Derivative Instruments - Gain (Loss) Recognized In Income (Details) - Derivative instruments not designated as hedges - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 29, 2018	Sep. 30, 2017	Sep. 29, 2018	Sep. 30, 2017
Derivative Instruments, Gain (Loss) [Line Items]
Total gain (loss) recognized in income	$ 7	$ (5)	$ 26	$ (20)
Foreign exchange contracts | Foreign exchange (loss) gain
Derivative Instruments, Gain (Loss) [Line Items]
Total gain (loss) recognized in income	1	(6)	2	(22)
Forward interest rate swaps | Interest expense, net
Derivative Instruments, Gain (Loss) [Line Items]
Total gain (loss) recognized in income	$ 6	$ 1	$ 24	$ 2