Restructuring and Cost Reduction Activities - Restructuring and Cost Reduction Reserves Rollforward (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jul. 01, 2017	Jul. 02, 2016	Jul. 01, 2017	Jul. 02, 2016
Restructuring Reserve [Roll Forward]
Liability, beginning balance			$ 131
Restructuring charges	$ 96	$ 72	238	$ 124
Cash payments			(127)
Restructuring Reserve, Accrual Adjustment			(21)
Liability, ending balance	221		221
Employee related costs
Restructuring Reserve [Roll Forward]
Liability, beginning balance			102
Restructuring charges	25	6	136	20
Cash payments			(52)
Restructuring Reserve, Accrual Adjustment			1
Liability, ending balance	187		187
Asset impairment
Restructuring Reserve [Roll Forward]
Liability, beginning balance			0
Restructuring charges	0	16	0	16
Cash payments			0
Restructuring Reserve, Accrual Adjustment			0
Liability, ending balance	0		0
Asset related costs
Restructuring Reserve [Roll Forward]
Liability, beginning balance			0
Restructuring charges	20	17	30	27
Cash payments			(8)
Restructuring Reserve, Accrual Adjustment			(22)
Liability, ending balance	0		0
Other costs
Restructuring Reserve [Roll Forward]
Liability, beginning balance			29
Restructuring charges	51	$ 33	72	$ 61
Cash payments			(67)
Restructuring Reserve, Accrual Adjustment			0
Liability, ending balance	$ 34		$ 34