Stock Compensation Summary of Share-based Compensation (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	12 Months Ended
	Dec. 29, 2018	Dec. 30, 2017	Dec. 31, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Outstanding, beginning of period - shares	14	15	19
Granted - shares	3	2	3
Exercised - shares	(2)	(2)	(6)
Forfeitures and expirations - shares	(1)	(1)	(1)
Outstanding, end of period - shares	14	14	15
Exerciseable, end of period - shares	10	10	8
Outstanding, beginning of period - weighted-average exercise price	$ 64	$ 62	$ 58
Granted - weighted-average exercise price	70	73	76
Exercised - weighted-average exercise price	58	57	56
Forfeitures and expirations - weighted-average exercise price	71	70	67
Outstanding, end of period - weighted-average exercise price	66	64	62
Exercisable, end of period - weighted-average exercise price	$ 63	$ 60	$ 58
Outstanding, end of period - weighted-average remaining contractual term (years)	6 years 3 months 18 days
Excerciseable, end of period - weighted-average remaining contractual term (years)	5 years 3 months 18 days
Outstanding, end of period - aggregate intrinsic value	$ 7
Exerciseable, end of period - aggregate intrinsic value	7
Total intrinsic value of options exercised	$ 33	$ 22	$ 145