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Commitments and Contingencies - Schedule of Payments to be Made Under Settlement Agreements (Details) - USD ($) $ in Millions	Sep. 30, 2025	Dec. 31, 2024	Oct. 31, 2021
Commitments and Contingencies
Current portion of wildfire-related claims liabilities	$ 98	$ 60
Long term wildfire-related claims liabilities	456	941
Total balance at end of period	554	1,001
SCE
Commitments and Contingencies
Current portion of wildfire-related claims liabilities	98	60
Long term wildfire-related claims liabilities	456	941
Total balance at end of period		1,001
2017/2018 Wildfire/Mudslide Events
Commitments and Contingencies
Current portion of wildfire-related claims liabilities	34
Long term wildfire-related claims liabilities	184	38
Total balance at end of period	218	426
Estimate of possible loss	157	340
2017/2018 Wildfire/Mudslide Events | Settled Litigation
Commitments and Contingencies
Current portion of wildfire-related claims liabilities	14	29
2017/2018 Wildfire/Mudslide Events | SED Settlement
Commitments and Contingencies
Long term wildfire-related claims liabilities	27
2017/2018 Wildfire/Mudslide Events | SCE
Commitments and Contingencies
Current portion of wildfire-related claims liabilities		48
Long term wildfire-related claims liabilities		378
Total balance at end of period		426
2017/2018 Wildfire/Mudslide Events | SED Settlement
Commitments and Contingencies
Current portion of wildfire-related claims liabilities	20	19
2017/2018 Wildfire/Mudslide Events | SED Settlement | SCE
Commitments and Contingencies
Total balance at end of period			$ 550
Other Wildfire Events
Commitments and Contingencies
Current portion of wildfire-related claims liabilities	29
Long term wildfire-related claims liabilities	232
Total balance at end of period	261	575
Other Wildfire Events | SCE
Commitments and Contingencies
Current portion of wildfire-related claims liabilities		12
Long term wildfire-related claims liabilities		563
Total balance at end of period		575
Eaton Fire
Commitments and Contingencies
Current portion of wildfire-related claims liabilities	35
Long term wildfire-related claims liabilities	40
Total balance at end of period	75	$ 0
Eaton Fire | SCE
Commitments and Contingencies
Total balance at end of period	$ 5

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