| Standard label: | Guarantor Obligations, Recourse Provisions |
| Name: | us-gaap:GuaranteeObligationsRecourseProvisions |
| Documentation: | Describes the nature of any recourse provisions that would enable the guarantor to recover from third parties any of the amounts paid under the guarantee (or each group of similar guarantees). |
| Object type: | cm:Concept |
| Data type: | Text/String (xbrli:stringItemType) |
| Period type: | For Period (duration) |
| Balance type: | (no balance type) |
| Abstract: | false |
| Workiva Wdesk Taxonomy Analyzer: | us-gaap:GuaranteeObligationsRecourseProvisions |
| Label | Role | Language |
| Guarantor Obligations, Recourse Provisions | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 460 10 50 4 (d) | http://fasb.org/us-gaap/role/ref/legacyRef | 460 |