Restructuring and Cost Reduction Activities Restructuring and Cost Reduction Activities - Project K Program Costs Narrative (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 28, 2020	Mar. 30, 2019
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 1	$ 8
Project K [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 8