| Standard label: | Comprehensive Income (Loss) [Table Text Block] |
| Name: | us-gaap:ScheduleOfComprehensiveIncomeLossTableTextBlock |
| Documentation: | Tabular disclosure of components of comprehensive income (loss). Includes, but is not limited to, foreign currency translation adjustments, foreign currency transactions designated as economic hedges of a net investment in foreign entity, gain (loss) and prior service cost (credit) for pension plans and other postretirement benefit plans. |
| 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:ScheduleOfComprehensiveIncomeLossTableTextBlock |
| Examples of this text block disclosure: | ComprehensiveIncomeLoss |
| Label | Role | Language |
| Comprehensive Income (Loss) [Table Text Block] | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 220 10 45 1 | http://fasb.org/us-gaap/role/ref/legacyRef | 220 |