Acquisitions and Dispositions - Narrative (Details)				1 Months Ended			2 Months Ended	3 Months Ended		6 Months Ended	9 Months Ended
	Apr. 01, 2022 USD ($) shares	Jan. 01, 2022 USD ($)	Apr. 20, 2021 USD ($)	Aug. 31, 2021 USD ($)	Jun. 30, 2021 USD ($)	Apr. 30, 2021 USD ($) transaction	Jun. 30, 2021 USD ($)	Sep. 30, 2022 USD ($)	Sep. 30, 2021 USD ($)	Sep. 30, 2022 USD ($)	Sep. 30, 2022 USD ($)	Sep. 30, 2021 USD ($)
Business Acquisition [Line Items]
Consideration transferred, liabilities incurred											$ 0	$ 342,170,000
Impairment charge								$ 27,700,000			27,700,000
Certain Mobile Game Apps
Business Acquisition [Line Items]
Contingent consideration, costs								23,200,000			98,700,000
Acquistion of Certain Mobile Game Apps
Business Acquisition [Line Items]
Contingent consideration, costs									$ 9,900,000			97,500,000
Number of asset acquisitions | transaction						2
Payments for asset acquisitions					$ 130,000,000	$ 300,000,000			$ 28,800,000			$ 36,800,000
Asset acquisition, transaction cost				$ 150,000,000	4,000,000	6,000,000
Asset acquisition, consideration transferred					$ 134,000,000	$ 306,000,000
Acquired asset, amortization period				6 years	9 years	8 years
Development services agreement, term					4 years	4 years
Contingent consideration, earn-out term						4 years
Contingent consideration, earn-out payment						$ 50,000,000
Asset acquisition, assets acquired and liabilities assumed, net				$ 150,000,000
Transitional Services Agreement
Business Acquisition [Line Items]
Expenses recognized											7,000,000
Wurl, Inc.
Business Acquisition [Line Items]
Consideration transferred	$ 378,200,000
Consideration paid	219,300,000
Business combination, equity interests issued and issuable	137,400,000
Consideration transferred, liabilities incurred	$ 21,500,000
Indemnity holdback, period	18 months
Acquisition-related expense and transaction bonus	$ 1,900,000
Revenue of acquiree since acquisition date										$ 22,700,000
Pretax loss of acquiree since acquisition date										8,700,000
Wurl, Inc. | Class A Common Stock
Business Acquisition [Line Items]
Business combination, equity interests issued and issuable (in shares) | shares	2,579,692
Cash and equity interests issued and issuable, earnout	$ 600,000,000
MoPub
Business Acquisition [Line Items]
Consideration paid		$ 1,030,000,000.00
Acquisition-related expense and transaction bonus											14,400,000
Liabilities assumed in transaction								0		0	0
Expected tax deductible amount for goodwill								$ 694,500,000		$ 694,500,000	$ 694,500,000
Adjust GmbH
Business Acquisition [Line Items]
Consideration transferred			$ 967,800,000
Consideration paid			578,000,000
Consideration transferred, liabilities incurred			342,200,000
Revenue of acquiree since acquisition date							$ 49,400,000
Pretax loss of acquiree since acquisition date							$ 29,600,000
Expected tax deductible amount for goodwill			692,500,000
Fair value of cash holdback			47,600,000
Transaction costs			3,100,000
Adjust GmbH | Reported Value Measurement
Business Acquisition [Line Items]
Consideration transferred			980,000,000
Business combination, equity interests issued and issuable			352,000,000
Consideration transferred, liabilities incurred			$ 50,000,000