Stockholders' Equity - Changes in Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Apr. 02, 2017
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	$ 1,786	$ 1,499
Other comprehensive income, net of tax	77	46
Ending balance	1,975	1,635
Accumulated Other Comprehensive Loss
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	(505)	(598)
Other comprehensive income, net of tax	76	46
Ending balance	(429)	(552)
Derivatives Net Unrealized Gains/ (Losses)
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	(3)	8
Other comprehensive income, net of tax	0	0
Ending balance	(3)	8
Currency Translation Adjustment Net Unrealized Gain/(Losses)
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	(487)	(583)
Other comprehensive income, net of tax	76	44
Ending balance	(411)	(539)
Benefit Plans Actuarial Gains/(Losses)
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	(15)	(23)
Other comprehensive income, net of tax	0	2
Ending balance	$ (15)	$ (21)