Stock Compensation (Summary of Share-based Compensation) (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 28, 2013	Dec. 29, 2012	Dec. 31, 2011
Stock Compensation [Abstract]
Outstanding, beginning of period - Shares	25	24	26
Granted - Shares	6	6	5
Exercised - shares	(10)	(4)	(6)
Forfeitures and expirations - Shares	(1)	(1)	(1)
Outstanding, end of period - Shares	20	25	24
Exercisable, end of period - Shares	9	14	16
Outstanding, beginning of period - Weighted-average exercise price	$ 50	$ 48	$ 47
Granted - Weighted-average exercise price	$ 60	$ 52	$ 53
Exercised - Weighted-average exercise price	$ 48	$ 44	$ 45
Forfeitures and expirations - Weighted-average exercise price	$ 55	$ 53	$ 52
Outstanding, end of period - Weighted-average exercise price	$ 54	$ 50	$ 48
Exercisable, end of period - Weighted-average exercise price	$ 50	$ 48	$ 47
Outstanding, end of period - Weighted-average remaining contractual term (years)	7 years
Exercisable, end of period - Weighted-average remaining contractual term (years)	5 years 4 months 24 days
Outstanding, end of period - Aggregate intrinsic value	$ 143
Exercisable, end of period - Aggregate intrinsic value	101
Total intrinsic value of options exercised	$ 139	$ 34	$ 63