Commitments and Contingencies (Current Wildfire Insurance Coverage) (Details) - USD ($) $ in Millions	1 Months Ended	3 Months Ended	12 Months Ended	13 Months Ended
	Jul. 31, 2019	Mar. 31, 2020	Nov. 30, 2018	Jun. 30, 2020	Dec. 31, 2019
Loss Contingencies [Line Items]
Regulatory assets		$ 6,294			$ 6,088
Southern California Edison
Loss Contingencies [Line Items]
Wildfire-specific insurance coverage			$ 1,000
Self-insured retention		10
Regulatory assets		6,294			$ 6,088
Southern California Edison | CPUC
Loss Contingencies [Line Items]
Requested rate increase	$ 478
Southern California Edison | Wildfire insurance costs
Loss Contingencies [Line Items]
Regulatory assets		$ 375
Southern California Edison | Forecast
Loss Contingencies [Line Items]
Wildfire-specific insurance coverage				$ 1,200
Co-Insurance per wildfire occurrence				115
Self-insured retention				50
Wildfire-specific insurance coverage, net				$ 1,000