v2.4.0.8
Property, Plant and Equipment, Net (Details) (USD $)
In Millions, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Property, Plant and Equipment [Line Items]      
Buildings, machinery and equipment $ 15,838 $ 14,774  
Geothermal properties 1,265 1,243  
Other 164 142  
Property, Plant and Equipment, Gross 17,267 16,159  
Less: Accumulated depreciation 4,897 4,390  
Property, Plant and Equipment, Gross, Less Accumulated Depreciation 12,370 11,769  
Land 103 98  
Construction in progress 522 [1] 1,138 [1]  
Property, plant and equipment, net 12,995 13,005  
Interest Costs, Capitalized During Period $ 38 $ 38 $ 24
Building, Machinery and Equipment, Gross [Member] | Minimum [Member]
      
Property, Plant and Equipment [Line Items]      
Property, Plant and Equipment, Estimated Useful Lives P3Y    
Building, Machinery and Equipment, Gross [Member] | Maximum [Member]
      
Property, Plant and Equipment [Line Items]      
Property, Plant and Equipment, Estimated Useful Lives P47Y    
Geothermal Properties, Gross [Member] | Minimum [Member]
      
Property, Plant and Equipment [Line Items]      
Property, Plant and Equipment, Estimated Useful Lives P13Y    
Geothermal Properties, Gross [Member] | Maximum [Member]
      
Property, Plant and Equipment [Line Items]      
Property, Plant and Equipment, Estimated Useful Lives P59Y    
Property, Plant and Equipment, Other Types [Member] | Minimum [Member]
      
Property, Plant and Equipment [Line Items]      
Property, Plant and Equipment, Estimated Useful Lives P3Y    
Property, Plant and Equipment, Other Types [Member] | Maximum [Member]
      
Property, Plant and Equipment [Line Items]      
Property, Plant and Equipment, Estimated Useful Lives P47Y    
[1] The change from December 31, 2012 to December 31, 2013 is primarily attributed to our Russell City and Los Esteros power plants commencing commercial operations during 2013