Restructuring (Details) $ in Millions	3 Months Ended		6 Months Ended
	Jul. 03, 2016 USD ($)	Jun. 28, 2015 USD ($)	Jul. 03, 2016 USD ($) Employee	Jun. 28, 2015 USD ($)	Jan. 03, 2016 USD ($)
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 114	$ 0	$ 234	$ 0
Medical Devices [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges	141		278
Restructuring charges recorded to date	$ 868		$ 868
Period of workforce reduction			2 years
Number of positions eliminated | Employee			900
Medical Devices [Member] | Cost of Sales [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges			$ 24
Medical Devices [Member] | Other Income Expense Net [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges			20
Medical Devices [Member] | Asset Write-off [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges			150
Medical Devices [Member] | Other Restructuring [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges			128
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%