Regulatory Assets and Liabilities - Balancing Accounts (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
SCE
Component Of Balancing Account [Line Items]
Assets, net of liabilities	$ 423	$ 1,660
Energy procurement related costs | SCE
Component Of Balancing Account [Line Items]
Assets, net of liabilities	(97)	397
Public purpose and energy efficiency | SCE
Component Of Balancing Account [Line Items]
Assets, net of liabilities	(1,708)	(1,736)
GRC related balancing accounts | SCE
Component Of Balancing Account [Line Items]
Assets, net of liabilities	976	1,361
FERC related balancing accounts | SCE
Component Of Balancing Account [Line Items]
Assets, net of liabilities	125	(211)
Wildfire risk mitigation and insurance | SCE
Component Of Balancing Account [Line Items]
Assets, net of liabilities	741	1,169
Wildfire and drought restoration | SCE
Component Of Balancing Account [Line Items]
Assets, net of liabilities	238	417
Tax accounting memorandum account | SCE
Component Of Balancing Account [Line Items]
Assets, net of liabilities	(40)	108
Other | SCE
Component Of Balancing Account [Line Items]
Assets, net of liabilities	$ 188	$ 155
Vegetation Management Balancing Account
Component Of Balancing Account [Line Items]
Authorized recovery threshold	115.00%
Wildfire Mitigation Risk Balancing Account
Component Of Balancing Account [Line Items]
Authorized recovery threshold	110.00%