Supplemental Cash Flows Information (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Cash payments (receipts):
Interest, net of amounts capitalized	$ 372	$ 348
Income taxes, net	0	0
Common stock
Non-cash financing and investing activities:
Dividends declared but not paid	319	300
Preferred Stock
Non-cash financing and investing activities:
Dividends declared but not paid	0	9
SCE
Cash payments (receipts):
Interest, net of amounts capitalized	337	322
Income taxes, net	0	0
Non-cash financing and investing activities:
Accrued capital expenditures	731	620
SCE | Common stock
Non-cash financing and investing activities:
Dividends declared but not paid	430	360
SCE | Preferred Stock
Non-cash financing and investing activities:
Dividends declared but not paid	$ 0	$ 9