| Standard label: | Customer Securities for which Entity has Right to Sell or Repledge, Fair Value |
| Name: | us-gaap:CustomerSecuritiesForWhichEntityHasRightToSellOrRepledgeFairValue |
| Documentation: | Fair value as of the balance sheet date of customer securities accepted as collateral by the entity that it is permitted by contract or custom to sell or re-pledge to counterparties as collateral. |
| Object type: | cm:Concept |
| Data type: | Monetary (xbrli:monetaryItemType) |
| Period type: | As Of (instant) |
| Balance type: | Credit |
| Abstract: | false |
| Workiva Wdesk Taxonomy Analyzer: | us-gaap:CustomerSecuritiesForWhichEntityHasRightToSellOrRepledgeFairValue |
| Label | Role | Language |
| Customer Securities for which Entity has Right to Sell or Repledge, Fair Value | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 860 30 50 1A (c)(1) | http://fasb.org/us-gaap/role/ref/legacyRef | 860 |