v2.4.0.6
Income Taxes (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended
Nov. 20, 2011
Nov. 21, 2010
Income Taxes [Abstract]    
Estimated effective tax rate 35.50% 35.90%
Effective tax rates 40.80% 34.20%
Discrete tax expense (benefit) $ 29