| Standard label: | Discontinued Operation, Income (Loss) from Discontinued Operation During Phase-out Period, before Income Tax |
| Name: | us-gaap:DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodBeforeIncomeTax |
| Documentation: | Amount before tax of income (loss) from operations classified as a discontinued operation. Excludes gain (loss) on disposal and provision for gain (loss) until its disposal. |
| 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:DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodBeforeIncomeTax |
| Label | Role | Language |
| Discontinued Operation, Income (Loss) from Discontinued Operation During Phase-out Period, before Income Tax | http://www.xbrl.org/2003/role/label | en-US |
| Discontinued Operation, Income (Loss) from Discontinued Operation During Phase-out Period, before Income Tax, Total | http://www.xbrl.org/2003/role/totalLabel | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 205 20 50 5B (a) | http://fasb.org/us-gaap/role/ref/legacyRef | 205 |
| FASB Accounting Standards Codification 205 20 45 3A | http://fasb.org/us-gaap/role/ref/legacyRef | 205 |
| FASB Accounting Standards Codification 205 20 45 3 | http://fasb.org/us-gaap/role/ref/legacyRef | 205 |
| Part Of Roll Up: |
| us-gaap:DiscontinuedOperationIncomeLossFromDiscontinuedOperationBeforeIncomeTax |