Stock Compensation - Stock Options (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Apr. 02, 2016	Apr. 04, 2015
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Outstanding, beginning of period (in shares)	19	21
Granted (in shares)	3	3
Exercised (in shares)	(3)	(1)
Forfeitures and expirations (in shares)	0	0
Outstanding, end of period (in shares)	19	23
Exercisable, end of period (in shares)	12	14
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]
Outstanding, beginning of period, weighted-average exercise price (in dollars per share)	$ 58	$ 56
Granted, weighted-average exercise price (in dollars per share)	76	64
Exercised, weighted-average exercise price (in dollars per share)	55	52
Forfeitures and expirations, weighted-average exercise price (in dollars per share)	0	0
Outstanding, end of period, weighted-average exercise price (in dollars per share)	61	57
Exercisable, end of period, weighted-average exercise price (in dollars per share)	$ 57	$ 55
Outstanding, end of period, weighted-average remaining contractual term	7 years 4 months 24 days	7 years 4 months 24 days
Exercisable, end of period, weighted-average remaining contractual term	6 years 5 months 6 days	6 years 4 months 1 day
Outstanding, end of period, aggregate intrinsic value	$ 306	$ 204
Exercisable, end of period, aggregate intrinsic value	$ 242	$ 163
Weighted-average fair value of options granted (in dollars per share)	$ 9.45	$ 7.20