Restructuring - Schedule of Restructuring Reserve (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Oct. 01, 2017	Sep. 30, 2018	Oct. 01, 2017
Restructuring Reserve [Roll Forward]
Restructuring charges	$ 88	$ 69	$ 187	$ 165
Medical Devices
Restructuring Reserve [Roll Forward]
Reserve balance beginning			267
Restructuring charges	101		473
Payments for Restructuring			(417)
Restructuring Reserve, Settled without Cash			(100)
Reserve balance ending	223		223
Medical Devices | Employee Severance
Restructuring Reserve [Roll Forward]
Reserve balance beginning			229
Restructuring charges			0
Payments for Restructuring			(29)
Restructuring Reserve, Settled without Cash			0
Reserve balance ending	200		200
Medical Devices | Asset Write-off
Restructuring Reserve [Roll Forward]
Reserve balance beginning			0
Restructuring charges			100
Payments for Restructuring			0
Restructuring Reserve, Settled without Cash			(100)
Reserve balance ending	0		0
Medical Devices | Other Restructuring
Restructuring Reserve [Roll Forward]
Reserve balance beginning			38
Restructuring charges			373
Payments for Restructuring			(388)
Restructuring Reserve, Settled without Cash			0
Reserve balance ending	$ 23		$ 23