<?xml version="1.0" encoding="utf-8"?>
<FilingSummary xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
  <Version>2.4.0.6</Version>
  <ProcessingTime />
  <ReportFormat>Html</ReportFormat>
  <ContextCount>768</ContextCount>
  <ElementCount>547</ElementCount>
  <EntityCount>1</EntityCount>
  <FootnotesReported>false</FootnotesReported>
  <SegmentCount>241</SegmentCount>
  <ScenarioCount>0</ScenarioCount>
  <TuplesReported>false</TuplesReported>
  <UnitCount>9</UnitCount>
  <MyReports>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R1.htm</HtmlFileName>
      <LongName>0000 - Document - Document and Entity Information</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.allstate.com/role/DocumentAndEntityInformation</Role>
      <ShortName>Document and Entity Information</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R2.htm</HtmlFileName>
      <LongName>0010 - Statement - CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.allstate.com/role/StatementOfIncome</Role>
      <ShortName>CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R3.htm</HtmlFileName>
      <LongName>0015 - Statement - CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (Parenthetical)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.allstate.com/role/StatementOfIncomeParenthetical</Role>
      <ShortName>CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (Parenthetical)</ShortName>
    </Report>
    <Report>
      <IsDefault>true</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R4.htm</HtmlFileName>
      <LongName>0020 - Statement - CONSOLIDATED STATEMENTS OF FINANCIAL POSITION</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.allstate.com/role/BalanceSheet</Role>
      <ShortName>CONSOLIDATED STATEMENTS OF FINANCIAL POSITION</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R5.htm</HtmlFileName>
      <LongName>0025 - Statement - CONSOLIDATED STATEMENTS OF FINANCIAL POSITION (Parenthetical)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.allstate.com/role/BalanceSheetParenthetical</Role>
      <ShortName>CONSOLIDATED STATEMENTS OF FINANCIAL POSITION (Parenthetical)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R6.htm</HtmlFileName>
      <LongName>0030 - Statement - CONSOLIDATED STATEMENTS OF SHAREHOLDER'S EQUITY</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.allstate.com/role/StatementOfStockholdersEquity</Role>
      <ShortName>CONSOLIDATED STATEMENTS OF SHAREHOLDER'S EQUITY</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R7.htm</HtmlFileName>
      <LongName>0040 - Statement - CONSOLIDATED STATEMENTS OF CASH FLOWS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.allstate.com/role/CashFlows</Role>
      <ShortName>CONSOLIDATED STATEMENTS OF CASH FLOWS</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R8.htm</HtmlFileName>
      <LongName>1010 - Disclosure - General</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.allstate.com/role/DisclosureGeneral</Role>
      <ShortName>General</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R9.htm</HtmlFileName>
      <LongName>1020 - Disclosure - Summary of Significant Accounting Policies</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.allstate.com/role/DisclosureSummaryOfSignificantAccountingPolicies</Role>
      <ShortName>Summary of Significant Accounting Policies</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R10.htm</HtmlFileName>
      <LongName>1030 - Disclosure - Supplemental Cash Flow Information</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.allstate.com/role/DisclosureSupplementalCashFlowInformation</Role>
      <ShortName>Supplemental Cash Flow Information</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R11.htm</HtmlFileName>
      <LongName>1040 - Disclosure - Related Party Transactions</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.allstate.com/role/DisclosureRelatedPartyTransactions</Role>
      <ShortName>Related Party Transactions</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R12.htm</HtmlFileName>
      <LongName>1050 - Disclosure - Investments</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.allstate.com/role/DisclosureInvestments</Role>
      <ShortName>Investments</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R13.htm</HtmlFileName>
      <LongName>1060 - Disclosure - Fair Value of Assets and Liabilities</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.allstate.com/role/DisclosureFairValueOfAssetsAndLiabilities</Role>
