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Restructuring - Schedule of Restructuring Reserve (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 29, 2019 | Sep. 30, 2018 | Sep. 29, 2019 | Sep. 30, 2018
Restructuring Reserve [Roll Forward] |  |  |  |
Restructuring charges | $ 69 | $ 88 | $ 162 | $ 187
Period of cash outlays for severance expected to be paid out |  |  | 2 years |
Medical Devices |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |
Reserve balance beginning |  |  | $ 242 |
Restructuring charges |  |  | 360 |
Payments for Restructuring |  |  | (316) |
Restructuring Reserve, Settled without Cash |  |  | (81) |
Reserve balance ending | 205 |  | 205 |
Medical Devices | Employee Severance |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |
Reserve balance beginning |  |  | 194 |
Restructuring charges |  |  | 0 |
Payments for Restructuring |  |  | (14) |
Restructuring Reserve, Settled without Cash |  |  | 0 |
Reserve balance ending | 180 |  | 180 |
Medical Devices | Asset Write-off |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |
Reserve balance beginning |  |  | 0 |
Restructuring charges |  |  | 81 |
Payments for Restructuring |  |  | 0 |
Restructuring Reserve, Settled without Cash |  |  | (81) |
Reserve balance ending | 0 |  | 0 |
Medical Devices | Other Restructuring |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |
Reserve balance beginning |  |  | 48 |
Restructuring charges |  |  | 279 |
Payments for Restructuring |  |  | (302) |
Restructuring Reserve, Settled without Cash |  |  | 0 |
Reserve balance ending | $ 25 |  | $ 25 |

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