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Inventories and Contracts in Progress (Tables) | 12 Months Ended
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Dec. 31, 2017
Inventory Disclosure [Abstract] |
Inventory Table [Table Text Block] |
(dollars in millions) | 2017 |  | 2016
Raw materials | $ | 2,038 |  |  | $ | 2,040 |
Work-in-process | 3,366 |  |  | 2,787 |
Finished goods | 3,845 |  |  | 3,305 |
Contracts in progress | 10,205 |  |  | 9,395 |
| 19,454 |  |  | 17,527 |
Less: |  |  |
Progress payments, secured by lien, on U.S. Government contracts | (236 | ) |  | (130 | )
Billings on contracts in progress | (9,337 | ) |  | (8,693 | )
| $ | 9,881 |  |  | $ | 8,704 |

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