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v3.23.1

Acquisitions, Assets and Liabilities Held for Sale, Dispositions and Impairments (Details) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2022 USD ($) MW | Sep. 30, 2022 USD ($) | Jun. 30, 2022 USD ($) | Jun. 30, 2020 USD ($) | Dec. 31, 2022 USD ($) MW | Dec. 31, 2021 USD ($) | Dec. 31, 2020 USD ($)
Utilities Operating Expense, Operations |  |  |  |  |  | $ 2,878,100,000 | $ 2,547,700,000 | $ 2,572,400,000
Additional Paid in Capital |  | $ 8,051,000,000 |  |  |  | 8,051,000,000 | 7,172,600,000 |
Asset Retirement Obligation, Liabilities Settled | [1],[2],[3],[4],[5],[6] |  |  |  |  | 47,000,000.0 | 41,400,000 |
Property, Plant and Equipment, Generation |  | 25,834,200,000 |  |  |  | 25,834,200,000 | 24,319,600,000 |
Obligations Under Operating Leases |  | $ 552,500,000 |  |  |  | 552,500,000 | 501,400,000 |
Proceeds from Sale of Property, Plant, and Equipment |  |  |  |  |  | $ (218,000,000.0) | (118,900,000) | 71,100,000
Equity Method Investment, Ownership Percentage |  | 50.00% |  |  |  | 50.00% |  |
Deferred Tax Assets |  | $ 3,567,400,000 |  |  |  | $ 3,567,400,000 | 3,347,100,000 |
Depreciation and Amortization of Property, Plant and Equipment |  |  |  |  |  | 3,072,800,000 | 2,717,100,000 | 2,487,500,000
Asset Impairments and Other Related Charges |  |  |  |  |  | $ 48,800,000 | 11,600,000 | 0
BP Wind Energy [Member] |  |  |  |  |  |  |  |
Equity Method Investment, Ownership Percentage |  | 50.00% |  |  |  | 50.00% |  |
North Central Wind Energy Facilities |  |  |  |  |  |  |  |
Payments to Acquire Property, Plant, and Equipment |  |  |  |  |  | $ 1,207,300,000 | 652,800,000 | 0
Dry Lake Solar Project [Member] |  |  |  |  |  |  |  |
Payments to Acquire Property, Plant, and Equipment |  |  |  |  |  | 0 | 114,400,000 | 0
Vertically Integrated Utilities [Member] |  |  |  |  |  |  |  |
Enterprise Value |  | $ 2,850,000,000 |  |  |  | 2,850,000,000 |  |
Pretax Reduction in Investment Basis |  |  |  |  |  |  | 363,000,000 |
Asset Impairments and Other Related Charges |  |  |  |  |  | 24,900,000 | 11,600,000 |
Vertically Integrated Utilities [Member] | Proceeds for KY Operations |  |  |  |  |  |  |  |
Enterprise Value |  | 2,646,000,000 |  |  |  | $ 2,646,000,000 |  |
Vertically Integrated Utilities [Member] | Sundance [Member] |  |  |  |  |  |  |  |
WindGenerationMWs | MW |  |  |  |  |  | 199 |  |
Vertically Integrated Utilities [Member] | Maverick [Member] |  |  |  |  |  |  |  |
WindGenerationMWs | MW |  |  |  |  |  | 287 |  |
Vertically Integrated Utilities [Member] | Traverse [Member] |  |  |  |  |  |  |  |
WindGenerationMWs | MW |  |  |  |  |  | 998 |  |
Vertically Integrated Utilities [Member] | Kentucky Power Company and Kentucky Transmission Company |  |  |  |  |  |  |  |
Deferred Tax Assets |  | $ 66,100,000 |  |  |  | $ 66,100,000 |  |
Vertically Integrated Utilities [Member] | North Central Wind Energy Facilities | Maverick [Member] |  |  |  |  |  |  |  |
Payments to Acquire Property, Plant, and Equipment |  |  |  |  |  | 383,000,000 |  |
Vertically Integrated Utilities [Member] | North Central Wind Energy Facilities | Traverse [Member] |  |  |  |  |  |  |  |
Payments to Acquire Property, Plant, and Equipment |  |  |  |  |  | 1,200,000,000 |  |
Generation and Marketing [Member] |  |  |  |  |  |  |  |
Asset Impairments and Other Related Charges |  |  |  |  |  | $ 0 | 0 |
Generation and Marketing [Member] | BP Wind Energy [Member] |  |  |  |  |  |  |  |
Equity Method Investment, Other than Temporary Impairment |  |  | $ 2,000,000 | $ 186,000,000 |  |  |  |
