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Supplemental Balance Sheet Data | 6 Months Ended
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Jun. 30, 2018
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, 2018 |  | December 31, 2017
|  | LIFO |  | Non-LIFO |  | Total |  | LIFO |  | Non-LIFO |  | Total
Raw materials |  | $ | 86 |  |  | $ | 247 |  |  | $ | 333 |  |  | $ | 87 |  |  | $ | 258 |  |  | $ | 345 |
Work in process |  | 108 |  |  | 99 |  |  | 207 |  |  | 110 |  |  | 103 |  |  | 213 |
Finished goods |  | 453 |  |  | 654 |  |  | 1,107 |  |  | 421 |  |  | 684 |  |  | 1,105 |
Supplies and other |  | — |  |  | 280 |  |  | 280 |  |  | — |  |  | 303 |  |  | 303 |
|  | 647 |  |  | 1,280 |  |  | 1,927 |  |  | 618 |  |  | 1,348 |  |  | 1,966 |
Excess of FIFO or weighted-average cost over LIFO cost |  | (177 | ) |  | — |  |  | (177 | ) |  | (176 | ) |  | — |  |  | (176 | )
Total |  | $ | 470 |  |  | $ | 1,280 |  |  | $ | 1,750 |  |  | $ | 442 |  |  | $ | 1,348 |  |  | $ | 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, 2018 |  | December 31, 2017
Land | $ | 169 |  |  | $ | 173 |
Buildings | 2,791 |  |  | 2,830 |
Machinery and equipment | 14,120 |  |  | 14,612 |
Construction in progress | 383 |  |  | 300 |
| 17,463 |  |  | 17,915 |
Less accumulated depreciation | (10,417 | ) |  | (10,479 | )
Total | $ | 7,046 |  |  | $ | 7,436 |

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