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Commitments, Guarantees and Contingent Liabilities - Other proceedings (Narrative) (Details)	Dec. 31, 2025 claim
Holland Hewitt v. Allstate Life Insurance Company
Loss Contingencies
Number of pending claims	2

X

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Number of pending claims pertaining to a loss contingency.

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 450
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 4
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483076/450-20-50-4

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-Section 50
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483076/450-20-50-9

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