Supplemental Cash Flows Information (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Cash payments (receipts) for interest and taxes:
Interest, net of amounts capitalized	$ 477	$ 452	$ 423
Tax payments (refunds), net	28	(165)	(119)
Details of debt exchange:
Pollution-control bonds redeemed	0	0	(86)
Pollution-control bonds issued	0	0	86
Southern California Edison
Cash payments (receipts) for interest and taxes:
Interest, net of amounts capitalized	462	437	408
Tax payments (refunds), net	28	(279)	(86)
Details of debt exchange:
Pollution-control bonds redeemed	0	0	(86)
Pollution-control bonds issued	0	0	86
Dividends declared but not paid:
Accrued capital expenditures	661	671	685
Common Stock
Dividends declared but not paid:
Dividends declared but not paid	116	110	106
Common Stock | Southern California Edison
Dividends declared but not paid:
Dividends declared but not paid	0	0	0
Preferred Stock and Preference Stock
Dividends declared but not paid:
Dividends declared but not paid	30	24	11
Preferred Stock and Preference Stock | Southern California Edison
Dividends declared but not paid:
Dividends declared but not paid	$ 30	$ 24	$ 11