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Supplemental Balance Sheet Data | 3 Months Ended
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Mar. 31, 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:
|  | March 31, 2018 |  | December 31, 2017
|  | LIFO |  | Non-LIFO |  | Total |  | LIFO |  | Non-LIFO |  | Total
Raw materials |  | $ | 86 |  |  | $ | 266 |  |  | $ | 352 |  |  | $ | 87 |  |  | $ | 258 |  |  | $ | 345 |
Work in process |  | 102 |  |  | 101 |  |  | 203 |  |  | 110 |  |  | 103 |  |  | 213 |
Finished goods |  | 412 |  |  | 685 |  |  | 1,097 |  |  | 421 |  |  | 684 |  |  | 1,105 |
Supplies and other |  | — |  |  | 304 |  |  | 304 |  |  | — |  |  | 303 |  |  | 303 |
|  | 600 |  |  | 1,356 |  |  | 1,956 |  |  | 618 |  |  | 1,348 |  |  | 1,966 |
Excess of FIFO or weighted-average cost over LIFO cost |  | (178 | ) |  | — |  |  | (178 | ) |  | (176 | ) |  | — |  |  | (176 | )
Total |  | $ | 422 |  |  | $ | 1,356 |  |  | $ | 1,778 |  |  | $ | 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:
| March 31, 2018 |  | December 31, 2017
Land | $ | 175 |  |  | $ | 173 |
Buildings | 2,861 |  |  | 2,830 |
Machinery and equipment | 14,604 |  |  | 14,612 |
Construction in progress | 323 |  |  | 300 |
| 17,963 |  |  | 17,915 |
Less accumulated depreciation | (10,635 | ) |  | (10,479 | )
Total | $ | 7,328 |  |  | $ | 7,436 |

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