v2.3.0.11
Share Repurchase Program (Tables)
 6 Months Ended
Jun. 30, 2011
Share Repurchase Program Tables [Abstract]  
Share Repurchase Program Table [Table Text Block]
 Number of Shares Purchased Average Price Paid
 20112010 2011 2010
First quarter [a] 2,636,178 -$ 94.10$ -
Second quarter 3,576,399 6,496,400  100.75  71.74
Total 6,212,577 6,496,400$ 97.92$ 71.74
        
Remaining number of shares that may yet be repurchased36,423,601
        
[a] Shares repurchased in the first quarter were authorized by a prior share repurchase program, which expired March 31, 2011.