Supplemental Financial Information - Financial income and expense (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 27, 2020	Sep. 29, 2019	Sep. 27, 2020	Sep. 29, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Interest income	$ 3	$ 17	$ 11	$ 42
Interest expense	(100)	(98)	(276)	(274)
Total interest expense, net	(97)	(81)	(265)	(232)
(Gain) loss on extinguishment of debt	0	(1)	0	(11)
Foreign exchange rate results	(5)	1	(6)	(6)
Miscellaneous financing costs/income and other, net	(4)	(4)	(9)	(8)
Total other financial income/ (expense)	(9)	(4)	(15)	(25)
Total - Financial income and expenses	$ (106)	$ (85)	$ (280)	$ (257)