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BUSINESS SEGMENTS - Schedule of AEP's Reportable Segment Information (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Revenues from: |  |  |
Total Revenues | $ 19,721.3 | $ 18,982.3 | $ 19,639.5
Purchased Electricity, Fuel and Other Consumables Used for Electric Generation | 5,936.3 | 6,578.3 | 7,097.9
Other Operation and Maintenance | 4,452.7 | 4,086.8 | 4,127.5
Loss on the Expected Sale of the Kentucky Operations | 0.0 | 0.0 | 363.3
Asset Impairments and Other Related Charges | 142.5 | 85.6 | 48.8
Loss on the Sale of the Competitive Contracted Renewables Portfolio | 0.0 | 92.7 | 0.0
Gain on the Sale of Mineral Rights | 0.0 | 0.0 | (116.3)
Depreciation and Amortization | 3,289.9 | 3,090.4 | 3,202.8
Taxes Other Than Income Taxes | 1,596.3 | 1,492.3 | 1,469.8
Allowance for Equity Funds Used During Construction | 211.0 | 174.9 | 133.7
Interest Expense | 1,862.8 | 1,806.9 | 1,396.1
Income Tax Expense (Benefit) | (39.2) | 54.6 | 5.4
Equity Earnings (Loss) of Unconsolidated Subsidiaries | 93.7 | 58.5 | (109.4)
Other Segment Items | (182.4) | (280.0) | (238.7)
EARNINGS ATTRIBUTABLE TO COMMON SHAREHOLDERS, Basic | 2,967.1 | 2,208.1 | 2,307.2
EARNINGS ATTRIBUTABLE TO COMMON SHAREHOLDERS, Diluted | 2,967.1 | 2,208.1 | 2,307.2
Gross Property Additions | 8,030.2 | 7,533.5 | 7,879.0
Total Assets | 103,078.0 | 96,684.0 |
Investments in Equity Method Investees | 1,055.9 | 1,073.6 | 1,276.7
Related Party |  |  |
Revenues from: |  |  |
Total Revenues | 0.0 | 0.0 | 0.0
Operating Segments |  |  |
Revenues from: |  |  |
Total Revenues | 21,500.5 | 20,523.5 | 21,133.4
Purchased Electricity, Fuel and Other Consumables Used for Electric Generation | 6,247.7 | 6,852.9 | 7,279.5
Other Operation and Maintenance | 5,986.8 | 5,433.4 | 5,435.8
Loss on the Expected Sale of the Kentucky Operations |  |  | 0.0
Asset Impairments and Other Related Charges | 142.5 | 85.6 | 24.9
Loss on the Sale of the Competitive Contracted Renewables Portfolio |  | 92.7 |
Gain on the Sale of Mineral Rights |  |  | (116.3)
Depreciation and Amortization | 3,310.7 | 3,106.4 | 3,201.9
Taxes Other Than Income Taxes | 1,576.4 | 1,477.2 | 1,453.5
Allowance for Equity Funds Used During Construction | 211.0 | 174.9 | 133.7
Interest Expense | 1,368.7 | 1,406.7 | 1,200.0
Income Tax Expense (Benefit) | 112.9 | 138.1 | 133.6
Equity Earnings (Loss) of Unconsolidated Subsidiaries | 100.1 | 67.8 | (107.0)
Other Segment Items | (192.4) | (292.5) | (297.6)
EARNINGS ATTRIBUTABLE TO COMMON SHAREHOLDERS, Basic | 3,258.3 | 2,465.7 | 2,844.8
EARNINGS ATTRIBUTABLE TO COMMON SHAREHOLDERS, Diluted | 3,258.3 | 2,465.7 | 2,844.8
Gross Property Additions | 7,594.7 | 7,495.5 | 7,881.9
Total Assets | 101,506.6 | 95,814.6 |
Investments in Equity Method Investees | 1,007.2 | 1,019.4 | 1,209.0
Operating Segments | Nonrelated Party |  |  |
Revenues from: |  |  |
Total Revenues | 19,663.3 | 18,921.6 | 19,588.8
Operating Segments | Related Party |  |  |
Revenues from: |  |  |
Total Revenues | 1,837.2 | 1,601.9 | 1,544.6
Corporate and Other |  |  |
Revenues from: |  |  |
Total Revenues | 183.1 | 168.0 | 109.9
Purchased Electricity, Fuel and Other Consumables Used for Electric Generation | 0.0 | 0.0 | 0.0
Other Operation and Maintenance | 136.3 | 103.1 | 130.0
Loss on the Expected Sale of the Kentucky Operations |  |  | 363.3
Asset Impairments and Other Related Charges | 0.0 | 0.0 | 23.9
Loss on the Sale of the Competitive Contracted Renewables Portfolio |  | 0.0 |
Gain on the Sale of Mineral Rights |  |  | 0.0
Depreciation and Amortization | (20.8) | (16.0) | 0.9
Taxes Other Than Income Taxes | 0.4 | 0.2 | 0.2
Allowance for Equity Funds Used During Construction | 0.0 | 0.0 | 0.0
Interest Expense | 612.5 | 594.7 | 308.9
Income Tax Expense (Benefit) | (152.1) | (83.5) | (128.2)
Equity Earnings (Loss) of Unconsolidated Subsidiaries | (6.4) | (9.3) | (2.4)
Other Segment Items | (108.4) | (182.2) | (53.9)
EARNINGS ATTRIBUTABLE TO COMMON SHAREHOLDERS, Basic | (291.2) | (257.6) | (537.6)
EARNINGS ATTRIBUTABLE TO COMMON SHAREHOLDERS, Diluted | (291.2) | (257.6) | (537.6)
Gross Property Additions | 466.6 | 36.6 | 25.9
Total Assets | 5,550.8 | 5,194.0 |
Investments in Equity Method Investees | 48.7 | 54.2 | 67.7
Corporate and Other | Nonrelated Party |  |  |
Revenues from: |  |  |
Total Revenues | 58.0 | 60.7 | 50.7
Corporate and Other | Related Party |  |  |
Revenues from: |  |  |
Total Revenues | 125.1 | 107.3 | 59.2
Reconciling Adjustments |  |  |
Revenues from: |  |  |
Total Revenues | (1,962.3) | (1,709.2) | (1,603.8)
Purchased Electricity, Fuel and Other Consumables Used for Electric Generation | (311.4) | (274.6) | (181.6)
Other Operation and Maintenance | (1,670.4) | (1,449.7) | (1,438.3)
Loss on the Expected Sale of the Kentucky Operations |  |  | 0.0
Asset Impairments and Other Related Charges | 0.0 | 0.0 | 0.0
Loss on the Sale of the Competitive Contracted Renewables Portfolio |  | 0.0 |
Gain on the Sale of Mineral Rights |  |  | 0.0
Depreciation and Amortization | 0.0 | 0.0 | 0.0
Taxes Other Than Income Taxes | 19.5 | 14.9 | 16.1
Allowance for Equity Funds Used During Construction | 0.0 | 0.0 | 0.0
Interest Expense | (118.4) | (194.5) | (112.8)
Income Tax Expense (Benefit) | 0.0 | 0.0 | 0.0
Equity Earnings (Loss) of Unconsolidated Subsidiaries | 0.0 | 0.0 | 0.0
Other Segment Items | 118.4 | 194.7 | 112.8
EARNINGS ATTRIBUTABLE TO COMMON SHAREHOLDERS, Basic | 0.0 | 0.0 | 0.0
EARNINGS ATTRIBUTABLE TO COMMON SHAREHOLDERS, Diluted | 0.0 | 0.0 | 0.0
Gross Property Additions | (31.1) | 1.4 | (28.8)
Total Assets | (3,979.4) | (4,324.6) |
Investments in Equity Method Investees | 0.0 | 0.0 | 0.0
Reconciling Adjustments | Nonrelated Party |  |  |
Revenues from: |  |  |
Total Revenues | 0.0 | 0.0 | 0.0
Reconciling Adjustments | Related Party |  |  |
Revenues from: |  |  |
Total Revenues | (1,962.3) | (1,709.2) | (1,603.8)
VIU | Operating Segments |  |  |
Revenues from: |  |  |
