Consolidated Statements of Operations (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Revenue:
Total revenue	$ 691.2	$ 680.3
Costs and expenses:
Cost of revenue	252.2	260.7
Research and development	112.4	140.7
Sales and marketing	251.1	248.7
General and administrative	60.5	35.7
Total costs and expenses	676.2	685.8
Income (loss) from operations	15.0	(5.5)
Interest income	0.9	1.7
Interest expense	(3.1)	(14.7)
Other income (expense), net	(15.7)	8.9
Income (loss) before income taxes	(2.9)	(9.6)
Provision for (benefit from) income taxes	21.6	13.4
Net income (loss)	$ (24.5)	$ (23.0)
Net income (loss) per share attributable to common stockholders:
Basic	$ (0.02)	$ (0.02)
Diluted	$ (0.02)	$ (0.02)
Weighted-average common shares used to compute net income (loss) per share attributable to common stockholders:
Basic	1,133.2	1,084.4
Diluted	1,133.2	1,084.4
Online Game [Member]
Revenue:
Total revenue	$ 537.7	$ 557.0
Advertising and Other [Member]
Revenue:
Total revenue	$ 153.5	$ 123.3