| Standard label: | Debt Securities, Trading, and Equity Securities, FV-NI, Cost |
| Name: | us-gaap:DebtSecuritiesTradingAndEquitySecuritiesFvNiCost |
| Documentation: | Cost of investment in debt 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). Excludes equity method investment and investment in equity security without readily determinable fair value. |
| 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:DebtSecuritiesTradingAndEquitySecuritiesFvNiCost |
| Label | Role | Language |
| Debt Securities, Trading, and Equity Securities, FV-NI, Cost | http://www.xbrl.org/2003/role/label | en-US |
| Debt Securities, Trading, and Equity Securities, FV-NI, Cost, Total | http://www.xbrl.org/2003/role/totalLabel | en-US |
| Reference | Role | Topic |