| Standard label: | Present Value of Future Insurance Profits, Amortization Expense, Realized Gain (Loss) |
| Name: | us-gaap:PresentValueOfFutureInsuranceProfitsAmortizationExpenseRealizedGainLoss |
| Documentation: | Amount of amortization expense (reversal of amortization expense) for future profits of insurance contract acquired in business combination from realized investment gain (loss). |
| 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:PresentValueOfFutureInsuranceProfitsAmortizationExpenseRealizedGainLoss |
| Label | Role | Language |
| Present Value of Future Insurance Profits, Amortization Expense, Realized Gain (Loss) | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |