Compensation and Benefit Plans (OCI) (Details) - Pension Plans - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Pension and Other Postretirement Benefits
Net loss (gain)	$ 6	$ (45)	$ (10)
Settlement charges		(4)
Amortization of net loss	(2)	(8)	(11)
Total loss (gain) recognized in other comprehensive income	4	(57)	(21)
Total recognized in expense and other comprehensive income	27	(38)	27
SCE
Pension and Other Postretirement Benefits
Net loss (gain)	6	(24)	(5)
Settlement charges		(4)
Amortization of net loss	(2)	(5)	(7)
Total loss (gain) recognized in other comprehensive income	4	(33)	(12)
Total recognized in expense and other comprehensive income	$ 22	$ (17)	$ 32