| Standard label: | Number of Credit Risk Derivatives Held |
| Name: | us-gaap:NumberOfCreditRiskDerivativesHeld |
| Documentation: | Number of credit risk derivative instruments held. |
| Object type: | cm:Concept |
| Data type: | Integer (xbrli:integerItemType) |
| Period type: | As Of (instant) |
| Balance type: | (no balance type) |
| Abstract: | false |
| Workiva Wdesk Taxonomy Analyzer: | us-gaap:NumberOfCreditRiskDerivativesHeld |
| Label | Role | Language |
| Number of Credit Risk Derivatives Held | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 815 10 50 1A (d) | http://fasb.org/us-gaap/role/ref/legacyRef | 815 |
| FASB Accounting Standards Codification 815 10 50 1B | http://fasb.org/us-gaap/role/ref/legacyRef | 815 |