Restructuring - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Jan. 03, 2021	Dec. 29, 2019	Dec. 30, 2018
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected period of cash outlays for severance paid	2 years
Restructuring charges	$ 247	$ 266	$ 251
Medical Devices
Restructuring Cost and Reserve [Line Items]
Restructuring charges	300	400
Supply Chain
Restructuring Cost and Reserve [Line Items]
Restructuring charges	448
Restructuring reserve		180
Restructuring costs incurred since announced	1,300
Supply Chain | Restructuring Charges
Restructuring Cost and Reserve [Line Items]
Restructuring charges	200
Supply Chain | Cost of products sold
Restructuring Cost and Reserve [Line Items]
Restructuring charges	100
Supply Chain | Other Income Expense Net
Restructuring Cost and Reserve [Line Items]
Restructuring charges	100
Supply Chain | Severance
Restructuring Cost and Reserve [Line Items]
Restructuring charges	0
Restructuring reserve		164
Supply Chain | Asset Write-offs/Sales
Restructuring Cost and Reserve [Line Items]
Restructuring charges	43
Restructuring reserve		0
Supply Chain | Other(2)
Restructuring Cost and Reserve [Line Items]
Restructuring charges	405
Restructuring reserve		$ 16
Supply Chain | Minimum
Restructuring Cost and Reserve [Line Items]
Pre-tax restructuring charges	1,900
Restructuring and related cost, expected future savings	$ 600
Supply Chain | Minimum | Medical Devices
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, duration of restructuring plan	4 years
Supply Chain | Maximum
Restructuring Cost and Reserve [Line Items]
Pre-tax restructuring charges	$ 2,300
Restructuring and related cost, expected future savings	$ 800
Supply Chain | Maximum | Medical Devices
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, duration of restructuring plan	5 years
Medical Devices
Restructuring Cost and Reserve [Line Items]
Restructuring reserve			242
Medical Devices | Severance
Restructuring Cost and Reserve [Line Items]
Restructuring reserve			194
Medical Devices | Asset Write-offs/Sales
Restructuring Cost and Reserve [Line Items]
Restructuring reserve			0
Medical Devices | Other(2)
Restructuring Cost and Reserve [Line Items]
Restructuring reserve			$ 48