BUSINESS SEGMENTS - Schedule of AEP's Reportable Segment Information (Details) - USD ($)
$ in Millions |
3 Months Ended |
6 Months Ended |
|
Jun. 30, 2025 |
Jun. 30, 2024 |
Jun. 30, 2025 |
Jun. 30, 2024 |
Dec. 31, 2024 |
| Reportable Segment Information |
|
|
|
|
|
| Total Revenues |
$ 5,086.9
|
$ 4,579.2
|
$ 10,550.3
|
$ 9,604.9
|
|
| Purchased Electricity, Fuel and Other Consumables Used for Electric Generation |
1,541.4
|
1,368.5
|
3,394.3
|
2,944.3
|
|
| Other Operation and Maintenance |
928.3
|
1,168.8
|
1,999.2
|
2,248.6
|
|
| Asset Impairments and Other Related Charges |
0.0
|
142.5
|
0.0
|
142.5
|
|
| Depreciation and Amortization |
853.1
|
821.9
|
1,686.5
|
1,609.0
|
|
| Taxes Other Than Income Taxes |
365.0
|
393.6
|
787.0
|
804.0
|
|
| Allowance for Equity Funds Used During Construction |
57.1
|
55.2
|
114.4
|
98.8
|
|
| Interest Expense |
489.5
|
465.6
|
984.4
|
901.2
|
|
| Income Tax Expense (Benefit) |
(250.9)
|
6.7
|
(125.4)
|
(135.2)
|
|
| Equity Earnings of Unconsolidated Subsidiaries |
20.6
|
25.2
|
58.8
|
49.7
|
|
| Other Segment Items |
12.4
|
(48.3)
|
(28.5)
|
(104.4)
|
|
| Earnings Attributable to AEP Common Shareholders, Basic |
1,225.8
|
340.3
|
2,026.0
|
1,343.4
|
|
| Earnings Attributable to AEP Common Shareholders, Diluted |
1,225.8
|
340.3
|
2,026.0
|
1,343.4
|
|
| Gross Property Additions |
3,279.3
|
1,556.6
|
5,379.5
|
3,318.3
|
|
| Assets |
107,778.5
|
|
107,778.5
|
|
$ 103,078.0
|
| Equity Method Investments |
1,114.2
|
|
1,114.2
|
|
1,055.9
|
| Nonrelated Party |
|
|
|
|
|
| Reportable Segment Information |
|
|
|
|
|
| Total Revenues |
5,086.9
|
4,579.2
|
10,550.3
|
9,604.9
|
|
| Related Party |
|
|
|
|
|
| Reportable Segment Information |
|
|
|
|
|
| Total Revenues |
0.0
|
0.0
|
0.0
|
0.0
|
|
| Operating Segments |
|
|
|
|
|
| Reportable Segment Information |
|
|
|
|
|
| Total Revenues |
5,788.2
|
5,012.3
|
11,741.5
|
10,511.2
|
|
| Purchased Electricity, Fuel and Other Consumables Used for Electric Generation |
1,617.6
|
1,446.1
|
3,538.3
|
3,123.1
|
|
| Other Operation and Maintenance |
1,567.6
|
1,562.0
|
3,095.9
|
3,035.1
|
|
| Asset Impairments and Other Related Charges |
|
142.5
|
|
142.5
|
|
| Depreciation and Amortization |
858.2
|
827.1
|
1,696.6
|
1,619.5
|
|
| Taxes Other Than Income Taxes |
359.7
|
388.6
|
774.8
|
794.3
|
|
| Allowance for Equity Funds Used During Construction |
57.1
|
55.2
|
114.4
|
98.8
|
|
| Interest Expense |
361.7
|
344.2
|
732.8
|
660.5
|
|
| Income Tax Expense (Benefit) |
(206.6)
|
32.4
|
(24.8)
|
(62.9)
|
|
| Equity Earnings of Unconsolidated Subsidiaries |
22.9
|
26.5
|
47.7
|
50.4
|
|
| Other Segment Items |
12.9
|
(57.3)
|
(32.8)
|
(117.5)
|
|
| Earnings Attributable to AEP Common Shareholders, Basic |
1,297.1
|
408.4
|
2,122.8
|
1,465.8
|
|
| Earnings Attributable to AEP Common Shareholders, Diluted |
1,297.1
|
408.4
|
2,122.8
|
1,465.8
|
|
| Gross Property Additions |
3,282.7
|
1,563.0
|
5,341.5
|
3,316.6
|
|
| Assets |
106,038.7
|
|
106,038.7
|
|
101,506.6
|
| Equity Method Investments |
1,049.3
|
|
1,049.3
|
|
1,007.2
|
| Operating Segments | Nonrelated Party |
|
|
|
|
|
| Reportable Segment Information |
