Acquisitions, Assets and Liabilities Held for Sale, Research and Development and Collaborative Arrangements, Equity-Method Investments and Cost-Method Investment - Medivation (Details) - USD ($) $ / shares in Units, $ in Millions			9 Months Ended
		Sep. 28, 2016	Oct. 02, 2016	Sep. 27, 2015	Dec. 31, 2015
Business Acquisition [Line Items]
Cash payments for acquisition, net of cash acquired	[1]		$ 17,679	$ 16,322
Goodwill	[2]		56,281		$ 48,242
Medivation [Member]
Business Acquisition [Line Items]
Business acquisition, per share in cash (in dollars per share)		$ 81.50
Payments for acquisitions, cash portion		$ 14,300
Cash payments for acquisition, net of cash acquired		13,900
Identifiable intangible assets		13,200
Goodwill		5,500
Deferred tax liabilities		4,400
Contingent consideration assumed		374
Medivation [Member] | In Process Research and Development [Member]
Business Acquisition [Line Items]
Identifiable intangible assets		4,800
Medivation [Member] | Developed Technology Rights [Member]
Business Acquisition [Line Items]
Identifiable intangible assets		$ 8,500
Acquired intangible assets, average useful life		12 years
Other Current Liabilities [Member] | Medivation [Member]
Business Acquisition [Line Items]
Amount payable			$ 1,000

[1] Amounts may not add due to rounding.

[2] Amounts may not add due to rounding.