Supplemental Financial Information - Financial income and expense (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 29, 2019	Sep. 30, 2018	Sep. 29, 2019	Sep. 30, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Interest income	$ 17	$ 13	$ 42	$ 38
Interest expense	(98)	(61)	(274)	(197)
Total interest expense, net	(81)	(48)	(232)	(159)
Foreign exchange rate results	1	(1)	(6)	(1)
Extinguishment of debt	(1)	0	(11)	(26)
Miscellaneous financing costs/income and other, net	(4)	(70)	(8)	(72)
Total other financial income (expense)	(4)	(71)	(25)	(99)
Total	$ (85)	$ (119)	$ (257)	$ (258)