Debt and Credit Agreements (Details) (USD $)										3 Months Ended
	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2014 Southern California Edison	Dec. 31, 2013 Southern California Edison	Jan. 31, 2014 Southern California Edison First and refunding mortgage bonds	Mar. 31, 2014 Edison International Parent and Other Revolving credit facility	Dec. 31, 2013 Edison International Parent and Other Revolving credit facility	Mar. 31, 2014 Commercial paper Southern California Edison Revolving credit facility	Dec. 31, 2013 Commercial paper Southern California Edison Revolving credit facility	Mar. 31, 2014 Letters of credit Southern California Edison Revolving credit facility
Debt Instrument [Line Items]
Issuance of debt					$ 300,000,000
Outstanding borrowings								105,000,000	175,000,000
Weighted average interest rate (as a percent)						0.51%	0.55%	0.20%	0.24%
Commitment						1,250,000,000		2,750,000,000
Outstanding letters of credit										141,000,000
Letters of credit expiration period										12 months
Short-term debt	$ 611,000,000	$ 209,000,000	$ 405,000,000	$ 175,000,000		$ 206,000,000	$ 34,000,000