Supplemental Cash Flows Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Cash payments (receipts):
Interest, net of amounts capitalized	$ 1,401	$ 1,001	$ 887
Income taxes, net		(49)	(88)
Common stock
Non-cash financing and investing activities:
Dividends declared but not paid	299	282	266
Preferred stock
Non-cash financing and investing activities:
Dividends declared but not paid	9	8	11
Pollution-control Bonds Redeemed At 2.625%
Non-cash financing and investing activities:
Debt exchange	$ (135)
Interest rate on debt (as a percent)	2.625%
Pollution-control Bonds Remarketed At 4.50%
Non-cash financing and investing activities:
Debt exchange	$ (135)
Interest rate on debt (as a percent)	4.50%
SCE
Cash payments (receipts):
Interest, net of amounts capitalized	$ 1,155	864	760
Income taxes, net		(49)	(88)
Non-cash financing and investing activities:
Accrued capital expenditures	680	652	668
SCE | Common stock
Non-cash financing and investing activities:
Dividends declared but not paid	360	350	325
SCE | Preferred stock
Non-cash financing and investing activities:
Dividends declared but not paid	9	$ 8	$ 11
SCE | Pollution-control Bonds Redeemed At 2.625%
Non-cash financing and investing activities:
Debt exchange	(135)
SCE | Pollution-control Bonds Remarketed At 4.50%
Non-cash financing and investing activities:
Debt exchange	$ (135)