| Schedule of Inventory, Current [Table Text Block] |
| | | | | | | | | (Dollars in millions) | September 30, 2016 | | December 31, 2015 | Raw materials | $ | 2,209 |
| | $ | 2,037 |
| Work-in-process | 2,807 |
| | 2,422 |
| Finished goods | 3,438 |
| | 3,183 |
| Contracts in progress | 9,580 |
| | 8,668 |
| | 18,034 |
| | 16,310 |
| Less: | | | | Progress payments, secured by lien, on U.S. Government contracts | (157 | ) | | (239 | ) | Billings on contracts in progress | (8,796 | ) | | (7,936 | ) | | $ | 9,081 |
| | $ | 8,135 |
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