| Standard label: | Deferred Income Tax Expense (Benefit) |
| Name: | us-gaap:DeferredIncomeTaxExpenseBenefit |
| Documentation: | Amount of deferred income tax expense (benefit) pertaining to income (loss) from continuing operations. |
| 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:DeferredIncomeTaxExpenseBenefit |
| Label | Role | Language |
| Deferred Income Tax Expense (Benefit) | http://www.xbrl.org/2003/role/label | en-US |
| Deferred Income Tax Expense (Benefit), Total | http://www.xbrl.org/2003/role/totalLabel | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 230 10 45 28 (b) | http://fasb.org/us-gaap/role/ref/legacyRef | 230 |
| FASB Accounting Standards Codification 235 10 S99 1 (SX 210.4-08(h)) | http://fasb.org/us-gaap/role/ref/legacyRef | 235 |
| FASB Accounting Standards Codification 740 10 S99 1 (SAB Topic 6.I.7) | http://fasb.org/us-gaap/role/ref/legacyRef | 740 |
| FASB Accounting Standards Codification 740 10 50 9 (b) | http://www.xbrl.org/2003/role/disclosureRef | 740 |
| Part Of Roll Up: |
| us-gaap:IncomeTaxExpenseBenefit |
| us-gaap:DeferredIncomeTaxesAndTaxCredits |