<?xml version="1.0" encoding="utf-8"?>
<xbrl
  xml:lang="en-US"
  xmlns="http://www.xbrl.org/2003/instance"
  xmlns:dei="http://xbrl.sec.gov/dei/2020-01-31"
  xmlns:link="http://www.xbrl.org/2003/linkbase"
  xmlns:xlink="http://www.w3.org/1999/xlink">
    <link:schemaRef xlink:href="vec-20220124.xsd" xlink:type="simple"/>
    <context id="ie056027f13d54b16bdbdb1f6c35ceb22_D20220124-20220124">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0001601548</identifier>
        </entity>
        <period>
            <startDate>2022-01-24</startDate>
            <endDate>2022-01-24</endDate>
        </period>
    </context>
    <dei:AmendmentFlag
      contextRef="ie056027f13d54b16bdbdb1f6c35ceb22_D20220124-20220124"
      id="id3VybDovL2RvY3MudjEvZG9jOmRlZWY4Yjc5NmE5NDQzMTQ5ODU2N2UzYjMxYzI0MGIyL3NlYzpkZWVmOGI3OTZhOTQ0MzE0OTg1NjdlM2IzMWMyNDBiMl80L2ZyYWc6Yjk2NzVjZGIzYzI3NGFjOGEzZjk2MTEyZjQ0NmQ0NGYvdGFibGU6ZDY3MDJmMzYxOGJkNDc2ODgzYjkyZmVkZGFjYjhkMDEvdGFibGVyYW5nZTpkNjcwMmYzNjE4YmQ0NzY4ODNiOTJmZWRkYWNiOGQwMV8wLTEtMS0xLTI3NzIw_96425882-7d0e-400f-a299-d668e8368d7b">false</dei:AmendmentFlag>
    <dei:EntityCentralIndexKey
      contextRef="ie056027f13d54b16bdbdb1f6c35ceb22_D20220124-20220124"
      id="id3VybDovL2RvY3MudjEvZG9jOmRlZWY4Yjc5NmE5NDQzMTQ5ODU2N2UzYjMxYzI0MGIyL3NlYzpkZWVmOGI3OTZhOTQ0MzE0OTg1NjdlM2IzMWMyNDBiMl80L2ZyYWc6Yjk2NzVjZGIzYzI3NGFjOGEzZjk2MTEyZjQ0NmQ0NGYvdGFibGU6ZDY3MDJmMzYxOGJkNDc2ODgzYjkyZmVkZGFjYjhkMDEvdGFibGVyYW5nZTpkNjcwMmYzNjE4YmQ0NzY4ODNiOTJmZWRkYWNiOGQwMV8xLTEtMS0xLTI3NzIw_ef422c84-e269-4933-b4e2-c7d70499ba59">0001601548</dei:EntityCentralIndexKey>
    <dei:DocumentType
      contextRef="ie056027f13d54b16bdbdb1f6c35ceb22_D20220124-20220124"
      id="id3VybDovL2RvY3MudjEvZG9jOmRlZWY4Yjc5NmE5NDQzMTQ5ODU2N2UzYjMxYzI0MGIyL3NlYzpkZWVmOGI3OTZhOTQ0MzE0OTg1NjdlM2IzMWMyNDBiMl8xL2ZyYWc6YjU0OTJiYWIwYzI0NDI0Y2EwZjQwZjcwYjNhNWZjZDYvdGV4dHJlZ2lvbjpiNTQ5MmJhYjBjMjQ0MjRjYTBmNDBmNzBiM2E1ZmNkNl8zNDE3_ebe6597b-9ba6-4456-aef5-888013d6ffb7">8-K</dei:DocumentType>
    <dei:DocumentPeriodEndDate
      contextRef="ie056027f13d54b16bdbdb1f6c35ceb22_D20220124-20220124"
