| Standard label: | Present Value of Future Insurance Profits, Unrealized Gain (Loss) on Investment |
| Name: | us-gaap:PresentValueOfFutureInsuranceProfitsUnrealizedGainLossOnInvestment |
| Documentation: | Amount of unrealized investment gain (loss) which decreases (increases) present value of future profits of insurance contract acquired in business combination. |
| Object type: | cm:Concept |
| Data type: | Monetary (xbrli:monetaryItemType) |
| Period type: | For Period (duration) |
| Balance type: | Credit |
| Abstract: | false |
| Workiva Wdesk Taxonomy Analyzer: | us-gaap:PresentValueOfFutureInsuranceProfitsUnrealizedGainLossOnInvestment |
| Label | Role | Language |
| Present Value of Future Insurance Profits, Unrealized Gain (Loss) on Investment | http://www.xbrl.org/2003/role/label | en-US |
| Present Value of Future Insurance Profits, Unrealized Gain (Loss) on Investment, Total | http://www.xbrl.org/2003/role/totalLabel | en-US |
| Reference | Role | Topic |