Equity - Reclassifications Out of AOCI (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended		12 Months Ended
	Jul. 02, 2016	Jul. 04, 2015	Jul. 02, 2016	Jul. 04, 2015	Jan. 02, 2016
Derivative Instruments, Gain (Loss) [Line Items]
COGS	$ 1,998	$ 2,257	$ 4,148	$ 4,568
SGA	(821)	(829)	(1,628)	(1,690)
Interest expense	68	58	285	112
Net experience loss	(1)	(1)	(2)	(2)
Prior service cost	2	2	2	5
Total before tax	385	308	606	612
Tax (expense) benefit	(106)	(85)	(153)	(161)
Net income	280	222	455	449	$ 614
Reclassification out of Accumulated Other Comprehensive Income
Derivative Instruments, Gain (Loss) [Line Items]
Net income	7	(1)	9	(2)
Reclassification out of Accumulated Other Comprehensive Income | (Gains) losses on cash flow hedges
Derivative Instruments, Gain (Loss) [Line Items]
Total before tax	6	(3)	8	(7)
Tax (expense) benefit	(2)	0	(3)	0
Net income	4	(3)	5	(7)
Reclassification out of Accumulated Other Comprehensive Income | (Gains) losses on cash flow hedges | Foreign currency exchange contracts
Derivative Instruments, Gain (Loss) [Line Items]
COGS	0	(9)	(7)	(16)
SGA	0	2	0	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	8	1
Reclassification out of Accumulated Other Comprehensive Income | (Gains) losses on cash flow hedges | Commodity contracts
Derivative Instruments, Gain (Loss) [Line Items]
COGS	4	3	7	6
Reclassification out of Accumulated Other Comprehensive Income | Amortization of postretirement and postemployment benefits
Derivative Instruments, Gain (Loss) [Line Items]
Net experience loss	1	1	2	2
Prior service cost	2	2	2	5
Total before tax	3	3	4	7
Tax (expense) benefit	0	(1)	0	(2)
Net income	$ 3	$ 2	$ 4	$ 5