Commitments and Contingencies - PAC - Contingency Accruals (Details) - Wildfires - PAC - USD ($) $ in Millions	1 Months Ended	3 Months Ended	12 Months Ended			24 Months Ended
	Dec. 31, 2023	Dec. 31, 2023	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2023
Loss Contingency - Liabilities
Beginning balance			$ 424	$ 252	$ 252	$ 252
Accrued losses		$ 1,930	1,930	225	0
Payments			(631)	(53)	0	(684)
Ending balance	$ 1,723	1,723	1,723	424	252	1,723
Loss Contingency - Receivables
Beginning balance			246	116	116	116
Accruals			253	161	0
Payments received			0	31	0
Ending balance	499	$ 499	$ 499	$ 246	$ 116	$ 499
2020 Wildfires, Archie Creek Complex Fire
Loss Contingency - Liabilities
Payments	$ (549)