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Debt (Non-Recourse Debt Carrying Amounts and Terms) (Details) - USD ($)
Dec. 31, 2018
Dec. 31, 2017
Feb. 28, 2017
Debt Instrument [Line Items]      
Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net $ (368,000,000) $ (394,000,000)  
Non-Recourse Debt 15,645,000,000 15,340,000,000  
Non-recourse Debt Current Maturities (1,659,000,000) (2,164,000,000)  
Non-recourse debt - noncurrent, balance at variable interest entities 13,986,000,000 13,176,000,000  
Derivative, notional amount $ 3,900,000,000    
Interest rate swap, fixed minimum interest rate 2.24%    
Interest rate swap, fixed maximum interest rate 8.00%    
Variable Rate Debt | Bank loans      
Debt Instrument [Line Items]      
Weighted Average Interest Rate 4.46%    
Variable Rate Debt | Notes and bonds      
Debt Instrument [Line Items]      
Weighted Average Interest Rate 3.89%    
Variable Rate Debt | Debt to (or guaranteed by) multilateral, export credit agencies or development banks      
Debt Instrument [Line Items]      
Weighted Average Interest Rate [1] 3.56%    
Fixed Rate Debt | Bank loans      
Debt Instrument [Line Items]      
Weighted Average Interest Rate 4.62%    
Fixed Rate Debt | Notes and bonds      
Debt Instrument [Line Items]      
Weighted Average Interest Rate 5.85%    
Fixed Rate Debt | Debt to (or guaranteed by) multilateral, export credit agencies or development banks      
Debt Instrument [Line Items]      
Weighted Average Interest Rate [1] 5.45%    
Fixed Rate Debt | Other      
Debt Instrument [Line Items]      
Weighted Average Interest Rate 5.87%    
Nonrecourse Debt [Member]      
Debt Instrument [Line Items]      
Debt Instrument, Face Amount $ 1,351,000,000    
Other | Fixed Rate Debt      
Debt Instrument [Line Items]      
Non-Recourse Debt 24,000,000 26,000,000  
Debt to (or guaranteed by) multilateral, export credit agencies or development banks | Variable Rate Debt      
Debt Instrument [Line Items]      
Non-Recourse Debt [1] 3,292,000,000 3,668,000,000  
Debt to (or guaranteed by) multilateral, export credit agencies or development banks | Fixed Rate Debt      
Debt Instrument [Line Items]      
Non-Recourse Debt [1] 246,000,000 271,000,000  
Notes and bonds | Variable Rate Debt      
Debt Instrument [Line Items]      
Non-Recourse Debt 821,000,000 900,000,000  
Notes and bonds | Fixed Rate Debt      
Debt Instrument [Line Items]      
Non-Recourse Debt 7,346,000,000 7,388,000,000  
Bank loans | Variable Rate Debt      
Debt Instrument [Line Items]      
Non-Recourse Debt 2,600,000,000 2,488,000,000  
Bank loans | Fixed Rate Debt      
Debt Instrument [Line Items]      
Non-Recourse Debt 1,684,000,000 $ 993,000,000  
AES Argentina [Member] | Nonrecourse Debt [Member]      
Debt Instrument [Line Items]      
Debt Instrument, Face Amount 0   $ 75,000,000
AES Argentina [Member] | Unsecured Debt [Member]      
Debt Instrument [Line Items]      
Debt Instrument, Face Amount     $ 300,000,000
AES Southland [Domain] | Nonrecourse Debt [Member]      
Debt Instrument [Line Items]      
Debt Instrument, Face Amount $ 104,000,000    
[1] Multilateral loans include loans funded and guaranteed by bilaterals, multilaterals, development banks and other similar institutions.