 | us-gaap:VariableInterestEntityLineItems | parent-child | http://fasb.org/us-gaap/role/disclosure/OrganizationConsolidationAndPresentationOfFinancialStatements |
 | us-gaap:VariableInterestEntityLineItems | parent-child | http://fasb.org/us-gaap/role/disclosure/AccountingPolicies |
 | us-gaap:DefinedBenefitPlanNetPeriodicBenefitCostAbstract | parent-child | http://fasb.org/us-gaap/role/disclosure/CompensationRelatedCostsRetirementBenefits |
 | us-gaap:ChangeInValuationTechniqueAbstract | parent-child | http://fasb.org/us-gaap/role/disclosure/FinancialInstrumentsFairValueDisclosures |
 | us-gaap:FairValueByFairValueHierarchyLevelExtensibleListAbstract | parent-child | http://fasb.org/us-gaap/role/disclosure/FinancialInstrumentsFairValueDisclosures |
 | us-gaap:FinancialInstrumentTypeExtensibleListAbstract | parent-child | http://fasb.org/us-gaap/role/disclosure/FinancialInstrumentsFairValueDisclosures |
 | us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax | parent-child | http://fasb.org/us-gaap/role/disclosure/RevenuefromContractswithCustomers |
 | us-gaap:DeferredPolicyAcquisitionCostLineItems | parent-child | http://fasb.org/us-gaap/role/disclosure/FinancialServicesInsuranceA |
 | us-gaap:DeferredPolicyAcquisitionCostAndPresentValueOfFutureProfitLineItems | parent-child | http://fasb.org/us-gaap/role/disclosure/FinancialServicesInsuranceA |
 | us-gaap:DeferredSaleInducementCostLineItems | parent-child | http://fasb.org/us-gaap/role/disclosure/FinancialServicesInsuranceA |
 | us-gaap:PolicyholderFunds | parent-child | http://fasb.org/us-gaap/role/disclosure/FinancialServicesInsuranceA |
 | us-gaap:PresentValueOfFutureInsuranceProfitLineItems | parent-child | http://fasb.org/us-gaap/role/disclosure/FinancialServicesInsuranceA |