      <ShortName>Fair Value of Assets and Liabilities</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R14.htm</HtmlFileName>
      <LongName>1070 - Disclosure - Derivative Financial Instruments and Off-balance sheet Financial Instruments</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.allstate.com/role/DisclosureDerivativeFinancialInstrumentsAndOffBalanceSheetFinancialInstruments</Role>
      <ShortName>Derivative Financial Instruments and Off-balance sheet Financial Instruments</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R15.htm</HtmlFileName>
      <LongName>1080 - Disclosure - Reserve for Life-Contingent Contract Benefits and Contractholder Funds</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.allstate.com/role/DisclosureReserveforLifeContingentContractBenefitsAndContractHolderFunds</Role>
      <ShortName>Reserve for Life-Contingent Contract Benefits and Contractholder Funds</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R16.htm</HtmlFileName>
      <LongName>1090 - Disclosure - Reinsurance</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.allstate.com/role/DisclosureReinsurance</Role>
      <ShortName>Reinsurance</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R17.htm</HtmlFileName>
      <LongName>1100 - Disclosure - Deferred Policy Acquisition and Sales Inducement Costs</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.allstate.com/role/DisclosureDeferredPolicyAcquisitionAndSalesInducementCosts</Role>
      <ShortName>Deferred Policy Acquisition and Sales Inducement Costs</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R18.htm</HtmlFileName>
      <LongName>1110 - Disclosure - Guarantees and Contingent Liabilities</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.allstate.com/role/DisclosureGuaranteesAndContingentLiabilities</Role>
      <ShortName>Guarantees and Contingent Liabilities</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R19.htm</HtmlFileName>
      <LongName>1120 - Disclosure - Income Taxes</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.allstate.com/role/DisclosureIncomeTaxes</Role>
      <ShortName>Income Taxes</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R20.htm</HtmlFileName>
      <LongName>1130 - Disclosure - Capital Structure</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.allstate.com/role/DisclosureCapitalStructure</Role>
      <ShortName>Capital Structure</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R21.htm</HtmlFileName>
      <LongName>1140 - Disclosure - Statutory Financial Information and Dividend Limitations</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.allstate.com/role/DisclosureStatutoryFinancialInformationAndDividendLimitations</Role>
      <ShortName>Statutory Financial Information and Dividend Limitations</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R22.htm</HtmlFileName>
      <LongName>1150 - Disclosure - Benefit Plans</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.allstate.com/role/DisclosureBenefitPlans</Role>
      <ShortName>Benefit Plans</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R23.htm</HtmlFileName>
      <LongName>1160 - Disclosure - Other Comprehensive Income</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.allstate.com/role/DisclosureOtherComprehensiveIncome</Role>
      <ShortName>Other Comprehensive Income</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R24.htm</HtmlFileName>
      <LongName>1170 - Disclosure - Quarterly Results (unaudited)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.allstate.com/role/DisclosureQuarterlyResults</Role>
      <ShortName>Quarterly Results (unaudited)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R25.htm</HtmlFileName>
      <LongName>1180 - Disclosure - SCHEDULE I - SUMMARY OF INVESTMENTS OTHER THAN INVESTMENTS IN RELATED PARTIES</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.allstate.com/role/DisclosureSummaryOfInvestmentsOtherThanInvestmentsInRelatedParties</Role>
      <ShortName>SCHEDULE I - SUMMARY OF INVESTMENTS OTHER THAN INVESTMENTS IN RELATED PARTIES</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R26.htm</HtmlFileName>
      <LongName>1190 - Disclosure - SCHEDULE IV - REINSURANCE</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.allstate.com/role/DisclosureScheduleIVReinsurance</Role>
      <ShortName>SCHEDULE IV - REINSURANCE</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R27.htm</HtmlFileName>
      <LongName>1200 - Disclosure - SCHEDULE V - VALUATION ALLOWANCES AND QUALIFYING ACCOUNTS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.allstate.com/role/DisclosureValuationAllowancesAndQualifyingAccounts</Role>
