Inventories and Contracts in Progress (Tables)

3 Months Ended

Mar. 31, 2018

Inventory Disclosure [Abstract]

Schedule of Inventory, Current [Table Text Block]

(dollars in millions)	March 31, 2018		December 31, 2017
Raw materials	$	2,079	$	2,038
Work-in-process	2,526		3,366
Finished goods	4,333		3,845
Contracts in progress	—		10,205
	8,938		19,454
Less:
Progress payments, secured by lien, on U.S. Government contracts	—		(236		)
Billings on contracts in progress	—		(9,337		)
	$	8,938	$	9,881