Commitments and Contingencies (Expense summary) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
2017/2018 Wildfire/Mudslide Events
Commitments and Contingencies
Charge for wildfire-related claims	$ 490	$ 90
Expected revenue from CPUC and FERC customers	(27)	(6)
Total pre-tax charge	463	84
Income tax benefit	(130)	(23)
Total after-tax charge	333	61
2017/2018 Wildfire/Mudslide Events | SCE
Commitments and Contingencies
Charge for wildfire-related claims	490
Expected revenue from CPUC and FERC customers	(27)
Total pre-tax charge	463
Total after-tax charge	333
Other Wildfires
Commitments and Contingencies
Charge for wildfire-related claims	180	6
Expected insurance recoveries	(55)
Expected revenue from CPUC and FERC customers	(7)
Total pre-tax charge	118	6
Income tax benefit	(33)	(2)
Total after-tax charge	85	4
Other Wildfires | Edison Insurance Services-EIS
Commitments and Contingencies
Charge for wildfire-related claims	1
Other Wildfires | SCE
Commitments and Contingencies
Charge for wildfire-related claims	180	6
Expected insurance recoveries	(56)
Expected revenue from CPUC and FERC customers	(7)
Total pre-tax charge	117	6
Income tax benefit	(33)	(2)
Total after-tax charge	$ 84	$ 4