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Condensed Consolidated Statements of Stockholders' Equity - USD ($)
$ in Millions
Total
NRG Yield, Inc.
Common Stock
Additional Paid-In Capital
Additional Paid-In Capital
NRG Yield, Inc.
Accumulated Deficit
Treasury Stock
Accumulated Other Comprehensive Loss
Noncontrolling Interest
Noncontrolling Interest
NRG Yield, Inc.
Balance at Dec. 31, 2017 $ 1,968   $ 4 $ 8,376   $ (6,268) $ (2,386) $ (72) $ 2,314  
Increase (Decrease) in Stockholders' Equity [Roll Forward]                    
Net income 249         279     (30)  
Other comprehensive loss 11             11    
Sale of assets to NRG Yield, Inc.   $ 12     $ 8         $ 4
ESPP share purchases 3     (2)     5      
Share repurchases (93)           (93)      
Equity-based compensation (10)     (10)            
Issuance of common stock 7     7            
Common stock dividends (10)         (10)        
Distributions to noncontrolling interest and dividends paid (19) $ (30)             (19) $ (30)
Contributions from noncontrolling interests 153               153  
Adoption of new accounting standards 17         17        
Balance at Mar. 31, 2018 2,258   4 8,379   (5,982) (2,474) (61) $ 2,392  
Balance at Dec. 31, 2018 (1,234)   4 8,510   (6,022) (3,632) (94)    
Increase (Decrease) in Stockholders' Equity [Roll Forward]                    
Net income 482         482        
Other comprehensive loss (2)             (2)    
Share repurchases (749)     (10)     (739)      
Equity-based compensation (32)     (32)          
Issuance of common stock 5     5            
Common stock dividends (8)         (8)        
Balance at Mar. 31, 2019 $ (1,538)   $ 4 $ 8,473   $ (5,548) $ (4,371) $ (96)