Basis of Presentation and Summary of Significant Accounting Policies - Additional Information (Detail) $ in Thousands		3 Months Ended				6 Months Ended		12 Months Ended
		Jun. 30, 2023 USD ($)	Sep. 30, 2022	Jun. 30, 2022 USD ($)	Mar. 31, 2022	Jun. 30, 2023 USD ($)	Jun. 30, 2022 USD ($)	Dec. 31, 2021	Jan. 31, 2023 robux	Jan. 31, 2022 robux	Jan. 30, 2022 robux
Disaggregation of Revenue [Line Items]
Average lifetime of a paying user		28 months	28 months		25 months	28 months		23 months
Decrease in revenue		$ 680,766		$ 591,207		$ 1,336,110	$ 1,128,341
Decrease in cost of revenue	[1]	$ 162,029		143,157		$ 313,870	278,789
Developer Exchange Program, minimum virtual currency earned requirement | robux									30,000	50,000	100,000
Service Life
Disaggregation of Revenue [Line Items]
Decrease in revenue				(40,900)			(123,500)
Decrease in cost of revenue				$ (9,400)			$ (29,000)

[1] Depreciation of servers and infrastructure equipment included in infrastructure and trust & safety.