| Standard label: | Costs Associated with Exit or Disposal Activity or Restructuring [Policy Text Block] |
| Name: | us-gaap:CostsAssociatedWithExitOrDisposalActivitiesOrRestructuringsPolicy |
| Documentation: | Disclosure of accounting policy for cost associated with exit or disposal activity or restructuring. Excludes entity newly acquired in business combination and discontinued operation. |
| Object type: | cm:Level2TextBlock |
| 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:CostsAssociatedWithExitOrDisposalActivitiesOrRestructuringsPolicy |
| Label | Role | Language |
| Costs Associated with Exit or Disposal Activity or Restructuring [Policy Text Block] | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 235 10 50 3 | http://fasb.org/us-gaap/role/ref/legacyRef | 235 |
| FASB Accounting Standards Codification 420 10 S99 1 (SAB Topic 5.P.3) | http://fasb.org/us-gaap/role/ref/legacyRef | 420 |
| FASB Accounting Standards Codification 420 10 S99 1 (SAB TOPIC 5.P.3,4) | http://fasb.org/us-gaap/role/ref/legacyRef | 420 |
| FASB Accounting Standards Codification 420 10 S99 2 (SAB Topic 5.P.4) | http://fasb.org/us-gaap/role/ref/legacyRef | 420 |