Inventories (Tables)

6 Months Ended

Jun. 30, 2018

Inventory Disclosure [Abstract]

Schedule of inventories

Inventories are comprised of the following (in millions).

	June 30, 2018		December 31, 2017
Raw materials	$	3,172	$	2,997
Work in process and other		2,213		2,315
Finished manufactured goods		4,117		4,179
Goods acquired for resale		6,692		6,696
	$	16,194	$	16,187