| Standard label: | Defined Benefit Plan, Type [Extensible List] |
| Name: | us-gaap:DefinedBenefitPlanTypeExtensibleList |
| Documentation: | Indicates type of defined benefit plan. Includes, but is not limited to, pension plan, other postretirement plan and special and contractual termination benefits payable upon retirement. |
| Object type: | cm:Concept |
| Data type: | srt-types:extensibleListItemType |
| Period type: | As Of (instant) |
| Balance type: | (no balance type) |
| Abstract: | false |
| Workiva Wdesk Taxonomy Analyzer: | us-gaap:DefinedBenefitPlanTypeExtensibleList |
| Label | Role | Language |
| Defined Benefit Plan, Type [Extensible List] | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 712 10 15 4 (c) | http://fasb.org/us-gaap/role/ref/legacyRef | 712 |
| FASB Accounting Standards Codification 712 10 15 4 (d) | http://fasb.org/us-gaap/role/ref/legacyRef | 712 |
| FASB Accounting Standards Codification 715 20 50 1 | http://fasb.org/us-gaap/role/ref/legacyRef | 715 |
| FASB Accounting Standards Codification 715 20 50 2 | http://fasb.org/us-gaap/role/ref/legacyRef | 715 |