Equity - Reclassifications Out of AOCI (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended		12 Months Ended
	Jul. 01, 2017	Jul. 02, 2016	Jul. 01, 2017	Jul. 02, 2016	Dec. 31, 2016
Derivative Instruments, Gain (Loss) [Line Items]
COGS	$ 1,922	$ 1,998	$ 3,972	$ 4,148
SG&A	(812)	(821)	(1,656)	(1,628)
Interest expense	63	68	124	285
Net experience loss	0	(1)	(1)	(2)
Prior service cost		2		2
Total before tax	384	385	686	606
Tax expense (benefit)	(102)	(106)	(144)	(153)
Net income	282	280	544	455	$ 695
Reclassification out of Accumulated Other Comprehensive Income
Derivative Instruments, Gain (Loss) [Line Items]
Net income	2	7	4	9
Reclassification out of Accumulated Other Comprehensive Income | (Gains) losses on cash flow hedges
Derivative Instruments, Gain (Loss) [Line Items]
Total before tax	2	6	4	8
Tax expense (benefit)	0	(2)	(1)	(3)
Net income	2	4	3	5
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	0	(1)	(7)
SG&A	0	0	0	0
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	2	5	8
Reclassification out of Accumulated Other Comprehensive Income | (Gains) losses on cash flow hedges | Commodity contracts
Derivative Instruments, Gain (Loss) [Line Items]
COGS	0	4	0	7
Reclassification out of Accumulated Other Comprehensive Income | Amortization of postretirement and postemployment benefits
Derivative Instruments, Gain (Loss) [Line Items]
Net experience loss	0	1	1	2
Prior service cost	0	2	0	2
Total before tax	0	3	1	4
Tax expense (benefit)	0	0	0	0
Net income	$ 0	$ 3	$ 1	$ 4