| Standard label: | Debt Securities, Trading, and Equity Securities, FV-NI [Table] |
| Name: | us-gaap:ScheduleOfTradingSecuritiesAndOtherTradingAssetsTable |
| Documentation: | Disclosure of information about investment in debt security measured at fair value with change in fair value recognized in net income (trading) and investment in equity security with change in fair value recognized in net income (FV-NI). |
| Object type: | cm:Table |
| Data type: | Text/String (xbrli:stringItemType) |
| Period type: | For Period (duration) |
| Balance type: | (no balance type) |
| Abstract: | true |
| Workiva Wdesk Taxonomy Analyzer: | us-gaap:ScheduleOfTradingSecuritiesAndOtherTradingAssetsTable |
| Label | Role | Language |
| Debt Securities, Trading, and Equity Securities, FV-NI [Table] | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |