| Standard label: | Credit Derivative, Purchased Credit Protection |
| Name: | us-gaap:CreditDerivativePurchasedCreditProtection |
| Documentation: | Amount of purchased credit protection expected to cover future payments under the credit risk derivative. |
| 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:CreditDerivativePurchasedCreditProtection |
| Label | Role | Language |
| Credit Derivative, Purchased Credit Protection | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 815 10 50 4K (f) | http://fasb.org/us-gaap/role/ref/legacyRef | 815 |