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Restructuring - Narrative (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2019 | Jul. 01, 2018 | Jun. 30, 2019 | Jul. 01, 2018
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring charges | $ 57 | $ 57 | $ 93 | $ 99
Supply Chain |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring charges | 142 |  | 232 |
Restructuring charges recorded to date | 500 |  | 500 |
Supply Chain | Cost of products sold |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring charges | 38 |  | 61 |
Supply Chain | Other (income) expense |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring charges | 47 |  | 78 |
Supply Chain | Minimum |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring estimated cost | 1,900 |  | 1,900 |
Cost savings expected | 600 |  | 600 |
Supply Chain | Maximum |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring estimated cost | 2,300 |  | 2,300 |
Cost savings expected | 800 |  | 800 |
Medical Devices |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring charges |  |  | 232 |
Medical Devices |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring charges | $ 100 | $ 100 | $ 100 | $ 200
Medical Devices | Supply Chain | Minimum |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Period for activity |  |  | 4 years |
Medical Devices | Supply Chain | Maximum |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Period for activity |  |  | 5 years |

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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/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB Topic 5.P.4(d)) -URI http://asc.fasb.org/extlink&oid=115931487&loc=d3e140904-122747 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB Topic 5.P.4(b)(1)) -URI http://asc.fasb.org/extlink&oid=115931487&loc=d3e140904-122747 + Details
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