v2.4.0.8
Property, Plant and Equipment, Net
 12 Months Ended
Dec. 31, 2013
Property, Plant and Equipment, Net [Abstract]  
Property, Plant and Equipment, Net
Property, Plant and Equipment, Net
As of December 31, 2013 and 2012, the components of property, plant and equipment are stated at cost less accumulated depreciation as follows (in millions):
 
2013
 
2012
 
Depreciable Lives
Buildings, machinery and equipment(1)
$
15,838

 
$
14,774

 
3 – 47 Years
Geothermal properties
1,265

 
1,243

 
13 – 59 Years
Other
164

 
142

 
3 – 47 Years
 
17,267

 
16,159

 
 
Less: Accumulated depreciation
4,897

 
4,390

 
 
 
12,370

 
11,769

 
 
Land
103

 
98

 
 
Construction in progress(1)
522

 
1,138

 
 
Property, plant and equipment, net
$
12,995

 
$
13,005

 
 

___________
(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.
We have various debt instruments that are collateralized by our property, plant and equipment. See Note 6 for a discussion of such instruments.
Buildings, Machinery and Equipment
This component primarily includes power plants and related equipment. Included in buildings, machinery and equipment are assets under capital leases. See Note 6 for further information regarding these assets under capital leases.
Geothermal Properties
This component primarily includes power plants and related equipment associated with our Geysers Assets.
Other
This component primarily includes software and emission reduction credits that are power plant specific and not available to be sold.
Capitalized Interest
The total amount of interest capitalized was $38 million, $38 million and $24 million for the years ended December 31, 2013, 2012 and 2011, respectively.