Summary of Significant Accounting Policies (Tables)

3 Months Ended

Mar. 31, 2013

Property, Plant and Equipment [Line Items]

Property, Plant and Equipment [Table Text Block]

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



	March 31, 2013		December 31, 2012		Depreciable Lives
Buildings, machinery and equipment	$	14,783	$	14,774	3 – 47 Years
Geothermal properties	1,248		1,243		13 – 59 Years
Other	155		142		3 – 47 Years
	16,186		16,159
Less: Accumulated depreciation	4,516		4,390
	11,670		11,769
Land	98		98
Construction in progress	1,284		1,138
Property, plant and equipment, net	$	13,052	$	13,005

Schedule of Components of Restricted Cash

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



	March 31, 2013						December 31, 2012
	Current		Non-Current		Total		Current		Non-Current		Total
Debt service⁽¹⁾	$	11	$	41	$	52	$	11	$	41	$	52
Rent reserve	3		—		3		—		—		—
Construction/major maintenance	30		10		40		32		14		46
Security/project/insurance	69		3		72		101		3		104
Other	29		3		32		49		2		51
Total	$	142	$	57	$	199	$	193	$	60	$	253

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(1)	At March 31, 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.

- Definition

Tabular disclosure of the useful life and salvage value of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale. Examples include land, buildings, machinery and equipment, and other types of furniture and equipment including, but not limited to, office equipment, furniture and fixtures, and computer equipment and software.

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- Definition

Tabular disclosure of the cash and cash items which are restricted as to withdrawal or usage. The provisions of any restrictions are described in a note to the financial statements. Restrictions may include legally restricted deposits held as compensating balances against short-term borrowing arrangements, contracts entered into with others, or entity statements of intention with regard to particular deposits; however, time deposits and short-term certificates of deposit are not generally included in legally restricted deposits.

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