Commitments and Contingencies - Settlements Paid (Details) - USD ($) $ in Millions	12 Months Ended			66 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2024
Other Commitments [Line Items]
Total	$ 1,140	$ 1,224	$ 1,924	$ 10,018
2017/2018 Wildfire/Mudslide Events
Other Commitments [Line Items]
Total	779	1,034	1,911	9,454
Other Wildfire Events
Other Commitments [Line Items]
Total	$ 361	$ 190	$ 13	$ 564