Operating Leases (Details Textual) (USD $) In Millions, unless otherwise specified	12 Months Ended
	May 27, 2012	May 29, 2011	May 30, 2010
Operating Leases (Additional Textual) [Abstract]
Sale of farm land in acres			17600 acres
Proceeds in cash from sale of farmland			$ 75.0
Deferred gain from sale of farm land			29.7
Initial term of lease agreement and renewal options	10 years
Renewal options	5 years
Continuing Operations [Member]
Rent expense from operations
Rent expense from operations	133.8	126.1	127.2
Discontinued Operations [Member]
Rent expense from operations
Rent expense from operations	$ 0	$ 0.4	$ 3.2