| Standard label: | Guarantor Obligations, Origin and Purpose |
| Name: | us-gaap:GuaranteeObligationsOriginAndPurpose |
| Documentation: | Describes how and under what circumstances or in connection with which transaction the guarantee or each group of similar guarantees was given and the objective of the guarantee. |
| 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:GuaranteeObligationsOriginAndPurpose |
| Label | Role | Language |
| Guarantor Obligations, Origin and Purpose | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 460 10 50 4 (a)(2) | http://www.xbrl.org/2003/role/disclosureRef | 460 |