| Standard label: | Present Value of Future Insurance Profits, Amortization Expense, Excluding Accrued Interest |
| Name: | us-gaap:PresentValueOfFutureInsuranceProfitsAmortizationExpenseExcludingAccruedInterest |
| Documentation: | Amount of amortization expense (reversal of amortization expense) for present value of future profits of insurance contract acquired in business combination, excluding accrued interest on unamortized balance. |
| Object type: | cm:Concept |
| Data type: | Monetary (xbrli:monetaryItemType) |
| Period type: | For Period (duration) |
| Balance type: | Debit |
| Abstract: | false |
| Workiva Wdesk Taxonomy Analyzer: | us-gaap:PresentValueOfFutureInsuranceProfitsAmortizationExpenseExcludingAccruedInterest |
| Label | Role | Language |
| Present Value of Future Insurance Profits, Amortization Expense, Excluding Accrued Interest | http://www.xbrl.org/2003/role/label | en-US |
| Present Value of Future Insurance Profits, Amortization Expense, Excluding Accrued Interest, Total | http://www.xbrl.org/2003/role/totalLabel | en-US |
| Reference | Role | Topic |