| Name | MovementInGuaranteedBenefitLiabilityGrossRollForward |
|---|---|
| Namespace | http://fasb.org/us-gaap/2020-01-31 |
| Prefix | us-gaap |
| Data type | xbrli:stringItemType |
| Period type | duration |
| Substitution Group | xbrli:item |
| Balance | None |
| Nillable | True |
| Abstract | True |
| Text | Lang | Role | Container role |
|---|---|---|---|
| Movement in Liabilities for Guarantees on Long-Duration Contracts, Guaranteed Benefit Liability, Gross [Roll Forward] | en-US | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. | en-US | http://www.xbrl.org/2003/role/documentation | http://www.xbrl.org/2003/role/link |
| Name | Relation Type | Role | |
|---|---|---|---|
us-gaap:LiabilitiesForGuaranteesOnLongDurationContractsGuaranteedBenefitLiabilityGross | parent-child | http://fasb.org/us-gaap/role/disclosure/FinancialServicesInsurance | |
us-gaap:LiabilitiesForGuaranteesOnLongDurationContractsIncurredBenefits1 | parent-child | http://fasb.org/us-gaap/role/disclosure/FinancialServicesInsurance | |
us-gaap:LiabilitiesForGuaranteesOnLongDurationContractsPaymentForBenefits | parent-child | http://fasb.org/us-gaap/role/disclosure/FinancialServicesInsurance | |
us-gaap:GuaranteedBenefitLiabilityGrossPeriodIncreaseDecrease | parent-child | http://fasb.org/us-gaap/role/disclosure/FinancialServicesInsurance | |
us-gaap:LiabilitiesForGuaranteesOnLongDurationContractsGuaranteedBenefitLiabilityGross | parent-child | http://fasb.org/us-gaap/role/disclosure/FinancialServicesInsurance | |
us-gaap:LiabilitiesForGuaranteesOnLongDurationContractsGuaranteedBenefitLiabilityGross | domain-member | http://fasb.org/us-gaap/role/disclosure/FinancialServicesInsuranceLiabilitiesForGuaranteesOnLongDurationContractsTable | |
us-gaap:LiabilitiesForGuaranteesOnLongDurationContractsIncurredBenefits1 | domain-member | http://fasb.org/us-gaap/role/disclosure/FinancialServicesInsuranceLiabilitiesForGuaranteesOnLongDurationContractsTable | |
us-gaap:LiabilitiesForGuaranteesOnLongDurationContractsPaymentForBenefits | domain-member | http://fasb.org/us-gaap/role/disclosure/FinancialServicesInsuranceLiabilitiesForGuaranteesOnLongDurationContractsTable | |
us-gaap:GuaranteedBenefitLiabilityGrossPeriodIncreaseDecrease | domain-member | http://fasb.org/us-gaap/role/disclosure/FinancialServicesInsuranceLiabilitiesForGuaranteesOnLongDurationContractsTable |
| Name | Relation Type | Role | |
|---|---|---|---|
us-gaap:LiabilitiesForGuaranteesOnLongDurationContractsLineItems | parent-child | http://fasb.org/us-gaap/role/disclosure/FinancialServicesInsurance | |
us-gaap:LiabilitiesForGuaranteesOnLongDurationContractsLineItems | domain-member | http://fasb.org/us-gaap/role/disclosure/FinancialServicesInsuranceLiabilitiesForGuaranteesOnLongDurationContractsTable |