Regulatory Assets and Liabilities (Balancing Accounts) (Details) - SCE - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Regulatory Assets and Liabilities
Net regulatory assets (liabilities)	$ 2,289	$ 2,287
Percentage of vegetation management	115.00%	115.00%
Percentage of Wildfire Covered Conductor Program	110.00%	110.00%
Energy resource recovery account
Regulatory Assets and Liabilities
Net regulatory assets (liabilities)	$ 1,580	$ 759
Portfolio allocation balancing account
Regulatory Assets and Liabilities
Net regulatory assets (liabilities)	(73)	(183)
New system generation balancing account
Regulatory Assets and Liabilities
Net regulatory assets (liabilities)	(63)	73
Public purpose programs and energy efficiency programs
Regulatory Assets and Liabilities
Net regulatory assets (liabilities)	(1,577)	(1,066)
Base revenue requirement balancing account
Regulatory Assets and Liabilities
Net regulatory assets (liabilities)	1,108	849
GRC wildfire mitigation balancing accounts
Regulatory Assets and Liabilities
Net regulatory assets (liabilities)	67	12
Greenhouse gas auction revenue and low carbon fuel standard revenue
Regulatory Assets and Liabilities
Net regulatory assets (liabilities)	(289)	(298)
FERC balancing accounts
Regulatory Assets and Liabilities
Net regulatory assets (liabilities)	(123)	55
Wildfire and drought restoration accounts
Regulatory Assets and Liabilities
Net regulatory assets (liabilities)	352	299
Wildfire expense memorandum account
Regulatory Assets and Liabilities
Net regulatory assets (liabilities)	1,168	1,456
COVID 19-related memorandum accounts
Regulatory Assets and Liabilities
Net regulatory assets (liabilities)	67	94
Customer service re-platform (CSRP)
Regulatory Assets and Liabilities
Net regulatory assets (liabilities)	64	128
Tax accounting memorandum account and pole loading balancing account
Regulatory Assets and Liabilities
Net regulatory assets (liabilities)	90	171
Excess Bond and Power Charge Balancing Account
Regulatory Assets and Liabilities
Net regulatory assets (liabilities)	(56)
Other balancing account
Regulatory Assets and Liabilities
Net regulatory assets (liabilities)	$ (26)	$ (62)