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Inventory | 12 Months Ended
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Dec. 31, 2017
Inventories [Abstract] |
Inventory |
Note 12 Inventory
FOR THE YEAR ENDED DECEMBER 31 | 2017 |  | 2016 |
Finished goods | 322 |  | 333 |
Work in progress | 76 |  | 85 |
Provision | (18 | ) | (15 | )
Total inventory | 380 |  | 403 |
The total amount of inventory subsequently recognized as an expense in cost of revenues was $2,910 million and $2,689 million for 2017 and 2016, respectively.

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