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Acquisitions (Asset Acquisitions) (Details) - USD ($) $ in Millions | 1 Months Ended
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Feb. 28, 2022 | Mar. 31, 2021 | Jan. 31, 2021
BioMarin Pharmaceutical Inc. |  |  |
Business Acquisition [Line Items] |  |  |
Acquired IPR&D Expense | $ 110.0 |  |
Rigel Pharmaceuticals, Inc. |  |  |
Business Acquisition [Line Items] |  |  |
Acquired IPR&D Expense |  | $ 125.0 |
Precision Biosciences, Inc. |  |  |
Business Acquisition [Line Items] |  |  |
Acquired IPR&D Expense |  |  | $ 107.8

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