Equity Method Investment, Ownership Percentage |  | 50.00% |  |  |  | 50.00% |  |
Generation and Marketing [Member] | Proceeds of Mineral Rights Sale |  |  |  |  |  |  |  |
Proceeds from Sale of Property, Plant, and Equipment |  |  |  |  |  | $ 120,000,000 |  |
Gain (Loss) on Disposition of Other Assets |  |  |  |  |  | 116,000,000 |  |
Generation and Marketing [Member] | Dry Lake Solar Project [Member] |  |  |  |  |  |  |  |
Payments to Acquire Property, Plant, and Equipment |  |  |  |  |  | 114,000,000 |  |
Generation and Marketing [Member] | Dry Lake Solar Project [Member] | Payment When Put in Service |  |  |  |  |  |  |  |
Payments to Acquire Property, Plant, and Equipment |  |  |  |  |  | 11,000,000 |  |
Generation and Marketing [Member] | Dry Lake Solar Project [Member] | Payment at Closing |  |  |  |  |  |  |  |
Payments to Acquire Property, Plant, and Equipment |  |  |  |  |  | 103,000,000 |  |
Transmission and Distribution Companies [Member] |  |  |  |  |  |  |  |
Asset Impairments and Other Related Charges |  |  |  |  |  | 0 | 0 |
AEP Transmission Holdco |  |  |  |  |  |  |  |
Enterprise Value |  | $ 2,850,000,000 |  |  |  | 2,850,000,000 |  |
Asset Impairments and Other Related Charges |  |  |  |  |  | 0 | 0 |
AEP Transmission Holdco | Proceeds for KY Operations |  |  |  |  |  |  |  |
Enterprise Value |  | 2,646,000,000 |  |  |  | 2,646,000,000 |  |
AEP Texas Inc. [Member] |  |  |  |  |  |  |  |
Utilities Operating Expense, Operations |  |  |  |  |  | 594,200,000 | 489,500,000 | 488,900,000
Additional Paid in Capital |  | 1,558,200,000 |  |  |  | 1,558,200,000 | 1,553,900,000 |
Asset Retirement Obligation, Liabilities Settled | [2],[3] |  |  |  |  | 200,000 | 400,000 |
Obligations Under Operating Leases |  | 67,800,000 |  |  |  | 67,800,000 | 61,300,000 |
Deferred Tax Assets |  | 177,000,000.0 |  |  |  | 177,000,000.0 | 173,800,000 |
Depreciation and Amortization of Property, Plant and Equipment |  |  |  |  |  | 363,500,000 | 327,200,000 | 364,200,000
AEP Transmission Co [Member] |  |  |  |  |  |  |  |
Utilities Operating Expense, Operations |  |  |  |  |  | 136,300,000 | 105,500,000 | 99,800,000
Payments to Acquire Property, Plant, and Equipment |  |  |  |  |  | 9,800,000 | 17,900,000 | 6,000,000.0
Obligations Under Operating Leases |  | 1,500,000 |  |  |  | 1,500,000 | 1,300,000 |
Deferred Tax Assets |  | 165,000,000.0 |  |  |  | 165,000,000.0 | 161,200,000 |
Depreciation and Amortization of Property, Plant and Equipment |  |  |  |  |  | 346,200,000 | 297,300,000 | 249,000,000.0
AEP Transmission Co [Member] | AEP Transmission Holdco |  |  |  |  |  |  |  |
Depreciation and Amortization of Property, Plant and Equipment |  |  |  |  |  | 4,000,000 |  |
Appalachian Power Co [Member] |  |  |  |  |  |  |  |
Utilities Operating Expense, Operations |  |  |  |  |  | 724,100,000 | 610,000,000.0 | 530,500,000
Additional Paid in Capital |  | 1,828,700,000 |  |  |  | 1,828,700,000 | 1,828,700,000 |
Asset Retirement Obligation, Liabilities Settled | [2],[3] |  |  |  |  | 12,700,000 | 6,900,000 |
Property, Plant and Equipment, Generation |  | 6,776,800,000 |  |  |  | 6,776,800,000 | 6,683,900,000 |
Obligations Under Operating Leases |  | 59,100,000 |  |  |  | 59,100,000 | 52,400,000 |
Deferred Tax Assets |  | 510,300,000 |  |  |  | 510,300,000 | 495,100,000 |
Depreciation and Amortization of Property, Plant and Equipment |  |  |  |  |  | 576,100,000 | 547,000,000.0 | 507,800,000
Asset Impairments and Other Related Charges |  |  |  |  |  | 24,900,000 | 0 | 0
Indiana Michigan Power Co [Member] |  |  |  |  |  |  |  |
Cost of Purchased Power from Affiliate |  |  |  |  |  | 241,800,000 | 217,900,000 | 172,800,000
