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Income Taxes (Interest Expense On Unrecognized Tax Benefits) (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
May 27, 2012
May 29, 2011
May 30, 2010
Income Tax Disclosure [Abstract]      
Interest expense on unrecognized tax benefits $ 0.4 $ 1.6 $ 2.5