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Cover Page - USD ($)
 12 Months Ended
Dec. 31, 2019
Feb. 20, 2020
Jun. 28, 2019
Entity Information [Line Items]      
Document Type 10-K    
Document Annual Report true    
Document Period End Date Dec. 31, 2019    
Document Transition Report false    
Entity File Number 1-9936    
Entity Registrant Name EDISON INTERNATIONAL    
Entity Incorporation, State or Country Code CA    
Entity Tax Identification Number 95-4137452    
Entity Address, Address Line One 2244 Walnut Grove Avenue    
Entity Address, Address Line Two (P.O. Box 976)    
Entity Address, City or Town Rosemead,    
Entity Address, State or Province CA    
Entity Address, Postal Zip Code 91770    
City Area Code (626)    
Local Phone Number 302-2222    
Title of 12(b) Security Common Stock, no par value    
Trading Symbol EIX    
Security Exchange Name NYSE    
Entity Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Large Accelerated Filer    
Entity Small Business false    
Entity Emerging Growth Company false    
Entity Shell Company false    
Entity Public Float     $ 22,000,000,000.0
Entity Common Stock, Shares Outstanding   362,570,075,000,000  
Documents Incorporated by Reference
DOCUMENTS INCORPORATED BY REFERENCE
Designated portions of the Proxy Statement relating to registrants' joint 2020 Annual Meeting of Shareholders are incorporated by reference into Part III of this report. 		   
Entity Central Index Key 0000827052    
Current Fiscal Year End Date --12-31    
Document Fiscal Year Focus 2019    
Document Fiscal Period Focus FY    
Amendment Flag false    
Southern California Edison Company      
Entity Information [Line Items]      
Entity File Number 1-2313    
Entity Registrant Name SOUTHERN CALIFORNIA EDISON COMPANY    
Entity Incorporation, State or Country Code CA    
Entity Tax Identification Number 95-1240335    
Entity Address, Address Line One 2244 Walnut Grove Avenue    
Entity Address, Address Line Two (P.O. Box 800)    
Entity Address, City or Town Rosemead,    
Entity Address, State or Province CA    
Entity Address, Postal Zip Code 91770    
City Area Code (626)    
Local Phone Number 302-1212    
Entity Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Non-accelerated Filer    
Entity Small Business false    
Entity Emerging Growth Company false    
Entity Shell Company false    
Entity Public Float     $ 0
Entity Common Stock, Shares Outstanding   434,888,104,000,000  
Entity Central Index Key 0000092103    
Current Fiscal Year End Date --12-31    
Document Fiscal Year Focus 2019    
Document Fiscal Period Focus FY    
Amendment Flag false    
Southern California Edison Company | Cumulative Preferred Stock, 4.08% Series | NYSE American LLC      
Entity Information [Line Items]      
Title of 12(b) Security Cumulative Preferred Stock, 4.08% Series    
Trading Symbol SCEpB    
Security Exchange Name NYSEAMER    
Southern California Edison Company | Cumulative Preferred Stock, 4.24% Series | NYSE American LLC      
Entity Information [Line Items]      
Title of 12(b) Security Cumulative Preferred Stock, 4.24% Series    
Trading Symbol SCEpC    
Security Exchange Name NYSEAMER    
Southern California Edison Company | Cumulative Preferred Stock, 4.32% Series | NYSE American LLC      
Entity Information [Line Items]      
Title of 12(b) Security Cumulative Preferred Stock, 4.32% Series    
Trading Symbol SCEpD    
Security Exchange Name NYSEAMER    
Southern California Edison Company | Cumulative Preferred Stock, 4.78% Series | NYSE American LLC      
Entity Information [Line Items]      
Title of 12(b) Security Cumulative Preferred Stock, 4.78% Series    
Trading Symbol SCEpE    
Security Exchange Name NYSEAMER