Summary of Significant Accounting Policies - Narrative (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
	Jul. 03, 2016	Jul. 03, 2016	Jun. 28, 2015
Tax benefit	$ 123	$ 288
Net Cash Provided by (Used in) Operating Activities		6,753	$ 8,344
Net Cash Provided by (Used in) Financing Activities		1,642	6,002
New Accounting Pronouncement, Early Adoption, Effect | Accounting Standards Update 2016-09, Statutory Tax Withholding Component
Net Cash Provided by (Used in) Operating Activities		262	272
Net Cash Provided by (Used in) Financing Activities		$ 262	$ 272