      <ShortName>SCHEDULE V - VALUATION ALLOWANCES AND QUALIFYING ACCOUNTS</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R28.htm</HtmlFileName>
      <LongName>2020 - Disclosure - Summary of Significant Accounting Policies (Policies)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.allstate.com/role/DisclosureSummaryOfSignificantAccountingPoliciesPolicies</Role>
      <ShortName>Summary of Significant Accounting Policies (Policies)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R29.htm</HtmlFileName>
      <LongName>3010 - Disclosure - General (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.allstate.com/role/DisclosureGeneralTables</Role>
      <ShortName>General (Tables)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R30.htm</HtmlFileName>
      <LongName>3030 - Disclosure - Supplemental Cash Flow Information (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.allstate.com/role/DisclosureSupplementalCashFlowInformationTables</Role>
      <ShortName>Supplemental Cash Flow Information (Tables)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R31.htm</HtmlFileName>
      <LongName>3040 - Disclosure - Related Party Transactions (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.allstate.com/role/DisclosureRelatedPartyTransactionsTables</Role>
      <ShortName>Related Party Transactions (Tables)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R32.htm</HtmlFileName>
      <LongName>3050 - Disclosure - Investments (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.allstate.com/role/DisclosureInvestmentsTables</Role>
      <ShortName>Investments (Tables)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R33.htm</HtmlFileName>
      <LongName>3060 - Disclosure - Fair Value of Assets and Liabilities (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.allstate.com/role/DisclosureFairValueOfAssetsAndLiabilitiesTables</Role>
      <ShortName>Fair Value of Assets and Liabilities (Tables)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R34.htm</HtmlFileName>
      <LongName>3070 - Disclosure - Derivative Financial Instruments and Off-balance-sheet Financial Instruments (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.allstate.com/role/DisclosureDerivativeFinancialInstrumentsAndOffBalanceSheetFinancialInstrumentsTables</Role>
      <ShortName>Derivative Financial Instruments and Off-balance-sheet Financial Instruments (Tables)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R35.htm</HtmlFileName>
      <LongName>3080 - Disclosure - Reserve for Life-Contingent Contract Benefits and Contractholder Funds (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.allstate.com/role/DisclosureReserveforLifeContingentContractBenefitsandContractholderFundsTables</Role>
      <ShortName>Reserve for Life-Contingent Contract Benefits and Contractholder Funds (Tables)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R36.htm</HtmlFileName>
      <LongName>3090 - Disclosure - Reinsurance (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.allstate.com/role/DisclosureReinsuranceTables</Role>
      <ShortName>Reinsurance (Tables)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R37.htm</HtmlFileName>
      <LongName>3100 - Disclosure - Deferred Policy Acquisition and Sales Inducement Costs (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.allstate.com/role/DisclosureDeferredPolicyAcquisitionAndSalesInducementCostsTables</Role>
      <ShortName>Deferred Policy Acquisition and Sales Inducement Costs (Tables)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R38.htm</HtmlFileName>
      <LongName>3120 - Disclosure - Income Taxes (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.allstate.com/role/DisclosureIncomeTaxesTables</Role>
      <ShortName>Income Taxes (Tables)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R39.htm</HtmlFileName>
      <LongName>3160 - Disclosure - Other Comprehensive Income (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.allstate.com/role/DisclosureOtherComprehensiveIncomeTables</Role>
      <ShortName>Other Comprehensive Income (Tables)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R40.htm</HtmlFileName>
      <LongName>3170 - Disclosure - Quarterly Results (unaudited) (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.allstate.com/role/DisclosureQuarterlyResultsTables</Role>
      <ShortName>Quarterly Results (unaudited) (Tables)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R41.htm</HtmlFileName>
      <LongName>4010 - Disclosure - General (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.allstate.com/role/DisclosureGeneralDetails</Role>
      <ShortName>General (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R42.htm</HtmlFileName>
      <LongName>4020 - Disclosure - Summary of Significant Accounting Policies (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.allstate.com/role/DisclosureSummaryOfSignificantAccountingPoliciesDetails</Role>
      <ShortName>Summary of Significant Accounting Policies (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R43.htm</HtmlFileName>
      <LongName>4021 - Disclosure - Summary of Significant Accounting Policies (Details 2)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.allstate.com/role/DisclosureSummaryOfSignificantAccountingPoliciesDetails2</Role>
      <ShortName>Summary of Significant Accounting Policies (Details 2)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R44.htm</HtmlFileName>
      <LongName>4030 - Disclosure - Supplemental Cash Flow Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.allstate.com/role/DisclosureSupplementalCashFlowInformationDetails</Role>
      <ShortName>Supplemental Cash Flow Information (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R45.htm</HtmlFileName>
      <LongName>4040 - Disclosure - Related Party Transactions (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.allstate.com/role/DisclosureRelatedPartyTransactionsDetails</Role>
      <ShortName>Related Party Transactions (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R46.htm</HtmlFileName>
      <LongName>4041 - Disclosure - Related Party Transactions (Details 2)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.allstate.com/role/DisclosureRelatedPartyTransactionsDetails2</Role>
      <ShortName>Related Party Transactions (Details 2)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R47.htm</HtmlFileName>
      <LongName>4042 - Disclosure - Related Party Transactions (Details 3)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.allstate.com/role/DisclosureRelatedPartyTransactionsDetails3</Role>
      <ShortName>Related Party Transactions (Details 3)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R48.htm</HtmlFileName>
      <LongName>4050 - Disclosure - Investments (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.allstate.com/role/DisclosureInvestmentsDetails</Role>
      <ShortName>Investments (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R49.htm</HtmlFileName>
      <LongName>4051 - Disclosure - Investments (Details 2)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.allstate.com/role/DisclosureInvestmentsDetails2</Role>
      <ShortName>Investments (Details 2)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R50.htm</HtmlFileName>
      <LongName>4052 - Disclosure - Investments (Details 3)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.allstate.com/role/DisclosureInvestmentsDetails3</Role>
      <ShortName>Investments (Details 3)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R51.htm</HtmlFileName>
      <LongName>4053 - Disclosure - Investments (Details 4)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.allstate.com/role/DisclosureInvestmentsDetails4</Role>
      <ShortName>Investments (Details 4)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R52.htm</HtmlFileName>
      <LongName>4054 - Disclosure - Investments (Details 5)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.allstate.com/role/DisclosureInvestmentsDetails5</Role>
      <ShortName>Investments (Details 5)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R53.htm</HtmlFileName>
      <LongName>4055 - Disclosure - Investments (Details 6)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.allstate.com/role/DisclosureInvestmentsDetails6</Role>
      <ShortName>Investments (Details 6)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R54.htm</HtmlFileName>
      <LongName>4056 - Disclosure - Investments (Details 7)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.allstate.com/role/DisclosureInvestmentsDetails7</Role>
      <ShortName>Investments (Details 7)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R55.htm</HtmlFileName>
      <LongName>4057 - Disclosure - Investments (Details 8)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.allstate.com/role/DisclosureInvestmentsDetails8</Role>
      <ShortName>Investments (Details 8)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R56.htm</HtmlFileName>
      <LongName>4058 - Disclosure - Investments (Details 9)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.allstate.com/role/DisclosureInvestmentsDetails9</Role>
      <ShortName>Investments (Details 9)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R57.htm</HtmlFileName>
      <LongName>4059 - Disclosure - Investments (Details 10)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.allstate.com/role/DisclosureInvestmentsDetails10</Role>
      <ShortName>Investments (Details 10)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R58.htm</HtmlFileName>
      <LongName>4060 - Disclosure - Investments (Details 11)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.allstate.com/role/DisclosureInvestmentsDetails11Calc2</Role>
      <ShortName>Investments (Details 11)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R59.htm</HtmlFileName>
      <LongName>4061 - Disclosure - Investments (Details 12)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.allstate.com/role/DisclosureInvestmentsDetails12</Role>
      <ShortName>Investments (Details 12)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R60.htm</HtmlFileName>
      <LongName>4062 - Disclosure - Investments (Details 13)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.allstate.com/role/DisclosureInvestmentsDetails13</Role>
      <ShortName>Investments (Details 13)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R61.htm</HtmlFileName>
      <LongName>4063 - Disclosure - Investments (Details 14)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.allstate.com/role/DisclosureInvestmentsDetails14</Role>
      <ShortName>Investments (Details 14)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R62.htm</HtmlFileName>
      <LongName>4064 - Disclosure - Fair Value of Assets and Liabilities (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.allstate.com/role/DisclosureFairValueOfAssetsAndLiabilitiesDetails</Role>
      <ShortName>Fair Value of Assets and Liabilities (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R63.htm</HtmlFileName>
      <LongName>4065 - Disclosure - Fair Value of Assets and Liabilities (Details 2)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.allstate.com/role/DisclosureFairValueOfAssetsAndLiabilitiesDetails2</Role>
      <ShortName>Fair Value of Assets and Liabilities (Details 2)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R64.htm</HtmlFileName>
      <LongName>4066 - Disclosure - Fair Value of Assets and Liabilities (Details 3)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.allstate.com/role/DisclosureFairValueOfAssetsAndLiabilitiesDetails3</Role>
      <ShortName>Fair Value of Assets and Liabilities (Details 3)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R65.htm</HtmlFileName>
      <LongName>4067 - Disclosure - Fair Value of Assets and Liabilities (Details 4)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.allstate.com/role/DisclosureFairValueOfAssetsAndLiabilitiesDetails4</Role>
      <ShortName>Fair Value of Assets and Liabilities (Details 4)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R66.htm</HtmlFileName>
      <LongName>4068 - Disclosure - Fair Value of Assets and Liabilities (Details 5)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.allstate.com/role/DisclosureFairValueOfAssetsAndLiabilitiesDetails5</Role>
      <ShortName>Fair Value of Assets and Liabilities (Details 5)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R67.htm</HtmlFileName>
      <LongName>4069 - Disclosure - Fair Value of Assets and Liabilities (Details 6)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.allstate.com/role/DisclosureFairValueOfAssetsAndLiabilitiesDetails6</Role>
      <ShortName>Fair Value of Assets and Liabilities (Details 6)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R68.htm</HtmlFileName>
      <LongName>4070 - Disclosure - Derivative Financial Instruments and Off-balance sheet Financial Instruments (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.allstate.com/role/DisclosureDerivativeFinancialInstrumentsAndOffBalanceSheetFinancialInstrumentsDetails</Role>
      <ShortName>Derivative Financial Instruments and Off-balance sheet Financial Instruments (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R69.htm</HtmlFileName>
      <LongName>4071 - Disclosure - Derivative Financial Instruments and Off-balance sheet Financial Instruments (Details 2)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.allstate.com/role/DisclosureDerivativeFinancialInstrumentsAndOffBalanceSheetFinancialInstrumentsDetails2</Role>
      <ShortName>Derivative Financial Instruments and Off-balance sheet Financial Instruments (Details 2)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R70.htm</HtmlFileName>
      <LongName>4072 - Disclosure - Derivative Financial Instruments and Off-balance sheet Financial Instruments (Details 3)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.allstate.com/role/DisclosureDerivativeFinancialInstrumentsAndOffBalanceSheetFinancialInstrumentsDetails3</Role>
      <ShortName>Derivative Financial Instruments and Off-balance sheet Financial Instruments (Details 3)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R71.htm</HtmlFileName>
      <LongName>4073 - Disclosure - Derivative Financial Instruments and Off-balance sheet Financial Instruments (Details 4)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.allstate.com/role/DisclosureDerivativeFinancialInstrumentsAndOffBalanceSheetFinancialInstrumentsDetails4</Role>
      <ShortName>Derivative Financial Instruments and Off-balance sheet Financial Instruments (Details 4)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R72.htm</HtmlFileName>
      <LongName>4074 - Disclosure - Derivative Financial Instruments and Off-balance sheet Financial Instruments (Details 5)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.allstate.com/role/DisclosureDerivativeFinancialInstrumentsAndOffBalanceSheetFinancialInstrumentsDetails5</Role>
      <ShortName>Derivative Financial Instruments and Off-balance sheet Financial Instruments (Details 5)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R73.htm</HtmlFileName>
      <LongName>4075 - Disclosure - Derivative Financial Instruments and Off-balance sheet Financial Instruments (Details 6)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.allstate.com/role/DisclosureDerivativeFinancialInstrumentsAndOffBalanceSheetFinancialInstrumentsDetails6</Role>
      <ShortName>Derivative Financial Instruments and Off-balance sheet Financial Instruments (Details 6)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R74.htm</HtmlFileName>
      <LongName>4080 - Disclosure - Reserve for Life-Contingent Contract Benefits and Contractholder Funds (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.allstate.com/role/DisclosureReserveforLifeContingentContractBenefitsandContractholderFundsDetails</Role>
      <ShortName>Reserve for Life-Contingent Contract Benefits and Contractholder Funds (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R75.htm</HtmlFileName>
      <LongName>4081 - Disclosure - Reserve for Life-Contingent Contract Benefits and Contractholder Funds (Details 2)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.allstate.com/role/DisclosureReserveforLifeContingentContractBenefitsandContractholderFundsDetails2</Role>
      <ShortName>Reserve for Life-Contingent Contract Benefits and Contractholder Funds (Details 2)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R76.htm</HtmlFileName>
      <LongName>4082 - Disclosure - Reserve for Life-Contingent Contract Benefits and Contractholder Funds (Details 3)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.allstate.com/role/DisclosureReserveforLifeContingentContractBenefitsandContractholderFundsDetails3</Role>
      <ShortName>Reserve for Life-Contingent Contract Benefits and Contractholder Funds (Details 3)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R77.htm</HtmlFileName>
      <LongName>4083 - Disclosure - Reserve for Life-Contingent Contract Benefits and Contractholder Funds (Details 4)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.allstate.com/role/DisclosureReserveforLifeContingentContractBenefitsandContractholderFundsDetails4</Role>
      <ShortName>Reserve for Life-Contingent Contract Benefits and Contractholder Funds (Details 4)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R78.htm</HtmlFileName>
      <LongName>4084 - Disclosure - Reserve for Life-Contingent Contract Benefits and Contractholder Funds (Details 5)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.allstate.com/role/DisclosureReserveforLifeContingentContractBenefitsandContractholderFundsDetails5</Role>
      <ShortName>Reserve for Life-Contingent Contract Benefits and Contractholder Funds (Details 5)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R79.htm</HtmlFileName>
      <LongName>4085 - Disclosure - Reserve for Life-Contingent Contract Benefits and Contractholder Funds (Details 6)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.allstate.com/role/DisclosureReserveforLifeContingentContractBenefitsandContractholderFundsDetails6</Role>
      <ShortName>Reserve for Life-Contingent Contract Benefits and Contractholder Funds (Details 6)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R80.htm</HtmlFileName>
      <LongName>4090 - Disclosure - Reinsurance (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.allstate.com/role/DisclosureReinsuranceDetails</Role>
      <ShortName>Reinsurance (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R81.htm</HtmlFileName>
      <LongName>4091 - Disclosure - Reinsurance (Details 2)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.allstate.com/role/DisclosureReinsuranceDetails2</Role>
      <ShortName>Reinsurance (Details 2)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R82.htm</HtmlFileName>
      <LongName>4100 - Disclosure - Deferred Policy Acquisition and Sales Inducement Costs (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.allstate.com/role/DisclosureDeferredPolicyAcquisitionAndSalesInducementCostsDetails</Role>
      <ShortName>Deferred Policy Acquisition and Sales Inducement Costs (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R83.htm</HtmlFileName>
      <LongName>4110 - Disclosure - Guarantees and Contingent Liabilities (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.allstate.com/role/DisclosureGuaranteesAndContingentLiabilitiesDetails</Role>
      <ShortName>Guarantees and Contingent Liabilities (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R84.htm</HtmlFileName>
      <LongName>4111 - Disclosure - Guarantees and Contingent Liabilities (Details 2)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.allstate.com/role/DisclosureGuaranteesAndContingentLiabilitiesDetails2</Role>
      <ShortName>Guarantees and Contingent Liabilities (Details 2)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R85.htm</HtmlFileName>
      <LongName>4120 - Disclosure - Income Taxes (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.allstate.com/role/DisclosureIncomeTaxesDetails</Role>
      <ShortName>Income Taxes (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R86.htm</HtmlFileName>
      <LongName>4130 - Disclosure - Capital Structure (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.allstate.com/role/DisclosureCapitalStructureDetails</Role>
      <ShortName>Capital Structure (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R87.htm</HtmlFileName>
      <LongName>4140 - Disclosure - Statutory Financial Information and Dividend Limitations (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.allstate.com/role/DisclosureStatutoryFinancialInformationAndDividendLimitationsDetails</Role>
      <ShortName>Statutory Financial Information and Dividend Limitations (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R88.htm</HtmlFileName>
      <LongName>4150 - Disclosure - Benefit Plans (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.allstate.com/role/DisclosureBenefitPlansDetails</Role>
      <ShortName>Benefit Plans (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R89.htm</HtmlFileName>
      <LongName>4160 - Disclosure - Other Comprehensive Income (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.allstate.com/role/DisclosureOtherComprehensiveIncomeDetails</Role>
      <ShortName>Other Comprehensive Income (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R90.htm</HtmlFileName>
      <LongName>4170 - Disclosure - Quarterly Results (unaudited) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.allstate.com/role/DisclosureQuarterlyResultsDetails</Role>
      <ShortName>Quarterly Results (unaudited) (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R91.htm</HtmlFileName>
      <LongName>4180 - Disclosure - SCHEDULE I - SUMMARY OF INVESTMENTS OTHER THAN INVESTMENTS IN RELATED PARTIES (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.allstate.com/role/DisclosureSummaryOfInvestmentsOtherThanInvestmentsInRelatedPartiesDetails</Role>
      <ShortName>SCHEDULE I - SUMMARY OF INVESTMENTS OTHER THAN INVESTMENTS IN RELATED PARTIES (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R92.htm</HtmlFileName>
      <LongName>4190 - Disclosure - SCHEDULE IV - REINSURANCE (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.allstate.com/role/DisclosureScheduleIVReinsuranceDetails</Role>
      <ShortName>SCHEDULE IV - REINSURANCE (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R93.htm</HtmlFileName>
