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Share Plans (Details) (USD $)
In Millions, except Per Share data, unless otherwise specified
3 Months Ended
Dec. 30, 2011
Y
Dec. 24, 2010
Y
Shared Based Compensation Arrangements:    
Number of awards, issued (in shares) 5.0 5.9
Schedule of weighted average assumptions    
Fair value assumption, expected stock price volatility (as a percent) 36.00% 33.00%
Fair value assumption, risk-free interest rate (as a percent) 1.48% 1.26%
Fair value assumption, expected annual dividend, per share (in dollars per share) $ 1.00 $ 0.84
Fair value assumption, expected option life (in years) 5.8 5.2
Share Options
   
Shared Based Compensation Arrangements:    
Awards granted, options, number (in shares) 3.4 3.9
Awards granted, options, weighted-average grant-date fair value (in dollars per share) $ 12.45 $ 9.13
Award vesting period (in years) 4 years 4 years
Restricted Stock Awards
   
Shared Based Compensation Arrangements:    
Awards granted, other than options, number (in shares) 1.1 1.4
Awards granted, other than options, weighted-average grant-date fair value (in dollars per share) $ 44.32 $ 37.29
Award vesting period (in years) 4 years 4 years
Performance Share Awards
   
Shared Based Compensation Arrangements:    
Awards granted, other than options, number (in shares) 0.5 0.6
Awards granted, other than options, weighted-average grant-date fair value (in dollars per share) $ 48.86 $ 41.17
Award vesting period (in years) 3 years 3 years