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Acquisitions and Dispositions (Details) - USD ($)
 3 Months Ended 6 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2024
Jun. 30, 2024
Mar. 31, 2024
Mar. 31, 2023
Jun. 30, 2024
Sep. 30, 2024
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]                  
Gain (Loss) on Disposition of Business $ (1,000,000) $ 1,000,000     $ 44,000,000 $ 43,000,000 $ 351,000,000 $ 134,000,000 $ (9,000,000)
Proceeds from Divestiture of Businesses and Interests in Affiliates         11,000,000 11,000,000 423,000,000 254,000,000 1,000,000
Income (loss) from continuing operations, net of tax 511,000,000         1,219,000,000 1,686,000,000 242,000,000 (546,000,000)
Dispositions and Held-for-Sales Businesses                  
Sale of Stock, Consideration Received on Transaction       $ 63,000,000          
Asset Retirement Obligation, Revision of Estimate             127,000,000 (35,000,000)  
Goodwill 348,000,000 348,000,000     348,000,000 348,000,000 345,000,000 348,000,000 362,000,000
Property, Plant and Equipment, Net 32,354,000,000 30,732,000,000     30,732,000,000 32,354,000,000 33,166,000,000 29,958,000,000  
Inventory, Net $ 646,000,000 $ 661,000,000     $ 661,000,000 $ 646,000,000 593,000,000 712,000,000  
Asset Retirement Obligation             920,000,000 778,000,000 757,000,000
Mong Duong held-dfor-sale [Member]                  
Dispositions and Held-for-Sales Businesses                  
Debt, Long-Term and Short-Term, Combined Amount             526,000,000    
JORDAN | AES Jordan                  
Dispositions and Held-for-Sales Businesses                  
Equity Method Investment, Ownership Percentage     10.00%            
Dominican Republic Renewables                  
Dispositions and Held-for-Sales Businesses                  
Property, Plant and Equipment, Net             414,000,000    
Debt, Long-Term and Short-Term, Combined Amount             350,000,000    
Ventanas                  
Dispositions and Held-for-Sales Businesses                  
Inventory, Net             58,000,000    
Deferred Income Taxes and Tax Credits             56,000,000    
Asset Retirement Obligation             43,000,000    
Disposal Group, Held-for-sale, Not Discontinued Operations [Member]                  
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]                  
Income (Loss) from Individually Significant Component Disposed of or Held-for-sale, Excluding Discontinued Operations, Attributable to Parent, before Income Tax             33,000,000 50,000,000 48,000,000
Dispositions and Held-for-Sales Businesses                  
Income (Loss) from Individually Significant Component Disposed of or Held-for-Sale, Excluding Discontinued Operations, before Income Tax             76,000,000 $ 101,000,000 108,000,000
Disposal Group, Held-for-sale, Not Discontinued Operations [Member] | Mong Duong Subsidiary [Member]                  
Dispositions and Held-for-Sales Businesses                  
Disposal Group Not Discontinued Operation Ownership Interest Sold               51.00%  
Disposal Group, Held-for-sale, Not Discontinued Operations [Member] | Mong Duong Finance Holdings B.V._Related Party [Member]                  
Dispositions and Held-for-Sales Businesses                  
Disposal Group Not Discontinued Operation Ownership Interest Sold               51.00%  
Disposal Group, Held-for-sale, Not Discontinued Operations [Member] | Mong Duong held-dfor-sale [Member]                  
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]                  
Income (Loss) from Individually Significant Component Disposed of or Held-for-sale, Excluding Discontinued Operations, Attributable to Parent, before Income Tax             34,000,000 $ 40,000,000 50,000,000
Assets Carrying Amount Disclosure Nonrecurring             357,000,000    
Dispositions and Held-for-Sales Businesses                  
long term Concession receivable             963,000,000    
Income (Loss) from Individually Significant Component Disposed of or Held-for-Sale, Excluding Discontinued Operations, before Income Tax             79,000,000 92,000,000 109,000,000
Disposal Group, Held-for-sale, Not Discontinued Operations [Member] | Jordan (IPP1 & IPP4)                  
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]                  
Proceeds from Divestiture of Businesses             58,000,000    
Dispositions and Held-for-Sales Businesses                  
Disposal Group Not Discontinued Operation Ownership Interest Sold     26.00%            
Disposal Group, Held-for-sale, Not Discontinued Operations [Member] | Ventanas 1 & 2                  
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]                  
Income (Loss) from Individually Significant Component Disposed of or Held-for-sale, Excluding Discontinued Operations, Attributable to Parent, before Income Tax             3,000,000 13,000,000 (5,000,000)
