Restructuring and Cost Reduction Activities Restructuring and Cost Reduction Activities - Total Projects Narrative (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 28, 2019	Sep. 29, 2018	Sep. 28, 2019	Sep. 29, 2018
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 18	$ 34	$ 91	$ 59
COGS
Restructuring Cost and Reserve [Line Items]
Restructuring charges	13	49	30	58
Selling, General and Administrative Expenses
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 5	15	$ 61	31
Other income (expense)
Restructuring Cost and Reserve [Line Items]
Restructuring charges		$ (30)		$ (30)