Variable Interest Entities (Trusts) (Details) - SCE - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Trust Securities [Member]
Variable Interest Entity [Line Items]
Liquidation value (in dollars per share)			$ 2,500
5.10% Series G Preferred Stock
Variable Interest Entity [Line Items]
Security dividend rate, (as a percent)	5.10%
5.75% Series H Preferred Stock
Variable Interest Entity [Line Items]
Security dividend rate, (as a percent)	5.75%
5.375% Series J Preferred Stock
Variable Interest Entity [Line Items]
Security dividend rate, (as a percent)	5.375%
5.45% Series K Preferred Stock
Variable Interest Entity [Line Items]
Security dividend rate, (as a percent)	5.45%
5.00% Series L Preferred Stock
Variable Interest Entity [Line Items]
Security dividend rate, (as a percent)	5.00%
Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Liquidation value (in dollars per share)			$ 25
Common stock	$ 10,000	$ 10,000	$ 10,000
Power Purchase Agreement
Variable Interest Entity [Line Items]
Amounts paid to VIEs	608,000,000	673,000,000
Trust II
Variable Interest Entity [Line Items]
Liquidation preference							$ 400,000,000
Trust II | Trust Securities [Member]
Variable Interest Entity [Line Items]
Liquidation preference	220,000,000	220,000,000
Trust II | 5.10% Series G Preferred Stock
Variable Interest Entity [Line Items]
Security dividend rate, (as a percent)							5.10%
Liquidation preference	220,000,000	220,000,000					$ 400,000,000
Trust III
Variable Interest Entity [Line Items]
Liquidation preference						$ 275,000,000
Trust III | Trust Securities [Member]
Variable Interest Entity [Line Items]
Liquidation preference	275,000,000	275,000,000
Trust III | 5.75% Series H Preferred Stock
Variable Interest Entity [Line Items]
Security dividend rate, (as a percent)						5.75%
Liquidation preference	275,000,000	275,000,000				$ 275,000,000
Trust IV
Variable Interest Entity [Line Items]
Liquidation preference					$ 325,000,000
Trust IV | Trust Securities [Member]
Variable Interest Entity [Line Items]
Liquidation preference	325,000,000	325,000,000
Trust IV | 5.375% Series J Preferred Stock
Variable Interest Entity [Line Items]
Security dividend rate, (as a percent)					5.375%
Liquidation preference	325,000,000	325,000,000			$ 325,000,000
Trust V
Variable Interest Entity [Line Items]
Liquidation preference				$ 300,000,000
Trust V | Trust Securities [Member]
Variable Interest Entity [Line Items]
Liquidation preference	300,000,000	300,000,000
Trust V | 5.45% Series K Preferred Stock
Variable Interest Entity [Line Items]
Security dividend rate, (as a percent)				5.45%
Liquidation preference	300,000,000	300,000,000		$ 300,000,000
Trust VI
Variable Interest Entity [Line Items]
Liquidation preference			$ 475,000,000
Trust VI | Trust Securities [Member]
Variable Interest Entity [Line Items]
Liquidation preference	475,000,000	475,000,000
Trust VI | 5.00% Series L Preferred Stock
Variable Interest Entity [Line Items]
Security dividend rate, (as a percent)			5.00%
Liquidation preference	$ 475,000,000	$ 475,000,000	$ 475,000,000