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Goodwill and Other Intangible Assets (Intangible Assets) (Details) - USD ($)
 3 Months Ended 12 Months Ended
Dec. 31, 2022
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Sep. 30, 2024
Jun. 30, 2024
Finite-Lived Intangible Assets, Net [Abstract]            
Gross Balance   $ 2,346,000,000 $ 2,691,000,000      
Accumulated Amortization   (426,000,000) (498,000,000)   $ 426 $ 420
Net Balance   1,920,000,000 2,193,000,000      
Indefinite-lived Intangible Assets (Excluding Goodwill)   27,000,000 50,000,000      
Indefinite- lived intangible assets, Amortization   0 0      
Other Intangible Assets, Net   1,947,000,000        
Intangible Assets, Gross   2,373,000,000 2,741,000,000      
Intangible Assets, Net $ 1,841,000,000 1,947,000,000 2,243,000,000 $ 1,841,000,000 $ 1,928,000,000 $ 1,879,000,000
Goodwill impairment expense   0 12,000,000 777,000,000    
Goodwill impairment expense   0 12,000,000 $ 777,000,000    
Operating Segments [Member] | AES Andes            
Finite-Lived Intangible Assets, Net [Abstract]            
Goodwill impairment expense 644,000,000          
Goodwill impairment expense $ 644,000,000          
Land Use Rights [Member]            
Finite-Lived Intangible Assets, Net [Abstract]            
Indefinite-lived Intangible Assets (Excluding Goodwill)   8,000,000 22,000,000      
Indefinite- lived intangible assets, Amortization   0 0      
Transmission Rights [Member]            
Finite-Lived Intangible Assets, Net [Abstract]            
Indefinite-lived Intangible Assets (Excluding Goodwill)   17,000,000 20,000,000      
Indefinite- lived intangible assets, Amortization   0 0      
Other            
Finite-Lived Intangible Assets, Net [Abstract]            
Indefinite-lived Intangible Assets (Excluding Goodwill)   2,000,000 8,000,000      
Indefinite- lived intangible assets, Amortization   0 0      
Computer Software, Intangible Asset [Member]            
Finite-Lived Intangible Assets, Net [Abstract]            
Gross Balance   794,000,000 696,000,000      
Accumulated Amortization   333,000,000 324,000,000      
Net Balance   461,000,000 372,000,000      
Emission allowances [Member]            
Finite-Lived Intangible Assets, Net [Abstract]            
Gross Balance   1,000,000 50,000,000      
Accumulated Amortization   0 0      
Net Balance   1,000,000 50,000,000      
Project Development Rights [Member]            
Finite-Lived Intangible Assets, Net [Abstract]            
Gross Balance   1,328,000,000 1,222,000,000      
Accumulated Amortization   37,000,000 43,000,000      
Net Balance   1,291,000,000 1,179,000,000      
Contracts            
Finite-Lived Intangible Assets, Net [Abstract]            
Gross Balance   68,000,000 337,000,000      
Accumulated Amortization   29,000,000 37,000,000      
Net Balance   39,000,000 300,000,000      
Other            
Finite-Lived Intangible Assets, Net [Abstract]            
Gross Balance   28,000,000 45,000,000      
Accumulated Amortization   5,000,000 20,000,000      
Net Balance   23,000,000 25,000,000      
Compensation from Concession Agreement            
Finite-Lived Intangible Assets, Net [Abstract]            
Gross Balance   19,000,000 222,000,000      
Accumulated Amortization   19,000,000 71,000,000      
Net Balance   0 151,000,000      
Land Use Rights [Member]            
Finite-Lived Intangible Assets, Net [Abstract]            
Gross Balance   108,000,000 119,000,000      
Accumulated Amortization   3,000,000 3,000,000      
Net Balance   $ 105,000,000 $ 116,000,000