Supplemental Cash Flows Information (Details) (USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013
Cash payments (receipts) for interest and taxes:
Interest, net of amounts capitalized	$ 226	$ 213
Tax payments (refunds), net	189	26
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	18	29
Southern California Edison
Cash payments (receipts) for interest and taxes:
Interest, net of amounts capitalized	225	205
Tax payments (refunds), net	14	17
Dividends declared but not paid:
Accrued capital expenditures	451	515
Southern California Edison | Common Stock
Dividends declared but not paid:
Dividends declared but not paid	126	0
Southern California Edison | Preferred Stock and Preference Stock
Dividends declared but not paid:
Dividends declared but not paid	$ 18	$ 29