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Earnings Per Share (Details) (USD $)
In Millions, except Per Share data, unless otherwise specified
3 Months Ended 6 Months Ended
Jul. 01, 2012
Jul. 03, 2011
Jul. 01, 2012
Jul. 03, 2011
Reconciliation of basic net earnings per share to diluted net earnings per share        
Basic net earnings per share $ 0.51 $ 1.01 $ 1.94 $ 2.28
Average shares outstanding - basic 2,747.4 2,740.5 2,741.7 2,739.6
Potential shares exercisable under stock option plans 138.1 168.9 138.0 168.8
Less: shares which could be repurchased under treasury stock method (104.1) (131.7) (104.1) (133.9)
Convertible debt shares 3.6 3.6 3.6 3.6
Incremental common shares attributable to accelerated share repurchase agreements 13.2 0 13.2 0
Average shares outstanding - diluted 2,798.2 2,781.3 2,792.4 2,778.1
Diluted net earnings per share $ 0.50 $ 1.00 $ 1.91 $ 2.25