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v3.23.1

Business Segments (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Reportable Segment Information |  |  |  |  |  |  |
Revenue from Contracts with Customers |  | $ 19,639.5 |  | $ 16,792.0 |  | $ 14,918.5 |
Sales to AEP Affiliates |  | 0.0 |  | 0.0 |  | 0.0 |
Total Revenues |  | 19,639.5 |  | 16,792.0 |  | 14,918.5 |
Loss on the Expected Sale of KPCo |  | 363.3 |  |  |  |  |
Asset Impairments and Other Related Charges |  | 48.8 |  | 11.6 |  | 0.0 |
Establishment of 2017-2019 Virginia Triennial Review Regulatory Asset |  | (37.0) |  | 0.0 |  | 0.0 |
Gain (Loss) on Disposition of Assets |  | (116.3) |  |  |  |  |
Utilities Operating Expense, Depreciation and Amortization |  | 3,202.8 |  | 2,825.7 |  | 2,682.8 |
Allowance for Equity Funds Used During Construction |  | 133.7 |  | 139.7 |  | 148.1 |
Interest Expense |  | 1,396.1 |  | 1,199.1 |  | 1,165.7 |
Income Tax Expense/Benefit |  | 5.4 |  | 115.5 |  | 40.5 |
Equity Earnings (Loss) of Unconsolidated Subsidiaries |  | (109.4) |  | 91.7 |  | 91.1 |
Net Income (Loss) |  | 2,305.6 |  | 2,488.1 |  | 2,196.7 |
Gross Property Additions |  | 7,879.0 |  | 6,426.8 |  | 6,246.3 |
Balance Sheet Information |  |  |  |  |  |  |
Property, Plant and Equipment, Gross, Period Increase (Decrease) |  | 97,021.4 |  | 90,225.0 |  |  |
Accumulated Depreciation and Amortization |  | 23,682.3 |  | 21,920.9 |  |  |
TOTAL PROPERTY, PLANT AND EQUIPMENT - NET |  | 73,339.1 |  | 68,304.1 |  |  |
Total Assets |  | 93,403.3 |  | 87,668.7 |  |  |
Investments in Equity Method Investees |  | 1,276.7 |  | 1,447.5 |  | 1,406.3 |
Long-term Debt Due Within One Year |  | 2,486.4 |  | 2,353.8 |  |  |
Long-term Debt |  | 34,314.6 |  | 32,203.8 |  |  |
Total Long-term Debt Outstanding |  | 36,801.0 |  | 34,557.6 |  |  |
AEP Transmission Co [Member] |  |  |  |  |  |  |
Reportable Segment Information |  |  |  |  |  |  |
Revenue from Contracts with Customers |  | 1,651.7 |  | 1,410.9 |  | 1,232.7 |
Revenues from Related Parties, Net of Provisions for Refund |  | 1,283.8 |  | 1,153.9 |  | 896.3 |
Sales to AEP Affiliates |  | 1,354.5 |  | 1,171.5 |  | 954.6 |
Total Revenues |  | 1,624.5 |  | 1,469.3 |  | 1,145.7 |
Utilities Operating Expense, Depreciation and Amortization |  | 346.2 |  | 297.3 |  | 249.0 |
Interest Income |  | 1.6 |  | 0.5 |  | 2.4 |
Allowance for Equity Funds Used During Construction |  | 70.7 |  | 67.2 |  | 74.0 |
Interest Expense |  | 162.7 |  | 141.2 |  | 127.8 |
Income Tax Expense/Benefit |  | 169.1 |  | 144.1 |  | 106.7 |
Net Income (Loss) |  | 594.2 |  | 591.7 |  | 423.4 |
Gross Property Additions |  | 1,468.3 |  | 1,442.7 |  | 1,621.9 |
Balance Sheet Information |  |  |  |  |  |  |
Property, Plant and Equipment, Gross, Period Increase (Decrease) |  | 14,366.9 |  | 12,885.1 |  |  |
Accumulated Depreciation and Amortization |  | 1,027.0 |  | 784.1 |  |  |
TOTAL PROPERTY, PLANT AND EQUIPMENT - NET |  | 13,339.9 |  | 12,101.0 |  |  |
Total Assets |  | 13,814.2 |  | 12,524.4 |  |  |
