| Standard label: | Inventory, Parts and Components, Net of Reserves |
| Name: | us-gaap:InventoryPartsAndComponentsNetOfReserves |
| Documentation: | Carrying amount, net of valuation reserves and adjustments, as of the balance sheet date for elements of machinery or equipment held for the purpose of replacing similar parts in the course of repair or maintenance. |
| Object type: | cm:Concept |
| Data type: | Monetary (xbrli:monetaryItemType) |
| Period type: | As Of (instant) |
| Balance type: | Debit |
| Abstract: | false |
| Workiva Wdesk Taxonomy Analyzer: | us-gaap:InventoryPartsAndComponentsNetOfReserves |
| Label | Role | Language |
| Inventory, Parts and Components, Net of Reserves | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 210 10 S99 1 (SX 210.5-02.6(a)) | http://fasb.org/us-gaap/role/ref/legacyRef | 210 |
| FASB Accounting Standards Codification 330 10 S99 2 (SAB TOPIC 5.BB) | http://fasb.org/us-gaap/role/ref/legacyRef | 330 |
| Part Of Roll Up: |
| us-gaap:InventoryRawMaterialsAndPurchasedPartsNetOfReserves |