XML 111 R64.htm IDEA: XBRL DOCUMENT
v2.4.1.9

Debt and Credit Agreements (Additional Information) (Details) (USD $) | 12 Months Ended |  |  |
--- | --- | --- | --- | ---
Dec. 31, 2014 MW | Dec. 31, 2013 | Mar. 31, 2014 | Jan. 31, 2015
Short-term Debt [Line Items] |  |  |  |
Outstanding borrowings | $ 619,000,000 us-gaap_LineOfCreditFacilityAmountOutstanding | $ 34,000,000 us-gaap_LineOfCreditFacilityAmountOutstanding |  |
Short-term debt | 1,291,000,000 us-gaap_ShortTermBorrowings | 209,000,000 us-gaap_ShortTermBorrowings |  |
Weighted average interest rate (as a percent) | 0.45%us-gaap_ShortTermDebtWeightedAverageInterestRate | 0.55%us-gaap_ShortTermDebtWeightedAverageInterestRate |  |
Non-recourse Solar Rooftop Project Equity Investment Financing |  |  |  |
Short-term Debt [Line Items] |  |  |  |
Debt Instrument, Face Amount | 80,000,000 us-gaap_DebtInstrumentFaceAmount / us-gaap_DebtInstrumentAxis = eix_NonrecourseSolarRooftopProjectEquityInvestmentFinancingMember |  |  |
Non-recourse Solar Rooftop Project Investment Financing |  |  |  |
Short-term Debt [Line Items] |  |  |  |
Weighted average interest rate (as a percent) | 2.67%us-gaap_ShortTermDebtWeightedAverageInterestRate / us-gaap_DebtInstrumentAxis = eix_NonrecourseSolarRooftopProjectInvestmentFinancingMember |  |  |
Debt Instrument, Face Amount | 31,600,000 us-gaap_DebtInstrumentFaceAmount / us-gaap_DebtInstrumentAxis = eix_NonrecourseSolarRooftopProjectInvestmentFinancingMember |  |  |
Power generating capacity (in megawatts) | 35 eix_PowerGeneratingCapacityOfProjectsOwnedControlled / us-gaap_DebtInstrumentAxis = eix_NonrecourseSolarRooftopProjectInvestmentFinancingMember |  |  |
Debt Instrument, Term | 7 years |  |  |
Outstanding balance | 5,100,000 us-gaap_DebtCurrent / us-gaap_DebtInstrumentAxis = eix_NonrecourseSolarRooftopProjectInvestmentFinancingMember |  |  |
Revolving credit facility maturing in July 2018 |  |  |  |
Short-term Debt [Line Items] |  |  |  |
Commitment | 1,250,000,000 us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity / us-gaap_DebtInstrumentAxis = eix_CreditFacilityJuly2018Member |  |  |
Outstanding borrowings | 619,000,000 us-gaap_LineOfCreditFacilityAmountOutstanding / us-gaap_DebtInstrumentAxis = eix_CreditFacilityJuly2018Member |  |  |
Outstanding letters of credit | 0 us-gaap_LettersOfCreditOutstandingAmount / us-gaap_DebtInstrumentAxis = eix_CreditFacilityJuly2018Member |  |  |
Amount available | 631,000,000 us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity / us-gaap_DebtInstrumentAxis = eix_CreditFacilityJuly2018Member |  |  |
Southern California Edison |  |  |  |
Short-term Debt [Line Items] |  |  |  |
Short-term debt | 667,000,000 us-gaap_ShortTermBorrowings / dei_LegalEntityAxis = eix_SouthernCaliforniaEdisonCompanyMember | 175,000,000 us-gaap_ShortTermBorrowings / dei_LegalEntityAxis = eix_SouthernCaliforniaEdisonCompanyMember |  |
Southern California Edison | Revolving credit facility maturing in July 2018 |  |  |  |
Short-term Debt [Line Items] |  |  |  |
Commitment | 2,750,000,000 us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity / us-gaap_DebtInstrumentAxis = eix_CreditFacilityJuly2018Member / dei_LegalEntityAxis = eix_SouthernCaliforniaEdisonCompanyMember |  |  |
Outstanding borrowings | 367,000,000 us-gaap_LineOfCreditFacilityAmountOutstanding / us-gaap_DebtInstrumentAxis = eix_CreditFacilityJuly2018Member / dei_LegalEntityAxis = eix_SouthernCaliforniaEdisonCompanyMember |  |  |
Outstanding letters of credit | (109,000,000)us-gaap_LettersOfCreditOutstandingAmount / us-gaap_DebtInstrumentAxis = eix_CreditFacilityJuly2018Member / dei_LegalEntityAxis = eix_SouthernCaliforniaEdisonCompanyMember |  |  |
Amount available | 2,274,000,000 us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity / us-gaap_DebtInstrumentAxis = eix_CreditFacilityJuly2018Member / dei_LegalEntityAxis = eix_SouthernCaliforniaEdisonCompanyMember |  |  |
Southern California Edison | First and refunding mortgage bonds: |  |  |  |
Short-term Debt [Line Items] |  |  |  |
Debt Instrument, Face Amount |  |  | 300,000,000 us-gaap_DebtInstrumentFaceAmount / us-gaap_DebtInstrumentAxis = eix_FirstAndRefundingMortgageBondsMember / dei_LegalEntityAxis = eix_SouthernCaliforniaEdisonCompanyMember |
Southern California Edison | Amortizing First and Refunding Mortgage Bonds Due in 2022 | Subsequent Event |  |  |  |
Short-term Debt [Line Items] |  |  |  |
Debt Instrument, Face Amount |  |  |  | 550,000,000 us-gaap_DebtInstrumentFaceAmount / us-gaap_DebtInstrumentAxis = eix_AmortizingFirstandRefundingMortgageBondsDuein2022Member / dei_LegalEntityAxis = eix_SouthernCaliforniaEdisonCompanyMember / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember
Interest rate on debt (as a percent) |  |  |  | 1.845%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = eix_AmortizingFirstandRefundingMortgageBondsDuein2022Member / dei_LegalEntityAxis = eix_SouthernCaliforniaEdisonCompanyMember / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember
Southern California Edison | First and Refunding Mortgage Bonds Due in 2022 | Subsequent Event |  |  |  |
Short-term Debt [Line Items] |  |  |  |
Debt Instrument, Face Amount |  |  |  | 325,000,000 us-gaap_DebtInstrumentFaceAmount / us-gaap_DebtInstrumentAxis = eix_FirstandRefundingMortgageBondsDuein2022Member / dei_LegalEntityAxis = eix_SouthernCaliforniaEdisonCompanyMember / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember
Interest rate on debt (as a percent) |  |  |  | 2.40%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = eix_FirstandRefundingMortgageBondsDuein2022Member / dei_LegalEntityAxis = eix_SouthernCaliforniaEdisonCompanyMember / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember
Southern California Edison | First and Refunding Mortgage Bonds Due in 2045 | Subsequent Event |  |  |  |
Short-term Debt [Line Items] |  |  |  |
Debt Instrument, Face Amount |  |  |  | 425,000,000 us-gaap_DebtInstrumentFaceAmount / us-gaap_DebtInstrumentAxis = eix_FirstandRefundingMortgageBondsDuein2045Member / dei_LegalEntityAxis = eix_SouthernCaliforniaEdisonCompanyMember / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember
Interest rate on debt (as a percent) |  |  |  | 3.60%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = eix_FirstandRefundingMortgageBondsDuein2045Member / dei_LegalEntityAxis = eix_SouthernCaliforniaEdisonCompanyMember / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember
Commercial paper | Southern California Edison | Revolving credit facility maturing in July 2018 |  |  |  |
Short-term Debt [Line Items] |  |  |  |
Short-term debt |  | $ 175,000,000 us-gaap_ShortTermBorrowings / us-gaap_DebtInstrumentAxis = eix_CreditFacilityJuly2018Member / dei_LegalEntityAxis = eix_SouthernCaliforniaEdisonCompanyMember / us-gaap_ShortTermDebtTypeAxis = us-gaap_CommercialPaperMember |  |
Weighted average interest rate (as a percent) | 0.40%us-gaap_ShortTermDebtWeightedAverageInterestRate / us-gaap_DebtInstrumentAxis = eix_CreditFacilityJuly2018Member / dei_LegalEntityAxis = eix_SouthernCaliforniaEdisonCompanyMember / us-gaap_ShortTermDebtTypeAxis = us-gaap_CommercialPaperMember | 0.24%us-gaap_ShortTermDebtWeightedAverageInterestRate / us-gaap_DebtInstrumentAxis = eix_CreditFacilityJuly2018Member / dei_LegalEntityAxis = eix_SouthernCaliforniaEdisonCompanyMember / us-gaap_ShortTermDebtTypeAxis = us-gaap_CommercialPaperMember |  |
Letters of credit | Southern California Edison | Revolving credit facility maturing in July 2018 |  |  |  |
Short-term Debt [Line Items] |  |  |  |
Letters of credit expiration period | 12 months |  |  |

