Inventories

12 Months Ended

Dec. 31, 2017

Inventory Disclosure [Abstract]

Inventories

. Inventories

Inventories at Lower of Cost or Realizable Value. The table below presents the components of inventories at the lower of cost (first-in, first-out or average cost) or realizable value.

	December 31,
	2017		2016
	(in millions)
Raw materials, components and sub-assemblies	$	184	$	165
Work in process	98		106
Finished goods	107		59
Total	$	389	$	330