| Standard label: | Additional Liability, Long-Duration Insurance, before Reinsurance, after Discount Rate Change |
| Name: | us-gaap:AdditionalLiabilityLongDurationInsuranceBeforeReinsuranceAfterDiscountRateChange |
| Documentation: | Amount, before effect of reinsurance and after current period update of cash flow assumption and discount rate change, of present value of total expected payment to policyholder in excess of present value of total expected assessment. Excludes benefit classified as market risk benefit or under provisions of Topic 815 on derivative and hedging. |
| Object type: | cm:Concept |
| Data type: | Monetary (xbrli:monetaryItemType) |
| Period type: | As Of (instant) |
| Balance type: | Credit |
| Abstract: | false |
| Workiva Wdesk Taxonomy Analyzer: | us-gaap:AdditionalLiabilityLongDurationInsuranceBeforeReinsuranceAfterDiscountRateChange |
| Label | Role | Language |
| Additional Liability, Long-Duration Insurance, before Reinsurance, after Discount Rate Change | http://www.xbrl.org/2003/role/label | en-US |
| Additional Liability, Long-Duration Insurance, before Reinsurance, after Discount Rate Change, Total | http://www.xbrl.org/2003/role/totalLabel | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 944 40 50 6 (a) | http://www.xbrl.org/2003/role/disclosureRef | 944 |
| FASB Accounting Standards Codification 944 40 50 6 (c) | http://www.xbrl.org/2003/role/disclosureRef | 944 |