Commitments and Contingencies (Wildfires) (Details)		1 Months Ended				3 Months Ended				12 Months Ended
	Feb. 15, 2024 plaintiff USD ($)	Oct. 31, 2021 USD ($)	Apr. 30, 2021 USD ($)	Mar. 31, 2021 USD ($)	Oct. 31, 2020 USD ($) $ / claim	Dec. 31, 2023 USD ($)	Sep. 30, 2023 USD ($)	Jun. 30, 2023 USD ($)	Mar. 31, 2023 USD ($)	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
Increase (decrease) in estimated loss						$ 65,000,000
Expected revenue through electric rates										$ 37,000,000	$ 76,000,000
Total after-tax charge										428,000,000	879,000,000
Payments										1,034,000,000
Charge for wildfire-related claims						715,000,000				715,000,000	1,119,000,000
Total pre-tax charge										593,000,000	1,220,000,000
Increase in accrued estimated losses										630,000,000	1,296,000,000
2017/2018 Wildfire/Mudslide Events | Individual Plaintiff Settlements
Commitments and Contingencies
Number of plaintiffs | plaintiff	1,500
Post-2018 Wildfires
Commitments and Contingencies
Expected revenue through electric rates										2,000,000	162,000,000
Total after-tax charge										25,000,000	14,000,000
Payments										190,000,000
Charge for wildfire-related claims						676,000,000				676,000,000	682,000,000
Total pre-tax charge										35,000,000	20,000,000
Increase in accrued estimated losses										184,000,000	572,000,000
SCE
Commitments and Contingencies
Regulatory Assets						11,421,000,000				11,421,000,000	10,678,000,000
SCE | 2017/2018 Wildfire/Mudslide Events
Commitments and Contingencies
Expected revenue through electric rates						4,000,000
Total after-tax charge						44,000,000
Regulatory Assets						37,000,000				37,000,000
Total pre-tax charge						61,000,000
Increase in accrued estimated losses										630,000,000
SCE | 2017/2018 Wildfire/Mudslide Events | SED Settlement
Commitments and Contingencies
Charge for wildfire-related claims		$ 550,000,000				62,000,000				62,000,000
Fine to State		110,000,000
Shareholder-funded safety measures costs		65,000,000
Third-party uninsured claims cost recovery waiver		$ 375,000,000
SCE | 2017/2018 Wildfire/Mudslide Events | Local Public Entity Settlements
Commitments and Contingencies
Payments													$ 360,000,000
SCE | 2017/2018 Wildfire/Mudslide Events | TKM Subrogation Settlement
Commitments and Contingencies
Payments					$ 1,200,000,000
Payment agreement for each dollar of claim | $ / claim					0.555
SCE | 2017/2018 Wildfire/Mudslide Events | Individual Plaintiff Settlements
Commitments and Contingencies
Payments						134,000,000	$ 316,000,000	$ 278,000,000	$ 148,000,000	876,000,000	1,700,000,000	$ 1,700,000,000
SCE | 2017/2018 Wildfire/Mudslide Events | Settled Litigation
Commitments and Contingencies
Charge for wildfire-related claims						78,000,000				78,000,000
SCE | 2017/2018 Wildfire/Mudslide Events | Settled Litigation | SED Settlement
Commitments and Contingencies
Charge for wildfire-related claims						62,000,000				62,000,000
SCE | 2017/2018 Wildfire/Mudslide Events | Estimated Losses for Remaining Alleged and Potential Claims
Commitments and Contingencies
Charge for wildfire-related claims						637,000,000				637,000,000
SCE | 2017/2018 Wildfire/Mudslide Events | Aggregate
Commitments and Contingencies
Expected revenue through electric rates										413,000,000
Payments										8,700,000,000
Increase in accrued estimated losses										9,400,000,000
SCE | November 2018 Wildfires | Woolsey Subrogation Settlement
Commitments and Contingencies
Payments			$ 2,200,000,000	$ 2,200,000,000
Payment agreement for each dollar of claim | $ / claim												0.67
SCE | 2017/2018 Wildfire/Mudslide Events, Excluding Certain Litigation | Aggregate | Individual Plaintiff Settlements
Commitments and Contingencies
Number of plaintiffs	12,000
SCE | Post-2018 Wildfires
Commitments and Contingencies
Expected revenue through electric rates										2,000,000	162,000,000
Total after-tax charge										24,000,000	8,000,000
Regulatory Assets						154,000,000				154,000,000
Total pre-tax charge										33,000,000	11,000,000
Increase in accrued estimated losses										184,000,000	$ 572,000,000
Expected insurance recoveries						$ 512,000,000				512,000,000
SCE | Post-2018 Wildfires | Aggregate
Commitments and Contingencies
Expected revenue through electric rates										168,000,000
Total after-tax charge										65,000,000
Payments										204,000,000
Increase in accrued estimated losses										880,000,000
SCE | Post-2018 Wildfires | Aggregate | CPUC
Commitments and Contingencies
Expected revenue through electric rates										152,000,000
SCE | Post-2018 Wildfires | Aggregate | FERC
Commitments and Contingencies
Expected revenue through electric rates										$ 16,000,000