Acquisitions - Summary of Intangible Assets Subject to Amortization Acquired (Detail) - USD ($) $ in Millions	Nov. 01, 2021	Jul. 01, 2021	Oct. 13, 2020
Cisneros Interactive | Publisher Relationships
Finite-Lived Intangible Assets [Line Items]
Estimated Fair Value, Intangible Asset			$ 34.4
Weighted average remaining life in years			10 years
Cisneros Interactive | Advertiser Relationships
Finite-Lived Intangible Assets [Line Items]
Estimated Fair Value, Intangible Asset			$ 5.2
Weighted average remaining life in years			4 years
Cisneros Interactive | Trade Name
Finite-Lived Intangible Assets [Line Items]
Estimated Fair Value, Intangible Asset			$ 1.7
Weighted average remaining life in years			2 years 6 months
Cisneros Interactive | Non-Compete Agreements
Finite-Lived Intangible Assets [Line Items]
Estimated Fair Value, Intangible Asset			$ 0.4
Weighted average remaining life in years			4 years
MediaDonuts | Publisher Relationships
Finite-Lived Intangible Assets [Line Items]
Estimated Fair Value, Intangible Asset		$ 16.9
Weighted average remaining life in years		10 years
MediaDonuts | Advertiser Relationships
Finite-Lived Intangible Assets [Line Items]
Estimated Fair Value, Intangible Asset		$ 3.7
Weighted average remaining life in years		4 years
MediaDonuts | Trade Name
Finite-Lived Intangible Assets [Line Items]
Estimated Fair Value, Intangible Asset		$ 2.0
Weighted average remaining life in years		5 years
MediaDonuts | Non-Compete Agreements
Finite-Lived Intangible Assets [Line Items]
Estimated Fair Value, Intangible Asset		$ 0.2
Weighted average remaining life in years		4 years
365 Digital | Publisher Relationships
Finite-Lived Intangible Assets [Line Items]
Estimated Fair Value, Intangible Asset	$ 1.7
Weighted average remaining life in years	9 years
365 Digital | Advertiser Relationships
Finite-Lived Intangible Assets [Line Items]
Estimated Fair Value, Intangible Asset	$ 0.2
Weighted average remaining life in years	4 years
365 Digital | Trade Name
Finite-Lived Intangible Assets [Line Items]
Estimated Fair Value, Intangible Asset	$ 0.2
Weighted average remaining life in years	5 years
365 Digital | Non-Compete Agreements
Finite-Lived Intangible Assets [Line Items]
Estimated Fair Value, Intangible Asset	$ 0.1
Weighted average remaining life in years	4 years