Accumulated Other Comprehensive Loss - Edison International (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
AOCI Attributable to Parent, Net of Tax
Beginning balance	$ 17,740	$ 17,944
Pension and PBOP:
Other comprehensive income, net of tax	0	0
Ending balance	18,797	17,615
Accumulated Other Comprehensive Loss
AOCI Attributable to Parent, Net of Tax
Beginning balance	0	(9)
Pension and PBOP:
Ending balance	0	(9)
Accumulated Defined Benefit Plans Adjustment Attributable to Parent
Pension and PBOP:
Reclassified from accumulated other comprehensive loss	$ 0	$ 0