Consolidated Statements of Cash Flows (Parenthetical) (USD $) In Millions, unless otherwise specified	3 Months Ended
Mar. 31, 2015	Mar. 31, 2014
Premiums Discounts and Issuance Costs of Long Term Debt	$ 13	$ 1
Southern California Edison
Premiums Discounts and Issuance Costs of Long Term Debt	$ 13

Premiums Discounts and Issuance Costs of Long Term Debt

No definition available.

Name:	eix_PremiumsDiscountsandIssuanceCostsofLongTermDebt
Namespace Prefix:	eix_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration