Derivative Instruments - Gain (Loss) Recognized In Income (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jul. 01, 2017	Jun. 30, 2018	Jul. 01, 2017
Derivative Instruments, Gain (Loss) [Line Items]
Total gain (loss) recognized in income	$ (1,000,000)	$ 0	$ (6,000,000)	$ 1,000,000
Derivative instruments not designated as hedges
Derivative Instruments, Gain (Loss) [Line Items]
Total gain (loss) recognized in income	6,000,000	(11,000,000)	19,000,000	(15,000,000)
Derivative instruments not designated as hedges | Foreign exchange contracts | Foreign exchange gain (loss) gain
Derivative Instruments, Gain (Loss) [Line Items]
Total gain (loss) recognized in income	1,000,000	(11,000,000)	1,000,000	(16,000,000)
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	$ 5,000,000	$ 0	$ 18,000,000	$ 1,000,000