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v3.25.4

Reportable Segments - Narrative (Details) $ in Millions | 12 Months Ended
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Dec. 31, 2025 state segment | Dec. 31, 2025 state Segment | Dec. 31, 2025 USD ($) state | Dec. 31, 2024 USD ($) | Dec. 31, 2023 USD ($)
Segment Reporting Information |  |  |  |  |
Number of reportable segments | 4 | 4 |  |  |
Allstate Protection |  |  |  |  |
Segment Reporting Information |  |  |  |  |
Premium earned as percentage of consolidated revenues | 85.20% | 85.20% | 85.20% |  |
Number of states in which entity operates | state | 50 | 50 | 50 |  |
Minimum percentage of premiums to be considered as significant | 5.00% | 5.00% | 5.00% |  |
Allstate Protection | Non-US |  |  |  |  |
Segment Reporting Information |  |  |  |  |
Revenues from external customers generated outside the united states |  |  | $ 2,200 | $ 2,140 | $ 2,060
Protection Services | Non-US |  |  |  |  |
Segment Reporting Information |  |  |  |  |
Revenues from external customers generated outside the united states |  |  | $ 630 | $ 472 | $ 346

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- Definition Revenues from external customers attributed to all foreign countries in total from which the entity derives revenues. + References No definition available. + Details
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Balance Type: | credit
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- Definition This element represents the minimum percentage of premiums from a single jurisdiction to be considered as significant for the disclosure of a concentration of risk. + References No definition available. + Details
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- Definition This element represents the amount of premiums earned as a percentage of consolidated revenues. + References No definition available. + Details
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- Definition Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 47 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482785/280-10-55-47 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 54 -Subparagraph (e) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482785/280-10-55-54 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 18 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482810/280-10-50-18 + Details
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- Definition The number of states the entity operates in as of the balance sheet date. + References No definition available. + Details
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Data Type: | xbrli:integerItemType
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- Definition 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. + References No definition available. + Details
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- Details
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Namespace Prefix: |
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- Details
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- Details
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