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Business Segments (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Reportable Segment Information |  |  |  |  |  |  |
Revenue from Contract with Customers |  | $ 18,982.3 |  | $ 19,639.5 |  | $ 16,792.0 |
Total Revenues |  | 18,982.3 |  | 19,639.5 |  | 16,792.0 |
Loss on the Expected Sale of KPCo |  |  |  | 363.3 |  |  |
Asset Impairments and Other Related Charges |  | 85.6 |  | 48.8 |  | 11.6 |
Establishment of 2017-2019 Virginia Triennial Review Regulatory Asset |  | 0.0 |  | (37.0) |  | 0.0 |
Loss on the Sale of the Competitive Contracted Renewables Portfolio |  | 92.7 |  |  |  |  |
Gain (Loss) on Disposition Assets |  |  |  | (116.3) |  |  |
Depreciation and Amortization |  | 3,090.4 |  | 3,202.8 |  | 2,825.7 |
Allowance for Equity Funds Used During Construction |  | 174.9 |  | 133.7 |  | 139.7 |
Interest Expense |  | 1,806.9 |  | 1,396.1 |  | 1,199.1 |
Income Tax Expense (Benefit) |  | 54.6 |  | 5.4 |  | 115.5 |
Equity Earnings (Loss) of Unconsolidated Subsidiaries |  | 58.5 |  | (109.4) |  | 91.7 |
Net Income (Loss) |  | 2,212.6 |  | 2,305.6 |  | 2,488.1 |
Gross Property Additions |  | 7,533.5 |  | 7,879.0 |  | 6,426.8 |
Balance Sheet Information |  |  |  |  |  |  |
Property, Plant and Equipment, Gross, Period Increase (Decrease) |  | 101,246.4 |  | 97,021.4 |  |  |
Accumulated Depreciation and Amortization |  | 24,553.0 |  | 23,682.3 |  |  |
TOTAL PROPERTY, PLANT AND EQUIPMENT - NET |  | 76,693.4 |  | 73,339.1 |  |  |
Total Assets |  | 96,684.0 |  | 93,403.3 |  |  |
Investments in Equity Method Investees |  | 1,073.6 |  | 1,276.7 |  | 1,447.5 |
Long-term Debt Due Within One Year |  | 2,490.5 |  | 2,486.4 |  |  |
Long-term Debt |  | 37,652.7 |  | 34,314.6 |  |  |
Total Long-term Debt Outstanding |  | 40,143.2 |  | 36,801.0 |  |  |
Related Party |  |  |  |  |  |  |
Reportable Segment Information |  |  |  |  |  |  |
Revenue from Contract with Customers |  | 0.0 |  | 0.0 |  | 0.0 |
AEP Transmission Co [Member] |  |  |  |  |  |  |
Reportable Segment Information |  |  |  |  |  |  |
Revenue from Contract with Customers |  | 1,720.6 |  | 1,651.7 |  | 1,410.9 |
Total Revenues |  | 1,672.0 |  | 1,624.5 |  | 1,469.3 |
Depreciation and Amortization |  | 393.8 |  | 346.2 |  | 297.3 |
Interest Income |  | 7.0 |  | 1.6 |  | 0.5 |
Allowance for Equity Funds Used During Construction |  | 83.2 |  | 70.7 |  | 67.2 |
Interest Expense |  | 194.5 |  | 162.7 |  | 141.2 |
Income Tax Expense (Benefit) |  | 147.1 |  | 169.1 |  | 144.1 |
Net Income (Loss) |  | 614.2 |  | 594.2 |  | 591.7 |
Gross Property Additions |  | 1,503.1 |  | 1,468.3 |  | 1,442.7 |
Balance Sheet Information |  |  |  |  |  |  |
Property, Plant and Equipment, Gross, Period Increase (Decrease) |  | 15,789.0 |  | 14,366.9 |  |  |
Accumulated Depreciation and Amortization |  | 1,291.3 |  | 1,027.0 |  |  |
TOTAL PROPERTY, PLANT AND EQUIPMENT - NET |  | 14,497.7 |  | 13,339.9 |  |  |
Total Assets |  | 15,072.5 |  | 13,814.2 |  |  |
Long-term Debt Due Within One Year |  | 95.0 |  | 60.0 |  |  |
Long-term Debt |  | 5,319.4 |  | 4,722.8 |  |  |
