Equity - Reclassifications Out of AOCI (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2017	Oct. 01, 2016	Sep. 30, 2017	Oct. 01, 2016	Dec. 31, 2016
Derivative Instruments, Gain (Loss) [Line Items]
COGS	$ 2,041	$ 1,990	$ 6,013	$ 6,138
SG&A	(768)	(854)	(2,424)	(2,482)
Interest expense	64	58	188	343
Net experience loss	0	(1)	(1)	(3)
Prior service cost		1		3
Total before tax	398	355	1,084	961
Tax expense (benefit)	(104)	(62)	(248)	(215)
Net income	297	292	841	747	$ 695
Reclassification out of Accumulated Other Comprehensive Income
Derivative Instruments, Gain (Loss) [Line Items]
Net income	2	0	6	9
Reclassification out of Accumulated Other Comprehensive Income | (Gains) losses on cash flow hedges
Derivative Instruments, Gain (Loss) [Line Items]
Total before tax	3	0	7	8
Tax expense (benefit)	(1)	(1)	(2)	(4)
Net income	2	(1)	5	4
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	(4)	(1)	(11)
SG&A		(1)		(1)
Reclassification out of Accumulated Other Comprehensive Income | (Gains) losses on cash flow hedges | Interest rate contracts
Derivative Instruments, Gain (Loss) [Line Items]
Interest expense	3	2	8	10
Reclassification out of Accumulated Other Comprehensive Income | (Gains) losses on cash flow hedges | Commodity contracts
Derivative Instruments, Gain (Loss) [Line Items]
COGS		3		10
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	3
Prior service cost		1		3
Total before tax	0	2	1	6
Tax expense (benefit)	0	(1)	0	(1)
Net income	$ 0	$ 1	$ 1	$ 5