Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 30, 2019	Mar. 31, 2018
Income Tax Disclosure [Abstract]
Provision (benefit) for income taxes	$ (13)	$ 8
U.S. based tax expense		5
Foreign taxes in profitable locations		$ 3
Gross unrecognized tax benefits	$ 50