Utilities Operating Expense, Operations |  |  |  |  |  | 621,000,000.0 | 645,200,000 | 650,000,000.0
Additional Paid in Capital |  | 988,800,000 |  |  |  | 988,800,000 | 980,900,000 |
Asset Retirement Obligation, Liabilities Settled | [2],[3],[4] |  |  |  |  | 600,000 | 100,000 |
Property, Plant and Equipment, Generation |  | 5,585,100,000 |  |  |  | 5,585,100,000 | 5,531,800,000 |
Obligations Under Operating Leases |  | 48,900,000 |  |  |  | 48,900,000 | 48,900,000 |
Deferred Tax Assets |  | 933,700,000 |  |  |  | 933,700,000 | 1,072,200,000 |
Depreciation and Amortization of Property, Plant and Equipment |  |  |  |  |  | 511,900,000 | 424,900,000 | 393,300,000
Ohio Power Co [Member] |  |  |  |  |  |  |  |
Cost of Purchased Power from Affiliate |  |  |  |  |  | 9,800,000 | 51,900,000 | 119,700,000
Utilities Operating Expense, Operations |  |  |  |  |  | 982,000,000.0 | 836,800,000 | 822,600,000
Additional Paid in Capital |  | 837,800,000 |  |  |  | 837,800,000 | 838,800,000 |
Asset Retirement Obligation, Liabilities Settled | [2] |  |  |  |  | 100,000 | 100,000 |
Obligations Under Operating Leases |  | 60,300,000 |  |  |  | 60,300,000 | 68,600,000 |
Deferred Tax Assets |  | 218,800,000 |  |  |  | 218,800,000 | 204,400,000 |
Depreciation and Amortization of Property, Plant and Equipment |  |  |  |  |  | 293,100,000 | 301,100,000 | 275,000,000.0
Public Service Co Of Oklahoma [Member] |  |  |  |  |  |  |  |
Utilities Operating Expense, Operations |  |  |  |  |  | 400,400,000 | 353,800,000 | 327,300,000
Additional Paid in Capital |  | 1,042,600,000 |  |  |  | 1,042,600,000 | 1,039,000,000 |
Asset Retirement Obligation, Liabilities Settled | [2],[3],[6] |  |  |  |  | 700,000 | 700,000 |
Payments to Acquire Property, Plant, and Equipment |  |  |  |  |  | (549,300,000) | (297,000,000.0) | 0
Property, Plant and Equipment, Generation |  | 2,394,800,000 |  |  |  | 2,394,800,000 | 1,802,400,000 |
Obligations Under Operating Leases |  | 99,300,000 |  |  |  | 99,300,000 | 62,200,000 |
Deferred Tax Assets |  | 225,000,000.0 |  |  |  | 225,000,000.0 | 170,000,000.0 |
Depreciation and Amortization of Property, Plant and Equipment |  |  |  |  |  | 226,200,000 | 185,900,000 | 171,900,000
Southwestern Electric Power Co [Member] |  |  |  |  |  |  |  |
Utilities Operating Expense, Operations |  |  |  |  |  | 424,700,000 | 360,300,000 | 338,300,000
Additional Paid in Capital |  | 1,442,200,000 |  |  |  | 1,442,200,000 | 1,092,200,000 |
Asset Retirement Obligation, Liabilities Settled | [1],[2],[3],[6] |  |  |  |  | 25,800,000 | 20,900,000 |
Property, Plant and Equipment, Generation |  | 5,476,200,000 |  |  |  | 5,476,200,000 | 4,734,500,000 |
Obligations Under Operating Leases |  | 120,200,000 |  |  |  | 120,200,000 | 77,700,000 |
Deferred Tax Assets |  | 374,900,000 |  |  |  | 374,900,000 | 336,400,000 |
Depreciation and Amortization of Property, Plant and Equipment |  |  |  |  |  | 319,300,000 | 292,900,000 | 271,200,000
Asset Impairments and Other Related Charges |  |  |  |  |  | 0 | 11,600,000 | 0
Southwestern Electric Power Co [Member] | North Central Wind Energy Facilities |  |  |  |  |  |  |  |
Payments to Acquire Property, Plant, and Equipment |  |  |  |  |  | 658,000,000.0 | 355,800,000 | 0
Southwestern Electric Power Co [Member] | Vertically Integrated Utilities [Member] | Dolet Hills Power Station [Member] |  |  |  |  |  |  |  |
Asset Impairments and Other Related Charges |  |  |  |  |  | 12,000,000 |  |
Kentucky Power Co [Member] | Vertically Integrated Utilities [Member] |  |  |  |  |  |  |  |
