Commitments and Contingencies (Wildfire Insurance Recovery) (Details) $ in Millions	12 Months Ended
	Dec. 31, 2021 USD ($)
2019/2020 Wildfires
Movement in Loss Contingency Receivable, Increase (Decrease) [Roll Forward]
Balance ending	$ 75
SCE
Loss Contingencies [Line Items]
Wildfire insurance coverage	1,000
Self insurance	50
SCE | 2017/2018 Wildfire/Mudslide Events
Loss Contingencies [Line Items]
Wildfire insurance coverage	1,000
Self insurance	10
Movement in Loss Contingency Receivable, Increase (Decrease) [Roll Forward]
Balance beginning	708
Insurance recoveries	(708)
SCE | November 2018 Wildfires
Loss Contingencies [Line Items]
Wildfire insurance coverage	1,000
Self insurance	$ 10