| Name | SupplementalInformationForPropertyCasualtyInsuranceUnderwritersTable |
|---|---|
| Namespace | http://fasb.org/srt/2020-01-31 |
| Prefix | srt |
| Data type | xbrli:stringItemType |
| Period type | duration |
| Substitution Group | xbrldt:hypercubeItem |
| Balance | None |
| Nillable | True |
| Abstract | True |
| Text | Lang | Role | Container role |
|---|---|---|---|
| SEC Schedule, 12-18, Supplemental Information, Property-Casualty Insurance Underwriters [Table] | en-US | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| 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 |
|---|---|---|
| Note | Element is intended to be used for financial statement schedule specified by Securities and Exchange Commission Regulation S-X. | http://fasb.org/us-gaap/role/tin/taxonomyImplementationNote |
| PublishDate | 2018-01 | http://fasb.org/us-gaap/role/tin/taxonomyImplementationNote |
| TaxonomyVersion | 2018 | http://fasb.org/srt/role/changeNote/changeNote |
| ChangeDate | 2017-08 | 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 | Discloses the information required to be reported as supplemental information for a registrant which is a property-casualty entity, or which has a consolidated property-casualty insurance underwriter subsidiary, an unconsolidated property-casualty subsidiary or a fifty percent-or-less owned property-casualty equity investee. | http://fasb.org/srt/role/changeNote/changeNote |
| Publisher | FASB | http://www.xbrl.org/2003/role/disclosureRef |
| Name | Accounting Standards Codification | http://www.xbrl.org/2003/role/disclosureRef |
| Topic | 944 | http://www.xbrl.org/2003/role/disclosureRef |
| SubTopic | 235 | http://www.xbrl.org/2003/role/disclosureRef |
| Section | S99 | http://www.xbrl.org/2003/role/disclosureRef |
| Paragraph | 3 | http://www.xbrl.org/2003/role/disclosureRef |
| Subparagraph | (SX 210.12-18) | http://www.xbrl.org/2003/role/disclosureRef |
| URI | http://asc.fasb.org/extlink&oid=120401096&loc=d3e575016-122915 | http://www.xbrl.org/2003/role/disclosureRef |
| 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 | |
|---|---|---|---|
SEC Schedule, 12-18, Supplemental Information, Property-Casualty Insurance Underwriters [Text Block] srt:ScheduleOfSupplementalInformationForPropertyCasualtyInsuranceUnderwritersTextBlock | parent-child | http://fasb.org/us-gaap/role/disclosure/SECScheduleArticle12-18SupplementalInformationForProperty-CasualtyInsuranceUnderwriters | |
SEC Schedule, 12-18, Supplemental Information, Property-Casualty Insurance Underwriters [Line Items] srt:SupplementalInformationForPropertyCasualtyInsuranceUnderwritersLineItems | all | http://fasb.org/us-gaap/role/disclosure/SECScheduleArticle12-18SupplementalInformationForProperty-CasualtyInsuranceUnderwritersSupplementalInformationForPropertyCasualtyInsuranceUnderwritersTable |