Total Long-term Debt Outstanding |  | 5,414.4 |  | 4,782.8 |  |  |
AEP Transmission Co [Member] | Related Party |  |  |  |  |  |  |
Reportable Segment Information |  |  |  |  |  |  |
Revenue from Contract with Customers |  | 1,463.4 |  | 1,354.5 |  | 1,171.5 |
Transmission Revenues |  | 1,317.8 |  | 1,283.8 |  | 1,153.9 |
Vertically Integrated Utilities [Member] |  |  |  |  |  |  |
Reportable Segment Information |  |  |  |  |  |  |
Revenue from Contract with Customers |  | 11,303.7 |  | 11,292.8 |  | 9,852.2 |
Transmission and Distribution Utilities Revenues [Member] |  |  |  |  |  |  |
Reportable Segment Information |  |  |  |  |  |  |
Revenue from Contract with Customers |  | 5,677.2 |  | 5,489.6 |  | 4,464.1 |
Transmission [Member] | AEP Transmission Co [Member] |  |  |  |  |  |  |
Reportable Segment Information |  |  |  |  |  |  |
Revenue from Contract with Customers |  | 363.3 |  | 354.9 |  | 317.8 |
Transmission Revenues |  | 354.2 |  | 340.9 |  | 315.1 |
Generation and Marketing Revenues [Member] |  |  |  |  |  |  |
Reportable Segment Information |  |  |  |  |  |  |
Revenue from Contract with Customers |  | 1,543.3 |  | 2,448.9 |  | 2,108.3 |
Other Revenues [Member] |  |  |  |  |  |  |
Reportable Segment Information |  |  |  |  |  |  |
Revenue from Contract with Customers |  | 458.1 |  | 408.2 |  | 367.4 |
Total Revenues |  | (355.4) | [1],[2] | 360.3 | [3],[4] | 227.6 | [5],[6]
Other Revenues [Member] | AEP Transmission Co [Member] |  |  |  |  |  |  |
Reportable Segment Information |  |  |  |  |  |  |
Revenue from Contract with Customers |  |  |  | (0.2) |  | 0.3 |
Total Revenues |  | 0.0 | [7] | 0.0 | [8] | 0.0 | [9]
Reconciling Adjustments [Member] |  |  |  |  |  |  |
Reportable Segment Information |  |  |  |  |  |  |
Revenue from Contract with Customers |  | 0.0 |  | 0.0 |  | 0.0 |
Total Revenues |  | (1,709.2) |  | (1,603.8) |  | (1,461.5) |
Loss on the Expected Sale of KPCo |  |  |  | 0.0 |  |  |
Asset Impairments and Other Related Charges |  | 0.0 |  | 0.0 |  | 0.0 |
Establishment of 2017-2019 Virginia Triennial Review Regulatory Asset |  |  |  | 0.0 |  |  |
Loss on the Sale of the Competitive Contracted Renewables Portfolio |  | 0.0 |  |  |  |  |
Gain (Loss) on Disposition Assets |  |  |  | 0.0 |  |  |
Depreciation and Amortization |  | 0.0 |  | 0.0 |  | 0.0 |
Interest Expense |  | (194.5) |  | (112.8) |  | (18.7) |
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 |  | 1.4 |  | (28.8) |  | (29.2) |
Balance Sheet Information |  |  |  |  |  |  |
Total Assets | [10] | (4,324.6) |  | (5,783.0) |  |  |
Investments in Equity Method Investees |  | 0.0 |  | 0.0 |  | 0.0 |
Reconciling Adjustments [Member] | Related Party |  |  |  |  |  |  |
Reportable Segment Information |  |  |  |  |  |  |
Revenue from Contract with Customers | [11] | (1,709.2) |  | (1,603.8) |  | (1,461.5) |
Reconciling Adjustments [Member] | AEP Transmission Co [Member] |  |  |  |  |  |  |
Reportable Segment Information |  |  |  |  |  |  |
Total Revenues |  | 0.0 |  | 0.0 |  | 0.0 |
Depreciation and Amortization |  | 0.0 |  | 0.0 |  | 0.0 |
Interest Income | [12] | (214.8) |  | (176.9) |  | (157.7) |
