Supplemental Cash Flows Information (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Cash payments (receipts):
Interest, net of amounts capitalized	$ 369	$ 301
Tax refunds, net	0	(65)
Common Stock
Dividends declared but not paid:
Dividends declared but not paid:	241	200
Preferred and preference stock
Dividends declared but not paid:
Dividends declared but not paid:	12	12
Southern California Edison
Cash payments (receipts):
Interest, net of amounts capitalized	312	268
Tax refunds, net	0	(101)
Dividends declared but not paid:
Accrued capital expenditures	450	463
Southern California Edison | Common Stock
Dividends declared but not paid:
Dividends declared but not paid:	0	0
Southern California Edison | Preferred and preference stock
Dividends declared but not paid:
Dividends declared but not paid:	$ 12	$ 12