Restructuring - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 29, 2019	Sep. 30, 2018	Sep. 29, 2019	Sep. 30, 2018
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 69	$ 88	$ 162	$ 187
Supply Chain
Restructuring Cost and Reserve [Line Items]
Restructuring charges	128		360
Restructuring charges recorded to date	598		598
Supply Chain | Cost of products sold
Restructuring Cost and Reserve [Line Items]
Restructuring charges	20		81
Supply Chain | Other (income) expense
Restructuring Cost and Reserve [Line Items]
Restructuring charges	39		117
Supply Chain | Minimum
Restructuring Cost and Reserve [Line Items]
Restructuring estimated cost	1,900		1,900
Cost savings expected	600		600
Supply Chain | Maximum
Restructuring Cost and Reserve [Line Items]
Restructuring estimated cost	2,300		2,300
Cost savings expected	800		800
Medical Devices
Restructuring Cost and Reserve [Line Items]
Restructuring charges			360
Medical Devices
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 100	$ 200	$ 200	$ 400
Medical Devices | Supply Chain | Minimum
Restructuring Cost and Reserve [Line Items]
Period for activity			4 years
Medical Devices | Supply Chain | Maximum
Restructuring Cost and Reserve [Line Items]
Period for activity			5 years