Summary of Significant Accounting Policies (Deferred Financing Costs) (Details) (USD $)
In Millions, unless otherwise specified |
12 Months Ended | ||
---|---|---|---|
Dec. 31, 2012
|
Dec. 31, 2011
|
Dec. 31, 2010
|
|
Regulatory assets | $ 6,422 | $ 5,466 | |
Unamortized debt issuance expense | 63 | ||
Southern California Edison
|
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Regulatory assets | 6,422 | 5,815 | |
Unamortized debt issuance expense | 67 | 60 | |
Amortization of deferred financing costs | 29 | 33 | 30 |
Southern California Edison | Loss on Reacquired Debt
|
|||
Regulatory assets | 228 | 249 | |
Edison International
|
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Unamortized debt issuance expense | 73 | ||
Amortization of deferred financing costs | $ 30 | $ 34 | $ 30 |