|
|
|
|
|
| Total Revenues |
5,083.2
|
4,552.0
|
10,530.7
|
9,562.8
|
|
| Operating Segments | Related Party |
|
|
|
|
|
| Reportable Segment Information |
|
|
|
|
|
| Total Revenues |
705.0
|
460.3
|
1,210.8
|
948.4
|
|
| Corporate and Other |
|
|
|
|
|
| Reportable Segment Information |
|
|
|
|
|
| Total Revenues |
29.6
|
57.7
|
74.2
|
110.5
|
|
| Purchased Electricity, Fuel and Other Consumables Used for Electric Generation |
0.0
|
0.0
|
0.0
|
0.0
|
|
| Other Operation and Maintenance |
20.5
|
24.9
|
36.3
|
61.0
|
|
| Asset Impairments and Other Related Charges |
|
0.0
|
|
0.0
|
|
| Depreciation and Amortization |
(5.0)
|
(5.2)
|
(10.1)
|
(10.5)
|
|
| Taxes Other Than Income Taxes |
0.1
|
0.1
|
0.6
|
0.2
|
|
| Allowance for Equity Funds Used During Construction |
0.0
|
0.0
|
0.0
|
0.0
|
|
| Interest Expense |
151.1
|
155.3
|
298.1
|
311.1
|
|
| Income Tax Expense (Benefit) |
(44.3)
|
(25.7)
|
(100.6)
|
(72.3)
|
|
| Equity Earnings of Unconsolidated Subsidiaries |
(2.3)
|
(1.3)
|
11.1
|
(0.7)
|
|
| Other Segment Items |
(23.8)
|
(24.9)
|
(42.2)
|
(57.3)
|
|
| Earnings Attributable to AEP Common Shareholders, Basic |
(71.3)
|
(68.1)
|
(96.8)
|
(122.4)
|
|
| Earnings Attributable to AEP Common Shareholders, Diluted |
(71.3)
|
(68.1)
|
(96.8)
|
(122.4)
|
|
| Gross Property Additions |
5.8
|
6.4
|
35.8
|
9.5
|
|
| Assets |
5,316.2
|
|
5,316.2
|
|
5,550.8
|
| Equity Method Investments |
64.9
|
|
64.9
|
|
48.7
|
| Corporate and Other | Nonrelated Party |
|
|
|
|
|
| Reportable Segment Information |
|
|
|
|
|
| Total Revenues |
3.7
|
27.2
|
19.6
|
42.1
|
|
| Corporate and Other | Related Party |
|
|
|
|
|
| Reportable Segment Information |
|
|
|
|
|
| Total Revenues |
25.9
|
30.5
|
54.6
|
68.4
|
|
| Reconciling Adjustments |
|
|
|
|
|
| Reportable Segment Information |
|
|
|
|
|
| Total Revenues |
(730.9)
|
(490.8)
|
(1,265.4)
|
(1,016.8)
|
|
| Purchased Electricity, Fuel and Other Consumables Used for Electric Generation |
(76.2)
|
(77.6)
|
(144.0)
|
(178.8)
|
|
| Other Operation and Maintenance |
(659.8)
|
(418.1)
|
(1,133.0)
|
(847.5)
|
|
| Asset Impairments and Other Related Charges |
|
0.0
|
|
0.0
|
|
| Depreciation and Amortization |
(0.1)
|
0.0
|
0.0
|
0.0
|
|
| Taxes Other Than Income Taxes |
5.2
|
4.9
|
11.6
|
9.5
|
|
| Allowance for Equity Funds Used During Construction |
0.0
|
0.0
|
0.0
|
0.0
|
|
| Interest Expense |
(23.3)
|
(33.9)
|
(46.5)
|
(70.4)
|
|
| Income Tax Expense (Benefit) |
0.0
|
0.0
|
0.0
|
0.0
|
|
| Equity Earnings of Unconsolidated Subsidiaries |
0.0
|
0.0
|
0.0
|
0.0
|
|
| Other Segment Items |
23.3
|
33.9
|
46.5
|
70.4
|
|
| Earnings Attributable to AEP Common Shareholders, Basic |
0.0
|
0.0
|
0.0
|
0.0
|
|
| Earnings Attributable to AEP Common Shareholders, Diluted |
0.0
|
0.0
|
0.0
|
0.0
|
|
| Gross Property Additions |
(9.2)
|
(12.8)
|
2.2
|
(7.8)
|
|
| Assets |
(3,576.4)
|
|
(3,576.4)
|
|
(3,979.4)
|
| Equity Method Investments |
0.0
|
|
0.0
|
|
0.0
|
| Reconciling Adjustments | Nonrelated Party |
|
|
|
|
|
| Reportable Segment Information |
|
|
|
|
|
| Total Revenues |
0.0
|
0.0
|
0.0
|
0.0
|
|
| Reconciling Adjustments | Related Party |
|
|
|
|
|
