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Income Taxes - Additional Information (Detail) (USD $)
In Millions
Jun. 25, 2011
Sep. 25, 2010
Income Taxes [Line Items]    
Gross unrecognized tax benefits $ 1,200 $ 943
Unrecognized tax benefits that would affect the effective tax rate 534 404
Unrecognized tax benefits, gross interest and penalties accrued $ 266 $ 247