XML 130 R95.htm IDEA: XBRL DOCUMENT v2.4.0.6
Capital Structure (Details 3) (USD $)
12 Months Ended
Dec. 31, 2012
day
Aug. 11, 2005
Capital Structure    
Convertible perpetual preferred stock, terms of conversion Holders tendering the 3.625% Preferred Stock for conversion shall be entitled to receive, for each share of 3.625% Preferred Stock converted, $1,000 in cash and a number of shares of NRG common stock equal in value to the product of (a) the greater of (i) the difference between the average closing share price of NRG common stock on each of the twenty consecutive scheduled trading days starting on the date thirty exchange business days immediately prior to the conversion date, or the Market Price, and $29.54 and (ii) zero, times (b) 50.77. The number of shares of NRG common stock to be delivered under the conversion feature is limited to 16,000,000 shares. If upon conversion, the Market Price is less than $19.69, then the Holder will deliver to NRG cash or a number of shares of NRG common stock equal in value to the product of (i) $19.69 minus the Market Price, times (ii) 50.77.  
Preferred Stock | 4.00% Preferred Stock
   
Capital Structure    
Liquidation preference (in dollars per share) $ 1,000  
Convertible perpetual preferred stock, initial conversion price $ 20  
Redemption price as a percentage of liquidation preference (as a percent) 100.00%  
Preferred Stock | 3.625% Preferred Stock
   
Capital Structure    
Liquidation preference (in dollars per share) $ 1,000  
Redemption price as a percentage of liquidation preference (as a percent) 100.00%  
Preferred Stock, Shares Issued   250,000
Dividends on preferred stock per share per year $ 36.25  
Preferred stock, conversion period (in days) 90