Commitments and Contingencies (Wildfire Insurance) (Details) - USD ($) $ in Millions	1 Months Ended	3 Months Ended		9 Months Ended		12 Months Ended
	Aug. 31, 2021	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2021	Jul. 31, 2019
Edison Insurance Services-EIS
Commitments and Contingencies
Wildfire insurance expense		$ 9		$ 9
SCE
Commitments and Contingencies
Wildfire insurance coverage						$ 1,000	$ 1,000
Self insurance						100	100
Coverage net						937
Co-insurance							63
Regulatory assets		9,530		9,530				$ 9,438
Wildfire insurance expense						450	437
SCE | Commercial insurance carriers
Commitments and Contingencies
Coverage net						102	875
Wildfire insurance expense						357	413
SCE | Edison Insurance Services-EIS
Commitments and Contingencies
Coverage net						$ 835	$ 28
2017/2018 Wildfire/Mudslide Events
Commitments and Contingencies
Increase in accrued estimated losses		880	$ 1,265	1,296	$ 1,265
Regulatory assets		163		163
2017/2018 Wildfire/Mudslide Events | SCE
Commitments and Contingencies
Wildfire insurance coverage				1,000
Self insurance				10
Restoration capital expenditures									$ 60
Denied rate increase	$ 8
Potential impairment				180
Expected FERC cumulative recoveries		376		376
Regulatory assets		$ 163		163
2017/2018 Wildfire/Mudslide Events | SCE | Aggregate
Commitments and Contingencies
Increase in accrued estimated losses				8,800
Litigation settlement				7,600
Insurance recoveries				2,000
2017/2018 Wildfire/Mudslide Events | SCE | SED Settlement | Aggregate
Commitments and Contingencies
Litigation settlement				175
November 2018 Wildfires | SCE
Commitments and Contingencies
Wildfire insurance coverage				1,000
Self insurance				$ 10
Thomas and Rye wildfires | SCE
Commitments and Contingencies
Denied rate increase	$ 6