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Restructuring - Narrative (Details) $ in Millions | 3 Months Ended
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Apr. 01, 2018 USD ($) Employee | Apr. 02, 2017 USD ($)
Restructuring Cost and Reserve [Line Items] |  |
Restructuring charges | $ 42 | $ 85
Medical Devices |  |
Restructuring Cost and Reserve [Line Items] |  |
Restructuring charges | 107 |
Restructuring charges recorded to date | $ 2,100 |
Number of positions eliminated | Employee | 2,500 |
Number of positions eliminated and receiving severance | Employee | 1,800 |
Medical Devices | Cost of products sold |  |
Restructuring Cost and Reserve [Line Items] |  |
Restructuring charges | $ 6 |
Medical Devices | Other Income Expense Net |  |
Restructuring Cost and Reserve [Line Items] |  |
Restructuring charges | $ 59 |
Medical Devices | Minimum |  |
Restructuring Cost and Reserve [Line Items] |  |
Positions eliminated (as a percent) | 5.00% |
Medical Devices | Maximum |  |
Restructuring Cost and Reserve [Line Items] |  |
Restructuring estimated cost | $ 2,400 |
Medical Devices |  |
Restructuring Cost and Reserve [Line Items] |  |
Restructuring charges | 100 | $ 200
Medical Devices | Minimum |  |
Restructuring Cost and Reserve [Line Items] |  |
Restructuring estimated cost | 1,900 |
Cost savings expected | $ 600 |
Period for activity | 4 years |
Medical Devices | Maximum |  |
Restructuring Cost and Reserve [Line Items] |  |
Restructuring estimated cost | $ 2,300 |
Cost savings expected | $ 800 |
Period for activity | 5 years |
Estimated cost settled with cash (as a percent) | 70.00% |

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- Definition Amount of costs incurred to date for the specified restructuring cost. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB Topic 5.P.4(b)) -URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140904-122747 + Details
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