Commitment and Contingencies (Upstream Lighting Program) (Details) - SCE - USD ($) $ in Millions	1 Months Ended	12 Months Ended	24 Months Ended	36 Months Ended
	Jan. 31, 2021	Dec. 31, 2022	Dec. 31, 2018	Dec. 31, 2019
Upstream Lighting Program
Other Commitments [Line Items]
Incentives paid to manufacturers				$ 91.0
Upstream Lighting Program | Subsequent event
Other Commitments [Line Items]
Refund of ESPI awards	$ 92.0
Fines	140.0
Upstream Lighting Program, ESPI
Other Commitments [Line Items]
Incentives paid to manufacturers			$ 3.5
Upstream Lighting Program, ESPI | Subsequent event
Other Commitments [Line Items]
Refund of ESPI awards	$ 33.0
Upstream Lighting Program, ESPI | Forecast
Other Commitments [Line Items]
Incentives received		$ 1.3