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Inventories (Tables) | 6 Months Ended
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Jun. 30, 2019
Inventory Disclosure [Abstract] |
Inventories | Inventories consisted of the following:
Millions of dollars | June 30, 2019 | December 31, 2018
Finished products and parts | $ | 2,102 |  | $ | 1,947 |
Raw materials and supplies | 1,089 |  | 934 |
Work in process | 156 |  | 147 |
Total | $ | 3,347 |  | $ | 3,028 |

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