Supplemental Cash Flows Information (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Cash payments (receipts):
Interest, net of amounts capitalized	$ 275	$ 263
Income taxes, net	(60)	(87)
Common Stock
Non-cash financing and investing activities:
Dividends declared but not paid	267	251
Preferred stock
Non-cash financing and investing activities:
Dividends declared but not paid	4	0
SCE
Cash payments (receipts):
Interest, net of amounts capitalized	253	241
Income taxes, net	(42)	(87)
Non-cash financing and investing activities:
Accrued capital expenditures	728	503
SCE | Common Stock
Non-cash financing and investing activities:
Dividends declared but not paid	325	0
SCE | Preferred stock
Non-cash financing and investing activities:
Dividends declared but not paid	$ 4	$ 0