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Fair Value Measurements - Additional Information (Detail) (USD $)
In Billions, unless otherwise specified
Aug. 26, 2012
May 27, 2012
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Carrying amount of long-term debt $ 2.9 $ 2.9
Long-term debt at fair value $ 3.5 $ 3.5