Inventories (Tables)

3 Months Ended

Mar. 31, 2021

Inventory Disclosure [Abstract]

Schedule of inventories

Inventories are comprised of the following (in millions).

	March 31, 2021		December 31, 2020
Raw materials	$	4,914	$	4,821
Work in process and other		2,727		2,541
Finished manufactured goods		4,528		4,412
Goods acquired for resale		6,717		7,434
	$	18,886	$	19,208