| Standard label: | Discontinued Operation, Tax Effect of Discontinued Operation |
| Name: | us-gaap:DiscontinuedOperationTaxEffectOfDiscontinuedOperation |
| Documentation: | Amount of tax expense (benefit) related to a discontinued operation. Includes, but is not limited to, tax expense (benefit) related to income (loss) from operations during the phase-out period, tax expense (benefit) related to gain (loss) on disposal, tax expense (benefit) related to gain (loss) for reversal of write-down (write-down) to fair value, less cost to sell, and tax expense (benefit) related to adjustments of a prior period gain (loss) on disposal. |
| Object type: | cm:Concept |
| Data type: | Monetary (xbrli:monetaryItemType) |
| Period type: | For Period (duration) |
| Balance type: | Debit |
| Abstract: | false |
| Workiva Wdesk Taxonomy Analyzer: | us-gaap:DiscontinuedOperationTaxEffectOfDiscontinuedOperation |
| Label | Role | Language |
| Discontinued Operation, Tax Effect of Discontinued Operation | http://www.xbrl.org/2003/role/label | en-US |
| Discontinued Operation, Tax Effect of Discontinued Operation, 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 3B | http://fasb.org/us-gaap/role/ref/legacyRef | 205 |
| FASB Accounting Standards Codification 205 20 50 5C (b)(2) | 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 50 1 (b) | http://fasb.org/us-gaap/role/ref/legacyRef | 205 |
| FASB Accounting Standards Codification 205 20 45 4 | http://fasb.org/us-gaap/role/ref/legacyRef | 205 |
| FASB Accounting Standards Codification 740 10 50 10 | http://fasb.org/us-gaap/role/ref/legacyRef | 740 |
| FASB Accounting Standards Codification 740 20 45 2 | http://fasb.org/us-gaap/role/ref/legacyRef | 740 |
| Part Of Roll Up: |
| us-gaap:IncomeLossFromDiscontinuedOperationsNetOfTax |
| us-gaap:IncomeTaxExpenseBenefitIntraperiodTaxAllocation |