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Investments In and Advances To Affiliates - Effective Equity Ownership Interest and Carrying Values (Details) - USD ($)
$ in Millions
Dec. 31, 2021
Sep. 30, 2021
Jun. 30, 2021
Mar. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Investments in and Advances to Affiliates [Line Items]            
Investments in and advances to affiliates $ 1,080       $ 835 $ 966
Other long-term liabilities 3,358       3,241  
sPower [Member]            
Investments in and Advances to Affiliates [Line Items]            
Investments in and advances to affiliates $ 492       $ 551  
Equity Method Investment, Ownership Percentage 50.00%       50.00%  
Equity Method Investment, Ownership Acquired 25.00%          
Uplight            
Investments in and Advances to Affiliates [Line Items]            
Investments in and advances to affiliates $ 103       $ 85  
Equity Method Investment, Ownership Percentage 29.40% 29.60% 32.30%   32.00%  
Eolica Mesa La Paz [Member]            
Investments in and Advances to Affiliates [Line Items]            
Investments in and advances to affiliates [1] $ 48       $ 60  
Equity Method Investment, Ownership Percentage [1] 50.00%       50.00%  
Energía Natural Dominicana Enadom            
Investments in and Advances to Affiliates [Line Items]            
Investments in and advances to affiliates $ 53       $ 49  
Equity Method Investment, Ownership Percentage 43.00%       43.00%  
Guacolda Affiliate [Member]            
Investments in and Advances to Affiliates [Line Items]            
Equity Method Investment, Ownership Percentage     50.00%      
Barry            
Investments in and Advances to Affiliates [Line Items]            
Investments in and advances to affiliates [2] $ 0       $ 0  
Equity Method Investment, Ownership Percentage [2] 100.00%       100.00%  
Grupo Energia Gas Panama            
Investments in and Advances to Affiliates [Line Items]            
Investments in and advances to affiliates $ 41       $ 0  
Equity Method Investment, Ownership Percentage 49.00%       0.00%  
Colon [Domain]            
Investments in and Advances to Affiliates [Line Items]            
Due from Affiliates         $ 67  
Fluence [Member]            
Investments in and Advances to Affiliates [Line Items]            
Investments in and advances to affiliates $ 304       $ 0  
Equity Method Investment, Ownership Percentage 34.00%   43.20% 50.00% 50.00%  
Other long-term liabilities         $ 12  
Other Affiliates [Member]            
Investments in and Advances to Affiliates [Line Items]            
Investments in and advances to affiliates [3] $ 39       $ 90  
[1] The Company's ownership in Energía Natural Dominicana Enadom is held through Andres, an 85%-owned consolidated subsidiary. Andres owns 50% of Energía Natural Dominicana Enadom, resulting in an AES effective ownership of 43%.
[2] Represents a VIE in which the Company holds a variable interest, but is not the primary beneficiary.
[3] Includes Bosforo and Tucano equity method investments, and others. During 2020, a $67 million loan facility was granted from Colon to Gas Natural Atlántico II that was eliminated due to consolidation in 2021.