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Supplemental Balance Sheet Data | 9 Months Ended
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Sep. 30, 2021
Statement of Financial Position [Abstract] |
Additional Financial Information Disclosure | Supplemental Balance Sheet Data The following schedule presents a summary of inventories by major class:
|  | September 30, 2021 |  | December 31, 2020
|  | LIFO |  | Non-LIFO |  | Total |  | LIFO |  | Non-LIFO |  | Total
Raw materials |  | $ | 141 |  |  | $ | 342 |  |  | $ | 483 |  |  | $ | 131 |  |  | $ | 263 |  |  | $ | 394 |
Work in process |  | 143 |  |  | 91 |  |  | 234 |  |  | 103 |  |  | 86 |  |  | 189 |
Finished goods |  | 545 |  |  | 776 |  |  | 1,321 |  |  | 453 |  |  | 749 |  |  | 1,202 |
Supplies and other |  | — |  |  | 276 |  |  | 276 |  |  | — |  |  | 263 |  |  | 263 |
|  | 829 |  |  | 1,485 |  |  | 2,314 |  |  | 687 |  |  | 1,361 |  |  | 2,048 |
Excess of FIFO or weighted-average cost over LIFO cost |  | (216) |  |  | — |  |  | (216) |  |  | (145) |  |  | — |  |  | (145) |
Total |  | $ | 613 |  |  | $ | 1,485 |  |  | $ | 2,098 |  |  | $ | 542 |  |  | $ | 1,361 |  |  | $ | 1,903 |
Inventories are valued at the lower of cost or net realizable value, determined on the FIFO or weighted-average cost methods, and at the lower of cost or market, determined on the LIFO cost method. The following schedule presents a summary of property, plant and equipment, net:
| September 30, 2021 |  | December 31, 2020
Land | $ | 169 |  |  | $ | 174 |
Buildings | 2,959 |  |  | 2,932 |
Machinery and equipment | 14,514 |  |  | 14,382 |
Construction in progress | 700 |  |  | 845 |
| 18,342 |  |  | 18,333 |
Less accumulated depreciation | (10,378) |  |  | (10,291) |
Total | $ | 7,964 |  |  | $ | 8,042 |

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