Consolidated Statements of Cash Flows (Parenthetical) - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2018	Mar. 31, 2017
Discounts and issuance costs of long term debt	$ 17	$ 11
Southern California Edison Company
Discounts and issuance costs of long term debt	$ 11	$ 9

Premiums Discounts and Issuance Costs of Long Term Debt

No definition available.

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