Stock Compensation - Stock Options (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	6 Months Ended
	Jul. 02, 2016	Jul. 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)	(4)	(2)
Forfeitures and expirations (in shares)	0	0
Outstanding, end of period (in shares)	18	22
Exercisable, end of period (in shares)	10	13
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)	56	53
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 2 months 12 days	7 years 1 month 6 days
Exercisable, end of period, weighted-average remaining contractual term	6 years 2 months 12 days	6 years 1 month 6 days
Outstanding, end of period, aggregate intrinsic value	$ 335	$ 131
Exercisable, end of period, aggregate intrinsic value	$ 247	$ 114
Weighted-average fair value of options granted (in dollars per share)	$ 9.44	$ 7.20