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Regulatory Assets and Liabilities (Schedule of Regulatory Liabilities) (Details) - USD ($) $ in Millions | Dec. 31, 2016 | Dec. 31, 2015
--- | --- | ---
Regulatory Liabilities [Line Items] |  |
Current regulatory liabilities | $ 756 | $ 1,128
Long-term regulatory liabilities | 5,726 | 5,676
SCE |  |
Regulatory Liabilities [Line Items] |  |
Current regulatory liabilities | 756 | 1,128
Long-term regulatory liabilities | 5,726 | 5,676
Total regulatory liabilities | 6,482 | 6,804
SCE | Regulatory balancing accounts |  |
Regulatory Liabilities [Line Items] |  |
Current regulatory liabilities | 736 | 1,106
Long-term regulatory liabilities | 1,180 | 1,314
SCE | Other |  |
Regulatory Liabilities [Line Items] |  |
Current regulatory liabilities | 20 | 22
Long-term regulatory liabilities | 60 | 79
SCE | Costs of removal |  |
Regulatory Liabilities [Line Items] |  |
Long-term regulatory liabilities | 2,847 | 2,781
SCE | Recoveries in excess of ARO liabilities |  |
Regulatory Liabilities [Line Items] |  |
Long-term regulatory liabilities | $ 1,639 | $ 1,502

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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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