Restructuring and Cost Reduction Activities Reserves Rollforward (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018
Restructuring Reserve [Roll Forward]
Liability, beginning balance	$ 104	$ 160
Restructuring charge	113	143
Cash payments	(148)	(209)
Non-cash charges and other	(7)	10
Liability, ending balance	62	104
Employee related cost
Restructuring Reserve [Roll Forward]
Liability, beginning balance	93	97
Restructuring charge	49	63
Cash payments	(81)	(67)
Restructuring Reserve, Period Increase (Decrease)		0
Non-cash charges and other	0
Liability, ending balance	61	93
Pension curtailment (gain) loss, net
Restructuring Reserve [Roll Forward]
Liability, beginning balance	0	0
Restructuring charge	(5)	(30)
Cash payments	0	0
Restructuring Reserve, Period Increase (Decrease)		30
Non-cash charges and other	5
Liability, ending balance	0	0
Asset impairment
Restructuring Reserve [Roll Forward]
Liability, beginning balance	0	0
Restructuring charge	0	14
Cash payments	0	0
Non-cash charges and other	0	14
Liability, ending balance	0	0
Asset related costs
Restructuring Reserve [Roll Forward]
Liability, beginning balance	1	0
Restructuring charge	21	16
Cash payments	(10)	(9)
Non-cash charges and other	(12)	(6)
Liability, ending balance	0	1
Other cost
Restructuring Reserve [Roll Forward]
Liability, beginning balance	10	63
Restructuring charge	48	80
Cash payments	(57)	(133)
Non-cash charges and other	0	0
Liability, ending balance	$ 1	$ 10