Commitments and Contingencies (Wildfire Insurance) (Details) - USD ($) $ in Millions	1 Months Ended	3 Months Ended	12 Months Ended
	Aug. 31, 2021	Sep. 30, 2022	Jun. 30, 2023	Dec. 31, 2022	Jun. 30, 2022	Dec. 31, 2021	Jul. 31, 2019
Edison Insurance Services-EIS
Commitments and Contingencies
Wildfire insurance expense		$ 9
SCE
Commitments and Contingencies
Wildfire insurance coverage			$ 1,000		$ 1,000
Self insurance			100		100
Coverage net			937
Co-insurance					63
Potential impairment				$ 177		$ 186
Regulatory assets				10,678		9,438
Wildfire insurance expense			450		437
SCE | Commercial insurance carriers
Commitments and Contingencies
Coverage net			835		875
Wildfire insurance expense			357		413
SCE | Edison Insurance Services-EIS
Commitments and Contingencies
Coverage net			$ 102		$ 28
2017/2018 Wildfire/Mudslide Events
Commitments and Contingencies
Increase in accrued estimated losses				1,296		$ 1,265
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				177
Expected FERC cumulative recoveries				376
Regulatory assets				142
2017/2018 Wildfire/Mudslide Events | SCE | Aggregate
Commitments and Contingencies
Increase in accrued estimated losses				8,800
Litigation settlement				7,800
Insurance recoveries				2,000
2017/2018 Wildfire/Mudslide Events | SCE | SED Settlement | Aggregate
Commitments and Contingencies
Litigation settlement				120
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