| Standard label: | Extinguishment of Debt, Gain (Loss), Net of Tax |
| Name: | us-gaap:ExtinguishmentOfDebtGainLossNetOfTax |
| Documentation: | The difference between the reacquisition price and the net carrying amount of the extinguished debt recognized currently as a component of income in the period of extinguishment, net of tax. |
| 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:ExtinguishmentOfDebtGainLossNetOfTax |
| Label | Role | Language |
| Extinguishment of Debt, Gain (Loss), Net of Tax | http://www.xbrl.org/2003/role/label | en-US |
| Extinguishment of Debt, Gain (Loss), Net of Tax, Total | http://www.xbrl.org/2003/role/totalLabel | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 470 50 40 2 | http://fasb.org/us-gaap/role/ref/legacyRef | 470 |