Equity - Reclassifications Out of AOCI (Details) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Mar. 31, 2018	Apr. 01, 2017	Dec. 30, 2017
Derivative Instruments, Gain (Loss) [Line Items]
COGS	$ 2,149	$ 2,088
SG&A	(742)	(880)
Interest expense	69	61
Net experience loss	1	(1)
Total before tax	511	307
Tax expense (benefit)	(67)	(43)
Net income	444	266	$ 1,254
Reclassification out of Accumulated Other Comprehensive Income
Derivative Instruments, Gain (Loss) [Line Items]
Net income	1	2
Reclassification out of Accumulated Other Comprehensive Income | (Gains) losses on cash flow hedges
Derivative Instruments, Gain (Loss) [Line Items]
Total before tax	2	1
Tax expense (benefit)	0	0
Net income	2	1
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	(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	2	2
Reclassification out of Accumulated Other Comprehensive Income | Amortization of postretirement and postemployment benefits
Derivative Instruments, Gain (Loss) [Line Items]
Total before tax	(1)	1
Tax expense (benefit)	0	0
Net income	(1)	1
Reclassification out of Accumulated Other Comprehensive Income | Amortization of postretirement and postemployment benefits | Other Income (Expense), Net
Derivative Instruments, Gain (Loss) [Line Items]
Net experience loss	$ (1)	$ 1