Supplemental Cash Flows Information (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Cash payments (receipts):
Interest, net of amounts capitalized	$ 348	$ 326
Income taxes, net	0	0
Common stock
Non-cash financing and investing activities:
Dividends declared but not paid	300	282
Preferred stock
Non-cash financing and investing activities:
Dividends declared but not paid	9	8
SCE
Cash payments (receipts):
Interest, net of amounts capitalized	322	292
Income taxes, net	0	0
Non-cash financing and investing activities:
Accrued capital expenditures	620	592
SCE | Common stock
Non-cash financing and investing activities:
Dividends declared but not paid	360	350
SCE | Preferred stock
Non-cash financing and investing activities:
Dividends declared but not paid	$ 9	$ 8