| Standard label: | Defined Benefit Plan, Plan Assets, Allocation [Table] |
| Name: | us-gaap:DefinedBenefitPlanPlanAssetsAllocationTable |
| Documentation: | Disclosure of information about investment allocation of defined benefit plan assets. Includes, but is not limited to, investment allocation percentage or range of percentages. |
| Object type: | cm:Table |
| Data type: | Text/String (xbrli:stringItemType) |
| Period type: | For Period (duration) |
| Balance type: | (no balance type) |
| Abstract: | true |
| Workiva Wdesk Taxonomy Analyzer: | us-gaap:DefinedBenefitPlanPlanAssetsAllocationTable |
| Label | Role | Language |
| Defined Benefit Plan, Plan Assets, Allocation [Table] | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 715 20 50 1 (d)(i) | http://www.xbrl.org/2009/role/commonPracticeRef | 715 |