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Inventories | 12 Months Ended
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Dec. 31, 2023
Inventory Disclosure [Abstract] |
Inventories | Inventories We use the last-in, first-out (LIFO) method for the majority of our inventories located in the continental U.S. Other inventories are valued by the first-in, first-out (FIFO) method. FIFO cost approximates current replacement cost. Inventories measured using LIFO must be valued at the lower of cost or market. Inventories measured using FIFO must be valued at the lower of cost or net realizable value. Inventories at December 31 consisted of the following:
| 2023 |  | 2022
Finished products | $ | 791.7 |  |  | $ | 901.2 |
Work in process | 3,248.6 |  |  | 2,597.7 |
Raw materials and supplies | 1,630.1 |  |  | 801.9 |
Total (approximates replacement cost) | 5,670.4 |  |  | 4,300.8 |
Increase to LIFO cost | 102.4 |  |  | 8.9 |
Inventories | $ | 5,772.8 |  |  | $ | 4,309.7 |
Inventories valued under the LIFO method comprised $1.77 billion and $1.23 billion of total inventories at December 31, 2023 and 2022, respectively. We recognized a net inventory impairment charge related to our COVID-19 antibodies of $339.7 million during the year ended December 31, 2021 in cost of sales in our consolidated statements of operations primarily due to the combination of changes to demand from U.S. and international governments, including changes to our agreement with the U.S. government, and near-term expiry dates of COVID-19 antibodies.

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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 -Topic 330 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org//330/tableOfContent + Details
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