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Risks and Uncertainties (Details) - USD ($)
$ in Millions
Sep. 30, 2020
Dec. 31, 2019
Unusual Risk or Uncertainty [Line Items]    
Goodwill, Reporting Unit at Risk, Percentage 10.00% 10.00%
Goodwill $ 1,059 $ 1,059
Debt Default Amount 296  
Investments in and advances to affiliates 787 $ 966
PUERTO RICO | Covenant Violation [Member]    
Unusual Risk or Uncertainty [Line Items]    
Debt Default Amount 258  
AES llumina [Member] | Covenant Violation [Member]    
Unusual Risk or Uncertainty [Line Items]    
Debt Default Amount $ 31  
Gener Subsidiary [Member]    
Unusual Risk or Uncertainty [Line Items]    
Reporting Unit, Percentage of Fair Value in Excess of Carrying Amount 13.00% 3.00%
Goodwill $ 868