Earnings Per Share - Schedule 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, 2024	Mar. 31, 2024	Jun. 30, 2023	Mar. 31, 2023	Jun. 30, 2024	Jun. 30, 2023
Numerator:
Net income attributable to AppLovin	$ 309,969	$ 236,183	$ 80,357	$ (4,518)	$ 546,152	$ 75,839
Income attributable to options exercised by promissory notes	(79)		(314)		(911)	(290)
Income attributable to common stock subject to share repurchase agreements	0		0		(840)	0
Income attributable to unvested early exercised options	0		(4)		(1)	(9)
Net income (loss) attributable to common stock—Basic	$ 309,890		$ 80,039		$ 544,400	$ 75,540
Denominator:
Weighted-average shares used in computing net income (loss) per share—Basic (in shares)	335,681,788		356,957,059		335,785,864	365,013,736
Net income (loss) per share attributable to common stock—Basic (in dollars per share)	$ 0.92		$ 0.22		$ 1.62	$ 0.21
Numerator:
Net income attributable to AppLovin	$ 309,969	$ 236,183	$ 80,357	$ (4,518)	$ 546,152	$ 75,839
Income attributable to options exercised by promissory notes	(76)		(306)		(878)	(284)
Income attributable to common stock subject to share repurchase agreements	0		0		(810)	0
Income attributable to unvested early exercised options	0		(4)		(1)	(8)
Net income attributable to Class A and Class B common stockholders—Diluted	$ 309,893		$ 80,047		$ 544,463	$ 75,547
Denominator:
Weighted-average shares used in computing net income (loss) per share—Basic (in shares)	335,681,788		356,957,059		335,785,864	365,013,736
Weighted-average dilutive stock awards (in shares)	12,282,413		9,383,216		12,541,984	8,008,464
Weighted-average shares used in computing net income (loss) per share—Diluted (in shares)	347,964,201		366,340,275		348,327,848	373,022,200
Net income (loss) per share attributable to AppLovin common stockholders—Diluted (in dollars per share)	$ 0.89		$ 0.22		$ 1.56	$ 0.20