Stock Plans (Schedule of information on stock option activity) (Details) (USD $)	12 Months Ended
	May 26, 2013	May 27, 2012	May 29, 2011
Options (Thousands) [Abstract]
Balance Outstanding Beginning Balance	60,942,700	67,547,300	81,104,600
Granted	3,407,700	4,069,000	5,234,300
Exercised	(16,534,600)	(10,279,300)	(18,665,400)
Forfeited or expired	(143,700)	(394,300)	(126,200)
Balance Outstanding Ending Balance	47,672,100	60,942,700	67,547,300
Balance Exercisable Beginning Balance	39,564,900	39,221,700	47,726,600
Balance Exercisable Ending Balance	29,290,300	39,564,900	39,221,700
Weighted Average Exercise Price [Abstract]
Balance Outstanding Beginning Balance	$ 27.96	$ 26.82	$ 25.17
Granted	$ 38.15	$ 37.29	$ 37.38
Exercised	$ 23.49	$ 24.12	$ 22.59
Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures And Expirations In Period Weighted Average Exercise Price	$ 34.06	$ 27.88	$ 31.26
Balance Outstanding Ending Balance	$ 30.22	$ 27.96	$ 26.82
Balance Exercisable Beginning Balance	$ 25.27	$ 23.78	$ 22.89
Balance Exercisable Ending Balance	$ 27.69	$ 25.27	$ 23.78