| Name | ForeignReinsuranceUnderOpenYearMethodAbstract |
|---|---|
| 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 |
|---|---|---|---|
| Foreign Reinsurance under Open Year Method [Abstract] | en-US | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Name | Relation Type | Role | |
|---|---|---|---|
us-gaap:ForeignReinsuranceUnderOpenYearMethodComment | parent-child | http://fasb.org/us-gaap/role/disclosure/FinancialServicesInsurance | |
us-gaap:ForeignReinsuranceUnderOpenYearMethodPremiums | parent-child | http://fasb.org/us-gaap/role/disclosure/FinancialServicesInsurance | |
us-gaap:ForeignReinsuranceUnderOpenYearMethodClaims | parent-child | http://fasb.org/us-gaap/role/disclosure/FinancialServicesInsurance | |
us-gaap:ForeignReinsuranceUnderOpenYearMethodExpense | parent-child | http://fasb.org/us-gaap/role/disclosure/FinancialServicesInsurance | |
us-gaap:ForeignReinsuranceTransactionsPremiumsRecognizedAsIncome | parent-child | http://fasb.org/us-gaap/role/disclosure/FinancialServicesInsurance | |
us-gaap:ForeignReinsuranceTransactionsPremiumAdditionsToUnderwritingBalances | parent-child | http://fasb.org/us-gaap/role/disclosure/FinancialServicesInsurance | |
us-gaap:ForeignReinsuranceTransactionsClaimsRecognizedAsIncome | parent-child | http://fasb.org/us-gaap/role/disclosure/FinancialServicesInsurance | |
us-gaap:ForeignReinsuranceTransactionsClaimsAdditionsToUnderwritingBalances | parent-child | http://fasb.org/us-gaap/role/disclosure/FinancialServicesInsurance | |
us-gaap:ForeignReinsuranceTransactionsExpenseRecognizedAsIncome | parent-child | http://fasb.org/us-gaap/role/disclosure/FinancialServicesInsurance | |
us-gaap:ForeignReinsuranceTransactionsExpenseAdditionsToUnderwritingBalances | parent-child | http://fasb.org/us-gaap/role/disclosure/FinancialServicesInsurance |
| Name | Relation Type | Role | |
|---|---|---|---|
us-gaap:ReinsuranceTextBlock | parent-child | http://fasb.org/us-gaap/role/disclosure/FinancialServicesInsurance |