Basis of Presentation and Significant Accounting Policies (Details) $ / shares in Units, $ in Millions		3 Months Ended	9 Months Ended
		Oct. 02, 2016 USD ($)	Oct. 01, 2017 USD ($) Operating_Segment	Oct. 02, 2016 USD ($)	Sep. 28, 2016 $ / shares	Jun. 24, 2016 $ / shares
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of business segments | Operating_Segment			2
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net tax benefit		$ 35		$ 85
Amount reclassified from operating activities	[1],[2]		$ (9,728)	(10,151)
Amount reclassified to financing activities	[1],[2]		$ (9,650)	(6,915)
Medivation [Member]
Business Acquisition [Line Items]
Business acquisition, per share in cash (in dollars per share) | $ / shares					$ 81.50
Anacor [Member]
Business Acquisition [Line Items]
Business acquisition, per share in cash (in dollars per share) | $ / shares						$ 99.25
Accounting Standards Update 2016-09, Statutory Tax Withholding Component [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Amount reclassified from operating activities				87
Amount reclassified to financing activities				$ 87

[1] Amounts for the three and nine months ended October 2, 2016 have been revised from previously reported amounts to reflect the adoption of a new accounting standard in the fourth quarter of 2016, as of January 1, 2016. For additional information, see Note 1B. Basis of Presentation and Significant Accounting Policies: Adoption of New Accounting Standards.

[2] Amounts may not add due to rounding.