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Inventories | 9 Months Ended
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Sep. 30, 2021
Inventory Disclosure [Abstract] |
Inventories | Inventories Inventories consist of the following:
| September 30, |  | December 31,
(In millions) | 2021 |  | 2020
Raw materials | $ | 646.3 |  |  | $ | 459.4 |
Work-in-process | 843.7 |  |  | 904.6 |
Finished goods | 60.1 |  |  | 121.7 |
Deferred costs | 503.7 |  |  | 430.9 |
| $ | 2,053.8 |  |  | $ | 1,916.6 |
Deferred costs represent the costs of product manufactured and shipped to the Company's collaborators for which recognition of revenue has been deferred. For the three and nine months ended September 30, 2021, Cost of goods sold included inventory write-offs and reserves totaling $38.7 million and $188.0 million, respectively. For the three and nine months ended September 30, 2020, Cost of goods sold included inventory write-offs and reserves totaling $11.8 million and $23.6 million, respectively.

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- Definition The entire disclosure for inventory. Includes, but is not limited to, the basis of stating inventory, the method of determining inventory cost, the classes of inventory, and the nature of the cost elements included in inventory. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 330 -URI http://asc.fasb.org/topic&trid=2126998 + Details
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