Income Taxes - Temporary Differences and Carryforwards (Details) - USD ($) $ in Millions	Dec. 31, 2017	Jan. 01, 2017
Components of Deferred Tax Assets and Liabilities [Abstract]
Deferred Tax Assets, Employee related obligations	$ 2,259	$ 2,958
Deferred Tax Assets, Stock based compensation	507	749
Deferred Tax Assets, International R&D capitalized for tax	1,307	1,264
Deferred Tax Assets, Reserves & liabilities	1,718	1,857
Deferred Tax Assets, Income reported for tax purposes	1,316	1,309
Deferred Tax Assets, Net operating loss carryforward international	762	717
Deferred Tax Assets, Undistributed Foreign Earnings	1,101
Deferred Tax Liabilities, Undistributed Foreign Earnings	(4,457)
Deferred Tax Assets, Miscellaneous international	755	1,135
Deferred Tax Assets Other Domestic	177	155
Deferred Tax Assets, Total deferred income taxes	9,902	10,144
Deferred Tax Liabilities, Depreciation	(9)	(219)
Deferred Tax Liabilities, Non-deductible intangibles	(6,506)	(6,672)
Deferred Tax Liabilities, Miscellaneous international	(194)	(15)
Deferred Tax Liabilities, Total deferred income taxes	$ (11,166)	$ (6,906)