| Standard label: | Defined Benefit Plan, Plan Assets, Accounting Policy Election, Measurement Date |
| Name: | us-gaap:DefinedBenefitPlanAccountingPolicyElectionMeasurementDate |
| Documentation: | Month-end measurement date applicable when an accounting policy election is made to measure plan assets and benefit obligations as of the month-end that is closest to the fiscal year-end, in CCYY-MM-DD format. |
| Object type: | cm:Concept |
| Data type: | Date (xbrli:dateItemType) |
| Period type: | For Period (duration) |
| Balance type: | (no balance type) |
| Abstract: | false |
| Workiva Wdesk Taxonomy Analyzer: | us-gaap:DefinedBenefitPlanAccountingPolicyElectionMeasurementDate |
| Label | Role | Language |
| Defined Benefit Plan, Plan Assets, Accounting Policy Election, Measurement Date | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 715 20 50 1 (u) | http://www.xbrl.org/2003/role/disclosureRef | 715 |