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Stock-Based Compensation - Schedule of Allocation of Employee Stock-Based Compensation (Details) - Stock options and RSUs - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense	$ 74.8	$ 57.7	$ 46.0
Research and development expenses
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense	35.9	26.4	17.8
Selling, general and administrative expenses
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense	$ 38.9	$ 31.3	$ 28.2

X

- Definition

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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