Supplemental Cash Flows Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Cash payments (receipts):
Interest, net of amounts capitalized	$ 887	$ 836	$ 705
Income taxes, net	(88)	(34)	(85)
Common Stock
Non-cash financing and investing activities:
Dividends declared but not paid	266	251	231
Preferred stock
Non-cash financing and investing activities:
Dividends declared but not paid	11	11	12
SCE
Cash payments (receipts):
Interest, net of amounts capitalized	760	713	615
Income taxes, net	(88)	(50)	(164)
Non-cash financing and investing activities:
Accrued capital expenditures	668	730	643
SCE | Common Stock
Non-cash financing and investing activities:
Dividends declared but not paid	325		200
SCE | Preferred stock
Non-cash financing and investing activities:
Dividends declared but not paid	$ 11	$ 11	$ 12