Summary of Significant Accounting Policies (Tables)

6 Months Ended

Jun. 30, 2011

Summary of Significant Accounting Policies

Inventory Components

(in millions)	June 30, 2011		December 31, 2010
Coal, gas, fuel oil and other raw materials	$	203	$	184
Spare parts, materials and supplies		386		384
Total inventory	$	589	$	568

EPS computation

EPS attributable to Edison International common shareholders was computed as follows:

	Three months ended June 30,					Six months ended June 30,
(in millions)	2011		2010			2011		2010
Basic earnings per share – continuing operations:
Income from continuing operations attributable to common shareholders, net of tax	$	177	$	343		$	379	$	572
Participating securities dividends		—		(2	)		—		(2	)
Income from continuing operations available to common shareholders	$	177	$	341		$	379	$	570
Weighted average common shares outstanding		326		326			326		326
Basic earnings per share – continuing operations	$	0.54	$	1.05		$	1.16	$	1.75
Diluted earnings per share – continuing operations:
Income from continuing operations available to common shareholders	$	177	$	341		$	379	$	570
Income impact of assumed conversions		1		1			1		1
Income from continuing operations available to common shareholders and assumed conversions	$	178	$	342		$	380	$	571
Weighted average common shares outstanding		326		326			326		326
Incremental shares from assumed conversions		3		1			2		1
Adjusted weighted average shares – diluted		329		327			328		327
Diluted earnings per share – continuing operations	$	0.54	$	1.05		$	1.16	$	1.75