Basis of Presentation and Summary of Significant Accounting Policies (Tables)

3 Months Ended

Mar. 31, 2018

Schedule of components of restricted cash

The table below represents the components of our restricted cash as of March 31, 2018 and December 31, 2017 (in millions):



	March 31, 2018						December 31, 2017
	Current		Non-Current		Total		Current		Non-Current		Total
Debt service	$	12	$	7	$	19	$	11	$	8	$	19
Construction/major maintenance	25		18		43		28		16		44
Security/project/insurance	88		—		88		92		—		92
Other	3		3		6		3		1		4
Total	$	128	$	28	$	156	$	134	$	25	$	159

Schedule of property, plant and equipment

Property, Plant and Equipment, Net — At March 31, 2018 and December 31, 2017, the components of property, plant and equipment are stated at cost less accumulated depreciation as follows (in millions):



	March 31, 2018		December 31, 2017		Depreciable Lives
Buildings, machinery and equipment	$	16,512	$	16,506	3	–	46	Years
Geothermal properties	1,500		1,494		13	–	58	Years
Other	252		236		3	–	46	Years
	18,264		18,236
Less: Accumulated depreciation	6,545		6,383
	11,719		11,853
Land	117		117
Construction in progress	787		754
Property, plant and equipment, net	$	12,623	$	12,724