Commitments and Contingencies (Monetary) (Details) $ in Millions		1 Months Ended						3 Months Ended				9 Months Ended		12 Months Ended
	Oct. 22, 2024 plaintiff	Oct. 31, 2024 USD ($)	Aug. 31, 2024 USD ($)	Oct. 31, 2021 USD ($)	Apr. 30, 2021 USD ($)	Mar. 31, 2021 USD ($)	Oct. 31, 2020 USD ($) $ / claim	Sep. 30, 2024 USD ($)	Jun. 30, 2024 USD ($)	Mar. 31, 2024 USD ($)	Sep. 30, 2023 USD ($)	Sep. 30, 2024 USD ($)	Sep. 30, 2023 USD ($)	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($) $ / claim	Dec. 31, 2019 USD ($)
2017/2018 Wildfire/Mudslide Events
Commitments and Contingencies
Payments												$ 636
Charge for wildfire-related claims								$ 569				569		$ 715
Expected revenue through electric rates											$ 27	27	$ 33
Increase in accrued estimated losses											475	490	565
Total pre-tax charge											448	463	532
Total after-tax charge											323	333	384
2017/2018 Wildfire/Mudslide Events | Remaining Alleged and Potential Claims
Commitments and Contingencies
Number of plaintiffs | plaintiff	440
Other Wildfires
Commitments and Contingencies
Payments												342
Charge for wildfire-related claims								525				525		683
Insurance and other third party recoveries								3			111	58	111
Expected revenue through electric rates												7
Increase in accrued estimated losses								4			118	184	124
Total pre-tax charge								1			7	119	13
Total after-tax charge								1			5	86	9
SCE
Commitments and Contingencies
Regulatory assets								10,828				10,828		11,421
SCE | Woolsey Agreement
Commitments and Contingencies
Payments		$ 4,400
Wildfire costs recovery requested		5,400
Legal and other costs		$ 1,000
CPUC cost recovery								84				84
SCE | 2017/2018 Wildfire/Mudslide Events
Commitments and Contingencies
Regulatory assets								64				64
SCE | 2017/2018 Wildfire/Mudslide Events | SED Settlement
Commitments and Contingencies
Charge for wildfire-related claims				$ 550				58				58
Fine to state				110
Shareholder-funded safety measures costs				65
SCE | 2017/2018 Wildfire/Mudslide Events | Individual Plaintiff Settlements
Commitments and Contingencies
Payments								107	$ 180	$ 216				$ 876	$ 1,700	$ 1,700
SCE | 2017/2018 Wildfire/Mudslide Events | Local Public Entity Settlements
Commitments and Contingencies
Payments																	$ 360
SCE | 2017/2018 Wildfire/Mudslide Events | TKM Agreement
Commitments and Contingencies
Payments							$ 1,200
Payment agreement (in dollars per claim) | $ / claim							0.555
SCE | 2017/2018 Wildfire/Mudslide Events | Settled Litigation
Commitments and Contingencies
Charge for wildfire-related claims								78				78
SCE | 2017/2018 Wildfire/Mudslide Events | Settled Litigation | SED Settlement
Commitments and Contingencies
Charge for wildfire-related claims								58				58
SCE | 2017/2018 Wildfire/Mudslide Events | Remaining Alleged and Potential Claims
Commitments and Contingencies
Charge for wildfire-related claims								491				491
SCE | 2017/2018 Wildfire/Mudslide Events | Aggregate
Commitments and Contingencies
Payments												9,300
Litigation settlement												9,400
Insurance and other third party recoveries												2,000
Expected revenue through electric rates												440
Potential impairment												145
Potential impairment, net of depreciation												120
Increase in accrued estimated losses												9,900
SCE | 2017/2018 Wildfire/Mudslide Events | Aggregate | Individual Plaintiff Settlements
Commitments and Contingencies
Number of plaintiffs | plaintiff	13,000
SCE | Thomas and Koenigstein Fires and Montecito Mudslides-TKM
Commitments and Contingencies
Payments			$ 1,300
Wildfire costs recovery requested			$ 1,600
Recovery costs prior to date (as a percent)			60.00%
Recovery costs after date (as a percent)			60.00%
Uninsured claims and other costs			$ 2,700
Legal and other costs			$ 300
Incremental restoration costs related to wildfires								65				65
CPUC cost recovery								55				55
SCE | Thomas and Koenigstein Fires and Montecito Mudslides-TKM | SED Settlement
Commitments and Contingencies
CPUC cost recovery amount waived				125
SCE | Thomas and Koenigstein Fires and Montecito Mudslides-TKM | Individual Plaintiff Settlements
Commitments and Contingencies
Outstanding individual plaintiff claims (as a percent)	95.00%
SCE | November 2018-Woolsey | SED Settlement
Commitments and Contingencies
CPUC cost recovery amount waived				$ 250
SCE | November 2018-Woolsey | Individual Plaintiff Settlements
Commitments and Contingencies
Outstanding individual plaintiff claims (as a percent)	94.00%
SCE | November 2018-Woolsey | Woolsey Agreement
Commitments and Contingencies
Payments					$ 2,200	$ 2,200
Payment agreement (in dollars per claim) | $ / claim																0.67
SCE | Other Wildfires
Commitments and Contingencies
Regulatory assets								148				148
Insurance and other third party recoveries								4			114	60	114
Expected revenue through electric rates												7
Increase in accrued estimated losses								4			118	184	124
Total pre-tax charge											4	117	10
Total after-tax charge											$ 3	84	$ 7
Expected insurance recovery asset								399				399
SCE | Other Wildfires | Remaining Alleged and Potential Claims
Commitments and Contingencies
Charge for wildfire-related claims								$ 521				521
SCE | Other Wildfires | Aggregate
Commitments and Contingencies
Payments												549
Insurance and other third party recoveries												683
Expected revenue through electric rates												175
Increase in accrued estimated losses												1,100
Total after-tax charge												152
SCE | Other Wildfires | Aggregate | CPUC
Commitments and Contingencies
Expected revenue through electric rates												152
SCE | Other Wildfires | Aggregate | FERC
Commitments and Contingencies
Expected revenue through electric rates												23
SCE | 2017 Creek Fire | Aggregate
Commitments and Contingencies
Insurance and other third party recoveries												$ 18