Pensions and Other Benefit Plans - Schedule of Net Funded Status (Details) - USD ($) $ in Millions	12 Months Ended
	Jan. 01, 2017	Jan. 03, 2016	Dec. 28, 2014
Amounts Recognized in the Company’s Balance Sheet consist of the following:
Non-current assets	$ 227	$ 256
Current liabilities	(412)	(417)
Non-current liabilities	(9,615)	(8,854)
Retirement Plans
Change in Benefit Obligation
Projected benefit obligation - beginning of year	25,855	26,889
Service cost	949	1,037	$ 882
Interest cost	927	988	1,018
Plan participant contributions	54	48
Amendments	(48)	60
Actuarial (gains) losses	2,302	(1,578)
Divestitures & acquisitions	(24)	(5)
Curtailments, settlements & restructuring	(25)	(20)
Benefits paid from plan	(1,210)	(773)
Effect of exchange rates	(664)	(791)
Projected benefit obligation - end of year	28,116	25,855	26,889
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Plan assets at fair value — beginning of year	22,254	22,575
Actual return on plan assets	2,286	298
Company contributions	838	752
Settlements	(25)	(20)
Divestitures & acquisitions	(24)	(5)
Effect of exchange rates	(540)	(621)
Plan assets at fair value - End of year	23,633	22,254	22,575
Projected Benefit Obligation	(4,483)	(3,601)
Amounts Recognized in the Company’s Balance Sheet consist of the following:
Non-current assets	227	256
Current liabilities	(86)	(77)
Non-current liabilities	(4,624)	(3,780)
Total recognized in the consolidated balance sheet — end of year	(4,483)	(3,601)
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss) [Abstract]
Net actuarial loss	7,749	6,501
Prior service cost (credit)	(12)	34
Unrecognized net transition obligation	0	0
Total before tax effects	7,737	6,535
Accumulated Benefit Obligation	25,319	23,262
Amount Recognized in Net Periodic Benefit Cost and Other Comprehensive Income (Loss), before Tax [Abstract]
Net periodic benefit cost	422	971	743
Net actuarial (gain) loss	1,965	(75)
Amortization of net actuarial loss	(496)	(745)
Prior service cost (credit)	(48)	60
Amortization of prior service (cost) credit	(1)	(2)
Effect of exchange rates	(218)	(218)
Total recognized in other comprehensive income, before tax	1,202	(980)
Total recognized in net periodic benefit cost and other comprehensive income	1,624	(9)
Other Benefit Plans
Change in Benefit Obligation
Projected benefit obligation - beginning of year	4,669	5,081
Service cost	224	257	211
Interest cost	158	186	197
Plan participant contributions	0	0
Amendments	0	0
Actuarial (gains) losses	(73)	(400)
Divestitures & acquisitions	0	0
Curtailments, settlements & restructuring	0	(3)
Benefits paid from plan	(378)	(420)
Effect of exchange rates	5	(32)
Projected benefit obligation - end of year	4,605	4,669	5,081
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Plan assets at fair value — beginning of year	74	79
Actual return on plan assets	7	1
Company contributions	372	414
Settlements	0	0
Divestitures & acquisitions	0	0
Effect of exchange rates	0	0
Plan assets at fair value - End of year	75	74	79
Projected Benefit Obligation	(4,530)	(4,595)
Amounts Recognized in the Company’s Balance Sheet consist of the following:
Non-current assets	0	0
Current liabilities	(315)	(324)
Non-current liabilities	(4,215)	(4,271)
Total recognized in the consolidated balance sheet — end of year	(4,530)	(4,595)
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss) [Abstract]
Net actuarial loss	1,804	2,013
Prior service cost (credit)	(150)	(185)
Unrecognized net transition obligation	0	0
Total before tax effects	1,654	1,828
Amount Recognized in Net Periodic Benefit Cost and Other Comprehensive Income (Loss), before Tax [Abstract]
Net periodic benefit cost	477	604	$ 503
Net actuarial (gain) loss	(72)	(389)
Amortization of net actuarial loss	(135)	(201)
Prior service cost (credit)	0	0
Amortization of prior service (cost) credit	34	33
Effect of exchange rates	(1)	(1)
Total recognized in other comprehensive income, before tax	(174)	(558)
Total recognized in net periodic benefit cost and other comprehensive income	303	$ 46
U.S. Plans
Amount Recognized in Net Periodic Benefit Cost and Other Comprehensive Income (Loss), before Tax [Abstract]
Lump sum pension settlement	$ 420