Commitments and Contingencies (Accrual rollforward) (Details) - USD ($) $ in Millions	6 Months Ended		12 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023
Loss contingency accrual roll forward
Wildfire-related claims, current	$ 31		$ 30
Wildfire-related claims, non-current	1,219		1,368
2017/2018 Wildfire/Mudslide Events
Loss contingency accrual roll forward
Balance, beginning	715
Increase in accrued estimated losses	490	$ 90
Amounts paid	(536)
Balance, end	669		715
Wildfire-related claims, non-current	598		637
2017/2018 Wildfire/Mudslide Events | SED Settlement
Loss contingency accrual roll forward
Wildfire-related claims, current	15		14
Wildfire-related claims, non-current	43		48
2017/2018 Wildfire/Mudslide Events | Settled Litigation
Loss contingency accrual roll forward
Wildfire-related claims, current	13		16
Other Wildfires
Loss contingency accrual roll forward
Balance, beginning	683
Increase in accrued estimated losses	180	6
Amounts paid	(282)
Balance, end	581		683
Wildfire-related claims, current	3
Wildfire-related claims, non-current	578		683
SCE
Loss contingency accrual roll forward
Wildfire-related claims, current	31		30
Wildfire-related claims, non-current	1,219		$ 1,368
SCE | 2017/2018 Wildfire/Mudslide Events | SED Settlement
Loss contingency accrual roll forward
Balance, end	58
SCE | 2017/2018 Wildfire/Mudslide Events | Settled Litigation
Loss contingency accrual roll forward
Balance, end	71
SCE | 2017/2018 Wildfire/Mudslide Events | Settled Litigation | SED Settlement
Loss contingency accrual roll forward
Balance, end	58
SCE | 2017/2018 Wildfire/Mudslide Events | Remaining Alleged and Potential Claims
Loss contingency accrual roll forward
Balance, end	598
SCE | Other Wildfires
Loss contingency accrual roll forward
Increase in accrued estimated losses	180	$ 6
Balance, end	$ 581