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Income Taxes - Summary of Deferred Income Tax Assets and Liabilities (Details) - USD ($) $ in Millions | Dec. 31, 2022 | Dec. 31, 2021
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Deferred income tax assets: |  |
Deferred revenue | $ 143.0 | $ 10.0
Capitalized research and development | 56.3 | 0.0
Stock compensation | 25.9 | 15.4
Tax credits | 10.4 | 18.8
Loss carryforwards | 3.8 | 97.0
Other | 7.7 | 3.3
Total deferred income tax assets | 247.1 | 144.5
Deferred income tax liabilities: |  |
Property, equipment and leasehold improvements | (2.6) | (3.6)
Other | (1.0) | (1.4)
Total deferred income tax liabilities | (3.6) | (5.0)
Less valuation allowance | (243.5) | (139.5)
Net deferred income tax liability | $ 0.0 | $ 0.0

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