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Inventories (Tables)
 3 Months Ended
Apr. 02, 2017
Inventory Disclosure [Abstract]  
Components of Inventory
The components of inventory are as follows:
 
 
April 2,

 
December 31,

(MILLIONS OF DOLLARS)
 
2017

 
2016

Finished goods
 
$
800

 
$
799

Work-in-process
 
531

 
499

Raw materials and supplies
 
204

 
204

Inventories
 
$
1,535

 
$
1,502