Variable Interest Entities and Unconsolidated Investments (Tables)

12 Months Ended

Dec. 31, 2012

Variable Interest Entities and Unconsolidated Investments [Abstract]

Schedule of Condensed Financial Statements

Aggregated summarized financial data for our unconsolidated subsidiaries is set forth below (in millions):

Condensed Combined Balance Sheets

of Our Unconsolidated Subsidiaries

December 31, 2012 and 2011

	2012		2011
Assets:
Cash and cash equivalents	$	64	$	76
Current assets	30		37
Property, plant and equipment, net	648		656
Other assets	4		3
Total assets	$	746	$	772
Liabilities:
Current maturities of long-term debt	$	25	$	24
Current liabilities	36		47
Long-term debt	423		438
Long-term derivative liabilities	84		85
Total liabilities	568		594
Member’s interest	178		178
Total liabilities and member’s interest	$	746	$	772

Condensed Combined Statements of Operations

of Our Unconsolidated Subsidiaries

For the Years Ended December 31, 2012, 2011 and 2010

	2012			2011		2010
Revenues	$	247		$	277	$	228
Operating expenses	171			208		183
Income from operations	76			69		45
Interest expense, net of interest income	27			30		27
Other (income) expense, net	(2		)	2		—
Net income	$	51		$	37	$	18

Schedule of Equity Method Investments

At December 31, 2012 and 2011, our equity method investments included on our Consolidated Balance Sheets were comprised of the following (in millions):

	Ownership Interest as of December 31, 2012	2012		2011
Greenfield LP	50%	$	69	$	72
Whitby	50%	12		8
Total investments		$	81	$	80

Income (Loss) From Unconsolidated Investments in Power Plants and Distributions

Our equity interest in the net income from Greenfield LP and Whitby for the years ended December 31, 2012, 2011 and 2010, are recorded in (income) from unconsolidated investments in power plants. The following table sets forth details of our (income) from unconsolidated investments in power plants and distributions for the years indicated (in millions):

	(Income) from Unconsolidated Investments in Power Plants									Distributions
	2012			2011			2010			2012		2011		2010
Greenfield LP	$	(17	)	$	(12	)	$	(8	)	$	22	$	2	$	6
Whitby	(11		)	(9		)	(8		)	7		4		5
Total	$	(28	)	$	(21	)	$	(16	)	$	29	$	6	$	11