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v3.24.2

Business Segments (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2024 | Mar. 31, 2024 | Jun. 30, 2023 | Mar. 31, 2023 | Jun. 30, 2024 | Jun. 30, 2023 | Dec. 31, 2023
Reportable Segment Information |  |  |  |  |  |  |  |  |  |  |  |
Interest Expense |  | $ 465.6 |  |  | $ 460.0 |  |  | $ 901.2 |  | $ 875.7 |  |
Revenue from Contracts with Customers |  | 4,579.2 |  |  | 4,372.5 |  |  | 9,604.9 |  | 9,063.4 |  |
Revenues |  | 4,579.2 |  |  | 4,372.5 |  |  | 9,604.9 |  | 9,063.4 |  |
Net Income (Loss) |  | 342.5 |  | $ 1,005.7 | 516.1 |  | $ 400.4 | 1,348.2 |  | 916.5 |  |
Income Tax (Expense) Benefit |  | 6.7 |  |  | 28.6 |  |  | (135.2) |  | 39.0 |  |
Balance Sheet Information |  |  |  |  |  |  |  |  |  |  |  |
Total Property, Plant and Equipment |  | 104,251.9 |  |  |  |  |  | 104,251.9 |  |  |  | $ 101,246.4
Accumulated Depreciation and Amortization |  | 25,391.5 |  |  |  |  |  | 25,391.5 |  |  |  | 24,553.0
TOTAL PROPERTY, PLANT AND EQUIPMENT - NET |  | 78,860.4 |  |  |  |  |  | 78,860.4 |  |  |  | 76,693.4
Total Assets |  | 99,622.6 | [1] |  |  |  |  | 99,622.6 | [1] |  |  | 96,684.0
Long-term Debt Due Within One Year |  | 2,071.9 |  |  |  |  |  | 2,071.9 |  |  |  | 2,490.5
Long-term Debt |  | 39,990.4 |  |  |  |  |  | 39,990.4 |  |  |  | 37,652.7
Total Long-term Debt Outstanding |  | 42,062.3 |  |  |  |  |  | 42,062.3 |  |  |  | 40,143.2
Related Party |  |  |  |  |  |  |  |  |  |  |  |
Reportable Segment Information |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Contracts with Customers |  | 0.0 |  |  | 0.0 |  |  | 0.0 |  | 0.0 |  |
Reclassification out of Accumulated Other Comprehensive Income [Member] |  |  |  |  |  |  |  |  |  |  |  |
Reportable Segment Information |  |  |  |  |  |  |  |  |  |  |  |
Interest Expense | [2] | (1.1) |  |  | (0.5) |  |  | (2.3) |  | 0.2 |  |
Income Tax (Expense) Benefit |  | 2.2 |  |  | 5.1 |  |  | (4.4) |  | 14.2 |  |
Interest Rate [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member] |  |  |  |  |  |  |  |  |  |  |  |
Reportable Segment Information |  |  |  |  |  |  |  |  |  |  |  |
Interest Expense | [2] | (1.1) |  |  | (0.5) |  |  | (2.3) |  | 0.2 |  |
Income Tax (Expense) Benefit |  | (0.1) |  |  | (0.1) |  |  | (0.4) |  | 0.0 |  |
Vertically Integrated Utilities [Member] |  |  |  |  |  |  |  |  |  |  |  |
Reportable Segment Information |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Contracts with Customers |  | 2,572.0 |  |  | 2,629.0 |  |  | 5,473.2 |  | 5,445.3 |  |
Transmission and Distribution Utilities Revenues [Member] |  |  |  |  |  |  |  |  |  |  |  |
Reportable Segment Information |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Contracts with Customers |  | 1,428.8 |  |  | 1,330.8 |  |  | 2,912.0 |  | 2,786.1 |  |
Generation and Marketing Revenues [Member] |  |  |  |  |  |  |  |  |  |  |  |
Reportable Segment Information |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Contracts with Customers |  | 442.5 |  |  | 318.2 |  |  | 958.4 |  | 645.1 |  |
Other Revenues [Member] |  |  |  |  |  |  |  |  |  |  |  |
Reportable Segment Information |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Contracts with Customers |  | 135.9 |  |  | 94.5 |  |  | 261.3 |  | 186.9 |  |
Revenues |  | (42.8) | [3],[4] |  | (128.8) | [5],[6] |  | (103.6) | [7],[8] | (258.7) | [9],[10] |
AEP Transmission Co [Member] |  |  |  |  |  |  |  |  |  |  |  |
Reportable Segment Information |  |  |  |  |  |  |  |  |  |  |  |
Interest Expense |  | 51.4 |  |  | 50.7 |  |  | 106.2 |  | 95.9 |  |
Interest Income |  | 4.3 |  |  | 2.6 |  |  | 6.2 |  | 4.1 |  |
Revenues from Related Parties, Net of Provisions for Refund |  | 377.8 |  |  | 357.5 |  |  | 761.2 |  | 710.1 |  |
Revenues |  | 475.2 |  |  | 444.9 |  |  | 958.0 |  | 886.5 |  |
Net Income (Loss) |  | 175.7 |  | $ 181.2 | 175.7 |  | $ 162.7 | 356.9 |  | 338.4 |  |
Income Tax (Expense) Benefit |  | 47.7 |  |  | 49.1 |  |  | 99.8 |  | 96.8 |  |
Balance Sheet Information |  |  |  |  |  |  |  |  |  |  |  |
Total Property, Plant and Equipment |  | 16,522.8 |  |  |  |  |  | 16,522.8 |  |  |  | 15,789.0
Accumulated Depreciation and Amortization |  | 1,436.8 |  |  |  |  |  | 1,436.8 |  |  |  | 1,291.3
TOTAL PROPERTY, PLANT AND EQUIPMENT - NET |  | 15,086.0 |  |  |  |  |  | 15,086.0 |  |  |  | 14,497.7
Total Assets |  | 15,786.2 |  |  |  |  |  | 15,786.2 |  |  |  | 15,072.5
Long-term Debt Due Within One Year |  | 185.0 |  |  |  |  |  | 185.0 |  |  |  | 95.0
Long-term Debt |  | 5,676.5 |  |  |  |  |  | 5,676.5 |  |  |  | 5,319.4
Total Long-term Debt Outstanding |  | 5,861.5 |  |  |  |  |  | 5,861.5 |  |  |  | 5,414.4
AEP Transmission Co [Member] | Related Party |  |  |  |  |  |  |  |  |  |  |  |
Reportable Segment Information |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Contracts with Customers |  | 394.4 |  |  | 365.8 |  |  | 783.8 |  | 723.2 |  |
AEP Transmission Co [Member] | Other Revenues [Member] |  |  |  |  |  |  |  |  |  |  |  |
Reportable Segment Information |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Contract with Customers, Net of Provisions for Refund, Including Assessed Tax |  | 0.4 |  |  |  |  |  | 2.8 |  |  |  |
Revenue from Contracts with Customers |  | 0.4 |  |  | 0.0 |  |  | 2.8 |  | 0.0 |  |
Revenues |  | 0.0 | [11] |  | 0.0 | [12] |  | 0.0 | [13] | 0.0 | [14] |
AEP Transmission Co [Member] | Transmission [Member] |  |  |  |  |  |  |  |  |  |  |  |
Reportable Segment Information |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Contract with Customers, Net of Provisions for Refund, Including Assessed Tax |  | 97.0 |  |  | 87.4 |  |  | 194.0 |  | 176.4 |  |
Revenue from Contracts with Customers |  | 97.3 |  |  | 90.2 |  |  | 195.7 |  | 180.2 |  |
Reconciling Adjustments [Member] |  |  |  |  |  |  |  |  |  |  |  |
Reportable Segment Information |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Contracts with Customers |  | 0.0 |  |  | 0.0 |  |  | 0.0 |  | 0.0 |  |
Revenues |  | (490.8) |  |  | (464.2) |  |  | (1,016.8) |  | (907.9) |  |
Net Income (Loss) |  | 0.0 |  |  | 0.0 |  |  | 0.0 |  | 0.0 |  |
Balance Sheet Information |  |  |  |  |  |  |  |  |  |  |  |
Total Assets | [15] | (4,122.9) | [1] |  |  |  |  | (4,122.9) | [1] |  |  | (4,324.6)
Reconciling Adjustments [Member] | Related Party |  |  |  |  |  |  |  |  |  |  |  |
Reportable Segment Information |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Contracts with Customers | [16] | (490.8) |  |  | (464.2) |  |  | (1,016.8) |  | (907.9) |  |
Reconciling Adjustments [Member] | Other Revenues [Member] |  |  |  |  |  |  |  |  |  |  |  |
Reportable Segment Information |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  | (2.4) | [3],[4] |  | (2.0) | [5],[6] |  | 5.6 | [7],[8] | (2.9) | [9],[10] |
Reconciling Adjustments [Member] | AEP Transmission Co [Member] |  |  |  |  |  |  |  |  |  |  |  |
Reportable Segment Information |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Contracts with Customers |  | 0.0 |  |  | 0.0 |  |  | 0.0 |  | 0.0 |  |
Revenues |  | 0.0 |  |  | 0.0 |  |  | 0.0 |  | 0.0 |  |
Net Income (Loss) |  | 0.0 |  |  | 0.0 |  |  | 0.0 |  | 0.0 |  |
Balance Sheet Information |  |  |  |  |  |  |  |  |  |  |  |
Total Assets | [17] | (5,991.5) |  |  |  |  |  | (5,991.5) |  |  |  | (5,534.7)
Reconciling Adjustments [Member] | AEP Transmission Co [Member] | Related Party |  |  |  |  |  |  |  |  |  |  |  |
Reportable Segment Information |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Contracts with Customers |  | 0.0 |  |  | 0.0 |  |  | 0.0 |  | 0.0 |  |
Reconciling Adjustments [Member] | AEP Transmission Co [Member] | Other Revenues [Member] |  |  |  |  |  |  |  |  |  |  |  |
Reportable Segment Information |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Contracts with Customers |  | 0.0 |  |  |  |  |  | 0.0 |  |  |  |
Vertically Integrated Utilities [Member] |  |  |  |  |  |  |  |  |  |  |  |
Reportable Segment Information |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  | 2,619.0 |  |  | 2,674.5 |  |  | 5,566.9 |  | 5,532.3 |  |
Net Income (Loss) |  | 66.7 |  |  | 278.4 |  |  | 629.0 |  | 540.6 |  |
Balance Sheet Information |  |  |  |  |  |  |  |  |  |  |  |
Total Assets |  | 53,576.1 | [1] |  |  |  |  | 53,576.1 | [1] |  |  | 51,802.1
Vertically Integrated Utilities [Member] | Related Party |  |  |  |  |  |  |  |  |  |  |  |
Reportable Segment Information |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Contracts with Customers |  | 47.0 |  |  | 45.5 |  |  | 93.7 |  | 87.0 |  |
Vertically Integrated Utilities [Member] | Vertically Integrated Utilities [Member] |  |  |  |  |  |  |  |  |  |  |  |
Reportable Segment Information |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Contracts with Customers |  | 2,572.0 |  |  | 2,629.0 |  |  | 5,473.2 |  | 5,445.3 |  |
Vertically Integrated Utilities [Member] | Other Revenues [Member] |  |  |  |  |  |  |  |  |  |  |  |
Reportable Segment Information |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  | 4.3 | [3],[4] |  | 0.1 | [5],[6] |  | (21.4) | [7],[8] | 0.0 | [9],[10] |
Transmission And Distribution Utilities [Member] |  |  |  |  |  |  |  |  |  |  |  |
Reportable Segment Information |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  | 1,435.9 |  |  | 1,340.2 |  |  | 2,926.1 |  | 2,804.4 |  |
Net Income (Loss) |  | 146.8 |  |  | 176.7 |  |  | 297.1 |  | 302.4 |  |
Balance Sheet Information |  |  |  |  |  |  |  |  |  |  |  |
Total Assets |  | 25,969.4 | [1] |  |  |  |  | 25,969.4 | [1] |  |  | 24,838.4
Transmission And Distribution Utilities [Member] | Related Party |  |  |  |  |  |  |  |  |  |  |  |
Reportable Segment Information |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Contracts with Customers |  | 7.1 |  |  | 9.4 |  |  | 14.1 |  | 18.3 |  |
Transmission And Distribution Utilities [Member] | Transmission and Distribution Utilities Revenues [Member] |  |  |  |  |  |  |  |  |  |  |  |
Reportable Segment Information |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Contracts with Customers |  | 1,428.8 |  |  | 1,330.8 |  |  | 2,912.0 |  | 2,786.1 |  |
Transmission And Distribution Utilities [Member] | Other Revenues [Member] |  |  |  |  |  |  |  |  |  |  |  |
Reportable Segment Information |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  | 4.0 | [3],[4] |  | 6.1 | [5],[6] |  | 11.9 | [7],[8] | 17.2 | [9],[10] |
AEP Transmission Holdco [Member] |  |  |  |  |  |  |  |  |  |  |  |
Reportable Segment Information |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  | 489.9 |  |  | 458.6 |  |  | 987.2 |  | 914.1 |  |
Net Income (Loss) |  | 201.9 |  |  | 197.3 |  |  | 411.7 |  | 379.7 |  |
Balance Sheet Information |  |  |  |  |  |  |  |  |  |  |  |
Total Assets |  | 17,358.2 | [1] |  |  |  |  | 17,358.2 | [1] |  |  | 16,575.6
AEP Transmission Holdco [Member] | Related Party |  |  |  |  |  |  |  |  |  |  |  |
Reportable Segment Information |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Contracts with Customers |  | 381.2 |  |  | 370.3 |  |  | 768.0 |  | 735.7 |  |
AEP Transmission Holdco [Member] | Transmission [Member] |  |  |  |  |  |  |  |  |  |  |  |
Reportable Segment Information |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Contracts with Customers |  | 108.7 |  |  | 88.3 |  |  | 219.2 |  | 178.4 |  |
Generation And Marketing [Member] |  |  |  |  |  |  |  |  |  |  |  |
Reportable Segment Information |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  | 467.5 |  |  | 331.4 |  |  | 1,031.0 |  | 658.4 |  |
Net Income (Loss) |  | (4.8) |  |  | (38.6) |  |  | 132.8 |  | (195.0) |  |
Balance Sheet Information |  |  |  |  |  |  |  |  |  |  |  |
Total Assets |  | 2,263.7 | [1] |  |  |  |  | 2,263.7 | [1] |  |  | 2,598.5
Generation And Marketing [Member] | Related Party |  |  |  |  |  |  |  |  |  |  |  |
Reportable Segment Information |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Contracts with Customers |  | 25.0 |  |  | 13.2 |  |  | 72.6 |  | 13.3 |  |
Generation And Marketing [Member] | Generation and Marketing Revenues [Member] |  |  |  |  |  |  |  |  |  |  |  |
Reportable Segment Information |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Contracts with Customers |  | 442.5 |  |  | 318.2 |  |  | 958.4 |  | 645.1 |  |
Generation And Marketing [Member] | Other Revenues [Member] |  |  |  |  |  |  |  |  |  |  |  |
Reportable Segment Information |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  | (50.9) | [3],[4] |  | (135.2) | [5],[6] |  | (93.8) | [7],[8] | (276.2) | [9],[10] |
All Other [Member] |  |  |  |  |  |  |  |  |  |  |  |
Reportable Segment Information |  |  |  |  |  |  |  |  |  |  |  |
Revenues | [18] | 57.7 |  |  | 32.0 |  |  | 110.5 |  | 62.1 |  |
Net Income (Loss) | [18] | (68.1) |  |  | (97.7) |  |  | (122.4) |  | (111.2) |  |
Balance Sheet Information |  |  |  |  |  |  |  |  |  |  |  |
Total Assets | [18],[19] | 4,578.1 | [1] |  |  |  |  | 4,578.1 | [1] |  |  | 5,194.0
All Other [Member] | Related Party |  |  |  |  |  |  |  |  |  |  |  |
Reportable Segment Information |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Contracts with Customers | [18] | 30.5 |  |  | 25.8 |  |  | 68.4 |  | 53.6 |  |
All Other [Member] | Other Revenues [Member] |  |  |  |  |  |  |  |  |  |  |  |
Reportable Segment Information |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Contracts with Customers | [18] | 27.2 |  |  | 6.2 |  |  | 42.1 |  | 8.5 |  |
Revenues |  | 2.2 | [3],[4] |  | 2.2 | [5],[6] |  | (5.9) | [7],[8] | 3.2 | [9],[10] |
State Transcos [Member] | AEP Transmission Co [Member] |  |  |  |  |  |  |  |  |  |  |  |
Reportable Segment Information |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  | 475.2 |  |  | 444.9 |  |  | 958.0 |  | 886.5 |  |
Net Income (Loss) |  | 175.2 |  |  | 174.2 |  |  | 356.9 |  | 335.8 |  |
Balance Sheet Information |  |  |  |  |  |  |  |  |  |  |  |
Total Assets |  | 15,835.5 |  |  |  |  |  | 15,835.5 |  |  |  | 15,120.6
State Transcos [Member] | AEP Transmission Co [Member] | Related Party |  |  |  |  |  |  |  |  |  |  |  |
Reportable Segment Information |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Contracts with Customers |  | 377.8 |  |  | 357.5 |  |  | 761.2 |  | 710.1 |  |
State Transcos [Member] | AEP Transmission Co [Member] | Other Revenues [Member] |  |  |  |  |  |  |  |  |  |  |  |
Reportable Segment Information |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Contracts with Customers |  | 0.4 |  |  |  |  |  | 2.8 |  |  |  |
State Transcos [Member] | AEP Transmission Co [Member] | Transmission [Member] |  |  |  |  |  |  |  |  |  |  |  |
Reportable Segment Information |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Contracts with Customers |  | 97.0 |  |  | 87.4 |  |  | 194.0 |  | 176.4 |  |
AEPTCo Parent [Member] | AEP Transmission Co [Member] |  |  |  |  |  |  |  |  |  |  |  |
Reportable Segment Information |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Contracts with Customers |  | 0.0 |  |  | 0.0 |  |  | 0.0 |  | 0.0 |  |
Revenues |  | 0.0 |  |  | 0.0 |  |  | 0.0 |  | 0.0 |  |
Net Income (Loss) | [20] | 0.5 |  |  | 1.5 |  |  | 0.0 |  | 2.6 |  |
Balance Sheet Information |  |  |  |  |  |  |  |  |  |  |  |
Total Assets | [21] | 5,942.2 |  |  |  |  |  | 5,942.2 |  |  |  | $ 5,486.6
AEPTCo Parent [Member] | AEP Transmission Co [Member] | Related Party |  |  |  |  |  |  |  |  |  |  |  |
Reportable Segment Information |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Contracts with Customers |  | 0.0 |  |  | $ 0.0 |  |  | 0.0 |  | $ 0.0 |  |
AEPTCo Parent [Member] | AEP Transmission Co [Member] | Other Revenues [Member] |  |  |  |  |  |  |  |  |  |  |  |
Reportable Segment Information |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Contracts with Customers |  | $ 0.0 |  |  |  |  |  | $ 0.0 |  |  |  |
[1] | Amount includes Assets Held for Sale on the balance sheet. See “Planned Disposition of AEP OnSite Partners” section of Note 6 for additional information.
[2] | Amounts reclassified to the referenced line item on the statements of income.
[3] | Amounts include affiliated and nonaffiliated revenues.
[4] | Generation & Marketing includes economic hedge activity.
[5] | Generation & Marketing includes economic hedge activity.
[6] | Amounts include affiliated and nonaffiliated revenues
[7] | Amounts include affiliated and nonaffiliated revenues.
[8] | Generation & Marketing includes economic hedge activity.
[9] | Generation & Marketing includes economic hedge activity.
[10] | Amounts include affiliated and nonaffiliated revenues
[11] | Amounts include affiliated and nonaffiliated revenues.
[12] | Amounts include affiliated and nonaffiliated revenues.
[13] | Amounts include affiliated and nonaffiliated revenues.
[14] | Amounts include affiliated and nonaffiliated revenues.
[15] | Reconciling Adjustments for Total Assets primarily include elimination of intercompany advances to affiliates and intercompany accounts receivable.
[16] | Represents inter-segment revenues.
[17] | Primarily relates to the elimination of Notes Receivable from the State Transcos.
[18] | 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.
[19] | Includes elimination of Parent’s investments in wholly-owned subsidiary companies.
[20] | Includes the elimination of AEPTCo Parent’s equity earnings in the State Transcos.
[21] | Primarily relates to Notes Receivable from the State Transcos.

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- Definition Revenue from Contract with Customers, Net of Provisions for Refund, Including Assessed Tax + References No definition available. + Details
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Namespace Prefix: | aep_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Revenues from Related Parties, Net of Provisions for Refund + References No definition available. + Details
Name: | aep_RevenuesFromRelatedPartiesNetOfProvisionsForRefund
Namespace Prefix: | aep_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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