| Standard label: | Guarantees [Member] |
| Name: | us-gaap:GuaranteesMember |
| Documentation: | A guaranty by which one person assumes responsibility for paying another's debts or fulfilling another's responsibilities; or a promise, pledge, assurance, especially one given in writing, that attests: (a) to the quality or durability of a product or service; (b) that something will be performed in a specified manner; or (c) that execution, completion, or existence of something is as represented or stipulated by agreement. |
| Object type: | cm:Member |
| Data type: | [Member] (nonnum:domainItemType) |
| Period type: | For Period (duration) |
| Balance type: | (no balance type) |
| Abstract: | true |
| Workiva Wdesk Taxonomy Analyzer: | us-gaap:GuaranteesMember |
| Label | Role | Language |
| Guarantees [Member] | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 606 10 55 91 (a) | http://www.xbrl.org/2009/role/commonPracticeRef | 606 |