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Stock-Based Compensation - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Millions	1 Months Ended	3 Months Ended		9 Months Ended
	Jul. 31, 2021	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Unrecognized compensation cost related to common stock options		$ 146.4		$ 146.4
Share based payment weighted average period				2 years 7 months 6 days
Weighted average grant-date fair value of stock options granted		$ 51.79	$ 32.24	$ 51.79	$ 21.7
Aggregate intrinsic value of stock options exercised		$ 32.5	$ 8.5	$ 72.6	$ 16.6
2021 Stock Option and Incentive Plan [Member]
Stock awards granted, expiration period	10 years
2021 Stock Option and Incentive Plan [Member] \| Common Class A [Member]
Shares available for future issuance		6,915,646		6,915,646
2021 Employee Stock Purchase Plan [Member]
Number of shares issued				5,237
2021 Employee Stock Purchase Plan [Member] \| Common Class A [Member]
Shares available for future issuance		1,873,832		1,873,832
Maximum [Member] \| 2021 Stock Option and Incentive Plan [Member]
Stock awards granted, vesting period	4 years
Minimum [Member] \| 2021 Stock Option and Incentive Plan [Member]
Stock awards granted, vesting period	3 years