Long-term Debt Due Within One Year |  | 60.0 |  | 104.0 |  |  |
Long-term Debt |  | 4,722.8 |  | 4,239.9 |  |  |
Total Long-term Debt Outstanding |  | 4,782.8 |  | 4,343.9 |  |  |
Vertically Integrated Utilities [Member] |  |  |  |  |  |  |
Reportable Segment Information |  |  |  |  |  |  |
Revenue from Contracts with Customers |  | 11,292.8 |  | 9,852.2 |  | 8,753.2 |
Transmission and Distribution Utilities Revenues [Member] |  |  |  |  |  |  |
Reportable Segment Information |  |  |  |  |  |  |
Revenue from Contracts with Customers |  | 5,489.6 |  | 4,464.1 |  | 4,238.7 |
Transmission [Member] | AEP Transmission Co [Member] |  |  |  |  |  |  |
Reportable Segment Information |  |  |  |  |  |  |
Revenue from Contracts with Customers |  | 354.9 |  | 317.8 |  | 265.4 |
Balance Sheet Information |  |  |  |  |  |  |
Revenue from Contract with Customers, Net of Provisions for Refund, Including Assessed Tax |  | 340.9 |  | 315.1 |  | 248.8 |
Generation and Marketing Revenues [Member] |  |  |  |  |  |  |
Reportable Segment Information |  |  |  |  |  |  |
Revenue from Contracts with Customers |  | 2,448.9 |  | 2,108.3 |  | 1,621.0 |
Other Revenues [Member] |  |  |  |  |  |  |
Reportable Segment Information |  |  |  |  |  |  |
Revenue from Contracts with Customers |  | 408.2 |  | 367.4 |  | 305.6 |
Total Revenues |  | 360.3 | [1],[2] | 227.6 | [3],[4] | 61.5 | [5],[6]
Other Revenues [Member] | AEP Transmission Co [Member] |  |  |  |  |  |  |
Reportable Segment Information |  |  |  |  |  |  |
Revenue from Contracts with Customers |  | (0.2) |  | 0.3 |  | 0.6 |
Total Revenues |  | 0.0 | [7] | 0.0 | [8] | 0.0 | [9]
Reconciling Adjustments [Member] |  |  |  |  |  |  |
Reportable Segment Information |  |  |  |  |  |  |
Revenue from Contracts with Customers |  | 0.0 |  | 0.0 |  | 0.0 |
Sales to AEP Affiliates |  | (1,603.8) |  | (1,461.5) |  | (1,328.0) |
Total Revenues |  | (1,603.8) |  | (1,461.5) |  | (1,328.0) |
Loss on the Expected Sale of KPCo |  | 0.0 |  |  |  |  |
Asset Impairments and Other Related Charges |  | 0.0 |  | 0.0 |  |  |
Establishment of 2017-2019 Virginia Triennial Review Regulatory Asset |  | 0.0 |  |  |  |  |
Gain (Loss) on Disposition of Assets |  | 0.0 |  |  |  |  |
Utilities Operating Expense, Depreciation and Amortization |  | 0.0 |  | 0.0 |  | 0.0 |
Interest Expense |  | (112.8) |  | (18.7) |  | (42.1) |
Income Tax Expense/Benefit |  | 0.0 |  | 0.0 |  | 0.0 |
Equity Earnings (Loss) of Unconsolidated Subsidiaries |  | 0.0 |  | 0.0 |  | 0.0 |
Net Income (Loss) |  | 0.0 |  | 0.0 |  | 0.0 |
Gross Property Additions |  | (28.8) |  | (29.2) |  | (15.3) |
Balance Sheet Information |  |  |  |  |  |  |
Total Assets | [10] | (5,783.0) |  | (4,409.1) |  |  |
Investments in Equity Method Investees |  | 0.0 |  | 0.0 |  |  |
Reconciling Adjustments [Member] | AEP Transmission Co [Member] |  |  |  |  |  |  |
Reportable Segment Information |  |  |  |  |  |  |
Revenue from Contracts with Customers |  | 0.0 |  | 0.0 |  | 0.0 |
Sales to AEP Affiliates |  | 0.0 |  | 0.0 |  | 0.0 |
Total Revenues |  | 0.0 |  | 0.0 |  | 0.0 |
