| Name | PropertyCasualtyInsuranceUnderwritersAffiliationWithRegistrantDomain |
|---|---|
| Namespace | http://fasb.org/srt/2021-01-31 |
| Prefix | srt |
| Data type | dtr-types:domainItemType |
| Period type | duration |
| Substitution Group | xbrli:item |
| Balance | None |
| Nillable | True |
| Abstract | True |
| Text | Lang | Role | Container role |
|---|---|---|---|
| SEC Schedule, 12-18, Supplemental Information, Property-Casualty Insurance Underwriters, Affiliation with Registrant [Domain] | en-US | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Name | Relation Type | Role | |
|---|---|---|---|
srt:SupplementalInformationForPropertyCasualtyInsuranceUnderwritersByAffiliationWithRegistrantAxis | parent-child | http://fasb.org/srt/role/disclosure/SECScheduleArticle12-18SupplementalInformationForProperty-CasualtyInsuranceUnderwriters | |
srt:SupplementalInformationForPropertyCasualtyInsuranceUnderwritersByAffiliationWithRegistrantAxis | dimension-default | http://fasb.org/srt/role/disclosure/SECScheduleArticle12-18SupplementalInformationForProperty-CasualtyInsuranceUnderwritersSupplementalInformationForPropertyCasualtyInsuranceUnderwritersTable | |
srt:SupplementalInformationForPropertyCasualtyInsuranceUnderwritersByAffiliationWithRegistrantAxis | dimension-domain | http://fasb.org/srt/role/disclosure/SECScheduleArticle12-18SupplementalInformationForProperty-CasualtyInsuranceUnderwritersSupplementalInformationForPropertyCasualtyInsuranceUnderwritersTable |