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Investments (Gains and (Losses) for Equity Securities) (Details) - Southern California Edison - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2019 | Sep. 30, 2018
Investment Holdings [Line Items] |  |  |  |
Gross realized gains | $ 19 | $ 28 | $ 64 | $ 115
Gross realized loss | (1) | (7) | (1) | (17)
Net unrealized gains for equity securities | $ 3 | $ 72 | $ 209 | $ 4

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- Definition This item represents the amount of realized loss on investments in trust during the period from the sale of securities. + References No definition available. + Details
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