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Fair Value of Assets and Liabilities (Level 3 Assets and Liabilities)(Footnotes to Table) (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Dec. 31, 2014
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]      
Fair Value, Assets and Liabilities Measured on Recurring Basis, Gain (Loss) Included in Earnings $ (6)us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisGainLossIncludedInEarnings $ 16us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisGainLossIncludedInEarnings  
Total gains (losses) included in: Net income (2)us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1 1us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1  
Free-standing derivatives, assets   5alic_FreeStandingDerivativeAssetsFairValueDisclosure  
Free Standing Derivative Liabilities, Fair Value Disclosure 9alic_FreeStandingDerivativeLiabilitiesFairValueDisclosure 12alic_FreeStandingDerivativeLiabilitiesFairValueDisclosure  
Fair Value Measurement with Unobservable Inputs Reconciliation Recurring Basis Asset Transfers to Held For Sale   0alic_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersToHeldForSale  
CMBS      
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]      
Total gains (losses) included in: Net income 0us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1
/ us-gaap_FairValueByAssetClassAxis
= us-gaap_CommercialMortgageBackedSecuritiesMember
0us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1
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Fair Value Measurement with Unobservable Inputs Reconciliation Recurring Basis Asset Transfers to Held For Sale   (4)alic_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersToHeldForSale
/ us-gaap_FairValueByAssetClassAxis
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ABS      
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]      
Total gains (losses) included in: Net income 0us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1
/ us-gaap_FairValueByAssetClassAxis
= us-gaap_AssetBackedSecuritiesMember
0us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1
/ us-gaap_FairValueByAssetClassAxis
= us-gaap_AssetBackedSecuritiesMember
 
Fair Value Measurement with Unobservable Inputs Reconciliation Recurring Basis Asset Transfers to Held For Sale   0alic_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersToHeldForSale
/ us-gaap_FairValueByAssetClassAxis
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Net investment income      
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]      
Total gains (losses) included in: Net income 3us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1
/ us-gaap_IncomeStatementLocationAxis
= alic_NetInvestmentIncomeMember
2us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1
/ us-gaap_IncomeStatementLocationAxis
= alic_NetInvestmentIncomeMember
 
Gains (losses) for Level 3 assets and liabilities still held at the balance sheet date 3us-gaap_FairValueAssetsMeasuredOnRecurringBasisChangeInUnrealizedGainLoss
/ us-gaap_IncomeStatementLocationAxis
= alic_NetInvestmentIncomeMember
3us-gaap_FairValueAssetsMeasuredOnRecurringBasisChangeInUnrealizedGainLoss
/ us-gaap_IncomeStatementLocationAxis
= alic_NetInvestmentIncomeMember
 
Interest credited to contractholder funds      
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]      
Total gains (losses) included in: Net income (4)us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1
/ us-gaap_IncomeStatementLocationAxis
= alic_InterestCreditedToContractholderFundsMember
10us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1
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Gains (losses) for Level 3 assets and liabilities still held at the balance sheet date (4)us-gaap_FairValueAssetsMeasuredOnRecurringBasisChangeInUnrealizedGainLoss
/ us-gaap_IncomeStatementLocationAxis
= alic_InterestCreditedToContractholderFundsMember
10us-gaap_FairValueAssetsMeasuredOnRecurringBasisChangeInUnrealizedGainLoss
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= alic_InterestCreditedToContractholderFundsMember
 
Contract benefits      
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]      
Gains (losses) for Level 3 assets and liabilities still held at the balance sheet date   5us-gaap_FairValueAssetsMeasuredOnRecurringBasisChangeInUnrealizedGainLoss
/ us-gaap_IncomeStatementLocationAxis
= alic_ContractBenefitsMember
 
Discontinued Operations [Member]      
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]      
Gains (losses) for Level 3 assets and liabilities still held at the balance sheet date   (4)us-gaap_FairValueAssetsMeasuredOnRecurringBasisChangeInUnrealizedGainLoss
/ us-gaap_IncomeStatementLocationAxis
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Loss on disposition of operations      
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]      
Gains (losses) for Level 3 assets and liabilities still held at the balance sheet date   (2)us-gaap_FairValueAssetsMeasuredOnRecurringBasisChangeInUnrealizedGainLoss
/ us-gaap_IncomeStatementLocationAxis
= alic_LossOnDispositionOfOperationsMember
 
Realized capital gains and losses      
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]      
Total gains (losses) included in: Net income (5)us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1
/ us-gaap_IncomeStatementLocationAxis
= alic_RealizedCapitalGainsAndLossesMember
3us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1
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= alic_RealizedCapitalGainsAndLossesMember
 
Gains (losses) for Level 3 assets and liabilities still held at the balance sheet date (1)us-gaap_FairValueAssetsMeasuredOnRecurringBasisChangeInUnrealizedGainLoss
/ us-gaap_IncomeStatementLocationAxis
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1us-gaap_FairValueAssetsMeasuredOnRecurringBasisChangeInUnrealizedGainLoss
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Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Recurring [Member]      
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]      
Free-standing derivatives, assets 2alic_FreeStandingDerivativeAssetsFairValueDisclosure
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
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  2alic_FreeStandingDerivativeAssetsFairValueDisclosure
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Free Standing Derivative Liabilities, Fair Value Disclosure $ 9alic_FreeStandingDerivativeLiabilitiesFairValueDisclosure
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
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  $ 9alic_FreeStandingDerivativeLiabilitiesFairValueDisclosure
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