| Standard label: | Loss on Contracts |
| Name: | us-gaap:LossOnContracts |
| Documentation: | Losses recognized in the current period on contracts which are expected to generate losses, which are probable and can be reasonably estimated, in a future period. |
| Object type: | cm:Concept |
| Data type: | Monetary (xbrli:monetaryItemType) |
| Period type: | For Period (duration) |
| Balance type: | Debit |
| Abstract: | false |
| Workiva Wdesk Taxonomy Analyzer: | us-gaap:LossOnContracts |
| Label | Role | Language |
| Loss on Contracts | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 220 10 S99 2 (SX 210.5-03.2) | http://fasb.org/us-gaap/role/ref/legacyRef | 220 |
| FASB Accounting Standards Codification 605 35 45 1 | http://www.xbrl.org/2003/role/disclosureRef | 605 |
| Part Of Roll Up: |
| us-gaap:CostOfGoodsAndServiceExcludingDepreciationDepletionAndAmortization |