| Standard label: | Fair Value, Net Derivative Asset (Liability), Recurring Basis, Still Held, Unrealized Gain (Loss), OCI |
| Name: | us-gaap:FairValueNetDerivativeAssetLiabilityRecurringBasisStillHeldUnrealizedGainLossOci |
| Documentation: | Amount of unrealized gain (loss) recognized in other comprehensive income (OCI) from derivative asset (liability) after deduction of derivative liability (asset), measured at fair value using unobservable input (level 3) and still held. |
| 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:FairValueNetDerivativeAssetLiabilityRecurringBasisStillHeldUnrealizedGainLossOci |
| Label | Role | Language |
| Fair Value, Net Derivative Asset (Liability), Recurring Basis, Still Held, Unrealized Gain (Loss), OCI | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 820 10 50 2 (d) | http://www.xbrl.org/2003/role/disclosureRef | 820 |