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Restructuring - Schedule of Restructuring Reserve (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jul. 01, 2018	Jul. 02, 2017	Jul. 01, 2018	Jul. 02, 2017
Restructuring Reserve [Roll Forward]
Restructuring charges	$ 57	$ 11	$ 99	$ 96
Medical Devices
Restructuring Reserve [Roll Forward]
Reserve balance beginning			267
Restructuring charges	117		283
Payments for Restructuring			(264)
Restructuring Reserve, Settled without Cash			(49)
Reserve balance ending	237		237
Medical Devices \| Employee Severance
Restructuring Reserve [Roll Forward]
Reserve balance beginning			229
Restructuring charges			0
Payments for Restructuring			(23)
Restructuring Reserve, Settled without Cash			0
Reserve balance ending	206		206
Medical Devices \| Asset Write-off
Restructuring Reserve [Roll Forward]
Reserve balance beginning			0
Restructuring charges			49
Payments for Restructuring			0
Restructuring Reserve, Settled without Cash			(49)
Reserve balance ending	0		0
Medical Devices \| Other Restructuring
Restructuring Reserve [Roll Forward]
Reserve balance beginning			38
Restructuring charges			234
Payments for Restructuring			(241)
Restructuring Reserve, Settled without Cash			0
Reserve balance ending	$ 31		$ 31