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Restructuring - Schedule of Restructuring Reserve (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 29, 2024	Dec. 31, 2023	Jan. 01, 2023
Restructuring Reserve [Roll Forward]
Restructuring charges	$ 234	$ 489	$ 275
R&D Restructuring Plan
Restructuring Reserve [Roll Forward]
Restructuring charges	100	500
Operating Segments
Restructuring Reserve [Roll Forward]
Restructuring charges	269	798
Innovative Medicine
Restructuring Reserve [Roll Forward]
Restructuring charges	102		100
Innovative Medicine | Operating Segments
Restructuring Reserve [Roll Forward]
Restructuring charges	102	479
Innovative Medicine | Restructuring Charges
Restructuring Reserve [Roll Forward]
Restructuring charges		449
Innovative Medicine | Costs of Goods and Services Sold
Restructuring Reserve [Roll Forward]
Restructuring charges		30
MedTech
Restructuring Reserve [Roll Forward]
Restructuring charges			$ 300
MedTech | Operating Segments
Restructuring Reserve [Roll Forward]
Restructuring charges	167	319
MedTech | Restructuring Charges
Restructuring Reserve [Roll Forward]
Restructuring charges	132	40
MedTech | Costs of Goods and Services Sold
Restructuring Reserve [Roll Forward]
Restructuring charges	$ 35	$ 279

X

- Definition

Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 45
-Paragraph 28
-Subparagraph (b)
-SubTopic 10
-Topic 230
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482740/230-10-45-28

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 420
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 2
-Subparagraph (SAB Topic 5.P.4.b.1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479823/420-10-S99-2

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 420
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482047/420-10-45-3

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 420
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 5.P.3)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479823/420-10-S99-1

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- Definition

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+ References

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