SENIOR LONG-TERM DEBT (Net Interest Expense) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	May 25, 2014	May 26, 2013	May 27, 2012
Debt Disclosure [Abstract]
Long-term debt	$ 393.8	$ 284.0	$ 213.2
Short-term debt	1.5	0.7	0.3
Interest income	(2.5)	(3.0)	(4.0)
Interest capitalized	(13.8)	(6.1)	(5.5)
Interest expense, net	$ 379.0	$ 275.6	$ 204.0