Fair Value Measurements - Narrative (Details) - Edison International Parent - USD ($) $ in Millions |
Mar. 31, 2026 |
Dec. 31, 2025 |
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| Level 1 | ||
| Fair Value Measurements | ||
| Money market funds, fair value | $ 50 | $ 51 |
| Level 3 | ||
| Fair Value Measurements | ||
| Short-term investments, fair value | $ 0 | $ 0 |
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- Definition Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Fair value portion of investment securities, including, but not limited to, marketable securities, derivative financial instruments, and investments accounted for under the equity method. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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