Commitments and Contingencies (Wildfire Insurance) (Details) - USD ($) $ in Millions	1 Months Ended				3 Months Ended	6 Months Ended		12 Months Ended
	Jul. 31, 2024	Nov. 30, 2023	Aug. 31, 2023	May 31, 2023	Mar. 31, 2024	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2023	Dec. 31, 2023	Oct. 31, 2021
Commitments and Contingencies
Requested increase (decrease) revenue requirement		$ (290.0)
SCE
Commitments and Contingencies
Wildfire insurance expense								$ 450.0
Regulatory assets						$ 12,568.0			$ 11,421.0
SCE | Customer-funded self-insurance
Commitments and Contingencies
Wildfire Insurance Coverage				$ 1,000.0
Rate funded wildfire self-insurance program				150.0
Rate funded wildfire self-insurance program future proceeds, assuming no claims				$ 300.0
Shareholder contribution on self insurance (as a percent)				2.50%
Payment of Self Insurance Cost				$ 500.0
Maximum annual shareholder contribution				$ 12.5
Self-insurance fund value	$ 1,000.0
SCE | Insurance coverage through June 2023
Commitments and Contingencies
Wildfire Insurance Coverage						1,000.0
Self insurance						100.0
Coverage net						937.0
SCE | Commercial insurance carriers
Commitments and Contingencies
Wildfire insurance expense								$ 357.0
SCE | Commercial insurance carriers | Insurance coverage through June 2023
Commitments and Contingencies
Coverage net						835.0
SCE | Edison Insurance Services-EIS | Insurance coverage through June 2023
Commitments and Contingencies
Coverage net						102.0
2017/2018 Wildfire/Mudslide Events
Commitments and Contingencies
Charge for wildfire-related claims						669.0			715.0
Increase in accrued estimated losses						490.0	$ 90.0
Expected revenue through electric rates						27.0	6.0
2017/2018 Wildfire/Mudslide Events | SCE
Commitments and Contingencies
Regulatory assets						64.0
Potential impairment						167.0
2017/2018 Wildfire/Mudslide Events | SCE | Aggregate
Commitments and Contingencies
Increase in accrued estimated losses						9,900.0
Litigation settlement						9,300.0
Insurance and other third party recoveries						2,000.0
Expected revenue through electric rates						440.0
2017/2018 Wildfire/Mudslide Events | SCE | SED Settlement
Commitments and Contingencies
Charge for wildfire-related claims						58.0				$ 550.0
Thomas and Koenigstein Fires and Montecito Mudslides-TKM | SCE
Commitments and Contingencies
Wildfire Insurance Coverage						1,000.0
Self insurance						10.0
Requested increase (decrease) revenue requirement			$ 2,400.0
Loss contingency, Uninsured claims			2,000.0
Legal and other costs			$ 400.0
CPUC cost recovery proceedings, capital recovery portion						65.0
November 2018-Woolsey | SCE
Commitments and Contingencies
Wildfire Insurance Coverage						1,000.0
Self insurance						10.0
Other Wildfires
Commitments and Contingencies
Charge for wildfire-related claims						581.0			$ 683.0
Increase in accrued estimated losses						180.0	6.0
Insurance and other third party recoveries						55.0
Expected revenue through electric rates						7.0
Other Wildfires | Edison Insurance Services-EIS
Commitments and Contingencies
Increase in accrued estimated losses					$ 1.0
Other Wildfires | SCE
Commitments and Contingencies
Charge for wildfire-related claims						581.0
Increase in accrued estimated losses						180.0	$ 6.0
Insurance and other third party recoveries						56.0
Expected revenue through electric rates						7.0
Regulatory assets						150.0
Other Wildfires | SCE | Aggregate
Commitments and Contingencies
Increase in accrued estimated losses						1,100.0
Insurance and other third party recoveries						679.0
Expected revenue through electric rates						$ 175.0