Exit and Restructuring Costs (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 26, 2020	Sep. 28, 2019	Sep. 26, 2020	Sep. 28, 2019
Restructuring Cost and Reserve [Line Items]
Exit and restructuring costs	$ 1	$ 0	$ 7	$ 2
Estimated remaining costs	4		4
2019 Productivity Plan
Restructuring Cost and Reserve [Line Items]
Exit and restructuring costs	1		7
Exit and restructuring charges - cumulative	15		15
Estimated remaining costs	$ 3		$ 3