Total Revenues | 11,596.6 | 11,449.5 | 11,477.5
Purchased Electricity, Fuel and Other Consumables Used for Electric Generation | 3,796.2 | 4,150.3 | 4,007.9
Other Operation and Maintenance | 3,528.0 | 3,211.1 | 3,287.2
Loss on the Expected Sale of the Kentucky Operations |  |  | 0.0
Asset Impairments and Other Related Charges | 13.4 | 85.6 | 24.9
Loss on the Sale of the Competitive Contracted Renewables Portfolio |  | 0.0 |
Gain on the Sale of Mineral Rights |  |  | 0.0
Depreciation and Amortization | 1,970.6 | 1,876.4 | 2,007.2
Taxes Other Than Income Taxes | 535.3 | 512.5 | 504.9
Allowance for Equity Funds Used During Construction | 52.4 | 46.3 | 29.5
Interest Expense | 724.3 | 764.5 | 650.9
Income Tax Expense (Benefit) | (282.2) | (45.2) | (93.8)
Equity Earnings (Loss) of Unconsolidated Subsidiaries | 1.4 | 1.4 | 1.4
Other Segment Items | (88.4) | (148.4) | (172.8)
EARNINGS ATTRIBUTABLE TO COMMON SHAREHOLDERS, Basic | 1,453.2 | 1,090.4 | 1,292.0
EARNINGS ATTRIBUTABLE TO COMMON SHAREHOLDERS, Diluted | 1,453.2 | 1,090.4 | 1,292.0
Gross Property Additions | 3,643.5 | 3,486.8 | 4,164.6
Total Assets | 54,996.5 | 51,802.1 |
Investments in Equity Method Investees | 9.1 | 10.0 | 10.1
VIU | Operating Segments | Nonrelated Party |  |  |
Revenues from: |  |  |
Total Revenues | 11,414.0 | 11,303.7 | 11,292.8
VIU | Operating Segments | Related Party |  |  |
Revenues from: |  |  |
Total Revenues | 182.6 | 145.8 | 184.7
T&D | Operating Segments |  |  |
Revenues from: |  |  |
Total Revenues | 5,907.7 | 5,713.3 | 5,512.0
Purchased Electricity, Fuel and Other Consumables Used for Electric Generation | 909.1 | 1,214.8 | 1,287.3
Other Operation and Maintenance | 2,166.1 | 1,947.8 | 1,864.2
Loss on the Expected Sale of the Kentucky Operations |  |  | 0.0
Asset Impairments and Other Related Charges | 52.9 | 0.0 | 0.0
Loss on the Sale of the Competitive Contracted Renewables Portfolio |  | 0.0 |
Gain on the Sale of Mineral Rights |  |  | 0.0
Depreciation and Amortization | 879.5 | 784.7 | 746.7
Taxes Other Than Income Taxes | 724.2 | 668.0 | 659.9
Allowance for Equity Funds Used During Construction | 69.2 | 45.5 | 33.6
Interest Expense | 405.5 | 363.6 | 328.0
Income Tax Expense (Benefit) | 154.5 | 140.2 | 116.9
Equity Earnings (Loss) of Unconsolidated Subsidiaries | (1.1) | 0.0 | 0.6
Other Segment Items | (41.7) | (59.0) | (52.5)
EARNINGS ATTRIBUTABLE TO COMMON SHAREHOLDERS, Basic | 725.7 | 698.7 | 595.7
EARNINGS ATTRIBUTABLE TO COMMON SHAREHOLDERS, Diluted | 725.7 | 698.7 | 595.7
Gross Property Additions | 2,343.6 | 2,467.4 | 2,177.3
Total Assets | 26,864.3 | 24,838.4 |
Investments in Equity Method Investees | 2.0 | 3.0 | 3.0
T&D | Operating Segments | Nonrelated Party |  |  |
Revenues from: |  |  |
Total Revenues | 5,879.6 | 5,677.2 | 5,489.6
T&D | Operating Segments | Related Party |  |  |
Revenues from: |  |  |
Total Revenues | 28.1 | 36.1 | 22.4
AEPTHCo | Operating Segments |  |  |
Revenues from: |  |  |
Total Revenues | 1,950.8 | 1,728.5 | 1,677.0
