Commitments and Contingencies (Expense summary) (Details) - USD ($) $ in Millions	3 Months Ended			9 Months Ended
	Sep. 30, 2024	Mar. 31, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
2017/2018 Wildfire/Mudslide Events
Commitments and Contingencies
Charge for wildfire-related claims			$ 475	$ 490	$ 565
Expected revenue from CPUC and FERC customers			(27)	(27)	(33)
Total pre-tax charge			448	463	532
Income tax benefit			(125)	(130)	(148)
Total after-tax charge			323	333	384
Other Wildfires
Commitments and Contingencies
Charge for wildfire-related claims	$ 4		118	184	124
Expected insurance recoveries	(3)		(111)	(58)	(111)
Expected revenue from CPUC and FERC customers				(7)
Total pre-tax charge	1		7	119	13
Income tax benefit			(2)	(33)	(4)
Total after-tax charge	1		5	86	9
Other Wildfires | Edison Insurance Services-EIS
Commitments and Contingencies
Charge for wildfire-related claims	1	$ 1
Other Wildfires | SCE
Commitments and Contingencies
Charge for wildfire-related claims	4		118	184	124
Expected insurance recoveries	$ (4)		(114)	(60)	(114)
Expected revenue from CPUC and FERC customers				(7)
Total pre-tax charge			4	117	10
Income tax benefit			(1)	(33)	(3)
Total after-tax charge			$ 3	$ 84	$ 7