Allowance for Equity Funds Used During Construction |  | 0.0 |  | 0.0 |  | 0.0 |
Interest Expense | [12] | (214.8) |  | (176.9) |  | (157.7) |
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 |
Transmission Revenues |  | 0.0 |  | 0.0 |  | 0.0 |
Balance Sheet Information |  |  |  |  |  |  |
Total Assets | [13] | (5,534.7) |  | (4,878.8) |  |  |
Reconciling Adjustments [Member] | AEP Transmission Co [Member] | Related Party |  |  |  |  |  |  |
Reportable Segment Information |  |  |  |  |  |  |
Transmission Revenues |  | 0.0 |  | 0.0 |  | 0.0 |
Reconciling Adjustments [Member] | Other Revenues [Member] |  |  |  |  |  |  |
Reportable Segment Information |  |  |  |  |  |  |
Total Revenues |  | (15.3) | [1],[2] | (9.1) | [3],[4] | (10.7) | [5],[6]
Reconciling Adjustments [Member] | Other Revenues [Member] | AEP Transmission Co [Member] |  |  |  |  |  |  |
Reportable Segment Information |  |  |  |  |  |  |
Revenue from Contract with Customers |  |  |  | 0.0 |  | 0.0 |
Vertically Integrated Utilities [Member] |  |  |  |  |  |  |
Reportable Segment Information |  |  |  |  |  |  |
Total Revenues |  | 11,449.5 |  | 11,477.5 |  | 9,998.5 |
Loss on the Expected Sale of KPCo |  |  |  | 0.0 |  |  |
Asset Impairments and Other Related Charges |  | 85.6 |  | 24.9 |  | 11.6 |
Establishment of 2017-2019 Virginia Triennial Review Regulatory Asset |  |  |  | (37.0) |  |  |
Loss on the Sale of the Competitive Contracted Renewables Portfolio |  | 0.0 |  |  |  |  |
Gain (Loss) on Disposition Assets |  |  |  | 0.0 |  |  |
Depreciation and Amortization |  | 1,876.4 |  | 2,007.2 |  | 1,747.6 |
Interest Expense |  | 764.5 |  | 650.9 |  | 574.2 |
Income Tax Expense (Benefit) |  | (45.2) |  | (93.8) |  | (11.2) |
Equity Earnings (Loss) of Unconsolidated Subsidiaries |  | 1.4 |  | 1.4 |  | 3.4 |
Net Income (Loss) |  | 1,093.9 |  | 1,296.2 |  | 1,116.7 |
Gross Property Additions |  | 3,486.8 |  | 4,164.6 |  | 2,963.1 |
Balance Sheet Information |  |  |  |  |  |  |
Total Assets |  | 51,802.1 |  | 49,761.8 |  |  |
Investments in Equity Method Investees |  | 10.0 |  | 10.1 |  | 33.5 |
Vertically Integrated Utilities [Member] | Related Party |  |  |  |  |  |  |
Reportable Segment Information |  |  |  |  |  |  |
Revenue from Contract with Customers |  | 145.8 |  | 184.7 |  | 146.3 |
Vertically Integrated Utilities [Member] | Vertically Integrated Utilities [Member] |  |  |  |  |  |  |
Reportable Segment Information |  |  |  |  |  |  |
Revenue from Contract with Customers |  | 11,303.7 |  | 11,292.8 |  | 9,852.2 |
Vertically Integrated Utilities [Member] | Other Revenues [Member] |  |  |  |  |  |  |
Reportable Segment Information |  |  |  |  |  |  |
Total Revenues |  | 24.6 | [1],[2] | 0.4 | [3],[4] | (0.5) | [5],[6]
Transmission and Distribution Companies [Member] |  |  |  |  |  |  |
Reportable Segment Information |  |  |  |  |  |  |
Total Revenues |  | 5,713.3 |  | 5,512.0 |  | 4,492.9 |
Loss on the Expected Sale of KPCo |  |  |  | 0.0 |  |  |
Asset Impairments and Other Related Charges |  | 0.0 |  | 0.0 |  | 0.0 |
Establishment of 2017-2019 Virginia Triennial Review Regulatory Asset |  |  |  | 0.0 |  |  |
