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Restructuring - Narrative (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Jan. 03, 2021 | Dec. 29, 2019 | Dec. 30, 2018
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring and related cost, expected period of cash outlays for severance paid | 2 years |  |
Restructuring charges | $ 247 | $ 266 | $ 251
Medical Devices |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges | 300 | 400 |
Supply Chain |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges | 448 |  |
Restructuring reserve |  | 180 |
Restructuring costs incurred since announced | 1,300 |  |
Supply Chain | Restructuring Charges |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges | 200 |  |
Supply Chain | Cost of products sold |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges | 100 |  |
Supply Chain | Other Income Expense Net |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges | 100 |  |
Supply Chain | Severance |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges | 0 |  |
Restructuring reserve |  | 164 |
Supply Chain | Asset Write-offs/Sales |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges | 43 |  |
Restructuring reserve |  | 0 |
Supply Chain | Other(2) |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges | 405 |  |
Restructuring reserve |  | $ 16 |
Supply Chain | Minimum |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Pre-tax restructuring charges | 1,900 |  |
Restructuring and related cost, expected future savings | $ 600 |  |
Supply Chain | Minimum | Medical Devices |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring and related cost, duration of restructuring plan | 4 years |  |
Supply Chain | Maximum |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Pre-tax restructuring charges | $ 2,300 |  |
Restructuring and related cost, expected future savings | $ 800 |  |
Supply Chain | Maximum | Medical Devices |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring and related cost, duration of restructuring plan | 5 years |  |
Medical Devices |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring reserve |  |  | 242
Medical Devices | Severance |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring reserve |  |  | 194
Medical Devices | Asset Write-offs/Sales |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring reserve |  |  | 0
Medical Devices | Other(2) |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring reserve |  |  | $ 48

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