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General and Summary of Significant Accounting Policies New Accounting Pronouncements Adopted (Details) - USD ($)
 3 Months Ended 6 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2024
Jun. 30, 2024
Jun. 30, 2024
Sep. 30, 2024
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
New Accounting Pronouncements or Change in Accounting Principle [Line Items]                
Financing Receivable, after Allowance for Credit Loss         $ 87,000,000 $ 193,000,000    
Other assets $ 2,593,000,000 $ 2,845,000,000 $ 2,845,000,000 $ 2,593,000,000 2,917,000,000 3,259,000,000    
Operating Lease, Right-of-Use Asset         372,000,000 380,000,000    
Revenues 3,289,000,000 2,942,000,000 6,027,000,000 9,316,000,000 12,278,000,000 12,668,000,000 $ 12,617,000,000  
Cost of Goods and Services Sold (2,567,000,000) (2,389,000,000) (4,855,000,000) (7,422,000,000) (9,964,000,000) (10,164,000,000) (10,069,000,000)  
Gross Profit 722,000,000 553,000,000 1,172,000,000 1,894,000,000 2,314,000,000 2,504,000,000 2,548,000,000  
Interest income 119,000,000 88,000,000 193,000,000 312,000,000 381,000,000 551,000,000 389,000,000  
Other Assets, Current 1,460,000,000 1,458,000,000 1,458,000,000 1,460,000,000 1,533,000,000 1,387,000,000    
Assets 50,265,000,000 47,915,000,000 47,915,000,000 50,265,000,000 47,406,000,000 44,799,000,000 38,363,000,000  
Retained Earnings (Accumulated Deficit) (174,000,000) (678,000,000) (678,000,000) (174,000,000) 293,000,000 (1,386,000,000)    
Cash and Cash Equivalents, at Carrying Value 1,919,000,000 1,773,000,000 1,773,000,000 1,919,000,000 1,524,000,000 1,426,000,000    
Restricted Cash and Cash Equivalents, Current 563,000,000 299,000,000 299,000,000 563,000,000 437,000,000 370,000,000    
Other Comprehensive Income (Loss), Effect of Change in Accounting Principle, Net of Taxes (225,000,000) (20,000,000) 138,000,000 (87,000,000) 919,000,000 69,000,000 748,000,000  
Debt service reserves and other deposits 77,000,000 76,000,000 76,000,000 77,000,000 78,000,000 194,000,000    
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents 2,559,000,000 2,148,000,000 2,148,000,000 2,559,000,000 2,039,000,000 1,990,000,000 2,087,000,000 $ 1,484,000,000
Accumulated Other Comprehensive Income (Loss), Net of Tax (1,600,000,000) (1,416,000,000) (1,416,000,000) (1,600,000,000) (766,000,000) (1,514,000,000) (1,640,000,000) $ (2,220,000,000)
Stockholders' Equity Attributable to Noncontrolling Interest 4,447,000,000 4,031,000,000 4,031,000,000 4,447,000,000 4,060,000,000 3,497,000,000    
Liabilities and Equity 50,265,000,000 47,915,000,000 47,915,000,000 50,265,000,000 47,406,000,000 44,799,000,000    
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest 334,000,000 115,000,000 392,000,000 726,000,000 894,000,000 104,000,000 (169,000,000)  
Income (Loss) from Continuing Operations, net of Tax 222,000,000     653,000,000 809,000,000 (189,000,000) (505,000,000)  
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest 215,000,000 153,000,000 431,000,000 646,000,000 802,000,000 (182,000,000) (505,000,000)  
NET INCOME (LOSS) ATTRIBUTABLE TO THE AES CORPORATION 504,000,000 276,000,000 708,000,000 1,212,000,000 1,679,000,000 249,000,000 (546,000,000)  
Accrued and other liabilities 1,182,000,000 1,043,000,000 1,043,000,000 1,182,000,000 1,246,000,000 1,334,000,000    
Other long-term liabilities 2,501,000,000 2,452,000,000 2,452,000,000 2,501,000,000 2,881,000,000 3,114,000,000    
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value         751,000,000 792,000,000    
