Fair Value Measurements - Schedule of Changes in SCE's Fair Value of Level 3 (Details) - SCE - Level 3 - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | ||
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Jun. 30, 2025 |
Jun. 30, 2024 |
Jun. 30, 2025 |
Jun. 30, 2024 |
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| Fair Value Disclosures Level 3 [Roll Forward] | ||||
| Fair value of net assets at beginning of period | $ 156 | $ 80 | $ 212 | $ 91 |
| Settlements | (4) | 4 | (14) | 4 |
| Total realized/unrealized gains (losses) | 27 | (5) | (19) | (16) |
| Fair value of net assets at end of period | $ 179 | $ 79 | $ 179 | $ 79 |
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- Definition This element represents total gains or losses for the period (realized and unrealized), included in regulatory assets and liabilities measured at fair value on a recurring basis using unobservable inputs (level 3). No definition available.
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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. No definition available.
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- Definition Amount of settlements of financial instrument classified as a derivative asset (liability) after deduction of derivative liability, measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Fair value of financial instrument classified as derivative asset (liability) after deduction of derivative liability (asset), measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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