<?xml version='1.0' encoding='utf-8'?>
<FilingSummary>
  <Version>3.21.4</Version>
  <ProcessingTime/>
  <ReportFormat>html</ReportFormat>
  <ContextCount>647</ContextCount>
  <ElementCount>694</ElementCount>
  <EntityCount>1</EntityCount>
  <FootnotesReported>true</FootnotesReported>
  <SegmentCount>120</SegmentCount>
  <ScenarioCount>0</ScenarioCount>
  <TuplesReported>false</TuplesReported>
  <UnitCount>8</UnitCount>
  <MyReports>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R1.htm</HtmlFileName>
      <LongName>1100090 - Document - Document and Entity Information</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DocumentDocumentAndEntityInformation</Role>
      <ShortName>Document and Entity Information</ShortName>
      <MenuCategory>Cover</MenuCategory>
      <Position>1</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R2.htm</HtmlFileName>
      <LongName>1100100 - Statement - CONDENSED CONSOLIDATED BALANCE SHEETS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/StatementCondensedConsolidatedBalanceSheets</Role>
      <ShortName>CONDENSED CONSOLIDATED BALANCE SHEETS</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>2</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R3.htm</HtmlFileName>
      <LongName>1100105 - Statement - CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/StatementCondensedConsolidatedBalanceSheetsParenthetical</Role>
      <ShortName>CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>3</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R4.htm</HtmlFileName>
      <LongName>1100200 - Statement - UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/StatementUnauditedCondensedConsolidatedStatementsOfOperations</Role>
      <ShortName>UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>4</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R5.htm</HtmlFileName>
      <LongName>1100205 - Statement - CONDENSED STATEMENTS OF OPERATIONS (Parenthetical)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/StatementCondensedStatementsOfOperationsParenthetical</Role>
      <ShortName>CONDENSED STATEMENTS OF OPERATIONS (Parenthetical)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>5</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R6.htm</HtmlFileName>
      <LongName>1100300 - Statement - UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/StatementUnauditedCondensedConsolidatedStatementsOfChangesInStockholdersEquity</Role>
      <ShortName>UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>6</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R7.htm</HtmlFileName>
      <LongName>1100305 - Statement - UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (Parenthetical)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/StatementUnauditedCondensedConsolidatedStatementsOfChangesInStockholdersEquityParenthetical</Role>
      <ShortName>UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (Parenthetical)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>7</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R8.htm</HtmlFileName>
      <LongName>1100400 - Statement - UNAUDITED CONDENSED CONSOLIDATED STATEMENT OF CASH FLOWS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/StatementUnauditedCondensedConsolidatedStatementOfCashFlows</Role>
      <ShortName>UNAUDITED CONDENSED CONSOLIDATED STATEMENT OF CASH FLOWS</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>8</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R9.htm</HtmlFileName>
      <LongName>1110101 - Disclosure - Description of Organization and Business Operations</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureDescriptionOfOrganizationAndBusinessOperations</Role>
      <ShortName>Description of Organization and Business Operations</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>9</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R10.htm</HtmlFileName>
      <LongName>1110201 - Disclosure - Basis of Presentation and Summary of Significant Accounting Policies</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureBasisOfPresentationAndSummaryOfSignificantAccountingPolicies</Role>
      <ShortName>Basis of Presentation and Summary of Significant Accounting Policies</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>10</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R11.htm</HtmlFileName>
      <LongName>1110301 - Disclosure - Initial Public Offering</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureInitialPublicOffering</Role>
      <ShortName>Initial Public Offering</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>11</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R12.htm</HtmlFileName>
      <LongName>1110401 - Disclosure - Related Party Transactions</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureRelatedPartyTransactions</Role>
      <ShortName>Related Party Transactions</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>12</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R13.htm</HtmlFileName>
      <LongName>1110501 - Disclosure - Commitments &amp; Contingencies</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureCommitmentsContingencies</Role>
      <ShortName>Commitments &amp; Contingencies</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>13</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R14.htm</HtmlFileName>
      <LongName>1110601 - Disclosure - Warrants</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureWarrants</Role>
      <ShortName>Warrants</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>14</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R15.htm</HtmlFileName>
      <LongName>1110701 - Disclosure - Class A Common Stock Subject to Possible Redemption</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureClassCommonStockSubjectToPossibleRedemption</Role>
      <ShortName>Class A Common Stock Subject to Possible Redemption</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>15</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R16.htm</HtmlFileName>
      <LongName>1110801 - Disclosure - Stockholders' Equity (Deficit)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureStockholdersEquityDeficit</Role>
      <ShortName>Stockholders' Equity (Deficit)</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>16</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R17.htm</HtmlFileName>
      <LongName>1110901 - Disclosure - Fair Value Measurements</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureFairValueMeasurements</Role>
      <ShortName>Fair Value Measurements</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>17</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R18.htm</HtmlFileName>
      <LongName>1111001 - Disclosure - Subsequent Events</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureSubsequentEvents</Role>
      <ShortName>Subsequent Events</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>18</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R19.htm</HtmlFileName>
      <LongName>1120202 - Disclosure - Basis of Presentation and Summary of Significant Accounting Policies (Policies)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesPolicies</Role>
      <ShortName>Basis of Presentation and Summary of Significant Accounting Policies (Policies)</ShortName>
      <MenuCategory>Policies</MenuCategory>
      <ParentRole>http://www.buzzfeed.com/role/DisclosureBasisOfPresentationAndSummaryOfSignificantAccountingPolicies</ParentRole>
      <Position>19</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R20.htm</HtmlFileName>
      <LongName>1130203 - Disclosure - Basis of Presentation and Summary of Significant Accounting Policies (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesTables</Role>
      <ShortName>Basis of Presentation and Summary of Significant Accounting Policies (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.buzzfeed.com/role/DisclosureBasisOfPresentationAndSummaryOfSignificantAccountingPolicies</ParentRole>
      <Position>20</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R21.htm</HtmlFileName>
      <LongName>1130703 - Disclosure - Class A Common Stock Subject to Possible Redemption (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureClassCommonStockSubjectToPossibleRedemptionTables</Role>
      <ShortName>Class A Common Stock Subject to Possible Redemption (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.buzzfeed.com/role/DisclosureClassCommonStockSubjectToPossibleRedemption</ParentRole>
      <Position>21</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R22.htm</HtmlFileName>
      <LongName>1130903 - Disclosure - Fair Value Measurements (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureFairValueMeasurementsTables</Role>
      <ShortName>Fair Value Measurements (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.buzzfeed.com/role/DisclosureFairValueMeasurements</ParentRole>
      <Position>22</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R23.htm</HtmlFileName>
      <LongName>1140101 - Disclosure - Description of Organization and Business Operations (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureDescriptionOfOrganizationAndBusinessOperationsDetails</Role>
      <ShortName>Description of Organization and Business Operations (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.buzzfeed.com/role/DisclosureDescriptionOfOrganizationAndBusinessOperations</ParentRole>
      <Position>23</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R24.htm</HtmlFileName>
      <LongName>1140201 - Disclosure - Basis of Presentation and Summary of Significant Accounting Policies (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesDetails</Role>
      <ShortName>Basis of Presentation and Summary of Significant Accounting Policies (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.buzzfeed.com/role/DisclosureBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesTables</ParentRole>
      <Position>24</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R25.htm</HtmlFileName>
      <LongName>1140202 - Disclosure - Basis of Presentation and Summary of Significant Accounting Policies - Restatement of the financial statements (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesRestatementOfFinancialStatementsDetails</Role>
      <ShortName>Basis of Presentation and Summary of Significant Accounting Policies - Restatement of the financial statements (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>25</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R26.htm</HtmlFileName>
      <LongName>1140203 - Disclosure - Basis of Presentation and Summary of Significant Accounting Policies - Reconciliation of Net Loss per Common Share (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesReconciliationOfNetLossPerCommonShareDetails</Role>
      <ShortName>Basis of Presentation and Summary of Significant Accounting Policies - Reconciliation of Net Loss per Common Share (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>26</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R27.htm</HtmlFileName>
      <LongName>1140301 - Disclosure - Initial Public Offering (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureInitialPublicOfferingDetails</Role>
      <ShortName>Initial Public Offering (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.buzzfeed.com/role/DisclosureInitialPublicOffering</ParentRole>
      <Position>27</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R28.htm</HtmlFileName>
      <LongName>1140401 - Disclosure - Related Party Transactions - Founder Shares (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureRelatedPartyTransactionsFounderSharesDetails</Role>
      <ShortName>Related Party Transactions - Founder Shares (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>28</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R29.htm</HtmlFileName>
      <LongName>1140402 - Disclosure - Related Party Transactions - Additional Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureRelatedPartyTransactionsAdditionalInformationDetails</Role>
      <ShortName>Related Party Transactions - Additional Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>29</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R30.htm</HtmlFileName>
      <LongName>1140501 - Disclosure - Commitments &amp; Contingencies (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureCommitmentsContingenciesDetails</Role>
      <ShortName>Commitments &amp; Contingencies (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.buzzfeed.com/role/DisclosureCommitmentsContingencies</ParentRole>
      <Position>30</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R31.htm</HtmlFileName>
      <LongName>1140601 - Disclosure - Warrants (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureWarrantsDetails</Role>
      <ShortName>Warrants (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.buzzfeed.com/role/DisclosureWarrants</ParentRole>
      <Position>31</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R32.htm</HtmlFileName>
      <LongName>1140701 - Disclosure - Class A Common Stock Subject to Possible Redemption (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureClassCommonStockSubjectToPossibleRedemptionDetails</Role>
      <ShortName>Class A Common Stock Subject to Possible Redemption (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.buzzfeed.com/role/DisclosureClassCommonStockSubjectToPossibleRedemptionTables</ParentRole>
      <Position>32</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R33.htm</HtmlFileName>
      <LongName>1140801 - Disclosure - Stockholders' Equity (Deficit) - Preferred Stock Shares (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureStockholdersEquityDeficitPreferredStockSharesDetails</Role>
      <ShortName>Stockholders' Equity (Deficit) - Preferred Stock Shares (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.buzzfeed.com/role/DisclosureStockholdersEquityDeficit</ParentRole>
      <Position>33</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R34.htm</HtmlFileName>
      <LongName>1140802 - Disclosure - Stockholders' Equity (Deficit) - Common Stock Shares (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureStockholdersEquityDeficitCommonStockSharesDetails</Role>
      <ShortName>Stockholders' Equity (Deficit) - Common Stock Shares (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.buzzfeed.com/role/DisclosureStockholdersEquityDeficit</ParentRole>
      <Position>34</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R35.htm</HtmlFileName>
      <LongName>1140803 - Disclosure - Stockholders' Equity - Warrants (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureStockholdersEquityWarrantsDetails</Role>
      <ShortName>Stockholders' Equity - Warrants (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>35</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R36.htm</HtmlFileName>
      <LongName>1140901 - Disclosure - Fair Value Measurements (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureFairValueMeasurementsDetails</Role>
      <ShortName>Fair Value Measurements (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.buzzfeed.com/role/DisclosureFairValueMeasurementsTables</ParentRole>
      <Position>36</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R37.htm</HtmlFileName>
      <LongName>1140902 - Disclosure - Fair Value Measurements - Change in the Fair Value of the Warrant Liabilities (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureFairValueMeasurementsChangeInFairValueOfWarrantLiabilitiesDetails</Role>
      <ShortName>Fair Value Measurements - Change in the Fair Value of the Warrant Liabilities (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>37</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R38.htm</HtmlFileName>
      <LongName>1140903 - Disclosure - Fair Value Measurements - Level 3 Fair Value Measurements Inputs (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureFairValueMeasurementsLevel3FairValueMeasurementsInputsDetails</Role>
      <ShortName>Fair Value Measurements - Level 3 Fair Value Measurements Inputs (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>38</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R39.htm</HtmlFileName>
      <LongName>1200100 - Statement - BALANCE SHEET</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/StatementBalanceSheet</Role>
      <ShortName>BALANCE SHEET</ShortName>
      <MenuCategory>Uncategorized</MenuCategory>
      <Position>39</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R40.htm</HtmlFileName>
      <LongName>1200105 - Statement - BALANCE SHEET (Parenthetical)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/StatementBalanceSheetParenthetical</Role>
      <ShortName>BALANCE SHEET (Parenthetical)</ShortName>
      <MenuCategory>Cover</MenuCategory>
      <Position>40</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R41.htm</HtmlFileName>
      <LongName>1200200 - Statement - STATEMENT OF OPERATIONS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/StatementStatementOfOperations</Role>
      <ShortName>STATEMENT OF OPERATIONS</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>41</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R42.htm</HtmlFileName>
      <LongName>1200205 - Statement - STATEMENT OF OPERATIONS (parenthetical)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/StatementStatementOfOperationsParenthetical</Role>
      <ShortName>STATEMENT OF OPERATIONS (parenthetical)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>42</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R43.htm</HtmlFileName>
      <LongName>1200300 - Statement - STATEMENT OF CHANGES IN STOCKHOLDER'S EQUITY</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/StatementStatementOfChangesInStockholderSEquity</Role>
      <ShortName>STATEMENT OF CHANGES IN STOCKHOLDER'S EQUITY</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>43</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R44.htm</HtmlFileName>
      <LongName>1200305 - Statement - STATEMENT OF CHANGES IN STOCKHOLDER'S EQUITY (Parenthetical)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/StatementStatementOfChangesInStockholderSEquityParenthetical</Role>
      <ShortName>STATEMENT OF CHANGES IN STOCKHOLDER'S EQUITY (Parenthetical)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>44</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R45.htm</HtmlFileName>
      <LongName>1200400 - Statement - STATEMENT OF CASH FLOWS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/StatementStatementOfCashFlows</Role>
      <ShortName>STATEMENT OF CASH FLOWS</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>45</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R46.htm</HtmlFileName>
      <LongName>1210101 - Disclosure - Description of Organization and Business Operations</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureDescriptionOfOrganizationAndBusinessOperationss</Role>
      <ShortName>Description of Organization and Business Operations</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>46</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R47.htm</HtmlFileName>
      <LongName>1210201 - Disclosure - Summary of Significant Accounting Policies</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureSummaryOfSignificantAccountingPolicies</Role>
      <ShortName>Summary of Significant Accounting Policies</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>47</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R48.htm</HtmlFileName>
      <LongName>1210301 - Disclosure - Initial Public Offering</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureInitialPublicOfferings</Role>
      <ShortName>Initial Public Offering</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>48</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R49.htm</HtmlFileName>
      <LongName>1210401 - Disclosure - Related Party Transactions</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureRelatedPartyTransactionss</Role>
      <ShortName>Related Party Transactions</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>49</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R50.htm</HtmlFileName>
      <LongName>1210501 - Disclosure - Commitments and Contingencies</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureCommitmentsAndContingencies</Role>
      <ShortName>Commitments and Contingencies</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>50</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R51.htm</HtmlFileName>
      <LongName>1210601 - Disclosure - Stockholders' Equity</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureStockholdersEquity</Role>
      <ShortName>Stockholders' Equity</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>51</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R52.htm</HtmlFileName>
      <LongName>1210701 - Disclosure - Subsequent Events</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureSubsequentEventss</Role>
      <ShortName>Subsequent Events</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>52</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R53.htm</HtmlFileName>
      <LongName>1220202 - Disclosure - Summary of Significant Accounting Policies (Policies)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureSummaryOfSignificantAccountingPoliciesPolicies</Role>
      <ShortName>Summary of Significant Accounting Policies (Policies)</ShortName>
      <MenuCategory>Policies</MenuCategory>
      <ParentRole>http://www.buzzfeed.com/role/DisclosureBasisOfPresentationAndSummaryOfSignificantAccountingPolicies</ParentRole>
      <Position>53</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R54.htm</HtmlFileName>
      <LongName>1240101 - Disclosure - Description of Organization and Business Operations (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureDescriptionOfOrganizationAndBusinessOperationsDetailss</Role>
      <ShortName>Description of Organization and Business Operations (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.buzzfeed.com/role/DisclosureDescriptionOfOrganizationAndBusinessOperations</ParentRole>
      <Position>54</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R55.htm</HtmlFileName>
      <LongName>1240201 - Disclosure - Summary of Significant Accounting Policies (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureSummaryOfSignificantAccountingPoliciesDetails</Role>
      <ShortName>Summary of Significant Accounting Policies (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.buzzfeed.com/role/DisclosureSummaryOfSignificantAccountingPoliciesPolicies</ParentRole>
      <Position>55</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R56.htm</HtmlFileName>
      <LongName>1240202 - Disclosure - Summary of Significant Accounting Policies - Reconciliation of Net Loss per Common Share (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureSummaryOfSignificantAccountingPoliciesReconciliationOfNetLossPerCommonShareDetails</Role>
      <ShortName>Summary of Significant Accounting Policies - Reconciliation of Net Loss per Common Share (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>56</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R57.htm</HtmlFileName>
      <LongName>1240301 - Disclosure - Initial Public Offering (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureInitialPublicOfferingDetailss</Role>
      <ShortName>Initial Public Offering (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.buzzfeed.com/role/DisclosureInitialPublicOffering</ParentRole>
      <Position>57</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R58.htm</HtmlFileName>
      <LongName>1240401 - Disclosure - Related Party Transactions - Founder Shares (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureRelatedPartyTransactionsFounderSharesDetailss</Role>
      <ShortName>Related Party Transactions - Founder Shares (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>58</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R59.htm</HtmlFileName>
      <LongName>1240402 - Disclosure - Related Party Transactions - Additional Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureRelatedPartyTransactionsAdditionalInformationDetailss</Role>
      <ShortName>Related Party Transactions - Additional Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>59</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R60.htm</HtmlFileName>
      <LongName>1240501 - Disclosure - Commitments and Contingencies (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureCommitmentsAndContingenciesDetails</Role>
      <ShortName>Commitments and Contingencies (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.buzzfeed.com/role/DisclosureCommitmentsAndContingencies</ParentRole>
      <Position>60</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R61.htm</HtmlFileName>
      <LongName>1240601 - Disclosure - Stockholders' Equity - Preferred Stock Shares (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureStockholdersEquityPreferredStockSharesDetails</Role>
      <ShortName>Stockholders' Equity - Preferred Stock Shares (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>61</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R62.htm</HtmlFileName>
      <LongName>1240602 - Disclosure - Stockholders' Equity - Common Stock Shares (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureStockholdersEquityCommonStockSharesDetails</Role>
      <ShortName>Stockholders' Equity - Common Stock Shares (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>62</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R63.htm</HtmlFileName>
      <LongName>1240603 - Disclosure - Stockholders' Equity - Warrants (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureStockholdersEquityWarrantsDetailss</Role>
      <ShortName>Stockholders' Equity - Warrants (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>63</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R64.htm</HtmlFileName>
      <LongName>2100100 - Statement - UNAUDITED CONDENSED CONSOLIDATED BALANCE SHEETS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/StatementUnauditedCondensedConsolidatedBalanceSheets</Role>
      <ShortName>UNAUDITED CONDENSED CONSOLIDATED BALANCE SHEETS</ShortName>
      <MenuCategory>Uncategorized</MenuCategory>
      <Position>64</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R65.htm</HtmlFileName>
      <LongName>2100105 - Statement - UNAUDITED CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/StatementUnauditedCondensedConsolidatedBalanceSheetsParenthetical</Role>
      <ShortName>UNAUDITED CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical)</ShortName>
      <MenuCategory>Cover</MenuCategory>
      <Position>65</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R66.htm</HtmlFileName>
      <LongName>2100200 - Statement - UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/StatementUnauditedCondensedConsolidatedStatementsOfOperationss</Role>
      <ShortName>UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>66</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R67.htm</HtmlFileName>
      <LongName>2100300 - Statement - UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/StatementUnauditedCondensedConsolidatedStatementsOfComprehensiveLoss</Role>
      <ShortName>UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>67</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R68.htm</HtmlFileName>
      <LongName>2100400 - Statement - UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDER'S DEFICIT</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/StatementUnauditedCondensedConsolidatedStatementsOfStockholderSDeficit</Role>
      <ShortName>UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDER'S DEFICIT</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>68</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R69.htm</HtmlFileName>
      <LongName>2100500 - Statement - UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/StatementUnauditedCondensedConsolidatedStatementsOfCashFlows</Role>
      <ShortName>UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>69</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R70.htm</HtmlFileName>
      <LongName>2110101 - Disclosure - Description of the Business</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureDescriptionOfBusiness</Role>
      <ShortName>Description of the Business</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>70</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R71.htm</HtmlFileName>
      <LongName>2110201 - Disclosure - Summary of Significant Accounting Policies</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureSummaryOfSignificantAccountingPoliciess</Role>
      <ShortName>Summary of Significant Accounting Policies</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>71</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R72.htm</HtmlFileName>
      <LongName>2110301 - Disclosure - Acquisition and Disposition</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureAcquisitionAndDisposition</Role>
      <ShortName>Acquisition and Disposition</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>72</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R73.htm</HtmlFileName>
      <LongName>2110401 - Disclosure - Revenue Recognition</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureRevenueRecognition</Role>
      <ShortName>Revenue Recognition</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>73</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R74.htm</HtmlFileName>
      <LongName>2110501 - Disclosure - Fair Value Measurements</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureFairValueMeasurementss</Role>
      <ShortName>Fair Value Measurements</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>74</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R75.htm</HtmlFileName>
      <LongName>2110601 - Disclosure - Property and Equipment, net</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosurePropertyAndEquipmentNet</Role>
      <ShortName>Property and Equipment, net</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>75</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R76.htm</HtmlFileName>
      <LongName>2110701 - Disclosure - Capitalized Software Costs, net</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureCapitalizedSoftwareCostsNet</Role>
      <ShortName>Capitalized Software Costs, net</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>76</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R77.htm</HtmlFileName>
      <LongName>2110801 - Disclosure - Goodwill and Intangible Assets, net</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureGoodwillAndIntangibleAssetsNet</Role>
      <ShortName>Goodwill and Intangible Assets, net</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>77</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R78.htm</HtmlFileName>
      <LongName>2110901 - Disclosure - Debt</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureDebt</Role>
      <ShortName>Debt</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>78</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R79.htm</HtmlFileName>
      <LongName>2111001 - Disclosure - Convertible Preferred Stock</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureConvertiblePreferredStock</Role>
