| Name | ScheduleOfFairValueOfSeparateAccountsByMajorCategoryOfInvestmentTable |
|---|---|
| Namespace | http://fasb.org/us-gaap/2021-01-31 |
| Prefix | us-gaap |
| Data type | xbrli:stringItemType |
| Period type | duration |
| Substitution Group | xbrldt:hypercubeItem |
| Balance | None |
| Nillable | True |
| Abstract | True |
| Text | Lang | Role | Container role |
|---|---|---|---|
| Fair Value, Separate Account Investment [Table] | en-US | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Disclosure of information about fair value of asset supporting separate account. | en-US | http://www.xbrl.org/2003/role/documentation | http://www.xbrl.org/2003/role/link |
| Name | Value | Role |
|---|---|---|
| elementCreationTaxonomyVersion | 2008 | http://fasb.org/us-gaap/role/tin/taxonomyImplementationNote |
| SourceName | Long-duration Insurance:Taxonomy Technical Improvement | http://fasb.org/srt/role/changeNote/changeNote |
| TaxonomyVersion | 2020 | http://fasb.org/srt/role/changeNote/changeNote |
| ChangeDate | 2019-07 | http://fasb.org/srt/role/changeNote/changeNote |
| ModifiedReferences | true | http://fasb.org/srt/role/changeNote/changeNote |
| Source_ASU_Number | 2018-12 | http://fasb.org/srt/role/changeNote/changeNote |
| 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 |
| ModifiedReferences | true | http://fasb.org/srt/role/changeNote/changeNote |
| ModifiedLabels | true | http://fasb.org/srt/role/changeNote/changeNote |
| ModifiedDocumentation | true | http://fasb.org/srt/role/changeNote/changeNote |
| PreviousDocumentation | Disclose the aggregate fair value of assets, by major investment asset category, supporting separate accounts with additional insurance benefits and minimum investment return guarantees as of each date for which a statement of financial position is presented. The taxonomy for investment disclosures is utilized to tag elements that represent more detailed breakdowns of the major investment categories specified in reporting regulations. | 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/2003/role/exampleRef |
| Name | Accounting Standards Codification | http://www.xbrl.org/2003/role/exampleRef |
| Topic | 944 | http://www.xbrl.org/2003/role/exampleRef |
| SubTopic | 20 | http://www.xbrl.org/2003/role/exampleRef |
| Section | 55 | http://www.xbrl.org/2003/role/exampleRef |
| Paragraph | 15 | http://www.xbrl.org/2003/role/exampleRef |
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| Paragraph | 17 | http://www.xbrl.org/2003/role/exampleRef |
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| 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 |
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| Section | 50 | http://www.xbrl.org/2009/role/commonPracticeRef |
| Paragraph | 1 | http://www.xbrl.org/2009/role/commonPracticeRef |
| Subparagraph | (e) | http://www.xbrl.org/2009/role/commonPracticeRef |
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| Name | Relation Type | Role | |
|---|---|---|---|
us-gaap:InvestmentTypeAxis | parent-child | http://fasb.org/us-gaap/role/disclosure/FinancialServicesInsurance | |
us-gaap:ScheduleOfFairValueOfSeparateAccountsByMajorCategoryOfInvestmentLineItems | parent-child | http://fasb.org/us-gaap/role/disclosure/FinancialServicesInsurance | |
us-gaap:InvestmentTypeAxis | hypercube-dimension | http://fasb.org/us-gaap/role/disclosure/FinancialServicesInsuranceScheduleOfFairValueOfSeparateAccountsByMajorCategoryOfInvestmentTable | |
us-gaap:SeparateAccountAssetCategoryAxis | parent-child | http://fasb.org/us-gaap/role/disclosure/FinancialServicesInsuranceA | |
us-gaap:ScheduleOfFairValueOfSeparateAccountsByMajorCategoryOfInvestmentLineItems | parent-child | http://fasb.org/us-gaap/role/disclosure/FinancialServicesInsuranceA | |
us-gaap:SeparateAccountAssetCategoryAxis | hypercube-dimension | http://fasb.org/us-gaap/role/disclosure/FinancialServicesInsuranceAScheduleOfFairValueOfSeparateAccountsByMajorCategoryOfInvestmentTable |
| Name | Relation Type | Role | |
|---|---|---|---|
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us-gaap:ScheduleOfFairValueOfSeparateAccountsByMajorCategoryOfInvestmentTextBlock | parent-child | http://fasb.org/us-gaap/role/disclosure/FinancialServicesInsuranceA | |
us-gaap:ScheduleOfFairValueOfSeparateAccountsByMajorCategoryOfInvestmentLineItems | all | http://fasb.org/us-gaap/role/disclosure/FinancialServicesInsuranceAScheduleOfFairValueOfSeparateAccountsByMajorCategoryOfInvestmentTable |