Gain (Loss) on Disposition of Business |  | 100,000,000 | 194,000,000 | $ 69,000,000 |  | 363,000,000 |  |
Gain (Loss) on Disposition of Business net of Tax |  | 79,000,000 | $ 149,000,000 |  |  | 297,000,000 |  |
Depreciation and Amortization of Property, Plant and Equipment |  |  |  |  |  | 99,000,000 |  |
Conesville Generating Station (Unit No. 4) [Member] | Generation and Marketing [Member] |  |  |  |  |  |  |  |
Payments for (Proceeds from) Removal Costs |  |  |  |  | $ 26,000,000 |  | 98,000,000 |
Asset Retirement Obligation, Liabilities Settled |  |  |  |  |  |  | 106,000,000 |
Payments for Removal Costs |  |  |  |  |  |  | 72,000,000 |
Trent and Desert Sky Wind Farms [Member] | Generation and Marketing [Member] |  |  |  |  |  |  |  |
Additional Paid in Capital |  | $ 6,000,000 |  |  |  | $ 6,000,000 |  |
Mitchell Power Plant |  |  |  |  |  |  |  |
Approximate OVEC Generating Capacity (MWs) | MW |  | 1,560 |  |  |  | 1,560 |  |
NBV Mitchell Including CWIP and Inventory |  | $ 577,000,000 |  |  |  | $ 577,000,000 | 586,000,000 |
Mitchell Power Plant | Kentucky Power Co [Member] |  |  |  |  |  |  |  |
Ownership Interest in Mitchell Power Plant |  | 50.00% |  |  |  | 50.00% |  |
Mitchell Power Plant | Wheeling Power Company |  |  |  |  |  |  |  |
Ownership Interest in Mitchell Power Plant |  | 50.00% |  |  |  | 50.00% |  |
Cardinal Power Plant | Generation and Marketing [Member] |  |  |  |  |  |  |  |
Approximate OVEC Generating Capacity (MWs) | MW |  | 595 |  |  |  | 595 |  |
AEP Wind Holdings LLC [Member] | Generation and Marketing [Member] |  |  |  |  |  |  |  |
Guarantor Obligations, Current Carrying Value |  | $ 5,000,000 |  |  |  | $ 5,000,000 |  |
AEP Wind Holdings LLC [Member] | Indiana Michigan Power Co [Member] | Generation and Marketing [Member] |  |  |  |  |  |  |  |
Cost of Purchased Power from Affiliate |  |  |  |  |  | 12,000,000 | 10,000,000 | 11,000,000
AEP Wind Holdings LLC [Member] | Ohio Power Co [Member] | Generation and Marketing [Member] |  |  |  |  |  |  |  |
Cost of Purchased Power from Affiliate |  |  |  |  |  | 24,000,000 | 20,000,000 | 23,000,000
AEP Wind Holdings LLC [Member] | Southwestern Electric Power Co [Member] | Generation and Marketing [Member] |  |  |  |  |  |  |  |
Cost of Purchased Power from Affiliate |  |  |  |  |  | $ 14,000,000 | 14,000,000 | 14,000,000
Santa Rita East [Member] |  |  |  |  |  |  |  |
Noncash or Part Noncash Acquisition, Other Assets Acquired |  |  |  |  |  |  | 18,900,000 | (43,700,000)
Santa Rita East [Member] | Noncontrolling Interests [Member] |  |  |  |  |  |  |  |
Noncash or Part Noncash Acquisition, Other Assets Acquired |  |  |  |  |  |  | 18,900,000 | $ (43,700,000)
Santa Rita East [Member] | Generation and Marketing [Member] |  |  |  |  |  |  |  |
Noncash Contribution of Assets by Noncontrolling Interest |  |  |  |  |  |  | 44,000,000 |
Percentage of an Asset Acquired |  | 85.00% |  |  |  | 85.00% |  | 10.00%
WindGenerationMWs | MW |  |  |  |  |  | 302 |  |
Payments to Acquire Businesses, Gross |  |  |  |  |  |  | 44,000,000 |
Dry Lake Solar Project [Member] |  |  |  |  |  |  |  |
Percentage of an Asset Acquired |  | 75.00% |  |  |  | 75.00% |  |
Dry Lake Solar Project [Member] | Generation and Marketing [Member] |  |  |  |  |  |  |  |
Solar Generation MWs | MW |  |  |  |  |  | 100 |  |
North Central Wind Energy Facilities |  |  |  |  |  |  |  |
Payments to Acquire Property, Plant, and Equipment |  |  |  |  |  | $ 2,000,000,000 |  |
North Central Wind Energy Facilities | Vertically Integrated Utilities [Member] |  |  |  |  |  |  |  |
WindGenerationMWs | MW |  |  |  |  |  | 1,484 |  |
