Stock Compensation - Stock Options (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	9 Months Ended
	Oct. 01, 2016	Oct. 03, 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)	(6)	(4)
Forfeitures and expirations (in shares)	(1)	0
Outstanding, end of period (in shares)	15	20
Exercisable, end of period (in shares)	8	12
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)	67	0
Outstanding, end of period, weighted-average exercise price (in dollars per share)	62	58
Exercisable, end of period, weighted-average exercise price (in dollars per share)	$ 58	$ 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 1 month 6 days	6 years 6 days
Outstanding, end of period, aggregate intrinsic value	$ 226	$ 192
Exercisable, end of period, aggregate intrinsic value	$ 168	$ 145
Weighted-average fair value of options granted (in dollars per share)	$ 9.44	$ 7.20