| Standard label: | Hedged Asset, Fair Value Hedge, Cumulative Increase (Decrease) |
| Name: | us-gaap:HedgedAssetFairValueHedgeCumulativeIncreaseDecrease |
| Documentation: | Amount of cumulative increase (decrease) in fair value of hedged asset in fair value hedge, attributable to hedged risk. |
| 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:HedgedAssetFairValueHedgeCumulativeIncreaseDecrease |
| Label | Role | Language |
| Hedged Asset, Fair Value Hedge, Cumulative Increase (Decrease) | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 815 10 50 4EE (b) | http://www.xbrl.org/2003/role/disclosureRef | 815 |