Property, Plant and Equipment, Net (Tables)

12 Months Ended

Dec. 31, 2012

Property, Plant and Equipment, Net [Abstract]

Components of Property, Plant and Equipment

As of December 31, 2012 and 2011, the components of property, plant and equipment, are stated at cost less accumulated depreciation as follows (in millions):

	2012		2011		Depreciable Lives
Buildings, machinery and equipment	$	14,774	$	15,074	3 – 47 Years
Geothermal properties	1,243		1,163		13 – 59 Years
Other	142		156		3 – 47 Years
	16,159		16,393
Less: Accumulated depreciation	4,390		4,158
	11,769		12,235
Land	98		91
Construction in progress	1,138		693
Property, plant and equipment, net	$	13,005	$	13,019