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CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2025
Mar. 31, 2025
Jun. 30, 2024
Mar. 31, 2024
Jun. 30, 2025
Jun. 30, 2024
Statement of Comprehensive Income [Abstract]            
Net Income $ 1,288.3 $ 802.2 $ 342.5 $ 1,005.7 $ 2,090.5 $ 1,348.2
OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAXES            
Cash Flow Hedges, Net of Tax (33.2)   22.4   (10.1) 16.2
Amortization of Pension and OPEB Deferred Costs, Net of Tax 0.3   (0.1)   0.6 (0.7)
TOTAL OTHER COMPREHENSIVE INCOME (LOSS) (32.9) $ 23.4 22.3 $ (6.8) (9.5) 15.5
TOTAL COMPREHENSIVE INCOME 1,255.4   364.8   2,081.0 1,363.7
Total Comprehensive Income Attributable To Noncontrolling Interests 62.5   2.2   64.5 4.8
TOTAL COMPREHENSIVE INCOME ATTRIBUTABLE TO AEP COMMON SHAREHOLDERS $ 1,192.9   $ 362.6   $ 2,016.5 $ 1,358.9