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Fair Value Measurements (Estimated Fair Value Of Company Long Term Debt) (Details) (USD $)
In Millions, unless otherwise specified
May 03, 2014
May 04, 2013
Notional Amount
   
Long-term debt $ 6,973 $ 6,578
Carrying Amount
   
Long-term debt 7,145 6,765
Fair Value
   
Long-term debt $ 7,797 $ 7,536