Restructuring - Summary of Severance Charges and Associated Spending (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Oct. 01, 2017	Jul. 02, 2017	Apr. 02, 2017	Jan. 01, 2017	Oct. 02, 2016	Jul. 03, 2016	Apr. 03, 2016	Dec. 31, 2017	Jan. 01, 2017	Jan. 03, 2016
Restructuring Reserve [Roll Forward]
Restructuring charges									$ 309	$ 491	$ 509
Medical Devices
Restructuring Reserve [Roll Forward]
Reserve balance beginning				$ 381				$ 501	381	501	590
Activity during the period										(120)	(89)
Restructuring charges	$ 284	$ 187	$ 128	161	$ 298	$ 109	$ 141	137	850	685	590
Cash payments									(680)
Settled non cash									(194)
Reserve balance ending	267				381				267	381	501
Restructuring Reserve, Accrual Adjustment									(90)
Medical Devices | Severance
Restructuring Reserve [Roll Forward]
Reserve balance beginning				380				484	380	484	484
Activity during the period										(104)
Reserve balance ending	229				380				229	380	484
Medical Devices | Asset Write-offs
Restructuring Reserve [Roll Forward]
Reserve balance beginning				0				0	0	0	86
Activity during the period										0	(86)
Restructuring charges									194
Settled non cash									(194)
Reserve balance ending	0				0				0	0	0
Medical Devices | Other
Restructuring Reserve [Roll Forward]
Reserve balance beginning				$ 1				$ 17	1	17	20
Activity during the period										(16)	(3)
Restructuring charges									656
Reserve balance ending	$ 38				$ 1				38	$ 1	$ 17
Medical Devices | Severance
Restructuring Reserve [Roll Forward]
Cash payments									(61)
Restructuring Reserve, Accrual Adjustment									(90)
Medical Devices | Other
Restructuring Reserve [Roll Forward]
Cash payments									$ (619)