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Segments of Business and Geographic Areas - Operating Profit by Segment of Business (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jul. 01, 2018 | Jul. 02, 2017 | Jul. 01, 2018 | Jul. 02, 2017
Segment Reporting Information [Line Items] |  |  |  |
Percentage Change in Operating Income Loss | 4.70% |  | 1.30% |
Earnings before provision for taxes on income | $ 4,973 | $ 4,748 | $ 10,454 | $ 10,323
Restructuring charges | 57 | 11 | 99 | 96
Asset Impairment Charges |  |  | 27 | 270
PHARMACEUTICAL |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Royalty Revenue, Monetization of Royalty |  |  |  | 200
Medical Devices |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Restructuring charges | 100 | 100 | 200 | 300
Litigation Settlement, Expense | 700 | 400 | 700 | 400
Asset Impairment Charges |  | 200 |  |
Operating Segments |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total Segment Operating Income | $ 5,276 | 5,064 | $ 11,069 | 10,886
Percentage Change in Operating Income Loss | 4.20% |  | 1.70% |
Operating Segments | CONSUMER |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total Segment Operating Income | $ 829 | 658 | $ 1,377 | 1,254
Percentage Change in Operating Income Loss | 26.00% |  | 9.80% |
Amortization | $ 100 | 100 |  |
Operating Segments | PHARMACEUTICAL |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total Segment Operating Income | $ 3,651 | 3,414 | $ 7,317 | 7,077
Percentage Change in Operating Income Loss | 6.90% |  | 3.40% |
Amortization | $ 800 | 200 | $ 1,500 | 200
Gain on sale of equity investments |  | 200 |  | 200
Operating Segments | Medical Devices |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total Segment Operating Income | $ 796 | 992 | $ 2,375 | 2,555
Percentage Change in Operating Income Loss | (19.80%) |  | (7.00%) |
Amortization | $ 300 | 300 | $ 500 | 500
Corporate, Non-Segment |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total Segment Operating Income | 303 | $ 316 | 615 | 563
Actelion |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Business Combination, Acquisition Related Costs | 100 |  | 200 |
Actelion | PHARMACEUTICAL |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Business Combination, Acquisition Related Costs | 100 |  | 200 | $ 200
NIZORAL [Member] | Operating Segments | CONSUMER |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Gain (Loss) on Disposition of Assets | 300 |  | 300 |
PANCREASE [Member] | Operating Segments | PHARMACEUTICAL |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Gain (Loss) on Disposition of Assets | $ 100 |  | $ 100 |

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