Summary of Significant Accounting Policies (Tables)

3 Months Ended

Mar. 31, 2013

Accounting Policies [Abstract]

Cash Equivalents

Checks issued, but not yet paid by the financial institution, are reclassified from cash to accounts payable at the end of each reporting period as follows:

	Edison International				SCE
(in millions)	March 31, 2013		December 31, 2012		March 31, 2013		December 31, 2012
Cash reclassified to accounts payable	$	165	$	247	$	165	$	242

The cash equivalents were as follows:

	Edison International				SCE
(in millions)	March 31, 2013		December 31, 2012		March 31, 2013		December 31, 2012
Money market funds	$	58	$	107	$	5	$	5

Inventory Components

Inventory consisted of the following:

(in millions)	March 31, 2013		December 31, 2012
Materials, supplies and spare parts	$	333	$	319
Fuel	18		21
Total inventory	$	351	$	340

EPS Attributable to Edison International Common Shareholders

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

	Three months ended March 31,
(in millions)	2013		2012
Basic earnings per share – continuing operations:
Income from continuing operations available to common shareholders	$	259	$	177
Weighted average common shares outstanding	326		326
Basic earnings per share – continuing operations	$	0.79	$	0.54
Diluted earnings per share – continuing operations:
Income from continuing operations available to common shareholders	$	259	$	177
Income impact of assumed conversions	—		—
Income from continuing operations available to common shareholders and assumed conversions	$	259	$	177
Weighted average common shares outstanding	326		326
Incremental shares from assumed conversions	3		3
Adjusted weighted average shares – diluted	329		329
Diluted earnings per share – continuing operations	$	0.78	$	0.54