Stock Compensation Summary of Share-based Compensation (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	12 Months Ended
	Jan. 02, 2016	Jan. 03, 2015	Dec. 28, 2013
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Outstanding, beginning of period - shares	21	20	25
Granted - shares	3	6	6
Exercised - shares	(5)	(4)	(10)
Forfeitures and expirations - shares	0	(1)	(1)
Outstanding, end of period - shares	19	21	20
Exerciseable, end of period - shares	10	10	9
Outstanding, beginning of period - weighted-average exercise price	$ 56	$ 54	$ 50
Granted - weighted-average exercise price	64	60	60
Exercised - weighted-average exercise price	53	50	48
Forfeitures and expirations - weighted-average exercise price	60	58	55
Outstanding, end of period - weighted-average exercise price	58	56	54
Exercisable, end of period - weighted-average exercise price	$ 55	$ 53	$ 50
Outstanding, end of period - weighted-average remaining contractual term (years)	6 years 11 months 6 days
Excerciseable, end of period - weighted-average remaining contractual term (years)	5 years 10 months 12 days
Oustanding, end of period - aggregate intrinsic value	$ 264
Exerciseable, end of period - aggregate intrinsic value	180
Total intrinsic value of options exercised	$ 65	$ 56	$ 139