Restructuring (Details) $ in Millions	3 Months Ended		9 Months Ended
	Oct. 02, 2016 USD ($)	Sep. 27, 2015 USD ($)	Oct. 02, 2016 USD ($) Employee	Sep. 27, 2015 USD ($)	Jan. 03, 2016 USD ($)
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 62	$ 0	$ 296	$ 0
Medical Devices [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges	109		387
Restructuring charges recorded to date	977		$ 977
Period of workforce reduction			2 years
Number of positions eliminated | Employee			1,170
Medical Devices [Member] | Cost of Sales [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges	3		$ 27
Medical Devices [Member] | Other Income Expense Net [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 44		64
Medical Devices [Member] | Asset Write-off [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges			158
Medical Devices [Member] | Other Restructuring [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges			229
Medical Devices [Member] | Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring estimated cost					$ 500
Restructuring charges			$ 0
Minimum [Member] | Medical Devices [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring estimated cost					2,000
Positions eliminated (as a percent)			4.00%
Maximum [Member] | Medical Devices [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring estimated cost					$ 2,400
Positions eliminated (as a percent)			6.00%