X
- Definition Power generating capacity of the project owned and/or controlled by the entity. + References No definition available. + Details
Name: | eix_PowerGeneratingCapacityOfProjectsOwnedControlled
Namespace Prefix: | eix_
Data Type: | num:powerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Short-term Debt, Expiration Period + References No definition available. + Details
Name: | eix_ShortTermDebtExpirationPeriod
Namespace Prefix: | eix_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of short-term debt and current maturity of long-term debt and capital lease obligations due within one year or the normal operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19,20) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19 -Article 5 + Details
Name: | us-gaap_DebtCurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Face (par) amount of debt instrument at time of issuance. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6584090&loc=d3e28878-108400 + Details
Name: | us-gaap_DebtInstrumentFaceAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Contractual interest rate for funds borrowed, under the debt agreement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
Name: | us-gaap_DebtInstrumentTerm
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition The total amount of the contingent obligation under letters of credit outstanding as of the reporting date. + References No definition available. + Details
Name: | us-gaap_LettersOfCreditOutstandingAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount borrowed under the credit facility as of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 22 -Article 5 + Details
Name: | us-gaap_LineOfCreditFacilityAmountOutstanding
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 22 -Article 5 + Details
Name: | us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 22 -Article 5 + Details
Name: | us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Reflects the total carrying amount as of the balance sheet date of debt having initial terms less than one year or the normal operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19 -Subparagraph a -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(a)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.13) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.(a),16(a)(1)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 16 -Subparagraph a(1) -Article 7 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 13 -Subparagraph 2, 3 -Article 9 + Details
Name: | us-gaap_ShortTermBorrowings
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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

X
- Definition Weighted average interest rate of short-term debt outstanding. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19 -Subparagraph b -Article 5 + Details
Name: | us-gaap_ShortTermDebtWeightedAverageInterestRate
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | dei_LegalEntityAxis=eix_SouthernCaliforniaEdisonCompanyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=eix_CreditFacilityJuly2018Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=eix_NonrecourseSolarRooftopProjectEquityInvestmentFinancingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=eix_NonrecourseSolarRooftopProjectInvestmentFinancingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ShortTermDebtTypeAxis=us-gaap_CommercialPaperMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ShortTermDebtTypeAxis=us-gaap_LetterOfCreditMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |