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Inventory
 12 Months Ended
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.