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Redeemable Stocks of Subsidiaries (Details) - USD ($)
$ in Millions
6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Dec. 31, 2021
Mar. 31, 2021
Temporary Equity [Line Items]        
Redeemable Noncontrolling Interest, Equity, Carrying Amount $ 1,173   $ 1,257  
Temporary Equity, Other Charges   $ 81    
AIMco        
Temporary Equity [Line Items]        
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners       25.00%
Cajuina Wind Complex        
Temporary Equity [Line Items]        
Noncontrolling Interest, Ownership Percentage by Parent 35.50%      
IPALCO Enterprises, Inc. [Member]        
Temporary Equity [Line Items]        
Redeemable Noncontrolling Interest, Equity, Common, Carrying Amount $ 700   700  
Clean Energy        
Temporary Equity [Line Items]        
Redeemable Noncontrolling Interest, Equity, Common, Carrying Amount 400   497  
IPL Subsidiary [Member]        
Temporary Equity [Line Items]        
Redeemable Noncontrolling Interest, Equity, Preferred, Carrying Amount 60   60  
Potengi        
Temporary Equity [Line Items]        
Redeemable Noncontrolling Interest, Equity, Preferred, Carrying Amount $ 13   $ 0  
Cajuina Wind Complex        
Temporary Equity [Line Items]        
Sale of Stock, Description of Transaction 24      
Sale of Stock, Consideration Received on Transaction $ 12