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Supplemental Balance Sheet Data | 6 Months Ended
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Jun. 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:
|  | June 30, 2020 |  |  |  |  |  | December 31, 2019 |  |  |  |
|  | LIFO |  | Non-LIFO |  | Total |  | LIFO |  | Non-LIFO |  | Total
Raw materials |  | $ | 122 |  |  | $ | 261 |  |  | $ | 383 |  |  | $ | 85 |  |  | $ | 236 |  |  | $ | 321 |
Work in process |  | 106 |  |  | 75 |  |  | 181 |  |  | 113 |  |  | 93 |  |  | 206 |
Finished goods |  | 448 |  |  | 679 |  |  | 1,127 |  |  | 451 |  |  | 696 |  |  | 1,147 |
Supplies and other |  | — |  |  | 277 |  |  | 277 |  |  | — |  |  | 271 |  |  | 271 |
|  | 676 |  |  | 1,292 |  |  | 1,968 |  |  | 649 |  |  | 1,296 |  |  | 1,945 |
Excess of FIFO or weighted-average cost over LIFO cost |  | (143) |  |  | — |  |  | (143) |  |  | (155) |  |  | — |  |  | (155) |
Total |  | $ | 533 |  |  | $ | 1,292 |  |  | $ | 1,825 |  |  | $ | 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:
| June 30, 2020 |  | December 31, 2019
Land | $ | 162 |  |  | $ | 165 |
Buildings | 2,863 |  |  | 2,877 |
Machinery and equipment | 13,887 |  |  | 13,946 |
Construction in progress | 826 |  |  | 851 |
| 17,738 |  |  | 17,839 |
Less accumulated depreciation | (10,372) |  |  | (10,389) |
Total | $ | 7,366 |  |  | $ | 7,450 |

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