Supplemental Financial Information - Financial income and expense (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 29, 2020	Mar. 31, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Interest income	$ 4	$ 13
Interest expense	(82)	(87)
Total interest expense, net	(78)	(74)
Foreign exchange rate results	4	(6)
Miscellaneous financing costs/income and other, net	(4)	(3)
Total other financial income/ (expense)	0	(9)
Total - Financial income and expenses	$ (78)	$ (83)