Investments - Summary of Available-for-Sale Marketable Securities (Details) - Cash and Cash Equivalents - USD ($) $ in Millions	Jun. 30, 2025	Dec. 31, 2024
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	$ 753.8	$ 703.7
Fair Value - Level 1	753.8	703.7
Cash equivalents—money market funds
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	197.6	174.2
Fair Value - Level 1	197.6	174.2
Marketable securities—U.S. Treasury securities
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	556.2	529.5
Fair Value - Level 1	$ 556.2	$ 529.5

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

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+ Details

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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