Restructuring Reserves (Details) $ in Millions	6 Months Ended
	Jun. 27, 2020 USD ($)
Restructuring Reserve [Roll Forward]
Beginning balance	$ 34
Costs incurred	38	[1]
Reserves reversed	(1)	[2]
Payments	(33)
Ending balance	38
Restructuring and Related Costs, Other Costs (Income), Net	$ 13
Restructuring Reserve, Expected Final Year of Payments	2020
Severance [Member]
Restructuring Reserve [Roll Forward]
Beginning balance	$ 18
Costs incurred	29
Reserves reversed	(1)	[2]
Payments	(24)
Ending balance	22
Abandonment of Excess Facilities [Member]
Restructuring Reserve [Roll Forward]
Beginning balance	10
Costs incurred	4
Payments	(4)
Ending balance	10
Other Restructuring [Member]
Restructuring Reserve [Roll Forward]
Beginning balance	6	[3]
Costs incurred	5	[3]
Payments	(5)	[3]
Ending balance	$ 6	[3]

[1] Excludes $13 million of charges for fixed asset writedowns and costs associated with environmental remediation at abandoned / previously owned facilities.

[2] Represents reductions in cost of plans.

[3] Other includes relocation and moving expenses associated with facility consolidations, as well as employee retention costs which are accrued ratably over the period through which employees must work to qualify for a payment.