Utilities Operating Expense, Depreciation and Amortization |  | 0.0 |  | 0.0 |  | 0.0 |
Interest Income | [11] | (176.9) |  | (157.7) |  | (148.1) |
Allowance for Equity Funds Used During Construction |  | 0.0 |  | 0.0 |  | 0.0 |
Interest Expense | [11] | (176.9) |  | (157.7) |  | (148.1) |
Income Tax Expense/Benefit |  | 0.0 |  | 0.0 |  | 0.0 |
Net Income (Loss) |  | 0.0 |  | 0.0 |  | 0.0 |
Gross Property Additions |  | 0.0 |  | 0.0 |  | 0.0 |
Balance Sheet Information |  |  |  |  |  |  |
Total Assets | [12] | (4,878.8) |  | (4,429.4) |  |  |
Reconciling Adjustments [Member] | Other Revenues [Member] |  |  |  |  |  |  |
Reportable Segment Information |  |  |  |  |  |  |
Total Revenues |  | (9.1) | [1],[2] | (10.7) | [3],[4] | (74.9) | [5],[6]
Reconciling Adjustments [Member] | Other Revenues [Member] | AEP Transmission Co [Member] |  |  |  |  |  |  |
Reportable Segment Information |  |  |  |  |  |  |
Revenue from Contracts with Customers |  | 0.0 |  | 0.0 |  | 0.0 |
Vertically Integrated Utilities [Member] |  |  |  |  |  |  |
Reportable Segment Information |  |  |  |  |  |  |
Sales to AEP Affiliates |  | 184.7 |  | 146.3 |  | 126.2 |
Total Revenues |  | 11,477.5 |  | 9,998.5 |  | 8,879.4 |
Loss on the Expected Sale of KPCo |  | 0.0 |  |  |  |  |
Asset Impairments and Other Related Charges |  | 24.9 |  | 11.6 |  |  |
Establishment of 2017-2019 Virginia Triennial Review Regulatory Asset |  | (37.0) |  |  |  |  |
Gain (Loss) on Disposition of Assets |  | 0.0 |  |  |  |  |
Utilities Operating Expense, Depreciation and Amortization |  | 2,007.2 |  | 1,747.6 |  | 1,600.5 |
Interest Expense |  | 650.9 |  | 574.2 |  | 565.0 |
Income Tax Expense/Benefit |  | (93.8) |  | (11.2) |  | (7.0) |
Equity Earnings (Loss) of Unconsolidated Subsidiaries |  | 1.4 |  | 3.4 |  | 2.9 |
Net Income (Loss) |  | 1,296.2 |  | 1,116.7 |  | 1,064.5 |
Gross Property Additions |  | 4,164.6 |  | 2,963.1 |  | 2,291.2 |
Balance Sheet Information |  |  |  |  |  |  |
Total Assets |  | 49,761.8 |  | 46,974.2 |  |  |
Investments in Equity Method Investees |  | 10.1 |  | 33.5 |  | 37.1 |
Vertically Integrated Utilities [Member] | Vertically Integrated Utilities [Member] |  |  |  |  |  |  |
Reportable Segment Information |  |  |  |  |  |  |
Revenue from Contracts with Customers |  | 11,292.8 |  | 9,852.2 |  | 8,753.2 |
Vertically Integrated Utilities [Member] | Other Revenues [Member] |  |  |  |  |  |  |
Reportable Segment Information |  |  |  |  |  |  |
Total Revenues |  | 0.4 | [1],[2] | (0.5) | [3],[4] | 0.0 | [5],[6]
Transmission and Distribution Companies [Member] |  |  |  |  |  |  |
Reportable Segment Information |  |  |  |  |  |  |
Sales to AEP Affiliates |  | 22.4 |  | 28.8 |  | 107.2 |
Total Revenues |  | 5,512.0 |  | 4,492.9 |  | 4,345.9 |
Loss on the Expected Sale of KPCo |  | 0.0 |  |  |  |  |
Asset Impairments and Other Related Charges |  | 0.0 |  | 0.0 |  |  |
Establishment of 2017-2019 Virginia Triennial Review Regulatory Asset |  | 0.0 |  |  |  |  |
Gain (Loss) on Disposition of Assets |  | 0.0 |  |  |  |  |
