| Standard label: | Provision for Loss on Contracts |
| Name: | us-gaap:ProvisionForLossOnContracts |
| Documentation: | Cumulative provision for contract losses not offset against related costs accumulated on the balance sheet. |
| Object type: | cm:Concept |
| Data type: | Monetary (xbrli:monetaryItemType) |
| Period type: | As Of (instant) |
| Balance type: | Credit |
| Abstract: | false |
| Workiva Wdesk Taxonomy Analyzer: | us-gaap:ProvisionForLossOnContracts |
| Label | Role | Language |
| Provision for Loss on Contracts | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 605 35 45 2 | http://fasb.org/us-gaap/role/ref/legacyRef | 605 |
| Part Of Roll Up: |
| us-gaap:LiabilitiesCurrent |