Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Commitments, Guarantees and Contingent Liabilities - Other proceedings (Narrative) (Details)	Dec. 31, 2023 claim	Nov. 11, 2016 officer
The Allstate Corp. Securities Litigation
Loss Contingencies
Number of officers \| officer		2
Holland Hewitt v. Allstate Life Insurance Company
Loss Contingencies
Number of pending claims \| claim	2