XML 145 R130.htm IDEA: XBRL DOCUMENT
v3.21.4

Commitments and Contingencies - (Details) - USD ($) $ in Millions | 1 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Oct. 31, 2020 | Sep. 30, 2021 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Commitments & Contingencies |  |  |  |  |
Rent expense |  |  | $ 25.7 | $ 24.8 | $ 28.0
Sublease income |  |  | 6.1 | $ 2.7 | $ 1.9
Maximum amount of new guarantee under lease agreement | $ 5.4 | $ 3.1 | $ 4.2 |  |

X
- Definition Represents the maximum amount of new guarantee under lease agreement. + References No definition available. + Details
Name: | bzfd_MaximumAmountOfNewGuaranteeUnderLeaseAgreement
Namespace Prefix: | bzfd_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The amount of rent expense. + References No definition available. + Details
Name: | bzfd_RentExpense
Namespace Prefix: | bzfd_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_CommitmentsAndContingenciesDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of sublease income excluding finance and operating lease expense. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=123408670&loc=SL77918686-209980 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 55 -Paragraph 53 -URI http://asc.fasb.org/extlink&oid=123414884&loc=SL77918982-209971 + Details
Name: | us-gaap_SubleaseIncome
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration