Goodwill and Intangible Assets, Net - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Finite Lived Intangible Assets [Line Items]
Weighted-average remaining useful lives of acquired intangible assets			4 years 2 months 12 days
Trademarks, Branding and Domain Names [Member]
Finite Lived Intangible Assets [Line Items]
Indefinite-lived intangible assets	$ 6.1		$ 6.1		$ 6.1
Weighted-average remaining useful lives of acquired intangible assets			5 years 9 months 18 days
Other Intangible Assets
Finite Lived Intangible Assets [Line Items]
Amortization Expense	$ 54.6	$ 46.0	$ 159.5	$ 78.7
Developed Technology [Member]
Finite Lived Intangible Assets [Line Items]
Weighted-average remaining useful lives of acquired intangible assets			3 years 9 months 18 days
Developer and Customer Relationships [Member]
Finite Lived Intangible Assets [Line Items]
Weighted-average remaining useful lives of acquired intangible assets			3 years 1 month 6 days