      id="id3VybDovL2RvY3MudjEvZG9jOmRlZWY4Yjc5NmE5NDQzMTQ5ODU2N2UzYjMxYzI0MGIyL3NlYzpkZWVmOGI3OTZhOTQ0MzE0OTg1NjdlM2IzMWMyNDBiMl8xL2ZyYWc6YjU0OTJiYWIwYzI0NDI0Y2EwZjQwZjcwYjNhNWZjZDYvdGV4dHJlZ2lvbjpiNTQ5MmJhYjBjMjQ0MjRjYTBmNDBmNzBiM2E1ZmNkNl8zNDI1_644f9382-afae-4c15-b85c-339ad76e67f1">2022-01-24</dei:DocumentPeriodEndDate>
    <dei:EntityRegistrantName
      contextRef="ie056027f13d54b16bdbdb1f6c35ceb22_D20220124-20220124"
      id="id3VybDovL2RvY3MudjEvZG9jOmRlZWY4Yjc5NmE5NDQzMTQ5ODU2N2UzYjMxYzI0MGIyL3NlYzpkZWVmOGI3OTZhOTQ0MzE0OTg1NjdlM2IzMWMyNDBiMl8xL2ZyYWc6YjU0OTJiYWIwYzI0NDI0Y2EwZjQwZjcwYjNhNWZjZDYvdGV4dHJlZ2lvbjpiNTQ5MmJhYjBjMjQ0MjRjYTBmNDBmNzBiM2E1ZmNkNl8zNDE4_fc5fcef7-7259-433e-a020-55e7980b18c5">VECTRUS, INC.</dei:EntityRegistrantName>
    <dei:EntityIncorporationStateCountryCode
      contextRef="ie056027f13d54b16bdbdb1f6c35ceb22_D20220124-20220124"
      id="id3VybDovL2RvY3MudjEvZG9jOmRlZWY4Yjc5NmE5NDQzMTQ5ODU2N2UzYjMxYzI0MGIyL3NlYzpkZWVmOGI3OTZhOTQ0MzE0OTg1NjdlM2IzMWMyNDBiMl8xL2ZyYWc6YjU0OTJiYWIwYzI0NDI0Y2EwZjQwZjcwYjNhNWZjZDYvdGFibGU6NTQyMTNkNzFiNTgwNGU0YmI1Zjc3ODg3ZGQwZjBlZGEvdGFibGVyYW5nZTo1NDIxM2Q3MWI1ODA0ZTRiYjVmNzc4ODdkZDBmMGVkYV8wLTAtMS0xLTI3NzIw_960aa206-6d1c-4061-84b0-9739df879a98">IN</dei:EntityIncorporationStateCountryCode>
    <dei:EntityFileNumber
      contextRef="ie056027f13d54b16bdbdb1f6c35ceb22_D20220124-20220124"
      id="id3VybDovL2RvY3MudjEvZG9jOmRlZWY4Yjc5NmE5NDQzMTQ5ODU2N2UzYjMxYzI0MGIyL3NlYzpkZWVmOGI3OTZhOTQ0MzE0OTg1NjdlM2IzMWMyNDBiMl8xL2ZyYWc6YjU0OTJiYWIwYzI0NDI0Y2EwZjQwZjcwYjNhNWZjZDYvdGFibGU6NTQyMTNkNzFiNTgwNGU0YmI1Zjc3ODg3ZGQwZjBlZGEvdGFibGVyYW5nZTo1NDIxM2Q3MWI1ODA0ZTRiYjVmNzc4ODdkZDBmMGVkYV8wLTEtMS0xLTI3NzIw_c178dfd5-c298-4b10-8cf1-bab39b328a4f">001-36341</dei:EntityFileNumber>
    <dei:EntityTaxIdentificationNumber
      contextRef="ie056027f13d54b16bdbdb1f6c35ceb22_D20220124-20220124"
      id="id3VybDovL2RvY3MudjEvZG9jOmRlZWY4Yjc5NmE5NDQzMTQ5ODU2N2UzYjMxYzI0MGIyL3NlYzpkZWVmOGI3OTZhOTQ0MzE0OTg1NjdlM2IzMWMyNDBiMl8xL2ZyYWc6YjU0OTJiYWIwYzI0NDI0Y2EwZjQwZjcwYjNhNWZjZDYvdGFibGU6NTQyMTNkNzFiNTgwNGU0YmI1Zjc3ODg3ZGQwZjBlZGEvdGFibGVyYW5nZTo1NDIxM2Q3MWI1ODA0ZTRiYjVmNzc4ODdkZDBmMGVkYV8wLTItMS0xLTI3NzIw_8c515ff9-02b1-482b-99f7-f138b04260f5">38-3924636</dei:EntityTaxIdentificationNumber>
    <dei:EntityAddressAddressLine1
