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Fair Value of Financial Assets and Financial Liabilities Measured on Recurring Basis (Parenthetical) (Detail) (USD $)
In Millions, unless otherwise specified
May 06, 2012
Aug. 28, 2011
May 08, 2011
Aug. 29, 2010
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]        
Cash and cash equivalents $ 4,791 $ 4,009 $ 4,082 $ 3,214
Short-term investments 1,185 1,604    
U.S. Government and Agency Securities | Fair Value, Measurements, Recurring
       
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]        
Cash and cash equivalents 28 73    
Short-term investments 912 1,104    
Corporate Notes and Bonds | Fair Value, Measurements, Recurring
       
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]        
Cash and cash equivalents 10      
Short-term investments $ 59