Fair Value Measurements - Additional Information (Detail) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021 USD ($)	Mar. 31, 2021 USD ($)	Sep. 30, 2021 USD ($)	Mar. 31, 2022 USD ($)	Jul. 31, 2021 USD ($)	Jun. 30, 2021 USD ($)	Dec. 31, 2020 USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Present value of contingent consideration obligation	$ 253.7		$ 253.7				$ 323.6
Measurement Input, Discount Rate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contingent consideration obligation, measurement input	0.095		0.095
Gram Games [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contingent consideration obligation					$ 75.0
Contingent consideration payable, total years			3 years
Gram Games [Member] | Research and Development Expense [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contingent consideration obligation, expense recognized	$ 0.1		$ 0.9
Rollic
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contingent consideration obligation					$ 20.0	$ 60.0	53.8
Contingent consideration payable, total years			3 years
Percentage of potential consideration acquired					20.00%	20.00%
Present value of contingent consideration obligation	$ 39.8		$ 39.8
Rollic | Measurement Input, Discount Rate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contingent consideration obligation, measurement input	0.013		0.013
Rollic | Forecast
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contingent consideration obligation				$ 40.0
Rollic | Research and Development Expense [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contingent consideration obligation, expense recognized	$ 0.1		$ 6.0
Small Giant [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contingent consideration obligation	213.9		213.9				$ 409.3
Business Combination, Contingent Consideration, Liability		$ 239.6
Small Giant [Member] | Research and Development Expense [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contingent consideration obligation, expense recognized	$ 21.3		$ 44.2