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Cash, Cash Equivalents, and Marketable Debt Securities - Schedule of Marketable Debt Securities in Continuous Loss Position (Details) $ in Millions | Mar. 31, 2024 USD ($) Security | Dec. 31, 2023 USD ($) Security
--- | --- | ---
Schedule Of Available For Sale Securities [Line Items] |  |
Fair Value of Marketable Debt Securities in a Loss Position Less Than 12 Months | $ 84.0 | $ 47.8
Number of Marketable Debt Securities in a Loss Position Less Than 12 Months | Security | 92 | 60
Unrealized Losses Less Than 12 Months | $ 0.3 | $ 0.1
Fair Value of Marketable Debt Securities in a Loss Position 12 Months Or Longer | $ 25.8 | $ 43.9
Number of Marketable Debt Securities in a Loss Position 12 Months Or Longer | Security | 40 | 61
Unrealized Losses 12 Months Or Longer | $ 0.1 | $ 0.4
Corporate Debt Securities |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Fair Value of Marketable Debt Securities in a Loss Position Less Than 12 Months | $ 54.5 | $ 27.9
Number of Marketable Debt Securities in a Loss Position Less Than 12 Months | Security | 61 | 35
Unrealized Losses Less Than 12 Months | $ 0.2 | $ 0.1
Fair Value of Marketable Debt Securities in a Loss Position 12 Months Or Longer | $ 18.8 | $ 36.2
Number of Marketable Debt Securities in a Loss Position 12 Months Or Longer | Security | 30 | 49
Unrealized Losses 12 Months Or Longer | $ 0.1 | $ 0.3
U.S. Treasury Securities |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Fair Value of Marketable Debt Securities in a Loss Position Less Than 12 Months | $ 21.6 | $ 11.4
Number of Marketable Debt Securities in a Loss Position Less Than 12 Months | Security | 20 | 11
Unrealized Losses Less Than 12 Months | $ 0.1 | $ 0.0
Fair Value of Marketable Debt Securities in a Loss Position 12 Months Or Longer | $ 4.8 | $ 6.2
Number of Marketable Debt Securities in a Loss Position 12 Months Or Longer | Security | 7 | 10
Unrealized Losses 12 Months Or Longer | $ 0.0 | $ 0.1
U.S. Government Agency Securities |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Fair Value of Marketable Debt Securities in a Loss Position Less Than 12 Months | $ 5.4 | $ 8.5
Number of Marketable Debt Securities in a Loss Position Less Than 12 Months | Security | 8 | 14
Unrealized Losses Less Than 12 Months | $ 0.0 | $ 0.0
Fair Value of Marketable Debt Securities in a Loss Position 12 Months Or Longer | $ 2.2 | $ 1.5
Number of Marketable Debt Securities in a Loss Position 12 Months Or Longer | Security | 3 | 2
Unrealized Losses 12 Months Or Longer | $ 0.0 | $ 0.0
Certificates of Deposit |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Fair Value of Marketable Debt Securities in a Loss Position Less Than 12 Months | $ 2.5 |
Number of Marketable Debt Securities in a Loss Position Less Than 12 Months | Security | 3 |
Unrealized Losses Less Than 12 Months | $ 0.0 |
Fair Value of Marketable Debt Securities in a Loss Position 12 Months Or Longer | $ 0.0 |
Number of Marketable Debt Securities in a Loss Position 12 Months Or Longer | Security | 0 |
Unrealized Losses 12 Months Or Longer | $ 0.0 |

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