Commitments and Contingencies - PAC - Contingency Accrual (Details) - Wildfires - PAC - USD ($) $ in Millions	3 Months Ended	51 Months Ended
Mar. 31, 2026	Mar. 31, 2025	Mar. 31, 2026
Loss Contingency - Liabilities
Beginning balance	$ 1,161	$ 1,536
Payments	(584)	(114)	$ (2,276)
Ending balance	$ 577	$ 1,422	$ 577

Amount of loss contingency liability.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 450
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483076/450-20-50-1

Reference 2: http://www.xbrl.org/2003/role/recommendedDisclosureRef
-Topic 450
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 10
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483076/450-20-50-10

Name:	us-gaap_LossContingencyAccrualAtCarryingValue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant