Restructuring - Schedule of Restructuring Reserve (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 29, 2024	Oct. 01, 2023	Sep. 29, 2024	Oct. 01, 2023
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 41	$ 158	$ 192	$ 433
Operating Segments
Restructuring Cost and Reserve [Line Items]
Restructuring charges	47	384	207	659
Innovative Medicine
Restructuring Cost and Reserve [Line Items]
Restructuring charges		100	100	400
Innovative Medicine | Operating Segments
Restructuring Cost and Reserve [Line Items]
Restructuring charges	19	149	100	424
MEDTECH
Restructuring Cost and Reserve [Line Items]
Restructuring charges		200	100	200
MEDTECH | Operating Segments
Restructuring Cost and Reserve [Line Items]
Restructuring charges	28	235	107	235
MEDTECH | Restructuring Charges
Restructuring Cost and Reserve [Line Items]
Restructuring charges	22	9	92	9
MEDTECH | Costs of Goods and Services Sold
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 6	$ 226	$ 15	$ 226