Inventories (Tables)

6 Months Ended

Jun. 30, 2019

Inventory Disclosure [Abstract]

Components of Inventories

Inventories are stated at the lower of cost (according to first-in-first-out basis, "FIFO") and net realizable value. The components of inventories were as follows:

	As of
(Dollars in millions)	June 30, 2019			December 31, 2018
Raw materials	$	114		$	108
Work in progress	10			15
Finished products	58			71
Inventories	182			194
Inventory valuation reserve	(24		)	(23		)
Total inventories, net of reserve	$	158		$	172