Commitments and Contingencies (Wildfire loss accrual) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Loss contingency accrual roll forward
Wildfire-related claims, current	$ 173.0		$ 173.0		$ 131.0
Wildfire-related claims, non-current	1,962.0		1,962.0		1,733.0
2017/2018 Wildfire/Mudslide Events
Loss contingency accrual roll forward
Beginning balance			1,734.0
Increase in accrued estimated losses	880.0	$ 1,265.0	1,296.0	$ 1,265.0
Amounts paid			(1,583.0)
Ending balance	1,447.0		1,447.0		1,734.0
Wildfire-related claims, current	62.0		62.0
Wildfire-related claims, non-current	1,210.0		1,210.0		1,603.0
2017/2018 Wildfire/Mudslide Events | SED Settlement
Loss contingency accrual roll forward
Wildfire-related claims, current	111.0		111.0
Wildfire-related claims, non-current	64.0		64.0
Other Wildfire Related Claims
Loss contingency accrual roll forward
Wildfire-related claims, non-current	688.0		688.0		130.0
Post-2018 Wildfires
Loss contingency accrual roll forward
Beginning balance			123.0
Increase in accrued estimated losses	415.0	5.0	565.0	7.0
Amounts paid			(5.0)
Ending balance	683.0		683.0		123.0
SCE
Loss contingency accrual roll forward
Wildfire-related claims, current	173.0		173.0		131.0
Wildfire-related claims, non-current	1,962.0		1,962.0		$ 1,733.0
SCE | Post-2018 Wildfires
Loss contingency accrual roll forward
Increase in accrued estimated losses	$ 415.0	$ 5.0	$ 565.0	$ 7.0