North Central Wind Energy Facilities | Vertically Integrated Utilities [Member] | Sundance [Member] |  |  |  |  |  |  |  |
Payments to Acquire Property, Plant, and Equipment |  |  |  |  |  | $ 270,000,000 |  |
North Central Wind Energy Facilities | Public Service Co Of Oklahoma [Member] |  |  |  |  |  |  |  |
Percentage of an Asset Acquired |  | 45.50% |  |  |  | 45.50% |  |
North Central Wind Energy Facilities | Public Service Co Of Oklahoma [Member] | Vertically Integrated Utilities [Member] |  |  |  |  |  |  |  |
Property, Plant and Equipment, Generation |  | $ 901,000,000 |  |  |  | $ 901,000,000 | 316,000,000 |
Obligations Under Operating Leases |  | 70,400,000 |  |  |  | 70,400,000 | 30,600,000 |
North Central Wind Energy Facilities | Public Service Co Of Oklahoma [Member] | Vertically Integrated Utilities [Member] | Sundance [Member] |  |  |  |  |  |  |  |
Obligations Under Operating Leases |  | 12,600,000 |  |  |  | 12,600,000 | 12,600,000 |
North Central Wind Energy Facilities | Public Service Co Of Oklahoma [Member] | Vertically Integrated Utilities [Member] | Maverick [Member] |  |  |  |  |  |  |  |
Obligations Under Operating Leases |  | 18,000,000.0 |  |  |  | 18,000,000.0 | 18,000,000.0 |
North Central Wind Energy Facilities | Public Service Co Of Oklahoma [Member] | Vertically Integrated Utilities [Member] | Traverse [Member] |  |  |  |  |  |  |  |
Obligations Under Operating Leases |  | $ 39,800,000 |  |  |  | $ 39,800,000 | 0 |
North Central Wind Energy Facilities | Southwestern Electric Power Co [Member] |  |  |  |  |  |  |  |
Percentage of an Asset Acquired |  | 54.50% |  |  |  | 54.50% |  |
North Central Wind Energy Facilities | Southwestern Electric Power Co [Member] | Vertically Integrated Utilities [Member] |  |  |  |  |  |  |  |
Property, Plant and Equipment, Generation |  | $ 1,100,000,000 |  |  |  | $ 1,100,000,000 | 378,000,000 |
Obligations Under Operating Leases |  | 84,400,000 |  |  |  | 84,400,000 | 36,700,000 |
North Central Wind Energy Facilities | Southwestern Electric Power Co [Member] | Vertically Integrated Utilities [Member] | Sundance [Member] |  |  |  |  |  |  |  |
Obligations Under Operating Leases |  | 15,100,000 |  |  |  | 15,100,000 | 15,100,000 |
North Central Wind Energy Facilities | Southwestern Electric Power Co [Member] | Vertically Integrated Utilities [Member] | Maverick [Member] |  |  |  |  |  |  |  |
Obligations Under Operating Leases |  | 21,600,000 |  |  |  | 21,600,000 | 21,600,000 |
North Central Wind Energy Facilities | Southwestern Electric Power Co [Member] | Vertically Integrated Utilities [Member] | Traverse [Member] |  |  |  |  |  |  |  |
Obligations Under Operating Leases |  | 47,700,000 |  |  |  | 47,700,000 | 0 |
Trent and Desert Sky Wind Farms [Member] | Generation and Marketing [Member] |  |  |  |  |  |  |  |
Payments to Acquire Businesses, Gross |  |  |  |  |  | 57,000,000 |  |
Redeemable Noncontrolling Interest |  | $ 63,000,000 |  |  |  | 63,000,000 |  |
Noncontrolling Interests [Member] | Dry Lake Solar Project [Member] |  |  |  |  |  |  |  |
Noncash Contribution of Assets by Noncontrolling Interest |  |  |  |  |  | $ 0 | $ 35,300,000 | $ 0
[1] | Includes ARO related to Sabine and DHLC.
[2] | Includes ARO related to asbestos removal.
[3] | Includes ARO related to ash disposal facilities.
[4] | Includes ARO related to nuclear decommissioning costs for the Cook Plant of $2 billion and $1.93 billion as of December 31, 2022 and 2021, respectively.
[5] | Includes ARO related to solar farms.
[6] | Includes ARO related to wind farms.

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