Equity - Reclassifications Out of AOCI (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended		12 Months Ended
	Jul. 04, 2015	Jun. 28, 2014	Jul. 04, 2015	Jun. 28, 2014	Jan. 03, 2015
Derivative Instruments, Gain (Loss) [Line Items]
COGS	$ (2,257)	$ (2,274)	$ (4,568)	$ (4,512)
SGA	(829)	(944)	(1,690)	(1,834)
Interest expense	(58)	(50)	(112)	(102)
Net experience loss	1	1	2	2
Prior service cost	2	4	5	6
Total before tax	308	420	612	992
Tax (expense) benefit	(85)	(122)	(161)	(287)
Net income	222	295	449	701	$ 633
Reclassification out of Accumulated Other Comprehensive Income
Derivative Instruments, Gain (Loss) [Line Items]
Net income	(1)	3	(2)	(2)
Reclassification out of Accumulated Other Comprehensive Income | (Gains) losses on cash flow hedges
Derivative Instruments, Gain (Loss) [Line Items]
Total before tax	(3)	(1)	(7)	(11)
Tax (expense) benefit	0	0	0	3
Net income	(3)	(1)	(7)	(8)
Reclassification out of Accumulated Other Comprehensive Income | (Gains) losses on cash flow hedges | Foreign currency exchange contracts
Derivative Instruments, Gain (Loss) [Line Items]
COGS	(9)	(1)	(16)	(2)
SGA	2	(2)	2	(3)
Reclassification out of Accumulated Other Comprehensive Income | (Gains) losses on cash flow hedges | Interest rate contracts
Derivative Instruments, Gain (Loss) [Line Items]
Interest expense	1	0	1	(9)
Reclassification out of Accumulated Other Comprehensive Income | (Gains) losses on cash flow hedges | Commodity contracts
Derivative Instruments, Gain (Loss) [Line Items]
COGS	3	2	6	3
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	4	5	6
Total before tax	3	5	7	8
Tax (expense) benefit	(1)	(1)	(2)	(2)
Net income	$ 2	$ 4	$ 5	$ 6