<?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/2021"
  xmlns:link="http://www.xbrl.org/2003/linkbase"
  xmlns:xlink="http://www.w3.org/1999/xlink">
    <link:schemaRef xlink:href="dnb-20220616.xsd" xlink:type="simple"/>
    <context id="i8a3976ceb28940c589e9bb8d8780b9cf_D20220616-20220616">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0001799208</identifier>
        </entity>
        <period>
            <startDate>2022-06-16</startDate>
            <endDate>2022-06-16</endDate>
        </period>
    </context>
    <dei:AmendmentFlag
      contextRef="i8a3976ceb28940c589e9bb8d8780b9cf_D20220616-20220616"
      id="id3VybDovL2RvY3MudjEvZG9jOjUwNDUyYWYyZWJlNTQ5YjM4YmUyZmMxZjg3ODlkNWI2L3NlYzo1MDQ1MmFmMmViZTU0OWIzOGJlMmZjMWY4Nzg5ZDViNl80L2ZyYWc6MThjZmQ2NjZhOTA0NDhlM2I5ZjUzZTVkZWY1YzRjODAvdGFibGU6ZDRhZWJhODgxODQ1NDVhODkxMWI3M2VlZjNiYmY0MGUvdGFibGVyYW5nZTpkNGFlYmE4ODE4NDU0NWE4OTExYjczZWVmM2JiZjQwZV8yLTEtMS0xLTg5MjM5_f73da55c-cdfe-40d1-97a4-f6b19ae1feec">false</dei:AmendmentFlag>
    <dei:EntityCentralIndexKey
      contextRef="i8a3976ceb28940c589e9bb8d8780b9cf_D20220616-20220616"
      id="id3VybDovL2RvY3MudjEvZG9jOjUwNDUyYWYyZWJlNTQ5YjM4YmUyZmMxZjg3ODlkNWI2L3NlYzo1MDQ1MmFmMmViZTU0OWIzOGJlMmZjMWY4Nzg5ZDViNl80L2ZyYWc6MThjZmQ2NjZhOTA0NDhlM2I5ZjUzZTVkZWY1YzRjODAvdGFibGU6ZDRhZWJhODgxODQ1NDVhODkxMWI3M2VlZjNiYmY0MGUvdGFibGVyYW5nZTpkNGFlYmE4ODE4NDU0NWE4OTExYjczZWVmM2JiZjQwZV8zLTEtMS0xLTg5MjM5_401c7258-ae7f-4689-95a1-54c4f610eb07">0001799208</dei:EntityCentralIndexKey>
    <dei:DocumentType
      contextRef="i8a3976ceb28940c589e9bb8d8780b9cf_D20220616-20220616"
      id="id3VybDovL2RvY3MudjEvZG9jOjUwNDUyYWYyZWJlNTQ5YjM4YmUyZmMxZjg3ODlkNWI2L3NlYzo1MDQ1MmFmMmViZTU0OWIzOGJlMmZjMWY4Nzg5ZDViNl8xL2ZyYWc6Mzk3MzQ3ZGM2NWNjNGFiMzk2ZWQ1ZjA3MjAzNGQ0NmIvdGV4dHJlZ2lvbjozOTczNDdkYzY1Y2M0YWIzOTZlZDVmMDcyMDM0ZDQ2Yl8xNjc4_f19e7cab-b7e1-47e5-99fc-b7eb2f215d75">8-K</dei:DocumentType>
    <dei:DocumentPeriodEndDate
      contextRef="i8a3976ceb28940c589e9bb8d8780b9cf_D20220616-20220616"
      id="id3VybDovL2RvY3MudjEvZG9jOjUwNDUyYWYyZWJlNTQ5YjM4YmUyZmMxZjg3ODlkNWI2L3NlYzo1MDQ1MmFmMmViZTU0OWIzOGJlMmZjMWY4Nzg5ZDViNl8xL2ZyYWc6Mzk3MzQ3ZGM2NWNjNGFiMzk2ZWQ1ZjA3MjAzNGQ0NmIvdGV4dHJlZ2lvbjozOTczNDdkYzY1Y2M0YWIzOTZlZDVmMDcyMDM0ZDQ2Yl8xNzc_32abbadb-138b-42fd-a332-8cab9e4d10d7">2022-06-16</dei:DocumentPeriodEndDate>
    <dei:EntityRegistrantName
      contextRef="i8a3976ceb28940c589e9bb8d8780b9cf_D20220616-20220616"
      id="id3VybDovL2RvY3MudjEvZG9jOjUwNDUyYWYyZWJlNTQ5YjM4YmUyZmMxZjg3ODlkNWI2L3NlYzo1MDQ1MmFmMmViZTU0OWIzOGJlMmZjMWY4Nzg5ZDViNl8xL2ZyYWc6Mzk3MzQ3ZGM2NWNjNGFiMzk2ZWQ1ZjA3MjAzNGQ0NmIvdGV4dHJlZ2lvbjozOTczNDdkYzY1Y2M0YWIzOTZlZDVmMDcyMDM0ZDQ2Yl8xNjc5_99f78af4-172f-45e8-b413-a832c1d30d7e">Dun &amp; Bradstreet Holdings, Inc.</dei:EntityRegistrantName>
    <dei:EntityFileNumber
      contextRef="i8a3976ceb28940c589e9bb8d8780b9cf_D20220616-20220616"
      id="id3VybDovL2RvY3MudjEvZG9jOjUwNDUyYWYyZWJlNTQ5YjM4YmUyZmMxZjg3ODlkNWI2L3NlYzo1MDQ1MmFmMmViZTU0OWIzOGJlMmZjMWY4Nzg5ZDViNl8xL2ZyYWc6Mzk3MzQ3ZGM2NWNjNGFiMzk2ZWQ1ZjA3MjAzNGQ0NmIvdGV4dHJlZ2lvbjozOTczNDdkYzY1Y2M0YWIzOTZlZDVmMDcyMDM0ZDQ2Yl8xNjc0_973f3fd4-6dbb-44cd-a865-7d5743cc82fe">1-39361</dei:EntityFileNumber>
    <dei:EntityIncorporationStateCountryCode
      contextRef="i8a3976ceb28940c589e9bb8d8780b9cf_D20220616-20220616"
      id="id3VybDovL2RvY3MudjEvZG9jOjUwNDUyYWYyZWJlNTQ5YjM4YmUyZmMxZjg3ODlkNWI2L3NlYzo1MDQ1MmFmMmViZTU0OWIzOGJlMmZjMWY4Nzg5ZDViNl8xL2ZyYWc6Mzk3MzQ3ZGM2NWNjNGFiMzk2ZWQ1ZjA3MjAzNGQ0NmIvdGFibGU6ZjU4YzQxYzJmYjQwNGNkZjliNzdiYzU0MDQ3YjllYTEvdGFibGVyYW5nZTpmNThjNDFjMmZiNDA0Y2RmOWI3N2JjNTQwNDdiOWVhMV8wLTAtMS0xLTg5MjM5_2278e2bc-b747-4b25-9d1b-f0a1e5fabaea">DE</dei:EntityIncorporationStateCountryCode>
    <dei:EntityTaxIdentificationNumber
      contextRef="i8a3976ceb28940c589e9bb8d8780b9cf_D20220616-20220616"
      id="id3VybDovL2RvY3MudjEvZG9jOjUwNDUyYWYyZWJlNTQ5YjM4YmUyZmMxZjg3ODlkNWI2L3NlYzo1MDQ1MmFmMmViZTU0OWIzOGJlMmZjMWY4Nzg5ZDViNl8xL2ZyYWc6Mzk3MzQ3ZGM2NWNjNGFiMzk2ZWQ1ZjA3MjAzNGQ0NmIvdGFibGU6ZjU4YzQxYzJmYjQwNGNkZjliNzdiYzU0MDQ3YjllYTEvdGFibGVyYW5nZTpmNThjNDFjMmZiNDA0Y2RmOWI3N2JjNTQwNDdiOWVhMV8wLTEtMS0xLTg5MjM5_8d3b15af-ac6b-4fb3-826c-329e7cef8f33">83-2008699</dei:EntityTaxIdentificationNumber>
    <dei:EntityAddressAddressLine1
      contextRef="i8a3976ceb28940c589e9bb8d8780b9cf_D20220616-20220616"
      id="id3VybDovL2RvY3MudjEvZG9jOjUwNDUyYWYyZWJlNTQ5YjM4YmUyZmMxZjg3ODlkNWI2L3NlYzo1MDQ1MmFmMmViZTU0OWIzOGJlMmZjMWY4Nzg5ZDViNl8xL2ZyYWc6Mzk3MzQ3ZGM2NWNjNGFiMzk2ZWQ1ZjA3MjAzNGQ0NmIvdGV4dHJlZ2lvbjozOTczNDdkYzY1Y2M0YWIzOTZlZDVmMDcyMDM0ZDQ2Yl8xNjgw_b8d86a11-ec50-4290-9913-d6eda2c9caad">5335 Gate Parkway</dei:EntityAddressAddressLine1>
    <dei:EntityAddressCityOrTown
      contextRef="i8a3976ceb28940c589e9bb8d8780b9cf_D20220616-20220616"
      id="id3VybDovL2RvY3MudjEvZG9jOjUwNDUyYWYyZWJlNTQ5YjM4YmUyZmMxZjg3ODlkNWI2L3NlYzo1MDQ1MmFmMmViZTU0OWIzOGJlMmZjMWY4Nzg5ZDViNl8xL2ZyYWc6Mzk3MzQ3ZGM2NWNjNGFiMzk2ZWQ1ZjA3MjAzNGQ0NmIvdGV4dHJlZ2lvbjozOTczNDdkYzY1Y2M0YWIzOTZlZDVmMDcyMDM0ZDQ2Yl8xNjc1_94f5dffd-061d-44a8-a4f6-f5cb2aaf7072">Jacksonville</dei:EntityAddressCityOrTown>
    <dei:EntityAddressStateOrProvince
      contextRef="i8a3976ceb28940c589e9bb8d8780b9cf_D20220616-20220616"
      id="id3VybDovL2RvY3MudjEvZG9jOjUwNDUyYWYyZWJlNTQ5YjM4YmUyZmMxZjg3ODlkNWI2L3NlYzo1MDQ1MmFmMmViZTU0OWIzOGJlMmZjMWY4Nzg5ZDViNl8xL2ZyYWc6Mzk3MzQ3ZGM2NWNjNGFiMzk2ZWQ1ZjA3MjAzNGQ0NmIvdGV4dHJlZ2lvbjozOTczNDdkYzY1Y2M0YWIzOTZlZDVmMDcyMDM0ZDQ2Yl8xNjcx_6fde1981-4069-45aa-89b7-6a0b85faf739">FL</dei:EntityAddressStateOrProvince>
    <dei:EntityAddressPostalZipCode
      contextRef="i8a3976ceb28940c589e9bb8d8780b9cf_D20220616-20220616"
      id="id3VybDovL2RvY3MudjEvZG9jOjUwNDUyYWYyZWJlNTQ5YjM4YmUyZmMxZjg3ODlkNWI2L3NlYzo1MDQ1MmFmMmViZTU0OWIzOGJlMmZjMWY4Nzg5ZDViNl8xL2ZyYWc6Mzk3MzQ3ZGM2NWNjNGFiMzk2ZWQ1ZjA3MjAzNGQ0NmIvdGV4dHJlZ2lvbjozOTczNDdkYzY1Y2M0YWIzOTZlZDVmMDcyMDM0ZDQ2Yl8xNjcy_92ac8cf1-871a-4be7-8fe8-c6680e36ac7f">32256</dei:EntityAddressPostalZipCode>
    <dei:CityAreaCode
      contextRef="i8a3976ceb28940c589e9bb8d8780b9cf_D20220616-20220616"
      id="id3VybDovL2RvY3MudjEvZG9jOjUwNDUyYWYyZWJlNTQ5YjM4YmUyZmMxZjg3ODlkNWI2L3NlYzo1MDQ1MmFmMmViZTU0OWIzOGJlMmZjMWY4Nzg5ZDViNl8xL2ZyYWc6Mzk3MzQ3ZGM2NWNjNGFiMzk2ZWQ1ZjA3MjAzNGQ0NmIvdGV4dHJlZ2lvbjozOTczNDdkYzY1Y2M0YWIzOTZlZDVmMDcyMDM0ZDQ2Yl8xNjgx_a4cd4645-9f06-469a-b4da-208c9eb3425f">904</dei:CityAreaCode>
    <dei:LocalPhoneNumber
      contextRef="i8a3976ceb28940c589e9bb8d8780b9cf_D20220616-20220616"
      id="id3VybDovL2RvY3MudjEvZG9jOjUwNDUyYWYyZWJlNTQ5YjM4YmUyZmMxZjg3ODlkNWI2L3NlYzo1MDQ1MmFmMmViZTU0OWIzOGJlMmZjMWY4Nzg5ZDViNl8xL2ZyYWc6Mzk3MzQ3ZGM2NWNjNGFiMzk2ZWQ1ZjA3MjAzNGQ0NmIvdGV4dHJlZ2lvbjozOTczNDdkYzY1Y2M0YWIzOTZlZDVmMDcyMDM0ZDQ2Yl8xNjg0_0770d9f4-f963-4d9a-98c6-55c5cf412d98">648-6350</dei:LocalPhoneNumber>
    <dei:WrittenCommunications
      contextRef="i8a3976ceb28940c589e9bb8d8780b9cf_D20220616-20220616"
      id="id3VybDovL2RvY3MudjEvZG9jOjUwNDUyYWYyZWJlNTQ5YjM4YmUyZmMxZjg3ODlkNWI2L3NlYzo1MDQ1MmFmMmViZTU0OWIzOGJlMmZjMWY4Nzg5ZDViNl8xL2ZyYWc6Mzk3MzQ3ZGM2NWNjNGFiMzk2ZWQ1ZjA3MjAzNGQ0NmIvdGV4dHJlZ2lvbjozOTczNDdkYzY1Y2M0YWIzOTZlZDVmMDcyMDM0ZDQ2Yl8xNjc2_98ae0b76-8d67-4350-a792-d2d7c9c2d3e0">false</dei:WrittenCommunications>
    <dei:SolicitingMaterial
      contextRef="i8a3976ceb28940c589e9bb8d8780b9cf_D20220616-20220616"
      id="id3VybDovL2RvY3MudjEvZG9jOjUwNDUyYWYyZWJlNTQ5YjM4YmUyZmMxZjg3ODlkNWI2L3NlYzo1MDQ1MmFmMmViZTU0OWIzOGJlMmZjMWY4Nzg5ZDViNl8xL2ZyYWc6Mzk3MzQ3ZGM2NWNjNGFiMzk2ZWQ1ZjA3MjAzNGQ0NmIvdGV4dHJlZ2lvbjozOTczNDdkYzY1Y2M0YWIzOTZlZDVmMDcyMDM0ZDQ2Yl8xNjc3_2b731114-d812-4897-81ef-9e2f530fe7e1">false</dei:SolicitingMaterial>
    <dei:PreCommencementTenderOffer
      contextRef="i8a3976ceb28940c589e9bb8d8780b9cf_D20220616-20220616"
      id="id3VybDovL2RvY3MudjEvZG9jOjUwNDUyYWYyZWJlNTQ5YjM4YmUyZmMxZjg3ODlkNWI2L3NlYzo1MDQ1MmFmMmViZTU0OWIzOGJlMmZjMWY4Nzg5ZDViNl8xL2ZyYWc6Mzk3MzQ3ZGM2NWNjNGFiMzk2ZWQ1ZjA3MjAzNGQ0NmIvdGV4dHJlZ2lvbjozOTczNDdkYzY1Y2M0YWIzOTZlZDVmMDcyMDM0ZDQ2Yl8xNjg1_1cd0293c-3263-4725-97ce-a40a62f29f7b">false</dei:PreCommencementTenderOffer>
    <dei:PreCommencementIssuerTenderOffer
      contextRef="i8a3976ceb28940c589e9bb8d8780b9cf_D20220616-20220616"
      id="id3VybDovL2RvY3MudjEvZG9jOjUwNDUyYWYyZWJlNTQ5YjM4YmUyZmMxZjg3ODlkNWI2L3NlYzo1MDQ1MmFmMmViZTU0OWIzOGJlMmZjMWY4Nzg5ZDViNl8xL2ZyYWc6Mzk3MzQ3ZGM2NWNjNGFiMzk2ZWQ1ZjA3MjAzNGQ0NmIvdGV4dHJlZ2lvbjozOTczNDdkYzY1Y2M0YWIzOTZlZDVmMDcyMDM0ZDQ2Yl8xNjgy_e3b58fad-69df-4f51-bf91-f1a4dd4bac54">false</dei:PreCommencementIssuerTenderOffer>
    <dei:Security12bTitle
      contextRef="i8a3976ceb28940c589e9bb8d8780b9cf_D20220616-20220616"
      id="id3VybDovL2RvY3MudjEvZG9jOjUwNDUyYWYyZWJlNTQ5YjM4YmUyZmMxZjg3ODlkNWI2L3NlYzo1MDQ1MmFmMmViZTU0OWIzOGJlMmZjMWY4Nzg5ZDViNl8xL2ZyYWc6Mzk3MzQ3ZGM2NWNjNGFiMzk2ZWQ1ZjA3MjAzNGQ0NmIvdGFibGU6ZDBkNDA5NDRiNDA1NDE1YmE5MGMxYjYzMjhlOTU3MDcvdGFibGVyYW5nZTpkMGQ0MDk0NGI0MDU0MTViYTkwYzFiNjMyOGU5NTcwN18xLTAtMS0xLTg5MjM5_1d50ccd7-1bdf-4f77-b0c9-3efb4ba0300d">Common Stock, $0.0001 par value</dei:Security12bTitle>
    <dei:TradingSymbol
      contextRef="i8a3976ceb28940c589e9bb8d8780b9cf_D20220616-20220616"
      id="id3VybDovL2RvY3MudjEvZG9jOjUwNDUyYWYyZWJlNTQ5YjM4YmUyZmMxZjg3ODlkNWI2L3NlYzo1MDQ1MmFmMmViZTU0OWIzOGJlMmZjMWY4Nzg5ZDViNl8xL2ZyYWc6Mzk3MzQ3ZGM2NWNjNGFiMzk2ZWQ1ZjA3MjAzNGQ0NmIvdGFibGU6ZDBkNDA5NDRiNDA1NDE1YmE5MGMxYjYzMjhlOTU3MDcvdGFibGVyYW5nZTpkMGQ0MDk0NGI0MDU0MTViYTkwYzFiNjMyOGU5NTcwN18xLTEtMS0xLTg5MjM5_1ada6b16-84f3-4e17-834f-6a55be683a23">DNB</dei:TradingSymbol>
    <dei:SecurityExchangeName
      contextRef="i8a3976ceb28940c589e9bb8d8780b9cf_D20220616-20220616"
      id="id3VybDovL2RvY3MudjEvZG9jOjUwNDUyYWYyZWJlNTQ5YjM4YmUyZmMxZjg3ODlkNWI2L3NlYzo1MDQ1MmFmMmViZTU0OWIzOGJlMmZjMWY4Nzg5ZDViNl8xL2ZyYWc6Mzk3MzQ3ZGM2NWNjNGFiMzk2ZWQ1ZjA3MjAzNGQ0NmIvdGFibGU6ZDBkNDA5NDRiNDA1NDE1YmE5MGMxYjYzMjhlOTU3MDcvdGFibGVyYW5nZTpkMGQ0MDk0NGI0MDU0MTViYTkwYzFiNjMyOGU5NTcwN18xLTItMS0xLTg5MjM5_d7627c51-3bc3-41fe-a372-cfcd4fb2452a">NYSE</dei:SecurityExchangeName>
    <dei:EntityEmergingGrowthCompany
      contextRef="i8a3976ceb28940c589e9bb8d8780b9cf_D20220616-20220616"
      id="id3VybDovL2RvY3MudjEvZG9jOjUwNDUyYWYyZWJlNTQ5YjM4YmUyZmMxZjg3ODlkNWI2L3NlYzo1MDQ1MmFmMmViZTU0OWIzOGJlMmZjMWY4Nzg5ZDViNl8xL2ZyYWc6Mzk3MzQ3ZGM2NWNjNGFiMzk2ZWQ1ZjA3MjAzNGQ0NmIvdGV4dHJlZ2lvbjozOTczNDdkYzY1Y2M0YWIzOTZlZDVmMDcyMDM0ZDQ2Yl8xNjg2_30198b91-236d-4269-9de2-34b95e9a6132">false</dei:EntityEmergingGrowthCompany>
</xbrl>
