Debt and Credit Agreements (Details) (USD $)											0 Months Ended
	Jun. 30, 2014	Dec. 31, 2013	Jun. 30, 2014 Southern California Edison	Dec. 31, 2013 Southern California Edison	May 31, 2014 Southern California Edison First and refunding mortgage bonds	Jan. 31, 2014 Southern California Edison First and refunding mortgage bonds	Jun. 30, 2014 Edison International Parent and Other Revolving credit facility	Dec. 31, 2013 Edison International Parent and Other Revolving credit facility	Jun. 30, 2014 Commercial paper Southern California Edison Revolving credit facility	Dec. 31, 2013 Commercial paper Southern California Edison Revolving credit facility	Jun. 30, 2014 Letters of credit Southern California Edison Revolving credit facility	Jun. 30, 2014 Letters of credit Southern California Edison Revolving credit facility
Debt Instrument [Line Items]
Issuance of debt					$ 400,000,000	$ 300,000,000
Outstanding borrowings									(287,000,000)	(175,000,000)
Weighted average interest rate (as a percent)							0.38%	0.55%	0.20%	0.24%
Commitment							1,250,000,000		2,750,000,000
Outstanding letters of credit												(151,000,000)
Letters of credit expiration period											12 months
Short-term debt	$ (1,253,000,000)	$ (209,000,000)	$ (587,000,000)	$ (175,000,000)			$ (666,000,000)	$ (34,000,000)
Stated interest rate on May 2014 mortgage bonds due in May 2017					1.125%