Stock-based Compensation - Summary of Stock-based Compensation Expense (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Allocated share based compensation	$ 146,388	$ 81,659	$ 258,683	$ 132,403
Infrastructure and trust & safety
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Allocated share based compensation	13,655	7,797	25,011	13,485
Research and development
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Allocated share based compensation	93,714	51,626	168,528	83,220
General and administrative
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Allocated share based compensation	32,974	18,929	53,769	30,176
Sales and marketing
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Allocated share based compensation	$ 6,045	$ 3,307	$ 11,375	$ 5,522