The amount for the individual regulatory asset as itemized in a table of regulatory assets as of the end of the period.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 71

-Paragraph 9, 10

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 980

-SubTopic 340

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6499975&loc=d3e44250-110382

Name:	us-gaap_RegulatoryAssets
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Regulatory Assets and Liabilities (Textual) (Details) (Southern California Edison, USD $) In Millions, unless otherwise specified			1 Months Ended
	Jun. 30, 2013	Dec. 31, 2012	Jun. 30, 2013 San Onofre (nuclear)	May 31, 2013 San Onofre (nuclear)	Jun. 30, 2013 Nuclear fuel supply commitments Estimated costs related to contract cancellation and management San Onofre (nuclear)
Regulatory Assets [Line Items]
Amount of assets reclassified to a regulatory asset				$ 1,521
Cost of service			56
Increase in regulatory assets			32
Regulatory asset	$ 8,297	$ 6,994			$ 33