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Cash, Cash Equivalents, and Marketable Debt Securities - Schedule of Marketable Debt Securities in Continuous Loss Position (Details) $ in Millions | Dec. 31, 2022 USD ($) Security | Dec. 31, 2021 USD ($) Security
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Schedule Of Available For Sale Securities [Line Items] |  |  |
Fair Value of Marketable Debt Securities in a Loss Position Less than 12 Months |  | $ 94.7 |
Number of Marketable Debt Securities in a Loss Position Less than 12 Months | Security |  | 132 |
Unrealized Losses Less Than 12 Months |  | $ 1.2 |
Fair Value of Marketable Debt Securities in a Loss Position 12 Months Or Longer |  | $ 48.5 |
Number of Marketable Debt Securities in a Loss Position 12 Months Or Longer | Security |  | 66 |
Unrealized Losses 12 Months Or Longer |  | $ 1.4 |
Fair Value of Marketable Debt Securities |  |  | $ 134.6
Number of Marketable Debt Securities in a Loss Position | Security |  |  | 187
Unrealized Losses | [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 |  | $ 77.0 |
Number of Marketable Debt Securities in a Loss Position Less than 12 Months | Security |  | 113 |
Unrealized Losses Less Than 12 Months |  | $ 1.0 |
Fair Value of Marketable Debt Securities in a Loss Position 12 Months Or Longer |  | $ 37.9 |
Number of Marketable Debt Securities in a Loss Position 12 Months Or Longer | Security |  | 50 |
Unrealized Losses 12 Months Or Longer |  | $ 1.1 |
Fair Value of Marketable Debt Securities |  |  | $ 106.9
Number of Marketable Debt Securities in a Loss Position | Security |  |  | 153
Unrealized Losses | [1] |  | $ 0.3
Certificates of Deposit |  |  |
Schedule Of Available For Sale Securities [Line Items] |  |  |
Fair Value of Marketable Debt Securities |  |  | $ 0.5
Number of Marketable Debt Securities in a Loss Position | Security |  |  | 1
Unrealized Losses |  |  |
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 |  | $ 14.5 |
Number of Marketable Debt Securities in a Loss Position Less than 12 Months | Security |  | 14 |
Unrealized Losses Less Than 12 Months |  | $ 0.2 |
Fair Value of Marketable Debt Securities in a Loss Position 12 Months Or Longer |  | $ 9.3 |
Number of Marketable Debt Securities in a Loss Position 12 Months Or Longer | Security |  | 13 |
Unrealized Losses 12 Months Or Longer |  | $ 0.3 |
Fair Value of Marketable Debt Securities |  |  | $ 22.4
Number of Marketable Debt Securities in a Loss Position | Security |  |  | 27
Unrealized Losses | [1] |  | $ 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 |  | $ 3.2 |
Number of Marketable Debt Securities in a Loss Position Less than 12 Months | Security |  | 5 |
Unrealized Losses Less Than 12 Months |  |  |
Fair Value of Marketable Debt Securities in a Loss Position 12 Months Or Longer |  | $ 1.3 |
Number of Marketable Debt Securities in a Loss Position 12 Months Or Longer | Security |  | 3 |
Unrealized Losses 12 Months Or Longer |  |  |
Fair Value of Marketable Debt Securities |  |  | $ 4.8
Number of Marketable Debt Securities in a Loss Position | Security |  |  | 6
Unrealized Losses |  |  |
[1] | For the period ended December 31, 2021, there were no marketable debt securities in a continuous loss position greater than or equal to 12 months.

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- Definition Amount of accumulated unrealized loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for 12 months or longer, without allowance for credit loss. Includes beneficial interest in securitized financial asset. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 7 -URI https://asc.fasb.org/extlink&oid=126970911&loc=d3e27337-111563 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 50 -Paragraph 5 -URI https://asc.fasb.org/extlink&oid=124269663&loc=SL82922890-210455 + Details
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