Name:	all_CommitmentsToExtendMortgageLoans
Namespace Prefix:	all_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

This element represents the fair value of commitments to extend mortgage loans, which are secured by the underlying properties and are valued based on estimates of fees charged by other institutions to make similar commitments to similar borrowers.

No definition available.

Name:	all_CommitmentsToExtendMortgageLoansFairValue
Namespace Prefix:	all_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

This element represents commitments to acquire financial interests or instruments, to allow for additional participation in certain limited partnership investments. Because the equity investments in the limited partnerships are not actively traded, it is not practical to estimate the fair value of these commitments.

No definition available.

Name:	all_CommitmentsToInvestInLimitedPartnershipInterests
Namespace Prefix:	all_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Details

Name:	all_DerivativeFinancialInstrumentsAndOffBalanceSheetFinancialInstrumentsDisclosureAbstract
Namespace Prefix:	all_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

This element represents other loan commitments to fund loans to a borrower provided there is no violation of any condition in the contract. These commitments have predetermined interest rates and fixed or varying expiration dates or other termination clauses. The fair value of these commitments is insignificant.

No definition available.

Name:	all_OtherLoanCommitments
Namespace Prefix:	all_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

This element represents conditional commitments to purchase private placement debt and equity securities at a specified future date. The fair value of these commitments generally cannot be estimated on the date the commitment is made as the terms and conditions of the underlying private placement securities are not finalized at that point of time.

No definition available.