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FAIR VALUE OF FINANCIAL INSTRUMENTS (Details 2) (USD $)
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Determination of fair values    
Number of primary sources of information used for determining fair value 1plico_FairValueDeterminationNumberOfSourcesOfInformationConsidered  
Total number of primary sources of information available for determining fair value 3plico_FairValueDeterminationNumberOfSourcesOfInformation  
Minimum percentage of the Company's fixed maturity securities priced by third party pricing services 90.00%plico_FairValueDeterminationPercentageOfFixedMaturitySecuritiesPricedByThirdPartyPricingServicesMinimum  
Number of independent non-binding broker quotes obtained per security 1plico_FairValueDeterminationNumberOfBrokerQuotesObtainedPerSecurity  
Percentage of derivatives excluding embedded derivatives that were priced using exchange prices or independent broker quotations 78.80%plico_PercentageOfDerivativesExcludingEmbeddedDerivativesPricedUsingExchangePricesOrIndependentBrokerQuotations  
Statutory policy liabilities (net of policy loans) 2,500,000,000us-gaap_LiabilityForFuturePolicyBenefits  
Fair value of the trading securities 2,800,000,000us-gaap_TradingSecurities  
Other long-term investments 270,701,000us-gaap_DerivativeFairValueOfDerivativeAsset 210,320,000us-gaap_DerivativeFairValueOfDerivativeAsset
Fair value, derivative liability 629,535,000us-gaap_DerivativeFairValueOfDerivativeLiability 455,161,000us-gaap_DerivativeFairValueOfDerivativeLiability
Annuity account balances    
Fixed indexed annuities, discount rate for one month (as a percent) 0.30%plico_LongDurationContractsAssumptionsByProductAndGuaranteeDiscountRateCurveOneMonth  
Fixed indexed annuities, discount rate for five years (as a percent) 2.37%plico_LongDurationContractsAssumptionsByProductAndGuaranteeDiscountRateCurveFiveYear  
Fixed indexed annuities, discount rate for thirty years (as a percent) 3.67%plico_LongDurationContractsAssumptionsByProductAndGuaranteeDiscountRateCurveThirtyYear  
Interest support, YRT premium support and portfolio maintenance agreement    
Determination of fair values    
Other long-term investments 6,100,000us-gaap_DerivativeFairValueOfDerivativeAsset
/ us-gaap_DerivativeInstrumentRiskAxis
= plico_InterestSupportYearlyRenewableTermPremiumSupportAndPortfolioMaintenanceAgreementMember
 
Golden Gate II Captive Insurance Company (Golden Gate II) | Interest Support Agreement    
Determination of fair values    
Other long-term investments 4,200,000us-gaap_DerivativeFairValueOfDerivativeAsset
/ us-gaap_DerivativeInstrumentRiskAxis
= plico_InterestSupportAgreementMember
/ dei_LegalEntityAxis
= plico_GoldenGateIICaptiveInsuranceCompanyMember
 
Payments Triggered Under Agreement 0plico_PaymentsTriggeredUnderAgreement
/ us-gaap_DerivativeInstrumentRiskAxis
= plico_InterestSupportAgreementMember
/ dei_LegalEntityAxis
= plico_GoldenGateIICaptiveInsuranceCompanyMember
 
Golden Gate II Captive Insurance Company (Golden Gate II) | YRT premium support agreement    
Determination of fair values    
Other long-term investments 1,700,000us-gaap_DerivativeFairValueOfDerivativeAsset
/ us-gaap_DerivativeInstrumentRiskAxis
= plico_YearlyRenewableTermPremiumSupportAgreementMember
/ dei_LegalEntityAxis
= plico_GoldenGateIICaptiveInsuranceCompanyMember
 
Payments Triggered Under Agreement 0plico_PaymentsTriggeredUnderAgreement
/ us-gaap_DerivativeInstrumentRiskAxis
= plico_YearlyRenewableTermPremiumSupportAgreementMember
/ dei_LegalEntityAxis
= plico_GoldenGateIICaptiveInsuranceCompanyMember
 
