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Debt and Credit Agreements (Credit Facilities) (Details)
$ in Millions
6 Months Ended
Jun. 30, 2024
USD ($)
Line of Credit Facility  
Commitment $ 4,850
Outstanding borrowings 1,506
Outstanding letters of credit 9
Amount available 3,335
Edison International Parent and Other | Multi-year credit facilities  
Line of Credit Facility  
Commitment 1,500
Amount available 1,500
Contingent maximum available borrowing $ 2,000
Edison International Parent and Other | Multi-year credit facilities | Secured Overnight Financing Rate ("SOFR")  
Line of Credit Facility  
Variable rate on debt (as a percent) 1.28%
Edison International Parent and Other | Multi-year credit facilities | Commercial paper  
Line of Credit Facility  
Outstanding borrowings $ 0
SCE | Multi-year credit facilities  
Line of Credit Facility  
Commitment 3,350
Outstanding borrowings 1,506
Outstanding letters of credit 9
Amount available 1,835
Contingent maximum available borrowing $ 4,000
SCE | Multi-year credit facilities | Secured Overnight Financing Rate ("SOFR")  
Line of Credit Facility  
Variable rate on debt (as a percent) 1.08%
SCE | Multi-year credit facilities | Commercial paper  
Line of Credit Facility  
Outstanding borrowings $ 1,500
Weighted average interest rate (as a percent) 5.64%
SCE | Standby letters of credit  
Line of Credit Facility  
Commitment $ 625
Outstanding letters of credit 104
Amount available $ 521