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Fair Value Measurements (Carrying Value And Fair Value Of Long-Term Debt) (Details) (USD $)
May 26, 2013
May 27, 2012
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Carrying value of long-term debt $ 2,496,200,000 $ 1,803,600,000
Carrying Value
   
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Carrying value of long-term debt 2,500,000,000 1,800,000,000
Fair Value
   
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Fair value of long-term debt $ 2,400,000,000 $ 1,990,000,000