |  |  |  |  |
Equity |  | 2,236.0 |  | 2,050.9 |  | 1,811.9 | 1,629.5
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 |  | 0.4 |  | 23.8 |  |  |
Maximum Exposure |  | 0.4 |  | 23.8 |  |  |
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 |  | 0.0 |  |  |
Maximum Exposure |  | 36.8 |  | 50.3 |  |  |
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 |  | 8.0 |  | 31.4 |  |  |
Maximum Exposure |  | $ 44.8 |  | 81.7 |  |  |
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 |  | $ 446.9 |  | 347.2 |  |  |
Net Property, Plant and Equipment |  | 11,681.6 |  | 10,635.4 |  |  |
Other Noncurrent Assets |  | 763.7 |  | 854.1 |  |  |
Total Assets |  | 12,892.2 |  | 11,836.7 |  |  |
LIABILITIES AND EQUITY |  |  |  |  |  |  |
Current Liabilities |  | 1,043.8 |  | 1,311.7 |  |  |
Noncurrent Liabilities |  | 7,944.1 |  | 6,930.8 |  |  |
Equity |  | 3,904.3 |  | 3,594.2 |  | 3,206.0 | 2,961.1
Total Liabilities and Equity |  | 12,892.2 |  | 11,836.7 |  |  |
Variable Interest Entities (Textuals) |  |  |  |  |  |  |
Securitization Bonds |  | 314.4 |  | 404.7 |  |  |
Securitized Assets |  | 286.4 |  | 367.6 |  |  |
AEP Texas Inc. [Member] | Unregulated Operation [Member] |  |  |  |  |  |  |
ASSETS |  |  |  |  |  |  |
Net Property, Plant and Equipment |  | 1.2 |  | 1.2 |  |  |
AEP Texas Inc. [Member] | AEP Texas Central Transition Funding Co [Member] |  |  |  |  |  |  |
Variable Interest Entities (Textuals) |  |  |  |  |  |  |
Securitized Assets |  | 125.0 |  | 184.0 |  |  |
AEP Texas Inc. [Member] | AEP Texas Central Transition Funding Co [Member] | Variable Interest Entities [Member] |  |  |  |  |  |  |
ASSETS |  |  |  |  |  |  |
Current Assets |  | 27.0 |  | 24.9 |  |  |
Net Property, Plant and Equipment |  | 0.0 |  | 0.0 |  |  |
Other Noncurrent Assets |  | 140.9 | [4] | 208.3 | [5] |  |
Total Assets |  | 167.9 |  | 233.2 |  |  |
LIABILITIES AND EQUITY |  |  |  |  |  |  |
Current Liabilities |  | 73.2 |  | 71.2 |  |  |
Noncurrent Liabilities |  | 90.4 |  | 157.8 |  |  |
Equity |  | 4.3 |  | 4.2 |  |  |
Total Liabilities and Equity |  | 167.9 |  | 233.2 |  |  |
AEP Texas Inc. [Member] | Restoration Funding [Member] |  |  |  |  |  |  |
Variable Interest Entities (Textuals) |  |  |  |  |  |  |
Securitized Assets |  | 161.0 |  | 183.0 |  |  |
AEP Texas Inc. [Member] | Restoration Funding [Member] | Variable Interest Entities [Member] |  |  |  |  |  |  |
ASSETS |  |  |  |  |  |  |
Current Assets |  | 21.1 |  | 24.3 |  |  |
Net Property, Plant and Equipment |  | 0.0 |  | 0.0 |  |  |
Other Noncurrent Assets |  | 168.8 | [6] | 192.6 | [7] |  |
Total Assets |  | 189.9 |  | 216.9 |  |  |
LIABILITIES AND EQUITY |  |  |  |  |  |  |
Current Liabilities |  | 31.3 |  | 36.1 |  |  |
Noncurrent Liabilities |  | 157.4 |  | 179.6 |  |  |
Equity |  | 1.2 |  | 1.2 |  |  |
Total Liabilities and Equity |  | 189.9 |  | 216.9 |  |  |
AEP Texas Inc. [Member] | Billings from AEP Service Corporation [Member] |  |  |  |  |  |  |
Variable Interest Entities (Textuals) |  |  |  |  |  |  |
Billings from VIE |  | 236.8 |  | 206.9 |  | 199.4 |
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 |  | 27.8 |  | 22.2 |  |  |
Maximum Exposure |  | 27.8 |  | 22.2 |  |  |
AEP Texas Inc. [Member] | Retained Earnings [Member] |  |  |  |  |  |  |
LIABILITIES AND EQUITY |  |  |  |  |  |  |
Equity |  | 2,354.7 |  | 2,046.8 |  | 1,757.0 | $ 1,516.0
AEP Texas Inc. [Member] | Other Noncurrent Assets [Member] | AEP Texas Central Transition Funding Co [Member] |  |  |  |  |  |  |
Variable Interest Entities (Textuals) |  |  |  |  |  |  |
Intercompany Item Eliminated in Consolidation |  | 16.0 |  | 24.0 |  |  |
AEP Texas Inc. [Member] | Other Noncurrent Assets [Member] | Restoration Funding [Member] |  |  |  |  |  |  |
Variable Interest Entities (Textuals) |  |  |  |  |  |  |
Intercompany Item Eliminated in Consolidation |  | 7.0 |  | 8.0 |  |  |
AEP Texas Inc. [Member] | Current Liabilities [Member] | AEP Texas Central Transition Funding Co [Member] |  |  |  |  |  |  |
Variable Interest Entities (Textuals) |  |  |  |  |  |  |
Securitization Bonds |  | 70.0 |  | 68.0 |  |  |
AEP Texas Inc. [Member] | Current Liabilities [Member] | Restoration Funding [Member] |  |  |  |  |  |  |
Variable Interest Entities (Textuals) |  |  |  |  |  |  |
Securitization Bonds |  | 24.0 |  | 23.0 |  |  |
AEP Texas Inc. [Member] | Noncurrent Liabilities [Member] | AEP Texas Central Transition Funding Co [Member] |  |  |  |  |  |  |
Variable Interest Entities (Textuals) |  |  |  |  |  |  |
Securitization Bonds |  | 71.0 |  | 141.0 |  |  |
AEP Texas Inc. [Member] | Noncurrent Liabilities [Member] | Restoration Funding [Member] |  |  |  |  |  |  |
Variable Interest Entities (Textuals) |  |  |  |  |  |  |
Securitization Bonds |  | $ 150.0 |  | 173.0 |  |  |
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 Investment, Ownership Percentage |  | 50.00% |  |  |  |  |
Production Tax Credits |  | $ 39.0 |  | 33.0 |  | 36.0 |
Equity Method Investments |  | 247.0 |  | 399.0 |  |  |
Equity Method Investment Income |  | 194.0 |  | 12.0 |  | (2.0) |
Equity Method Investment, Difference Between Carrying Amount and Underlying Equity |  | $ 62.0 |  | (3.0) |  |  |
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] |  |  |  |  |  |  |
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 |  | $ 762.0 |  | 733.0 |  |  |
Equity Method Investment Income |  | $ (74.0) |  | $ (66.0) |  | $ (68.0) |
[1] | Based on the Registrants’ power participation ratios APCo, I&M and OPCo’s share of OVEC debt was $173 million, $86 million and $219 million as of December 31, 2022 and $177 million, $89 million and $226 million as of December 31, 2021, 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 $16 million.
[5] | Includes an intercompany item eliminated in consolidation of $24 million.
[6] | Includes an intercompany item eliminated in consolidation of $7 million.
[7] | Includes an intercompany item eliminated in consolidation of $8 million.

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