Financing Receivable, before Allowance for Credit Loss         102,000,000 193,000,000    
Accounts and Financing Receivable, Allowance for Credit Loss         96,000,000 64,000,000 83,000,000  
Financing Receivable, Allowance for Credit Loss         15,000,000 0    
Accounts Receivable, Allowance for Credit Loss, Current 32 22 22 32 52,000,000 15,000,000    
Accounts Receivable, Allowance for Credit Loss, Period Increase (Decrease)         58,000,000 40,000,000    
Accounts Receivable, Allowance for Credit Loss, Writeoff         (13,000,000) (35,000,000)    
Accounts Receivable, Allowance for Credit Loss, Recovery         (1,000,000) (1,000,000)    
Financing Receivable, Allowance for Credit Loss, Foreign Currency Translation         (5,000,000) (23,000,000)    
Purchases under supplier financing arrangements     (708,000,000) (1,211,000,000) 1,786,000,000 (1,858,000,000) (1,042,000,000)  
Repayments of obligations under supplier financing arrangements     1,055,000,000 1,412,000,000 1,794,000,000 1,491,000,000 432,000,000  
Accounts payable 1,965,000,000 1,869,000,000 1,869,000,000 1,965,000,000 1,654,000,000 2,199,000,000    
Supplier financing arrangements $ 698,000,000 $ 553,000,000 $ 553,000,000 $ 698,000,000 917,000,000 974,000,000 662,000,000  
Property, Plant and Equipment [Member]                
New Accounting Pronouncements or Change in Accounting Principle [Line Items]                
Operating Lease, Right-of-Use Asset         1,085,000,000 1,227,000,000    
Accumulated Amortization on PP&E [Member]                
New Accounting Pronouncements or Change in Accounting Principle [Line Items]                
Operating Lease, Right-of-Use Asset         218,000,000 182,000,000    
Mong Duong Subsidiary [Member]                
New Accounting Pronouncements or Change in Accounting Principle [Line Items]                
Accounts Receivable, Allowance for Credit Loss, Current         23,000,000 25,000,000 28,000,000  
Accounts Receivable, Allowance for Credit Loss, Period Increase (Decrease)         0 0    
Accounts Receivable, Allowance for Credit Loss, Writeoff         0 0    
Accounts Receivable, Allowance for Credit Loss, Recovery         (2,000,000) (3,000,000)    
Financing Receivable, Allowance for Credit Loss, Foreign Currency Translation         0 0    
AES Argentina [Member]                
New Accounting Pronouncements or Change in Accounting Principle [Line Items]                
Accounts Receivable, Allowance for Credit Loss, Current         5,000,000 7,000,000 30,000,000  
Accounts Receivable, Allowance for Credit Loss, Period Increase (Decrease)         0 0    
Accounts Receivable, Allowance for Credit Loss, Writeoff         0 0    
Accounts Receivable, Allowance for Credit Loss, Recovery         0 0    
Financing Receivable, Allowance for Credit Loss, Foreign Currency Translation         (2,000,000) (23,000,000)    
Other Entity [Member]                
New Accounting Pronouncements or Change in Accounting Principle [Line Items]                
Accounts Receivable, Allowance for Credit Loss, Current         16,000,000 17,000,000 2,000,000  
Accounts Receivable, Allowance for Credit Loss, Period Increase (Decrease)         15,000,000 17,000,000    
Accounts Receivable, Allowance for Credit Loss, Writeoff         (6,000,000) 0    
Accounts Receivable, Allowance for Credit Loss, Recovery         0 0    
Financing Receivable, Allowance for Credit Loss, Foreign Currency Translation         (3,000,000) (2,000,000)    
ARGENTINA                
New Accounting Pronouncements or Change in Accounting Principle [Line Items]                
Revenues         $ 318,000,000 $ 407,000,000 $ 501,000,000