Accumulated Other Comprehensive Income (loss) (Details) - USD ($) $ in Millions	3 Months Ended
	Apr. 01, 2017	Apr. 02, 2016
AOCI Attributable to Parent, Net of Tax
Beginning Balance	$ 792
Other comprehensive (loss) income before reclassifications	(4)	$ (25)
Amounts reclassified from AOCI	0	0
Tax benefit (expense)	0	7
Other comprehensive (loss) income	(4)	(18)
Ending Balance	795
Unrealized (loss) gain on sales hedging
AOCI Attributable to Parent, Net of Tax
Beginning Balance	6	(1)
Other comprehensive (loss) income before reclassifications	(6)	(20)
Amounts reclassified from AOCI	(1)	1
Tax benefit (expense)	1	4
Other comprehensive (loss) income	(6)	(15)
Ending Balance	0	(16)
Unrealized (loss)/ gain on forward interest rate swaps
AOCI Attributable to Parent, Net of Tax
Beginning Balance	(15)	(15)
Other comprehensive (loss) income before reclassifications	2	(9)
Amounts reclassified from AOCI	1	(1)
Tax benefit (expense)	(1)	3
Other comprehensive (loss) income	2	(7)
Ending Balance	(13)	(22)
Currency translation adjustments
AOCI Attributable to Parent, Net of Tax
Beginning Balance	(36)	(32)
Other comprehensive (loss) income before reclassifications	0	4
Amounts reclassified from AOCI	0	0
Tax benefit (expense)	0	0
Other comprehensive (loss) income	0	4
Ending Balance	(36)	(28)
Total
AOCI Attributable to Parent, Net of Tax
Beginning Balance	(45)	(48)
Ending Balance	$ (49)	$ (66)