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Segments of Business and Geographic Areas - Operating Profit by Segment of Business (Details) - USD ($) $ in Millions	3 Months Ended
	Apr. 02, 2023	Apr. 03, 2022
Segment Reporting Information [Line Items]
Worldwide income/(loss) before tax	$ (737)	$ 5,862
Restructuring charges	130	70
In-process research and development	49	610
bermekimab
Segment Reporting Information [Line Items]
In-process research and development expense		600
MedTech
Segment Reporting Information [Line Items]
Restructuring charges		100
Operating Segments
Segment Reporting Information [Line Items]
Total Segment Operating Income	$ 6,665	6,087
Percentage Change in Operating Income Loss	9.50%
Operating Segments | CONSUMER HEALTH
Segment Reporting Information [Line Items]
Total Segment Operating Income	$ 776	686
Business Exit Costs	$ 300	102
Percentage Change in Operating Income Loss	13.10%
Amortization	$ 100
Operating Segments | PHARMACEUTICAL
Segment Reporting Information [Line Items]
Total Segment Operating Income	$ 4,444	3,924
Percentage Change in Operating Income Loss	13.30%
Unrealized gain (loss) on securities		(400)
Supply network costs	$ 400
Amortization	700	800
Operating Segments | MedTech
Segment Reporting Information [Line Items]
Total Segment Operating Income	$ 1,445	1,477
Percentage Change in Operating Income Loss	(2.20%)
Amortization	$ 400	300
Corporate, Non-Segment
Segment Reporting Information [Line Items]
Total Segment Operating Income	$ 7,102	$ 123

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