The tables below show our financial data for our segments for the periods indicated (in millions).



	Three Months Ended June 30, 2013
	West		Texas			North			Southeast			Consolidation and Elimination			Total
Revenues from external customers	$	479	$	571		$	348		$	174		$	—		$	1,572
Intersegment revenues	—		(25		)	8			71			(54		)	—
Total operating revenues	$	479	$	546		$	356		$	245		$	(54	)	$	1,572
Commodity Margin	$	198	$	133		$	159		$	43		$	—		$	533
Add: Unrealized mark-to-market commodity activity, net and other⁽¹⁾	19		34			(12		)	7			(9		)	39
Less:
Plant operating expense	88		96			46			35			(8		)	257
Depreciation and amortization expense	52		44			32			18			(1		)	145
Sales, general and other administrative expense	3		21			6			7			(1		)	36
Other operating expenses	11		1			7			(1		)	2			20
(Income) from unconsolidated investments in power plants	—		—			(8		)	—			—			(8		)
Income (loss) from operations	63		5			64			(9		)	(1		)	122
Interest expense, net of interest income															169
Debt extinguishment costs and other (income) expense, net															71
Loss before income taxes															$	(118	)



	Three Months Ended June 30, 2012
	West			Texas			North			Southeast			Consolidation and Elimination			Total
Revenues from external customers	$	258		$	188		$	269		$	164		$	—		$	879
Intersegment revenues	1			41			2			(6		)	(38		)	—
Total operating revenues	$	259		$	229		$	271		$	158		$	(38	)	$	879
Commodity Margin⁽²⁾⁽³⁾	$	210		$	145		$	181		$	73		$	—		$	609
Add: Unrealized mark-to-market commodity activity, net and other⁽¹⁾	(76		)	(217		)	(3		)	(42		)	(6		)	(344		)
Less:
Plant operating expense	112			72			58			36			(7		)	271
Depreciation and amortization expense	49			34			34			22			(1		)	138
Sales, general and other administrative expense	6			13			8			7			1			35
Other operating expenses	9			1			6			2			1			19
(Income) from unconsolidated investments in power plants	—			—			(5		)	—			—			(5		)
Income (loss) from operations	(42		)	(192		)	77			(36		)	—			(193		)
Interest expense, net of interest income																182
Other (income) expense, net																6
Loss before income taxes																$	(381	)



	Six Months Ended June 30, 2013
	West			Texas			North			Southeast			Consolidation and Elimination			Total
Revenues from external customers	$	862		$	978		$	654		$	319		$	—		$	2,813
Intersegment revenues	1			(18		)	15			104			(102		)	—
Total operating revenues	$	863		$	960		$	669		$	423		$	(102	)	$	2,813
Commodity Margin	$	400		$	209		$	301		$	84		$	—		$	994
Add: Unrealized mark-to-market commodity activity, net and other⁽⁴⁾	(18		)	23			(5		)	14			(16		)	(2		)
Less:
Plant operating expense	181			164			90			65			(16		)	484
Depreciation and amortization expense	103			87			65			37			(1		)	291
Sales, general and other administrative expense	7			38			12			12			—			69
Other operating expenses	20			2			14			1			1			38
(Income) from unconsolidated investments in power plants	—			—			(16		)	—			—			(16		)
Income (loss) from operations	71			(59		)	131			(17		)	—			126
Interest expense, net of interest income																343
Debt extinguishment costs and other (income) expense, net																76
Loss before income taxes																$	(293	)



	Six Months Ended June 30, 2012
	West			Texas			North			Southeast			Consolidation and Elimination			Total
Revenues from external customers	$	674		$	544		$	567		$	330		$	—		$	2,115
Intersegment revenues	5			61			5			16			(87		)	—
Total operating revenues	$	679		$	605		$	572		$	346		$	(87	)	$	2,115
Commodity Margin⁽²⁾⁽³⁾	$	418		$	254		$	325		$	129		$	—		$	1,126
Add: Unrealized mark-to-market commodity activity, net and other⁽⁴⁾	(40		)	(183		)	9			(32		)	(14		)	(260		)
Less:
Plant operating expense	193			140			103			69			(13		)	492
Depreciation and amortization expense	99			69			67			45			(2		)	278
Sales, general and other administrative expense	14			24			14			15			1			68
Other operating expenses	20			3			15			3			(1		)	40
(Income) from unconsolidated investments in power plants	—			—			(14		)	—			—			(14		)
Income (loss) from operations	52			(165		)	149			(35		)	1			2
Interest expense, net of interest income																364
Loss on interest rate derivatives																14
Debt extinguishment costs and other (income) expense, net																20
Loss before income taxes																$	(396	)

_________


(1)	Includes $(11) million and $(1) million of lease levelization and $3 million and $3 million of amortization expense for the three months ended June 30, 2013 and 2012, respectively.


(2)	Our North segment includes Commodity Margin of $24 million and $32 million for the three and six months ended June 30, 2012 related to Riverside Energy Center, LLC, which was sold in December 2012.


(3)	Our Southeast segment includes Commodity Margin of $13 million and $24 million for the three and six months ended June 30, 2012 related to Broad River, which was sold in December 2012.


(4)	Includes $(27) million and $(9) million of lease levelization and $7 million and $7 million of amortization expense for the six months ended June 30, 2013 and 2012, respectively.