Investment Securities - Additional Information (Detail) $ in Millions	Jun. 30, 2023 USD ($)	Dec. 31, 2022 USD ($)
Debt Securities, Available-for-Sale [Line Items]
Investment securities, available for sale, noncurrent	$ 25.5	$ 71.5
Percentage of fair value instruments	(0.01)
Aggregate related fair value of investments with unrealized losses	$ 355.4	438.3
Aggregate fair value of investments with unrealized losses	83.8	49.1
Continuous unrealized losses, value remaining	271.6	$ 389.2
U.S. Government Agency Securities
Debt Securities, Available-for-Sale [Line Items]
Aggregate related fair value of investments with unrealized losses	194.5
Certificates of Deposit
Debt Securities, Available-for-Sale [Line Items]
Aggregate related fair value of investments with unrealized losses	5.1
Commercial Paper
Debt Securities, Available-for-Sale [Line Items]
Aggregate related fair value of investments with unrealized losses	74.3
Corporate Notes/Bonds
Debt Securities, Available-for-Sale [Line Items]
Aggregate related fair value of investments with unrealized losses	$ 81.5

Debt Securities, Available For Sale, Unrealized Losses, Percentage Of Fair Value Of Investments

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Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), classified as noncurrent.

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