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Business Segments (Tables)

3 Months Ended

Mar. 31, 2012

	Three Months Ended March 31,
	2012			2011
Operating revenues:
Regulated electricity segment	$	620		$	648
All other (a)	1			1
Total	$	621		$	649

Net loss attributable to common shareholders:
Regulated electricity segment	$	(6	)	$	(15	)
All other (a)	(2		)	—
Total	$	(8	)	$	(15	)

	As of March 31, 2012		As of December 31, 2011
Assets:
Regulated electricity segment	$	13,142	$	13,068
All other (a)	42		43
Total	$	13,184	$	13,111

(a) All other activities relate to APSES, SunCor, Pinnacle West and El Dorado. See Note 13 for discussion of discontinued operations.

- Definition

Tabular disclosure of the profit or loss and total assets for each reportable segment. An entity discloses certain information on each reportable segment if the amounts (a) are included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) are otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or loss.

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