Costs Associated with Exit and Restructuring Activities - Rollforward of Exit and Restructuring Accruals (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 29, 2018	Sep. 30, 2017	Sep. 29, 2018	Sep. 30, 2017
Restructuring Reserve [Roll Forward]
Balance at the beginning of the period	$ 4	$ 7	$ 8	$ 10
Charged to earnings	4	5	9	10
Cash paid	(3)	(4)	(12)	(12)
Balance at the end of the period	5	$ 8	5	$ 8
Accrued liabilities
Restructuring Reserve [Roll Forward]
Balance at the end of the period	4		4
Other long-term liabilities
Restructuring Reserve [Roll Forward]
Balance at the end of the period	$ 1		$ 1