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Restructuring - Narrative (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 29, 2019 | Sep. 29, 2019 | Jun. 30, 2019 | Mar. 31, 2019 | Dec. 30, 2018 | Sep. 30, 2018 | Jul. 01, 2018 | Apr. 01, 2018 | Dec. 29, 2019 | Dec. 30, 2018 | Dec. 31, 2017
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |
Restructuring And Related Cost, Expected Period Of Cash Outlays For Severance Paid |  |  |  |  |  |  |  |  | 2 years |  |
Restructuring charges | $ 251 | $ 128 | $ 142 | $ 90 | $ 227 |  | $ 176 |  | $ 266 | $ 251 | $ 309
Medical Devices |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |
Restructuring charges |  |  |  |  |  | $ 190 |  | $ 107 | 400 |  |
Supply Chain |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |
Restructuring charges |  |  |  |  |  |  |  |  | 611 |  |
Restructuring Reserve |  |  |  |  | 242 |  |  |  |  | 242 |
Restructuring costs incurred since announced | 800 |  |  |  |  |  |  |  | 800 |  |
Supply Chain | Restructuring Charges [Member] |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |
Restructuring charges |  |  |  |  |  |  |  |  | 300 |  |
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 |  |  |  |  |  |  |  |  | 200 |  |
Supply Chain | Severance |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |
Restructuring charges |  |  |  |  |  |  |  |  | 0 |  |
Restructuring Reserve |  |  |  |  | 194 |  |  |  |  | 194 |
Supply Chain | Asset Write-offs |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |
Restructuring charges |  |  |  |  |  |  |  |  | 151 |  |
Restructuring Reserve |  |  |  |  | 0 |  |  |  |  | 0 |
Supply Chain | Other(2) |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |
Restructuring charges |  |  |  |  |  |  |  |  | 460 |  |
Restructuring Reserve |  |  |  |  | $ 48 |  |  |  |  | $ 48 |
Supply Chain | Minimum |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |
Pre-tax restructuring charges | 1,900 |  |  |  |  |  |  |  | 1,900 |  |
Restructuring and Related Cost, Expected Future Savings | 600 |  |  |  |  |  |  |  | $ 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 |  |  |  |  |  |  |  | $ 2,300 |  |
Restructuring and Related Cost, Expected Future Savings | $ 800 |  |  |  |  |  |  |  | $ 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 |  |  |  |  |  |  |  |  |  |  | 267
Medical Devices | Severance |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |
Restructuring Reserve |  |  |  |  |  |  |  |  |  |  | 229
Medical Devices | Asset Write-offs |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |
Restructuring Reserve |  |  |  |  |  |  |  |  |  |  | 0
Medical Devices | Other(2) |  |  |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |
Restructuring Reserve |  |  |  |  |  |  |  |  |  |  | $ 38

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