XML 33 R89.htm IDEA: XBRL DOCUMENT
v2.4.0.6

Compensation and Benefit Plans (Unrecognized Compensation Costs) (Details) (USD $) In Millions, unless otherwise specified | 12 Months Ended |  | 12 Months Ended |  | 12 Months Ended
--- | --- | --- | --- | --- | ---
Dec. 31, 2012 Employee Stock Option | Dec. 31, 2012 Restricted Stock Units (RSUs) | Dec. 31, 2011 Performance Shares | Dec. 31, 2012 Southern California Edison Employee Stock Option | Dec. 31, 2012 Southern California Edison Restricted Stock Units (RSUs) | Dec. 31, 2011 Southern California Edison Performance Shares
Pension and Other Postretirement Benefits |  |  |  |  |  |
Unrecognized compensation cost, net of expected forfeitures | $ 14 | $ 6 | $ 4 | $ 11 | $ 4 | $ 2
Cost to be recognized in 2013 |  | 4 |  |  | 3 |
Cost to be recognized in 2014 |  | $ 2 |  |  | $ 1 |
Weighed-average period (in years) | 2 years |  | 2 years | 2 years |  | 2 years

X
- Definition As of the balance sheet date, the aggregate unrecognized cost of share-based awards made to employees under share-based compensation plans that have yet to vest which are to be recognized in the next fiscal year. + References No definition available. + Details
Name: | eix_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedToBeRecognizedInNextFiscalYear
Namespace Prefix: | eix_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition As of the balance sheet date, the aggregate unrecognized cost of share-based awards made to employees under share-based compensation plans that have yet to vest which are to be recognized in the second fiscal year from the current fiscal year. + References No definition available. + Details
Name: | eix_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedToBeRecognizedInYearTwo
Namespace Prefix: | eix_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_DefinedBenefitPlanDisclosureLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition As of the balance sheet date, the aggregate unrecognized cost of equity-based awards made to employees under equity-based compensation awards that have yet to vest. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph h -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. + Details
Name: | us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
Name: | us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration