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General and Summary of Significant Accounting Policies Change in Accounting Estimate (Details) - USD ($)
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Sep. 30, 2024
Jun. 30, 2024
Dec. 31, 2022
Change in Accounting Estimate [Line Items]          
Accounts receivable, net of allowance of $52 and $15, respectively $ 1,646,000,000 $ 1,420,000,000 $ 1,868,000,000 $ 1,507,000,000  
Other Assets, Current (1,533,000,000) (1,387,000,000) (1,460,000,000) (1,458,000,000)  
Other Assets, Noncurrent (2,917,000,000) (3,259,000,000) (2,593,000,000) (2,845,000,000)  
Retained Earnings (Accumulated Deficit) 293,000,000 (1,386,000,000) (174,000,000) (678,000,000)  
Stockholders' Equity Attributable to Noncontrolling Interest 4,060,000,000 3,497,000,000 4,447,000,000 4,031,000,000  
Accounts Receivable, Allowance for Credit Loss, Current 52,000,000 15,000,000 $ 32 $ 22  
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)      
Accounts and Financing Receivable, Allowance for Credit Loss 96,000,000 64,000,000     $ 83,000,000
Mong Duong Subsidiary [Member]          
Change in Accounting Estimate [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      
Other Entity [Member]          
Change in Accounting Estimate [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)      
AES Argentina [Member]          
Change in Accounting Estimate [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)      
AES Southland [Domain]          
Change in Accounting Estimate [Line Items]          
Accounts Receivable, Allowance for Credit Loss, Current   0      
Accounts Receivable, Allowance for Credit Loss, Period Increase (Decrease)   0      
Accounts Receivable, Allowance for Credit Loss, Writeoff   (20,000,000)      
Accounts Receivable, Allowance for Credit Loss, Recovery   0      
Financing Receivable, Allowance for Credit Loss, Foreign Currency Translation   $ 0      
Accounts Receivable, Allowance for Credit Loss         $ 20,000,000