| Name | AdvancesReceivedOnGovernmentContractsNotNettedAgainstAccountsReceivable |
|---|---|
| Namespace | http://fasb.org/us-gaap/2020-01-31 |
| Prefix | us-gaap |
| Data type | xbrli:monetaryItemType |
| Period type | instant |
| Substitution Group | xbrli:item |
| Balance | credit |
| Nillable | True |
| Abstract | False |
| Text | Lang | Role | Container role |
|---|---|---|---|
| Advances received on government contracts that are not offset against receivables because they cannot be definitely regarded as payments on account for contract work in progress. | en-US | http://www.xbrl.org/2003/role/documentation | http://www.xbrl.org/2003/role/link |
| Advances Received on Government Contracts, Not Netted Against Accounts Receivable | en-US | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |