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Business Combinations and Divestitures (Details) - USD ($) |  |  | 3 Months Ended | 4 Months Ended | 9 Months Ended |
--- | --- | --- | --- | --- | --- | ---
Oct. 02, 2017 | Jun. 16, 2017 | Oct. 01, 2017 | Jul. 02, 2017 | Apr. 02, 2017 | Oct. 02, 2016 | Jul. 03, 2016 | Oct. 01, 2017 | Oct. 01, 2017 | Oct. 02, 2016 | Jan. 01, 2017
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Proceeds from Sale of Productive Assets |  |  |  |  |  |  |  |  | $ 726,000,000 | $ 873,000,000 |
Goodwill |  |  | $ 31,308,000,000 |  |  |  |  | $ 31,308,000,000 | 31,308,000,000 |  | $ 22,805,000,000
Payments to acquire businesses |  |  |  |  |  |  |  |  | 34,646,000,000 | 4,050,000,000 |
Asset write-downs |  |  |  |  |  |  |  |  | 309,000,000 | 187,000,000 |
API [Member] |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Proceeds from Sale of Productive Assets |  |  |  |  |  |  | $ 600,000,000 |  |  |  |
Medical Devices [Member] |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Goodwill |  |  | 13,774,000,000 |  |  |  |  | 13,774,000,000 | 13,774,000,000 |  | $ 11,702,000,000
Asset write-downs |  |  |  | $ 200,000,000 |  |  |  |  | 200,000,000 |  |
Actelion [Member] |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Goodwill, Subsequent Recognition of Deferred Tax Asset |  |  |  |  |  |  |  | 200,000,000 |  |  |
Goodwill |  | $ 5,986,000,000 | 5,757,000,000 |  |  |  |  | 5,757,000,000 | 5,757,000,000 |  |
Business Acquisition, Share Price |  | $ 280 |  |  |  |  |  |  |  |  |
Payments to acquire businesses |  |  |  |  |  |  |  |  | 29,100,000,000 |  |
Business Acquisition, Percentage of Voting Interests Acquired |  | 98.40% |  |  |  |  |  |  |  |  |
Business Combination, Consideration Transferred, Liabilities Incurred |  |  |  |  |  |  |  |  | 500,000,000 |  |
Business Combination, Adjustment, Liabilities Incurred |  |  | 200,000,000 |  |  |  |  |  |  |  |
Weighted average useful life |  | 9 years |  |  |  |  |  |  |  |  |
Business Combination, Revenue of acquiree since acquisition date, actual |  |  | 670,000,000 |  |  |  |  |  | 761,000,000 |  |
Business Acquisition, Net Income (Loss) of acquiree since acquisition date, actual |  |  | (552,000,000) |  |  |  |  |  | (668,000,000) |  |
Business Combination, Acquisition Related Costs |  |  | 400,000,000 |  |  |  |  |  | 600,000,000 |  |
Actelion [Member] | Minimum [Member] |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Finite-Lived Intangible Asset, Useful Life |  | 4 years |  |  |  |  |  |  |  |  |
Actelion [Member] | Maximum [Member] |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Finite-Lived Intangible Asset, Useful Life |  | 10 years |  |  |  |  |  |  |  |  |
Actelion [Member] | In-process research and development |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Fair Value Inputs, Discount Rate |  | 9.00% |  |  |  |  |  |  |  |  |
Idorsia [Member] |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Business Acquisition, Percentage of Voting Interests Acquired |  | 9.90% |  |  |  |  |  |  |  |  |
Convertible Note, Equity Interest, Percentage |  | 22.10% |  |  |  |  |  |  |  |  |
Idorsia [Member] | Convertible Debt [Member] |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Long-term Debt |  | $ 500,000,000 |  |  |  |  |  |  |  |  |
Debt Instrument, Term |  | 10 years |  |  |  |  |  |  |  |  |
Idorsia [Member] | Line of Credit [Member] |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity |  | $ 250,000,000 |  |  |  |  |  |  |  |  |
Idorsia [Member] | Debt Instrument, Redemption, Period One [Member] | Convertible Debt [Member] |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Convertible Note, Equity Interest, Percentage |  | 16.00% |  |  |  |  |  |  |  |  |
Debt Instrument, Restrictive Covenants, Shareholder Ownership Threshold, Percent |  | 20.00% |  |  |  |  |  |  |  |  |
AMO [Member] |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Weighted average useful life |  |  |  |  | 14 years 4 months 24 days |  |  |  |  |  |
AMO [Member] | Medical Devices [Member] |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Goodwill |  |  | 1,800,000,000 |  | $ 1,800,000,000 |  |  | 1,800,000,000 | 1,800,000,000 |  |
Payments to acquire businesses |  |  |  |  | 4,300,000,000 |  |  |  |  |  |
Total amortizable intangibles |  |  | 2,300,000,000 |  | $ 2,300,000,000 |  |  |  |  |  |
Vogue International LLC [Member] |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Payments to acquire businesses |  |  |  |  |  | $ 3,300,000,000 |  |  |  |  |
Weighted average useful life |  |  |  |  |  | 22 years |  |  |  |  |
Total amortizable intangibles |  |  |  |  |  | $ 2,300,000,000 |  |  |  |  |
Business Acquisition, Goodwill, Expected Tax Deductible Amount |  |  |  |  |  | $ 1,100,000,000 |  |  |  | $ 1,100,000,000 |
Subsequent Event [Member] | Compeed [Member] |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Proceeds from Sale of Productive Assets | $ 1,000,000,000 |  |  |  |  |  |  |  |  |  |
Trademarks | Vogue International LLC [Member] |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Finite-Lived Intangible Asset, Useful Life |  |  |  |  |  | 22 years |  |  |  |  |
Trademarks | Vogue International LLC [Member] | Minimum [Member] |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Finite-Lived Intangible Asset, Useful Life |  |  |  |  |  | 10 years |  |  |  |  |
Trademarks | Vogue International LLC [Member] | Maximum [Member] |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Finite-Lived Intangible Asset, Useful Life |  |  |  |  |  | 22 years |  |  |  |  |
Customer Relationships [Member] | Vogue International LLC [Member] |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Finite-Lived Intangible Asset, Useful Life |  |  |  |  |  | 15 years |  |  |  |  |
Discontinued Operations, Held-for-sale or Disposed of by Sale [Member] | Codman Neurosurgery [Member] |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Disposal Group, Including Discontinued Operation, Inventory, Current |  |  | 63,000,000 |  |  |  |  | 63,000,000 | 63,000,000 |  |
Disposal Group, Including Discontinued Operation, Other Assets, Noncurrent |  |  | 33,000,000 |  |  |  |  | 33,000,000 | 33,000,000 |  |
Goodwill |  |  | $ 106,000,000 |  |  |  |  | $ 106,000,000 | $ 106,000,000 |  |

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