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Stock-Based Compensation - Restricted Stock and Restricted Stock Units (Details) - Stock options and RSUs - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Stock-Based Compensation
Allocated share-based compensation expense	$ 14.3	$ 11.8	$ 27.1	$ 22.3
Research and development
Stock-Based Compensation
Allocated share-based compensation expense	6.7	4.4	12.3	8.1
Selling, general and administrative
Stock-Based Compensation
Allocated share-based compensation expense	$ 7.6	$ 7.4	$ 14.8	$ 14.2

X

- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (h)(1)(i)
-URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901

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+ References

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