| Standard label: | Fair Value, Option, Reasons for Election |
| Name: | us-gaap:FairValueOptionReasonsForElection |
| Documentation: | This item represents a narrative discussing management's reasons for electing a fair value option for each eligible item or group of similar eligible items as of the date of the statement of financial position. |
| 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:FairValueOptionReasonsForElection |
| Label | Role | Language |
| Fair Value, Option, Reasons for Election | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 810 10 65 7 (d)(1) | http://fasb.org/us-gaap/role/ref/legacyRef | 810 |
| FASB Accounting Standards Codification 825 10 50 28 (a) | http://fasb.org/us-gaap/role/ref/legacyRef | 825 |