Acquisitions, Sale of Hospira Infusion Systems Net Assets, Collaborative Arrangement and Equity-Method Investments - Medivation (Details) - USD ($) $ / shares in Units, $ in Millions			3 Months Ended	9 Months Ended	12 Months Ended
		Sep. 28, 2016	Oct. 01, 2017	Oct. 01, 2017	Oct. 01, 2017	Dec. 31, 2016
Business Acquisition [Line Items]
Goodwill	[1]		$ 56,078	$ 56,078	$ 56,078	$ 54,449
Medivation [Member]
Business Acquisition [Line Items]
Business acquisition, per share in cash (in dollars per share)		$ 81.50
Consideration transferred in business acquisition		$ 14,300
Consideration transferred in business acquisition, net of cash acquired		13,900
Amount payable						$ 365
Identifiable intangible assets		12,200
Goodwill		6,100
Deferred tax liabilities		4,000
Contingent consideration assumed		259
Reduction in intangible assets due to measurement period adjustments					$ 1,000
Decrease in amortization of intangible assets due to measurement period adjustments			$ 38	$ 38
Medivation [Member] | In Process Research and Development [Member]
Business Acquisition [Line Items]
Identifiable intangible assets		4,100
Medivation [Member] | Developed Technology Rights [Member]
Business Acquisition [Line Items]
Identifiable intangible assets		$ 8,100
Acquired intangible assets, average useful life		12 years

[1] Amounts may not add due to rounding.