Commitments and Contingencies (Accrual roll forward) (Details) $ in Millions	12 Months Ended
	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)
Loss contingency accrual roll forward
Wildfire-related claims, current	$ 30	$ 121
Wildfire-related claims, non-current	1,368	1,687
2017/2018 Wildfire/Mudslide Events
Loss contingency accrual roll forward
Balance, beginning	1,119
Increase in accrued estimated losses	630	1,296
Amounts paid	(1,034)
Balance, end	715	1,119
Wildfire-related claims, current	30	121
Wildfire-related claims, non-current	1,368	1,687
2017/2018 Wildfire/Mudslide Events | SED Settlement
Loss contingency accrual roll forward
Wildfire-related claims, current	14	56
Wildfire-related claims, non-current	48	64
2017/2018 Wildfire/Mudslide Events | Settled Litigation
Loss contingency accrual roll forward
Wildfire-related claims, current	16	65
2017/2018 Wildfire/Mudslide Events | Estimated Losses for Remaining Alleged and Potential Claims
Loss contingency accrual roll forward
Wildfire-related claims, non-current	637	934
Other Wildfire Related Claims
Loss contingency accrual roll forward
Wildfire-related claims, non-current	683	689
Post-2018 Wildfires
Loss contingency accrual roll forward
Balance, beginning	682
Increase in accrued estimated losses	184	572
Amounts paid	(190)
Balance, end	676	682
SCE
Loss contingency accrual roll forward
Wildfire-related claims, current	30	121
Wildfire-related claims, non-current	1,368	1,687
SCE | 2017/2018 Wildfire/Mudslide Events
Loss contingency accrual roll forward
Increase in accrued estimated losses	630
SCE | 2017/2018 Wildfire/Mudslide Events | SED Settlement
Loss contingency accrual roll forward
Balance, end	62
SCE | 2017/2018 Wildfire/Mudslide Events | Settled Litigation
Loss contingency accrual roll forward
Balance, end	78
SCE | 2017/2018 Wildfire/Mudslide Events | Settled Litigation | SED Settlement
Loss contingency accrual roll forward
Balance, end	62
SCE | 2017/2018 Wildfire/Mudslide Events | Estimated Losses for Remaining Alleged and Potential Claims
Loss contingency accrual roll forward
Balance, end	637
SCE | Post-2018 Wildfires
Loss contingency accrual roll forward
Increase in accrued estimated losses	$ 184	$ 572