| Standard label: | Schedule of Long-term Debt Instruments [Table Text Block] |
| Name: | us-gaap:ScheduleOfDebtInstrumentsTextBlock |
| Documentation: | Tabular disclosure of long-debt instruments or arrangements, including identification, terms, features, collateral requirements and other information necessary to a fair presentation. These are debt arrangements that originally required repayment more than twelve months after issuance or greater than the normal operating cycle of the entity, if longer. |
| Object type: | cm:Level3TextBlock |
| Data type: | Text Block (HTML) (nonnum:textBlockItemType) |
| Period type: | For Period (duration) |
| Balance type: | (no balance type) |
| Abstract: | false |
| Workiva Wdesk Taxonomy Analyzer: | us-gaap:ScheduleOfDebtInstrumentsTextBlock |
| Examples of this text block disclosure: | LongTermDebtInstruments |
| Label | Role | Language |
| Schedule of Long-term Debt Instruments [Table Text Block] | http://www.xbrl.org/2003/role/label | en-US |