Commitments and Contingencies - PAC - Contingency Accruals (Details) - Wildfires - PAC - USD ($) $ in Millions	12 Months Ended	36 Months Ended
Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2024
Loss Contingency - Liabilities
Beginning balance	$ 1,723	$ 424	$ 252	$ 252
Accrued losses	346	1,930	225
Payments	(533)	(631)	(53)	(1,217)
Ending balance	1,536	1,723	424	1,536
Loss Contingency - Receivables
Beginning balance	499	246	116	116
Accruals	0	253	161
Insurance proceeds received	401	0	31
Ending balance	$ 98	$ 499	$ 246	$ 98

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

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Amount of cash outflow reducing loss contingency liability.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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-Name Accounting Standards Codification
-Section 50
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-URI https://asc.fasb.org/1943274/2147483076/450-20-50-1

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Amount charged against operating income increasing loss contingency liability, after adjustments to reduce previously estimated charges.

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Amount of receivable related to a loss contingency accrual. For example, an insurance recovery receivable.

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Amount of cash inflow from the collection of receivables related to a loss contingency.

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 460
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482425/460-10-50-3

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 230
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
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-Publisher FASB
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Amount of additions to receivables pertaining to a loss contingency.

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