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Debt and Credit Agreements (Credit Facilities) (Details)
$ in Millions
3 Months Ended
Mar. 31, 2024
USD ($)
Line of Credit Facility  
Commitment $ 4,850
Outstanding borrowings 775
Outstanding letters of credit 17
Amount available 4,058
Edison International Parent and Other | Multi-year credit facilities  
Line of Credit Facility  
Commitment 1,500
Outstanding borrowings 263
Amount available 1,237
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 $ 263
Weighted average interest rate (as a percent) 5.51%
SCE | Multi-year credit facilities  
Line of Credit Facility  
Commitment $ 3,350
Outstanding borrowings 512
Outstanding letters of credit 17
Amount available 2,821
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 $ 511
Weighted average interest rate (as a percent) 5.58%
SCE | Standby letters of credit  
Line of Credit Facility  
Commitment $ 625
Outstanding letters of credit 100
Amount available $ 525