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Earnings Per Share (Tables)
 6 Months Ended
Jun. 30, 2011
Earnings Per Share (Tables) [Abstract]  
Weighted average shares outstanding
 
 
Three Months Ended

June 30,
 
Six Months Ended

June 30,
(in millions)
 
2011
 
2010
 
2011
 
2010
Weighted average shares outstanding - basic
 
1,528.6


 
1,516.6


 
1,527.5


 
1,515.6


Net effect of common stock equivalents
 
7.2


 
8.7


 
8.5


 


Weighted average shares outstanding - assuming dilution
 
1,535.8


 
1,525.3


 
1,536.0


 
1,515.6