Loss on the Sale of the Competitive Contracted Renewables Portfolio |  | 0.0 |  |  |  |  |
Gain (Loss) on Disposition Assets |  |  |  | 0.0 |  |  |
Depreciation and Amortization |  | 784.7 |  | 746.7 |  | 690.3 |
Interest Expense |  | 363.6 |  | 328.0 |  | 300.9 |
Income Tax Expense (Benefit) |  | 140.2 |  | 116.9 |  | 77.5 |
Equity Earnings (Loss) of Unconsolidated Subsidiaries |  | 0.0 |  | 0.6 |  | 0.0 |
Net Income (Loss) |  | 698.7 |  | 595.7 |  | 543.4 |
Gross Property Additions |  | 2,467.4 |  | 2,177.3 |  | 1,766.0 |
Balance Sheet Information |  |  |  |  |  |  |
Total Assets |  | 24,838.4 |  | 22,920.2 |  |  |
Investments in Equity Method Investees |  | 3.0 |  | 3.0 |  | 2.5 |
Transmission and Distribution Companies [Member] | Related Party |  |  |  |  |  |  |
Reportable Segment Information |  |  |  |  |  |  |
Revenue from Contract with Customers |  | 36.1 |  | 22.4 |  | 28.8 |
Transmission and Distribution Companies [Member] | Transmission and Distribution Utilities Revenues [Member] |  |  |  |  |  |  |
Reportable Segment Information |  |  |  |  |  |  |
Revenue from Contract with Customers |  | 5,677.2 |  | 5,489.6 |  | 4,464.1 |
Transmission and Distribution Companies [Member] | Other Revenues [Member] |  |  |  |  |  |  |
Reportable Segment Information |  |  |  |  |  |  |
Total Revenues |  | 24.0 | [1],[2] | 18.6 | [3],[4] | 19.0 | [5],[6]
AEP Transmission Holdco |  |  |  |  |  |  |
Reportable Segment Information |  |  |  |  |  |  |
Total Revenues |  | 1,728.5 |  | 1,677.0 |  | 1,526.2 |
Loss on the Expected Sale of KPCo |  |  |  | 0.0 |  |  |
Asset Impairments and Other Related Charges |  | 0.0 |  | 0.0 |  | 0.0 |
Establishment of 2017-2019 Virginia Triennial Review Regulatory Asset |  |  |  | 0.0 |  |  |
Loss on the Sale of the Competitive Contracted Renewables Portfolio |  | 0.0 |  |  |  |  |
Gain (Loss) on Disposition Assets |  |  |  | 0.0 |  |  |
Depreciation and Amortization |  | 402.6 |  | 355.0 |  | 306.0 |
Interest Expense |  | 202.6 |  | 169.3 |  | 146.3 |
Income Tax Expense (Benefit) |  | 166.0 |  | 193.6 |  | 159.6 |
Equity Earnings (Loss) of Unconsolidated Subsidiaries |  | 82.9 |  | 83.4 |  | 75.0 |
Net Income (Loss) |  | 706.7 |  | 676.8 |  | 682.0 |
Gross Property Additions |  | 1,528.7 |  | 1,470.8 |  | 1,468.6 |
Balance Sheet Information |  |  |  |  |  |  |
Total Assets |  | 16,575.6 |  | 15,215.8 |  |  |
Investments in Equity Method Investees |  | 905.8 |  | 858.3 |  | 830.4 |
AEP Transmission Holdco | Related Party |  |  |  |  |  |  |
Reportable Segment Information |  |  |  |  |  |  |
Revenue from Contract with Customers |  | 1,331.1 |  | 1,319.5 |  | 1,175.1 |
AEP Transmission Holdco | Transmission [Member] |  |  |  |  |  |  |
Reportable Segment Information |  |  |  |  |  |  |
Revenue from Contract with Customers |  | 397.4 |  | 357.5 |  | 351.1 |
Generation and Marketing [Member] |  |  |  |  |  |  |
Reportable Segment Information |  |  |  |  |  |  |
Total Revenues |  | 1,632.2 |  | 2,466.9 |  | 2,163.7 |
Loss on the Expected Sale of KPCo |  |  |  | 0.0 |  |  |
Asset Impairments and Other Related Charges |  | 0.0 |  | 0.0 |  | 0.0 |
Establishment of 2017-2019 Virginia Triennial Review Regulatory Asset |  |  |  | 0.0 |  |  |
Loss on the Sale of the Competitive Contracted Renewables Portfolio |  | 92.7 |  |  |  |  |
Gain (Loss) on Disposition Assets |  |  |  | (116.3) |  |  |
Depreciation and Amortization |  | 42.7 |  | 93.0 |  | 80.9 |
Interest Expense |  | 76.0 |  | 51.8 |  | 15.6 |
Income Tax Expense (Benefit) |  | (122.9) |  | (83.1) |  | (48.8) |
Equity Earnings (Loss) of Unconsolidated Subsidiaries |  | (16.5) |  | (192.4) |  | (10.6) |
Net Income (Loss) |  | (29.1) |  | 274.5 |  | 210.2 |
Gross Property Additions |  | 12.6 |  | 69.2 |  | 232.8 |
Balance Sheet Information |  |  |  |  |  |  |
Total Assets |  | 2,598.5 |  | 4,520.1 |  |  |
Investments in Equity Method Investees |  | 100.6 |  | 337.6 |  | 487.8 |
Generation and Marketing [Member] | Related Party |  |  |  |  |  |  |
Reportable Segment Information |  |  |  |  |  |  |
Revenue from Contract with Customers |  | 88.9 |  | 18.0 |  | 55.4 |
Generation and Marketing [Member] | Generation and Marketing Revenues [Member] |  |  |  |  |  |  |
Reportable Segment Information |  |  |  |  |  |  |
Revenue from Contract with Customers |  | 1,543.3 |  | 2,448.9 |  | 2,108.3 |
Generation and Marketing [Member] | Other Revenues [Member] |  |  |  |  |  |  |
Reportable Segment Information |  |  |  |  |  |  |
Total Revenues |  | (404.5) | [1],[2] | 341.3 | [3],[4] | 209.1 | [5],[6]
Other Segments [Member] |  |  |  |  |  |  |
Reportable Segment Information |  |  |  |  |  |  |
Total Revenues | [14] | 168.0 |  | 109.9 |  | 72.2 |
Loss on the Expected Sale of KPCo | [14] |  |  | 363.3 |  |  |
Asset Impairments and Other Related Charges | [14] | 0.0 |  | 23.9 |  | 0.0 |
Establishment of 2017-2019 Virginia Triennial Review Regulatory Asset | [14] |  |  | 0.0 |  |  |
Loss on the Sale of the Competitive Contracted Renewables Portfolio | [14] | 0.0 |  |  |  |  |
Gain (Loss) on Disposition Assets | [14] |  |  | 0.0 |  |  |
Depreciation and Amortization | [14] | (16.0) |  | 0.9 |  | 0.9 |
Interest Expense | [14] | 594.7 |  | 308.9 |  | 180.8 |
Income Tax Expense (Benefit) | [14] | (83.5) |  | (128.2) |  | (61.6) |
Equity Earnings (Loss) of Unconsolidated Subsidiaries | [14] | (9.3) |  | (2.4) |  | 23.9 |
Net Income (Loss) | [14] | (257.6) |  | (537.6) |  | (64.2) |
Gross Property Additions | [14] | 36.6 |  | 25.9 |  | 25.5 |
Balance Sheet Information |  |  |  |  |  |  |
Total Assets | [14],[15] | 5,194.0 |  | 6,768.4 |  |  |
Investments in Equity Method Investees | [14] | 54.2 |  | 67.7 |  | 93.3 |
Other Segments [Member] | Related Party |  |  |  |  |  |  |
Reportable Segment Information |  |  |  |  |  |  |
Revenue from Contract with Customers | [14] | 107.3 |  | 59.2 |  | 55.9 |
Other Segments [Member] | Other Revenues [Member] |  |  |  |  |  |  |
Reportable Segment Information |  |  |  |  |  |  |
Revenue from Contract with Customers | [14] | 60.7 |  | 50.7 |  | 16.3 |
State Transcos [Member] | AEP Transmission Co [Member] |  |  |  |  |  |  |
Reportable Segment Information |  |  |  |  |  |  |
Total Revenues |  | 1,672.0 |  | 1,624.5 |  | 1,469.3 |
Depreciation and Amortization |  | 393.8 |  | 346.2 |  | 297.3 |
Interest Income |  | 3.8 |  | 0.7 |  | 0.1 |
Allowance for Equity Funds Used During Construction |  | 83.2 |  | 70.7 |  | 67.2 |
Interest Expense |  | 194.2 |  | 162.5 |  | 141.2 |
Income Tax Expense (Benefit) |  | 145.7 |  | 169.1 |  | 144.1 |
Net Income (Loss) |  | 612.9 |  | 594.2 |  | 591.5 |
Gross Property Additions |  | 1,503.1 |  | 1,468.3 |  | 1,442.7 |
Balance Sheet Information |  |  |  |  |  |  |
Total Assets |  | 15,120.6 |  | 13,875.6 |  |  |
State Transcos [Member] | AEP Transmission Co [Member] | Related Party |  |  |  |  |  |  |
Reportable Segment Information |  |  |  |  |  |  |
Transmission Revenues |  | 1,317.8 |  | 1,283.8 |  | 1,153.9 |
State Transcos [Member] | Transmission [Member] | AEP Transmission Co [Member] |  |  |  |  |  |  |
Reportable Segment Information |  |  |  |  |  |  |
Transmission Revenues |  | 354.2 |  | 340.9 |  | 315.1 |
State Transcos [Member] | Other Revenues [Member] | AEP Transmission Co [Member] |  |  |  |  |  |  |
Reportable Segment Information |  |  |  |  |  |  |
Revenue from Contract with Customers |  |  |  | (0.2) |  | 0.3 |
AEPTCo Parent [Member] | AEP Transmission Co [Member] |  |  |  |  |  |  |
Reportable Segment Information |  |  |  |  |  |  |
Total Revenues |  | 0.0 |  | 0.0 |  | 0.0 |
Depreciation and Amortization |  | 0.0 |  | 0.0 |  | 0.0 |
Interest Income |  | 218.0 |  | 177.8 |  | 158.1 |
Allowance for Equity Funds Used During Construction |  | 0.0 |  | 0.0 |  | 0.0 |
Interest Expense |  | 215.1 |  | 177.1 |  | 157.7 |
Income Tax Expense (Benefit) |  | 1.4 |  | 0.0 |  | 0.0 |
Net Income (Loss) | [16] | 1.3 |  | 0.0 |  | 0.2 |
Gross Property Additions |  | 0.0 |  | 0.0 |  | 0.0 |
Balance Sheet Information |  |  |  |  |  |  |
Total Assets | [17] | 5,486.6 |  | 4,817.4 |  |  |
AEPTCo Parent [Member] | AEP Transmission Co [Member] | Related Party |  |  |  |  |  |  |
Reportable Segment Information |  |  |  |  |  |  |
Transmission Revenues |  | 0.0 |  | 0.0 |  | 0.0 |
AEPTCo Parent [Member] | Transmission [Member] | AEP Transmission Co [Member] |  |  |  |  |  |  |
Reportable Segment Information |  |  |  |  |  |  |
Transmission Revenues |  | $ 0.0 |  | 0.0 |  | 0.0 |
AEPTCo Parent [Member] | Other Revenues [Member] | AEP Transmission Co [Member] |  |  |  |  |  |  |
Reportable Segment Information |  |  |  |  |  |  |
Revenue from Contract with Customers |  |  |  | $ 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] | Represents inter-segment revenues.
[12] | Elimination of intercompany interest income/interest expense on affiliated debt arrangement.
[13] | Primarily relates to elimination of Notes Receivable from the State Transcos.
[14] | 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.
[15] | Includes elimination of AEP Parent’s investments in wholly-owned subsidiary companies.
[16] | Includes elimination of AEPTCo Parent’s equity earnings in the State Transcos.
[17] | Primarily relates to Notes Receivable from the State Transcos.

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