Investments (Other) (Details) - Edison International Parent and Other - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2022	Dec. 31, 2021
Investments
Marketable securities	$ 5	$ 12
Equity investments without readily determinable fair values	12	3
Cumulative upward adjustments investments without readily determinable fair values	9	1
Marketable securities, Unrealized gains/(losses)	(6)	3
Equity investments without readily determinable fair values - upward adjustments	8	1
Total unrealized gains/(losses)	$ 2	$ 4

Amount of unrealized gain (loss) on investment in debt and equity securities.

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- Definition

Amount of investment in equity security without readily determinable fair value.

+ References

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-Publisher FASB
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Amount of gain from upward price adjustment on investment in equity security without readily determinable fair value.

+ References

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Amount of cumulative gain from upward price adjustment on investment in equity security without readily determinable fair value.

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Amount of investment in marketable security.

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Amount of unrealized gain (loss) on investment in marketable security.

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