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Financial Instruments (Available-For-Sale Securities At Market Value) (Details) (USD $)
In Millions, unless otherwise specified
May 26, 2013
Fair Value Disclosures [Abstract]  
Available-for-sale Securities, Cost $ 24.1
Available-for-sale Securities, Gross Unrealized Gains 0.2
Available-for-sale Securities, Gross Unrealized Losses 0
Available-for-sale Securities, Market Value $ 24.3