Stock Compensation Summary of Share-based Compensation (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2016	Jan. 02, 2016	Jan. 03, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Outstanding, beginning of period - shares	19	21	20
Granted - shares	3	3	6
Exercised - shares	(6)	(5)	(4)
Forfeitures and expirations - shares	(1)	0	(1)
Outstanding, end of period - shares	15	19	21
Exerciseable, end of period - shares	8	10	10
Outstanding, beginning of period - weighted-average exercise price	$ 58	$ 56	$ 54
Granted - weighted-average exercise price	76	64	60
Exercised - weighted-average exercise price	56	53	50
Forfeitures and expirations - weighted-average exercise price	67	60	58
Outstanding, end of period - weighted-average exercise price	62	58	56
Exercisable, end of period - weighted-average exercise price	$ 58	$ 55	$ 53
Outstanding, end of period - weighted-average remaining contractual term (years)	7 years
Excerciseable, end of period - weighted-average remaining contractual term (years)	5 years 9 months 18 days
Oustanding, end of period - aggregate intrinsic value	$ 172
Exerciseable, end of period - aggregate intrinsic value	133
Total intrinsic value of options exercised	$ 145	$ 65	$ 56