Commitments and Contingencies - Schedule of Total Recoveries Received Since Inception and Expected To Receive (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2025	Dec. 31, 2024
Commitments and Contingencies
Total	$ 5,011
Total	2,113	$ 647
2017/2018 Wildfire/Mudslide Events
Commitments and Contingencies
Total	3,781
Total	1,378	64
Other Wildfire Events
Commitments and Contingencies
Total	930
Total	435	583
Eaton Fire
Commitments and Contingencies
Total	300
Total	300
Recoveries from insurance and third parties
Commitments and Contingencies
Total	2,800
Recoveries from insurance and third parties \| 2017/2018 Wildfire/Mudslide Events
Commitments and Contingencies
Total	2,000
Recoveries from insurance and third parties \| Other Wildfire Events
Commitments and Contingencies
Total	800
Recoveries from insurance and third parties \| Eaton Fire
Commitments and Contingencies
Total	0
Customer-funded wildfire self-insurance
Commitments and Contingencies
Total	279
Customer-funded wildfire self-insurance \| 2017/2018 Wildfire/Mudslide Events
Commitments and Contingencies
Total	0
Customer-funded wildfire self-insurance \| Other Wildfire Events
Commitments and Contingencies
Total	0
Customer-funded wildfire self-insurance \| Eaton Fire
Commitments and Contingencies
Total	279
FERC recoveries
Commitments and Contingencies
Total	483
FERC recoveries \| 2017/2018 Wildfire/Mudslide Events
Commitments and Contingencies
Total	440
FERC recoveries \| Other Wildfire Events
Commitments and Contingencies
Total	22
FERC recoveries \| Eaton Fire
Commitments and Contingencies
Total	21
CPUC-RMBA recoveries
Commitments and Contingencies
Total	12
CPUC-RMBA recoveries \| 2017/2018 Wildfire/Mudslide Events
Commitments and Contingencies
Total	0
CPUC-RMBA recoveries \| Other Wildfire Events
Commitments and Contingencies
Total	12
CPUC-RMBA recoveries \| Eaton Fire
Commitments and Contingencies
Total	0
CPUC-WEMA deferral
Commitments and Contingencies
Total	1,437
CPUC-WEMA deferral \| 2017/2018 Wildfire/Mudslide Events
Commitments and Contingencies
Total	1,341
CPUC-WEMA deferral \| Other Wildfire Events
Commitments and Contingencies
Total	96
CPUC-WEMA deferral \| Eaton Fire
Commitments and Contingencies
Total	0
Short-term receivables from customer-funded wildfire self-insurance
Commitments and Contingencies
Total	279
Short-term receivables from customer-funded wildfire self-insurance \| 2017/2018 Wildfire/Mudslide Events
Commitments and Contingencies
Total	0
Short-term receivables from customer-funded wildfire self-insurance \| Other Wildfire Events
Commitments and Contingencies
Total	0
Short-term receivables from customer-funded wildfire self-insurance \| Eaton Fire
Commitments and Contingencies
Total	279
Long-term receivables from insurance and third parties
Commitments and Contingencies
Total	319	434
Long-term receivables from insurance and third parties \| 2017/2018 Wildfire/Mudslide Events
Commitments and Contingencies
Total	0	0
Long-term receivables from insurance and third parties \| Other Wildfire Events
Commitments and Contingencies
Total	319	434
Long-term receivables from insurance and third parties \| Eaton Fire
Commitments and Contingencies
Total	0
FERC related balancing accounts
Commitments and Contingencies
Total	78	73
FERC related balancing accounts \| 2017/2018 Wildfire/Mudslide Events
Commitments and Contingencies
Total	37	64
FERC related balancing accounts \| Other Wildfire Events
Commitments and Contingencies
Total	20	9
FERC related balancing accounts \| Eaton Fire
Commitments and Contingencies
Total	21
CPUC-WEMA
Commitments and Contingencies
Total	1,437	140
CPUC-WEMA \| 2017/2018 Wildfire/Mudslide Events
Commitments and Contingencies
Total	1,341	0
CPUC-WEMA \| Other Wildfire Events
Commitments and Contingencies
Total	96	$ 140
CPUC-WEMA \| Eaton Fire
Commitments and Contingencies
Total	$ 0