| Standard label: | Health Care Trust Fund, Description |
| Name: | us-gaap:HealthCareTrustFundDescription |
| Documentation: | Description of the health care trust fund including whether it is revocable or irrevocable, the type of assets included and the name of the trust. |
| 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:HealthCareTrustFundDescription |
| Label | Role | Language |
| Health Care Trust Fund, Description | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 954 810 50 1 | http://fasb.org/us-gaap/role/ref/legacyRef | 954 |
| FASB Accounting Standards Codification 954 810 45 4 | http://fasb.org/us-gaap/role/ref/legacyRef | 954 |