Earnings Per Share - Summary of Basic and Diluted Net Income (Loss) Per Share Attributable to Common Stockholders (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2021	Mar. 31, 2021	Jun. 30, 2022	Jun. 30, 2021
Numerator:
Net income (loss) attributable to AppLovin	$ (21,748)	$ (115,257)	$ 14,423	$ (10,521)	$ (137,005)	$ 3,902
Income attributable to convertible preferred stock	0		(902)		0	(731)
Income attributable to options exercised by promissory notes	0		(140)		0	(55)
Income attributable to unvested early exercised options	0		(61)		0	(12)
Income attributable to unvested RSA’s	0		(25)		0	(9)
Net income (loss) attributable to common stock	$ (21,748)		$ 13,295		$ (137,005)	$ 3,095
Denominator:
Weighted average common shares used to compute net loss per share attributable to common stockholders, basic (in shares)	373,912,724		335,619,207		372,932,509	279,326,624
Net loss per share attributable to common stockholders, basic (in dollars per share)	$ (0.06)		$ 0.04		$ (0.37)	$ 0.01
Numerator:
Net income (loss) attributable to AppLovin	$ (21,748)	$ (115,257)	$ 14,423	$ (10,521)	$ (137,005)	$ 3,902
Income attributable to convertible preferred stock	0		(859)		0	(693)
Income attributable to options exercises by promissory notes	0		(132)		0	(53)
Income attributable to unvested early exercised options	0		(59)		0	(11)
Income attributable to unvested RSA's	0		(24)		0	(8)
Net income (loss) attributable to common stock	$ (21,748)		$ 13,349		$ (137,005)	$ 3,137
Denominator:
Weighted average common shares used to compute net loss per share attributable to common stockholders, basic (in shares)	373,912,724		335,619,207		372,932,509	279,326,624
Weighted-average dilutive stock options, RSUs, and convertible security (in shares)	0		18,238,607		0	19,179,641
Weighted-average shares used in computing net income (loss) per share: Diluted (in shares)	373,912,724		353,857,814		372,932,509	298,506,265
Net income (loss) per share attributable to common stock: Diluted (in dollars per share)	$ (0.06)		$ 0.04		$ (0.37)	$ 0.01