v3.25.2
Fair Value (Nonrecurring Measurements) (Details)
 3 Months Ended 6 Months Ended
Mar. 31, 2025
USD ($)
Jun. 30, 2024
USD ($)
Mar. 31, 2024
USD ($)
Jun. 30, 2025
ARS ($)
USD ($)
Jun. 30, 2024
USD ($)
Jun. 30, 2025
USD ($)
Dec. 31, 2024
USD ($)
May 15, 2024
USD ($)
Dec. 31, 2023
USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]                  
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis with Unobservable Inputs $ (130,000,000) $ (175,000,000) $ (175,000,000)   $ (175,000,000) $ (131,000,000) $ (115,000,000)   $ (220,000,000)
Commodity Contract [Member]                  
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]                  
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis with Unobservable Inputs 2,000,000 (71,000,000) (79,000,000)   (71,000,000) (22,000,000) $ (21,000,000)   $ (110,000,000)
Other Contract [Member]                  
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]                  
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis with Unobservable Inputs           (25,000,000)      
Commodity Option                  
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]                  
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis with Unobservable Inputs           (2,000,000)      
Other Credit Derivatives                  
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]                  
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis with Unobservable Inputs           $ 5,000,000      
Mong Duong held-for-sale                  
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]                  
Selling Expense 5,000,000                
AES Brasil [Domain]                  
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]                  
Selling Expense         13,000,000        
Weighted Average [Member] | Commodity                  
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]                  
Derivative, Commodity prices       $ 68.56          
Underlying, Derivative       43.07          
Maximum [Member] | Commodity                  
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]                  
Derivative, Commodity prices       $ 132.30          
Underlying, Derivative       75.68          
Minimum [Member] | Commodity                  
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]                  
Derivative, Commodity prices       $ 13.45          
Underlying, Derivative       22.42          
Disposal Group, Held-for-Sale or Disposed of by Sale, Not Discontinued Operations | Estimate of Fair Value Measurement [Member] | Mong Duong held-for-sale                  
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]                  
Assets Carrying Amount Disclosure Nonrecurring 383,000,000 390,000,000 450,000,000   390,000,000        
Disposal Group, Held-for-Sale or Disposed of by Sale, Not Discontinued Operations | Estimate of Fair Value Measurement [Member] | Mong Duong held-for-sale | Level 1 [Member]                  
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]                  
Assets Carrying Amount Disclosure Nonrecurring 0 0 0   0        
Disposal Group, Held-for-Sale or Disposed of by Sale, Not Discontinued Operations | Estimate of Fair Value Measurement [Member] | Mong Duong held-for-sale | Level 2 [Member]                  
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]                  
Assets Carrying Amount Disclosure Nonrecurring 371,000,000 389,000,000 413,000,000   389,000,000        
Disposal Group, Held-for-Sale or Disposed of by Sale, Not Discontinued Operations | Estimate of Fair Value Measurement [Member] | Mong Duong held-for-sale | Level 3 [Member]                  
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]                  
Assets Carrying Amount Disclosure Nonrecurring 0 0 0   0        
Disposal Group, Held-for-Sale or Disposed of by Sale, Not Discontinued Operations | Estimate of Fair Value Measurement [Member] | AES Brasil [Domain]                  
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]                  
Assets Carrying Amount Disclosure Nonrecurring               $ 1,577,000,000  
Disposal Group, Held-for-Sale or Disposed of by Sale, Not Discontinued Operations | Estimate of Fair Value Measurement [Member] | AES Brasil [Domain] | Level 1 [Member]                  
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]                  
Assets Carrying Amount Disclosure Nonrecurring               0  
Disposal Group, Held-for-Sale or Disposed of by Sale, Not Discontinued Operations | Estimate of Fair Value Measurement [Member] | AES Brasil [Domain] | Level 2 [Member]                  
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]                  
Assets Carrying Amount Disclosure Nonrecurring               1,565,000,000  
Disposal Group, Held-for-Sale or Disposed of by Sale, Not Discontinued Operations | Estimate of Fair Value Measurement [Member] | AES Brasil [Domain] | Level 3 [Member]                  
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]                  
Assets Carrying Amount Disclosure Nonrecurring               $ 0  
Disposal Group, Held-for-Sale or Disposed of by Sale, Not Discontinued Operations | Mong Duong held-for-sale                  
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]                  
Asset impairment reversals (expense) $ 17,000,000 $ 6,000,000 $ 37,000,000            
Disposal Group, Held-for-Sale or Disposed of by Sale, Not Discontinued Operations | AES Brasil [Domain]                  
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]                  
Asset impairment reversals (expense)         $ 25,000,000