Income Taxes (Unrecognized Tax Benefits) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Reconciliation of Unrecognized Tax Benefits
Beginning balance	$ 613	$ 679	$ 370
Tax positions taken during the current year, Increases	54	53	55
Tax positions taken during a prior year, Increases		3	274
Tax positions taken during a prior year, decreases	(21)	(118)	(20)
Settlements with taxing authorities		(4)
Ending balance	646	613	679
Unrecognized tax benefits that would impact the effective tax rate		341
SCE
Reconciliation of Unrecognized Tax Benefits
Beginning balance	340	320	282
Tax positions taken during the current year, Increases	54	53	56
Tax positions taken during a prior year, Increases		1	4
Tax positions taken during a prior year, decreases	(20)	(29)	(22)
Settlements with taxing authorities		(5)
Ending balance	$ 374	340	$ 320
Unrecognized tax benefits that would impact the effective tax rate		$ 69