| Standard label: | Fair Value of Securities Received as Collateral that Have Been Resold or Repledged |
| Name: | us-gaap:FairValueOfSecuritiesReceivedAsCollateralThatHaveBeenResoldOrRepledged |
| Documentation: | Fair value of the collateral, or portion thereof, that has been re-pledged, delivered, or otherwise used. |
| 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:FairValueOfSecuritiesReceivedAsCollateralThatHaveBeenResoldOrRepledged |
| Label | Role | Language |
| Fair Value of Securities Received as Collateral that Have Been Resold or Repledged | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 860 30 50 1A (c)(2) | http://fasb.org/us-gaap/role/ref/legacyRef | 860 |