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Supplemental Balance Sheet Data | 9 Months Ended
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Sep. 30, 2020
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, 2020 |  |  |  |  |  | December 31, 2019 |  |  |  |
|  | LIFO |  | Non-LIFO |  | Total |  | LIFO |  | Non-LIFO |  | Total
Raw materials |  | $ | 124 |  |  | $ | 251 |  |  | $ | 375 |  |  | $ | 85 |  |  | $ | 236 |  |  | $ | 321 |
Work in process |  | 110 |  |  | 89 |  |  | 199 |  |  | 113 |  |  | 93 |  |  | 206 |
Finished goods |  | 433 |  |  | 683 |  |  | 1,116 |  |  | 451 |  |  | 696 |  |  | 1,147 |
Supplies and other |  | — |  |  | 242 |  |  | 242 |  |  | — |  |  | 271 |  |  | 271 |
|  | 667 |  |  | 1,265 |  |  | 1,932 |  |  | 649 |  |  | 1,296 |  |  | 1,945 |
Excess of FIFO or weighted-average cost over LIFO cost |  | (145) |  |  | — |  |  | (145) |  |  | (155) |  |  | — |  |  | (155) |
Total |  | $ | 522 |  |  | $ | 1,265 |  |  | $ | 1,787 |  |  | $ | 494 |  |  | $ | 1,296 |  |  | $ | 1,790 |
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, 2020 |  | December 31, 2019
Land | $ | 164 |  |  | $ | 165 |
Buildings | 2,914 |  |  | 2,877 |
Machinery and equipment | 14,094 |  |  | 13,946 |
Construction in progress | 801 |  |  | 851 |
| 17,973 |  |  | 17,839 |
Less accumulated depreciation | (10,476) |  |  | (10,389) |
Total | $ | 7,497 |  |  | $ | 7,450 |

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