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Segments of Business and Geographic Areas - Operating Profit by Segment of Business (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Oct. 02, 2022	Oct. 03, 2021	Oct. 02, 2022	Oct. 03, 2021
Segment Reporting Information [Line Items]
Worldwide income before tax	$ 5,822	$ 3,849	$ 17,524	$ 17,940
Percentage Change in Operating Income Loss	51.30%		(2.30%)
Amount prepaid and due to manufacturers			$ 500
Restructuring charges	$ 82	60	237	169
In-process research and development	0	900	610	900
bermekimab | In-process research and development
Segment Reporting Information [Line Items]
Impairment of intangible assets			600
CONSUMER HEALTH (1) | Risperdal
Segment Reporting Information [Line Items]
Litigation expense		800
PHARMACEUTICAL(1) | Risperdal
Segment Reporting Information [Line Items]
Litigation expense		800		700
MedTech
Segment Reporting Information [Line Items]
Amortization			800	800
Restructuring charges			100	200
Operating Segments
Segment Reporting Information [Line Items]
Total Segment Operating Income	$ 6,182	4,046	$ 18,614	18,592
Percentage Change in Operating Income Loss	52.80%		0.10%
Operating Segments | CONSUMER HEALTH (1)
Segment Reporting Information [Line Items]
Total Segment Operating Income	$ 809	(577)	$ 2,279	1,131
Business Exit Costs	249	0	619	0
Amortization	100		300	300
Litigation expense		1,400	100	1,500
Operating Segments | PHARMACEUTICAL(1)
Segment Reporting Information [Line Items]
Total Segment Operating Income	$ 4,249	4,200	$ 12,593	13,663
Percentage Change in Operating Income Loss	1.20%		(7.80%)
Amortization	$ 700	800	$ 2,200	2,500
Gain (loss) on disposition of assets			600
Unrealized gain (loss) on securities	(200)	100	(700)	200
Supply network costs	400		700
Operating Segments | MedTech
Segment Reporting Information [Line Items]
Total Segment Operating Income	1,124	423	$ 3,742	3,798
Percentage Change in Operating Income Loss			(1.50%)
Amortization	300	300
Litigation expense	200		$ 200
In-process research and development		900		900
Corporate, Non-Segment
Segment Reporting Information [Line Items]
Total Segment Operating Income	$ 111	$ 197	$ 471	$ 652

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