Inventories (Tables)

12 Months Ended

Dec. 31, 2017

Inventory Disclosure [Abstract]

Components of Inventory

The components of inventory follow:

	As of December 31,
(MILLIONS OF DOLLARS)	2017		2016
Finished goods	$	788	$	799
Work-in-process	484		499
Raw materials and supplies	155		204
Inventories	$	1,427	$	1,502