Utilities Operating Expense, Depreciation and Amortization |  | 746.7 |  | 690.3 |  | 751.1 |
Interest Expense |  | 328.0 |  | 300.9 |  | 289.2 |
Income Tax Expense/Benefit |  | 116.9 |  | 77.5 |  | 29.7 |
Equity Earnings (Loss) of Unconsolidated Subsidiaries |  | 0.6 |  | 0.0 |  | 0.0 |
Net Income (Loss) |  | 595.7 |  | 543.4 |  | 496.4 |
Gross Property Additions |  | 2,177.3 |  | 1,766.0 |  | 2,108.1 |
Balance Sheet Information |  |  |  |  |  |  |
Total Assets |  | 22,920.2 |  | 21,120.2 |  |  |
Investments in Equity Method Investees |  | 3.0 |  | 2.5 |  | 2.1 |
Transmission and Distribution Companies [Member] | Transmission and Distribution Utilities Revenues [Member] |  |  |  |  |  |  |
Reportable Segment Information |  |  |  |  |  |  |
Revenue from Contracts with Customers |  | 5,489.6 |  | 4,464.1 |  | 4,238.7 |
Transmission and Distribution Companies [Member] | Other Revenues [Member] |  |  |  |  |  |  |
Reportable Segment Information |  |  |  |  |  |  |
Total Revenues |  | 18.6 | [1],[2] | 19.0 | [3],[4] | 83.0 | [5],[6]
AEP Transmission Holdco |  |  |  |  |  |  |
Reportable Segment Information |  |  |  |  |  |  |
Sales to AEP Affiliates |  | 1,319.5 |  | 1,175.1 |  | 901.4 |
Total Revenues |  | 1,677.0 |  | 1,526.2 |  | 1,198.8 |
Loss on the Expected Sale of KPCo |  | 0.0 |  |  |  |  |
Asset Impairments and Other Related Charges |  | 0.0 |  | 0.0 |  |  |
Establishment of 2017-2019 Virginia Triennial Review Regulatory Asset |  | 0.0 |  |  |  |  |
Gain (Loss) on Disposition of Assets |  | 0.0 |  |  |  |  |
Utilities Operating Expense, Depreciation and Amortization |  | 355.0 |  | 306.0 |  | 257.6 |
Interest Expense |  | 169.3 |  | 146.3 |  | 133.2 |
Income Tax Expense/Benefit |  | 193.6 |  | 159.6 |  | 130.8 |
Equity Earnings (Loss) of Unconsolidated Subsidiaries |  | 83.4 |  | 75.0 |  | 82.4 |
Net Income (Loss) |  | 676.8 |  | 682.0 |  | 508.5 |
Gross Property Additions |  | 1,470.8 |  | 1,468.6 |  | 1,649.3 |
Balance Sheet Information |  |  |  |  |  |  |
Total Assets |  | 15,215.8 |  | 13,873.3 |  |  |
Investments in Equity Method Investees |  | 858.3 |  | 830.4 |  | 831.3 |
AEP Transmission Holdco | Transmission [Member] |  |  |  |  |  |  |
Reportable Segment Information |  |  |  |  |  |  |
Revenue from Contracts with Customers |  | 357.5 |  | 351.1 |  | 297.4 |
Generation and Marketing [Member] |  |  |  |  |  |  |
Reportable Segment Information |  |  |  |  |  |  |
Sales to AEP Affiliates |  | 18.0 |  | 55.4 |  | 104.6 |
Total Revenues |  | 2,466.9 |  | 2,163.7 |  | 1,725.6 |
Loss on the Expected Sale of KPCo |  | 0.0 |  |  |  |  |
Asset Impairments and Other Related Charges |  | 0.0 |  | 0.0 |  |  |
Establishment of 2017-2019 Virginia Triennial Review Regulatory Asset |  | 0.0 |  |  |  |  |
Gain (Loss) on Disposition of Assets |  | (116.3) |  |  |  |  |
Utilities Operating Expense, Depreciation and Amortization |  | 93.0 |  | 80.9 |  | 72.8 |
Interest Expense |  | 51.8 |  | 15.6 |  | 24.0 |
Income Tax Expense/Benefit |  | (83.1) |  | (48.8) |  | (108.0) |
