Supplemental Cash Flows Information (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
Cash payments (receipts) for interest and taxes:
Interest, net of amounts capitalized	$ 412	$ 431
Tax payments (refunds), net	190	27
Dividends declared but not paid:
Notes Issued	410	0
Common Stock
Dividends declared but not paid:
Dividends declared but not paid	116	110
Preferred Stock and Preference Stock
Dividends declared but not paid:
Dividends declared but not paid	4	4
Southern California Edison
Cash payments (receipts) for interest and taxes:
Interest, net of amounts capitalized	411	415
Tax payments (refunds), net	15	18
Dividends declared but not paid:
Notes Issued	0	0
Accrued capital expenditures	505	401
Southern California Edison | Common Stock
Dividends declared but not paid:
Dividends declared but not paid	126	120
Southern California Edison | Preferred Stock and Preference Stock
Dividends declared but not paid:
Dividends declared but not paid	$ 4	$ 4