| Standard label: | Financial Guarantee Insurance Contracts, Premium Receivable, Premium Expected to be Collected, Next Twelve Months |
| Name: | us-gaap:FinancialGuaranteeInsuranceContractsPremiumExpectedToBeCollectedWithinOneYearFromBalanceSheetDate |
| Documentation: | Amount of premium receivables under financial guarantee insurance contracts expected to be collected in the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. |
| Object type: | cm:Concept |
| Data type: | Monetary (xbrli:monetaryItemType) |
| Period type: | As Of (instant) |
| Balance type: | Debit |
| Abstract: | false |
| Workiva Wdesk Taxonomy Analyzer: | us-gaap:FinancialGuaranteeInsuranceContractsPremiumExpectedToBeCollectedWithinOneYearFromBalanceSheetDate |
| Label | Role | Language |
| Financial Guarantee Insurance Contracts, Premium Receivable, Premium Expected to be Collected, Next Twelve Months | http://www.xbrl.org/2003/role/label | en-US |
| Financial Guarantee Insurance Contracts, Premium Receivable, Premium Expected to be Collected, Next Twelve Months, Total | http://www.xbrl.org/2003/role/totalLabel | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 944 310 50 3 | http://fasb.org/us-gaap/role/ref/legacyRef | 944 |