Inventories (Tables)

6 Months Ended

Jun. 30, 2021

Inventory Disclosure [Abstract]

Components of Inventories

Inventories are stated at the lower of cost ("FIFO") and net realizable value. The components of inventories were as follows (dollars in millions):

	As of
	June 30, 2021			December 31, 2020
Raw materials	$	416		$	379
Work in progress		326			292
Finished products		249			220
Inventories		991			891
Inventory valuation reserve		(90	)		(93	)
Total inventories, net of reserve	$	901		$	798