Golden Gate V and West Coast Life | Portfolio maintenance agreements    
Determination of fair values    
Other long-term investments 100,000us-gaap_DerivativeFairValueOfDerivativeAsset
/ us-gaap_DerivativeInstrumentRiskAxis
= plico_PortfolioMaintenanceAgreementMember
/ dei_LegalEntityAxis
= plico_GoldenGateVAndWestCoastLifeMember
 
Payments Triggered Under Agreement 0plico_PaymentsTriggeredUnderAgreement
/ us-gaap_DerivativeInstrumentRiskAxis
= plico_PortfolioMaintenanceAgreementMember
/ dei_LegalEntityAxis
= plico_GoldenGateVAndWestCoastLifeMember
 
Asset-Backed Securities | Level 2    
Determination of fair values    
Carrying amount 3,400,000,000us-gaap_InvestmentsFairValueDisclosure
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member
/ us-gaap_InvestmentTypeAxis
= us-gaap_AssetBackedSecuritiesMember
 
Asset-Backed Securities | Level 3    
Determination of fair values    
Carrying amount 733,400,000us-gaap_InvestmentsFairValueDisclosure
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
/ us-gaap_InvestmentTypeAxis
= us-gaap_AssetBackedSecuritiesMember
 
Other asset-backed securities    
Determination of fair values    
Percentage of underlying collateral of student-loan backed auction rate securities guaranteed by the Federal Family Education Loan Program ("FFELP"), minimum 97.00%plico_PercentageOfUnderlyingCollateralGuaranteedByThirdPartyMinimum
/ us-gaap_InvestmentTypeAxis
= us-gaap_AssetBackedSecuritiesSecuritizedLoansAndReceivablesMember
97.00%plico_PercentageOfUnderlyingCollateralGuaranteedByThirdPartyMinimum
/ us-gaap_InvestmentTypeAxis
= us-gaap_AssetBackedSecuritiesSecuritizedLoansAndReceivablesMember
Other asset-backed securities | Level 3 | Available-for-sale securities.    
Determination of fair values    
Carrying amount 564,000,000us-gaap_InvestmentsFairValueDisclosure
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
/ us-gaap_InvestmentSecondaryCategorizationAxis
= us-gaap_AvailableforsaleSecuritiesMember
/ us-gaap_InvestmentTypeAxis
= us-gaap_AssetBackedSecuritiesSecuritizedLoansAndReceivablesMember
 
Other asset-backed securities | Level 3 | Trading Securities.    
Determination of fair values    
Carrying amount 169,400,000us-gaap_InvestmentsFairValueDisclosure
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
/ us-gaap_InvestmentSecondaryCategorizationAxis
= us-gaap_TradingAccountAssetsMember
/ us-gaap_InvestmentTypeAxis
= us-gaap_AssetBackedSecuritiesSecuritizedLoansAndReceivablesMember
 
Percentage of underlying collateral of student-loan backed auction rate securities guaranteed by the Federal Family Education Loan Program ("FFELP"), minimum 97.00%plico_PercentageOfUnderlyingCollateralGuaranteedByThirdPartyMinimum
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
/ us-gaap_InvestmentSecondaryCategorizationAxis
= us-gaap_TradingAccountAssetsMember
/ us-gaap_InvestmentTypeAxis
= us-gaap_AssetBackedSecuritiesSecuritizedLoansAndReceivablesMember
 
Corporate Bonds, U.S. Government-Related Securities, States, Municipals, and Political Subdivisions, and Other Government Related Securities | Level 2    
Determination of fair values    
Carrying amount 29,800,000,000us-gaap_InvestmentsFairValueDisclosure
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member
/ us-gaap_InvestmentTypeAxis
= plico_CorporateBondsAndSecuritiesMember
 
Corporate Bonds, U.S. Government-Related Securities, States, Municipals, and Political Subdivisions, and Other Government Related Securities | Level 3    
Determination of fair values    
Carrying amount 1,400,000,000us-gaap_InvestmentsFairValueDisclosure
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
/ us-gaap_InvestmentTypeAxis
= plico_CorporateBondsAndSecuritiesMember
 
Equity securities    
Determination of fair values    
Fair value of the trading securities 21,500,000us-gaap_TradingSecurities
/ us-gaap_InvestmentTypeAxis
= us-gaap_EquitySecuritiesMember
21,200,000us-gaap_TradingSecurities
/ us-gaap_InvestmentTypeAxis
= us-gaap_EquitySecuritiesMember
Equity securities | Level 2 and Level 3    
Determination of fair values    
Carrying amount 166,000,000us-gaap_InvestmentsFairValueDisclosure
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= plico_FairValueInputsLevel2AndLevel3Member
/ us-gaap_InvestmentTypeAxis
= us-gaap_EquitySecuritiesMember
 
FHLB stock 66,000,000us-gaap_FederalHomeLoanBankStock
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= plico_FairValueInputsLevel2AndLevel3Member
/ us-gaap_InvestmentTypeAxis
= us-gaap_EquitySecuritiesMember
 
Embedded derivative - GMWB | Level 3    
Annuity account balances    
Discount rate curve, base rate LIBOR  
Embedded derivative - GMWB | Level 3 | Minimum    
Determination of fair values    
Mortality (as a percent) 44.50%plico_LongDurationContractsAssumptionsByProductAndGuaranteeMortalityRateRelativeToGMDB
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
/ us-gaap_InvestmentTypeAxis
= plico_EmbeddedDerivativeGMWBMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
 
Embedded derivative - GMWB | Level 3 | Maximum    
Determination of fair values    
Mortality (as a percent) 100.00%plico_LongDurationContractsAssumptionsByProductAndGuaranteeMortalityRateRelativeToGMDB
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
/ us-gaap_InvestmentTypeAxis
= plico_EmbeddedDerivativeGMWBMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
 
Embedded derivative - FIA | Level 3    
Annuity account balances    
Discount rate curve, base rate LIBOR  
Embedded derivative - FIA | Level 3 | Minimum    
Determination of fair values    
Mortality (as a percent) 49.00%plico_LongDurationContractsAssumptionsByProductAndGuaranteeMortalityRateRelativeToGMDB
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
/ us-gaap_InvestmentTypeAxis
= plico_EmbeddedDerivativeFIAMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
 
Embedded derivative - FIA | Level 3 | Maximum    
Determination of fair values    
Mortality (as a percent) 80.00%plico_LongDurationContractsAssumptionsByProductAndGuaranteeMortalityRateRelativeToGMDB
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
/ us-gaap_InvestmentTypeAxis
= plico_EmbeddedDerivativeFIAMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
 
Embedded derivative - IUL | Level 3    
Annuity account balances    
Discount rate curve, base rate LIBOR  
Embedded derivative - IUL | Level 3 | Minimum    
Determination of fair values    
Mortality (as a percent) 37.00%plico_LongDurationContractsAssumptionsByProductAndGuaranteeMortalityRateRelativeToGMDB
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
/ us-gaap_InvestmentTypeAxis
= plico_EmbeddedDerivativeIulMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
 
Embedded derivative - IUL | Level 3 | Maximum    
Determination of fair values    
Mortality (as a percent) 74.00%plico_LongDurationContractsAssumptionsByProductAndGuaranteeMortalityRateRelativeToGMDB
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
/ us-gaap_InvestmentTypeAxis
= plico_EmbeddedDerivativeIulMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
 
Funds withheld derivative | Level 2    
Determination of fair values    
Fair value, derivative liability 57,300,000us-gaap_DerivativeFairValueOfDerivativeLiability
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member
/ us-gaap_InvestmentTypeAxis
= plico_FundsWithheldDerivativeMember