Stock Compensation Summary of Share-based Compensation (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	12 Months Ended
	Dec. 30, 2017	Dec. 31, 2016	Jan. 02, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Outstanding, beginning of period - shares	15	19	21
Granted - shares	2	3	3
Exercised - shares	(2)	(6)	(5)
Forfeitures and expirations - shares	(1)	(1)	0
Outstanding, end of period - shares	14	15	19
Exerciseable, end of period - shares	10	8	10
Outstanding, beginning of period - weighted-average exercise price	$ 62	$ 58	$ 56
Granted - weighted-average exercise price	73	76	64
Exercised - weighted-average exercise price	57	56	53
Forfeitures and expirations - weighted-average exercise price	70	67	60
Outstanding, end of period - weighted-average exercise price	64	62	58
Exercisable, end of period - weighted-average exercise price	$ 60	$ 58	$ 55
Outstanding, end of period - weighted-average remaining contractual term (years)	6 years 6 months
Excerciseable, end of period - weighted-average remaining contractual term (years)	5 years 7 months 6 days
Outstanding, end of period - aggregate intrinsic value	$ 36
Exerciseable, end of period - aggregate intrinsic value	36
Total intrinsic value of options exercised	$ 22	$ 145	$ 65