Supplemental Cash Flows Information (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
Cash payments (receipts):
Interest, net of amounts capitalized	$ 1,152	$ 1,034
Income taxes, net	0	0
Common stock
Non-cash financing and investing activities:
Dividends declared but not paid	302	283
Preferred stock
Non-cash financing and investing activities:
Dividends declared but not paid	39	9
SCE
Cash payments (receipts):
Interest, net of amounts capitalized	991	888
Income taxes, net	0	0
Non-cash financing and investing activities:
Accrued capital expenditures	546	584
SCE | Common stock
Non-cash financing and investing activities:
Dividends declared but not paid	720	350
SCE | Preferred stock
Non-cash financing and investing activities:
Dividends declared but not paid	$ 39	$ 9