| Document and Entity Information | Jan. 05, 2021 |
| Document and Entity Information [Abstract] | |
| Document Type | 8-K |
| Document Period End Date | Jan. 5, 2021 |
| 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, Adress 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 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | false |
| Entity Central Index Key | 0000092103 |
| Amendment Flag | false |
