| Name | SupplementalInformationForPropertyCasualtyInsuranceUnderwritersByAffiliationWithRegistrantAxis |
|---|---|
| Namespace | http://fasb.org/srt/2020-01-31 |
| Prefix | srt |
| Data type | xbrli:stringItemType |
| Period type | duration |
| Substitution Group | xbrldt:dimensionItem |
| Balance | None |
| Nillable | True |
| Abstract | True |
| Text | Lang | Role | Container role |
|---|---|---|---|
| SEC Schedule, 12-18, Supplemental Information, Property-Casualty Insurance Underwriters, Affiliation with Registrant [Axis] | en-US | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Information by affiliation to property-casualty insurance underwriter. | en-US | http://www.xbrl.org/2003/role/documentation | http://www.xbrl.org/2003/role/link |
| Name | Value | Role |
|---|---|---|
| Publisher | SEC | http://www.xbrl.org/2003/role/disclosureRef |
| Name | Regulation S-X (SX) | http://www.xbrl.org/2003/role/disclosureRef |
| Number | 210 | http://www.xbrl.org/2003/role/disclosureRef |
| Section | 12 | http://www.xbrl.org/2003/role/disclosureRef |
| Paragraph | Column A | http://www.xbrl.org/2003/role/disclosureRef |
| Subsection | 18 | http://www.xbrl.org/2003/role/disclosureRef |
| Name | Relation Type | Role | |
|---|---|---|---|
srt:PropertyCasualtyInsuranceUnderwritersAffiliationWithRegistrantDomain | parent-child | http://fasb.org/srt/role/disclosure/SECScheduleArticle12-18SupplementalInformationForProperty-CasualtyInsuranceUnderwriters | |
srt:PropertyCasualtyInsuranceUnderwritersAffiliationWithRegistrantDomain | dimension-default | http://fasb.org/srt/role/disclosure/SECScheduleArticle12-18SupplementalInformationForProperty-CasualtyInsuranceUnderwritersSupplementalInformationForPropertyCasualtyInsuranceUnderwritersTable | |
srt:PropertyCasualtyInsuranceUnderwritersAffiliationWithRegistrantDomain | dimension-domain | http://fasb.org/srt/role/disclosure/SECScheduleArticle12-18SupplementalInformationForProperty-CasualtyInsuranceUnderwritersSupplementalInformationForPropertyCasualtyInsuranceUnderwritersTable |
| Name | Relation Type | Role | |
|---|---|---|---|
srt:SupplementalInformationForPropertyCasualtyInsuranceUnderwritersTable | parent-child | http://fasb.org/srt/role/disclosure/SECScheduleArticle12-18SupplementalInformationForProperty-CasualtyInsuranceUnderwriters | |
srt:SupplementalInformationForPropertyCasualtyInsuranceUnderwritersTable | hypercube-dimension | http://fasb.org/srt/role/disclosure/SECScheduleArticle12-18SupplementalInformationForProperty-CasualtyInsuranceUnderwritersSupplementalInformationForPropertyCasualtyInsuranceUnderwritersTable |