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Debt and Credit Agreements - Credit Facilities (Details)
3 Months Ended
Mar. 31, 2025
USD ($)
Line of Credit Facility  
Commitment $ 4,850,000,000
Outstanding borrowings 5,000,000
Outstanding letters of credit 2,000,000
Amount available $ 4,843,000,000
Edison International Parent and Other | Multi-year credit facilities  
Line of Credit Facility  
Variable rate on debt (as a percent) 1.28%
Commitment $ 1,500,000,000
Outstanding borrowings 0
Outstanding letters of credit 0
Amount available 1,500,000,000
Contingent maximum available borrowing 2,000,000,000.0
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  
Variable rate on debt (as a percent) 1.08%
Commitment $ 3,350,000,000
Outstanding borrowings 5,000,000
Outstanding letters of credit 2,000,000
Amount available 3,343,000,000
Contingent maximum available borrowing 4,000,000,000.0
SCE | Multi-year credit facilities | Commercial Paper  
Line of Credit Facility  
Outstanding borrowings $ 5,000,000
Weighted average interest rate (as a percent) 4.85%
SCE | Standby letters of credit  
Line of Credit Facility  
Commitment $ 675,000,000
Outstanding letters of credit 128,000,000
Unused capacity $ 547,000,000