Property, Plant and Equipment (Schedule) (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Property, Plant and Equipment [Line Items]
Accumulated depreciation	$ (11,407)	$ (10,681)
Total utility property, plant and equipment	50,497	47,653
SCE
Property, Plant and Equipment [Line Items]
Distribution	30,821	28,663
Transmission	17,016	15,669
Generation	3,769	3,709
General plant and other	6,108	5,129
Accumulated depreciation	(11,407)	(10,681)
Total utility property, plant and equipment, Gross	46,307	42,489
Construction work in progress	4,067	5,033
Nuclear fuel, at amortized cost	123	131
Total utility property, plant and equipment	$ 50,497	$ 47,653