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Investments In and Advances To Affiliates - Effective Equity Ownership Interest and Carrying Values (Details) - USD ($)
$ in Millions
Dec. 31, 2015
Dec. 31, 2014
Oct. 13, 2014
Jul. 02, 2014
Dec. 31, 2013
Investments in and Advances to Affiliates [Line Items]          
Investments in and advances to affiliates $ 610 $ 537     $ 1,010
Gener Subsidiary [Member]          
Investments in and Advances to Affiliates [Line Items]          
Noncontrolling Interest, Ownership Percentage by Parent 67.00% 71.00%      
Silver Ridge Power          
Investments in and Advances to Affiliates [Line Items]          
Equity Method Investment, Ownership Percentage       50.00%  
Solar Power PR, LLC          
Investments in and Advances to Affiliates [Line Items]          
Investments in and advances to affiliates $ 0 $ 2      
Equity Method Investment, Ownership Percentage 0.00% 50.00%      
Barry          
Investments in and Advances to Affiliates [Line Items]          
Investments in and advances to affiliates [1] $ 0 $ 0      
Equity Method Investment, Ownership Percentage [1] 100.00% 100.00%      
Elsta          
Investments in and Advances to Affiliates [Line Items]          
Investments in and advances to affiliates [1] $ 53 $ 54      
Equity Method Investment, Ownership Percentage [1] 50.00% 50.00%      
Entek          
Investments in and Advances to Affiliates [Line Items]          
Equity Method Investment, Ownership Percentage     49.62%    
Guacolda Affiliate [Member]          
Investments in and Advances to Affiliates [Line Items]          
Investments in and advances to affiliates [2] $ 344 $ 285      
Equity Method Investment, Ownership Percentage [2] 33.00% 35.00%      
OPGC          
Investments in and Advances to Affiliates [Line Items]          
Investments in and advances to affiliates [3] $ 195 $ 194      
Equity Method Investment, Ownership Percentage [3] 49.00% 49.00%      
Other Affiliates [Member]          
Investments in and Advances to Affiliates [Line Items]          
Investments in and advances to affiliates $ 1 $ 2      
Main street power [Member]          
Investments in and Advances to Affiliates [Line Items]          
Investments in and advances to affiliates [1] $ 17 $ 0      
Equity Method Investment, Ownership Percentage [1] 94.00% 0.00%      
Gener Subsidiary [Member] | Guacolda Affiliate [Member]          
Investments in and Advances to Affiliates [Line Items]          
Equity Method Investment, Ownership Percentage 50.00%        
[1] (1) Represent VIEs in which the Company holds a variable interest but is not the primary beneficiary.
[2] (2) The Company's ownership in Guacolda is held through AES Gener, a 67%-owned consolidated subsidiary. AES Gener owns 50% of Guacolda, resulting in an AES effective ownership in Guacolda of 33%.
[3] (3) OPGC has one coal-fired expansion project under development. The project started construction in April 2014 and is currently expected to begin operations in 2018.