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Consolidated Balance Sheets (Parenthetical) (USD $) In Millions, except Share data, unless otherwise specified | Dec. 31, 2014 | Dec. 31, 2013
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Receivables, allowances for uncollectible accounts (in dollars) | $ 68 us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent | $ 66 us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent
Utility property, plant and equipment, accumulated depreciation (in dollars) | 8,132 us-gaap_PublicUtilitiesPropertyPlantAndEquipmentAccumulatedDepreciation | 7,493 us-gaap_PublicUtilitiesPropertyPlantAndEquipmentAccumulatedDepreciation
Nonutility property, plant and equipment, accumulated depreciation (in dollars) | 76 us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment | 74 us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment
Common stock, no par value (in dollars per share) | $ 0 us-gaap_CommonStockNoParValue | $ 0 us-gaap_CommonStockNoParValue
Common stock, shares authorized | 800,000,000 us-gaap_CommonStockSharesAuthorized | 800,000,000 us-gaap_CommonStockSharesAuthorized
Common stock, shares issued | 325,811,206 us-gaap_CommonStockSharesIssued | 325,811,206 us-gaap_CommonStockSharesIssued
Common stock, shares outstanding | 325,811,206 us-gaap_CommonStockSharesOutstanding | 325,811,206 us-gaap_CommonStockSharesOutstanding
Southern California Edison |  |
Receivables, allowances for uncollectible accounts (in dollars) | 68 us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent / dei_LegalEntityAxis = eix_SouthernCaliforniaEdisonCompanyMember | 66 us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent / dei_LegalEntityAxis = eix_SouthernCaliforniaEdisonCompanyMember
Utility property, plant and equipment, accumulated depreciation (in dollars) | 8,132 us-gaap_PublicUtilitiesPropertyPlantAndEquipmentAccumulatedDepreciation / dei_LegalEntityAxis = eix_SouthernCaliforniaEdisonCompanyMember | 7,493 us-gaap_PublicUtilitiesPropertyPlantAndEquipmentAccumulatedDepreciation / dei_LegalEntityAxis = eix_SouthernCaliforniaEdisonCompanyMember
Nonutility property, plant and equipment, accumulated depreciation (in dollars) | $ 75 us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment / dei_LegalEntityAxis = eix_SouthernCaliforniaEdisonCompanyMember | $ 70 us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment / dei_LegalEntityAxis = eix_SouthernCaliforniaEdisonCompanyMember
Common stock, no par value (in dollars per share) | $ 0 us-gaap_CommonStockNoParValue / dei_LegalEntityAxis = eix_SouthernCaliforniaEdisonCompanyMember | $ 0 us-gaap_CommonStockNoParValue / dei_LegalEntityAxis = eix_SouthernCaliforniaEdisonCompanyMember
Common stock, shares authorized | 560,000,000 us-gaap_CommonStockSharesAuthorized / dei_LegalEntityAxis = eix_SouthernCaliforniaEdisonCompanyMember | 560,000,000 us-gaap_CommonStockSharesAuthorized / dei_LegalEntityAxis = eix_SouthernCaliforniaEdisonCompanyMember
Common stock, shares issued | 434,888,104 us-gaap_CommonStockSharesIssued / dei_LegalEntityAxis = eix_SouthernCaliforniaEdisonCompanyMember | 434,888,104 us-gaap_CommonStockSharesIssued / dei_LegalEntityAxis = eix_SouthernCaliforniaEdisonCompanyMember
Common stock, shares outstanding | 434,888,104 us-gaap_CommonStockSharesOutstanding / dei_LegalEntityAxis = eix_SouthernCaliforniaEdisonCompanyMember | 434,888,104 us-gaap_CommonStockSharesOutstanding / dei_LegalEntityAxis = eix_SouthernCaliforniaEdisonCompanyMember

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- Definition Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 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 210.5-02.14) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 14 -Article 5 + Details
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- Definition A valuation allowance for trade and other receivables due to an Entity within one year (or the normal operating cycle, whichever is longer) that are expected to be uncollectible. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 4 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=28368275&loc=d3e5074-111524 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.4) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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