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Debt - Non-Recourse Debt Narrative (Details)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2026
USD ($)
Jun. 30, 2025
USD ($)
Mar. 31, 2025
USD ($)
Rate
Mar. 31, 2024
USD ($)
Jun. 30, 2026
USD ($)
Jun. 30, 2025
USD ($)
Dec. 31, 2025
USD ($)
Dec. 31, 2024
USD ($)
Dec. 31, 2021
agreement
Debt Instrument [Line Items]                  
Proceeds From Issuance Of Nonrecourse Debt         $ 1,424 $ 2,332      
Loss on extinguishment of debt $ (6) $ (5)     (14) $ (13)      
Restricted Net Assets 2,000       2,000        
Restricted Cash And Debt Service Reserves 583       583   $ 531    
Restricted Cash Held for Insurance 159       159   153    
Materiality Threshold for Sub Default to Trigger Cross Default 200       200        
Number of Credit Agreements | agreement                 2
Restricted Cash [Member]                  
Debt Instrument [Line Items]                  
Restricted Cash And Debt Service Reserves 330       330   451    
Debt Service Reserves [Member]                  
Debt Instrument [Line Items]                  
Restricted Cash And Debt Service Reserves 40       40   80    
Nonrecourse [Member]                  
Debt Instrument [Line Items]                  
Restricted Cash And Debt Service Reserves 370       370        
Long-Term Debt 22,855       22,855   21,681    
Consolidated Variable Interest Entities [Member]                  
Debt Instrument [Line Items]                  
Restricted Cash And Debt Service Reserves 260       260        
Variable Rate [Domain] | Notes Payable to Banks                  
Debt Instrument [Line Items]                  
Non-recourse debt 2,000       2,000        
Notes Payable to Banks | Variable Rate [Domain]                  
Debt Instrument [Line Items]                  
Non-recourse debt 11,700       11,700        
Clean Energy | Nonrecourse [Member]                  
Debt Instrument [Line Items]                  
Credit Facility, Commitments Used 513       513        
Credit facility, commitments 2,200       2,200        
AES Clean Energy Subsidiary | Nonrecourse [Member]                  
Debt Instrument [Line Items]                  
Proceeds from Issuance of Debt         689        
AES Clean Energy Subsidiary | Revolving Credit Facilities, Joint and Several                  
Debt Instrument [Line Items]                  
Credit Facility, Commitments Used 2,500       2,500        
AES Clean Energy and sPower (co-issuers) | Master Indenture Notes | Nonrecourse [Member]                  
Debt Instrument [Line Items]                  
Long-Term Debt 3,300       3,300        
AES Clean Energy Development | Revolving Credit Facilities, Joint and Several                  
Debt Instrument [Line Items]                  
Line of Credit Facility, Increase (Decrease), Net         841        
Credit Facility, Commitments Used 2,600       2,600        
AES Clean Energy Development | Bellefield Financing Agreement due 2026 | Nonrecourse [Member]                  
Debt Instrument [Line Items]                  
Credit Facility, Commitments Used 1,400       1,400        
Credit facility, commitments               $ 1,700  
AES Clean Energy Development | Senior Notes [Member] | Master Indenture Notes                  
Debt Instrument [Line Items]                  
Subordinated Liabilities, Period Increase (Decrease)         34        
AES Clean Energy and sPower (co-borrowers) | Revolving Credit Facilities, Joint and Several                  
Debt Instrument [Line Items]                  
Issued senior notes 4,000       4,000        
AES Clean Energy and sPower (co-borrowers) | Master Indenture Notes | Nonrecourse [Member]                  
Debt Instrument [Line Items]                  
Long-Term Debt 2,500       2,500        
AES Puerto Rico | Nonrecourse Debt [Member] | PR Series A Bond due 2026                  
Debt Instrument [Line Items]                  
Issued senior notes       $ 156          
Debt Instrument, Interest Rate, Stated Percentage       6.625%          
Preferred Shares Conversion Option       0.999          
AES Puerto Rico | Nonrecourse Debt [Member] | PR Senior Secured Bonds due 2028                  
Debt Instrument [Line Items]                  
Issued senior notes       $ 112          
Debt Instrument, Interest Rate, Stated Percentage       6.625%          
AES Puerto Rico | Nonrecourse Debt [Member] | Preferred Shares in AES Guayama Holdings                  
Debt Instrument [Line Items]                  
Issued senior notes       $ 44          
Debt Instrument, Interest Rate, Stated Percentage       3.125%          
AES Andes | Andes Senior Notes due 2032 | Nonrecourse [Member]                  
Debt Instrument [Line Items]                  
Debt Instrument, Interest Rate, Stated Percentage     6.25%            
Proceeds from Issuance of Debt     $ 400            
AES Andes | Andes Senior Notes due 2079 | Nonrecourse [Member]                  
Debt Instrument [Line Items]                  
Loss on extinguishment of debt     $ 3            
Debt Instrument, Interest Rate, Stated Percentage | Rate     6.35%            
Proceeds from Issuance of Debt     $ 228            
AES Puerto Rico Solar                  
Debt Instrument [Line Items]                  
Loan Guarantee from government               861  
Outstanding Borrowings               877  
AES Puerto Rico Solar | Puerto Rico Solar Tax Credit Transfer Bridge Loan Agreement | Nonrecourse [Member]                  
Debt Instrument [Line Items]                  
Issued senior notes 230       230        
Line of Credit Facility, Remaining Borrowing Capacity $ 212       $ 212        
AES Puerto Rico Solar | Puerto Rico Solar Tax Credit Transfer Bridge Loan Agreement | Nonrecourse [Member] | Minimum [Member]                  
Debt Instrument [Line Items]                  
Debt Instrument, Interest Rate, Effective Percentage 1.25%       1.25%        
AES Puerto Rico Solar | Puerto Rico Solar Tax Credit Transfer Bridge Loan Agreement | Nonrecourse [Member] | Maximum [Member]                  
Debt Instrument [Line Items]                  
Debt Instrument, Interest Rate, Effective Percentage 2.25%       2.25%        
AES Pacifico                  
Debt Instrument [Line Items]                  
Line of Credit Facility, Remaining Borrowing Capacity               $ 1,300  
AES Pacifico | Nonrecourse [Member]                  
Debt Instrument [Line Items]                  
Issued senior notes             $ 1,700    
AES Pacifico Chile | Nonrecourse [Member]                  
Debt Instrument [Line Items]                  
Proceeds from Issuance of Debt         $ 407