Variable Interest Entities (Summary of Trusts' Income Statement) (Details) - SCE - Variable Interest Entity, Not Primary Beneficiary - USD ($) $ in Millions |
12 Months Ended | ||
---|---|---|---|
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
|
SCE Trust I | |||
Variable Interest Entity [Line Items] | |||
Dividend income | $ 27 | $ 27 | $ 27 |
Dividend distributions | 27 | 27 | 27 |
SCE Trust II | |||
Variable Interest Entity [Line Items] | |||
Dividend income | 20 | 20 | 20 |
Dividend distributions | 20 | 20 | 20 |
SCE Trust III | |||
Variable Interest Entity [Line Items] | |||
Dividend income | 16 | 16 | 13 |
Dividend distributions | 16 | 16 | $ 13 |
SCE Trust IV | |||
Variable Interest Entity [Line Items] | |||
Dividend income | 17 | 6 | |
Dividend distributions | 17 | $ 6 | |
SCE Trust V | |||
Variable Interest Entity [Line Items] | |||
Dividend income | 13 | ||
Dividend distributions | $ 13 |