Supplemental Cash Flows Information (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Cash payments for interest and taxes:
Interest, net of amounts capitalized	$ 200	$ 164
Tax refunds, net	0	(93)
Common stock
Dividends declared but not paid:
Dividends declared but not paid:	200	197
Preferred and preference stock
Dividends declared but not paid:
Dividends declared but not paid:	1	1
Southern California Edison
Cash payments for interest and taxes:
Interest, net of amounts capitalized	177	149
Tax refunds, net	0	(18)
Dividends declared but not paid:
Accrued capital expenditures	392	399
Southern California Edison | Common stock
Dividends declared but not paid:
Dividends declared but not paid:	200	212
Southern California Edison | Preferred and preference stock
Dividends declared but not paid:
Dividends declared but not paid:	$ 1	$ 1