      <LongName>4200 - Disclosure - SCHEDULE V - VALUATION ALLOWANCES AND QUALIFYING ACCOUNTS (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.allstate.com/role/DisclosureValuationAllowancesAndQualifyingAccountsDetails</Role>
      <ShortName>SCHEDULE V - VALUATION ALLOWANCES AND QUALIFYING ACCOUNTS (Details)</ShortName>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <LongName>All Reports</LongName>
      <ReportType>Book</ReportType>
      <ShortName>All Reports</ShortName>
    </Report>
  </MyReports>
  <Logs>
    <Log type="Info">Element alic_FairValueInputsProjectedOptionCost had a mix of decimals attribute values: 3 4.</Log>
    <Log type="Info">Element alic_MortgageLoansOnRealEstateCarryingValuePercentage had a mix of decimals attribute values: 2 3.</Log>
    <Log type="Info">Element us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost had a mix of decimals attribute values: -6 -3.</Log>
    <Log type="Info">Element us-gaap_InterestExpenseRelatedParty had a mix of decimals attribute values: -6 -3.</Log>
    <Log type="Info">'Monetary' elements on report '4041 - Disclosure - Related Party Transactions (Details 2)' had a mix of different decimal attribute values.</Log>
    <Log type="Info">'Monetary' elements on report '4042 - Disclosure - Related Party Transactions (Details 3)' had a mix of different decimal attribute values.</Log>
    <Log type="Info">'Monetary' elements on report '4063 - Disclosure - Investments (Details 14)' had a mix of different decimal attribute values.</Log>
    <Log type="Info">'Monetary' elements on report '4075 - Disclosure - Derivative Financial Instruments and Off-balance sheet Financial Instruments (Details 6)' had a mix of different decimal attribute values.</Log>
    <Log type="Info">'Monetary' elements on report '4083 - Disclosure - Reserve for Life-Contingent Contract Benefits and Contractholder Funds (Details 4)' had a mix of different decimal attribute values.</Log>
    <Log type="Info">'Monetary' elements on report '4090 - Disclosure - Reinsurance (Details)' had a mix of different decimal attribute values.</Log>
    <Log type="Info">'Monetary' elements on report '4111 - Disclosure - Guarantees and Contingent Liabilities (Details 2)' had a mix of different decimal attribute values.</Log>
    <Log type="Info">'Monetary' elements on report '4140 - Disclosure - Statutory Financial Information and Dividend Limitations (Details)' had a mix of different decimal attribute values.</Log>
    <Log type="Info">'Monetary' elements on report '4150 - Disclosure - Benefit Plans (Details)' had a mix of different decimal attribute values.</Log>
    <Log type="Info">Process Flow-Through: 0010 - Statement - CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME</Log>
    <Log type="Info">	Process Flow-Through: Removing column '3 Months Ended
Dec. 31, 2012'</Log>
    <Log type="Info">	Process Flow-Through: Removing column '3 Months Ended
Sep. 30, 2012'</Log>
    <Log type="Info">	Process Flow-Through: Removing column '3 Months Ended
Jun. 30, 2012'</Log>
    <Log type="Info">	Process Flow-Through: Removing column '3 Months Ended
Mar. 31, 2012'</Log>
    <Log type="Info">	Process Flow-Through: Removing column '3 Months Ended
Dec. 31, 2011'</Log>
    <Log type="Info">	Process Flow-Through: Removing column '3 Months Ended
Sep. 30, 2011'</Log>
    <Log type="Info">	Process Flow-Through: Removing column '3 Months Ended
Jun. 30, 2011'</Log>
    <Log type="Info">	Process Flow-Through: Removing column '3 Months Ended
Mar. 31, 2011'</Log>
    <Log type="Info">Process Flow-Through: 0015 - Statement - CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (Parenthetical)</Log>
    <Log type="Info">Process Flow-Through: 0020 - Statement - CONSOLIDATED STATEMENTS OF FINANCIAL POSITION</Log>
    <Log type="Info">	Process Flow-Through: Removing column 'Dec. 31, 2010'</Log>
    <Log type="Info">	Process Flow-Through: Removing column 'Dec. 31, 2009'</Log>
    <Log type="Info">Process Flow-Through: 0025 - Statement - CONSOLIDATED STATEMENTS OF FINANCIAL POSITION (Parenthetical)</Log>
    <Log type="Info">Process Flow-Through: 0040 - Statement - CONSOLIDATED STATEMENTS OF CASH FLOWS</Log>
  </Logs>
  <InputFiles>
    <File>alic-20121231.xml</File>
    <File>alic-20121231.xsd</File>
    <File>alic-20121231_cal.xml</File>
    <File>alic-20121231_def.xml</File>
    <File>alic-20121231_lab.xml</File>
    <File>alic-20121231_pre.xml</File>
  </InputFiles>
  <SupplementalFiles />
  <BaseTaxonomies />
  <HasPresentationLinkbase>true</HasPresentationLinkbase>
  <HasCalculationLinkbase>true</HasCalculationLinkbase>
</FilingSummary>
