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Inventory | 6 Months Ended
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Jun. 30, 2022
Inventory Disclosure [Abstract] |
Inventory | The components of inventory are summarized as follows:
(In millions) |  | As of June 30, 2022 |  | As of December 31, 2021
Raw materials |  | $ | 378.0 |  |  | $ | 349.6 |
Work in process(1) |  | 706.3 |  |  | 814.0 |
Finished goods |  | 209.9 |  |  | 187.9 |
Total inventory |  | $ | 1,294.2 |  |  | $ | 1,351.5 |
(1) Work in process inventory as of June 30, 2022, includes approximately $71.5 million related to lecanemab. In April 2022 the Centers for Medicare and Medicaid Services (CMS) released the final National Coverage Decision (NCD) for the class of anti-amyloid treatments in Alzheimer’s disease, including ADUHELM. The final NCD confirmed coverage with evidence development, in which patients with Medicare can only access treatment if they are part of an approved clinical trial. We expect that this decision will reduce future demand for ADUHELM to a minimal level. During the first quarter of 2022 we wrote-off approximately $275.0 million of inventory related to ADUHELM, as a result of this CMS decision, which was recognized in cost of sales within our condensed consolidated statements of income for the six months ended June 30, 2022. We have recognized approximately $136.0 million related to Eisai's 45.0% share of these charges in collaboration profit (loss) sharing within our condensed consolidated statements of income for the six months ended June 30, 2022. During the fourth quarter of 2021 we wrote-off approximately $120.0 million of inventory in excess of forecasted demand related to ADUHELM, which was recognized in cost of sales within our condensed consolidated statements of income. We have recognized approximately $59.0 million related to Eisai's 45.0% share of these charges in collaboration profit (loss) sharing within our condensed consolidated statements of income for the year ended December 31, 2021. As of June 30, 2022, our total ADUHELM inventory was de minimis. As of December 31, 2021, we had approximately $223.0 million of ADUHELM inventory. For additional information please read Note 17, Collaborative and Other Relationships, to these condensed consolidated financial statements.

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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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