| Reportable Segment Information |
|
|
|
|
|
| Total Revenues |
(730.9)
|
(490.8)
|
(1,265.4)
|
(1,016.8)
|
|
| VIU | Operating Segments |
|
|
|
|
|
| Reportable Segment Information |
|
|
|
|
|
| Total Revenues |
3,015.2
|
2,619.0
|
6,153.0
|
5,566.9
|
|
| Purchased Electricity, Fuel and Other Consumables Used for Electric Generation |
920.5
|
870.8
|
1,995.9
|
1,869.9
|
|
| Other Operation and Maintenance |
981.8
|
953.2
|
1,865.2
|
1,838.5
|
|
| Asset Impairments and Other Related Charges |
|
13.4
|
|
13.4
|
|
| Depreciation and Amortization |
531.3
|
486.2
|
1,046.5
|
939.8
|
|
| Taxes Other Than Income Taxes |
122.9
|
132.9
|
256.5
|
272.6
|
|
| Allowance for Equity Funds Used During Construction |
16.0
|
12.8
|
32.4
|
24.5
|
|
| Interest Expense |
201.0
|
190.2
|
401.7
|
347.4
|
|
| Income Tax Expense (Benefit) |
(136.4)
|
(53.7)
|
(91.6)
|
(259.9)
|
|
| Equity Earnings of Unconsolidated Subsidiaries |
0.3
|
0.3
|
0.6
|
0.7
|
|
| Other Segment Items |
(22.3)
|
(26.6)
|
(45.0)
|
(56.1)
|
|
| Earnings Attributable to AEP Common Shareholders, Basic |
432.7
|
65.7
|
756.8
|
626.5
|
|
| Earnings Attributable to AEP Common Shareholders, Diluted |
432.7
|
65.7
|
756.8
|
626.5
|
|
| Gross Property Additions |
2,232.6
|
679.1
|
3,153.2
|
1,480.9
|
|
| Assets |
57,909.4
|
|
57,909.4
|
|
54,996.5
|
| Equity Method Investments |
9.0
|
|
9.0
|
|
9.1
|
| VIU | Operating Segments | Nonrelated Party |
|
|
|
|
|
| Reportable Segment Information |
|
|
|
|
|
| Total Revenues |
2,934.5
|
2,572.0
|
6,020.0
|
5,473.2
|
|
| VIU | Operating Segments | Related Party |
|
|
|
|
|
| Reportable Segment Information |
|
|
|
|
|
| Total Revenues |
80.7
|
47.0
|
133.0
|
93.7
|
|
| T&D | Operating Segments |
|
|
|
|
|
| Reportable Segment Information |
|
|
|
|
|
| Total Revenues |
1,450.2
|
1,435.9
|
2,976.7
|
2,926.1
|
|
| Purchased Electricity, Fuel and Other Consumables Used for Electric Generation |
203.7
|
210.5
|
466.5
|
515.8
|
|
| Other Operation and Maintenance |
541.1
|
520.7
|
1,118.2
|
1,039.9
|
|
| Asset Impairments and Other Related Charges |
|
52.9
|
|
52.9
|
|
| Depreciation and Amortization |
201.5
|
226.9
|
404.4
|
449.4
|
|
| Taxes Other Than Income Taxes |
159.3
|
178.0
|
364.5
|
368.8
|
|
| Allowance for Equity Funds Used During Construction |
19.6
|
19.8
|
38.1
|
33.9
|
|
| Interest Expense |
100.0
|
95.8
|
211.6
|
192.0
|
|
| Income Tax Expense (Benefit) |
50.9
|
35.4
|
84.7
|
66.9
|
|
| Equity Earnings of Unconsolidated Subsidiaries |
0.1
|
(0.7)
|
1.4
|
(0.8)
|
|
| Other Segment Items |
(10.5)
|
(12.0)
|
(22.2)
|
(23.6)
|
|
| Earnings Attributable to AEP Common Shareholders, Basic |
223.9
|
146.8
|
388.5
|
297.1
|
|
| Earnings Attributable to AEP Common Shareholders, Diluted |
223.9
|
146.8
|
388.5
|
297.1
|
|
| Gross Property Additions |
663.7
|
548.8
|
1,367.7
|
1,121.1
|
|
| Assets |
27,526.9
|
|
27,526.9
|
|
26,864.3
|
| Equity Method Investments |
3.5
|
|
3.5
|
|
2.0
|
| T&D | Operating Segments | Nonrelated Party |
|
|
|
|
|
| Reportable Segment Information |
|
|
|
|
|
| Total Revenues |
1,442.6
|
1,428.8
|
2,958.1
|
2,912.0
|
|
| T&D | Operating Segments | Related Party |
|
|
|
|
|
