Equity (Issuances) (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Sep. 30, 2022
Class of Stock [Line Items]
Equity contribution		$ 900
Preferred stock
Class of Stock [Line Items]
Proceeds received, net of offering costs		$ 2,000
Liquidation value (in dollars per share)		$ 1,000
Redemption amount (in dollars per share)		1,000
Redemption amount following change in criteria (in dollars per share)		$ 1,020
Preferred stock | SCE
Class of Stock [Line Items]
Stock issued (in shares)	0	0
Offering expenses	$ 44	$ 44
Series A
Class of Stock [Line Items]
Stock issued (in shares)		1,250,000
Preferred stock, dividend rate, (as a percent)		5.375%
Dividend reset period		5 years
Margin rate for dividend rate reset (as a percent)		4.698%
Series B
Class of Stock [Line Items]
Stock issued (in shares)		750,000
Preferred stock, dividend rate, (as a percent)		5.00%
Dividend reset period		5 years
Margin rate for dividend rate reset (as a percent)		3.901%
Stock compensation awards
Class of Stock [Line Items]
Stock issued (in shares)	1,253,049	629,092
Proceeds received, net of offering costs	$ 57	$ 25
In lieu of dividend payment
Class of Stock [Line Items]
Stock issued (in shares)	273,642	293,031
Proceeds received, net of offering costs	$ 18	$ 17
401(K)
Class of Stock [Line Items]
Stock issued (in shares)	157,000	522,400
Proceeds received, net of offering costs	$ 10	$ 30
Optional cash investments
Class of Stock [Line Items]
Stock issued (in shares)	109,750	26,475
Proceeds received, net of offering costs	$ 7	$ 2
Employee Stock Purchase Plan
Class of Stock [Line Items]
Stock issued (in shares)	36,912
Proceeds received, net of offering costs	$ 2
At-the-market Program (ATM)
Class of Stock [Line Items]
Stock issued (in shares)	0
Aggregate sale price			$ 500