XML 13 R48.htm IDEA: XBRL DOCUMENT v2.4.1.9
Deferred Acquisition Costs - Deferred Policy Acquisition Costs and Asset Reconciliation (Detail) (USD $)
In Millions, unless otherwise specified
 3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]    
Deferred policy acquisition costs asset, beginning of period $ 578us-gaap_DeferredPolicyAcquisitionCosts $ 565us-gaap_DeferredPolicyAcquisitionCosts
Capitalized deferred policy acquisition costs 207us-gaap_DeferredPolicyAcquisitionCostsAdditions 206us-gaap_DeferredPolicyAcquisitionCostsAdditions
Amortized deferred policy acquisition costs (209)us-gaap_DeferredPolicyAcquisitionCostAmortizationExpenseNetInvestmentGainsLosses (201)us-gaap_DeferredPolicyAcquisitionCostAmortizationExpenseNetInvestmentGainsLosses
Amortized shadow deferred policy acquisition costs (5)us-gaap_DeferredPolicyAcquisitionCostAmortizationExpenseUnrealizedInvestmentGainsLosses (6)us-gaap_DeferredPolicyAcquisitionCostAmortizationExpenseUnrealizedInvestmentGainsLosses
Deferred policy acquisition costs asset, end of period $ 571us-gaap_DeferredPolicyAcquisitionCosts $ 564us-gaap_DeferredPolicyAcquisitionCosts