| Name | AdditionalLiabilityLongDurationInsurancePeriodIncreaseDecrease |
|---|---|
| Namespace | http://fasb.org/us-gaap/2021-01-31 |
| Prefix | us-gaap |
| Data type | xbrli:monetaryItemType |
| Period type | duration |
| Substitution Group | xbrli:item |
| Balance | None |
| Nillable | True |
| Abstract | False |
| Text | Lang | Role | Container role |
|---|---|---|---|
| Additional Liability, Long-Duration Insurance, Period Increase (Decrease) | en-US | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Additional Liability, Long-Duration Insurance, Period Increase (Decrease), Total | en-US | http://www.xbrl.org/2003/role/totalLabel | http://www.xbrl.org/2003/role/link |
| Amount of increase (decrease) in present value of total expected payment to policyholder in excess of present value of total expected assessment. Excludes benefit classified as market risk benefit or under provisions of Topic 815 on derivative and hedging. | en-US | http://www.xbrl.org/2003/role/documentation | http://www.xbrl.org/2003/role/link |
| Name | Value | Role |
|---|---|---|
| Note | Element is intended to be used for each reported period for which amendment from Accounting Standards Update identified in tin-part:Source_ASU_Number is applied. | http://fasb.org/us-gaap/role/tin/transition |
| PublishDate | 2019-01 | http://fasb.org/us-gaap/role/tin/transition |
| Source | ASU | http://fasb.org/us-gaap/role/tin/transition |
| SourceName | Long-duration Insurance | http://fasb.org/us-gaap/role/tin/transition |
| Source_ASU_Number | 2018-12 | http://fasb.org/us-gaap/role/tin/transition |
| Note | Element is modeled from perspective of statement of financial position. | http://fasb.org/us-gaap/role/tin/usage |
| PublishDate | 2019-01 | http://fasb.org/us-gaap/role/tin/usage |
| PublishDate | 2019-01 | http://fasb.org/us-gaap/role/tin/value |
| Positive_XBRL_Value | Increase | http://fasb.org/us-gaap/role/tin/value |
| Negative_XBRL_Value | Decrease | http://fasb.org/us-gaap/role/tin/value |
| elementCreationTaxonomyVersion | 2019 | http://fasb.org/us-gaap/role/tin/taxonomyImplementationNote |
| SourceName | Long-duration Insurance | http://fasb.org/srt/role/changeNote/changeNote |
| TaxonomyVersion | 2019 | http://fasb.org/srt/role/changeNote/changeNote |
| ChangeDate | 2018-08 | http://fasb.org/srt/role/changeNote/changeNote |
| NewElement | true | http://fasb.org/srt/role/changeNote/changeNote |
| Source_ASU_Number | 2018-12 | http://fasb.org/srt/role/changeNote/changeNote |
| Publisher | FASB | http://www.xbrl.org/2009/role/commonPracticeRef |
| Name | Accounting Standards Codification | http://www.xbrl.org/2009/role/commonPracticeRef |
| Topic | 944 | http://www.xbrl.org/2009/role/commonPracticeRef |
| SubTopic | 40 | http://www.xbrl.org/2009/role/commonPracticeRef |
| Section | 50 | http://www.xbrl.org/2009/role/commonPracticeRef |
| Paragraph | 6 | http://www.xbrl.org/2009/role/commonPracticeRef |
| Subparagraph | (a) | http://www.xbrl.org/2009/role/commonPracticeRef |
| URI | http://asc.fasb.org/extlink&oid=124506351&loc=d3e14931-158439 | http://www.xbrl.org/2009/role/commonPracticeRef |
| Name | Relation Type | Role | |
|---|---|---|---|
us-gaap:AdditionalLiabilityLongDurationInsuranceIssuance | summation-item | http://fasb.org/us-gaap/role/disclosure/FinancialServicesInsuranceA | |
us-gaap:AdditionalLiabilityLongDurationInsuranceInterestIncomeExpense | summation-item | http://fasb.org/us-gaap/role/disclosure/FinancialServicesInsuranceA | |
us-gaap:AdditionalLiabilityLongDurationInsuranceNetPremiumCollected | summation-item | http://fasb.org/us-gaap/role/disclosure/FinancialServicesInsuranceA | |
us-gaap:AdditionalLiabilityLongDurationInsuranceDerecognition | summation-item | http://fasb.org/us-gaap/role/disclosure/FinancialServicesInsuranceA | |
us-gaap:AdditionalLiabilityLongDurationInsuranceIncreaseDecreaseFromDiscountRateChange | summation-item | http://fasb.org/us-gaap/role/disclosure/FinancialServicesInsuranceA | |
us-gaap:AdditionalLiabilityLongDurationInsuranceBenefitPayment | summation-item | http://fasb.org/us-gaap/role/disclosure/FinancialServicesInsuranceA |
| Name | Relation Type | Role | |
|---|---|---|---|
us-gaap:AdditionalLiabilityLongDurationInsurancePeriodIncreaseDecreaseAbstract | parent-child | http://fasb.org/us-gaap/role/disclosure/FinancialServicesInsuranceA | |
us-gaap:AdditionalLiabilityLongDurationInsurancePeriodIncreaseDecreaseAbstract | domain-member | http://fasb.org/us-gaap/role/disclosure/FinancialServicesInsuranceAAdditionalLiabilityLongDurationInsuranceActivityTable |