| Standard label: | Deferred Policy Acquisition Costs and Present Value of Future Insurance Profits, Amortization |
| Name: | us-gaap:DeferredPolicyAcquisitionCostsAndPresentValueOfFutureProfitsAmortization1 |
| Documentation: | Amount of amortization expense (reversal of expense) for deferred policy acquisition costs and present value of future profits from insurance contract acquired in business combination. |
| 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:DeferredPolicyAcquisitionCostsAndPresentValueOfFutureProfitsAmortization1 |
| Label | Role | Language |
| Deferred Policy Acquisition Costs and Present Value of Future Insurance Profits, Amortization | http://www.xbrl.org/2003/role/label | en-US |
| Deferred Policy Acquisition Costs and Present Value of Future Insurance Profits, Amortization, Total | http://www.xbrl.org/2003/role/totalLabel | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 944 20 S99 2 (2) | http://fasb.org/us-gaap/role/ref/legacyRef | 944 |
| FASB Accounting Standards Codification 944 30 50 1 (c) | http://fasb.org/us-gaap/role/ref/legacyRef | 944 |