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Investments (Realized Investment Gains Losses Net) (Details) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Schedule Of Gain Loss On Investments [Line Items]    
Realized investment gains (losses), net $ 13,475us-gaap_RealizedInvestmentGainsLosses $ (171)us-gaap_RealizedInvestmentGainsLosses
Fixed Maturities [Member]    
Schedule Of Gain Loss On Investments [Line Items]    
Realized investment gains (losses), net 1,862us-gaap_RealizedInvestmentGainsLosses
/ cik881453_ScheduleOfGainLossOnInvestmentsAxis
= us-gaap_FixedMaturitiesMember		 806us-gaap_RealizedInvestmentGainsLosses
/ cik881453_ScheduleOfGainLossOnInvestmentsAxis
= us-gaap_FixedMaturitiesMember
Commercial Mortgage Loans [Member]    
Schedule Of Gain Loss On Investments [Line Items]    
Realized investment gains (losses), net 75us-gaap_RealizedInvestmentGainsLosses
/ cik881453_ScheduleOfGainLossOnInvestmentsAxis
= cik881453_CommercialMortgageLoansMember		 0us-gaap_RealizedInvestmentGainsLosses
/ cik881453_ScheduleOfGainLossOnInvestmentsAxis
= cik881453_CommercialMortgageLoansMember
Derivative [Member]    
Schedule Of Gain Loss On Investments [Line Items]    
Realized investment gains (losses), net $ 11,538us-gaap_RealizedInvestmentGainsLosses
/ cik881453_ScheduleOfGainLossOnInvestmentsAxis
= us-gaap_DerivativeMember		 $ (977)us-gaap_RealizedInvestmentGainsLosses
/ cik881453_ScheduleOfGainLossOnInvestmentsAxis
= us-gaap_DerivativeMember