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Derivative Financial Instruments - Narrative (Details) | 9 Months Ended
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Sep. 30, 2024 USD ($)
Derivative Instruments and Hedging Activities Disclosure [Abstract] |
Potential recoveries | $ 0
Contingent consideration term | 10 years

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- Definition Disposal Group, Including Discontinued Operation, Contingent Consideration, Term + References No definition available. + Details
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Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Definition Represents the potential amount of recoveries under sale of credit protection. + References No definition available. + Details
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Namespace Prefix: | all_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- References No definition available. + Details
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Balance Type: | na
Period Type: | duration