Variable Interest Entities (Trusts) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Trust VII | Trust Securities [Member]
Variable Interest Entity
Investments	$ 550,000,000
SCE | Trust Securities [Member]
Variable Interest Entity
Liquidation value (in dollars per share)			$ 2,500
SCE | 5.10% Series G Preferred Stock
Variable Interest Entity
Security dividend rate, (as a percent)	5.10%	5.10%
SCE | 5.75% Series H Preferred Stock
Variable Interest Entity
Security dividend rate, (as a percent)	5.75%	5.75%
SCE | 5.375% Series J Preferred Stock
Variable Interest Entity
Security dividend rate, (as a percent)	5.375%	5.375%
SCE | 5.45% Series K Preferred Stock
Variable Interest Entity
Security dividend rate, (as a percent)	5.45%	5.45%
SCE | 5.00% Series L Preferred Stock
Variable Interest Entity
Security dividend rate, (as a percent)	5.00%	5.00%
SCE | 7.50% Series M Preferred Stock
Variable Interest Entity
Security dividend rate, (as a percent)	7.50%	7.50%
SCE | Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity
Liquidation value (in dollars per share)			$ 25
Common stock	$ 10,000	$ 10,000	$ 10,000
SCE | Power Purchase Agreement
Variable Interest Entity
Amounts paid to VIEs	528,000,000	608,000,000
SCE | Trust II
Variable Interest Entity
Liquidation preference							$ 400,000,000
SCE | Trust II | Trust Securities [Member]
Variable Interest Entity
Investments	220,000,000	220,000,000
SCE | Trust II | 5.10% Series G Preferred Stock
Variable Interest Entity
Security dividend rate, (as a percent)							5.10%
Liquidation preference							$ 400,000,000
Investments	220,000,000	220,000,000
SCE | Trust III
Variable Interest Entity
Liquidation preference						$ 275,000,000
SCE | Trust III | Trust Securities [Member]
Variable Interest Entity
Investments	275,000,000	275,000,000
SCE | Trust III | 5.75% Series H Preferred Stock
Variable Interest Entity
Security dividend rate, (as a percent)						5.75%
Liquidation preference						$ 275,000,000
Investments	275,000,000	275,000,000
SCE | Trust IV
Variable Interest Entity
Liquidation preference					$ 325,000,000
SCE | Trust IV | Trust Securities [Member]
Variable Interest Entity
Investments	325,000,000	325,000,000
SCE | Trust IV | 5.375% Series J Preferred Stock
Variable Interest Entity
Security dividend rate, (as a percent)					5.375%
Liquidation preference					$ 325,000,000
Investments	325,000,000	325,000,000
SCE | Trust V
Variable Interest Entity
Liquidation preference				$ 300,000,000
SCE | Trust V | Trust Securities [Member]
Variable Interest Entity
Investments	300,000,000	300,000,000
SCE | Trust V | 5.45% Series K Preferred Stock
Variable Interest Entity
Security dividend rate, (as a percent)				5.45%
Liquidation preference				$ 300,000,000
Investments	300,000,000	300,000,000
SCE | Trust VI
Variable Interest Entity
Liquidation preference			$ 475,000,000
SCE | Trust VI | Trust Securities [Member]
Variable Interest Entity
Investments	475,000,000	475,000,000
SCE | Trust VI | 5.00% Series L Preferred Stock
Variable Interest Entity
Security dividend rate, (as a percent)			5.00%
Liquidation preference			$ 475,000,000
Investments	475,000,000	$ 475,000,000
SCE | Trust VII
Variable Interest Entity
Liquidation preference	550,000,000
Common stock	$ 10,000
SCE | Trust VII | 7.50% Series M Preferred Stock
Variable Interest Entity
Security dividend rate, (as a percent)	7.50%
Liquidation preference	$ 550,000,000
Investments	$ 550,000,000