SEGMENT OF BUSINESS INFORMATION (Tables)

12 Months Ended

Dec. 31, 2011

SEGMENT OF BUSINESS INFORMATION

Schedule of revenue, income and assets by segments

	Electric Operations			Gas Distribution		Retail Gas Marketing		Energy Marketing		All Other			Adjustments/ Eliminations			Consolidated Total
2011
External Revenue	$	2,424		$	840	$	479	$	657	$	41		$	(32	)	$	4,409
Intersegment Revenue	8			1		—		188		406			(603		)	—
Operating Income	616			132		n/a		n/a		18			47			813
Interest Expense	23			24		1		—		3			233			284
Depreciation and Amortization	271			65		3		—		25			(18		)	346
Income Tax Expense	5			30		16		3		10			104			168
Income Available to Common Shareholders	n/a			n/a		24		4		(6		)	365			387
Segment Assets	8,222			2,179		185		114		1,377			1,457			13,534
Expenditures for Assets	806			140		—		1		17			(18		)	946
Deferred Tax Assets	9			12		9		9		17			(30		)	26
2010
External Revenue	$	2,367		$	979	$	553	$	692	$	37		$	(27	)	$	4,601
Intersegment Revenue	7			1		—		182		410			(600		)	—
Operating Income	554			140		n/a		n/a		19			55			768
Interest Expense	22			24		1		—		3			216			266
Depreciation and Amortization	263			63		4		—		29			(24		)	335
Income Tax Expense	(1		)	28		19		2		10			101			159
Income Available to Common Shareholders	n/a			n/a		31		4		(6		)	347			376
Segment Assets	7,882			2,161		196		116		1,322			1,291			12,968
Expenditures for Assets	752			107		—		—		41			(24		)	876
Deferred Tax Assets	5			11		9		5		18			(27		)	21
2009
External Revenue	$	2,141		$	948	$	522	$	616	$	37		$	(27	)	$	4,237
Intersegment Revenue	8			1		—		161		416			(586		)	—
Operating Income	504			132		n/a		n/a		19			44			699
Interest Expense	15			21		—		—		4			193			233
Depreciation and Amortization	244			61		4		—		28			(21		)	316
Income Tax Expense	—			28		15		2		9			113			167
Income Available to Common Shareholders	n/a			n/a		24		3		(12		)	333			348
Segment Assets	7,312			2,040		183		99		1,205			1,255			12,094
Expenditures for Assets	817			76		—		1		130			(110		)	914
Deferred Tax Assets	—			10		8		6		19			(43		)	—