Equity Earnings (Loss) of Unconsolidated Subsidiaries |  | (192.4) |  | (10.6) |  | 3.2 |
Net Income (Loss) |  | 274.5 |  | 210.2 |  | 216.9 |
Gross Property Additions |  | 69.2 |  | 232.8 |  | 197.0 |
Balance Sheet Information |  |  |  |  |  |  |
Total Assets |  | 4,520.1 |  | 4,263.6 |  |  |
Investments in Equity Method Investees |  | 337.6 |  | 487.8 |  | 467.0 |
Generation and Marketing [Member] | Generation and Marketing Revenues [Member] |  |  |  |  |  |  |
Reportable Segment Information |  |  |  |  |  |  |
Revenue from Contracts with Customers |  | 2,448.9 |  | 2,108.3 |  | 1,621.0 |
Generation and Marketing [Member] | Other Revenues [Member] |  |  |  |  |  |  |
Reportable Segment Information |  |  |  |  |  |  |
Total Revenues |  | 341.3 | [1],[2] | 209.1 | [3],[4] | 43.6 | [5],[6]
All Other [Member] |  |  |  |  |  |  |
Reportable Segment Information |  |  |  |  |  |  |
Sales to AEP Affiliates | [13] | 59.2 |  | 55.9 |  | 88.6 |
Total Revenues | [13] | 109.9 |  | 72.2 |  | 96.8 |
Loss on the Expected Sale of KPCo | [13] | 363.3 |  |  |  |  |
Asset Impairments and Other Related Charges | [13] | 23.9 |  | 0.0 |  |  |
Establishment of 2017-2019 Virginia Triennial Review Regulatory Asset | [13] | 0.0 |  |  |  |  |
Gain (Loss) on Disposition of Assets | [13] | 0.0 |  |  |  |  |
Utilities Operating Expense, Depreciation and Amortization | [13] | 0.9 |  | 0.9 |  | 0.8 |
Interest Expense | [13] | 308.9 |  | 180.8 |  | 196.4 |
Income Tax Expense/Benefit | [13] | (128.2) |  | (61.6) |  | (5.0) |
Equity Earnings (Loss) of Unconsolidated Subsidiaries | [13] | (2.4) |  | 23.9 |  | 2.6 |
Net Income (Loss) | [13] | (537.6) |  | (64.2) |  | (89.6) |
Gross Property Additions | [13] | 25.9 |  | 25.5 |  | 16.0 |
Balance Sheet Information |  |  |  |  |  |  |
Total Assets | [13],[14] | 6,768.4 |  | 5,846.5 |  |  |
Investments in Equity Method Investees | [13] | 67.7 |  | 93.3 |  | 68.8 |
All Other [Member] | Other Revenues [Member] |  |  |  |  |  |  |
Reportable Segment Information |  |  |  |  |  |  |
Revenue from Contracts with Customers | [13] | 50.7 |  | 16.3 |  | 8.2 |
Total Revenues |  | 9.1 | [1],[2] | 10.7 | [3],[4] | 9.8 | [5],[6]
State Transcos [Member] | AEP Transmission Co [Member] |  |  |  |  |  |  |
Reportable Segment Information |  |  |  |  |  |  |
Sales to AEP Affiliates |  | 1,283.8 |  | 1,153.9 |  | 896.3 |
Total Revenues |  | 1,624.5 |  | 1,469.3 |  | 1,145.7 |
Utilities Operating Expense, Depreciation and Amortization |  | 346.2 |  | 297.3 |  | 249.0 |
Interest Income |  | 0.7 |  | 0.1 |  | 0.9 |
Allowance for Equity Funds Used During Construction |  | 70.7 |  | 67.2 |  | 74.0 |
Interest Expense |  | 162.5 |  | 141.2 |  | 127.8 |
Income Tax Expense/Benefit |  | 169.1 |  | 144.1 |  | 106.5 |
Net Income (Loss) |  | 594.2 |  | 591.5 |  | 422.3 |
Gross Property Additions |  | 1,468.3 |  | 1,442.7 |  | 1,621.9 |
Balance Sheet Information |  |  |  |  |  |  |
Total Assets |  | 13,875.6 |  | 12,564.3 |  |  |
State Transcos [Member] | Transmission [Member] | AEP Transmission Co [Member] |  |  |  |  |  |  |
