Summary of Significant Accounting Policies (Tables)

6 Months Ended

Jun. 30, 2013

Summary of Significant Accounting Policies [Abstract]

Schedule of Components of Restricted Cash

table below represents the components of our restricted cash as of June 30, 2013 and December 31, 2012 (in millions):

	June 30, 2013						December 31, 2012
	Current		Non-Current		Total		Current		Non-Current		Total
Debt service(1)	$	14	$	42	$	56	$	11	$	41	$	52
Rent reserve	7		—		7		—		—		—
Construction/major maintenance	26		8		34		32		14		46
Security/project/insurance	73		6		79		101		3		104
Other	20		2		22		49		2		51
Total	$	140	$	58	$	198	$	193	$	60	$	253

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(1) At June 30, 2013 and December 31, 2012, amounts restricted for debt service included approximately $24 million and $25 million, respectively, of repurchase agreements with a financial institution containing maturity dates greater than one year.

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Schedule of Property, Plant and Equipment

perty, Plant and Equipment, Net — At June 30, 2013 and December 31, 2012, the components of property, plant and equipment are stated at cost less accumulated depreciation as follows (in millions):

	June 30, 2013		December 31, 2012		Depreciable Lives
Buildings, machinery and equipment	$	14,815	$	14,774	3 – 47 Years
Geothermal properties	1,248		1,243		13 – 59 Years
Other	156		142		3 – 47 Years
	16,219		16,159
Less: Accumulated depreciation	4,641		4,390
	11,578		11,769
Land	103		98
Construction in progress	1,376		1,138
Property, plant and equipment, net	$	13,057	$	13,005

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