Restructuring and Cost Reduction Activities Reserves Rollforward (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 29, 2018	Dec. 30, 2017
Restructuring Reserve [Roll Forward]
Liability, beginning balance	$ 160	$ 131
Restructuring charge	143	263
Cash payments	(209)	(339)
Non-cash charges and other	10	105
Liability, ending balance	104	160
Employee related cost
Restructuring Reserve [Roll Forward]
Liability, beginning balance	97	102
Restructuring charge	63	177
Cash payments	(67)	(182)
Restructuring Reserve, Period Increase (Decrease)		0
Non-cash charges and other	0
Liability, ending balance	93	97
Pension curtailment (gain) loss, net
Restructuring Reserve [Roll Forward]
Liability, beginning balance	0	0
Restructuring charge	(30)	(148)
Cash payments	0	0
Restructuring Reserve, Period Increase (Decrease)		148
Non-cash charges and other	30
Liability, ending balance	0	0
Asset impairment
Restructuring Reserve [Roll Forward]
Liability, beginning balance	0	0
Restructuring charge	14	0
Cash payments	0	0
Non-cash charges and other	(14)	0
Liability, ending balance	0	0
Asset related costs
Restructuring Reserve [Roll Forward]
Liability, beginning balance	0	0
Restructuring charge	16	77
Cash payments	(9)	(34)
Non-cash charges and other	(6)	(43)
Liability, ending balance	1	0
Other cost
Restructuring Reserve [Roll Forward]
Liability, beginning balance	63	29
Restructuring charge	80	157
Cash payments	(133)	(123)
Non-cash charges and other	0	0
Liability, ending balance	$ 10	$ 63