Restructuring - Narrative (Details) $ in Millions	3 Months Ended					12 Months Ended
	Jan. 01, 2017 USD ($)	Oct. 02, 2016 USD ($)	Jul. 03, 2016 USD ($)	Apr. 03, 2016 USD ($)	Jan. 03, 2016 USD ($)	Jan. 01, 2017 USD ($) Employee	Jan. 03, 2016 USD ($)	Dec. 28, 2014 USD ($)
Restructuring Cost and Reserve [Line Items]
Restructuring charges						$ 491	$ 509	$ 0
Medical Devices
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 298	$ 109	$ 141	$ 137	$ 590	685	$ 590
Restructuring costs incurred since announced	1,275					$ 1,275
Period of workforce reduction						2 years
Number of positions eliminated | Employee						1,500
Medical Devices | Cost of products sold
Restructuring Cost and Reserve [Line Items]
Restructuring charges						$ 45
Medical Devices | Other Income Expense Net
Restructuring Cost and Reserve [Line Items]
Restructuring charges						149
Medical Devices | Severance
Restructuring Cost and Reserve [Line Items]
Pre-tax restructuring charges	500					500
Restructuring charges						0
Minimum | Medical Devices
Restructuring Cost and Reserve [Line Items]
Pre-tax restructuring charges	2,000					$ 2,000
Percent of workforce eliminated						4.00%
Maximum | Medical Devices
Restructuring Cost and Reserve [Line Items]
Pre-tax restructuring charges	$ 2,400					$ 2,400
Percent of workforce eliminated						6.00%