Derivative Instruments - Gain (Loss) (Details) - Derivative instruments not designated as hedges - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jul. 01, 2017	Jul. 02, 2016	Jul. 01, 2017	Jul. 02, 2016
Derivative Instruments, Gain (Loss) [Line Items]
Total (loss) gain recognized in income	$ (11)	$ 3	$ (15)	$ (1)
Foreign exchange contracts | Foreign exchange (loss) gain
Derivative Instruments, Gain (Loss) [Line Items]
Total (loss) gain recognized in income	(11)	2	(16)	(3)
Forward interest rate swaps | Interest expense, net
Derivative Instruments, Gain (Loss) [Line Items]
Total (loss) gain recognized in income	$ 0	$ 1	$ 1	$ 2