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Income Taxes - Additional Information (Detail) - USD ($)
$ in Millions
3 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Dec. 31, 2020
Income Tax Disclosure [Abstract]      
Gross unrecognized tax benefits $ 156.6   $ 100.7
The total amount of unrecognized tax benefits that would impact tax rate, if recognized $ 103.7    
Effective tax rate 19.50% 17.50%