| Standard label: | Investment Contracts [Member] |
| Name: | us-gaap:InvestmentContractsMember |
| Documentation: | The amount of the liability as of the balance sheet date pertaining to the guarantee given by the insurance entity to contract holders of a specified rate of return (a guaranteed yield) on their investments for a specified period. |
| Object type: | cm:Member |
| Data type: | [Member] (nonnum:domainItemType) |
| Period type: | For Period (duration) |
| Balance type: | (no balance type) |
| Abstract: | true |
| Workiva Wdesk Taxonomy Analyzer: | us-gaap:InvestmentContractsMember |
| Label | Role | Language |
| Investment Contracts [Member] | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 944 210 S99 1 (SX 210.7-03(a)(14)) | http://fasb.org/us-gaap/role/ref/legacyRef | 944 |