Leases (Other Information) (Details) - SCE - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
PPA Operating Leases
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$ 503	$ 580	$ 305
Operating ROU assets obtained in exchange for lease obligations	$ 226	$ 20	$ 1,084
Weighted average remaining operating lease term (in years)	13 years 4 months 13 days	9 years 5 months 1 day	8 years 1 month 28 days
Operating leases weighted average discount rate	4.30%	2.95%	2.43%
Other operating leases
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$ 55	$ 50	$ 45
Operating ROU assets obtained in exchange for lease obligations	$ 69	$ 76	$ 71
Weighted average remaining operating lease term (in years)	9 years 6 months 21 days	10 years 4 months 17 days	11 years 1 month 20 days
Operating leases weighted average discount rate	4.22%	3.78%	3.34%