Reportable Segment Information |  |  |  |  |  |  |
Revenue from Contracts with Customers |  | 340.9 |  | 315.1 |  | 248.8 |
State Transcos [Member] | Other Revenues [Member] | AEP Transmission Co [Member] |  |  |  |  |  |  |
Reportable Segment Information |  |  |  |  |  |  |
Revenue from Contracts with Customers |  | (0.2) |  | 0.3 |  | 0.6 |
AEPTCo Parent [Member] | AEP Transmission Co [Member] |  |  |  |  |  |  |
Reportable Segment Information |  |  |  |  |  |  |
Sales to AEP Affiliates |  | 0.0 |  | 0.0 |  | 0.0 |
Total Revenues |  | 0.0 |  | 0.0 |  | 0.0 |
Utilities Operating Expense, Depreciation and Amortization |  | 0.0 |  | 0.0 |  | 0.0 |
Interest Income |  | 177.8 |  | 158.1 |  | 149.6 |
Allowance for Equity Funds Used During Construction |  | 0.0 |  | 0.0 |  | 0.0 |
Interest Expense |  | 177.1 |  | 157.7 |  | 148.1 |
Income Tax Expense/Benefit |  | 0.0 |  | 0.0 |  | 0.2 |
Net Income (Loss) | [15] | 0.0 |  | 0.2 |  | 1.1 |
Gross Property Additions |  | 0.0 |  | 0.0 |  | 0.0 |
Balance Sheet Information |  |  |  |  |  |  |
Total Assets | [16] | 4,817.4 |  | 4,389.5 |  |  |
AEPTCo Parent [Member] | Transmission [Member] | AEP Transmission Co [Member] |  |  |  |  |  |  |
Reportable Segment Information |  |  |  |  |  |  |
Revenue from Contracts with Customers |  | 0.0 |  | 0.0 |  | 0.0 |
AEPTCo Parent [Member] | Other Revenues [Member] | AEP Transmission Co [Member] |  |  |  |  |  |  |
Reportable Segment Information |  |  |  |  |  |  |
Revenue from Contracts with Customers |  | $ 0.0 |  | $ 0.0 |  | $ 0.0 |
[1] | Amounts include affiliated and nonaffiliated revenues.
[2] | Generation & Marketing includes economic hedge activity.
[3] | Amounts include affiliated and nonaffiliated revenues.
[4] | Generation & Marketing includes economic hedge activity.
[5] | Amounts include affiliated and nonaffiliated revenues.
[6] | Generation & Marketing includes economic hedge activity.
[7] | Amounts include affiliated and nonaffiliated revenues.
[8] | Amounts include affiliated and nonaffiliated revenues.
[9] | Amounts include affiliated and nonaffiliated revenues.
[10] | Reconciling Adjustments for Total Assets primarily include elimination of intercompany advances to affiliates and intercompany accounts receivable.
[11] | Elimination of intercompany interest income/interest expense on affiliated debt arrangement.
[12] | Primarily relates to elimination of Notes Receivable from the State Transcos.
[13] | Corporate and Other primarily includes the purchasing of receivables from certain AEP utility subsidiaries. This segment also includes Parent’s guarantee revenue received from affiliates, investment income, interest income, interest expense and other nonallocated costs.
[14] | Includes elimination of AEP Parent’s investments in wholly-owned subsidiary companies.
[15] | Includes elimination of AEPTCo Parent’s equity earnings in the State Transcos.
[16] | Primarily relates to Notes Receivable from the State Transcos.

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