| Standard label: | Fair Value, Option, Changes in Fair Value, Gain (Loss) |
| Name: | us-gaap:FairValueOptionChangesInFairValueGainLoss1 |
| Documentation: | For each line item in the statement of financial position, the amounts of gains and losses from fair value changes included in earnings. |
| 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:FairValueOptionChangesInFairValueGainLoss1 |
| Label | Role | Language |
| Fair Value, Option, Changes in Fair Value, Gain (Loss) | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 825 10 50 30 (a) | http://fasb.org/us-gaap/role/ref/legacyRef | 825 |