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Commitments and Contingencies (Commitments Textual) (Details) (Southern California Edison, USD $) | 12 Months Ended
--- | ---
Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Schedule Of Commitments And Contingencies [Line Items] |  |  |
Operating lease rent expense | $ 78,000,000 | $ 75,000,000 | $ 66,000,000
Decommissioning liability | 3,300,000,000 |  |
Decommissioning estimated cost | 7,100,000,000 |  |
Decommissioning cost escalated rates, low end of range (percent) | 1.50% |  |
Decommissioning cost escalated rates, high end of range (percent) | 7.30% |  |
Decommissioning trusts contribution amount per year | 23,000,000 | 23,000,000 | 23,000,000
Decommissioning funds estimated annual earnings, net of tax percentage, low end of range (percent) | 4.20% |  |
Decommissioning funds estimated annual earnings, net of tax percentage, high end of range (percent) | 5.70% |  |
Decommissioning expense under rate making method | 23,000,000 |  |
Decommissioning active nuclear facilities asset retirement obligation | 3,300,000,000 | 2,600,000,000 |
Decommissioning expenditures to date | 599,000,000 |  |
Renewable Energy Contracts |  |  |
Schedule Of Commitments And Contingencies [Line Items] |  |  |
Number of renewable energy contracts (number of contracts) | 108 |  |
Qualifying Facility Power Purchase Agreements |  |  |
Schedule Of Commitments And Contingencies [Line Items] |  |  |
Number of qualifying small power production facility contracts (number of contracts) | 139 |  |
Combined Heat and Power Contracts |  |  |
Schedule Of Commitments And Contingencies [Line Items] |  |  |
Number of combined heat and power contracts (number of contracts) | 32 |  |
Other Purchase Agreements |  |  |
Schedule Of Commitments And Contingencies [Line Items] |  |  |
Number of tolling arrangements (number of agreements) | 15 |  |
Number of power call options (options) | 4 |  |
Number of resource adequacy contracts (number of contracts) | 55 |  |
Other Contractual Obligations |  |  |
Schedule Of Commitments And Contingencies [Line Items] |  |  |
Costs incurred for other commitments | 153,000,000 | 249,000,000 | 281,000,000
Operating Leases Purchase Power Contracts |  |  |
Schedule Of Commitments And Contingencies [Line Items] |  |  |
Operating lease expense | 1,500,000,000 | 1,300,000,000 | 1,400,000,000
Capital Leases Power Contracts |  |  |
Schedule Of Commitments And Contingencies [Line Items] |  |  |
Capital lease power purchase agreement | 209,000,000 | 216,000,000 |
Capital leases accumulated amortization | 39,000,000 | 33,000,000 |
Capital leases future minimum payments, current | 6,000,000 | 6,000,000 |
Capital leases future minimum payments, noncurrent | 203,000,000 | 210,000,000 |
San Onofre [Member] |  |  |
Schedule Of Commitments And Contingencies [Line Items] |  |  |
Net Regulatory Assets | 1,300,000,000 |  |
San Onofre [Member] | Estimated Losses on Disposal of Nuclear Fuel Inventory [Member] |  |  |
Schedule Of Commitments And Contingencies [Line Items] |  |  |
Net Regulatory Assets | $ 33,000,000 |  |

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- Definition This element represents the carrying amount of net capital leases reflected on the consolidated balance sheets. + References No definition available. + Details
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- Definition The current portion of discounted value of future cash flows under leases meeting the criteria for capitalization. + References No definition available. + Details
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- Definition The noncurrent portion discounted value of future cash flows under leases meeting the criteria for capitalization. + References No definition available. + Details
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- Definition This element represents the asset retirement obligation for decommissioning active and inactive nuclear facilities at the balance sheet date. + References No definition available. + Details
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- Definition This element represents the asset retirement obligation for decommissioning active nuclear facilities at the balance sheet date. + References No definition available. + Details
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- Definition This element represents the high end of the range of the escalated rates under decommissioning cost methodology used for rate-making purpose. + References No definition available. + Details
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- Definition This element represents the low end of the range of the escalated rates under decommissioning cost methodology used for rate-making purpose. + References No definition available. + Details
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- Definition This element represents the total estimated cost to decommission its active nuclear facilities. + References No definition available. + Details
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- Definition This element represents the total nuclear decommissioning expense incurred over the life of the San Onofre Unit 1 project. + References No definition available. + Details
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- Definition This element represents the nuclear decommissioning expense under the rate-making method. + References No definition available. + Details
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- Definition This element represents the high end of the range of the estimated annual after-tax earnings on the decommissioning funds. + References No definition available. + Details
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- Definition This element represents the low end of the range of the estimated annual after-tax earnings on the decommissioning funds. + References No definition available. + Details
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- Definition This element represents the approximate amount of annual contributions received by the independent decommissioning trusts in current year. + References No definition available. + Details
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- Definition Long Term Purchase Commitment Cost Incurred + References No definition available. + Details
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- Definition This element represents the number of renewable energy contracts that were approved by a public utility commission and met critical contract provisions. + References No definition available. + Details
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- Definition The total charge for the use of long-lived depreciable assets subject to a lease meeting the criteria for capitalization. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6455314&loc=d3e45014-112735 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 10 -Section 55 -Paragraph 40 -Subparagraph (Note 2) -URI http://asc.fasb.org/extlink&oid=6584154&loc=d3e38371-112697 + Details
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- Definition Amount of rent expense incurred for leased assets, including but not limited to, furniture and equipment, that is not directly or indirectly associated with the manufacture, sale or creation of a product or product line. + References No definition available. + Details
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- Definition Rental expense for the reporting period incurred under operating leases, including minimum and any contingent rent expense, net of related sublease income. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6453985&loc=d3e41499-112717 + Details
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