Supplemental Cash Flows Information (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Cash payments for interest and taxes:
Interest, net of amounts capitalized	$ 301	$ 254
Tax refunds, net	(65)	(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:	12	12
Southern California Edison
Cash payments for interest and taxes:
Interest, net of amounts capitalized	268	233
Tax refunds, net	(101)	(18)
Dividends declared but not paid:
Accrued capital expenditures	463	412
Southern California Edison | Common stock
Dividends declared but not paid:
Dividends declared but not paid:	0	100
Southern California Edison | Preferred and preference stock
Dividends declared but not paid:
Dividends declared but not paid:	$ 12	$ 12