Inventory

3 Months Ended

Mar. 31, 2019

Inventory Disclosure [Abstract]

Inventory [Text Block]

Inventory, net

(dollars in millions)	March 31, 2019		December 31, 2018
Raw materials	$	2,944	$	3,052
Work-in-process	2,819		2,673
Finished goods	4,711		4,358
	$	10,474	$	10,083

Raw materials, work-in-process and finished goods are net of valuation reserves of $1,325 million and $1,270 million as of March 31, 2019 and December 31, 2018, respectively.