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Fair Value Measurements (Carrying Value And Fair Value Of Long-Term Debt) (Details) (USD $)
In Billions, unless otherwise specified
Nov. 25, 2012
May 27, 2012
Fair Value Disclosures [Abstract]    
Carrying value of long-term debt $ 2.50 $ 1.80
Fair value of long-term debt $ 2.77 $ 1.99