Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2014

Accounting Policies [Abstract]

Schedule of Error Corrections and Prior Period Adjustments

The following table presents the changes to the line items of the consolidated cash flow statements for the revision for the year ended December 31, 2013:

	Edison International									SCE
(in millions)	As Reported			Adjustment			As Revised			As Reported			Adjustment			As Revised
Nuclear decommissioning trusts	$	312		$	(236	)	$	76		$	312		$	(236	)	$	76
Total cash provided by operating activities	3,203			(236		)	2,967			3,284			(236		)	3,048
Purchases of nuclear decommissioning trust investments	(5,951		)	236			(5,715		)	(5,951		)	236			(5,715		)
Total cash used by investing activities	(3,808		)	236			(3,572		)	(3,783		)	236			(3,547		)

Cash Equivalents

The cash equivalents were as follows:

	Edison International				SCE
	December 31,
(in millions)	2014		2013		2014		2013
Money market funds	$	35	$	68	$	5	$	8

Cash is temporarily invested until required for check clearing. 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
	December 31,
(in millions)	2014		2013		2014		2013
Book balances reclassified to accounts payable	$	180	$	168	$	177	$	163

Estimated Useful Lives (Authorized by the CPUC) and Weighted-Average Useful Lives of Property, Plant and Equipment

Estimated useful lives (authorized by the CPUC) and weighted-average useful lives of SCE's property, plant and equipment, are as follows:

	Estimated Useful Lives	Weighted-Average Useful Lives
Generation plant	10 years to 60 years	38 years
Distribution plant	20 years to 60 years	40 years
Transmission plant	40 years to 65 years	48 years
General plant and other	5 years to 60 years	22 years

Reconciliation of the Changes in ARO Liability

The following table summarizes the changes in SCE's ARO liability, including San Onofre and Palo Verde:

	December 31,
(in millions)	2014			2013
Beginning balance	$	3,418		$	2,782
Accretion1	192			182
Revisions	(790		)	455
Liabilities settled	(1		)	(1		)
Ending balance	$	2,819		$	3,418

¹  An ARO represents the present value of a future obligation. Accretion is an increase in the liability to account for the time value of money resulting from discounting.

Amortization of deferred financing costs

Amortization of deferred financing costs charged to interest expense is as follows:

	Edison International						SCE
	Years ended December 31,
(in millions)	2014		2013		2012		2014		2013		2012
Amortization of deferred financing costs charged to interest expense	$	36	$	33	$	30	$	32	$	32	$	29

EPS Attributable to Edison International Common Shareholders

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

	Years ended December 31,
(in millions)	2014			2013		2012
Basic earnings per share – continuing operations:
Income from continuing operations attributable to common shareholders	$	1,427		$	879	$	1,503
Participating securities dividends	(1		)	—		—
Income from continuing operations available to common shareholders	$	1,426		$	879	$	1,503
Weighted average common shares outstanding	326			326		326
Basic earnings per share – continuing operations	$	4.38		$	2.70	$	4.61
Diluted earnings per share – continuing operations:
Income from continuing operations available to common shareholders	$	1,426		$	879	$	1,503
Income impact of assumed conversions	1			1		(1		)
Income from continuing operations available to common shareholders and assumed conversions	$	1,427		$	880	$	1,502
Weighted average common shares outstanding	326			326		326
Incremental shares from assumed conversions	3			3		4
Adjusted weighted average shares – diluted	329			329		330
Diluted earnings per share – continuing operations	$	4.33		$	2.67	$	4.55