Inventories, Net

12 Months Ended

Dec. 31, 2018

Inventory Disclosure [Abstract]

Inventories, Net

7. Inventories, Net

Inventories, net of reserves, by category were as follows:

	December 31,
(Dollars in millions)	2018		2017
Raw materials, components and supplies	$	131	$	144
Work in process	47		47
Finished goods	847		1,043
	$	1,025	$	1,234

During 2018, 2017 and 2016, we recognized inventory write-off and other related charges, including excess and obsolete charges, totaling $80 million, $540 million and $269 million, respectively. These charges were largely attributable to the downturn in the oil and gas industry, where certain inventory has been deemed commercially unviable or technologically obsolete considering current and future demand.