Supplemental Cash Flows Information (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Cash payments (receipts):
Interest, net of amounts capitalized	$ 746	$ 634
Income taxes, net	0	0
Common stock
Non-cash financing and investing activities:
Dividends declared but not paid	301	283
Preferred stock
Non-cash financing and investing activities:
Dividends declared but not paid	0	8
SCE
Cash payments (receipts):
Interest, net of amounts capitalized	607	520
Income taxes, net	0	0
Non-cash financing and investing activities:
Accrued capital expenditures	488	489
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	$ 0	$ 8