Employees' Stock Incentive Plans and Management Incentive Plans 4 (Details) (USD $) Share data in Thousands, except Per Share data, unless otherwise specified	12 Months Ended			3 Months Ended	12 Months Ended
	Apr. 28, 2013	Apr. 29, 2012	Apr. 27, 2011	Apr. 28, 2013 $31.95 - $34.00 [Member]	Apr. 28, 2013 $31.95 - $34.00 [Member]	Apr. 28, 2013 $34.01 - $42.42 [Member]	Apr. 28, 2013 $42.43 - $55.72 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Lower Range of Exercise Price Per Share					$ 31.95	$ 34.01	$ 42.43
Upper Range of Exercise Price Per Share					$ 34.00	$ 42.42	$ 55.72
Options Outstanding, Number Outstanding	6,534			64	64	716	5,754
Options Outstanding, Weighted Average Remaining Life (in years)	5 years 1 month 25 days			6 months		3 years 1 month 25 days	5 years 5 months 13 days
Options Outstanding, Weighted Average Remaining Exercise Price	$ 49.76			$ 33.86	$ 33.86	$ 38.98	$ 51.28
Options Exercisable, Number Exercisable	2,573			64	64	290	2,219
Options Exercisable, Weighted Average Remaining Life (in years)	3 years 3 months 12 days				6 months	2 years 11 months 17 days	3 years 4 months 26 days
Options Exercisable, Weighted Average Exercise Price	$ 48.01			$ 33.86	$ 33.86	$ 38.85	$ 49.61
Proceeds from Stock Options Exercised	$ 113,477,000	$ 82,714,000	$ 154,774,000
Tax Benefit from Stock Options Exercised	$ 18,300,000	$ 15,100,000	$ 21,000,000