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Inventories (Tables) | 9 Months Ended
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Sep. 30, 2020
Inventory Disclosure [Abstract] |
Breakdown of Inventories | The following table provides a breakdown of inventories at September 30, 2020 and December 31, 2019 (in thousands):
| September 30, |  | December 31,
| 2020 |  | 2019
Finished goods | $ | 525,071 |  |  | $ | 495,639 |
Raw materials and work in process(a) | 228,637 |  |  | 205,781 |
Stores, supplies and other | 74,372 |  |  | 67,564 |
Total | $ | 828,080 |  |  | $ | 768,984 |
(a)Included $124.3 million and $109.3 million at September 30, 2020 and December 31, 2019, respectively, of work in process in our Lithium segment.

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