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Regulatory Assets and Liabilities (Details) (USD $) In Millions, unless otherwise specified | Sep. 30, 2014 | Dec. 31, 2013
--- | --- | ---
Regulatory Assets |  |
Regulatory Assets, Current | $ 1,170 | $ 538
Regulatory Asset, Long-term | 7,329 | 7,241
Regulatory Liabilities |  |
Regulatory Liabilities, Current | 794 | 767
Regulatory Liabilities, Long-term | 6,387 | 4,995
Southern California Edison |  |
Regulatory Assets |  |
Regulatory Assets, Current | 1,170 | 538
Regulatory Asset, Long-term | 7,329 | 7,241
Total Regulatory Assets | 8,499 | 7,779
Regulatory Liabilities |  |
Regulatory Liabilities, Current | 794 | 767
Regulatory Liabilities, Long-term | 6,387 | 4,995
Total Regulatory Liabilities | 7,181 | 5,762
Southern California Edison | Regulatory balancing accounts |  |
Regulatory Assets |  |
Regulatory Assets, Current | 1,101 | 484
Regulatory Asset, Long-term | 545 | 818
Southern California Edison | Energy derivatives |  |
Regulatory Assets |  |
Regulatory Assets, Current | 64 | 54
Regulatory Asset, Long-term | 721 | 816
Southern California Edison | Deferred income taxes, net |  |
Regulatory Assets |  |
Regulatory Asset, Long-term | 3,361 | 2,957
Southern California Edison | Other |  |
Regulatory Assets |  |
Regulatory Asset, Long-term | 329 | 402
Regulatory Liabilities |  |
Regulatory Liabilities, Current | 44 | 43
Regulatory Liabilities, Long-term | 23 | 12
Southern California Edison | Pensions and other postretirement benefits |  |
Regulatory Assets |  |
Regulatory Asset, Long-term | 506 | 369
Southern California Edison | Unamortized investments, net |  |
Regulatory Assets |  |
Regulatory Asset, Long-term | 275 | 332
Southern California Edison | San Onofre (nuclear) |  |
Regulatory Assets |  |
Regulatory Assets, Current | 5 | 0
Regulatory Asset, Long-term | 1,386 | 1,325
Regulatory Liabilities |  |
Regulatory Liabilities, Long-term | 677 | 0
Southern California Edison | Unamortized loss on reacquired debt |  |
Regulatory Assets |  |
Regulatory Asset, Long-term | 206 | 222
Southern California Edison | Regulatory balancing accounts |  |
Regulatory Liabilities |  |
Regulatory Liabilities, Current | 750 | 724
Regulatory Liabilities, Long-term | 1,085 | 1,132
Southern California Edison | Costs of Removal |  |
Regulatory Liabilities |  |
Regulatory Liabilities, Long-term | 2,833 | 2,780
Southern California Edison | Asset Retirement Obligations |  |
Regulatory Liabilities |  |
Regulatory Liabilities, Long-term | $ 1,769 | $ 1,071

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- Definition The amount for the individual regulatory asset as itemized in a table of regulatory assets as of the end of the period. + References Reference 1: 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 + Details
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- Definition Carrying amount as of the balance sheet date of capitalized costs of regulated entities that are expected to be recovered through revenue sources within one year or the normal operating cycle, if longer. Such costs are capitalized if they meet both of the following criteria: a. It is probable that future revenue in an amount at least equal to the capitalized cost will result from inclusion of that cost in allowable costs for rate-making purposes. b. Based on available evidence, the future revenue will be provided to permit recovery of the previously incurred cost rather than to provide for expected levels of similar future costs. If the revenue will be provided through an automatic rate-adjustment clause, this criterion requires that the regulator's intent clearly be to permit recovery of the previously incurred cost. + References Reference 1: 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 + Details
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- Definition Carrying amount as of the balance sheet date of capitalized costs of regulated entities that are not expected to be recovered through revenue sources 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 980 -SubTopic 340 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6499975&loc=d3e44250-110382 + Details
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- Definition The amount for the individual regulatory liability as itemized in a table of regulatory liabilities as of the end of the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 980 -SubTopic 405 -Section 25 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6500807&loc=d3e48068-110394 + Details
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- Definition The amount for the individual regulatory current liability as itemized in a table of regulatory current liabilities as of the end of the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 980 -SubTopic 405 -Section 25 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6500807&loc=d3e48068-110394 + Details
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- Definition The amount for the individual regulatory noncurrent liability as itemized in a table of regulatory noncurrent liabilities as of the end of the period. + 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 210.5-02.24) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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