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, 2023	Mar. 31, 2023	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2023	Jun. 30, 2022
Numerator:
Net income (loss) attributable to AppLovin	$ 80,357	$ (4,518)	$ (21,748)	$ (115,257)	$ 75,839	$ (137,005)
Income attributable to options exercises by promissory notes	(314)		0		(290)	0
Income attributable to unvested early exercised options	(4)		0		(9)	0
Net income (loss) attributable to AppLovin common stockholders—Basic	$ 80,039		$ (21,748)		$ 75,540	$ (137,005)
Denominator:
Weighted average common shares used to compute net loss per share attributable to AppLovin common stockholders, basic (in shares)	356,957,059		373,912,724		365,013,736	372,932,509
Net loss per share attributable to AppLovin common stockholders, basic (in dollars per share)	$ 0.22		$ (0.06)		$ 0.21	$ (0.37)
Numerator:
Net income (loss) attributable to AppLovin	$ 80,357	$ (4,518)	$ (21,748)	$ (115,257)	$ 75,839	$ (137,005)
Income attributable to options exercises by promissory notes	(306)		0		(284)	0
Income attributable to unvested early exercised options	(4)		0		(8)	0
Net income (loss) attributable to AppLovin common stockholders—Basic	$ 80,047		$ (21,748)		$ 75,547	$ (137,005)
Denominator:
Weighted average common shares used to compute net loss per share attributable to AppLovin common stockholders, basic (in shares)	356,957,059		373,912,724		365,013,736	372,932,509
Weighted-average dilutive stock options and RSUs (in shares)	9,383,216		0		8,008,464	0
Weighted-average shares used in computing net income (loss) per share—Diluted (in shares)	366,340,275		373,912,724		373,022,200	372,932,509
Net income (loss) per share attributable to AppLovin common stockholders—Diluted (in dollars per share)	$ 0.22		$ (0.06)		$ 0.20	$ (0.37)