Document and Entity Information	3 Months Ended
	Mar. 31, 2013	Apr. 26, 2013
Document And Entity Information [Abstract]
Entity Registrant Name	EDISON INTERNATIONAL
Entity Central Index Key	0000827052
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Document Type	10-Q
Document Period End Date	Mar. 31, 2013
Document Fiscal Year Focus	2013
Document Fiscal Period Focus	Q1
Amendment Flag	false
Entity Common Stock, Shares Outstanding		325,811,206
Southern California Edison
Document And Entity Information [Abstract]
Entity Registrant Name	SOUTHERN CALIFORNIA EDISON CO
Entity Central Index Key	0000092103
Entity Filer Category	Non-accelerated Filer
Entity Common Stock, Shares Outstanding		434,888,104