Derivative Instruments - (Loss) Gain Recognized In Income (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Apr. 01, 2017
Derivative Instruments, Gain (Loss) [Line Items]
Total gain (loss) recognized in income	$ (5)	$ 1
Derivative instruments not designated as hedges
Derivative Instruments, Gain (Loss) [Line Items]
Total gain (loss) recognized in income	13	(4)
Derivative instruments not designated as hedges | Foreign exchange contracts | Foreign exchange loss
Derivative Instruments, Gain (Loss) [Line Items]
Total gain (loss) recognized in income	0	(5)
Derivative instruments not designated as hedges | Forward interest rate swaps | Interest expense, net
Derivative Instruments, Gain (Loss) [Line Items]
Total gain (loss) recognized in income	$ 13	$ 1