| Standard label: | Fair Value, Option, Changes in Instrument Specific Credit Risk, Gains (Losses) on Liabilities, Reasons |
| Name: | us-gaap:FairValueOptionChangesInInstrumentSpecificCreditRiskGainsLossesOnLiabilitiesReasons |
| Documentation: | For liabilities with fair values that have been significantly affected during the reporting period by changes in the instrument-specific credit risk, this item provides qualitative information about the reasons for those changes. |
| Object type: | cm:Concept |
| Data type: | Text/String (xbrli:stringItemType) |
| Period type: | For Period (duration) |
| Balance type: | (no balance type) |
| Abstract: | false |
| Workiva Wdesk Taxonomy Analyzer: | us-gaap:FairValueOptionChangesInInstrumentSpecificCreditRiskGainsLossesOnLiabilitiesReasons |
| Label | Role | Language |
| Fair Value, Option, Changes in Instrument Specific Credit Risk, Gains (Losses) on Liabilities, Reasons | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 825 10 50 30 (d)(2) | http://fasb.org/us-gaap/role/ref/legacyRef | 825 |