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Debt and Credit Agreements - Narrative (Details) - USD ($) $ in Millions	Sep. 30, 2025	Mar. 31, 2025
Debt
Commitment	$ 4,850
Outstanding Letters of Credit	2
SCE
Debt
Debt carrying amount	3,000
Debt Instrument Senior Notes 6.25 Percent Due 2030 | Edison International Parent and Other
Debt
Debt carrying amount		$ 550
Rate (as a percent)		6.25%
Standby letters of credit | SCE
Debt
Commitment	660
Outstanding Letters of Credit	$ 193

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