| Name | ScheduleOfSupplementalInformationForPropertyCasualtyInsuranceUnderwritersTextBlock |
|---|---|
| Namespace | http://fasb.org/srt/2020-01-31 |
| Prefix | srt |
| Data type | nonnum:textBlockItemType |
| Period type | duration |
| Substitution Group | xbrli:item |
| Balance | None |
| Nillable | True |
| Abstract | False |
| Text | Lang | Role | Container role |
|---|---|---|---|
| SEC Schedule, 12-18, Supplemental Information, Property-Casualty Insurance Underwriters [Text Block] | en-US | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| The entire disclosure of supplemental information for registrant, its subsidiary and 50%-or-less-owned equity basis investee, with liability for property-casualty insurance claim. | 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 |
| Subsection | 18 | http://www.xbrl.org/2003/role/disclosureRef |
| Name | Relation Type | Role | |
|---|---|---|---|
srt:SupplementalInformationForPropertyCasualtyInsuranceUnderwritersTable | parent-child | http://fasb.org/srt/role/disclosure/SECScheduleArticle12-18SupplementalInformationForProperty-CasualtyInsuranceUnderwriters |
| Name | Relation Type | Role | |
|---|---|---|---|
srt:SupplementalInformationForPropertyCasualtyInsuranceUnderwritersAbstract | parent-child | http://fasb.org/srt/role/disclosure/SECScheduleArticle12-18SupplementalInformationForProperty-CasualtyInsuranceUnderwriters |