| Reportable Segment Information |
|
|
|
|
|
| Total Revenues |
7.6
|
7.1
|
18.6
|
14.1
|
|
| AEPTHCo | Operating Segments |
|
|
|
|
|
| Reportable Segment Information |
|
|
|
|
|
| Total Revenues |
756.6
|
489.9
|
1,298.7
|
987.2
|
|
| Purchased Electricity, Fuel and Other Consumables Used for Electric Generation |
0.0
|
0.0
|
0.0
|
0.0
|
|
| Other Operation and Maintenance |
45.0
|
45.7
|
82.4
|
82.8
|
|
| Asset Impairments and Other Related Charges |
|
0.0
|
|
0.0
|
|
| Depreciation and Amortization |
121.1
|
108.9
|
237.3
|
217.0
|
|
| Taxes Other Than Income Taxes |
77.2
|
77.2
|
152.8
|
152.2
|
|
| Allowance for Equity Funds Used During Construction |
21.5
|
22.6
|
43.9
|
40.4
|
|
| Interest Expense |
58.7
|
53.3
|
115.6
|
110.2
|
|
| Income Tax Expense (Benefit) |
(139.3)
|
57.0
|
(72.4)
|
111.3
|
|
| Equity Earnings of Unconsolidated Subsidiaries |
22.5
|
26.9
|
45.7
|
49.6
|
|
| Other Segment Items |
59.5
|
(3.4)
|
59.6
|
(5.7)
|
|
| Earnings Attributable to AEP Common Shareholders, Basic |
578.4
|
200.7
|
813.0
|
409.4
|
|
| Earnings Attributable to AEP Common Shareholders, Diluted |
578.4
|
200.7
|
813.0
|
409.4
|
|
| Gross Property Additions |
383.6
|
325.0
|
813.9
|
694.6
|
|
| Assets |
18,705.5
|
|
18,705.5
|
|
18,011.9
|
| Equity Method Investments |
1,036.8
|
|
1,036.8
|
|
996.1
|
| AEPTHCo | Operating Segments | Nonrelated Party |
|
|
|
|
|
| Reportable Segment Information |
|
|
|
|
|
| Total Revenues |
155.1
|
108.7
|
271.0
|
219.2
|
|
| AEPTHCo | Operating Segments | Related Party |
|
|
|
|
|
| Reportable Segment Information |
|
|
|
|
|
| Total Revenues |
601.5
|
381.2
|
1,027.7
|
768.0
|
|
| G&M | Operating Segments |
|
|
|
|
|
| Reportable Segment Information |
|
|
|
|
|
| Total Revenues |
566.2
|
467.5
|
1,313.1
|
1,031.0
|
|
| Purchased Electricity, Fuel and Other Consumables Used for Electric Generation |
493.4
|
364.8
|
1,075.9
|
737.4
|
|
| Other Operation and Maintenance |
(0.3)
|
42.4
|
30.1
|
73.9
|
|
| Asset Impairments and Other Related Charges |
|
76.2
|
|
76.2
|
|
| Depreciation and Amortization |
4.3
|
5.1
|
8.4
|
13.3
|
|
| Taxes Other Than Income Taxes |
0.3
|
0.5
|
1.0
|
0.7
|
|
| Allowance for Equity Funds Used During Construction |
0.0
|
0.0
|
0.0
|
0.0
|
|
| Interest Expense |
2.0
|
4.9
|
3.9
|
10.9
|
|
| Income Tax Expense (Benefit) |
18.2
|
(6.3)
|
54.5
|
18.8
|
|
| Equity Earnings of Unconsolidated Subsidiaries |
0.0
|
0.0
|
0.0
|
0.9
|
|
| Other Segment Items |
(13.8)
|
(15.3)
|
(25.2)
|
(32.1)
|
|
| Earnings Attributable to AEP Common Shareholders, Basic |
62.1
|
(4.8)
|
164.5
|
132.8
|
|
| Earnings Attributable to AEP Common Shareholders, Diluted |
62.1
|
(4.8)
|
164.5
|
132.8
|
|
| Gross Property Additions |
2.8
|
10.1
|
6.7
|
20.0
|
|
| Assets |
1,896.9
|
|
1,896.9
|
|
1,633.9
|
| Equity Method Investments |
0.0
|
|
0.0
|
|
$ 0.0
|
| G&M | Operating Segments | Nonrelated Party |
|
|
|
|
|
| Reportable Segment Information |
|
|
|
|
|
| Total Revenues |
551.0
|
442.5
|
1,281.6
|
958.4
|
|
| G&M | Operating Segments | Related Party |
|
|
|
|
|
| Reportable Segment Information |
|
|
|
|
|
| Total Revenues |
$ 15.2
|
$ 25.0
|
$ 31.5
|
$ 72.6
|
|