      <ShortName>Convertible Preferred Stock</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>79</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R80.htm</HtmlFileName>
      <LongName>2111101 - Disclosure - Redeemable Noncontrolling Interest</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureRedeemableNoncontrollingInterest</Role>
      <ShortName>Redeemable Noncontrolling Interest</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>80</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R81.htm</HtmlFileName>
      <LongName>2111201 - Disclosure - Stockholders' Equity</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureStockholdersEquitys</Role>
      <ShortName>Stockholders' Equity</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>81</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R82.htm</HtmlFileName>
      <LongName>2111301 - Disclosure - Earnings (Loss) Per Share</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureEarningsLossPerShare</Role>
      <ShortName>Earnings (Loss) Per Share</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>82</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R83.htm</HtmlFileName>
      <LongName>2111401 - Disclosure - Income Taxes</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureIncomeTaxes</Role>
      <ShortName>Income Taxes</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>83</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R84.htm</HtmlFileName>
      <LongName>2111501 - Disclosure - Restructuring Costs</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureRestructuringCosts</Role>
      <ShortName>Restructuring Costs</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>84</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R85.htm</HtmlFileName>
      <LongName>2111601 - Disclosure - Commitments and Contingencies</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureCommitmentsAndContingenciess</Role>
      <ShortName>Commitments and Contingencies</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>85</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R86.htm</HtmlFileName>
      <LongName>2111701 - Disclosure - Cash and Cash Equivalents and Restricted Cash</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureCashAndCashEquivalentsAndRestrictedCash</Role>
      <ShortName>Cash and Cash Equivalents and Restricted Cash</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>86</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R87.htm</HtmlFileName>
      <LongName>2111801 - Disclosure - Related party Transactions</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureRelatedPartyTransactionsss</Role>
      <ShortName>Related party Transactions</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>87</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R88.htm</HtmlFileName>
      <LongName>2111901 - Disclosure - Subsequent Events</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureSubsequentEventsss</Role>
      <ShortName>Subsequent Events</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>88</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R89.htm</HtmlFileName>
      <LongName>2120202 - Disclosure - Summary of Significant Accounting Policies (Polices)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureSummaryOfSignificantAccountingPoliciesPolices</Role>
      <ShortName>Summary of Significant Accounting Policies (Polices)</ShortName>
      <MenuCategory>Policies</MenuCategory>
      <ParentRole>http://www.buzzfeed.com/role/DisclosureBasisOfPresentationAndSummaryOfSignificantAccountingPolicies</ParentRole>
      <Position>89</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R90.htm</HtmlFileName>
      <LongName>2130303 - Disclosure - Acquisition and Disposition (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureAcquisitionAndDispositionTables</Role>
      <ShortName>Acquisition and Disposition (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.buzzfeed.com/role/DisclosureAcquisitionAndDisposition</ParentRole>
      <Position>90</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R91.htm</HtmlFileName>
      <LongName>2130403 - Disclosure - Revenue Recognition (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureRevenueRecognitionTables</Role>
      <ShortName>Revenue Recognition (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.buzzfeed.com/role/DisclosureRevenueRecognition</ParentRole>
      <Position>91</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R92.htm</HtmlFileName>
      <LongName>2130503 - Disclosure - Fair Value Measurements (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureFairValueMeasurementsTabless</Role>
      <ShortName>Fair Value Measurements (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.buzzfeed.com/role/DisclosureFairValueMeasurements</ParentRole>
      <Position>92</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R93.htm</HtmlFileName>
      <LongName>2130603 - Disclosure - Property and Equipment, net (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosurePropertyAndEquipmentNetTables</Role>
      <ShortName>Property and Equipment, net (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.buzzfeed.com/role/DisclosurePropertyAndEquipmentNet</ParentRole>
      <Position>93</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R94.htm</HtmlFileName>
      <LongName>2130703 - Disclosure - Capitalized Software Costs, net (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureCapitalizedSoftwareCostsNetTables</Role>
      <ShortName>Capitalized Software Costs, net (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.buzzfeed.com/role/DisclosureCapitalizedSoftwareCostsNet</ParentRole>
      <Position>94</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R95.htm</HtmlFileName>
      <LongName>2130803 - Disclosure - Goodwill and Intangible Assets, net (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureGoodwillAndIntangibleAssetsNetTables</Role>
      <ShortName>Goodwill and Intangible Assets, net (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.buzzfeed.com/role/DisclosureGoodwillAndIntangibleAssetsNet</ParentRole>
      <Position>95</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R96.htm</HtmlFileName>
      <LongName>2131003 - Disclosure - Convertible Preferred Stock (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureConvertiblePreferredStockTables</Role>
      <ShortName>Convertible Preferred Stock (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.buzzfeed.com/role/DisclosureConvertiblePreferredStock</ParentRole>
      <Position>96</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R97.htm</HtmlFileName>
      <LongName>2131103 - Disclosure - Redeemable Noncontrolling Interest (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureRedeemableNoncontrollingInterestTables</Role>
      <ShortName>Redeemable Noncontrolling Interest (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.buzzfeed.com/role/DisclosureRedeemableNoncontrollingInterest</ParentRole>
      <Position>97</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R98.htm</HtmlFileName>
      <LongName>2131203 - Disclosure - Stockholders' Equity (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureStockholdersEquityTables</Role>
      <ShortName>Stockholders' Equity (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.buzzfeed.com/role/DisclosureStockholdersEquityDeficit</ParentRole>
      <Position>98</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R99.htm</HtmlFileName>
      <LongName>2131303 - Disclosure - Earnings (Loss) Per Share (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureEarningsLossPerShareTables</Role>
      <ShortName>Earnings (Loss) Per Share (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.buzzfeed.com/role/DisclosureEarningsLossPerShare</ParentRole>
      <Position>99</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R100.htm</HtmlFileName>
      <LongName>2131403 - Disclosure - Income Taxes (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureIncomeTaxesTables</Role>
      <ShortName>Income Taxes (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.buzzfeed.com/role/DisclosureIncomeTaxes</ParentRole>
      <Position>100</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R101.htm</HtmlFileName>
      <LongName>2131703 - Disclosure - Cash and Cash Equivalents and Restricted Cash (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureCashAndCashEquivalentsAndRestrictedCashTables</Role>
      <ShortName>Cash and Cash Equivalents and Restricted Cash (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.buzzfeed.com/role/DisclosureCashAndCashEquivalentsAndRestrictedCash</ParentRole>
      <Position>101</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R102.htm</HtmlFileName>
      <LongName>2140101 - Disclosure - Description of the Business (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureDescriptionOfBusinessDetails</Role>
      <ShortName>Description of the Business (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.buzzfeed.com/role/DisclosureDescriptionOfBusiness</ParentRole>
      <Position>102</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R103.htm</HtmlFileName>
      <LongName>2140301 - Disclosure - Acquisition and Disposition - Fair Value Of Consideration (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureAcquisitionAndDispositionFairValueOfConsiderationDetails</Role>
      <ShortName>Acquisition and Disposition - Fair Value Of Consideration (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>103</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R104.htm</HtmlFileName>
      <LongName>2140302 - Disclosure - Acquisition and Disposition - Fair Value Of Identifiable Assets Acquired And Liabilities (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureAcquisitionAndDispositionFairValueOfIdentifiableAssetsAcquiredAndLiabilitiesDetails</Role>
      <ShortName>Acquisition and Disposition - Fair Value Of Identifiable Assets Acquired And Liabilities (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>104</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R105.htm</HtmlFileName>
      <LongName>2140303 - Disclosure - Acquisition and Disposition - Additional information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureAcquisitionAndDispositionAdditionalInformationDetails</Role>
      <ShortName>Acquisition and Disposition - Additional information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>105</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R106.htm</HtmlFileName>
      <LongName>2140401 - Disclosure - Revenue Recognition - Disaggregated Revenue (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureRevenueRecognitionDisaggregatedRevenueDetails</Role>
      <ShortName>Revenue Recognition - Disaggregated Revenue (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>106</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R107.htm</HtmlFileName>
      <LongName>2140402 - Disclosure - Revenue Recognition (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureRevenueRecognitionDetails</Role>
      <ShortName>Revenue Recognition (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.buzzfeed.com/role/DisclosureRevenueRecognitionTables</ParentRole>
      <Position>107</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R108.htm</HtmlFileName>
      <LongName>2140501 - Disclosure - Fair Value Measurements - Money Market Funds (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureFairValueMeasurementsMoneyMarketFundsDetails</Role>
      <ShortName>Fair Value Measurements - Money Market Funds (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>108</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R109.htm</HtmlFileName>
      <LongName>2140601 - Disclosure - Property and Equipment, net (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosurePropertyAndEquipmentNetDetails</Role>
      <ShortName>Property and Equipment, net (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.buzzfeed.com/role/DisclosurePropertyAndEquipmentNetTables</ParentRole>
      <Position>109</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R110.htm</HtmlFileName>
      <LongName>2140701 - Disclosure - Capitalized Software Costs, net (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureCapitalizedSoftwareCostsNetDetails</Role>
      <ShortName>Capitalized Software Costs, net (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.buzzfeed.com/role/DisclosureCapitalizedSoftwareCostsNetTables</ParentRole>
      <Position>110</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R111.htm</HtmlFileName>
      <LongName>2140801 - Disclosure - Goodwill and Intangible Assets, net - Goodwill Activities (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureGoodwillAndIntangibleAssetsNetGoodwillActivitiesDetails</Role>
      <ShortName>Goodwill and Intangible Assets, net - Goodwill Activities (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>111</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R112.htm</HtmlFileName>
      <LongName>2140802 - Disclosure - Goodwill and Intangible Assets, net - Intangible Assets and weighted average remaining useful lives (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureGoodwillAndIntangibleAssetsNetIntangibleAssetsAndWeightedAverageRemainingUsefulLivesDetails</Role>
      <ShortName>Goodwill and Intangible Assets, net - Intangible Assets and weighted average remaining useful lives (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>112</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R113.htm</HtmlFileName>
      <LongName>2140803 - Disclosure - Goodwill and Intangible Assets, net - Estimated Future Amortization (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureGoodwillAndIntangibleAssetsNetEstimatedFutureAmortizationDetails</Role>
      <ShortName>Goodwill and Intangible Assets, net - Estimated Future Amortization (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>113</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R114.htm</HtmlFileName>
      <LongName>2140804 - Disclosure - Goodwill and Intangible Assets, net (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureGoodwillAndIntangibleAssetsNetDetails</Role>
      <ShortName>Goodwill and Intangible Assets, net (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.buzzfeed.com/role/DisclosureGoodwillAndIntangibleAssetsNetTables</ParentRole>
      <Position>114</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R115.htm</HtmlFileName>
      <LongName>2140901 - Disclosure - Debt (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureDebtDetails</Role>
      <ShortName>Debt (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.buzzfeed.com/role/DisclosureDebt</ParentRole>
      <Position>115</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R116.htm</HtmlFileName>
      <LongName>2141001 - Disclosure - Convertible Preferred Stock (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureConvertiblePreferredStockDetails</Role>
      <ShortName>Convertible Preferred Stock (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.buzzfeed.com/role/DisclosureConvertiblePreferredStockTables</ParentRole>
      <Position>116</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R117.htm</HtmlFileName>
      <LongName>2141101 - Disclosure - Redeemable Noncontrolling Interest (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureRedeemableNoncontrollingInterestDetails</Role>
      <ShortName>Redeemable Noncontrolling Interest (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.buzzfeed.com/role/DisclosureRedeemableNoncontrollingInterestTables</ParentRole>
      <Position>117</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R118.htm</HtmlFileName>
      <LongName>2141201 - Disclosure - Stockholders' Equity - Summary of the share activity under the 2015 Plan (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureStockholdersEquitySummaryOfShareActivityUnder2015PlanDetails</Role>
      <ShortName>Stockholders' Equity - Summary of the share activity under the 2015 Plan (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>118</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R119.htm</HtmlFileName>
      <LongName>2141202 - Disclosure - Stockholders' Equity - Summary of the restricted stock unit activity (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureStockholdersEquitySummaryOfRestrictedStockUnitActivityDetails</Role>
      <ShortName>Stockholders' Equity - Summary of the restricted stock unit activity (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>119</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R120.htm</HtmlFileName>
      <LongName>2141203 - Disclosure - Stockholders' Equity - Stock-Based Compensation Expense (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureStockholdersEquityStockBasedCompensationExpenseDetails</Role>
      <ShortName>Stockholders' Equity - Stock-Based Compensation Expense (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>120</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R121.htm</HtmlFileName>
      <LongName>2141204 - Disclosure - Stockholders' Equity - (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureStockholdersEquityDetails</Role>
      <ShortName>Stockholders' Equity - (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.buzzfeed.com/role/DisclosureStockholdersEquityTables</ParentRole>
      <Position>121</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R122.htm</HtmlFileName>
      <LongName>2141301 - Disclosure - Earnings (Loss) Per Share - Computation of basic and diluted loss per share (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureEarningsLossPerShareComputationOfBasicAndDilutedLossPerShareDetails</Role>
      <ShortName>Earnings (Loss) Per Share - Computation of basic and diluted loss per share (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.buzzfeed.com/role/DisclosureEarningsLossPerShareTables</ParentRole>
      <Position>122</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R123.htm</HtmlFileName>
      <LongName>2141302 - Disclosure - Earnings (Loss) Per Share - Calculation of diluted loss per share (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureEarningsLossPerShareCalculationOfDilutedLossPerShareDetails</Role>
      <ShortName>Earnings (Loss) Per Share - Calculation of diluted loss per share (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.buzzfeed.com/role/DisclosureEarningsLossPerShareTables</ParentRole>
      <Position>123</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R124.htm</HtmlFileName>
      <LongName>2141303 - Disclosure - Earnings (Loss) Per Share - Additional information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureEarningsLossPerShareAdditionalInformationDetails</Role>
      <ShortName>Earnings (Loss) Per Share - Additional information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.buzzfeed.com/role/DisclosureEarningsLossPerShareTables</ParentRole>
      <Position>124</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R125.htm</HtmlFileName>
      <LongName>2141401 - Disclosure - Income Taxes (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureIncomeTaxesDetails</Role>
      <ShortName>Income Taxes (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.buzzfeed.com/role/DisclosureIncomeTaxesTables</ParentRole>
      <Position>125</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R126.htm</HtmlFileName>
      <LongName>2141402 - Disclosure - Income Taxes - Additional Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureIncomeTaxesAdditionalInformationDetails</Role>
      <ShortName>Income Taxes - Additional Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>126</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R127.htm</HtmlFileName>
      <LongName>2141403 - Disclosure - Income Taxes - Reconciliation of the U.S. federal statutory income tax (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureIncomeTaxesReconciliationOfUsFederalStatutoryIncomeTaxDetails</Role>
      <ShortName>Income Taxes - Reconciliation of the U.S. federal statutory income tax (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>127</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R128.htm</HtmlFileName>
      <LongName>2141404 - Disclosure - Income Taxes - Deferred tax assets and liabilities (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureIncomeTaxesDeferredTaxAssetsAndLiabilitiesDetails</Role>
      <ShortName>Income Taxes - Deferred tax assets and liabilities (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>128</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R129.htm</HtmlFileName>
      <LongName>2141501 - Disclosure - Restructuring Costs (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureRestructuringCostsDetails</Role>
      <ShortName>Restructuring Costs (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.buzzfeed.com/role/DisclosureRestructuringCosts</ParentRole>
      <Position>129</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R130.htm</HtmlFileName>
      <LongName>2141601 - Disclosure - Commitments and Contingencies - (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureCommitmentsAndContingenciesDetailss</Role>
      <ShortName>Commitments and Contingencies - (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.buzzfeed.com/role/DisclosureCommitmentsAndContingencies</ParentRole>
      <Position>130</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R131.htm</HtmlFileName>
      <LongName>2141701 - Disclosure - Cash and Cash Equivalents and Restricted Cash (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureCashAndCashEquivalentsAndRestrictedCashDetails</Role>
      <ShortName>Cash and Cash Equivalents and Restricted Cash (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.buzzfeed.com/role/DisclosureCashAndCashEquivalentsAndRestrictedCashTables</ParentRole>
      <Position>131</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R132.htm</HtmlFileName>
      <LongName>2141801 - Disclosure - Related party Transactions (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureRelatedPartyTransactionsDetails</Role>
      <ShortName>Related party Transactions (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.buzzfeed.com/role/DisclosureRelatedPartyTransactionsss</ParentRole>
      <Position>132</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R133.htm</HtmlFileName>
      <LongName>2141901 - Disclosure - Subsequent Events (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureSubsequentEventsDetails</Role>
      <ShortName>Subsequent Events (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.buzzfeed.com/role/DisclosureSubsequentEvents</ParentRole>
      <Position>133</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R134.htm</HtmlFileName>
      <LongName>2200100 - Statement - CONSOLIDATED BALANCE SHEETS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/StatementConsolidatedBalanceSheets</Role>
      <ShortName>CONSOLIDATED BALANCE SHEETS</ShortName>
      <MenuCategory>Uncategorized</MenuCategory>
      <Position>134</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R135.htm</HtmlFileName>
      <LongName>2200105 - Statement - CONSOLIDATED BALANCE SHEETS (Parenthetical)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/StatementConsolidatedBalanceSheetsParenthetical</Role>
      <ShortName>CONSOLIDATED BALANCE SHEETS (Parenthetical)</ShortName>
      <MenuCategory>Cover</MenuCategory>
      <Position>135</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R136.htm</HtmlFileName>
      <LongName>2200200 - Statement - CONSOLIDATED STATEMENTS OF OPERATIONS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/StatementConsolidatedStatementsOfOperations</Role>
      <ShortName>CONSOLIDATED STATEMENTS OF OPERATIONS</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>136</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R137.htm</HtmlFileName>
      <LongName>2200300 - Statement - CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/StatementConsolidatedStatementsOfComprehensiveIncomeLoss</Role>
      <ShortName>CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>137</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R138.htm</HtmlFileName>
      <LongName>2200400 - Statement - CONSOLIDATED STATEMENTS OF STOCKHOLDER'S DEFICIT</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/StatementConsolidatedStatementsOfStockholderSDeficit</Role>
      <ShortName>CONSOLIDATED STATEMENTS OF STOCKHOLDER'S DEFICIT</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>138</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R139.htm</HtmlFileName>
      <LongName>2200500 - Statement - CONSOLIDATED STATEMENTS OF CASH FLOWS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/StatementConsolidatedStatementsOfCashFlows</Role>
      <ShortName>CONSOLIDATED STATEMENTS OF CASH FLOWS</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>139</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R140.htm</HtmlFileName>
      <LongName>2210101 - Disclosure - Description of the Business</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureDescriptionOfBusinesss</Role>
      <ShortName>Description of the Business</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>140</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R141.htm</HtmlFileName>
      <LongName>2210201 - Disclosure - Summary of Significant Accounting Policies</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureSummaryOfSignificantAccountingPoliciesss</Role>
      <ShortName>Summary of Significant Accounting Policies</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>141</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R142.htm</HtmlFileName>
      <LongName>2210301 - Disclosure - Revenue Recognition</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureRevenueRecognitions</Role>
      <ShortName>Revenue Recognition</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>142</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R143.htm</HtmlFileName>
      <LongName>2210401 - Disclosure - Fair Value Measurements</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureFairValueMeasurementsss</Role>
      <ShortName>Fair Value Measurements</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>143</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R144.htm</HtmlFileName>
      <LongName>2210501 - Disclosure - Property and Equipment, net</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosurePropertyAndEquipmentNets</Role>
      <ShortName>Property and Equipment, net</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>144</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R145.htm</HtmlFileName>
      <LongName>2210601 - Disclosure - Capitalized Software Costs, net</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureCapitalizedSoftwareCostsNets</Role>
      <ShortName>Capitalized Software Costs, net</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>145</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R146.htm</HtmlFileName>
      <LongName>2210701 - Disclosure - Debt</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureDebts</Role>
      <ShortName>Debt</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>146</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R147.htm</HtmlFileName>
      <LongName>2210801 - Disclosure - Convertible Preferred Stock</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureConvertiblePreferredStocks</Role>
      <ShortName>Convertible Preferred Stock</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>147</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R148.htm</HtmlFileName>
      <LongName>2210901 - Disclosure - Redeemable Noncontrolling Interest</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureRedeemableNoncontrollingInterests</Role>
      <ShortName>Redeemable Noncontrolling Interest</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>148</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R149.htm</HtmlFileName>
      <LongName>2211001 - Disclosure - Stockholders' Equity</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureStockholdersEquityss</Role>
      <ShortName>Stockholders' Equity</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>149</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R150.htm</HtmlFileName>
      <LongName>2211101 - Disclosure - Earnings (Loss) Per Share</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureEarningsLossPerShares</Role>
      <ShortName>Earnings (Loss) Per Share</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>150</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R151.htm</HtmlFileName>
      <LongName>2211201 - Disclosure - Income Taxes</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureIncomeTaxess</Role>
      <ShortName>Income Taxes</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>151</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R152.htm</HtmlFileName>
      <LongName>2211301 - Disclosure - Restructuring Costs</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureRestructuringCostss</Role>
      <ShortName>Restructuring Costs</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>152</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R153.htm</HtmlFileName>
      <LongName>2211401 - Disclosure - Commitments and Contingencies</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureCommitmentsAndContingenciesss</Role>
      <ShortName>Commitments and Contingencies</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>153</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R154.htm</HtmlFileName>
      <LongName>2211501 - Disclosure - Disposition</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureDisposition</Role>
      <ShortName>Disposition</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>154</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R155.htm</HtmlFileName>
      <LongName>2211601 - Disclosure - Segment Information</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureSegmentInformation</Role>
      <ShortName>Segment Information</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>155</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R156.htm</HtmlFileName>
      <LongName>2211701 - Disclosure - Related party Transactions</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureRelatedPartyTransactionssss</Role>
      <ShortName>Related party Transactions</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>156</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R157.htm</HtmlFileName>
      <LongName>2211801 - Disclosure - Subsequent Events</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureSubsequentEventssss</Role>
      <ShortName>Subsequent Events</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>157</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R158.htm</HtmlFileName>
      <LongName>2220202 - Disclosure - Summary of Significant Accounting Policies (Polices)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureSummaryOfSignificantAccountingPoliciesPolicess</Role>
      <ShortName>Summary of Significant Accounting Policies (Polices)</ShortName>
      <MenuCategory>Policies</MenuCategory>
      <ParentRole>http://www.buzzfeed.com/role/DisclosureBasisOfPresentationAndSummaryOfSignificantAccountingPolicies</ParentRole>
      <Position>158</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R159.htm</HtmlFileName>
      <LongName>2230203 - Disclosure - Summary of Significant Accounting Policies (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureSummaryOfSignificantAccountingPoliciesTables</Role>
      <ShortName>Summary of Significant Accounting Policies (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.buzzfeed.com/role/DisclosureSummaryOfSignificantAccountingPolicies</ParentRole>
      <Position>159</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R160.htm</HtmlFileName>
      <LongName>2230303 - Disclosure - Revenue Recognition (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureRevenueRecognitionTabless</Role>
      <ShortName>Revenue Recognition (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.buzzfeed.com/role/DisclosureRevenueRecognition</ParentRole>
      <Position>160</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R161.htm</HtmlFileName>
      <LongName>2230403 - Disclosure - Fair Value Measurements (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureFairValueMeasurementsTablesss</Role>
      <ShortName>Fair Value Measurements (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.buzzfeed.com/role/DisclosureFairValueMeasurements</ParentRole>
      <Position>161</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R162.htm</HtmlFileName>
      <LongName>2230503 - Disclosure - Property and Equipment, net (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosurePropertyAndEquipmentNetTabless</Role>
      <ShortName>Property and Equipment, net (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.buzzfeed.com/role/DisclosurePropertyAndEquipmentNet</ParentRole>
      <Position>162</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R163.htm</HtmlFileName>
      <LongName>2230603 - Disclosure - Capitalized Software Costs, net (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureCapitalizedSoftwareCostsNetTabless</Role>
      <ShortName>Capitalized Software Costs, net (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.buzzfeed.com/role/DisclosureCapitalizedSoftwareCostsNet</ParentRole>
      <Position>163</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R164.htm</HtmlFileName>
      <LongName>2230803 - Disclosure - Convertible Preferred Stock (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureConvertiblePreferredStockTabless</Role>
      <ShortName>Convertible Preferred Stock (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.buzzfeed.com/role/DisclosureConvertiblePreferredStock</ParentRole>
      <Position>164</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R165.htm</HtmlFileName>
      <LongName>2230903 - Disclosure - Redeemable Noncontrolling Interest (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureRedeemableNoncontrollingInterestTabless</Role>
      <ShortName>Redeemable Noncontrolling Interest (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.buzzfeed.com/role/DisclosureRedeemableNoncontrollingInterest</ParentRole>
      <Position>165</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R166.htm</HtmlFileName>
      <LongName>2231003 - Disclosure - Stockholders' Equity (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureStockholdersEquityTabless</Role>
      <ShortName>Stockholders' Equity (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.buzzfeed.com/role/DisclosureStockholdersEquityDeficit</ParentRole>
      <Position>166</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R167.htm</HtmlFileName>
      <LongName>2231103 - Disclosure - Earnings (Loss) Per Share (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureEarningsLossPerShareTabless</Role>
      <ShortName>Earnings (Loss) Per Share (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.buzzfeed.com/role/DisclosureEarningsLossPerShare</ParentRole>
      <Position>167</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R168.htm</HtmlFileName>
      <LongName>2231203 - Disclosure - Income Taxes (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureIncomeTaxesTabless</Role>
      <ShortName>Income Taxes (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.buzzfeed.com/role/DisclosureIncomeTaxes</ParentRole>
      <Position>168</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R169.htm</HtmlFileName>
      <LongName>2231403 - Disclosure - Commitments and Contingencies (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureCommitmentsAndContingenciesTables</Role>
      <ShortName>Commitments and Contingencies (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.buzzfeed.com/role/DisclosureCommitmentsAndContingencies</ParentRole>
      <Position>169</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R170.htm</HtmlFileName>
      <LongName>2231603 - Disclosure - Segment Information (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureSegmentInformationTables</Role>
      <ShortName>Segment Information (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.buzzfeed.com/role/DisclosureSegmentInformation</ParentRole>
      <Position>170</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R171.htm</HtmlFileName>
      <LongName>2240101 - Disclosure - Description of the Business (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureDescriptionOfBusinessDetailss</Role>
      <ShortName>Description of the Business (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.buzzfeed.com/role/DisclosureDescriptionOfBusiness</ParentRole>
      <Position>171</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R172.htm</HtmlFileName>
      <LongName>2240201 - Disclosure - Summary of Significant Accounting Policies - Cash and Cash Equivalents and Restricted Cash (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureSummaryOfSignificantAccountingPoliciesCashAndCashEquivalentsAndRestrictedCashDetails</Role>
      <ShortName>Summary of Significant Accounting Policies - Cash and Cash Equivalents and Restricted Cash (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>172</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R173.htm</HtmlFileName>
      <LongName>2240202 - Disclosure - Summary of Significant Accounting Policies -Allowance for doubtful accounts (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureSummaryOfSignificantAccountingPoliciesAllowanceForDoubtfulAccountsDetails</Role>
      <ShortName>Summary of Significant Accounting Policies -Allowance for doubtful accounts (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>173</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R174.htm</HtmlFileName>
      <LongName>2240203 - Disclosure - Summary of Significant Accounting Policies - Stock-based compensation cost (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureSummaryOfSignificantAccountingPoliciesStockBasedCompensationCostDetails</Role>
      <ShortName>Summary of Significant Accounting Policies - Stock-based compensation cost (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>174</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R175.htm</HtmlFileName>
      <LongName>2240204 - Disclosure - Summary of Significant Accounting Policies (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureSummaryOfSignificantAccountingPoliciesDetailss</Role>
      <ShortName>Summary of Significant Accounting Policies (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.buzzfeed.com/role/DisclosureSummaryOfSignificantAccountingPoliciesTables</ParentRole>
      <Position>175</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R176.htm</HtmlFileName>
      <LongName>2240301 - Disclosure - Revenue Recognition - Disaggregated Revenue (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureRevenueRecognitionDisaggregatedRevenueDetailss</Role>
      <ShortName>Revenue Recognition - Disaggregated Revenue (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>176</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R177.htm</HtmlFileName>
      <LongName>2240302 - Disclosure - Revenue Recognition (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureRevenueRecognitionDetailss</Role>
      <ShortName>Revenue Recognition (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.buzzfeed.com/role/DisclosureRevenueRecognitionTables</ParentRole>
      <Position>177</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R178.htm</HtmlFileName>
      <LongName>2240401 - Disclosure - Fair Value Measurements - Money Market Funds (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureFairValueMeasurementsMoneyMarketFundsDetailss</Role>
      <ShortName>Fair Value Measurements - Money Market Funds (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>178</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R179.htm</HtmlFileName>
      <LongName>2240501 - Disclosure - Property and Equipment, net (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosurePropertyAndEquipmentNetDetailss</Role>
      <ShortName>Property and Equipment, net (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.buzzfeed.com/role/DisclosurePropertyAndEquipmentNetTables</ParentRole>
      <Position>179</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R180.htm</HtmlFileName>
      <LongName>2240601 - Disclosure - Capitalized Software Costs, net (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureCapitalizedSoftwareCostsNetDetailss</Role>
      <ShortName>Capitalized Software Costs, net (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.buzzfeed.com/role/DisclosureCapitalizedSoftwareCostsNetTables</ParentRole>
      <Position>180</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R181.htm</HtmlFileName>
      <LongName>2240701 - Disclosure - Debt (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureDebtDetailss</Role>
      <ShortName>Debt (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.buzzfeed.com/role/DisclosureDebt</ParentRole>
      <Position>181</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R182.htm</HtmlFileName>
      <LongName>2240801 - Disclosure - Convertible Preferred Stock (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureConvertiblePreferredStockDetailss</Role>
      <ShortName>Convertible Preferred Stock (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.buzzfeed.com/role/DisclosureConvertiblePreferredStockTables</ParentRole>
      <Position>182</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R183.htm</HtmlFileName>
      <LongName>2240901 - Disclosure - Redeemable Noncontrolling Interest (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureRedeemableNoncontrollingInterestDetailss</Role>
      <ShortName>Redeemable Noncontrolling Interest (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.buzzfeed.com/role/DisclosureRedeemableNoncontrollingInterestTables</ParentRole>
      <Position>183</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R184.htm</HtmlFileName>
      <LongName>2241001 - Disclosure - Stockholders' Equity - Option pricing model (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureStockholdersEquityOptionPricingModelDetails</Role>
      <ShortName>Stockholders' Equity - Option pricing model (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>184</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R185.htm</HtmlFileName>
      <LongName>2241002 - Disclosure - Stockholders' Equity - Summary of the share activity under the 2015 Plan (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureStockholdersEquitySummaryOfShareActivityUnder2015PlanDetailss</Role>
      <ShortName>Stockholders' Equity - Summary of the share activity under the 2015 Plan (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>185</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R186.htm</HtmlFileName>
      <LongName>2241003 - Disclosure - Stockholders' Equity - Summary of the restricted stock unit activity (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureStockholdersEquitySummaryOfRestrictedStockUnitActivityDetailss</Role>
      <ShortName>Stockholders' Equity - Summary of the restricted stock unit activity (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>186</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R187.htm</HtmlFileName>
      <LongName>2241004 - Disclosure - Stockholders' Equity - (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureStockholdersEquityDetailss</Role>
      <ShortName>Stockholders' Equity - (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.buzzfeed.com/role/DisclosureStockholdersEquityTables</ParentRole>
      <Position>187</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R188.htm</HtmlFileName>
      <LongName>2241101 - Disclosure - Earnings (Loss) Per Share - Computation of basic and diluted loss per share (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureEarningsLossPerShareComputationOfBasicAndDilutedLossPerShareDetailss</Role>
      <ShortName>Earnings (Loss) Per Share - Computation of basic and diluted loss per share (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.buzzfeed.com/role/DisclosureEarningsLossPerShareTables</ParentRole>
      <Position>188</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R189.htm</HtmlFileName>
      <LongName>2241102 - Disclosure - Earnings (Loss) Per Share - Calculation of diluted loss per share (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureEarningsLossPerShareCalculationOfDilutedLossPerShareDetailss</Role>
      <ShortName>Earnings (Loss) Per Share - Calculation of diluted loss per share (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.buzzfeed.com/role/DisclosureEarningsLossPerShareTables</ParentRole>
      <Position>189</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R190.htm</HtmlFileName>
      <LongName>2241103 - Disclosure - Earnings (Loss) Per Share - Additional information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureEarningsLossPerShareAdditionalInformationDetailss</Role>
      <ShortName>Earnings (Loss) Per Share - Additional information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.buzzfeed.com/role/DisclosureEarningsLossPerShareTables</ParentRole>
      <Position>190</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R191.htm</HtmlFileName>
      <LongName>2241201 - Disclosure - Income Taxes - Domestic and foreign components of income (loss) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureIncomeTaxesDomesticAndForeignComponentsOfIncomeLossDetails</Role>
      <ShortName>Income Taxes - Domestic and foreign components of income (loss) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>191</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R192.htm</HtmlFileName>
      <LongName>2241202 - Disclosure - Income Taxes - Provision (benefit) for income taxes (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureIncomeTaxesProvisionBenefitForIncomeTaxesDetails</Role>
      <ShortName>Income Taxes - Provision (benefit) for income taxes (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>192</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R193.htm</HtmlFileName>
      <LongName>2241203 - Disclosure - Income Taxes - Reconciliation of the U.S. federal statutory income tax (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureIncomeTaxesReconciliationOfUsFederalStatutoryIncomeTaxDetailss</Role>
      <ShortName>Income Taxes - Reconciliation of the U.S. federal statutory income tax (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>193</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R194.htm</HtmlFileName>
      <LongName>2241204 - Disclosure - Income Taxes - Deferred tax assets and liabilities (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureIncomeTaxesDeferredTaxAssetsAndLiabilitiesDetailss</Role>
      <ShortName>Income Taxes - Deferred tax assets and liabilities (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>194</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R195.htm</HtmlFileName>
      <LongName>2241205 - Disclosure - Income Taxes - Additional information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureIncomeTaxesAdditionalInformationDetailss</Role>
      <ShortName>Income Taxes - Additional information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>195</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R196.htm</HtmlFileName>
      <LongName>2241301 - Disclosure - Restructuring Costs (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureRestructuringCostsDetailss</Role>
      <ShortName>Restructuring Costs (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.buzzfeed.com/role/DisclosureRestructuringCosts</ParentRole>
      <Position>196</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R197.htm</HtmlFileName>
      <LongName>2241401 - Disclosure - Commitments and Contingencies - Future minimum lease payments (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureCommitmentsAndContingenciesFutureMinimumLeasePaymentsDetails</Role>
      <ShortName>Commitments and Contingencies - Future minimum lease payments (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>197</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R198.htm</HtmlFileName>
      <LongName>2241402 - Disclosure - Commitments and Contingencies - Future under noncancelable sublease (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureCommitmentsAndContingenciesFutureUnderNoncancelableSubleaseDetails</Role>
      <ShortName>Commitments and Contingencies - Future under noncancelable sublease (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>198</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R199.htm</HtmlFileName>
      <LongName>2241403 - Disclosure - Commitments and Contingencies - Additional information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureCommitmentsAndContingenciesAdditionalInformationDetails</Role>
      <ShortName>Commitments and Contingencies - Additional information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>199</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R200.htm</HtmlFileName>
      <LongName>2241501 - Disclosure - Disposition (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureDispositionDetails</Role>
      <ShortName>Disposition (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.buzzfeed.com/role/DisclosureDisposition</ParentRole>
      <Position>200</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R201.htm</HtmlFileName>
      <LongName>2241601 - Disclosure - Segment Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureSegmentInformationDetails</Role>
      <ShortName>Segment Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.buzzfeed.com/role/DisclosureSegmentInformationTables</ParentRole>
      <Position>201</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R202.htm</HtmlFileName>
      <LongName>2241701 - Disclosure - Related party Transactions (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureRelatedPartyTransactionsDetailss</Role>
      <ShortName>Related party Transactions (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.buzzfeed.com/role/DisclosureRelatedPartyTransactionsss</ParentRole>
      <Position>202</Position>
    </Report>
    <Report instance="bzfd-20220111xs1.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R203.htm</HtmlFileName>
      <LongName>2241801 - Disclosure - Subsequent Events (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.buzzfeed.com/role/DisclosureSubsequentEventsDetailss</Role>
      <ShortName>Subsequent Events (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.buzzfeed.com/role/DisclosureSubsequentEvents</ParentRole>
      <Position>203</Position>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <LongName>All Reports</LongName>
      <ReportType>Book</ReportType>
      <ShortName>All Reports</ShortName>
    </Report>
  </MyReports>
  <InputFiles>
    <File doctype="S-1" original="bzfd-20220111xs1.htm">bzfd-20220111xs1.htm</File>
    <File>bzfd-20220111.xsd</File>
    <File>bzfd-20220111_cal.xml</File>
    <File>bzfd-20220111_def.xml</File>
    <File>bzfd-20220111_lab.xml</File>
    <File>bzfd-20220111_pre.xml</File>
    <File>bzfd-20220111xex10d18.htm</File>
    <File>bzfd-20220111xex23d1.htm</File>
    <File>bzfd-20220111xex23d2.htm</File>
    <File>bzfd-20220111xex23d3.htm</File>
    <File>bzfd-20220111xex5d1.htm</File>
  </InputFiles>
  <SupplementalFiles>
    <File>bzfd-20220111xs1009.jpg</File>
    <File>bzfd-20220111xs1012.jpg</File>
    <File>bzfd-20220111xs1013.jpg</File>
  </SupplementalFiles>
  <BaseTaxonomies>
    <BaseTaxonomy>http://fasb.org/srt/2021-01-31</BaseTaxonomy>
    <BaseTaxonomy>http://fasb.org/us-gaap/2021-01-31</BaseTaxonomy>
    <BaseTaxonomy>http://xbrl.sec.gov/dei/2021</BaseTaxonomy>
    <BaseTaxonomy>http://xbrl.sec.gov/country/2021</BaseTaxonomy>
  </BaseTaxonomies>
  <HasPresentationLinkbase>true</HasPresentationLinkbase>
  <HasCalculationLinkbase>true</HasCalculationLinkbase>
</FilingSummary>
