Commitments and Contingencies (Wildfire loss accrual) (Details) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
Loss contingency accrual roll forward
Wildfire-related claims, current	$ 75.0		$ 121.0
Wildfire-related claims, non-current	1,600.0		1,687.0
2017/2018 Wildfire/Mudslide Events
Loss contingency accrual roll forward
Beginning balance	1,119.0
Increase in accrued estimated losses	90.0	$ 416.0
Amounts paid	(221.0)
Ending balance	988.0		1,119.0
Wildfire-related claims, current	15.0		65.0
Wildfire-related claims, non-current	853.0		934.0
2017/2018 Wildfire/Mudslide Events | SED Settlement
Loss contingency accrual roll forward
Wildfire-related claims, current	60.0		56.0
Wildfire-related claims, non-current	60.0		64.0
Other Wildfire Related Claims
Loss contingency accrual roll forward
Wildfire-related claims, non-current	687.0		689.0
Post-2018 Wildfires
Loss contingency accrual roll forward
Beginning balance	682.0
Increase in accrued estimated losses	6.0	$ 105.0
Amounts paid	(7.0)
Ending balance	681.0		682.0
SCE
Loss contingency accrual roll forward
Wildfire-related claims, current	75.0		121.0
Wildfire-related claims, non-current	1,600.0		$ 1,687.0
SCE | Post-2018 Wildfires
Loss contingency accrual roll forward
Ending balance	$ 681.0