| Source | Taxonomy Implementation Guide | http://fasb.org/us-gaap/role/tin/resource |
| SourceName | Insurance: Concentration of Credit Risk Disclosures | http://fasb.org/us-gaap/role/tin/resource |
| pdfURI | https://www.fasb.org/insuranceconcentrationrisk_1 | http://fasb.org/us-gaap/role/tin/resource |
| inlineURI | https://xbrl.fasb.org/ix/?doc=../impdocs/CCR_TIG/inlinef2017icededcreditriskg.htm | http://fasb.org/us-gaap/role/tin/resource |
| elementCreationTaxonomyVersion | 2013 | http://fasb.org/us-gaap/role/tin/taxonomyImplementationNote |
| Publisher | FASB | http://www.xbrl.org/2009/role/commonPracticeRef |
| Name | Accounting Standards Codification | http://www.xbrl.org/2009/role/commonPracticeRef |
| Topic | 944 | http://www.xbrl.org/2009/role/commonPracticeRef |
| SubTopic | 825 | http://www.xbrl.org/2009/role/commonPracticeRef |
| Section | 50 | http://www.xbrl.org/2009/role/commonPracticeRef |
| Paragraph | 1B | http://www.xbrl.org/2009/role/commonPracticeRef |
| URI | https://asc.fasb.org/extlink&oid=123600520&loc=SL75241803-196195 | http://www.xbrl.org/2009/role/commonPracticeRef |