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Acquisitions and Dispositions - Additional Information (Details) - USD ($)			3 Months Ended
	Dec. 03, 2021	Feb. 16, 2021	Mar. 31, 2021	Mar. 31, 2022	Dec. 31, 2021
Acquisitions and Dispositions
Identifiable intangible assets acquired of goodwill	$ 188,600,000			$ 194,050,000	$ 194,881,000
cash investment			$ 35,000,000
Developed technology
Acquisitions and Dispositions
Intangible assets acquired, estimated useful life	3 years
Trademarks and trade names
Acquisitions and Dispositions
Intangible assets acquired, estimated useful life	15 years
C Acquisition
Acquisitions and Dispositions
Number of shares issued for acquisition		2,639,322
Percentage of membership interests acquired	100.00%
Cash purchase price	$ 294,166
Identifiable intangible assets acquired of goodwill	188,560
C Acquisition \| C Acquisition Purchase Agreement [Member]
Acquisitions and Dispositions
Cash purchase price	$ 200,000,000.0
C Acquisition \| Class A common stock
Acquisitions and Dispositions
Number of shares issued for acquisition	10,000,000
Stock issued price per share	$ 9.62
HuffPost
Acquisitions and Dispositions
Number of shares issued		3,838,710
Percentage of membership interests acquired		100.00%
Cash purchase price		$ 23,574
Identifiable intangible assets acquired of goodwill		$ 5,500,000
HuffPost \| Developed technology
Acquisitions and Dispositions
Intangible assets acquired, estimated useful life		3 years
HuffPost \| Trademarks and trade names
Acquisitions and Dispositions
Intangible assets acquired, estimated useful life		15 years
Verizon Verizon Communications Inc.
Acquisitions and Dispositions
Number of shares issued for acquisition		6,478,032
cash investment		$ 35,000,000.0
Legacy BuzzFeed
Acquisitions and Dispositions
Number of shares issued for acquisition		8,625,234
Stock issued price per share		$ 2.79