      contextRef="ie056027f13d54b16bdbdb1f6c35ceb22_D20220124-20220124"
      id="id3VybDovL2RvY3MudjEvZG9jOmRlZWY4Yjc5NmE5NDQzMTQ5ODU2N2UzYjMxYzI0MGIyL3NlYzpkZWVmOGI3OTZhOTQ0MzE0OTg1NjdlM2IzMWMyNDBiMl8xL2ZyYWc6YjU0OTJiYWIwYzI0NDI0Y2EwZjQwZjcwYjNhNWZjZDYvdGV4dHJlZ2lvbjpiNTQ5MmJhYjBjMjQ0MjRjYTBmNDBmNzBiM2E1ZmNkNl8zNDE5_42231489-5485-4172-ac38-932d82eed08e">2424 Garden of the Gods Road</dei:EntityAddressAddressLine1>
    <dei:EntityAddressAddressLine2
      contextRef="ie056027f13d54b16bdbdb1f6c35ceb22_D20220124-20220124"
      id="id3VybDovL2RvY3MudjEvZG9jOmRlZWY4Yjc5NmE5NDQzMTQ5ODU2N2UzYjMxYzI0MGIyL3NlYzpkZWVmOGI3OTZhOTQ0MzE0OTg1NjdlM2IzMWMyNDBiMl8xL2ZyYWc6YjU0OTJiYWIwYzI0NDI0Y2EwZjQwZjcwYjNhNWZjZDYvdGV4dHJlZ2lvbjpiNTQ5MmJhYjBjMjQ0MjRjYTBmNDBmNzBiM2E1ZmNkNl8zNDI2_3d8ceeaf-2f7f-4eaa-9b94-11f51d19c4e4">Suite 300</dei:EntityAddressAddressLine2>
    <dei:EntityAddressCityOrTown
      contextRef="ie056027f13d54b16bdbdb1f6c35ceb22_D20220124-20220124"
      id="id3VybDovL2RvY3MudjEvZG9jOmRlZWY4Yjc5NmE5NDQzMTQ5ODU2N2UzYjMxYzI0MGIyL3NlYzpkZWVmOGI3OTZhOTQ0MzE0OTg1NjdlM2IzMWMyNDBiMl8xL2ZyYWc6YjU0OTJiYWIwYzI0NDI0Y2EwZjQwZjcwYjNhNWZjZDYvdGV4dHJlZ2lvbjpiNTQ5MmJhYjBjMjQ0MjRjYTBmNDBmNzBiM2E1ZmNkNl8zNDIw_370c0a6c-7185-45ce-9290-e5aba4931e51">Colorado Springs</dei:EntityAddressCityOrTown>
    <dei:EntityAddressStateOrProvince
      contextRef="ie056027f13d54b16bdbdb1f6c35ceb22_D20220124-20220124"
      id="id3VybDovL2RvY3MudjEvZG9jOmRlZWY4Yjc5NmE5NDQzMTQ5ODU2N2UzYjMxYzI0MGIyL3NlYzpkZWVmOGI3OTZhOTQ0MzE0OTg1NjdlM2IzMWMyNDBiMl8xL2ZyYWc6YjU0OTJiYWIwYzI0NDI0Y2EwZjQwZjcwYjNhNWZjZDYvdGV4dHJlZ2lvbjpiNTQ5MmJhYjBjMjQ0MjRjYTBmNDBmNzBiM2E1ZmNkNl8zNDIx_9792ba94-6783-4370-b189-bcef98e14001">CO</dei:EntityAddressStateOrProvince>
    <dei:EntityAddressPostalZipCode
      contextRef="ie056027f13d54b16bdbdb1f6c35ceb22_D20220124-20220124"
      id="id3VybDovL2RvY3MudjEvZG9jOmRlZWY4Yjc5NmE5NDQzMTQ5ODU2N2UzYjMxYzI0MGIyL3NlYzpkZWVmOGI3OTZhOTQ0MzE0OTg1NjdlM2IzMWMyNDBiMl8xL2ZyYWc6YjU0OTJiYWIwYzI0NDI0Y2EwZjQwZjcwYjNhNWZjZDYvdGV4dHJlZ2lvbjpiNTQ5MmJhYjBjMjQ0MjRjYTBmNDBmNzBiM2E1ZmNkNl8zNDI4_a8859db0-2a6b-481c-9207-fb853b09fb0a">80919</dei:EntityAddressPostalZipCode>
    <dei:CityAreaCode
      contextRef="ie056027f13d54b16bdbdb1f6c35ceb22_D20220124-20220124"
      id="id3VybDovL2RvY3MudjEvZG9jOmRlZWY4Yjc5NmE5NDQzMTQ5ODU2N2UzYjMxYzI0MGIyL3NlYzpkZWVmOGI3OTZhOTQ0MzE0OTg1NjdlM2IzMWMyNDBiMl8xL2ZyYWc6YjU0OTJiYWIwYzI0NDI0Y2EwZjQwZjcwYjNhNWZjZDYvdGV4dHJlZ2lvbjpiNTQ5MmJhYjBjMjQ0MjRjYTBmNDBmNzBiM2E1ZmNkNl8zNDI3_bd2b6b09-4bbb-413b-b0e8-b3fca72a99a2">719</dei:CityAreaCode>
    <dei:LocalPhoneNumber
      contextRef="ie056027f13d54b16bdbdb1f6c35ceb22_D20220124-20220124"
      id="id3VybDovL2RvY3MudjEvZG9jOmRlZWY4Yjc5NmE5NDQzMTQ5ODU2N2UzYjMxYzI0MGIyL3NlYzpkZWVmOGI3OTZhOTQ0MzE0OTg1NjdlM2IzMWMyNDBiMl8xL2ZyYWc6YjU0OTJiYWIwYzI0NDI0Y2EwZjQwZjcwYjNhNWZjZDYvdGV4dHJlZ2lvbjpiNTQ5MmJhYjBjMjQ0MjRjYTBmNDBmNzBiM2E1ZmNkNl8zNDMw_7f808937-6303-4b4f-b0db-c536a81a40eb">591-3600</dei:LocalPhoneNumber>
    <dei:Security12bTitle
      contextRef="ie056027f13d54b16bdbdb1f6c35ceb22_D20220124-20220124"
      id="id3VybDovL2RvY3MudjEvZG9jOmRlZWY4Yjc5NmE5NDQzMTQ5ODU2N2UzYjMxYzI0MGIyL3NlYzpkZWVmOGI3OTZhOTQ0MzE0OTg1NjdlM2IzMWMyNDBiMl8xL2ZyYWc6YjU0OTJiYWIwYzI0NDI0Y2EwZjQwZjcwYjNhNWZjZDYvdGFibGU6MTI0ZWU5ZTc3NjY0NGFiM2FlYjJhMTFmYTJiZjA2MGEvdGFibGVyYW5nZToxMjRlZTllNzc2NjQ0YWIzYWViMmExMWZhMmJmMDYwYV8xLTAtMS0xLTI3NzIw_2c865391-5782-45d2-bfa7-74bc40d50250">Common Stock, Par Value $0.01 Per Share</dei:Security12bTitle>
    <dei:TradingSymbol
      contextRef="ie056027f13d54b16bdbdb1f6c35ceb22_D20220124-20220124"
      id="id3VybDovL2RvY3MudjEvZG9jOmRlZWY4Yjc5NmE5NDQzMTQ5ODU2N2UzYjMxYzI0MGIyL3NlYzpkZWVmOGI3OTZhOTQ0MzE0OTg1NjdlM2IzMWMyNDBiMl8xL2ZyYWc6YjU0OTJiYWIwYzI0NDI0Y2EwZjQwZjcwYjNhNWZjZDYvdGFibGU6MTI0ZWU5ZTc3NjY0NGFiM2FlYjJhMTFmYTJiZjA2MGEvdGFibGVyYW5nZToxMjRlZTllNzc2NjQ0YWIzYWViMmExMWZhMmJmMDYwYV8xLTEtMS0xLTI3NzIw_7575522f-ed7e-4c2f-8d9e-fa3ae5ed938c">VEC</dei:TradingSymbol>
    <dei:SecurityExchangeName
      contextRef="ie056027f13d54b16bdbdb1f6c35ceb22_D20220124-20220124"
      id="id3VybDovL2RvY3MudjEvZG9jOmRlZWY4Yjc5NmE5NDQzMTQ5ODU2N2UzYjMxYzI0MGIyL3NlYzpkZWVmOGI3OTZhOTQ0MzE0OTg1NjdlM2IzMWMyNDBiMl8xL2ZyYWc6YjU0OTJiYWIwYzI0NDI0Y2EwZjQwZjcwYjNhNWZjZDYvdGFibGU6MTI0ZWU5ZTc3NjY0NGFiM2FlYjJhMTFmYTJiZjA2MGEvdGFibGVyYW5nZToxMjRlZTllNzc2NjQ0YWIzYWViMmExMWZhMmJmMDYwYV8xLTItMS0xLTI3NzIw_a1f717f7-cf84-408d-9f63-8f3609868782">NYSE</dei:SecurityExchangeName>
    <dei:WrittenCommunications
      contextRef="ie056027f13d54b16bdbdb1f6c35ceb22_D20220124-20220124"
      id="id3VybDovL2RvY3MudjEvZG9jOmRlZWY4Yjc5NmE5NDQzMTQ5ODU2N2UzYjMxYzI0MGIyL3NlYzpkZWVmOGI3OTZhOTQ0MzE0OTg1NjdlM2IzMWMyNDBiMl8xL2ZyYWc6YjU0OTJiYWIwYzI0NDI0Y2EwZjQwZjcwYjNhNWZjZDYvdGV4dHJlZ2lvbjpiNTQ5MmJhYjBjMjQ0MjRjYTBmNDBmNzBiM2E1ZmNkNl8zNDMx_3567daf7-afff-447e-ac77-cf7201f03ac7">false</dei:WrittenCommunications>
    <dei:SolicitingMaterial
      contextRef="ie056027f13d54b16bdbdb1f6c35ceb22_D20220124-20220124"
      id="id3VybDovL2RvY3MudjEvZG9jOmRlZWY4Yjc5NmE5NDQzMTQ5ODU2N2UzYjMxYzI0MGIyL3NlYzpkZWVmOGI3OTZhOTQ0MzE0OTg1NjdlM2IzMWMyNDBiMl8xL2ZyYWc6YjU0OTJiYWIwYzI0NDI0Y2EwZjQwZjcwYjNhNWZjZDYvdGV4dHJlZ2lvbjpiNTQ5MmJhYjBjMjQ0MjRjYTBmNDBmNzBiM2E1ZmNkNl8zNDIy_5913cba3-ceeb-49cd-ae3f-b49a5a43c0fb">false</dei:SolicitingMaterial>
    <dei:PreCommencementTenderOffer
      contextRef="ie056027f13d54b16bdbdb1f6c35ceb22_D20220124-20220124"
      id="id3VybDovL2RvY3MudjEvZG9jOmRlZWY4Yjc5NmE5NDQzMTQ5ODU2N2UzYjMxYzI0MGIyL3NlYzpkZWVmOGI3OTZhOTQ0MzE0OTg1NjdlM2IzMWMyNDBiMl8xL2ZyYWc6YjU0OTJiYWIwYzI0NDI0Y2EwZjQwZjcwYjNhNWZjZDYvdGV4dHJlZ2lvbjpiNTQ5MmJhYjBjMjQ0MjRjYTBmNDBmNzBiM2E1ZmNkNl8zNDIz_fb8c5eb0-bddb-4732-bd91-3d5c19827dc8">false</dei:PreCommencementTenderOffer>
    <dei:PreCommencementIssuerTenderOffer
      contextRef="ie056027f13d54b16bdbdb1f6c35ceb22_D20220124-20220124"
      id="id3VybDovL2RvY3MudjEvZG9jOmRlZWY4Yjc5NmE5NDQzMTQ5ODU2N2UzYjMxYzI0MGIyL3NlYzpkZWVmOGI3OTZhOTQ0MzE0OTg1NjdlM2IzMWMyNDBiMl8xL2ZyYWc6YjU0OTJiYWIwYzI0NDI0Y2EwZjQwZjcwYjNhNWZjZDYvdGV4dHJlZ2lvbjpiNTQ5MmJhYjBjMjQ0MjRjYTBmNDBmNzBiM2E1ZmNkNl8zNDI5_048765d4-ef08-4d8a-a482-9f6f88f87299">false</dei:PreCommencementIssuerTenderOffer>
    <dei:EntityEmergingGrowthCompany
      contextRef="ie056027f13d54b16bdbdb1f6c35ceb22_D20220124-20220124"
      id="id3VybDovL2RvY3MudjEvZG9jOmRlZWY4Yjc5NmE5NDQzMTQ5ODU2N2UzYjMxYzI0MGIyL3NlYzpkZWVmOGI3OTZhOTQ0MzE0OTg1NjdlM2IzMWMyNDBiMl8xL2ZyYWc6YjU0OTJiYWIwYzI0NDI0Y2EwZjQwZjcwYjNhNWZjZDYvdGV4dHJlZ2lvbjpiNTQ5MmJhYjBjMjQ0MjRjYTBmNDBmNzBiM2E1ZmNkNl8zNDI0_1a160188-4f7c-4d2f-9d23-60eb46741ae4">false</dei:EntityEmergingGrowthCompany>
</xbrl>
