Inventories (Tables)

9 Months Ended

Sep. 30, 2018

Inventory Disclosure [Abstract]

Schedule of inventories

Inventories are comprised of the following (in millions).

	September 30, 2018		December 31, 2017
Raw materials	$	3,326	$	2,997
Work in process and other		2,232		2,315
Finished manufactured goods		4,150		4,179
Goods acquired for resale		7,085		6,696
	$	16,793	$	16,187