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Restructuring - Schedule of Restructuring Reserve (Details) - USD ($) $ in Millions | 12 Months Ended
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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 |

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