Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Jan. 01, 2017	Jan. 03, 2016
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance	$ 70,418	$ 71,150	$ 69,752
Net change	1,702	(1,736)	(2,443)
Ending Balance	60,160	70,418	71,150
Foreign Currency Translation
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance	(9,047)	(8,435)	(4,803)
Net change	1,696	(612)	(3,632)
Ending Balance	(7,351)	(9,047)	(8,435)
Gain/(Loss) On Securities
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance	411	604	257
Net change	(179)	(193)	347
Ending Balance	232	411	604
Employee Benefit Plans
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance	(5,980)	(5,298)	(6,317)
Net change	(170)	(682)	1,019
Ending Balance	(6,150)	(5,980)	(5,298)
Gain/ (Loss) On Derivatives & Hedges
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance	(285)	(36)	141
Net change	355	(249)	(177)
Ending Balance	70	(285)	(36)
Accumulated Other Comprehensive Income
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance	(14,901)	(13,165)	(10,722)
Net change	1,702	(1,736)	(2,443)
Ending Balance	$ (13,199)	$ (14,901)	$ (13,165)