Pensions and Other Benefit Plans - Schedule of Net Funded Status (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 30, 2018	Dec. 31, 2017	Jan. 01, 2017
Amounts Recognized in the Company’s Balance Sheet consist of the following:
Non-current assets	$ 475	$ 526
Current liabilities	(399)	(325)
Non-current liabilities	(9,951)	(10,074)
Retirement Plans
Change in Benefit Obligation
Projected benefit obligation - beginning of year	33,221	28,116
Service cost	1,283	1,080	$ 949
Interest cost	996	927	927
Plan participant contributions	66	60
Amendments	26	(7)
Actuarial (gains) losses	(2,326)	2,996
Divestitures & acquisitions	(29)	201
Curtailments, settlements & restructuring	(21)	(35)
Benefits paid from plan	(1,018)	(1,050)
Effect of exchange rates	(528)	933
Projected benefit obligation - end of year	31,670	33,221	28,116
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Plan assets at fair value — beginning of year	28,404	23,633
Actual return on plan assets	(1,269)	4,274
Company contributions	1,140	664
Plan participant contributions	66	60
Settlements	(13)	(32)
Divestitures & acquisitions	(17)	173
Benefits paid from plan assets	(1,018)	(1,050)
Effect of exchange rates	(475)	682
Plan assets at fair value - End of year	26,818	28,404	23,633
Funded status - end of year	(4,852)	(4,817)
Amounts Recognized in the Company’s Balance Sheet consist of the following:
Non-current assets	475	526
Current liabilities	(98)	(92)
Non-current liabilities	(5,229)	(5,251)
Total recognized in the consolidated balance sheet — end of year	(4,852)	(4,817)
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss) [Abstract]
Net actuarial loss	8,323	8,140
Prior service cost (credit)	2	(25)
Unrecognized net transition obligation	0	0
Total before tax effects	8,325	8,115
Accumulated Benefit Obligation	28,533	29,793
Defined Benefit Plan, Amount Recognized in Net Periodic Benefit Cost (Credit) and Other Comprehensive (Income) Loss, before Tax [Abstract]
Net periodic benefit cost	923	594	422
Net actuarial (gain) loss	1,153	740
Amortization of net actuarial loss	(852)	(609)
Prior service cost (credit)	26	(7)
Amortization of prior service (cost) credit	(3)	(2)
Effect of exchange rates	(114)	256
Total loss/(income) recognized in other comprehensive income, before tax	210	378
Total recognized in net periodic benefit cost and other comprehensive income	1,133	972
Other Benefit Plans
Change in Benefit Obligation
Projected benefit obligation - beginning of year	4,582	4,605
Service cost	269	247	224
Interest cost	148	159	158
Plan participant contributions	0	0
Amendments	0	(17)
Actuarial (gains) losses	(119)	(166)
Divestitures & acquisitions	0	88
Curtailments, settlements & restructuring	0	2
Benefits paid from plan	(383)	(351)
Effect of exchange rates	(17)	15
Projected benefit obligation - end of year	4,480	4,582	4,605
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Plan assets at fair value — beginning of year	281	75
Actual return on plan assets	0	12
Company contributions	282	545
Plan participant contributions	0	0
Settlements	0	0
Divestitures & acquisitions	0	0
Benefits paid from plan assets	(383)	(351)
Effect of exchange rates	0	0
Plan assets at fair value - End of year	180	281	75
Funded status - end of year	(4,300)	(4,301)
Amounts Recognized in the Company’s Balance Sheet consist of the following:
Non-current assets	0	0
Current liabilities	(281)	(228)
Non-current liabilities	(4,019)	(4,073)
Total recognized in the consolidated balance sheet — end of year	(4,300)	(4,301)
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss) [Abstract]
Net actuarial loss	1,263	1,500
Prior service cost (credit)	(106)	(137)
Unrecognized net transition obligation	0	0
Total before tax effects	1,157	1,363
Defined Benefit Plan, Amount Recognized in Net Periodic Benefit Cost (Credit) and Other Comprehensive (Income) Loss, before Tax [Abstract]
Net periodic benefit cost	502	508	$ 477
Net actuarial (gain) loss	(111)	(169)
Amortization of net actuarial loss	(123)	(138)
Prior service cost (credit)	0	(17)
Amortization of prior service (cost) credit	31	30
Effect of exchange rates	(3)	3
Total loss/(income) recognized in other comprehensive income, before tax	(206)	(291)
Total recognized in net periodic benefit cost and other comprehensive income	$ 296	$ 217