Commitments and Contingencies (Wildfires litigation) (Details) $ in Millions	1 Months Ended					3 Months Ended					12 Months Ended
	Oct. 31, 2021 USD ($)	Apr. 30, 2021 USD ($)	Mar. 31, 2021 USD ($)	Jan. 31, 2021 $ / claim	Oct. 31, 2020 USD ($) $ / claim	Dec. 31, 2022 USD ($)	Sep. 30, 2022 USD ($)	Jun. 30, 2022 USD ($)	Mar. 31, 2022 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2022 USD ($) plaintiff	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)
2017/2018 Wildfire/Mudslide Events
Commitments and Contingencies
Increase in accrued estimated losses											$ 1,296	$ 1,265
Expected revenue from FERC customers											76	67
Total pre-tax charge											1,220	1,198
Total after-tax charge											879	894
Payments											1,911
Charge for wildfire-related claims						$ 1,119					1,119	1,734
2017/2018 Wildfire/Mudslide Events | Settled Litigation
Commitments and Contingencies
Charge for wildfire-related claims						185					185
2017/2018 Wildfire/Mudslide Events | Settled Litigation | SED Settlement
Commitments and Contingencies
Charge for wildfire-related claims						120,000					120,000
2017/2018 Wildfire/Mudslide Events | Pending Litigation
Commitments and Contingencies
Charge for wildfire-related claims						934,000					934,000
2017/2018 Wildfire/Mudslide Events | Aggregate
Commitments and Contingencies
Payments											7,600
Post-2018 Wildfires
Commitments and Contingencies
Increase in accrued estimated losses											572	7
Expected revenue from FERC customers											162
Total pre-tax charge											20	7
Total after-tax charge											14	5
Payments											13
Charge for wildfire-related claims						682					682	123
SCE
Commitments and Contingencies
Regulatory Assets						10,678					10,678	9,438
SCE | 2017/2018 Wildfire/Mudslide Events
Commitments and Contingencies
Regulatory Assets						142					142
SCE | 2017/2018 Wildfire/Mudslide Events | SED Settlement
Commitments and Contingencies
Payments											$ 1,700
Third-party uninsured claims cost recovery waiver	$ 375
Fine to State	110
Shareholder-funded safety measures costs	65
SCE | 2017/2018 Wildfire/Mudslide Events | Local Public Entity Settlements
Commitments and Contingencies
Payments										$ 360
SCE | 2017/2018 Wildfire/Mudslide Events | TKM Subrogation Settlement
Commitments and Contingencies
Payments					$ 1,200
Payment agreement for each dollar of claim | $ / claim					0.555
SCE | 2017/2018 Wildfire/Mudslide Events | Individual Plaintiff Settlements
Commitments and Contingencies
Payments						280	$ 350	$ 400	$ 700			1,700	$ 300
Number of plaintiffs | plaintiff											9,500
SCE | 2017/2018 Wildfire/Mudslide Events | Settled Litigation | SED Settlement
Commitments and Contingencies
Charge for wildfire-related claims	$ 550
SCE | 2017/2018 Wildfire/Mudslide Events | Aggregate
Commitments and Contingencies
Increase in accrued estimated losses											$ 8,800
SCE | November 2018 Wildfires | Woolsey Subrogation Settlement
Commitments and Contingencies
Payments		$ 2,200	$ 2,200
Payment agreement for each dollar of claim | $ / claim				0.67
SCE | 2017/2018 Wildfire/Mudslide Events, Excluding Certain Litigation | Individual Plaintiff Settlements
Commitments and Contingencies
Payments								$ 400
SCE | Post-2018 Wildfires
Commitments and Contingencies
Increase in accrued estimated losses											572	7
Expected revenue from FERC customers											162
Total pre-tax charge											11	7
Total after-tax charge											8	$ 5
Payments											13
Charge for wildfire-related claims						682					682
Expected insurance recoveries						473					473
SCE | Post-2018 Wildfires | Wildfire expense memorandum account
Commitments and Contingencies
Expected revenue from FERC customers											(152)
SCE | Post-2018 Wildfires | FERC balancing accounts
Commitments and Contingencies
Expected revenue from FERC customers											(14)
SCE | Post-2018 Wildfires | Aggregate
Commitments and Contingencies
Expected revenue from FERC customers											166
Total after-tax charge											41
Charge for wildfire-related claims						696					696
Expected insurance recoveries						$ 473					$ 473