Supplemental Cash Flows Information (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Cash payments for interest and taxes:
Interest, net of amounts capitalized	$ 582	$ 509
Tax refunds, net	(65)	(92)
Common Stock
Dividends declared but not paid:
Dividends declared but not paid:	220	197
Southern California Edison
Cash payments for interest and taxes:
Interest, net of amounts capitalized	518	466
Tax refunds, net	(166)	(17)
Dividends declared but not paid:
Accrued capital expenditures	486	421
Southern California Edison | Common Stock
Dividends declared but not paid:
Dividends declared but not paid:	$ 0	$ 314