| Standard label: | Variable Interest Entity, Qualitative or Quantitative Information, Purpose of VIE |
| Name: | us-gaap:VariableInterestEntityVIEPurposeOfVIE |
| Documentation: | The overall reason that the Variable Interest Entity (VIE) was formed. For example, the VIE was formed to hold financial assets, including loans or receivables, real estate or other property or to engage in research and development or other activities on behalf of another company. |
| 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:VariableInterestEntityVIEPurposeOfVIE |
| Label | Role | Language |
| Variable Interest Entity, Qualitative or Quantitative Information, Purpose of VIE | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 810 10 50 5A (d) | http://fasb.org/us-gaap/role/ref/legacyRef | 810 |
| FASB Accounting Standards Codification 810 10 50 4 (b) | http://fasb.org/us-gaap/role/ref/legacyRef | 810 |
| FASB Accounting Standards Codification 810 10 50 6 (b) | http://fasb.org/us-gaap/role/ref/legacyRef | 810 |
| FASB Accounting Standards Codification 810 10 50 6 b | http://fasb.org/us-gaap/role/ref/legacyRef | 810 |
| FASB Accounting Standards Codification 810 10 50 16 (c,d) | http://fasb.org/us-gaap/role/ref/legacyRef | 810 |