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Redeemable Stocks of Subsidiaries (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Dec. 31, 2024
Dec. 31, 2023
Temporary Equity [Line Items]        
Redeemable Noncontrolling Interest, Equity, Carrying Amount $ 899   $ 938  
Temporary Equity, Interest in Subsidiary Earnings 0 $ 26    
Temporary Equity, Stock Issued During Period, Value, New Issues 0      
Reclassifications of Temporary to Permanent Equity (38) 0    
Redeemable Preferred Stock Dividends (31) (14)    
Temporary Equity, Including Noncontrolling Interest 899 1,502 938 $ 1,464
Temporary Equity, Net Income 30 (89)    
Temporary Equity, Adjustments to redemption value of redeemable stock of subsidiaries 0 6    
Other Comprehensive Income (Loss)        
Temporary Equity [Line Items]        
Temporary Equity, Other Charges 0 35    
IPALCO Enterprises, Inc. [Member]        
Temporary Equity [Line Items]        
Redeemable Noncontrolling Interest, Equity, Common, Carrying Amount 836   835  
AES Clean Energy Development        
Temporary Equity [Line Items]        
Redeemable Noncontrolling Interest, Equity, Common, Carrying Amount 63   65  
Temporary Equity, Stock Issued During Period, Value, New Issues   $ 74    
AES Indiana Pike County BESS        
Temporary Equity [Line Items]        
Redeemable Noncontrolling Interest, Equity, Common, Carrying Amount 0   $ 38  
Reclassifications of Temporary to Permanent Equity $ 38