Supplemental Financial Information - Financial income and expense (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 28, 2020	Jun. 30, 2019	Jun. 28, 2020	Jun. 30, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Interest income	$ 4	$ 12	$ 8	$ 25
Interest expense	(94)	(89)	(176)	(176)
Total interest expense, net	(90)	(77)	(168)	(151)
(Gain) loss on extinguishment of debt	0	(10)	0	(10)
Foreign exchange rate results	(5)	(1)	(1)	(7)
Miscellaneous financing costs/income and other, net	(1)	(1)	(5)	(4)
Total other financial income/ (expense)	(6)	(12)	(6)	(21)
Total - Financial income and expenses	$ (96)	$ (89)	$ (174)	$ (172)