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Accumulated Other Comprehensive Loss (Tables) | 12 Months Ended
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Dec. 31, 2012
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract] |
Components of Accumulated Other Comprehensive Loss | Accumulated other comprehensive loss consists of:
(in millions) | Unrealized Gain (Loss) on Cash Flow Hedges |  | Pension and PBOP – Net Loss |  | Pension and PBOP – Prior Service Cost |  | Accumulated Other Comprehensive Loss
Edison International: |  |  |  |  |  |  |
Balance at December 31, 2010 | $ | 16 |  |  | $ | (87 | ) |  | $ | (5 | ) |  | $ | (76 | )
Change for 2011 | (50 | ) |  | (13 | ) |  | — |  |  | (63 | )
Balance at December 31, 2011 | (34 | ) |  | (100 | ) |  | (5 | ) |  | (139 | )
Change for 2012 | 34 |  |  | 13 |  |  | 5 |  |  | 52 |
Balance at December 31, 2012 | $ | — |  |  | $ | (87 | ) |  | $ | — |  |  | $ | (87 | )
SCE: |  |  |  |  |  |  |
Balance at December 31, 2010 |  |  | $ | (25 | ) |  | $ | — |  |  | $ | (25 | )
Change for 2011 |  |  | 1 |  |  | — |  |  | 1 |
Balance at December 31, 2011 |  |  | (24 | ) |  | — |  |  | (24 | )
Change for 2012 |  |  | (5 | ) |  | — |  |  | (5 | )
Balance at December 31, 2012 |  |  | $ | (29 | ) |  | $ | — |  |  | $ | (29 | )

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- Definition Tabular disclosure of the components of accumulated other comprehensive income (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=20435746&loc=SL7669686-108580 + Details
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