Equity - Reclassifications Out of AOCI (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended		12 Months Ended
	Oct. 01, 2016	Oct. 03, 2015	Oct. 01, 2016	Oct. 03, 2015	Jan. 02, 2016
Derivative Instruments, Gain (Loss) [Line Items]
COGS	$ 1,990	$ 2,096	$ 6,138	$ 6,664
SGA	(854)	(899)	(2,482)	(2,589)
Interest expense	58	56	343	168
Net experience loss	(1)	(1)	(3)	(3)
Prior service cost	1	2	3	7
Total before tax	355	272	961	884
Tax expense (benefit)	(62)	(66)	(215)	(227)
Net income	292	205	747	654	$ 614
Reclassification out of Accumulated Other Comprehensive Income
Derivative Instruments, Gain (Loss) [Line Items]
Net income	0	(3)	9	(5)
Reclassification out of Accumulated Other Comprehensive Income | (Gains) losses on cash flow hedges
Derivative Instruments, Gain (Loss) [Line Items]
Total before tax	0	(7)	8	(14)
Tax expense (benefit)	(1)	1	(4)	1
Net income	(1)	(6)	4	(13)
Reclassification out of Accumulated Other Comprehensive Income | (Gains) losses on cash flow hedges | Foreign currency exchange contracts
Derivative Instruments, Gain (Loss) [Line Items]
COGS	(4)	(11)	(11)	(27)
SGA	(1)	0	(1)	2
Reclassification out of Accumulated Other Comprehensive Income | (Gains) losses on cash flow hedges | Interest rate contracts
Derivative Instruments, Gain (Loss) [Line Items]
Interest expense	2	1	10	2
Reclassification out of Accumulated Other Comprehensive Income | (Gains) losses on cash flow hedges | Commodity contracts
Derivative Instruments, Gain (Loss) [Line Items]
COGS	3	3	10	9
Reclassification out of Accumulated Other Comprehensive Income | Amortization of postretirement and postemployment benefits
Derivative Instruments, Gain (Loss) [Line Items]
Net experience loss	1	1	3	3
Prior service cost	1	2	3	7
Total before tax	2	3	6	10
Tax expense (benefit)	(1)	0	(1)	(2)
Net income	$ 1	$ 3	$ 5	$ 8