| Standard label: | Defined Benefit Plan, Benefit Obligation, Increase (Decrease) for Other Change |
| Name: | us-gaap:DefinedBenefitPlanOtherChanges |
| Documentation: | Amount of increase (decrease) in benefit obligation of defined benefit plan from change, classified as other. |
| Object type: | cm:Concept |
| Data type: | Monetary (xbrli:monetaryItemType) |
| Period type: | For Period (duration) |
| Balance type: | Credit |
| Abstract: | false |
| Workiva Wdesk Taxonomy Analyzer: | us-gaap:DefinedBenefitPlanOtherChanges |
| Label | Role | Language |
| Defined Benefit Plan, Benefit Obligation, Increase (Decrease) for Other Change | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |
| Part Of Roll Up: |
| us-gaap:DefinedBenefitPlanBenefitObligationPeriodIncreaseDecrease |