Stock Plans (Schedule of net cash proceeds from the exercise of stock options less shares used for withholding taxes and the intrisic value of options exercised) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	May 26, 2013	May 27, 2012	May 29, 2011
STOCK PLANS [Abstract]
Net cash proceeds	$ 300.8	$ 233.5	$ 410.4
Intrinsic value of options exercised	$ 297.2	$ 156.7	$ 275.6