v3.6.0.2
Property, Plant and Equipment, Net (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Property, Plant and Equipment [Line Items]      
Buildings, machinery and equipment $ 16,468 $ 16,294  
Geothermal properties 1,377 1,319  
Other 259 208  
Property, Plant and Equipment, Gross 18,104 17,821  
Less: Accumulated depreciation 5,865 5,377  
Property, Plant and Equipment, Gross, Less Accumulated Depreciation 12,239 12,444  
Land 116 120  
Construction in progress 658 448  
Property, plant and equipment, net 13,013 13,012  
Depreciation 628 595 $ 591
Interest Costs, Capitalized During Period $ 21 $ 15 $ 19
Building, Machinery and Equipment, Gross [Member] | Minimum [Member]      
Property, Plant and Equipment [Line Items]      
Property, Plant and Equipment, Estimated Useful Lives 3 years    
Building, Machinery and Equipment, Gross [Member] | Maximum [Member]      
Property, Plant and Equipment [Line Items]      
Property, Plant and Equipment, Estimated Useful Lives 46 years    
Geothermal Properties, Gross [Member] | Minimum [Member]      
Property, Plant and Equipment [Line Items]      
Property, Plant and Equipment, Estimated Useful Lives 13 years    
Geothermal Properties, Gross [Member] | Maximum [Member]      
Property, Plant and Equipment [Line Items]      
Property, Plant and Equipment, Estimated Useful Lives 58 years    
Property, Plant and Equipment, Other Types [Member] | Minimum [Member]      
Property, Plant and Equipment [Line Items]      
Property, Plant and Equipment, Estimated Useful Lives 3 years    
Property, Plant and Equipment, Other Types [Member] | Maximum [Member]      
Property, Plant and Equipment [Line Items]      
Property, Plant and Equipment, Estimated Useful Lives 46 years