XML 177 R130.htm IDEA: XBRL DOCUMENT v3.25.4

Reinsurance and Indemnification - Schedule of Effects of Reinsurance Ceded and Indemnification Programs on Property and Casualty Insurance Claims and Claims Expense and Accident, Health and Other Policy Benefits (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Property and casualty insurance claims and claims expense
Effects of Reinsurance [Line Items]
Reinsurance ceded amount	$ (1,348)	$ (1,716)	$ (633)
Accident, health and other policy benefits
Effects of Reinsurance [Line Items]
Reinsurance ceded amount	$ (254)	$ (36)	$ (44)

X

- Definition

Represents the amount of reinsurance ceded under various contracts.

+ References

No definition available.

+ Details

Name:	all_ReinsuranceCededAmount
Namespace Prefix:	all_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- 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

Name:	us-gaap_EffectsOfReinsuranceLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_IncomeStatementLocationAxis=all_PropertyLiabilityInsuranceClaimsAndClaimsExpenseMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_IncomeStatementLocationAxis=all_AccidentHealthAndOtherMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: