Regulatory Assets and Liabilities (Balancing Accounts) (Details) - SCE - USD ($) $ in Millions	Jun. 30, 2024	Dec. 31, 2023
Regulatory Assets and Liabilities
Net regulatory assets (liabilities)	$ 1,725	$ 1,660
Energy procurement related costs
Regulatory Assets and Liabilities
Net regulatory assets (liabilities)	87	397
Public purpose and energy efficiency
Regulatory Assets and Liabilities
Net regulatory assets (liabilities)	(1,897)	(1,736)
GRC related balancing accounts
Regulatory Assets and Liabilities
Net regulatory assets (liabilities)	1,916	1,361
Wildfire and drought restoration
Regulatory Assets and Liabilities
Net regulatory assets (liabilities)	859	1,169
Wildfire expense memorandum account
Regulatory Assets and Liabilities
Net regulatory assets (liabilities)	187	417
Residential uncollectibles balancing account
Regulatory Assets and Liabilities
Net regulatory assets (liabilities)	101
Customer service re-platform memorandum account
Regulatory Assets and Liabilities
Net regulatory assets (liabilities)	81	21
Tax accounting memorandum account
Regulatory Assets and Liabilities
Net regulatory assets (liabilities)	160	108
Other
Regulatory Assets and Liabilities
Net regulatory assets (liabilities)	$ 231	$ (77)