| Standard label: | Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge |
| Name: | us-gaap:ChangeInUnrealizedGainLossOnHedgedItemInFairValueHedge1 |
| Documentation: | Amount of the increase (decrease) in fair value of the hedged item in a fair value hedge recognized in the income statement. |
| Object type: | cm:Concept |
| Data type: | Monetary (xbrli:monetaryItemType) |
| Period type: | For Period (duration) |
| Balance type: | Credit |
| Abstract: | false |
| Workiva Wdesk Taxonomy Analyzer: | us-gaap:ChangeInUnrealizedGainLossOnHedgedItemInFairValueHedge1 |
| Label | Role | Language |
| Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 815 25 50 1 (a)(1) | http://fasb.org/us-gaap/role/ref/legacyRef | 815 |