Purchased Electricity, Fuel and Other Consumables Used for Electric Generation | 0.0 | 0.0 | 0.0
Other Operation and Maintenance | 162.8 | 141.6 | 165.7
Loss on the Expected Sale of the Kentucky Operations |  |  | 0.0
Asset Impairments and Other Related Charges | 0.0 | 0.0 | 0.0
Loss on the Sale of the Competitive Contracted Renewables Portfolio |  | 0.0 |
Gain on the Sale of Mineral Rights |  |  | 0.0
Depreciation and Amortization | 439.7 | 402.6 | 355.0
Taxes Other Than Income Taxes | 314.9 | 290.1 | 277.6
Allowance for Equity Funds Used During Construction | 89.4 | 83.1 | 70.6
Interest Expense | 222.3 | 202.6 | 169.3
Income Tax Expense (Benefit) | 214.7 | 166.0 | 193.6
Equity Earnings (Loss) of Unconsolidated Subsidiaries | 98.9 | 82.9 | 83.4
Other Segment Items | (5.5) | (11.3) | (3.7)
EARNINGS ATTRIBUTABLE TO COMMON SHAREHOLDERS, Basic | 790.2 | 702.9 | 673.5
EARNINGS ATTRIBUTABLE TO COMMON SHAREHOLDERS, Diluted | 790.2 | 702.9 | 673.5
Gross Property Additions | 1,572.5 | 1,528.7 | 1,470.8
Total Assets | 18,011.9 | 16,575.6 |
Investments in Equity Method Investees | 996.1 | 905.8 | 858.3
AEPTHCo | Operating Segments | Nonrelated Party |  |  |
Revenues from: |  |  |
Total Revenues | 425.0 | 397.4 | 357.5
AEPTHCo | Operating Segments | Related Party |  |  |
Revenues from: |  |  |
Total Revenues | 1,525.8 | 1,331.1 | 1,319.5
G&M |  |  |
Revenues from: |  |  |
Loss on the Sale of the Competitive Contracted Renewables Portfolio |  | 93.0 |
G&M | Operating Segments |  |  |
Revenues from: |  |  |
Total Revenues | 2,045.4 | 1,632.2 | 2,466.9
Purchased Electricity, Fuel and Other Consumables Used for Electric Generation | 1,542.4 | 1,487.8 | 1,984.3
Other Operation and Maintenance | 129.9 | 132.9 | 118.7
Loss on the Expected Sale of the Kentucky Operations |  |  | 0.0
Asset Impairments and Other Related Charges | 76.2 | 0.0 | 0.0
Loss on the Sale of the Competitive Contracted Renewables Portfolio |  | 92.7 |
Gain on the Sale of Mineral Rights |  |  | (116.3)
Depreciation and Amortization | 20.9 | 42.7 | 93.0
Taxes Other Than Income Taxes | 2.0 | 6.6 | 11.1
Allowance for Equity Funds Used During Construction | 0.0 | 0.0 | 0.0
Interest Expense | 16.6 | 76.0 | 51.8
Income Tax Expense (Benefit) | 25.9 | (122.9) | (83.1)
Equity Earnings (Loss) of Unconsolidated Subsidiaries | 0.9 | (16.5) | (192.4)
Other Segment Items | (56.8) | (73.8) | (68.6)
EARNINGS ATTRIBUTABLE TO COMMON SHAREHOLDERS, Basic | 289.2 | (26.3) | 283.6
EARNINGS ATTRIBUTABLE TO COMMON SHAREHOLDERS, Diluted | 289.2 | (26.3) | 283.6
Gross Property Additions | 35.1 | 12.6 | 69.2
Total Assets | 1,633.9 | 2,598.5 |
Investments in Equity Method Investees | 0.0 | 100.6 | 337.6
G&M | Operating Segments | Nonrelated Party |  |  |
Revenues from: |  |  |
Total Revenues | 1,944.7 | 1,543.3 | 2,448.9
G&M | Operating Segments | Related Party |  |  |
Revenues from: |  |  |
Total Revenues | $ 100.7 | $ 88.9 | $ 18.0

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