Supplemental Cash Flows Information (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Cash payments (receipts):
Interest, net of amounts capitalized	$ 689	$ 582
Tax refunds, net	(30)	(65)
Common Stock
Dividends declared but not paid:
Dividends declared but not paid:	241	220
Southern California Edison
Cash payments (receipts):
Interest, net of amounts capitalized	607	518
Tax refunds, net	(29)	(166)
Dividends declared but not paid:
Accrued capital expenditures	490	486
Southern California Edison | Common Stock
Dividends declared but not paid:
Dividends declared but not paid:	$ 0	$ 0