Inventories (Tables)

6 Months Ended

Jun. 30, 2018

Inventory Disclosure [Abstract]

Summary of Inventories

Inventories as of June 30, 2018 and December 31, 2017 consist of the following:

	June 30, 2018		December 31, 2017
	(in millions)
Raw materials	$	1,380	$	1,278
Work-in-process		747		601
Finished goods		5,004		4,573
Total inventories	$	7,131	$	6,452