Restructuring - Schedule of Restructuring Reserve (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Apr. 02, 2023
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 164	$ 130
Operating Segments
Restructuring Cost and Reserve [Line Items]
Restructuring charges	171
Innovative Medicine
Restructuring Cost and Reserve [Line Items]
Restructuring charges	100	$ 100
Innovative Medicine | Operating Segments
Restructuring Cost and Reserve [Line Items]
Restructuring charges	144
MEDTECH | Operating Segments
Restructuring Cost and Reserve [Line Items]
Restructuring charges	27
MEDTECH | Restructuring Charges
Restructuring Cost and Reserve [Line Items]
Restructuring charges	20
MEDTECH | Costs of Goods and Services Sold
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 7