Dispositions and Held-for-Sales Businesses                  
Income (Loss) from Individually Significant Component Disposed of or Held-for-Sale, Excluding Discontinued Operations, before Income Tax             3,000,000 13,000,000 (5,000,000)
Disposal Group, Held-for-sale, Not Discontinued Operations [Member] | Dominican Republic Renewables                  
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]                  
Income (Loss) from Individually Significant Component Disposed of or Held-for-sale, Excluding Discontinued Operations, Attributable to Parent, before Income Tax             (4,000,000) (3,000,000) 3,000,000
Assets Carrying Amount Disclosure Nonrecurring             $ 95,000,000    
Dispositions and Held-for-Sales Businesses                  
Disposal Group Not Discontinued Operation Ownership Interest Sold             50.00%    
Income (Loss) from Individually Significant Component Disposed of or Held-for-Sale, Excluding Discontinued Operations, before Income Tax             $ (6,000,000) (4,000,000) 4,000,000
Disposal Group, Held-for-sale, Not Discontinued Operations [Member] | AES Brasil                  
Dispositions and Held-for-Sales Businesses                  
Disposal Group Not Discontinued Operation Ownership Interest Sold 47.30%         47.30% 47.30%    
Disposal Group, Held-for-sale, Not Discontinued Operations [Member] | Ventanas                  
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]                  
Income (Loss) from Individually Significant Component Disposed of or Held-for-sale, Excluding Discontinued Operations, Attributable to Parent, before Income Tax             $ 3,000,000 13,000,000 (5,000,000)
Assets Carrying Amount Disclosure Nonrecurring             6,000,000    
Proceeds from Divestiture of Businesses             $ 5,000,000    
Dispositions and Held-for-Sales Businesses                  
Disposal Group Not Discontinued Operation Ownership Interest Sold             100.00%    
Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member]                  
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]                  
Income (Loss) from Individually Significant Component Disposed of or Held-for-sale, Excluding Discontinued Operations, Attributable to Parent, before Income Tax             $ 12,000,000 70,000,000 16,000,000
Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member] | Jordan (IPP1 & IPP4)                  
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]                  
Proceeds from Divestiture of Businesses     $ 45,000,000            
Dispositions and Held-for-Sales Businesses                  
Divestiture of Business, sales price     58,000,000       58,000,000    
Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member] | AES Brasil                  
Dispositions and Held-for-Sales Businesses                  
Divestiture of Business, sales price             586,000,000    
AES Brasil                  
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]                  
Gain (Loss) on Disposition of Business             $ 312,000,000    
Jordan (IPP1 & IPP4)                  
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]                  
Gain (Loss) on Disposition of Business     $ 10,000,000            
Dispositions and Held-for-Sales Businesses                  
Discontinued Operation, Equity Method Investment Retained after Disposal, Ownership Interest after Disposal             10.00%    
AES Brasil [Domain]                  
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]                  
Impairment of Long-Lived Assets to be Disposed of             $ 55,000,000    
AES Brasil [Domain] | Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member]                  
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]                  
Income (Loss) from Individually Significant Component Disposed of or Held-for-sale, Excluding Discontinued Operations, Attributable to Parent, before Income Tax             7,000,000 49,000,000 22,000,000
AES Jordan | Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member]                  
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]                  
Income (Loss) from Individually Significant Component Disposed of or Held-for-sale, Excluding Discontinued Operations, Attributable to Parent, before Income Tax             5,000,000 $ 21,000,000 $ (6,000,000)
Ventanas                  
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]                  
Impairment of Long-Lived Assets to be Disposed of             $ 125,000,000    
Dominican Republic Renewables                  
Dispositions and Held-for-Sales Businesses                  
Discontinued Operation, Equity Method Investment Retained after Disposal, Ownership Interest after Disposal             50.00%