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Inventories (Tables) | 12 Months Ended
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Dec. 31, 2017
Inventories [Abstract] |
Schedule of Current Inventory | Inventories are comprised of the following:
| December 31
| 2016 |  | 2017
Raw materials | $ | 577.1 |  |  | $ | 735.2 |
Work in progress | 133.0 |  |  | 168.3 |
Finished goods | 180.5 |  |  | 158.3 |
| $ | 890.6 |  |  | $ | 1,061.8 |

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