| Standard label: | Effective Income Tax Rate Reconciliation, Other Reconciling Items, Amount |
| Name: | us-gaap:IncomeTaxReconciliationOtherReconcilingItems |
| Documentation: | Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to tax exempt income, equity in earnings (loss) of an unconsolidated subsidiary, minority noncontrolling interest income (loss), tax holiday, disposition of a business, disposition of an asset, repatriation of foreign earnings, repatriation of foreign earnings jobs creation act of 2004, increase (decrease) in enacted tax rate, prior year income taxes, increase (decrease) in deferred tax asset valuation allowance, and other adjustments. |
| 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:IncomeTaxReconciliationOtherReconcilingItems |
| Label | Role | Language |
| Effective Income Tax Rate Reconciliation, Other Reconciling Items, Amount | http://www.xbrl.org/2003/role/label | en-US |
| Effective Income Tax Rate Reconciliation, Other Reconciling Items, Amount, Total | http://www.xbrl.org/2003/role/totalLabel | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 740 10 50 12 | http://fasb.org/us-gaap/role/ref/legacyRef | 740 |
| FASB Accounting Standards Codification 740 10 50 13 | http://fasb.org/us-gaap/role/ref/legacyRef | 740 |
| Part Of Roll Up: |
| us-gaap:IncomeTaxExpenseBenefit |